CN109803436B

CN109803436B - Method and device for random access

Info

Publication number: CN109803436B
Application number: CN201711147410.9A
Authority: CN
Inventors: 王宇晨; 于海凤; 曹振臻; 王学龙
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-11-17
Filing date: 2017-11-17
Publication date: 2021-05-18
Anticipated expiration: 2037-11-17
Also published as: CN113556824B; WO2019096073A1; CN113556824A; CN109803436A

Abstract

Embodiments of the present application disclose a random access method and device, which relate to the field of communications technologies, so that a terminal device configured with one PUL and at least one SUL and in a connected state determines an uplink carrier for initiating random access, so as to complete random access. access. The random method is applied to a chip in a terminal device in a connected state and configured with at least two uplink carriers or the terminal device. The method includes: receiving first information sent by an access network device, where the first information is used to determine at least one uplink carrier having random access resources in at least two uplink carriers; and at least one uplink carrier having random access resources in at least one uplink carrier Determine the uplink carrier for initiating random access; initiate random access on the uplink carrier that initiates random access.

Description

Random access method and device

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a random access method and a random access device.

Background

In order to meet the transmission requirements of large capacity and high speed of Mobile Communication systems, the 5 Generation Mobile Communication Technology (5G) system introduces a high frequency band greater than 6 gigahertz (GHz) for Communication. Generally, when a terminal device is in a cell edge region and transmits a signal to a base station using a high frequency uplink carrier because the transmission loss of the high frequency signal is large and the penetration capability is weak during transmission, the base station may not receive the signal transmitted by the terminal device, but the terminal device may receive a signal transmitted by the base station through a high frequency Downlink (DL). This presents the problem of asymmetrical uplink and downlink coverage.

In order to solve the problem of asymmetric uplink and downlink coverage, at least one low-frequency band, for example, a Long Term Evolution (LTE) band, is introduced into the 5G system to assist the terminal device in transmitting uplink data. Here, the original high frequency Uplink carrier is referred to as a Primary Uplink (Primary Uplink), and the newly introduced low frequency Uplink carrier is referred to as a Secondary Uplink (SUL). Thus, in one cell, a terminal device is configured with one PUL and at least one SUL.

In a scenario where a terminal device is configured with one PUL and at least one SUL in a certain cell, if the terminal device is in an Idle (Idle) state, the terminal device may determine, by determining a size relationship between Reference Signal Received Power (RSRP) of a downlink Reference Signal and a preset RSRP threshold, an uplink carrier initiating random access in the PUL and the at least one SUL.

However, in a scenario where a terminal device is configured with one PUL and at least one SUL in a certain cell, there is no method for the terminal device in a Connected state (Connected) to determine an uplink carrier initiating random access so as to complete random access.

Disclosure of Invention

The embodiment of the application provides a random access method and a random access device, which can enable a terminal device which is configured with one PUL and at least one SUL and is in a connection state to determine an uplink carrier initiating random access so as to complete random access.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect, a random access method is provided, where the random access method is applied to a chip in a terminal device that is in a connected state and configured with at least two uplink carriers or the terminal device. Specifically, after receiving first information, sent by the access network device, for determining at least one uplink carrier having a random access resource among the at least two uplink carriers, the terminal device (or a chip in the terminal device) determines an uplink carrier initiating a random access among the at least one uplink carrier having the random access resource, so that the terminal device (or the chip in the terminal device) may initiate the random access on the uplink carrier initiating the random access.

In this embodiment, the first information is used to determine that at least one uplink carrier of the random access resource exists in at least two uplink carriers configured by the terminal device (or a chip in the terminal device), so that the terminal device (or the chip in the terminal device) can determine the at least one uplink carrier of the random access resource according to the first information, and further determine, from the at least one uplink carrier of the random access resource, an uplink carrier that can initiate random access, so as to implement that the terminal device (or the chip in the terminal device) completes random access.

Optionally, in a possible implementation manner of the present application, the method for determining an uplink carrier initiating random access in at least one uplink carrier with random access resources includes: and receiving second information which is sent by access network equipment and used for indicating the uplink carrier initiating the random access, and determining the uplink carrier initiating the random access according to the second information.

The terminal device (or a chip in the terminal device) in the embodiment of the application determines the uplink carrier initiating the random access according to the indication of the access network device, thereby effectively improving the success rate of the random access and reducing the load imbalance in the communication system.

Optionally, in another possible implementation manner of the present application, the at least two uplink carriers include a first uplink carrier and N second uplink carriers, where N is greater than or equal to 1. In this scenario, if the at least one uplink carrier with the random access resource includes M second uplink carriers of N second uplink carriers, the uplink carrier initiating the random access is one of the M second uplink carriers, and N is greater than or equal to M and greater than or equal to 1; or, if the at least one uplink carrier with the random access resource includes a first uplink carrier, the uplink carrier initiating the random access is the first uplink carrier; or, the uplink carrier initiating the random access is an uplink carrier configured with a physical uplink control channel resource in at least one uplink carrier with a random access resource; or, the uplink carrier initiating the random access is an uplink carrier which is configured with the random access resource in the at least one uplink carrier with the random access resource and has the shortest distance from the current transmission time in the time domain; or, the uplink carrier initiating the random access is: and under the condition that the scheduling request fails to trigger the random access process, sending the uplink carrier where the resource used by the scheduling request is located in at least one uplink carrier with the random access resource.

The terminal device (or a chip in the terminal device) in the embodiment of the application can autonomously determine the uplink carrier initiating the random access, and can meet the requirement that the terminal device (or a chip in the terminal device) initiates the random access.

As can be seen from the above description, the terminal device (or a chip in the terminal device) in the embodiment of the present application may determine the uplink carrier initiating the random access according to the instruction of the access network device, or may autonomously determine the uplink carrier initiating the random access.

Optionally, in another possible implementation manner of the present application, the at least two uplink carriers include a first uplink carrier and N second uplink carriers, where N is greater than or equal to 1. In addition to the foregoing steps, the terminal device (or a chip in the terminal device) in this embodiment of the application also obtains the signal quality of the downlink reference signal sent by the access network device. Thus, if the signal quality of the downlink reference signal is less than the signal quality threshold, the at least one uplink carrier with the random access resource includes M second uplink carriers of N second uplink carriers, the uplink carrier initiating the random access is one of the M second uplink carriers, N is greater than or equal to M greater than or equal to 1, and the signal quality threshold is received from the access network device.

Optionally, in another possible implementation manner of the present application, the at least two uplink carriers include a first uplink carrier and N second uplink carriers, where N is greater than or equal to 1. In addition to the foregoing steps, the terminal device (or a chip in the terminal device) in this embodiment of the application also obtains the signal quality of the downlink reference signal sent by the access network device. Thus, in scenarios where the signal quality of the downlink reference signal is greater than or equal to the signal quality threshold: if the at least one uplink carrier with the random access resource comprises a first uplink carrier, the uplink carrier initiating the random access is the first uplink carrier; or, the uplink carrier initiating the random access is an uplink carrier configured with a physical uplink control channel resource in the at least one uplink carrier with the random access resource; or, the uplink carrier initiating the random access is an uplink carrier which is configured with the random access resource in the at least one uplink carrier with the random access resource and has the shortest distance from the current transmission time in the time domain; or, the uplink carrier initiating the random access is an uplink carrier where a resource used by the scheduling request is sent from the at least one uplink carrier with the random access resource under the condition that the scheduling request fails to trigger the random access process.

It can be seen that, in the embodiment of the present application, the terminal device (or a chip in the terminal device) may further determine the uplink carrier initiating the random access by determining a size relationship between the signal quality of the downlink reference signal and a signal quality threshold.

There are various methods for determining, by a terminal device (or a chip in the terminal device), an uplink carrier initiating random access in this embodiment of the present application, which is not specifically limited in this embodiment of the present application.

Optionally, in another possible implementation manner of the present application, before determining the uplink carrier initiating the random access in the at least one uplink carrier with the random access resource, the terminal device (or a chip in the terminal device) further receives third information, which is sent by the access network device and used for triggering a random access process.

The terminal device (or a chip in the terminal device) in the embodiment of the present application may initiate random access according to an instruction of the access network device, or may initiate random access according to a self-requirement, which is not specifically limited in the embodiment of the present application.

Optionally, in another possible implementation manner of the present application, the third information is a physical downlink control channel command, the physical downlink control channel command includes at least one of fourth information and fifth information, the fourth information includes search space position information configured by the access Network device for scheduling information of each uplink carrier in the at least one uplink carrier with the random access resource, and the fifth information includes a Radio Network Temporary Identifier (RNTI) configured by the access Network device for each uplink carrier in the at least one uplink carrier with the random access resource.

In a scenario where the third information is a physical downlink control channel command, and the physical downlink control channel command includes at least one of the fourth information and the fifth information, the terminal device (or a chip in the terminal device) may determine, according to at least one of the fourth information and the fifth information, an uplink carrier initiating random access in the at least one uplink carrier with the random access resource. In this way, the terminal device (or the chip in the terminal device) directly initiates random access on the uplink carrier which is determined by the terminal device (or the chip in the terminal device) and which initiates random access according to the third information.

In combination with the aforementioned "determining the uplink carrier initiating the random access according to the second information", it can be known that the access network device in the embodiment of the present application may send information for determining the uplink carrier initiating the random access to the terminal device (or a chip in the terminal device) in different manners.

Optionally, in another possible implementation manner of the present application, after determining the uplink carrier initiating the random access in the "at least one uplink carrier with the random access resource", the terminal device (or a chip in the terminal device) further determines a currently activated subband in the uplink carrier initiating the random access, and if the currently activated subband is not a preset subband, the terminal device (or the chip in the terminal device) switches the currently activated subband to the preset subband. In this scenario, the method of initiating random access on an uplink carrier initiating random access includes: and initiating random access on the uplink carrier initiating the random access through random access resources in a preset sub-band. In some literature, subbands are also called wideband parts (BWP)

A subband in this embodiment refers to a series of consecutive physical resource blocks or resource blocks in a carrier. The preset sub-band is a sub-band which is configured with random access resources in advance in an uplink carrier with the random access resources in the communication system. Existing standard protocols specify: and the terminal equipment adopts the resources in the currently activated sub-band in the carrier wave to transmit data. The currently activated subband in a certain carrier is not necessarily a preset subband. When the currently activated sub-band in the uplink carrier initiating the random access is not the preset sub-band, the terminal device (or a chip in the terminal device) switches the currently activated sub-band in the uplink carrier initiating the random access to the preset sub-band, thereby improving the success rate of the random access.

Optionally, in another possible implementation manner of the present application, the terminal device (or a chip in the terminal device) is further configured with a first counter, where the first counter is used to record the number of times of re-initiating the random access; or the terminal device (or a chip in the terminal device) configures a second counter for each uplink carrier in the at least one uplink carrier with the random access resource, where the second counter is used to record the number of times of re-initiating the random access on the corresponding uplink carrier.

Optionally, in another possible implementation manner of the present application, the terminal device (or a chip in the terminal device) is further configured with a third counter and a first preset power ramp step, where the third counter is configured to record a number of times of change of the transmission power when the random access is re-initiated, and a value of the transmission power changes based on the first preset power ramp step; or, the terminal device (or a chip in the terminal device) configures a fourth counter and a second preset power ramp step length for each uplink carrier in the at least one uplink carrier with the random access resource, where the fourth counter is used to record the number of changes of the transmission power when the random access is re-initiated on the corresponding uplink carrier, and the value of the transmission power is changed based on the second preset power ramp step length corresponding to the uplink carrier used for re-initiating the random access.

When the terminal device (or a chip in the terminal device) initiates random access on an uplink carrier initiating the random access in the embodiment of the present application, there may be a failure. When the random access initiated by the terminal device (or the chip in the terminal device) fails, the terminal device (or the chip in the terminal device) may re-initiate the random access on the uplink carrier initiating the random access, or may re-select an uplink carrier initiating the random access by using the random access method provided in the embodiment of the present application, and re-initiate the random access on the re-selected uplink carrier initiating the random access.

In a second aspect, a random access apparatus is provided, where the random access apparatus is a chip or a terminal device applied to a terminal device in a connected state and configured with at least two uplink carriers. Specifically, the random access apparatus includes a communication unit and a determination unit.

The functions implemented by the unit modules provided by the present application are specifically as follows:

the communication unit is configured to receive first information sent by an access network device, where the first information is used to determine at least one uplink carrier having a random access resource in at least two uplink carriers. The determining unit is configured to determine, according to the first information received by the communication unit, at least one uplink carrier with a random access resource, and determine, from the at least one uplink carrier with the random access resource, an uplink carrier initiating a random access. The communication unit is further configured to initiate random access on the uplink carrier determined by the determining unit to initiate random access.

Optionally, in a possible implementation manner of the present application, the communication unit is further configured to receive second information sent by the access network device, where the second information is used to indicate an uplink carrier initiating random access. The determining unit is specifically configured to determine, according to the second information received by the receiving unit, an uplink carrier initiating random access.

Optionally, in another possible implementation manner of the present application, the at least two uplink carriers include a first uplink carrier and N second uplink carriers, where N is greater than or equal to 1. In this scenario, the at least one uplink carrier with the random access resource includes M second uplink carriers of N second uplink carriers, the uplink carrier initiating the random access is one of the M second uplink carriers, and N is greater than or equal to M and greater than or equal to 1; or, the at least one uplink carrier with the random access resource includes a first uplink carrier, and the uplink carrier initiating the random access is the first uplink carrier; or, the uplink carrier initiating the random access is an uplink carrier configured with a physical uplink control channel resource in at least one uplink carrier with a random access resource; or, the uplink carrier initiating the random access is an uplink carrier which is configured with the random access resource in the at least one uplink carrier with the random access resource and has the shortest distance from the current transmission time in the time domain; or, the uplink carrier initiating the random access is an uplink carrier where a resource used by the scheduling request is sent from the at least one uplink carrier with the random access resource under the condition that the scheduling request fails to trigger the random access process.

Optionally, in another possible implementation manner of the present application, the at least two uplink carriers include a first uplink carrier and N second uplink carriers, where N is greater than or equal to 1. The random access device provided by the embodiment of the application further includes an obtaining unit, where the obtaining unit is configured to obtain the signal quality of the downlink reference signal sent by the access network device. If the signal quality of the downlink reference signal is less than the signal quality threshold, the at least one uplink carrier with the random access resource includes M second uplink carriers of N second uplink carriers, the uplink carrier initiating the random access is one of the M second uplink carriers, N is greater than or equal to M and greater than or equal to 1, and the signal quality threshold is received from the access network device.

Optionally, in another possible implementation manner of the present application, the at least two uplink carriers include a first uplink carrier and N second uplink carriers, where N is greater than or equal to 1. The random access device provided by the embodiment of the application further includes an obtaining unit, where the obtaining unit is configured to obtain the signal quality of the downlink reference signal sent by the access network device. When the signal quality of the downlink reference signal is greater than or equal to a signal quality threshold, the at least one uplink carrier with the random access resource comprises a first uplink carrier, and the uplink carrier initiating the random access is the first uplink carrier; or, the uplink carrier initiating the random access is an uplink carrier configured with a physical uplink control channel resource in at least one uplink carrier with a random access resource; or, the uplink carrier initiating the random access is an uplink carrier which is configured with the random access resource in the at least one uplink carrier with the random access resource and has the shortest distance from the current transmission time in the time domain; or, the uplink carrier initiating the random access is an uplink carrier where a resource used by the scheduling request is sent from the at least one uplink carrier with the random access resource under the condition that the scheduling request fails to trigger the random access process.

Optionally, in another possible implementation manner of the present application, the communication unit is further configured to receive third information sent by the access network device before the determining unit determines, from the at least one uplink carrier with the random access resource, an uplink carrier initiating the random access, where the third information is used to trigger a random access process.

Optionally, in another possible implementation manner of the present application, the third information is a physical downlink control channel command, the physical downlink control channel command includes at least one of fourth information and fifth information, the fourth information includes search space position information configured by the access network device for scheduling information of each uplink carrier in at least one uplink carrier with random access resources, and the fifth information includes an RNTI configured by the access network device for each uplink carrier in at least one uplink carrier with random access resources.

Optionally, in another possible implementation manner of the present application, the determining unit is further configured to determine a currently activated subband in an uplink carrier initiating random access after determining the uplink carrier initiating random access in at least one uplink carrier having a random access resource. Correspondingly, the random access apparatus provided in the embodiment of the present application further includes a switching unit, where the switching unit is configured to switch the currently activated subband to the preset subband if the currently activated subband determined by the determining unit is not the preset subband. Correspondingly, the communication unit is specifically configured to initiate random access on an uplink carrier initiating random access through the random access resource in the preset subband switched by the switching unit.

Optionally, in another possible implementation manner of the present application, the random access apparatus provided in this embodiment of the present application further includes a first configuration unit, where the first configuration unit is configured to configure a first counter, and the first counter is configured to record the number of times of re-initiating the random access, or is configured to configure a second counter for each uplink carrier in the at least one uplink carrier with the random access resource, and the second counter is configured to record the number of times of re-initiating the random access on a corresponding uplink carrier.

Optionally, in another possible implementation manner of the present application, the random access apparatus provided in the embodiment of the present application further includes a second configuration unit, the second configuration unit is used for configuring a third counter and a first preset power climbing step length, the third counter is used for recording the change times of the transmission power when the random access is restarted, the value of the transmission power is changed based on the first preset power climbing step length, or is configured to configure a fourth counter and a second preset power ramp step for each uplink carrier in the at least one uplink carrier with random access resources, the fourth counter is used for recording the change times of the sending power when the random access is restarted on the corresponding uplink carrier, and the value of the sending power is changed based on the second preset power climbing step length corresponding to the uplink carrier adopted by the random access restarting.

In a third aspect, a terminal device is provided, which includes: one or more processors, memory, a communication interface. Wherein the memory, communication interface are coupled with the one or more processors; the terminal device communicates with the access network device via a communication interface, the memory being adapted to store computer program code comprising instructions which, when executed by the one or more processors, cause the terminal device to perform a random access method as described above in relation to the first aspect and its various possible implementations.

In a fourth aspect, there is also provided a computer-readable storage medium having instructions stored therein; when run on a terminal device, causes the terminal device to perform a random access method as described above in the first aspect and its various possible implementations.

In a fifth aspect, there is also provided a computer program product containing instructions which, when run on a terminal device, cause the terminal device to perform the random access method as described in the first aspect and its various possible implementations.

In the present application, the names of the above-mentioned terminal devices do not limit the devices or the functional modules themselves, and in actual implementation, the devices or the functional modules may appear by other names. Insofar as the functions of the respective devices or functional modules are similar to those of the present application, they fall within the scope of the claims of the present application and their equivalents.

For a detailed description of the second, third, fourth, fifth and their various implementations in this application, reference may be made to the detailed description of the first aspect and its various implementations; moreover, the beneficial effects of the second aspect, the third aspect, the fourth aspect, the fifth aspect and various implementation manners thereof may refer to the beneficial effect analysis of the first aspect and various implementation manners thereof, and are not described herein again.

In a sixth aspect, a random access method is provided, where the random access method is applied to an access network device or a chip in the access network device. Specifically, an access network device (or a chip in the access network device) sends, to a terminal device, first information for determining that at least one uplink carrier with a random access resource exists in at least two uplink carriers, where the terminal device is in a connected state and configured with the at least two uplink carriers; the access network device (or a chip in the access network device) receives a random access request sent by the terminal device on an uplink carrier initiating random access in the at least one uplink carrier with random access resources.

The first information in this embodiment is used to determine that at least one uplink carrier of the random access resource exists in at least two uplink carriers configured by the terminal device, and the access network device (or a chip in the access network device) sends the first information to the terminal device, so that the terminal device can determine at least one uplink carrier of the random access resource according to the first information, and further determine an uplink carrier capable of initiating random access from the at least one uplink carrier of the random access resource, so as to implement that the terminal device completes random access.

Optionally, in a possible implementation manner of the present application, the access network device (or a chip in the access network device) further sends, to the terminal device, second information for indicating the uplink carrier initiating the random access.

Optionally, in another possible implementation manner of the present application, the access network device (or a chip in the access network device) further sends third information for triggering a random access procedure to the terminal device.

Optionally, in another possible implementation manner of the present application, the third information is a physical downlink control channel command, the physical downlink control channel command includes at least one of fourth information and fifth information, the fourth information includes search space position information configured by the access network device for scheduling information of each uplink carrier in the at least one uplink carrier with the random access resource, and the fifth information includes an RNTI configured by the access network device for each uplink carrier in the at least one uplink carrier with the random access resource.

A seventh aspect provides a random access device, where the random access device is an access network device or a chip in the access network device. Specifically, the random access device comprises a processing unit, a sending unit and a receiving unit.

the processing unit is configured to determine first information, where the first information is used to instruct a terminal device to determine at least one uplink carrier with a random access resource in at least two uplink carriers, and the terminal device is in a connected state and configured with the at least two uplink carriers. The sending unit is configured to send, to the terminal device, the first information determined by the processing unit, where the terminal device is in a connected state and is configured with at least two uplink carriers, and the first information is used to determine at least one uplink carrier having a random access resource in the at least two uplink carriers. The receiving unit is configured to receive a random access request sent by the terminal device on an uplink carrier initiating random access in the at least one uplink carrier with the random access resource.

Optionally, in a possible implementation manner of the present application, the sending unit is further configured to send second information to the terminal device, where the second information is used to indicate an uplink carrier initiating random access.

Optionally, in another possible implementation manner of the present application, the sending unit is further configured to send third information to the terminal device, where the third information is used to trigger a random access procedure.

Optionally, in another possible implementation manner of the present application, the third information is a physical downlink control channel command, where the physical downlink control channel command includes at least one of fourth information and fifth information, the fourth information includes search space position information configured by the access network device for scheduling information of each uplink carrier in at least one uplink carrier with random access resources, and the fifth information includes an RNTI configured by the access network device for each uplink carrier in at least one uplink carrier with random access resources.

In an eighth aspect, an access network device is provided, which includes: one or more processors, memory, a communication interface. Wherein the memory, communication interface are coupled with the one or more processors; the access network device communicates with the terminal device via a communication interface, the memory being adapted to store computer program code comprising instructions which, when executed by the one or more processors, cause the access network device to perform the random access method as described in the sixth aspect and its various possible implementations above.

In a ninth aspect, there is also provided a computer-readable storage medium having instructions stored therein; when running on an access network device, causes the access network device to perform a random access method as described in the above sixth aspect and its various possible implementations.

In a tenth aspect, there is also provided a computer program product containing instructions that, when run on an access network device, cause the access network device to perform the random access method according to the sixth aspect and its various possible implementations.

For a detailed description of the seventh aspect, the eighth aspect, the ninth aspect, the tenth aspect, and various implementations thereof in the present application, reference may be made to the detailed description of the sixth aspect and various implementations thereof; moreover, for the beneficial effects of the seventh aspect, the eighth aspect, the ninth aspect, the tenth aspect and various implementation manners thereof, reference may be made to beneficial effect analysis in the sixth aspect and various implementation manners thereof, and details are not repeated here.

These and other aspects of the present application will be more readily apparent from the following description.

Drawings

Fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of another communication system according to an embodiment of the present application;

fig. 3 is a schematic diagram of a hardware structure of a smart phone according to an embodiment of the present application;

fig. 4 is a schematic hardware structure diagram of a base station according to an embodiment of the present disclosure;

fig. 5 is a first flowchart of a random access method according to an embodiment of the present application;

fig. 6 is a second flowchart of a random access method according to an embodiment of the present application;

fig. 7 is a third flowchart of a random access method according to an embodiment of the present application;

fig. 8 is a fourth flowchart of a random access method according to an embodiment of the present application;

fig. 9 is a fifth flowchart of a random access method according to an embodiment of the present application;

fig. 10 is a first schematic structural diagram of a random access apparatus according to an embodiment of the present application;

fig. 11 is a second schematic structural diagram of a random access apparatus according to an embodiment of the present application;

fig. 12 is a third schematic structural diagram of a random access apparatus according to an embodiment of the present application;

fig. 13 is a fourth schematic structural diagram of a random access apparatus according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a random access apparatus according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of an access network device according to an embodiment of the present application.

Detailed Description

In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

The terms "first" and "second," and the like, in the description and in the claims of the present application, are used for distinguishing between different objects and not for describing a particular order of the objects. For example, the first information, the second information, and the like are used to distinguish different data blocks, and are not used to describe a specific order of the data blocks.

In the existing communication system, in order to save power consumption of the terminal device as much as possible, a plurality of communication states are defined for the terminal device. For example, if a terminal device establishes a communication connection with a base station, the terminal device is defined to be in a Connected (Connected) state (or Connected mode). If the terminal device is in the standby state, the terminal device is defined to be in an Idle (Idle) state (or Idle mode).

In the 5G system, a high frequency resource is used between the base station and the terminal device to complete service communication, i.e., the carrier used for transmitting data between the base station and the terminal device is a high frequency carrier. Generally, the transmission power of the terminal device is low, so that in the 5G system, when the terminal device is in a cell edge region and transmits a signal to the base station, the base station may not receive the signal transmitted by the terminal device because a high frequency signal has a large transmission loss and a weak penetration capability during transmission, but the terminal device may receive a signal transmitted by the base station through a high frequency downlink. This presents the problem of asymmetrical uplink and downlink coverage.

In order to solve the problem of asymmetric uplink and downlink coverage, a terminal device in a 5G system is configured with one PUL and at least one SUL in a certain cell, and a frequency band to which the SUL belongs is smaller than a frequency band to which the PUL belongs. The SUL is used for assisting the terminal device to transmit uplink data. When the terminal equipment sends the uplink data to the base station by adopting the same transmitting power, the transmission distance when the uplink data is sent on the PUL is longer than that when the uplink data is sent on the SUL.

It should be noted that the two names of the PUL and the SUL in the present application are only used for distinguishing the original high frequency band uplink carrier from the introduced low frequency band uplink carrier, and the names of the PUL and the SUL may change with the evolution of the communication technology, and the embodiments of the present application are not specifically limited herein.

In a scenario where a terminal device is configured with one PUL and at least one SUL in a certain cell, the terminal device in the Idle state may determine, in the PUL and the at least one SUL, an uplink carrier initiating random access by determining a size relationship between an RSRP of a downlink reference signal and a preset RSRP threshold.

Exemplarily, as shown in fig. 1, the communication system includes a base station, a terminal device 1, and a terminal device 2, where the base station provides services for both the terminal device 1 and the terminal device 2, and the terminal device 1 and the terminal device 2 are located in a certain cell corresponding to the base station, both configured with one PUL and one SUL, and both in an Idle state. If the terminal device 1 determines that the RSRP of the downlink reference signal is greater than or equal to the preset RSRP threshold, it indicates that the terminal device 1 is located in the central area of the cell, and at this time, the terminal device 1 may select the PUL to initiate random access. If the terminal device 2 determines that the RSRP of the downlink reference signal is smaller than the preset RSRP threshold, it indicates that the terminal device 2 is located in the edge area of the cell, and the terminal device 2 may select the SUL to initiate random access.

In view of the foregoing problems, an embodiment of the present application provides a random access method, where the random access method is applied to a chip in a terminal device that is in a connected state and configured with at least two uplink carriers or the terminal device. After receiving first information sent by the access network device and used for determining at least one uplink carrier with random access resources in the at least two uplink carriers, the terminal device (or a chip in the terminal device) determines the uplink carrier initiating random access in the at least one uplink carrier with random access resources, so that the terminal device (or the chip in the terminal device) can initiate random access on the uplink carrier initiating random access.

The random access method provided by the embodiment of the application is suitable for a communication system. The communication system may be a 5G system, an LTE system, or another communication system in which at least two uplink carriers are configured for a terminal device, and this is not particularly limited in this embodiment of the present application.

Fig. 2 is a schematic structural diagram of a communication system according to an embodiment of the present application. Referring to fig. 2, the communication system includes a plurality of terminal devices and an access network device 21, and data transmission between each terminal device and the access network device 21 may be performed by radio waves, or may be performed by visible light, laser, infrared, optical quantum, power lines, optical fibers, coaxial cables, copper strands, and the like. Each terminal device is configured with at least two uplink carriers, e.g., the at least two uplink carriers include one PUL and at least one SUL.

Fig. 2 shows 6 terminal devices, which are terminal device 1, terminal device 2, terminal device 3, terminal device 4, terminal device 5, and terminal device 6, respectively. Terminal Device 4, terminal Device 5, and terminal Device 6 in fig. 2 also form a Device-to-Device (D2D) communication system, and terminal Device 4 and terminal Device 6 each communicate with access network Device 21 via terminal Device 5.

The terminal device in the embodiment of the present application may refer to a wireless terminal device capable of receiving the scheduling information and the indication information sent by the access network device 21. A wireless terminal device may refer to a device that provides voice and/or data connectivity to a user, a handheld device having wireless connection capability, or other processing device connected to a wireless modem. For example, the wireless terminal device is an MTU UE.

A wireless terminal device may communicate with one or more core networks via a Radio Access Network (e.g., RAN). The wireless terminal devices may be mobile terminal devices, such as mobile phones (or "cellular" phones) and computers with mobile terminal devices, as well as portable, pocket, hand-held, computer-included, or vehicle-mounted mobile devices that exchange language and/or data with a wireless access network, such as cell phones, tablets, laptops, netbooks, Personal Digital Assistants (PDAs). The wireless terminal device may also be referred to as a terminal device.

For example, in the embodiment of the present application, the terminal device shown in fig. 2 may be a smart phone, and details of each component of the smart phone are described below with reference to fig. 3.

As shown in fig. 3, the smart phone includes: a processor 31, a Radio Frequency (RF) circuit 32, a power supply 33, a memory 34, an input unit 35, a display unit 36, an audio circuit 37, and the like.

Those skilled in the art will appreciate that the structure of the smartphone shown in fig. 3 does not constitute a limitation of the smartphone, and may include more or fewer components than those shown in fig. 3, or may combine some of the components shown in fig. 3, or may be arranged differently than those shown in fig. 3.

The processor 31 is a control center of the smartphone, connects various parts of the entire smartphone by using various interfaces and lines, and executes various functions of the smartphone and processes data by running or executing software programs and/or modules stored in the memory 34 and calling data stored in the memory 34, thereby integrally monitoring the smartphone. Alternatively, the processor 31 may comprise one or more processing units. The processor 31 may integrate an application processor and a modem processor. The application processor mainly processes an operating system, a user interface, an application program and the like; the modem processor handles primarily wireless communications. Optionally, the application processor and the modem processor may be independent from each other, or may be integrated in the same device.

The RF circuit 32 may be used for receiving and transmitting signals during information transmission and reception or during a call, and in particular, receives downlink information of a base station and then processes the received downlink information to the processor 31; in addition, the uplink data is transmitted to the base station. Typically, the RF circuitry includes, but is not limited to, an antenna, at least one Amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In addition, the RF circuitry 32 may also communicate with networks and other devices via wireless communications. The wireless Communication may use any Communication standard or protocol, including but not limited to Global System for Mobile Communication (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), LTE, e-mail, Short Messaging Service (SMS), and the like.

The smartphone includes a power supply 33 (e.g., a battery) for supplying power to various components, and optionally, the power supply may be logically connected to the processor 31 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system.

The memory 34 may be used to store software programs and modules, and the processor 31 executes various functional applications and data processing of the smart phone by running the software programs and modules stored in the memory 34.

The memory 34 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function (such as initiating random access), and the like; the storage data area may store data (such as audio data, a phonebook) created according to the use of the smartphone, and the like. Further, the memory 34 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The input unit 35 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the smartphone. Specifically, the input unit 35 may include a touch screen 351 and other input devices 352.

The touch screen 351, also referred to as a touch panel, may collect touch operations of a user (e.g., operations of the user on or near the touch screen 351 using any suitable object or accessory such as a finger or a stylus) and drive the corresponding connection device according to a preset program. Alternatively, the touch screen 351 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 31, and can receive and execute commands sent by the processor 31. In addition, the touch screen 351 may be implemented using various types, such as resistive, capacitive, infrared, and surface acoustic wave.

The display unit 36 may be used to display information input by or provided to the user and various menus of the smartphone. The Display unit 36 may include a Display panel 361, and optionally, the Display panel 361 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-emitting Diode (OLED), or the like.

Further, the touch screen 351 may overlay the display panel 361, and when the touch screen 351 detects a touch operation on or near the touch screen 351, the touch screen is transmitted to the processor 31 to determine the type of the touch event, and then the processor 3 provides a corresponding visual output on the display panel 361 according to the type of the touch event. Although in fig. 3 the touch screen 351 and the display panel 361 are shown as two separate components to implement the input and output functions of the smartphone, in some embodiments the touch screen 351 and the display panel 361 may be integrated to implement the input and output functions of the smartphone.

Audio circuitry 37, a speaker 371, and a microphone 372 for providing an audio interface between the user and the smartphone. The audio circuit 37 can transmit the electrical signal converted from the received audio data to the speaker 371, and the electrical signal is converted into a sound signal by the speaker 371 and then output; on the other hand, the microphone 372 converts the collected sound signals into electrical signals, which are received by the audio circuit 37 and converted into audio data, which are output to the RF circuit 32 for transmission to, for example, another smartphone or to the memory 34 for further processing.

Optionally, the smart phone may further include various sensors (such as a gyroscope sensor, a hygrometer sensor, an infrared sensor, or a magnetometer sensor), a Wi-Fi module, a bluetooth module, a housing, and the like. Not shown in fig. 3.

The access network device 21 in the embodiment of the present application communicates with each terminal device. The Access network device 21 is a device having a central control function, such as a base station, a hotspot (pico), a Transmission Point (TP), a Relay (Relay), an Access Point (AP), and the like. The Base Station may be a Base Station (BS) or a Base Station controller for wireless communication.

Specifically, the access network device 21 is a device deployed in a radio access network to provide a wireless communication function for a terminal device, and may be connected to the terminal device, receive data sent by the terminal device, and send the data to a core network device.

The main functions of the access network equipment include one or more of the following: management of radio resources, compression of Internet Protocol (IP) headers and encryption of user data streams, selection of Mobility Management Entity (MME) when a terminal device is attached, routing of user plane data to Serving Gateway (SGW), organization and transmission of paging messages, organization and transmission of broadcast messages, configuration of measurement and measurement reports for Mobility or scheduling, and the like.

In systems employing different radio access technologies, the name of the access network device 21 may vary. For example: in an LTE network (or referred to as the 4 th Generation telecommunications, 4G) system, the name of the access network equipment 21 is evolved NodeB (eNB or eNodeB); in the 3 rd Generation mobile communication technology (3G) system, the name of the access network device 21 is a base station (Node B); in a next generation wireless communication system (e.g., 5G system), the access network device 21 is named gNB; in the wireless local Access system, the Access network device 21 is called an Access point (Access point). This name may change as communication technology evolves. Furthermore, the access network device 21 may be other means for providing wireless communication functions for the terminal device, where possible. For convenience of description, in the embodiments of the present application, a device that provides a wireless communication function for a terminal device is referred to as an access network device.

For example, in the embodiment of the present application, the access network device 21 shown in fig. 2 may be a base station, and each constituent component of the base station is specifically described below with reference to fig. 4.

As shown in fig. 4, the base station includes: the Remote Radio Unit comprises a Base Band Unit (BBU), a Radio Remote Unit (RRU) and an antenna, wherein the BBU and the RRU can be connected by optical fibers, the RRU is connected to the antenna by a coaxial cable and a power divider (coupler), and generally one BBU can be connected with a plurality of RRUs.

The RRU may include 4 modules: the digital intermediate frequency module, the transceiver module, the power amplifier module and the filter module. The digital intermediate frequency module is used for modulation and demodulation, digital up-down frequency conversion, digital-to-analog conversion and the like of optical transmission; the transceiver module completes the conversion from the intermediate frequency signal to the radio frequency signal; and after the radio frequency signal is amplified by the power amplification module and filtered by the filtering module, the radio frequency signal is transmitted out through an antenna.

The BBU is used to perform baseband processing functions (coding, multiplexing, modulation, spreading, etc.) of a Uu interface (i.e., an interface between a terminal device and a base station), interface functions of a logic interface between a Radio Network Controller (RNC) and the base station, signaling processing, local and remote operation and maintenance functions, and a working state monitoring and alarm information reporting function of a base station system.

The random access method provided by the present application will be described in detail below.

Fig. 5 is a flowchart illustrating a random access method according to an embodiment of the present application, where the random access method may be applied to the communication system shown in fig. 2. As shown in fig. 5, in the random access method provided in the embodiment of the present application, S500 and S501 are executed by the access network device 21 shown in fig. 2, and may specifically be executed by a processor in the access network device 21. In addition, S502 and S503 are executed by the terminal device shown in fig. 2, and may be specifically executed by a processor in the terminal device. In practical applications, both the processor in the access network device and the processor in the terminal device may exist in the form of chips. The terminal device in the embodiment of the present application is configured with at least two uplink carriers in one cell. For convenience of description, the terminal devices referred to in the following are used to indicate terminal devices configured with at least two uplink carriers in one cell.

For convenience of description, the embodiments of the present application all use a terminal device and an access network device as examples for explanation.

Referring to fig. 5, the random access method includes the following steps.

S500, the access network equipment sends first information to the terminal equipment, and the first information is used for determining at least one uplink carrier with random access resources in at least two uplink carriers.

Optionally, the access network device sends the first information through Radio Resource Control (RRC) signaling, and may also send the first information through other high-level signaling, which is not specifically limited in this embodiment of the present application.

In a first implementation manner, the first information in this embodiment may include time domain information of the random access resource and frequency domain information of the random access resource.

In this scenario, the terminal device may determine, based on the at least two configured uplink carriers, an uplink carrier having the random access resource in the at least two uplink carriers according to the time domain information of the random access resource and the frequency domain information of the random access resource.

In a second implementation manner, the first information in this embodiment may include time domain information of the random access resource, frequency domain information of the random access resource, and an identifier of some uplink carriers in the at least two uplink carriers.

In this scenario, the terminal device may directly determine, according to the identifier of some uplink carriers of the at least two uplink carriers included in the first information, an uplink carrier with a random access resource in the at least two uplink carriers.

In addition to the above description, the first information in this embodiment may also be at least one other uplink carrier that can be used to determine that there is a random access resource in at least two uplink carriers, which is not specifically limited in this embodiment of the present application.

S501, the access network equipment sends second information to the terminal equipment, and the second information is used for indicating an uplink carrier initiating random access.

Specifically, the access network device determines an uplink carrier that can be used for initiating random access according to a load of each uplink carrier in the at least one uplink carrier with the random access resource, and sends second information to the terminal device, where the second information is used to indicate the uplink carrier that initiates random access.

Optionally, the second information is a number of the uplink carrier initiating the random access in at least two uplink carriers, and may also be other identifiers that can be used to indicate the uplink carrier initiating the random access, which is not specifically limited in this embodiment of the present application.

In this embodiment, the access network device may send the second information to the terminal device through the RRC configuration signaling, and may send the second information to the terminal device through another RRC signaling.

And S502, the terminal equipment determines the uplink carrier initiating the random access according to the second information.

Optionally, in a case that the scheduling request of the terminal device fails, or in a case that the terminal device does not have available resources for the scheduling request, the terminal device triggers to initiate the random access procedure.

It should be noted that the terminal device in the embodiment of the present application may also trigger to initiate the random access process under other conditions, which is not specifically limited in the embodiment of the present application.

In a scenario that a terminal device needs to initiate random access, the terminal device needs to determine an uplink carrier initiating random access. The second information is used for indicating the uplink carrier initiating the random access, so that the terminal equipment can directly determine the uplink carrier initiating the random access according to the second information after receiving the second information sent by the access network equipment.

S503, the terminal equipment initiates random access on the determined uplink carrier initiating the random access.

In S502, the terminal device determines the uplink carrier initiating the random access, so that the terminal device directly initiates the random access on the determined uplink carrier initiating the random access. Specifically, the terminal device sends a random access request including a preamble sequence (preamble) to the access network device on the determined uplink carrier initiating the random access. Correspondingly, the access network device sends a corresponding random access response to the terminal device.

Currently, one carrier is configured with four sub-bands, which are also called bwp (bandwidth part) in some documents. Only one of the four subbands in a carrier may be activated at a time. A sub-band is composed of a series of consecutive Resource Blocks (RBs) or Physical Resource Blocks (PRBs). Provision in NR: and the terminal equipment adopts the resources in the currently activated sub-band in the carrier wave to transmit data.

However, the currently activated subband in a carrier does not necessarily have resources. In order to ensure that the terminal device can successfully complete random access, in the embodiment of the present application, the BWP pre-configured with resources in a carrier with random access resources in the communication system is collectively referred to as a preset BWP. For example: the preset BWP is the initial BWP (initial BWP), the default BWP (default BWP) or the cell-defined BWP (cell defining BWP). Thus, the terminal device can complete random access on the uplink carrier initiating random access through the random access resource in the preset BWP.

It should be noted that BWP is only one expression of the name of the sub-band. This name of BWP may change as the communication technology evolves, and the embodiment of the present application is not particularly limited in this respect.

Specifically, after determining the uplink carrier initiating random access, the terminal device determines a currently activated sub-band in the uplink carrier initiating random access; the terminal equipment judges whether the currently activated sub-band in the uplink carrier initiating the random access is a preset sub-band in the uplink carrier initiating the random access; if the currently activated subband in the uplink carrier initiating random access is not the preset subband in the uplink carrier initiating random access, the terminal equipment switches the currently activated subband in the uplink carrier initiating random access to the preset subband in the uplink carrier initiating random access, and initiates random access on the uplink carrier initiating random access through a random access resource in the preset subband in the uplink carrier initiating random access; if the currently activated subband in the uplink carrier initiating the random access is a preset subband in the uplink carrier initiating the random access, the terminal equipment initiates the random access on the uplink carrier initiating the random access through the random access resource in the currently activated subband in the uplink carrier initiating the random access.

The terminal device in this embodiment determines the uplink carrier initiating the random access according to the indication of the access network device, and initiates the random access on the uplink carrier initiating the random access, thereby implementing flexible scheduling of the random access resource and avoiding the situation of unbalanced load of the communication system.

In the random access method provided by the application, the terminal device can determine the uplink carrier initiating the random access according to the indication of the access network device, and can also autonomously determine the uplink carrier initiating the random access according to the requirement. The embodiment shown in fig. 5 describes a process in which the terminal device determines an uplink carrier initiating random access according to an instruction of the access network device. The process of autonomously determining the uplink carrier initiating the random access to the terminal equipment according to the requirement is carried out.

As shown in fig. 6, in the random access method provided in this embodiment of the application, S600 is executed by the access network device 21 shown in fig. 2, and specifically may be executed by a processor in the access network device 21. In addition, S601, S602, and S603 are executed by the terminal device shown in fig. 2, and may be specifically executed by a processor in the terminal device.

Referring to fig. 6, a random access method provided in an embodiment of the present application includes the following steps.

S600, the access network equipment sends first information to the terminal equipment, wherein the first information is used for determining at least one uplink carrier with random access resources in at least two uplink carriers.

S600 may refer to S500 described above, and details thereof are not repeated here.

S601, the terminal equipment determines the at least one uplink carrier with the random access resource according to the first information.

S602, the terminal equipment determines the uplink carrier initiating the random access in the at least one uplink carrier with the random access resource.

In a scene that the terminal equipment needs to initiate random access, the terminal equipment autonomously determines an uplink carrier initiating the random access in the at least one uplink carrier with the random access resource.

In the embodiment of the application, the at least two uplink carriers include a first uplink carrier and N second uplink carriers, and N is greater than or equal to 1. Here, the first uplink carrier may be the PUL, and the second uplink carrier may be the SUL. In this case, the method for the terminal device to autonomously determine the uplink carrier initiating the random access in the at least one uplink carrier with the random access resource may be any one of the following methods:

A. and the terminal equipment selects one of the M second uplink carriers and determines the selected second uplink carrier as the uplink carrier initiating the random access.

The at least one uplink carrier with the random access resource includes M second uplink carriers of the N second uplink carriers.

B. And under the condition that the at least one uplink carrier with the random access resource comprises a first uplink carrier, the terminal equipment determines the first uplink carrier as the uplink carrier initiating the random access.

C. And the terminal equipment determines the uplink carrier configured with the physical uplink control channel resource in the at least one uplink carrier with the random access resource as the uplink carrier initiating the random access.

D. And the terminal equipment determines the uplink carrier which has the shortest distance from the configured random access resource to the current transmission time in the time domain in the at least one uplink carrier with the random access resource as the uplink carrier initiating the random access.

The terminal device in the embodiment of the present application may determine the Time difference based on a Transmission Time Interval (TTI).

E. Under the condition that a Scheduling Request Failure (SR Failure) triggers a random access process, the terminal device determines an uplink carrier where a resource used for transmitting the Scheduling Request is located in the at least one uplink carrier with the random access resource as an uplink carrier initiating the random access.

S603, the terminal equipment initiates random access on the determined uplink carrier initiating the random access.

S603 refers to the description of S503, which is not described in detail here.

The terminal device in this embodiment autonomously determines an uplink carrier initiating random access according to its own requirement, and initiates a random access request on the determined uplink carrier initiating the random access request.

In addition to the random access method shown in fig. 6, the access network device in this embodiment may send a signal quality threshold to the terminal device, so that the terminal device may determine, by determining a size relationship between the signal quality of the downlink reference signal and the signal quality threshold, an uplink carrier initiating the random access in the at least one uplink carrier having the random access resource.

As shown in fig. 7, in the random access method provided in the embodiment of the present application, S700, S701, and S702 are executed by the access network device 21 shown in fig. 2, and may specifically be executed by a processor in the access network device 21. In addition, S703, S704, and S705 are executed by the terminal device shown in fig. 2, and may be specifically executed by a processor in the terminal device.

Specifically, as shown in fig. 7, the random access method provided in the embodiment of the present application includes the following steps.

S700, the access network equipment sends the signal quality threshold to the terminal equipment.

The access network equipment configures a signal quality threshold and sends the configured signal quality threshold to the terminal equipment through RRC configuration signaling or RRC reconfiguration signaling.

Optionally, the access network device may send the signal quality threshold to the terminal device periodically or periodically, or may determine the signal quality threshold in real time according to the loads of at least two uplink carriers, and send the signal quality threshold after the change to the terminal device when the signal quality threshold changes, which is not specifically limited in this embodiment of the present application.

The signal quality in the embodiment of the present application may be measured by RSRP, may also be measured by signal strength, and other parameters capable of representing signal strength are measured, which is not specifically limited in the embodiment of the present application.

S701, the access network equipment sends a downlink reference signal to the terminal equipment.

S702, the access network equipment sends first information to the terminal equipment, wherein the first information is used for determining at least one uplink carrier with random access resources in at least two uplink carriers.

S702 can refer to S500 described above, and details are not repeated here.

The access network device may execute S700, S701, and S702 at the same time, or may execute S700 first, then execute S701, and finally execute S702, which is not specifically limited in this embodiment of the present application.

S703, the terminal device obtains the signal quality of the downlink reference signal.

Specifically, after acquiring the downlink reference signal, the terminal device measures the signal quality of the downlink reference signal.

Optionally, after receiving the downlink reference signal, the terminal device may periodically measure the signal quality of the downlink reference signal, may also measure the signal quality of the downlink reference signal at regular time, and may also measure the signal quality of the downlink reference signal when there is a need to initiate random access.

S704, the terminal equipment judges whether the signal quality of the downlink reference signal is greater than or equal to a signal quality threshold value.

The terminal device in this embodiment determines, according to the signal quality of the downlink reference signal and the size determination result of the signal quality threshold, an uplink carrier initiating random access from at least one uplink carrier having a random access resource. Specifically, if the signal quality of the downlink reference signal is less than the signal quality threshold, the terminal device executes S705; if the signal quality of the downlink reference signal is greater than or equal to the signal quality threshold, the terminal device performs S706a, or performs S706b, or performs S706c, or performs S706 d.

S705, the terminal device selects one of the M second uplink carriers, and determines the selected second uplink carrier as an uplink carrier initiating random access.

The at least one uplink carrier with the random access resource comprises M second uplink carriers in the N second uplink carriers.

S705 is the same as the uplink carrier method a for the terminal device to determine to initiate random access.

S706a, in case that the at least one uplink carrier with the random access resource includes a first uplink carrier, the terminal device determines that the first uplink carrier is an uplink carrier initiating a random access.

S706a is the same as the uplink carrier method B for the terminal device to determine to initiate random access.

S706b, the terminal device determines, as the uplink carrier initiating the random access, an uplink carrier configured with a physical uplink control channel resource in the at least one uplink carrier with the random access resource.

S706b is the same as the uplink carrier method C for the terminal device to determine to initiate random access.

S706c, the terminal device determines the uplink carrier with the random access resource configured in the at least one uplink carrier with the random access resource, whose time domain is the shortest from the current transmission time, as the uplink carrier initiating the random access.

S706c is the same as the uplink carrier method D for the terminal device to determine to initiate random access.

S706d, in case that the scheduling request fails to trigger the random access process, the terminal device determines, as the uplink carrier initiating the random access, an uplink carrier in which a resource used by the scheduling request is sent from the at least one uplink carrier with random access resources.

S706d is the same as the uplink carrier method E for the terminal device to determine to initiate random access.

And S707, the terminal equipment initiates random access on the determined uplink carrier initiating the random access.

S707 refers to S503, and details are not repeated here.

As can be seen from the embodiment shown in fig. 6 and the embodiment shown in fig. 7, the terminal device in the embodiment of the present application may flexibly select the uplink carrier initiating the random access in different manners, and initiate the random access on the determined uplink carrier initiating the random access.

The embodiments shown in fig. 5, fig. 6, and fig. 7 are all embodiments in which, after a terminal device has a requirement for initiating random access, the terminal device determines an uplink carrier for initiating random access. That is, the embodiments shown in fig. 5, fig. 6 and fig. 7 all trigger the random access procedure by the terminal device itself. The random access method provided by the embodiment of the application can send relevant information to the terminal equipment for the access network equipment in addition to the random access process triggered by the terminal equipment, so as to trigger the random access process.

As shown in fig. 8, in the random access method provided in this embodiment of the application, S800 and S801 are executed by the access network device 21 shown in fig. 2, and may specifically be executed by a processor in the access network device 21. In addition, S802 and S803 are executed by the terminal device shown in fig. 2, and may be specifically executed by a processor in the terminal device.

Specifically, as shown in fig. 8, the random access method provided in the embodiment of the present application includes the following steps.

S800, the access network equipment sends first information to the terminal equipment, wherein the first information is used for determining at least one uplink carrier with random access resources in at least two uplink carriers.

S800 may refer to S500 described above, and details are not repeated here.

S801, the access network device sends third information to the terminal device, wherein the third information is used for triggering a random access process.

Optionally, the third information may be RRC signaling or a physical downlink control channel command (e.g., PDCCH order), which is not specifically limited in this embodiment of the present application.

In a scenario where the third information is a physical downlink control channel command, the physical downlink control channel command includes at least one of the fourth information and the fifth information. The fourth information includes search space position information configured by the access network device for the scheduling information of each uplink carrier in the at least one uplink carrier with the random access resource, where the search space position information of the scheduling information of the uplink carrier may be start position information of a search space of the scheduling information of the uplink carrier. The fifth information includes RNTI configured by the access network device for each uplink carrier in the at least one uplink carrier with the random access resource.

S802, the terminal equipment determines the uplink carrier initiating the random access in the at least one uplink carrier with the random access resource.

If the third information in S801 is an RRC signaling, the terminal device may determine the uplink carrier initiating the random access by using the method for determining the uplink carrier initiating the random access in the embodiment shown in fig. 6, that is, refer to the description of S602 above.

If the third Information in S801 is the pdcch command, when the pdcch command includes the fourth Information, the terminal device obtains Downlink Control Information (DCI) corresponding to a certain uplink carrier from the random access resource corresponding to the starting position of the search space indicated by the fourth Information. In this way, the terminal device can determine the uplink carrier corresponding to the search space position where the obtained DCI is located as the uplink carrier initiating the random access.

If the third information in S801 is the physical downlink control channel command, when the physical downlink control channel command includes the fifth information, the terminal device decodes the DCI in the random access resource according to the fifth information, so that the terminal device can obtain the DCI corresponding to a certain uplink carrier. After one piece of DCI is successfully decoded using the RNTI corresponding to a certain uplink carrier, the terminal device may determine the uplink carrier corresponding to the RNTI used for decoding as the uplink carrier initiating the random access.

And S803, responding to the third information, and initiating the random access by the terminal equipment on the determined uplink carrier wave for initiating the random access.

Since the third information is the random access initiated by the access network device, after receiving the third information, the terminal device responds to the third information and initiates the random access on the determined uplink carrier wave initiating the random access.

S803 may refer to the description of S503 above. The difference is that S503 is the random access triggered by the terminal device itself, and S803 is the random access triggered by the access network device through signaling indication of the terminal device.

Optionally, in the embodiment shown in fig. 8, before the terminal device determines the uplink carrier initiating the random access, the access network device may further send, to the terminal device, second information indicating the uplink carrier initiating the random access, so that the terminal device may directly determine the uplink carrier initiating the random access according to the second information.

With reference to fig. 8, as shown in fig. 9, the random access method provided in the embodiment of the present application further includes the following steps before S802.

S804 (optional), the access network device sends second information to the terminal device, where the second information is used to indicate an uplink carrier initiating random access.

S804 may refer to the description of S501, which is not described in detail here.

Since the second information in S804 is used to indicate the uplink carrier initiating the random access, in S802 of the embodiment shown in fig. 9, the terminal device directly determines the uplink carrier initiating the random access according to the second information, that is, the same as S502 described above, and details are not repeated here.

Since S804 is optional, it is indicated by a dotted line in fig. 9.

To sum up, the terminal device in the embodiment of the present application may trigger the random access according to the indication of the access network device, and may also trigger the random access according to the self-requirement. Meanwhile, the terminal equipment can determine the uplink carrier initiating the random access according to the indication of the access network equipment and can also autonomously determine the uplink carrier initiating the random access, thereby effectively improving the success rate of the random access, saving the system overhead and realizing the balance of the load in the system.

The foregoing embodiments all describe a process in which a terminal device initiates random access. In practical application, after the terminal device initiates random access, there is a possibility of random access failure. In a scenario of random access failure, the terminal device in the embodiment of the present application may reinitiate random access.

Optionally, the terminal device in this embodiment of the present application may be configured with a first counter, where the first counter is used to record the number of times that the terminal device re-initiates the random access.

Specifically, when the random access process initiated by the terminal device on the uplink carrier initiating the random access fails, the terminal device re-initiates the random access, and the value of the first counter is incremented by one until the value of the first counter reaches the maximum threshold of the first counter.

It should be noted that, in the present application, the uplink carrier used by the terminal device to initiate random access again may be the same as or different from the uplink carrier used by the terminal device to initiate random access last time. The uplink carrier used by the terminal device to reinitiate the random access may be determined according to the method shown in any one of the embodiments in fig. 5 to fig. 9, which is not specifically limited in this embodiment of the present application.

Optionally, in this embodiment of the application, each uplink carrier in the at least one uplink carrier with the random access resource is respectively configured with a second counter, where the second counter is used to record the number of times that the terminal device re-initiates the random access on the corresponding uplink carrier.

Specifically, in a first implementation manner, after the random access process initiated by the terminal device on the uplink carrier initiating the random access fails, the terminal device re-initiates the random access on the uplink carrier initiating the random access, and increments a value of a second counter corresponding to the uplink carrier initiating the random access by one until the value of the second counter corresponding to the uplink carrier initiating the random access reaches a maximum threshold of the second counter.

In a second implementation manner, in a scenario where the uplink carrier initiating the random access is specified by the access network device, after a random access process initiated by the terminal device on the uplink carrier initiating the random access fails, the terminal device re-initiates the random access on the uplink carrier initiating the random access, at this time, a value of a second counter corresponding to the uplink carrier initiating the random access is incremented by one until a value of the second counter corresponding to the uplink carrier initiating the random access reaches a maximum threshold of the second counter.

In a third implementation manner, after the random access process initiated by the terminal device on the uplink carrier initiating the random access fails, the terminal device re-initiates the random access, and at this time, the value of the second counter corresponding to the uplink carrier, on which the terminal device re-initiates the random access, is incremented by one. Each second counter is provided with a maximum threshold, and when the numerical value of the second counter of each uplink carrier in at least one uplink carrier of the random access resource reaches the respective maximum threshold, the number of times of initiating the random access by the terminal equipment reaches the maximum value. Here, the maximum threshold value of each second counter may be the same or different, and this is not specifically limited in this embodiment of the application.

Optionally, the terminal device in this embodiment of the present application is configured with a first counter, and each uplink carrier in the at least one uplink carrier with the random access resource is configured with a second counter, where the first counter is used to record the number of times that the terminal device re-initiates the random access, and the second counter is used to record the number of times that the terminal device re-initiates the random access on the corresponding uplink carrier.

Specifically, in a first implementation manner, after the random access process initiated by the terminal device on the uplink carrier initiating the random access fails, the terminal device re-initiates the random access on the uplink carrier initiating the random access, at this time, the value of the first counter is incremented by one, and the value of the second counter corresponding to the uplink carrier initiating the random access is incremented by one. The first counter is provided with a first maximum threshold value, a second counter corresponding to the uplink carrier initiating the random access is provided with a second maximum threshold value, and when the numerical value of the first counter reaches the first maximum threshold value and/or the numerical value of the second counter corresponding to the uplink carrier initiating the random access reaches the second maximum threshold value, the number of times of initiating the random access by the terminal equipment reaches the maximum value.

In a second implementation manner, in a scenario where the uplink carrier initiating the random access is specified by the access network device, after a random access process initiated by the terminal device on the uplink carrier initiating the random access fails, the terminal device re-initiates the random access on the uplink carrier initiating the random access, at this time, a value of the first counter is incremented by one, and a value of the second counter corresponding to the uplink carrier initiating the random access is incremented by one. The first counter is provided with a first maximum threshold value, a second counter corresponding to the uplink carrier initiating the random access is provided with a second maximum threshold value, and when the numerical value of the first counter reaches the first maximum threshold value and/or the numerical value of the second counter corresponding to the uplink carrier initiating the random access reaches the second maximum threshold value, the number of times of initiating the random access by the terminal equipment reaches the maximum value.

It should be noted that the foregoing description is only an example of the random access re-initiated by the terminal device in this embodiment, and is not a limitation to the random access re-initiated by the terminal device in this embodiment. Of course, in the process of the terminal device re-initiating the random access in the embodiment of the present application, the terminal device may also determine whether the random access needs to be re-initiated according to other manners.

In the process of re-initiating the random access, the terminal device in the embodiment of the present application may change the transmission power of the terminal device.

Optionally, the terminal device in this embodiment of the present application may be configured with a third counter and a first preset power ramp step, where the third counter is used to record the number of times of change of the transmission power when the terminal device re-initiates the random access, and a value of the transmission power of the terminal device changes based on the first preset power ramp step.

Specifically, in a first implementation manner, when the terminal device re-initiates the random access, the value of the third counter is incremented by one, and the transmission power of the terminal device changes according to the first preset power ramp step length. The third counter is provided with a maximum threshold, and when the value of the third counter reaches the maximum threshold, the transmission power of the terminal device is not changed any more. And when the value of the third counter is the maximum threshold value, the transmission power of the terminal equipment is the first transmission power. And after the value of the third counter reaches the maximum threshold value, if the terminal equipment also initiates random access again, the terminal equipment initiates random access according to the first transmission power.

In a second implementation manner, when the terminal device re-initiates random access, and an uplink carrier used for re-initiating random access is the same as an uplink carrier used for initiating random access last time, the value of the third counter is incremented by one, and the transmission power of the terminal device changes according to the first preset power ramp step length. The third counter is provided with a maximum threshold, and when the value of the third counter reaches the maximum threshold, the transmission power of the terminal device is not changed any more. And when the value of the third counter is the maximum threshold value, the transmission power of the terminal equipment is the first transmission power. And after the value of the third counter reaches the maximum threshold value, if the terminal equipment also initiates random access again, the terminal equipment initiates random access according to the first transmission power.

Optionally, in this embodiment of the present application, each uplink carrier in the at least one uplink carrier with the random access resource is configured with a fourth counter and a second preset power ramp step, where the fourth counter is used to record the number of times that the terminal device changes the transmission power when restarting the random access on the corresponding uplink carrier, and a value of the transmission power of the terminal device changes based on the second preset power ramp step corresponding to the uplink carrier used for restarting the random access.

The second preset power ramp step length configured for each uplink carrier in the at least one uplink carrier with the random access resource may be the same or different, and this is not specifically limited in this embodiment of the application.

Specifically, when the terminal device re-initiates random access, and an uplink carrier used for re-initiating random access is the same as an uplink carrier used for initiating random access last time, the value of the fourth counter is incremented by one, and the transmission power of the terminal device changes according to a second preset power ramp step corresponding to the uplink carrier. The fourth counter is provided with a maximum threshold, and when the value of the fourth counter reaches the maximum threshold, the transmission power of the terminal equipment is not changed any more. And when the value of the fourth counter is the maximum threshold value, the transmission power of the terminal equipment is the second transmission power. And after the value of the fourth counter reaches the maximum threshold value, if the terminal equipment also initiates random access on the uplink carrier again, the terminal equipment initiates random access according to the second sending power.

To sum up, after receiving first information sent by an access network device and used for determining at least one uplink carrier having a random access resource among the at least two uplink carriers, a terminal device in the embodiment of the present application determines an uplink carrier initiating a random access among the at least one uplink carrier having a random access resource, so that the terminal device can initiate a random access on the uplink carrier initiating the random access.

The embodiment of the present application provides a random access apparatus 100, where the random access apparatus 100 may be a chip applied to a terminal device in a connected state and configured with at least two uplink carriers or the terminal device. The random access apparatus 100 is configured to perform the steps performed by the terminal device in the above random access method. The random access apparatus 100 provided in the embodiment of the present application may include modules corresponding to the corresponding steps.

In the embodiment of the present application, the random access device 100 may be divided into functional modules according to the above method example, for example, each functional module may be divided according to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The division of the modules in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation.

Fig. 10 shows a schematic diagram of a possible structure of the random access apparatus 100 in a case where functional modules are divided according to respective functions. As shown in fig. 10, the random access apparatus 100 includes a communication unit 10 and a determination unit 11. The communication unit 10 is configured to support the random access apparatus 100 to perform S500, S501, and S503 in the embodiment shown in fig. 5, S600 and S603 in the embodiment shown in fig. 6, S700, S701, S702, and S707 in the embodiment shown in fig. 7, S800, S801, and S803 in the embodiment shown in fig. 8, S804 in the embodiment shown in fig. 9, and/or other processes for the technology described herein; the determining unit 71 is configured to support the random access apparatus 100 to perform S502 in the embodiment shown in fig. 5, S601 and S602 in the embodiment shown in fig. 6, S705, S706a, S706b, S706c and S706d in the embodiment shown in fig. 7, S802 in the embodiment shown in fig. 8, and/or other processes for the techniques described herein. All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

Furthermore, referring to fig. 10, as shown in fig. 11, the random access apparatus 100 further includes an obtaining unit 12, a switching unit 13, a first configuration unit 14, and a second configuration unit 15. The acquiring unit 12 is configured to support the random access apparatus 100 to perform S703 in the embodiment shown in fig. 7, and/or other processes for the technology described herein; a switching unit 13 is used to support switching of the random access apparatus 100 from a currently activated sub-band to a preset sub-band, and/or other processes for the techniques described herein; the first configuration unit 14 is used to support the random access device 100 to configure the first/second counters, and/or other processes for the techniques described herein; the second configuration unit 15 is used to support the random access device 100 to configure the third/fourth counters and/or other processes for the techniques described herein. Of course, the random access apparatus 100 provided in the embodiment of the present application includes, but is not limited to, the above modules, for example, the random access apparatus 100 may further include a storage unit. The memory unit may be adapted to store program codes of the random access apparatus 100.

In the case of an integrated unit, fig. 12 shows a schematic diagram of a possible structure of the random access apparatus 100 involved in the above embodiment.

As shown in fig. 12, the random access apparatus 100 includes: a processing module 1001 and a communication module 1002. The processing module 1001 is configured to control and manage the operation of the random access apparatus 100, for example, the processing module 1001 is configured to support the random access apparatus 100 to perform S502, S601, S602, S705, S706a, S706b, S706c, S706d, and S802 in the above method embodiments. The communication module 1002 is configured to support the random access apparatus 100 to communicate with an access network device, for example, the communication module 1002 is configured to support the random access apparatus 100 to perform S500, S501, S503, S600, S603, S700, S701, S702, S707, S800, S801, S803, and S804 in the foregoing method embodiments. The random access apparatus 100 may further include a storage module 1003, which may be used for storing program codes and data of the random access apparatus 100.

When the random access network device 100 is the terminal device shown in fig. 2 and fig. 3, the processing module 1001 may be the processor 31 in fig. 3, the communication module 1002 may be the antenna in fig. 3, and the storage module 1003 may be the memory 34 in fig. 3.

The embodiment of the present application further provides a terminal device 110, where the terminal device 110 is in a connected state and is configured with at least two uplink carriers. The terminal device 110 includes the random access apparatus 100 described above.

When the terminal device 110 operates, the terminal device 110 performs the random access method of the embodiment as shown in any one of fig. 5 to 9. For the random access method, reference may be made to the related description of any one of the embodiments shown in fig. 5 to fig. 9, which is not described herein again.

Another embodiment of the present application further provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are executed on the terminal device 110, the terminal device 110 performs the steps of the terminal device in the random access method according to the embodiment shown in any one of fig. 5 to 9.

In another embodiment of the present application, there is also provided a computer program product comprising computer executable instructions stored in a computer readable storage medium; the computer executable instructions may be read by at least one processor of terminal device 110 from a computer readable storage medium, and execution of the computer executable instructions by the at least one processor causes terminal device 110 to perform the steps of performing the terminal device in the random access method shown in any one of fig. 5 to 9.

The embodiment of the present application provides a random access apparatus 200, where the random access apparatus 200 may be an access network device or a chip in the access network device. The random access apparatus 200 is configured to perform the steps performed by the access network device in the above random access method. The random access apparatus 200 provided in the embodiment of the present application may include modules corresponding to the corresponding steps.

In the embodiment of the present application, the random access device 200 may be divided into functional modules according to the above method example, for example, each functional module may be divided according to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The division of the modules in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation.

Fig. 13 shows a possible structure diagram of the random access apparatus 200 in this embodiment, in a case where each functional module is divided according to each function. As shown in fig. 13, the random access apparatus 200 includes a processing unit 210, a transmitting unit 211, and a receiving unit 212. The processing unit 210 is used to support the random access device 200 to determine the first information, and/or other processes for the techniques described herein; the sending unit 211 is configured to support the random access apparatus 200 to perform S500 and S501 in the embodiment shown in fig. 5, S600 in the embodiment shown in fig. 6, S700, S701, and S702 in the embodiment shown in fig. 7, S800 and S801 in the embodiment shown in fig. 8, S804 in the embodiment shown in fig. 9, and/or other processes for the technology described herein; receiving unit 212 is used to support random access apparatus 200 to receive a random access request sent by a terminal device, and/or other processes for the techniques described herein. All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again. Of course, the random access apparatus 200 provided in the embodiment of the present application includes, but is not limited to, the above modules, for example, the random access apparatus 200 may further include the storage unit 213. The memory unit 213 may be used to store program codes and data of the random access apparatus 200.

In the case of an integrated unit, fig. 14 shows a possible structure diagram of the random access apparatus 200 involved in the above embodiment.

As shown in fig. 14, the random access apparatus 200 includes: a processing module 220 and a communication module 221. The processing module 220 is used for controlling and managing the actions of the random access apparatus 200, for example, the processing module 220 is used for supporting the random access apparatus 200 to execute S103 in the above method embodiment, and/or other processes for the technology described herein. The communication module 221 is configured to support the random access apparatus 200 to communicate with the terminal device, for example, the communication module 221 is configured to support the random access apparatus 200 to perform S100 and S102 in the above method embodiments. The random access device 200 may also include a storage module 222 that may be used to store program codes and data for the random access device 200.

The Processing module 220 may be a Processor or a controller, and may be, for example, a Central Processing Unit (CPU) or a Digital Signal Processor (DSP). Which may implement or execute the various illustrative logical blocks, modules, and circuits described in connection with the embodiment disclosure. The communication module 221 may be a communication interface, a transceiver circuit, a communication interface, or the like. The storage module 222 may be a memory.

The embodiment of the present application further provides an access network device 300, where the access network device 300 includes the random access apparatus 200 described above. As shown in fig. 15, the access network device 300 includes: a communication interface 230, a processor 231, and a memory 232. The communication interface 230, the processor 231 and the memory 232 are connected by a system bus 233, and perform communication with each other.

When the access network device 300 operates, the access network device 300 performs the random access method according to the embodiment shown in any one of fig. 5 to 9. For a specific random access method, reference may be made to the related description in the embodiments shown in any one of fig. 5 to 9, which is not described herein again.

Wherein the communication interface 230 is used for communicating with other devices or communication networks, such as ethernet, WLAN, etc.

The memory 232 is used for storing software programs and application modules, and the processor 231 executes various functional applications and data processing of the access network device 300 by running the software programs and application modules stored in the memory 232.

The memory 232 may mainly include a storage program area 2320, wherein the storage program area 2320 may store an operating system, an application program required for at least one function, such as sending instruction information, and the like.

The Memory 232 may be a Read-Only Memory (ROM), or other types of static storage devices that can store static information and instructions, a Random Access Memory (RAM), or other types of dynamic storage devices that can store information and instructions, or an Electrically Erasable Programmable Read-Only Memory (EEPROM), a magnetic disk storage medium, or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by the terminal device, but is not limited thereto.

The memory 232 may be separate and coupled to the processor 231 by a system bus 233. The memory 232 may also be integrated with the processor 231.

Processor 231 is the control center of access network device 300. The processor 231 connects various portions of the entire access network device 300 using various interfaces and lines, performs various functions of the access network device 300 and processes data by running or executing software programs and/or application modules stored in the memory 232 and calling up the data stored in the memory 232, thereby performing overall monitoring of the access network device 300.

In particular implementations, processor 231 may include one or more CPUs, for example, processor 231 in fig. 15 includes CPU 0 and CPU 1, as an embodiment.

The system bus 233 may be divided into an address bus, a data bus, a control bus, and the like. For clarity of illustration in the embodiments of the present invention, various buses are illustrated in FIG. 15 as system bus 233.

Another embodiment of the present application further provides a computer-readable storage medium including one or more program codes, where the one or more programs include instructions, and when a processor in the access network device 300 executes the program codes, the access network device 300 executes the random access method as shown in any one of fig. 5 to 9.

In another embodiment of the present application, there is also provided a computer program product comprising computer executable instructions stored in a computer readable storage medium; the at least one processor of the access network device 300 may read the computer executable instructions from the computer readable storage medium, and the at least one processor executing the computer executable instructions causes the access network device 300 to perform the steps of executing the access network device in the random access method shown in any one of fig. 5 to 9.

The first information in the embodiment of the application is used to determine that at least one uplink carrier of the random access resource exists in at least two uplink carriers configured for the terminal device, so that the terminal device can determine at least one uplink carrier of the random access resource according to the first information, and further determine an uplink carrier capable of initiating random access from the at least one uplink carrier of the random access resource, so as to implement that the terminal device completes random access.

In the above embodiments, all or part of the implementation may be realized by software, hardware, firmware or any combination thereof. When implemented using a software program, may take the form of a computer program product, either entirely or partially. The computer program product includes one or more computer instructions. The procedures or functions according to the embodiments of the present application are all or partially generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, e.g., the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer readable storage medium can be any available medium that can be accessed by a computer or a data terminal device including one or more integrated servers, data centers, and the like. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

Through the above description of the embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the modules or units is only one logical functional division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another device, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, that is, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially or partially contributed to by the prior art, or all or part of the technical solutions may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A random access method is applied to a chip in a terminal device which is in a connected state and is configured with at least two uplink carriers or the terminal device, and comprises the following steps:

receiving first information sent by access network equipment, wherein the first information is used for determining at least one uplink carrier with random access resources in the at least two uplink carriers;

determining an uplink carrier initiating random access in the at least one uplink carrier with the random access resource;

initiating random access on the uplink carrier wave initiating random access;

after the uplink carrier initiating random access is determined in the at least one uplink carrier with random access resources, the random access method further includes:

determining a currently activated sub-band in the uplink carrier initiating random access;

if the currently activated sub-band has no resource, switching the currently activated sub-band into a preset sub-band;

the initiating of random access on the uplink carrier initiating random access specifically includes:

and initiating random access on the uplink carrier initiating random access through the random access resource in the preset sub-band.

2. The random access method according to claim 1, wherein the determining an uplink carrier that initiates random access among the at least one uplink carrier with random access resources specifically includes:

receiving second information sent by the access network equipment, wherein the second information is used for indicating the uplink carrier initiating random access;

and determining the uplink carrier initiating the random access according to the second information.

3. The random access method according to claim 1, wherein the at least two uplink carriers include a first uplink carrier and N second uplink carriers, N ≧ 1;

the at least one uplink carrier with the random access resource comprises M second uplink carriers in the N second uplink carriers, the uplink carrier initiating the random access is one of the M second uplink carriers, N is more than or equal to M and more than or equal to 1,

or,

the at least one uplink carrier with random access resources comprises the first uplink carrier, the uplink carrier initiating random access is the first uplink carrier,

or,

the uplink carrier initiating random access is an uplink carrier configured with physical uplink control channel resources in the at least one uplink carrier with random access resources,

or,

the uplink carrier initiating the random access is the uplink carrier which is configured with the random access resource and has the shortest distance from the current transmission time in the time domain among the at least one uplink carrier with the random access resource,

or,

the uplink carrier initiating random access is: and under the condition that the scheduling request fails to trigger a random access process, sending the uplink carrier where the resource used by the scheduling request is located from the at least one uplink carrier with the random access resource.

4. The random access method according to claim 1, wherein the at least two uplink carriers include a first uplink carrier and N second uplink carriers, N ≧ 1, the random access method further comprising: acquiring the signal quality of a downlink reference signal sent by the access network equipment;

if the signal quality of the downlink reference signal is less than a signal quality threshold, the at least one uplink carrier with the random access resource includes M second uplink carriers of the N second uplink carriers, the uplink carrier initiating the random access is one of the M second uplink carriers, N is greater than or equal to M and greater than or equal to 1, and the signal quality threshold is received from the access network device.

5. The random access method according to claim 1, wherein the at least two uplink carriers include a first uplink carrier and N second uplink carriers, N ≧ 1, the random access method further comprising: acquiring the signal quality of a downlink reference signal sent by the access network equipment;

if the signal quality of the downlink reference signal is greater than or equal to the signal quality threshold value;

or,

6. The random access method according to any of claims 1-5, wherein before determining the uplink carrier initiating random access among the at least one uplink carrier with random access resources, the random access method further comprises:

and receiving third information sent by the access network equipment, wherein the third information is used for triggering a random access process.

7. The random access method according to claim 6, wherein the third information is a physical downlink control channel command, the physical downlink control channel command includes at least one of fourth information and fifth information, the fourth information includes search space position information configured by the access network device for scheduling information of each uplink carrier in the at least one uplink carrier with the random access resource, and the fifth information includes radio network temporary identifier RNTI configured by the access network device for each uplink carrier in the at least one uplink carrier with the random access resource.

8. The random access method according to any of claims 1-5, wherein the random access method further comprises:

configuring a first counter, wherein the first counter is used for recording the times of re-initiating random access;

or,

and respectively configuring a second counter for each uplink carrier in the at least one uplink carrier with the random access resource, wherein the second counter is used for recording the times of re-initiating the random access on the corresponding uplink carrier.

9. The random access method according to any of claims 1-5, wherein the random access method further comprises:

configuring a third counter and a first preset power climbing step length, wherein the third counter is used for recording the change times of the transmission power when the random access is restarted, and the value of the transmission power is changed based on the first preset power climbing step length;

or,

and respectively configuring a fourth counter and a second preset power climbing step length for each uplink carrier in the at least one uplink carrier with the random access resource, wherein the fourth counter is used for recording the change times of the sending power when the random access is restarted on the corresponding uplink carrier, and the value of the sending power is changed based on the second preset power climbing step length corresponding to the uplink carrier adopted by the random access restart.

10. A random access method is applied to an access network device or a chip in the access network device, and comprises the following steps:

sending first information to a terminal device, wherein the terminal device is in a connected state and is configured with at least two uplink carriers, and the first information is used for determining at least one uplink carrier with random access resources in the at least two uplink carriers;

receiving a random access request sent by the terminal equipment on an uplink carrier initiating random access in the at least one uplink carrier with random access resources;

before receiving a random access request sent by the terminal device on an uplink carrier initiating random access in the at least one uplink carrier with random access resources, the terminal receiving the first information further includes:

11. The random access method of claim 10, wherein the random access method further comprises:

and sending second information to the terminal equipment, wherein the second information is used for indicating the uplink carrier initiating the random access.

12. The random access method according to claim 10 or 11, wherein the random access method further comprises:

and sending third information to the terminal equipment, wherein the third information is used for triggering a random access process.

13. The random access method according to claim 12, wherein the third information is a physical downlink control channel command, the physical downlink control channel command includes at least one of fourth information and fifth information, the fourth information includes search space position information configured by the access network device for scheduling information of each uplink carrier in the at least one uplink carrier with the random access resource, and the fifth information includes radio network temporary identifier RNTI configured by the access network device for each uplink carrier in the at least one uplink carrier with the random access resource.

14. A random access apparatus, where the random access apparatus is a chip applied to a terminal device in a connected state and configured with at least two uplink carriers or the terminal device, and the random access apparatus includes:

a communication unit, configured to receive first information sent by an access network device, where the first information is used to determine at least one uplink carrier having a random access resource in the at least two uplink carriers;

a determining unit, configured to determine, according to the first information received by the communication unit, the at least one uplink carrier with the random access resource, and to determine, from the at least one uplink carrier with the random access resource, an uplink carrier that initiates random access;

the communication unit is further configured to initiate random access on the uplink carrier initiating random access determined by the determining unit;

the determining unit is further configured to determine a currently activated subband in the uplink carrier initiating random access after determining the uplink carrier initiating random access in the at least one uplink carrier with random access resources;

the random access device also comprises a switching unit;

the switching unit is configured to switch the currently activated subband to a preset subband if the currently activated subband determined by the determining unit has no resource;

the communication unit is specifically configured to initiate random access on the uplink carrier initiating random access through the random access resource in the preset subband switched by the switching unit.

15. The random access apparatus according to claim 14,

the communication unit is further configured to receive second information sent by the access network device, where the second information is used to indicate the uplink carrier initiating random access;

the determining unit is specifically configured to determine the uplink carrier initiating the random access according to the second information received by the receiving unit.

16. The random access apparatus of claim 14, wherein the at least two uplink carriers comprise a first uplink carrier and N second uplink carriers, N ≧ 1;

or,

17. The random access apparatus according to claim 14, wherein the at least two uplink carriers include a first uplink carrier and N second uplink carriers, N ≧ 1, the random access apparatus further comprising an acquisition unit;

the acquiring unit is configured to acquire the signal quality of the downlink reference signal sent by the access network device;

18. The random access apparatus according to claim 14, wherein the at least two uplink carriers include a first uplink carrier and N second uplink carriers, N ≧ 1, the random access apparatus further comprising an acquisition unit;

if the signal quality of the downlink reference signal is greater than or equal to the signal quality threshold;

or,

and the uplink carrier initiating the random access is the uplink carrier where the resource used by the scheduling request is sent from at least one uplink carrier with the random access resource under the condition that the scheduling request fails to trigger the random access process.

19. The random access apparatus according to any of claims 14-18,

the communication unit is further configured to receive third information sent by the access network device before the determining unit determines, from the at least one uplink carrier with the random access resource, an uplink carrier initiating random access, where the third information is used to trigger a random access process.

20. The apparatus of claim 19, wherein the third information is a physical downlink control channel command, the physical downlink control channel command includes at least one of fourth information and fifth information, the fourth information includes search space position information configured by the access network device for scheduling information of each uplink carrier in the at least one uplink carrier with random access resources, and the fifth information includes radio network temporary identifier RNTI configured by the access network device for each uplink carrier in the at least one uplink carrier with random access resources.

21. The random access apparatus according to any of claims 14-18, wherein the random access apparatus further comprises a first configuration unit, the first configuration unit is configured to:

or,

22. The random access apparatus according to any of claims 14-18, wherein the random access apparatus further comprises a second configuration unit, the second configuration unit is configured to:

or,

23. A random access apparatus, wherein the random access apparatus is an access network device or a chip in the access network device, and the random access apparatus includes:

a processing unit, configured to determine first information, where the first information is used to instruct a terminal device to determine at least one uplink carrier with a random access resource in at least two uplink carriers, where the terminal device is in a connected state and configured with the at least two uplink carriers;

a sending unit, configured to send the first information determined by the processing unit to the terminal device;

a receiving unit, configured to receive a random access request sent by the terminal device on an uplink carrier initiating random access in the at least one uplink carrier with random access resources;

24. The random access apparatus of claim 23,

the sending unit is further configured to send second information to the terminal device, where the second information is used to indicate the uplink carrier initiating random access.

25. The random access apparatus according to claim 23 or 24,

the sending unit is further configured to send third information to the terminal device, where the third information is used to trigger a random access procedure.

26. The apparatus of claim 25, wherein the third information is a physical downlink control channel command, the physical downlink control channel command includes at least one of fourth information and fifth information, the fourth information includes search space position information configured by the access network device for scheduling information of each uplink carrier in the at least one uplink carrier with random access resources, and the fifth information includes radio network temporary identifier RNTI configured by the access network device for each uplink carrier in the at least one uplink carrier with random access resources.