CN111867133A - A random access method, network device and terminal device - Google Patents

Abstract

The embodiment of the application discloses a random access method, network equipment and terminal equipment, which comprises the following steps: the terminal equipment sends a random access lead code to the network equipment; determining a random access-radio network temporary identifier RA-RNTI according to at least one of an identifier of a first orthogonal frequency division multiplexing OFDM symbol for sending the random access lead code, an identifier of a frequency domain for sending the random access lead code, an identifier of an uplink carrier for sending the random access lead code and a first identifier, wherein the first identifier is determined according to at least one of a system frame number SFN for sending the random access lead code, an identifier of a time slot for sending the random access lead code and a first numerical value, and the first numerical value is a positive integer; and receiving a random access response RAR sent by the network equipment according to the RA-RNTI. By adopting the embodiment of the application, when the RAR receiving window is more than 10ms, the calculated RA-RNTI is unique in the RAR receiving window, so that random access is realized.

Description

A random access method, network device and terminal device

technical field

The present application relates to the field of network communication technologies, and in particular, to a random access method, network equipment and terminal equipment.

Background technique

In the wireless communication process, the terminal device needs to obtain uplink synchronization with the network device through a random access process for subsequent communication. In the random access process, within a random access response (random access response, RAR) receiving window (when the maximum length of the window is 10ms), the random access-wireless network temporary identifier (randomaccess) corresponding to each RAR is received -radio network temporary identifier, RA-RNTI) are all unique. However, when the RAR receiving window needs to be extended to a length of more than 10ms, or even tens of milliseconds, the existing calculation method cannot guarantee that the calculated RA-RNTI is unique within the extended receiving window, which may cause multiple UEs Receiving the same RAR results in confusion in the reception of random access responses and affects wireless communication.

SUMMARY OF THE INVENTION

The embodiments of the present application provide a random access method, a network device, and a terminal device to ensure that the RA-RNTI is unique within the RAR receiving window, so that the RAR can be received correctly and random access can be successfully performed.

In a first aspect, an embodiment of the present application provides a random access method, including: a terminal device sends a random access preamble to a network device; according to the first OFDM symbol that sends the random access preamble At least one of the identifier of the random access preamble, the identifier of the frequency domain for sending the random access preamble, the identifier of the uplink carrier for sending the random access preamble, and the first identifier determine the random access-wireless network temporary identifier RA-RNTI, where the first An identifier is determined according to at least one of the system frame number SFN for sending the random access preamble, the identifier of the time slot for sending the random access preamble, and a first value, and the first value is a positive integer; finally, the network is received according to RA-RNTI The random access response RAR sent by the device. Wherein, the physical random access channel opportunity PRACH occasion represents a time-frequency position where the random access preamble can be sent, and the time-frequency position refers to a position in the time domain and a position in the frequency domain. When calculating the RA-RNTI, the RA-RNTI is only allocated for the periodically configured PRACH occasion, and the RA-RNTI is no longer allocated for the time unit without the configuration of the PRACH occasion, which can reduce unnecessary waste of resources. In addition, the introduction of SFN can ensure that when the RAR receiving window is greater than 10ms, the calculated RA-RNTI is unique within the RAR receiving window. Therefore, the RAR can be received correctly, and the random access can be successfully performed.

In an optional way, RA-RNTI=1+s_id+14×t_id+14×10× ^2k ×f_id+14×10× ^2k ×8×ul_carrier_id,t_id=ceiling((SFN×10×2 ^k +slot_id)/x)mod(10×2 ^k ), where s_id is the identifier of the first OFDM symbol, f_id is the identifier of the frequency domain, ul_carrier_id is the identifier of the uplink carrier, t_id is the first identifier, and slot_id is the time The identifier of the slot, x is the first value, the ceiling function represents the round-up operation, mod represents the remainder operation, k is used to represent the subcarrier spacing parameter, and k is an integer greater than or equal to 0. Through the calculation formula of RA-RNTI, RA-RNTI is only allocated for periodically configured PRACH occasions, and no RA-RNTI is allocated for time units without PRACH occasions, which can reduce unnecessary waste of resources. In addition, the introduction of SFN can ensure that when the RAR receiving window is greater than 10ms, the calculated RA-RNTI is unique within the RAR receiving window.

In another alternative, RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id, where t_id=ceiling((SFN_id×80+slot_id)/x )mod(80), where s_id is the identification of the first OFDM symbol, f_id is the identification of the frequency domain, ul_carrier_id is the identification of the uplink carrier, t_id is the first identification, slot_id is the identification of the time slot, and x is the first numerical value , the ceiling function represents the round-up operation, and the mod represents the remainder operation. In this method, according to the case that a system frame contains 80 time slots, RA-RNTI is only allocated for the periodically configured PRACH occasions, and the time units that are not configured with PRACH occasions are not allocated any more through the calculation formula of RA-RNTI. RA-RNTI, in this way, it is possible to avoid the waste of RA-RNTI by allocating RA-RNTI for the time order without PRACH occasion configuration to the greatest extent. In addition, the introduction of SFN can ensure that the calculated RA-RNTI is unique within a larger RAR receiving window.

In another optional manner, the first value is the value of the period of the physical random access channel opportunity PRACH occasion for sending the random access preamble. The first value is set as the period value, and the RA-RNTI can be dynamically allocated according to the period length of the PRACH occasion, thereby increasing the flexibility of the RA-RNTI calculation.

In another optional manner, the value of the periodicity of the PRACH occasion is greater than or equal to twice the difference between the maximum one-way propagation delay and the minimum one-way propagation delay, so as to ensure that the network device can distinguish the received random access delay. Enter the PRACH occasion corresponding to the preamble.

In another optional manner, the terminal device can receive the RAR sent by the network device according to the calculated RA-RNTI in the RAR receiving window. If the network device identifies the RA-RNTI used by the RAR and the RA used by the terminal device to receive the RAR - If the RNTI is the same, the RAR can be received. Specifically, the network device uses the PDCCH to schedule the RAR, wherein the downlink control information (DCI) transmitted on the PDCCH is scrambled by the RA-RNTI, and after receiving the DCI, the terminal device can decode the received RAR according to the RA-RNTI. time-frequency location so that RAR can be received accordingly.

In another optional manner, the length of the RAR receiving window is greater than or equal to twice the difference between the maximum one-way propagation delay and the minimum one-way propagation delay. It is guaranteed that the terminal equipment can receive the RAR within the RAR receiving window.

In another optional manner, the length of the RAR receiving window may be equal to twice the difference between the maximum one-way propagation delay and the minimum one-way propagation delay plus a fixed time value, where the fixed time value may be based on The indication information in the RRC signaling sent by the network device is determined. On the one hand, the length of the RAR receiving window needs to consider the propagation delay difference between different terminal equipment and network equipment, and on the other hand, it needs to consider the flexibility of the scheduling timing of network equipment (the fixed time value configured), so as to ensure that the terminal equipment can be in the RAR receiving window. RAR can be received inside.

In a second aspect, an embodiment of the present application provides a random access method, including: a terminal device sending a random access preamble to a network device; sending a random access preamble according to an identifier of a subframe for sending the random access preamble The identifier of the frequency domain, the identifier of the uplink carrier that sends the random access preamble, the system frame number SFN that sends the random access preamble, and the value of the period of the physical random access channel opportunity PRACH occasion that sends the random access preamble At least one of the random access-wireless network temporary identifiers RA-RNTI is determined; finally, the random access response RAR sent by the network device is received according to the RA-RNTI. When calculating the RA-RNTI, by changing the periodically configured PRACH occasion into a continuous PRACH occasion in the time domain, the RA-RNTI can be continuously allocated, and the RA-RNTI is no longer allocated within the unit time without configuring the PRACH occasion. It is guaranteed that when the RAR receiving window is greater than 10ms, the calculated RA-RNTI is unique within the RAR receiving window. Therefore, the RAR can be received correctly, and the random access can be successfully performed.

In an optional way, RA-RNTI=1+t_id+10×f_id+10× ^2k ul_carrier_id+10× ^2k ×2×(SFN mod ceiling(periodicity/y)), where t_id is the subframe The identifier of f_id is the identifier of the frequency domain, ul_carrier_id is the identifier of the uplink carrier, periodicity is the value of the period, the ceiling function represents the round-up operation, mod represents the remainder operation, k is used to represent the subcarrier interval parameter, and k is greater than or equal to An integer of 0, y is the duration of the system frame. According to the calculation formula of RA-RNTI, it is assumed that the minimum time unit to be considered is a subframe, that is, only one PRACH Occasion can be configured in a subframe, which ensures that RA-RNTI will not be allocated to a finer-grained time unit, so that The waste of RA-RNTI is avoided. At the same time, SFN is introduced to distinguish subframes in different SFNs to ensure that when the RAR receiving window is greater than 10ms, the calculated RA-RNTI is unique in the RAR receiving window. In addition, it should be noted that in the ceiling (periodicity/y) of the present invention, the meaning of y changes with the unit of periodicity. If the unit of periodicity is milliseconds, the unit of y is also milliseconds; and the unit of periodicity is assumed to be subframes , the unit of y is also a subframe. At this time, since the system frame is 10 subframes, the value of y can be 10. In general, the meaning of periodicity/y is that the length of one cycle involves several system frames, and it can also be understood that the length of one cycle spans several system frames. All expressions that embody this idea fall within the scope of the present invention. within the scope of protection.

In another optional manner, RA-RNTI=1+t_id+10×f_id+80ul_carrier_id+80×2×(SFN mod ceiling(periodicity/y)), where t_id is the subframe identifier and f_id is the frequency The identifier of the domain, ul_carrier_id is the identifier of the uplink carrier, periodicity is the value of the period, the ceiling function represents the round-up operation, mod represents the remainder operation, and y is the duration of the system frame. According to the situation that a system frame contains 80 time slots, according to the calculation formula of RA-RNTI, it is assumed that the minimum time unit to be considered is a subframe, that is, only one PRACH Occasion can be configured in a subframe at most, which can ensure that no The RA-RNTI is allocated in a finer-grained time unit, thereby avoiding the waste of RA-RNTI. At the same time, SFN is introduced to distinguish subframes in different SFNs to ensure that when the RAR receiving window is greater than 10ms, the calculated RA-RNTI is unique in the RAR receiving window.

In another optional manner, the value of the periodicity of the PRACH occasion is greater than or equal to twice the difference between the maximum one-way propagation delay and the minimum one-way propagation delay, so as to ensure that the network device can distinguish the received random access delay. Enter the PRACH occasion corresponding to the preamble.

In another optional manner, the terminal device can receive the RAR sent by the network device according to the calculated RA-RNTI in the RAR receiving window. If the network device identifies the RA-RNTI used by the RAR and the RA used by the terminal device to receive the RAR - If the RNTI is the same, the RAR can be received. Specifically, the network device uses the PDCCH to schedule the RAR, wherein the downlink control information (DCI) transmitted on the PDCCH is scrambled by the RA-RNTI, and the terminal device can decode the received RAR according to the RA-RNTI after receiving the DCI. time-frequency location so that RAR can be received accordingly.

In another optional manner, the length of the RAR receiving window is greater than or equal to twice the difference between the maximum one-way propagation delay and the minimum one-way propagation delay. It is guaranteed that the terminal equipment can receive the RAR within the RAR receiving window.

In another optional manner, the length of the RAR receiving window may be equal to twice the difference between the maximum one-way propagation delay and the minimum one-way propagation delay plus a fixed time value, where the fixed time value may be based on The indication information in the RRC signaling sent by the network device is determined. On the one hand, the length of the RAR receiving window needs to consider the propagation delay difference between different terminal equipment and network equipment, and on the other hand, it needs to consider the flexibility of the scheduling timing of network equipment (the fixed time value configured), so as to ensure that the terminal equipment can be in the RAR receiving window. RAR can be received inside.

In a third aspect, an embodiment of the present application provides a random access method, including: a network device receiving a random access preamble sent by a terminal device; Using at least one of the identifier of the OFDM symbol, the identifier of the frequency domain where the terminal device sends the random access preamble, the identifier of the uplink carrier where the terminal device sends the random access preamble, and the first identifier to determine the random access-wireless network temporary identifier RA-RNTI, wherein the first identifier is determined according to at least one of the system frame number SFN in which the terminal device sends the random access preamble, the identifier of the time slot in which the terminal device sends the random access preamble, and the first numerical value. is a positive integer; finally, a random access response RAR is sent to the terminal device, and the RAR is identified by RA-RNTI. When calculating the RA-RNTI, the RA-RNTI is only allocated for the periodically configured PRACH occasion, and the RA-RNTI is no longer allocated for the time unit without the configuration of the PRACH occasion, which can reduce unnecessary waste of resources. In addition, the introduction of SFN can ensure that when the RAR receiving window is greater than 10ms, the calculated RA-RNTI is unique within the RAR receiving window.

In an optional way, RA-RNTI=1+s_id+14×t_id+14×10× ^2k ×f_id+14×10× ^2k ×8×ul_carrier_id,t_id=ceiling((SFN×10×2 ^k +slot_id)/x)mod(10×2 ^k ), where s_id is the identifier of the first OFDM symbol, f_id is the identifier of the frequency domain, ul_carrier_id is the identifier of the uplink carrier, t_id is the first identifier, and slot_id is the time The identifier of the slot, x is the first value, the ceiling function represents the round-up operation, mod represents the remainder operation, k is used to represent the subcarrier spacing parameter, and k is an integer greater than or equal to 0. Through the calculation formula of RA-RNTI, RA-RNTI is only allocated for periodically configured PRACH occasions, and no RA-RNTI is allocated for time units without PRACH occasions, which can reduce unnecessary waste of resources. In addition, the introduction of SFN can ensure that when the RAR receiving window is greater than 10ms, the calculated RA-RNTI is unique within the RAR receiving window.

In another alternative, RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id, where t_id=ceiling((SFN_id×80+slot_id)/x )mod(80), where s_id is the identification of the first OFDM symbol, f_id is the identification of the frequency domain, ul_carrier_id is the identification of the uplink carrier, t_id is the first identification, slot_id is the identification of the time slot, and x is the first numerical value , the ceiling function represents the round-up operation, and the mod represents the remainder operation. In this method, according to the case that a system frame contains 80 time slots, RA-RNTI is only allocated for the periodically configured PRACH occasions, and the time units that are not configured with PRACH occasions are not allocated any more through the calculation formula of RA-RNTI. RA-RNTI, in this way, it is possible to avoid the waste of RA-RNTI by allocating RA-RNTI for the time order without PRACH occasion configuration to the greatest extent. In addition, the introduction of SFN can ensure that when the RAR receiving window is greater than 10ms, the calculated RA-RNTI is unique within the RAR receiving window.

In another optional manner, the first value is the value of the period of the physical random access channel opportunity PRACH occasion for sending the random access preamble. Reduce the complexity of computing RA-RNTI.

In another optional manner, the value of the periodicity of the PRACH occasion is greater than or equal to twice the difference between the maximum one-way propagation delay and the minimum one-way propagation delay, so as to ensure that the network device can distinguish the received random access delay. Enter the PRACH occasion corresponding to the preamble.

In another optional manner, the network device may broadcast the maximum one-way propagation delay and the minimum one-way propagation delay, or may send indication information to the terminal device through RRC signaling, where the indication information is used to notify the terminal device and the network Maximum one-way propagation delay and minimum one-way propagation delay between devices. So that the terminal device can determine the value periodicity of the period of the PRACH occasion according to the maximum one-way propagation delay and the minimum one-way propagation delay.

In a fourth aspect, an embodiment of the present application provides a random access method, including: a network device receiving a random access preamble sent by a terminal device; The frequency domain identifier of the random access preamble, the identifier of the uplink carrier where the terminal device sends the random access preamble, the system frame number SFN where the terminal device sends the random access preamble, and the physical randomness of the random access preamble sent by the terminal device. At least one of the values of the period of the access channel opportunity PRACH occasion determines the random access-wireless network temporary identifier RA-RNTI; finally, a random access response RAR is sent to the terminal device, and the RAR is identified by the RA-RNTI. When calculating the RA-RNTI, the RA-RNTI is only allocated for the periodically configured PRACH occasion, and the RA-RNTI is no longer allocated for the time unit without the configuration of the PRACH occasion, which can reduce unnecessary waste of resources. In addition, the introduction of SFN can ensure that when the RAR receiving window is greater than 10ms, the calculated RA-RNTI is unique within the RAR receiving window.

In another alternative, RA-RNTI=1+t_id+10×f_id+10× ^2k ul_carrier_id+10× ^2k ×2×(SFN mod ceiling(periodicity/y)), where t_id is the child Frame ID, f_id is the ID of the frequency domain, ul_carrier_id is the ID of the uplink carrier, periodicity is the value of the period, the ceiling function represents the round-up operation, mod represents the remainder operation, k is used to represent the subcarrier interval parameter, and k is greater than Integer equal to 0, y is the duration of the system frame. Through the calculation formula of RA-RNTI, it is assumed that the minimum time unit to be considered is a subframe, that is, only one PRACH occasion may be configured in a subframe, which ensures that RA-RNTI will not be allocated for a finer-grained time unit, thus The waste of RA-RNTI is avoided. At the same time, SFN is introduced to distinguish subframes in different SFNs to ensure that the calculated RA-RNTI is unique within a larger RAR receiving window.

In another optional manner, RA-RNTI=1+t_id+10×f_id+80ul_carrier_id+80×2×(SFN mod ceiling(periodicity/y)), where t_id is the subframe identifier and f_id is the frequency The identifier of the domain, ul_carrier_id is the identifier of the uplink carrier, periodicity is the value of the period, the ceiling function represents the round-up operation, mod represents the remainder operation, and y is the duration of the system frame. According to the situation that a system frame contains 80 time slots, according to the calculation formula of RA-RNTI, it is assumed that the minimum time unit to be considered is a subframe, that is, only one PRACH Occasion can be configured in a subframe at most, which can ensure that no The RA-RNTI is allocated in a finer-grained time unit, thereby avoiding the waste of RA-RNTI. At the same time, SFN is introduced to distinguish subframes in different SFNs to ensure that the calculated RA-RNTI is unique within a larger RAR receiving window.

In another optional manner, the value of the periodicity of the PRACH occasion is greater than or equal to twice the difference between the maximum one-way propagation delay and the minimum one-way propagation delay, so as to ensure that the network device can distinguish the received random access delay. Enter the PRACH occasion corresponding to the preamble.

In another optional manner, the network device may broadcast the maximum one-way propagation delay and the minimum one-way propagation delay, or may send indication information to the terminal device through RRC signaling, where the indication information is used to notify the terminal device and the network Maximum one-way propagation delay and minimum one-way propagation delay between devices. So that the terminal device can determine the value periodicity of the period of the PRACH occasion according to the maximum one-way propagation delay and the minimum one-way propagation delay.

In a fifth aspect, an embodiment of the present application provides a terminal device, where the terminal device is configured to implement the methods and functions performed by the terminal device in the first aspect and the second aspect, and is implemented by hardware/software, and the hardware/software Include modules corresponding to the above functions.

In a sixth aspect, an embodiment of the present application provides a network device. The network device is configured to implement the methods and functions performed by the network device in the third aspect and the fourth aspect, and is implemented by hardware/software. Include modules corresponding to the above functions.

In a seventh aspect, an embodiment of the present application provides another terminal device, including: a processor, a memory, and a communication bus, wherein the communication bus is used to implement connection and communication between the processor and the memory, and the processor executes a program stored in the memory It is used to implement the steps in the random access method provided in the first aspect and the second aspect.

In a possible design, the terminal device provided by the present application may include a module for executing the behavior of the terminal device in the above method design. A module can be software and/or hardware.

In an eighth aspect, an embodiment of the present application provides another network device, including: a processor, a memory, and a communication bus, wherein the communication bus is used to implement connection and communication between the processor and the memory, and the processor executes a program stored in the memory It is used to implement the steps in the random access method provided by the third aspect and the fourth aspect.

In a possible design, the network device provided by this application may include a module for executing the behavior of the network device in the above method design. A module can be software and/or hardware.

In a ninth aspect, the present application provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, when the computer-readable storage medium runs on a computer, the computer executes the methods of the above aspects.

In a tenth aspect, the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the methods of the above aspects.

In an eleventh aspect, an embodiment of the present application provides a communication system, where the communication system includes the terminal device described in the fifth aspect and the seventh aspect, and the network device described in the sixth aspect and the eighth aspect.

Description of drawings

In order to more clearly describe the technical solutions in the embodiments of the present application or the background technology, the accompanying drawings required in the embodiments or the background technology of the present application will be described below.

FIG. 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present application;

FIG. 2 is a schematic flowchart of a wireless access method provided by an embodiment of the present application;

3 is a schematic diagram of an NTN scenario provided by an embodiment of the present application;

4 is a schematic configuration diagram of a period of a PRACH occasion provided by an embodiment of the present application;

FIG. 5 is a schematic flowchart of another wireless access method provided by an embodiment of the present application;

6 is a schematic structural diagram of a terminal device provided by an embodiment of the present application;

7 is a schematic structural diagram of a network device provided by an embodiment of the present application;

FIG. 8 is a schematic structural diagram of another terminal device provided by an embodiment of the present application;

FIG. 9 is a schematic structural diagram of another network device provided by an embodiment of the present application.

Detailed ways

The embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

As shown in FIG. 1 , FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present application. The communication system 100 may include a network device 110 and terminal devices 101 to 106 . It should be understood that the communication system 100 may include more or less network devices or terminal devices. The network device or the terminal device may be hardware, software divided by functions, or a combination of the above two. In addition, the terminal device 104 to the terminal device 106 may also form a communication system, for example, the terminal device 105 may send downlink data to the terminal device 104 or the terminal device 106 . The network device and the terminal device can communicate through other devices or network elements. The network device 110 can send downlink data to the terminal device 101 to the terminal device 106 , and can also receive the uplink data sent by the terminal device 101 to the terminal device 106 . Of course, the terminal devices 101 to 106 may also send uplink data to the network device 110 , and may also receive downlink data sent by the network device 110 . The terminal devices 101 to 106 may be user equipment (user equipment, UE), cellular phones, smart phones, portable computers, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, and personal digital assistants (personal digital assistants). PDA) and/or any other suitable device for communicating over the wireless communication system 100, and the like. The network device 110 may be a device for communicating with terminal devices, and may be an access point, a relay node, a base transceiver station (BTS), a node B (nodeB, NB), an evolved node (evolved node B) , eNB) or 5G base station (gNB), refers to the device in the access network that communicates with the terminal device through one or more sectors on the air interface.

The communication system 100 may adopt a public land mobile network (PLMN), a device-to-device (D2D) network, a machine-to-machine (M2M) network, an internet of things (internet of things) things, IoT) or other networks. The communication system 100 can be applied to a fifth generation mobile communication technology (5th generation, 5G) new radio (NR) system, and can also be applied to a non-terrestrial communication network, such as a communication network in which the base station is on a satellite or other flying equipment , or a communication network that uses satellites, flight equipment, etc. as relays. It can also be applied to scenarios based on 5G architecture that utilize unlicensed spectrum for communication.

The embodiments of the present application relate to a random access process, and the random access process is introduced below:

The terminal device first sends a random access preamble (RAP) to the network device, and after the terminal device sends the random access preamble, an RA-RNTI can be calculated. After the network device receives the random access preamble, it determines that the terminal device requests random access, and can estimate the transmission delay between the terminal device and the network device, or calculate an RA-RNTI, and then send random access to the terminal device. Access response (random access response, RAR), and use RA-RNTI to identify the RAR. The terminal device monitors the physical downlink control channel (PDCCH) in the RAR receiving window, decodes the DCI using the RA-RNTI calculated by itself, and then receives the corresponding RAR. If the RA-RNTI used by the network device to identify the RAR is the same as the RA-RNTI used by the terminal device to receive the RAR, the RAR can be received correctly. If the RAR cannot be received correctly, it means that the RAR sent by the network device is not received within the RAR receiving window, and it is determined that the random access process fails.

In the random access process, the value of the RA-RNTI is determined by the time-frequency position of the physical random access channel opportunity (PRACH occasion) of the random access preamble. The time-frequency position refers to the position of the random access preamble in the time domain and the position in the frequency domain. After the terminal device sends the random access preamble, it can calculate an RA-RNTI according to information such as the time-frequency position of the random access preamble, and then receive the corresponding RAR according to the RA-RNTI within the RAR time window. Wherein, the RA-RNTI corresponds to the PRACH occasion one-to-one, and the terminal device determines on which PRACH occasion the random access preamble is sent, so one RA-RNTI can be calculated. After the network device receives the random access preamble, it can also calculate a same RA-RNTI according to the time-frequency position of the PRACH occasion, and the RAR is identified by the RA-RNTI.

The calculation formula of RA-RNTI is as follows: RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id, where s_id represents the first positive value of the random access preamble The identifier of the orthogonal frequency division multiplexing (OFDM) symbol (0≤s_id<14), t_id is the identifier of the time slot for sending the random access preamble (0≤t_id<80), and f_id is the sending The identifier of the frequency domain of the random access preamble (0≤f_id<8), and ul_carrier_id sends the identifier of the uplink carrier of the random access preamble (0 or 1).

The RA-RNTI calculated by the calculation formula can ensure that the RA-RNTI corresponding to each RAR received within a RAR receiving window (maximum length is 10ms) is unique. That is, within a 10ms RAR receiving window, the RAR received in each unit time corresponds to a unique RA-RNTI. If there are 100 units of time within the 10ms RAR receive window, there are 100 RA-RNTIs. If the length of the RAR receiving window is extended to 20ms, there are 200 units of time. In this case, 100 RA-RNTIs cannot guarantee that each unit of time has a unique RA-RNTI. In some communication scenarios, such as unlicensed spectrum communication scenarios or non-terrestrial networks (NTN) scenarios, the RAR receiving window needs to be extended to a length of more than 10 ms, or even tens of milliseconds. The existing calculation method cannot guarantee that the calculated RA-RNTI is unique within the extended receiving window, so multiple UEs may receive the same RAR, resulting in confusion in the reception of random access responses and affecting wireless communication. In order to solve the above technical problems, the embodiments of the present application provide the following solutions.

As shown in FIG. 2 , FIG. 2 is a schematic flowchart of a wireless access method provided by an embodiment of the present application. The steps in the implementation of the present application include at least:

S201, a terminal device sends a random access preamble to a network device, and the network device receives the random access preamble sent by the terminal device.

S202, the terminal device sends the random access preamble according to the identifier of the first OFDM symbol for sending the random access preamble and the identifier of the frequency domain where the random access preamble is sent. At least one of the identifier of the uplink carrier and the first identifier determines the random access-radio network temporary identifier RA-RNTI, wherein the first identifier is based on the system frame number (system frame number) that sends the random access preamble. , SFN), at least one of the identifier of the time slot in which the random access preamble is sent, and a first value, where the first value is a positive integer. The following options are included:

In an optional way, RA-RNTI=1+s_id+14×t_id+14×10× ^2k ×f_id+14×10× ^2k ×8×ul_carrier_id,t_id=ceiling((SFN×10×2 ^k +slot_id)/x)mod(10×2 ^k ), wherein the s_id is the identifier of the first OFDM symbol, and 0≤s_id<14. The f_id is the identifier of the frequency domain, and 0≤f_id<8. The ul_carrier_id is the identifier of the uplink carrier, and ul_carrier_id=0 or 1. The t_id is the first identifier, 0≤t_id<10×2 ^k, , and the slot_id is the identifier of the time slot, 0≤slot_id<80. The x is the first value, and the first value may be the value periodicity of the period of the physical random access channel opportunity PRACH occasion for sending the random access preamble, or it may be a positive integer assigned, where the first value is The unit is time slot. The ceiling function represents a round-up operation, the mod represents a remainder operation, the k is used to represent a sub-carrier space (SCS) parameter, and the k is an integer greater than or equal to 0. When k=0, it means SCS=15×2 ⁰ =15kHz, when k=1, it means SCS=15×2 ¹ =30kHz, and so on.

For the above calculation formula, when the system frame contains 80 time slots, that is, when k=3, RA-RNTI=1+s_id+14×t_id+14×10×8×f_id+14×80×8× ul_carrier_id, t_id=ceiling((SFN×80+slot_id)/x)mod(80). Further, the first value x may be the value periodicity of the period of the PRACHoccasion in which the random access preamble is sent, and in the case where the value of the period of the PRACH occasion is configured to be the shortest, that is, when x=2, RA-RNTI=1+s_id +14×t_id+14×10×8×f_id+14×80×8×ul_carrier_id, t_id=ceiling((SFN×80+slot_id)/2)mod(80). It should be noted that when x=1, t_id=ceiling(SFN×80+slot_id)mod(80)=slot_id, which is substituted into the above calculation formula to obtain: RA-RNTI=1+s_id+14×slot_id+14×10×8× f_id+14×80×8×ul_carrier_id is the same as the calculation formula of RA-RNTI given above when the length of the RAR receiving window is not greater than 10ms. Therefore, the RA-RNTI calculated in the embodiment of the present application can satisfy both the case where the length of the RAR receiving window is not greater than 10 ms and the case where the length of the RAR receiving window is greater than 10 ms.

The embodiments of the present application also provide several other situations, including:

When k=2, RA-RNTI=1+s_id+14×t_id+14×10×4×f_id+14×40×8×ul_carrier_id, t_id=ceiling((SFN×40+slot_id)/x)mod( 40).

When k=1, RA-RNTI=1+s_id+14×t_id+14×20×f_id+14×20×8×ul_carrier_id, t_id=ceiling((SFN×20+slot_id)/x)mod(20) .

When k=0, RA-RNTI=1+s_id+14×t_id+14×10×f_id+14×10×8×ul_carrier_id, t_id=ceiling((SFN×10+slot_id)/x)mod(10) .

In another optional manner, the embodiment of the present application also provides several calculation formulas of RA-RNTI independent of k, including at least:

RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id, where t_id=ceiling((SFN_id×80+slot_id)/x)mod(80), where all The s_id is the identifier of the first OFDM symbol, and 0≤s_id<14. The f_id is the identifier of the frequency domain, and 0≤f_id<8. The ul_carrier_id is the identifier (0 or 1) of the uplink carrier, the t_id is the first identifier, and the slot_id is the identifier of the time slot, 0≤slot_id<80. The x is the first value, the ceiling function represents a round-up operation, and the mod represents a remainder operation.

RA-RNTI=1+s_id+14×t_id+14×10×4×f_id+14×40×8×ul_carrier_id, where t_id=ceiling((SFN×40+slot_id)/x)mod(40).

RA-RNTI=1+s_id+14×t_id+14×20×f_id+14×20×8×ul_carrier_id, where t_id=ceiling((SFN×20+slot_id)/x)mod(20).

RA-RNTI=1+s_id+14×t_id+14×10×f_id+14×10×8×ul_carrier_id, where t_id=ceiling((SFN×10+slot_id)/x)mod(10).

Optionally, the first value may be the value periodicity of the period of the physical random access channel opportunity PRACH occasion for sending the random access preamble. Among them, the value of the periodicity of the PRACH occasion is greater than or equal to twice the difference between the maximum one-way propagation delay and the minimum one-way propagation delay, so as to ensure that the network device can distinguish the PRACH corresponding to the received random access preamble. occasion. Specifically, the network device may broadcast the maximum one-way propagation delay and the minimum one-way propagation delay, or may send indication information to the terminal device through radio resource control (RRC) signaling, where the indication information is used to notify the terminal The maximum one-way propagation delay and the minimum one-way propagation delay between the device and the network device. The terminal device may determine the value periodicity of the period of the PRACH occasion according to the maximum one-way propagation delay and the minimum one-way propagation delay.

For example, as shown in Figure 3, in the NTN scenario, due to the large distance difference between the base station and different UEs, in the same cell, the propagation delays from different UEs to the base station may be very different, so the random access preamble Both the time-frequency position and the RAR receiving window of the code PRACH occasion need to consider all UEs in different positions within the signal coverage of the same base station. In practical applications, only the UE farthest from the base station and the UE closest to the base station can be considered, the maximum one-way propagation delay can be determined according to the distance between the farthest UE and the base station, and the distance between the closest UE and the base station can be determined according to the distance between the closest UE and the base station. Determine the minimum delay for one-way propagation. Other UEs are included in this range.

Also shown in FIG. 4 , FIG. 4 is a schematic configuration diagram of a period of a PRACH occasion provided by an embodiment of the present application. If the value periodicity of the period of PRACH occasion is not less than (maximum one-way propagation delay - minimum one-way propagation delay)*2, and the value of the period of PRACH occasion is greater than or equal to the length of the receiving window for the base station to receive the random access preamble, Then the receiving window 1 and receiving window 2 of the base station receiving the random access preamble can be staggered. If the value of the period of the PRACHoccasion is less than (maximum one-way propagation delay - minimum one-way propagation delay)*2, then the start of receiving window 2 The starting position needs to be moved forward, resulting in an overlapping area between receiving window 1 and receiving window 2. If the base station receives the random access preamble sent by the terminal device in the overlapping area, it cannot determine which PRACH occasion the random access preamble is sent from. Therefore, only when the periodicity is not less than (maximum one-way propagation delay - minimum one-way propagation delay)*2, and the value of the period of the PRACH occasion is greater than or equal to the length of the receiving window for the base station to receive the random access preamble, It can be guaranteed that only one random access preamble is received in each random access preamble receiving window.

After receiving the random access preamble, the network device may send the random access preamble according to the identifier of the first OFDM symbol of the random access preamble sent by the terminal device, At least one of the frequency domain identifier of the incoming preamble, the identifier of the uplink carrier on which the terminal device sends the random access preamble, and the first identifier determine the random access-wireless network temporary identifier RA-RNTI, where the The first identifier is determined according to at least one of the system frame number SFN where the terminal device sends the random access preamble, the identifier of the time slot where the terminal device sends the random access preamble, and a first value, The first numerical value is a positive integer. The specific method for calculating the RA-RNTI by the network device is the same as the method for calculating the RA-RNTI by the terminal device, which will not be repeated here. The network device may identify the RAR through the calculated RA-RNTI, and then send the RAR identified through the RA-RNTI to the terminal device. Specifically, the RAR may use the RA-RNTI identifier to schedule the RAR by the network device using the PDCCH, wherein the DCI transmitted on the PDCCH is scrambled by using the RA-RNTI.

S203, the network device sends a random access response RAR to the terminal device, and the terminal device receives the random access response RAR sent by the network device according to the RA-RNTI.

In the specific implementation, the terminal device can receive the RAR sent by the network device according to the calculated RA-RNTI in the RAR receiving window. If the RA-RNTI used by the network device to identify the RAR is the same as the RA-RNTI used by the terminal device to receive the RAR, then RAR can be received. Specifically, the network device uses the PDCCH to schedule the RAR, and the DCI transmitted on the PDCCH is scrambled by the RA-RNTI. After receiving the DCI, the terminal device can decode the time-frequency position of the received RAR according to the RA-RNTI, so as to receive the corresponding RAR. rar. Among them, the length of the RAR receiving window is greater than or equal to twice the difference between the maximum one-way propagation delay and the minimum one-way propagation delay, and can also be greater than or equal to the difference between the maximum one-way propagation delay and the minimum one-way propagation delay. Twice the value plus a fixed time value, where the fixed time value may be determined according to the indication information in the RRC signaling sent by the network device. The first time difference between the time when the UE sends the random access preamble and the time when the UE receives the RAR can be greater than or equal to the one-way propagation delay*2, and the fixed time value can be the time from the time when the base station receives the random access preamble to the time when the base station sends the RAR. Time difference value, the fixed time value is greater than or equal to 0. For different UEs in a cell, due to the difference in one-way propagation delay with the base station, the maximum difference of the first time difference between different UEs is the maximum one-way propagation delay minus the minimum one-way propagation delay. twice the difference. Taking twice the minimum one-way propagation delay of the UE closest to the base station as the compensation value, the time of the UE's RAR receiving window should be greater than or equal to the difference between the maximum one-way propagation delay minus the minimum one-way propagation delay. Twice plus a fixed time value. Taking twice the minimum one-way propagation delay of the UE closest to the base station plus the fixed time value as the compensation value, the time of the RAR receiving window of the UE should be greater than or equal to the maximum one-way propagation delay minus the minimum one-way propagation time. twice the difference in delay. If the length of the RAR receiving window is less than twice the difference between the maximum one-way propagation delay and the minimum one-way propagation delay, the RAR receiving window is closed during the RAR propagation process, resulting in failure to receive RAR.

In this embodiment of the present application, when calculating RA-RNTI, RA-RNTI is only allocated for periodically configured PRACH occasions, and no RA-RNTI is allocated for time units without PRACH occasions, which can reduce unnecessary Waste of resources. In addition, the introduction of SFN can ensure that when the RAR receiving window is greater than 10ms, the calculated RA-RNTI is unique within the RAR receiving window, and the number of RA-RNTIs does not increase, so that the RAR can be received correctly and random access can be performed successfully.

As shown in FIG. 5 , FIG. 5 is a schematic flowchart of another wireless access method provided by an embodiment of the present application. The steps in the implementation of the present application include at least:

S501, a terminal device sends a random access preamble to a network device, and the network device receives the random access preamble sent by the terminal device.

S502, the terminal device sends the random access preamble according to the identifier of the subframe that sends the random access preamble, the identifier of the frequency domain where the random access preamble is sent, the identifier of the uplink carrier that sends the random access preamble, and the At least one of the system frame number SFN of the random access preamble and the value of the period of the physical random access channel opportunity PRACHoccasion that transmits the random access preamble determines the random access-radio network temporary identifier RA-RNTI. The following options are included:

In an optional manner, RA-RNTI=1+t_id+10×f_id+10× ^2k ul_carrier_id+10× ^2k ×2×(SFN mod ceiling(periodicity/y)), wherein the t_id is The identifier of the subframe, 0≤t_id<10. The f_id is the identifier of the frequency domain, and 0≤f_id<8. The ul_carrier_id is the identifier of the uplink carrier, and the ul_carrier_id is equal to 0 or 1. The periodicity is the value of the period, and the unit is subframe. The ceiling function represents the round-up operation, the mod represents the remainder operation, the k is used to represent the subcarrier interval parameter, the k is an integer greater than or equal to 0, and the y is the duration of the system frame, in units of ms, for example y can be 10. When k=0, it means SCS=15×2 ⁰ =15kHz, when k=1, it means SCS=15×2 ¹ =30kHz, and so on.

For the above calculation formula, when the system frame contains 80 time slots, that is, when k=3, RA-RNTI=1+t_id+10×f_id+10×8×ul_carrier_id+80×2×(SFN mod ceiling (periodicity/y)). The embodiments of the present application also provide several other situations, including:

When k=2, RA-RNTI=1+t_id+10×f_id+10×4×ul_carrier_id+40×2×(SFNmod ceiling(periodicity/y)).

When k=1, RA-RNTI=1+t_id+10×f_id+10×2×ul_carrier_id+20×2×(SFNmod ceiling(periodicity/y)).

When k=0, RA-RNTI=1+t_id+10×f_id+10×ul_carrier_id+10×2×(SFN modceiling(periodicity/y)).

In another optional manner, the embodiment of the present application also provides several calculation formulas of RA-RNTI independent of k, including at least:

RA-RNTI=1+t_id+10×f_id+80ul_carrier_id+80×2×(SFN mod ceiling(periodicity/y)), wherein the t_id is the identifier of the subframe, 0≤t_id<10. The f_id is the identifier of the frequency domain, and 0≤f_id<8. The ul_carrier_id is the identifier of the uplink carrier, the ul_carrier_id is equal to 0 or 1, and the periodicity is the value of the period. The ceiling function represents an upward rounding operation, the mod represents a remainder operation, and the y is the duration of the system frame, in ms, for example, y may be 10.

RA-RNTI=1+t_id+10×f_id+10×4×ul_carrier_id+40×2×(SFN mod ceiling(periodicity/y)).

RA-RNTI=1+t_id+10×f_id+10×2×ul_carrier_id+20×2×(SFN mod ceiling(periodicity/y)).

RA-RNTI=1+t_id+10×f_id+10×ul_carrier_id+10×2×(SFN mod ceiling(periodicity/y)).

It should be noted that in some scenarios (such as NTN scenarios), the period of PRACH occasion cannot be configured to such a short time granularity as a symbol or even a time slot in the time domain, and it is likely that at most one PRACHoccasion can be configured in a subframe , so the parameters representing symbols and time slots do not need to be reflected in the calculation of RA-RNTI, but only the subframe granularity needs to be reflected. In this embodiment of the present application, the RA-RNTI is calculated at the subframe granularity.

Among them, the value of the periodicity of the PRACH occasion is greater than or equal to twice the difference between the maximum one-way propagation delay and the minimum one-way propagation delay, so as to ensure that the network device can distinguish the PRACH corresponding to the received random access preamble. occasion. Specifically, the network device can broadcast the maximum one-way propagation delay and the minimum one-way propagation delay, and can also send indication information to the terminal device through RRC signaling, where the indication information is used to notify the terminal device and the network device. Forward propagation delay and minimum one-way propagation delay. The terminal device may determine the value periodicity of the period of the PRACH occasion according to the maximum one-way propagation delay and the minimum one-way propagation delay.

For example, as shown in Figure 3, in the NTN scenario, due to the large distance difference between the base station and different UEs, in the same cell, the propagation delays from different UEs to the base station may be very different, so the random access preamble Both the time-frequency position and the RAR receiving window of the code PRACH occasion need to consider all UEs in different positions within the signal coverage of the same base station. In practical applications, only the UE farthest from the base station and the UE closest to the base station can be considered, the maximum one-way propagation delay can be determined according to the distance between the farthest UE and the base station, and the distance between the closest UE and the base station can be determined according to the distance between the closest UE and the base station. Determine the minimum delay for one-way propagation. Other UEs are included in this range.

As shown in Figure 4, if the periodicity value of the PRACH occasion is not less than (maximum one-way propagation delay-minimum one-way propagation delay)*2, and the value of the period of the PRACH occasion is greater than or equal to the base station receiving the random access preamble The length of the receiving window of the code, then the receiving window 1 and receiving window 2 of the PRACH occasion where the base station receives the random access preamble can be staggered, if the value of the period of the PRACH occasion is less than (maximum one-way propagation delay - minimum one-way propagation time extension)*2, the starting position of receiving window 2 needs to be moved forward, resulting in an overlapping area between receiving window 1 and receiving window 2. If the base station receives the random access preamble sent by the terminal device in the overlapping area, it cannot determine which PRACH occasion the random access preamble is sent from. Therefore, only when the periodicity is not less than (maximum one-way propagation delay - minimum one-way propagation delay)*2, and the value of the period of the PRACH occasion is greater than or equal to the length of the receiving window for the base station to receive the random access preamble, It can be guaranteed that only one random access preamble is received in each random access preamble receiving window.

After receiving the random access preamble, the network device may, according to the identifier of the subframe in which the terminal device sends the random access preamble, the identifier of the frequency domain where the terminal device sends the random access preamble, and the The identifier of the uplink carrier on which the terminal device sends the random access preamble, the system frame number SFN on which the terminal device sends the random access preamble, and the physical randomness of the random access preamble sent by the terminal device. At least one of the values of the period of the access channel opportunity PRACHoccasion determines the random access-radio network temporary identity RA-RNTI. The specific method for calculating the RA-RNTI by the network device is the same as the method for calculating the RA-RNTI by the terminal device, which will not be repeated here. The network device may identify the RAR through the calculated RA-RNTI, and then send the RAR identified through the RA-RNTI to the terminal device. Specifically, the RAR may use the RA-RNTI identifier to schedule the RAR by the network device using the PDCCH, wherein the DCI transmitted on the PDCCH is scrambled by using the RA-RNTI.

S503, the network device sends a random access response RAR to the terminal device, and the terminal device receives the random access response RAR sent by the network device according to the RA-RNTI.

In the specific implementation, the terminal device can receive the RAR sent by the network device according to the calculated RA-RNTI in the RAR receiving window. If the RA-RNTI used by the network device to identify the RAR is the same as the RA-RNTI used by the terminal device to receive the RAR, then RAR can be received. Specifically, the network device uses the PDCCH to schedule the RAR, and the DCI transmitted on the PDCCH is scrambled by the RA-RNTI. After receiving the DCI, the terminal device can decode the time-frequency position of the received RAR according to the RA-RNTI, so as to receive the corresponding RAR. rar. Among them, the length of the RAR receiving window is greater than or equal to twice the difference between the maximum one-way propagation delay and the minimum one-way propagation delay, and can also be greater than or equal to the difference between the maximum one-way propagation delay and the minimum one-way propagation delay. Twice the value plus a fixed time value, where the fixed time value may be determined according to the indication information in the RRC signaling sent by the network device. The first time difference between the time when the UE sends the random access preamble and the time when the UE receives the RAR can be greater than or equal to the one-way propagation delay*2, and the fixed time value can be the time from the time when the base station receives the random access preamble to the time when the base station sends the RAR. Time difference value, the fixed time value is greater than or equal to 0. For different UEs in a cell, due to the difference in one-way propagation delay with the base station, the maximum difference of the first time difference between different UEs is the maximum one-way propagation delay minus the minimum one-way propagation delay. twice the difference. Taking twice the minimum one-way propagation delay of the UE closest to the base station as the compensation value, the time of the UE's RAR receiving window should be greater than or equal to the difference between the maximum one-way propagation delay minus the minimum one-way propagation delay. Twice plus a fixed time value. Taking twice the minimum one-way propagation delay of the UE closest to the base station plus the fixed time value as the compensation value, the time of the RAR receiving window of the UE should be greater than or equal to the maximum one-way propagation delay minus the minimum one-way propagation time. twice the difference in delay. If the length of the RAR receiving window is less than twice the difference between the maximum one-way propagation delay and the minimum one-way propagation delay, the RAR receiving window is closed during the RAR propagation process, resulting in failure to receive RAR.

In the embodiment of the present application, through the calculation formula of RA-RNTI, it is assumed that the minimum time unit to be considered is a subframe, that is, only one PRACH Occasion can be configured in a subframe at most, which can ensure that the time unit of more fine-grained will not be configured. The unit allocates RA-RNTI, thus avoiding the waste of RA-RNTI. At the same time, SFN is introduced to distinguish subframes in different SFNs to ensure that when the RAR receiving window is greater than 10ms, the calculated RA-RNTI is unique in the RAR receiving window. Therefore, the RAR can be received correctly, and the random access can be successfully performed.

The methods of the embodiments of the present application are described in detail above, and the apparatuses of the embodiments of the present application are provided below.

Referring to FIG. 6, FIG. 6 is a schematic structural diagram of a terminal device provided by an embodiment of the present application. The terminal device may include a sending module 601, a processing module 602, and a receiving module 603, wherein the detailed description of each module is as follows.

The sending module 601 is configured to send a random access preamble to a network device.

The processing module 602 is configured to send the random access At least one of the identifier of the uplink carrier of the preamble and the first identifier determines the random access-radio network temporary identifier RA-RNTI, wherein the first identifier is based on the system frame number SFN, At least one of an identifier of a time slot for sending the random access preamble and a first value is determined, and the first value is a positive integer.

The receiving module 603 is configured to receive the random access response RAR sent by the network device according to the RA-RNTI.

Wherein, the RA-RNTI=1+s_id+14×t_id+14×10× ^2k ×f_id+14×10× ^2k ×8×ul_carrier_id,t_id=ceiling((SFN×10× ^2k +slot_id) /x)mod(10×2 ^k ), wherein the s_id is the identifier of the first OFDM symbol, the f_id is the identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, and the The t_id is the first identifier, the slot_id is the identifier of the time slot, the x is the first value, the ceiling function represents a round-up operation, the mod represents a remainder operation, and the k is used to represent a subcarrier spacing parameter, where k is an integer greater than or equal to 0.

Wherein, the RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id, where t_id=ceiling((SFN_id×80+slot_id)/x)mod(80) , wherein the s_id is the identifier of the first OFDM symbol, the f_id is the identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, the t_id is the first identifier, and the The slot_id is the identifier of the time slot, the x is the first value, the ceiling function represents a round-up operation, and the mod represents a remainder operation.

Wherein, the first value is a value of the period of the physical random access channel opportunity PRACHoccasion for sending the random access preamble.

In another embodiment:

A sending module 601, configured to send a random access preamble to a network device;

The processing module 602 is configured to transmit the random access preamble according to the identifier of the subframe that sends the random access preamble, the identifier of the frequency domain where the random access preamble is sent, and the identifier of the uplink carrier that sends the random access preamble. At least one of the system frame number SFN of the random access preamble and the value of the period of the physical random access channel opportunity PRACHoccasion for sending the random access preamble determines the random access-radio network temporary identifier RA-RNTI;

The receiving module 603 is configured to receive the random access response RAR sent by the network device according to the RA-RNTI.

Wherein, the RA-RNTI=1+t_id+10×f_id+10× ^2k ul_carrier_id+10× ^2k ×2×(SFNmod ceiling(periodicity/y)), wherein the t_id is the subframe’s identifier, the f_id is the identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, the periodicity is the value of the period, the ceiling function represents the round-up operation, and the mod represents the remainder operation, the k is used to represent the subcarrier spacing parameter, the k is an integer greater than or equal to 0, and the y is the duration of the system frame.

Wherein, the RA-RNTI=1+t_id+10×f_id+80ul_carrier_id+80×2×(SFN modceiling(periodicity/y)), wherein the t_id is the identifier of the subframe, and the f_id is the The identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, the periodicity is the value of the period, the ceiling function represents the round-up operation, the mod represents the remainder operation, and the y is the system The duration of the frame.

It should be noted that, the implementation of each module may also correspond to the corresponding descriptions of the method embodiments shown in FIG. 2 and FIG. 5 , to execute the methods and functions performed by the terminal device in the foregoing embodiments.

Referring to FIG. 7 , FIG. 7 is a schematic structural diagram of a network device provided by an embodiment of the present application. The network device may include a receiving module 701 , a processing module 702 , and a sending module 703 , wherein the detailed description of each module is as follows.

A receiving module 701, configured to receive a random access preamble sent by a terminal device;

The processing module 702 is configured to, according to the identifier of the first OFDM symbol of the random access preamble sent by the terminal device, the frequency domain of the random access preamble sent by the terminal device, at least one of the identifier, the identifier of the uplink carrier on which the terminal device sends the random access preamble, and the first identifier to determine the random access-radio network temporary identifier RA-RNTI, wherein the first identifier is based on the Determine at least one of the system frame number SFN where the terminal device sends the random access preamble, the identifier of the time slot where the terminal device sends the random access preamble, and a first value, where the first value is positive integer;

A sending module 703, configured to send a random access response RAR to the terminal device, where the RAR is identified by the RA-RNTI.

Wherein, the RA-RNTI=1+s_id+14×t_id+14×10× ^2k ×f_id+14×10× ^2k ×8×ul_carrier_id,t_id=ceiling((SFN×10× ^2k +slot_id) /x)mod(10×2 ^k ), wherein the s_id is the identifier of the first OFDM symbol, the f_id is the identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, and the The t_id is the first identifier, the slot_id is the identifier of the time slot, the x is the first value, the ceiling function represents a round-up operation, the mod represents a remainder operation, and the k is used to represent a subcarrier spacing parameter, where k is an integer greater than or equal to 0.

Wherein, the RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id, where t_id=ceiling((SFN_id×80+slot_id)/x)mod(80) , wherein the s_id is the identifier of the first OFDM symbol, the f_id is the identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, the t_id is the first identifier, and the The slot_id is the identifier of the time slot, the x is the first value, the ceiling function represents a round-up operation, and the mod represents a remainder operation.

Wherein, the first value is a value of the period of the physical random access channel opportunity PRACHoccasion for sending the random access preamble.

In another embodiment:

A receiving module 701, configured to receive a random access preamble sent by a terminal device;

The processing module 702 is configured to transmit the random access preamble according to the identifier of the subframe in which the terminal device sends the random access preamble, the identifier of the frequency domain in which the terminal device sends the random access preamble, and the terminal device to send the random access preamble. The identifier of the uplink carrier of the random access preamble, the system frame number SFN where the terminal device sends the random access preamble, and the physical random access channel opportunity for the terminal device to send the random access preamble PRACH occasion at least one of the values of the period determines the random access-radio network temporary identity RA-RNTI;

A sending module 703, configured to send a random access response RAR to the terminal device, where the RAR is identified by the RA-RNTI.

Wherein, the RA-RNTI=1+t_id+10×f_id+10× ^2k ul_carrier_id+10× ^2k ×2×(SFNmod ceiling(periodicity/y)), wherein the t_id is the subframe’s identifier, the f_id is the identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, the periodicity is the value of the period, the ceiling function represents the round-up operation, and the mod represents the remainder operation, the k is used to represent the subcarrier spacing parameter, the k is an integer greater than or equal to 0, and the y is the duration of the system frame.

Wherein, the RA-RNTI=1+t_id+10×f_id+80ul_carrier_id+80×2×(SFN modceiling(periodicity/y)), wherein the t_id is the identifier of the subframe, and the f_id is the The identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, the periodicity is the value of the period, the ceiling function represents the round-up operation, the mod represents the remainder operation, and the y is the system The duration of the frame.

It should be noted that, the implementation of each module may also correspond to the corresponding descriptions of the method embodiments shown in FIG. 2 and FIG. 5 , to execute the methods and functions performed by the network device in the foregoing embodiments.

Please continue to refer to FIG. 8 , which is a schematic structural diagram of another terminal device provided by an embodiment of the present application. As shown in FIG. 8 , the terminal device may include: at least one processor 801 , at least one communication interface 802 , at least one memory 803 and at least one communication bus 804 .

The processor 801 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute the various exemplary logical blocks, modules and circuits described in connection with this disclosure. The processor may also be a combination that performs computing functions, such as a combination comprising one or more microprocessors, a combination of a digital signal processor and a microprocessor, and the like. The communication bus 804 may be a peripheral component interconnection standard PCI bus or an extended industry standard structure EISA bus, or the like. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of presentation, only one thick line is used in FIG. 8, but it does not mean that there is only one bus or one type of bus. The communication bus 804 is used to implement the connection communication between these components. The communication interface 802 of the device in the embodiment of the present application is used for signaling or data communication with other node devices. The memory 803 may include volatile memory, such as nonvolatile dynamic random access memory (NVRAM), phase change random access memory (PRAM), magnetoresistive random access memory (magetoresistive RAM) , MRAM), etc., can also include non-volatile memory, such as at least one magnetic disk storage device, electronically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), flash memory devices, such as NOR flash memory), or NAND flash memory, semiconductor devices, such as solid state disks (SSD). Optionally, the memory 803 may also be at least one storage device located away from the aforementioned processor 801 . Optionally, the memory 803 can also store a set of program codes, and the processor 801 can also optionally execute the program executed in the memory 803 .

Send the random access preamble to the network device through the communication interface 802;

According to the identifier of the first OFDM symbol that transmits the random access preamble, the identifier of the frequency domain where the random access preamble is transmitted, and the identifier of the uplink carrier that transmits the random access preamble At least one of the identifier and the first identifier determines a random access-radio network temporary identifier RA-RNTI, wherein the first identifier sends the random access preamble according to the system frame number SFN for sending the random access preamble. at least one of the identification of the time slot of the preamble and a first numerical value is determined, and the first numerical value is a positive integer;

The random access response RAR sent by the network device is received through the communication interface 802 according to the RA-RNTI.

Wherein, the RA-RNTI=1+s_id+14×t_id+14×8× ^2k ×f_id+14×8× ^2k ×8×ul_carrier_id,t_id=ceiling((SFN×8× ^2k +slot_id) /x)mod(8×2 ^k ), wherein the s_id is the identifier of the first OFDM symbol, the f_id is the identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, and the The t_id is the first identifier, the slot_id is the identifier of the time slot, the x is the first value, the ceiling function represents a round-up operation, the mod represents a remainder operation, and the k is used to represent a subcarrier spacing parameter, where k is an integer greater than or equal to 0.

Wherein, the RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id, where t_id=ceiling((SFN_id×80+slot_id)/x)mod(80) , wherein the s_id is the identifier of the first OFDM symbol, the f_id is the identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, the t_id is the first identifier, and the The slot_id is the identifier of the time slot, the x is the first value, the ceiling function represents a round-up operation, and the mod represents a remainder operation.

Wherein, the first value is a value of the period of the physical random access channel opportunity PRACHoccasion for sending the random access preamble.

In another embodiment:

Send the random access preamble to the network device through the communication interface 802;

According to the identifier of the subframe that sends the random access preamble, the identifier of the frequency domain where the random access preamble is sent, the identifier of the uplink carrier that sends the random access preamble, the random access preamble is sent at least one of the system frame number SFN of the code and the value of the period of the physical random access channel opportunity PRACH occasion for transmitting the random access preamble to determine the random access-radio network temporary identifier RA-RNTI;

The random access response RAR sent by the network device is received through the communication interface 802 according to the RA-RNTI.

Wherein, the RA-RNTI=1+t_id+8×f_id+8× ^2k ul_carrier_id+8× ^2k ×2×(SFNmod ceiling(periodicity/y)), wherein the t_id is the subframe’s identifier, the f_id is the identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, the periodicity is the value of the period, the ceiling function represents the round-up operation, and the mod represents the remainder operation, the k is used to represent the subcarrier spacing parameter, the k is an integer greater than or equal to 0, and the y is the duration of the system frame.

Wherein, the RA-RNTI=1+t_id+8×f_id+80ul_carrier_id+80×2×(SFN modceiling(periodicity/y)), wherein the t_id is the identifier of the subframe, and the f_id is the The identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, the periodicity is the value of the period, the ceiling function represents the round-up operation, the mod represents the remainder operation, and the y is the system The duration of the frame.

Further, the processor may also cooperate with the memory and the communication interface to perform the operations of the terminal device in the above application embodiments.

Please continue to refer to FIG. 9 , which is a schematic structural diagram of another network device provided by an embodiment of the present application. As shown in the figure, the network device may include: at least one processor 901 , at least one communication interface 902 , at least one memory 903 and at least one communication bus 904 .

The processor 901 may be various types of processors mentioned above. The communication bus 904 may be a peripheral component interconnection standard PCI bus, an extended industry standard structure EISA bus, or the like. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of presentation, only one thick line is used in FIG. 9, but it does not mean that there is only one bus or one type of bus. The communication bus 904 is used to implement the connection communication between these components. The communication interface 902 of the device in the embodiment of the present application is used for signaling or data communication with other node devices. The memory 903 may be the various types of memory mentioned above. Optionally, the memory 903 may also be at least one storage device located away from the aforementioned processor 901 . A set of program codes is stored in the memory 903 , and the processor 901 executes the program executed by the above-mentioned OAM in the memory 903 .

receiving the random access preamble sent by the terminal device through the communication interface 902;

According to the identifier of the first OFDM symbol in which the terminal device sends the random access preamble, the identifier of the frequency domain where the terminal device sends the random access preamble, the terminal device At least one of the identifier of the uplink carrier that sends the random access preamble and the first identifier determines the random access-wireless network temporary identifier RA-RNTI, wherein the first identifier sends the random access Determine at least one of the system frame number SFN of the access preamble, the identifier of the time slot where the terminal device sends the random access preamble, and a first value, where the first value is a positive integer;

A random access response RAR is sent to the terminal device through the communication interface 902, where the RAR is identified by the RA-RNTI.

Wherein, the RA-RNTI=1+s_id+14×t_id+14×10× ^2k ×f_id+14×10× ^2k ×8×ul_carrier_id,t_id=ceiling((SFN×10× ^2k +slot_id) /x)mod(10×2 ^k ), wherein the s_id is the identifier of the first OFDM symbol, the f_id is the identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, and the The t_id is the first identifier, the slot_id is the identifier of the time slot, the x is the first value, the ceiling function represents a round-up operation, the mod represents a remainder operation, and the k is used to represent a subcarrier spacing parameter, where k is an integer greater than or equal to 0.

Wherein, the RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id, where t_id=ceiling((SFN_id×80+slot_id)/x)mod(80) , wherein the s_id is the identifier of the first OFDM symbol, the f_id is the identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, the t_id is the first identifier, and the The slot_id is the identifier of the time slot, the x is the first value, the ceiling function represents a round-up operation, and the mod represents a remainder operation.

Wherein, the first value is a value of the period of the physical random access channel opportunity PRACHoccasion for sending the random access preamble.

In another embodiment:

Receive the random access preamble sent by the terminal device through the communication interface 902;

According to the identifier of the subframe in which the terminal device sends the random access preamble, the identifier of the frequency domain in which the terminal device sends the random access preamble, and the identifier of the subframe where the terminal device sends the random access preamble The identifier of the uplink carrier, the system frame number SFN where the terminal device sends the random access preamble, and the value of the period of the physical random access channel opportunity PRACH occasion where the terminal device sends the random access preamble at least one determined random access-wireless network temporary identity RA-RNTI;

A random access response RAR is sent to the terminal device through the communication interface 902, where the RAR is identified by the RA-RNTI.

Wherein, the RA-RNTI=1+t_id+10×f_id+10× ^2k ul_carrier_id+10× ^2k ×2×(SFNmod ceiling(periodicity/y)), wherein the t_id is the subframe’s identifier, the f_id is the identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, the periodicity is the value of the period, the ceiling function represents the round-up operation, and the mod represents the remainder operation, the k is used to represent the subcarrier spacing parameter, the k is an integer greater than or equal to 0, and the y is the duration of the system frame.

Wherein, the RA-RNTI=1+t_id+10×f_id+80ul_carrier_id+80×2×(SFN modceiling(periodicity/y)), wherein the t_id is the identifier of the subframe, and the f_id is the The identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, the periodicity is the value of the period, the ceiling function represents the round-up operation, the mod represents the remainder operation, and the y is the system The duration of the frame.

Further, the processor may also cooperate with the memory and the communication interface to execute the operations of the network device in the above-mentioned embodiments of the application.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server or data center Transmission to another website site, computer, server, or data center is by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes an integration of one or more available media. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVDs), or semiconductor media (eg, solid state disks (SSDs)), and the like.

An embodiment of the present application further provides a communication system, where the communication system includes: the above-mentioned terminal device, and/or the above-mentioned network device.

The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present application in detail. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims (33)

1. A random access method, comprising: The terminal device sends a random access preamble to the network device; The terminal device sends the random access preamble according to the identifier of the first OFDM symbol that sends the random access preamble and the identifier of the frequency domain where the random access preamble is sent. At least one of the identifier of the uplink carrier and the first identifier determines the random access-radio network temporary identifier RA-RNTI, wherein the first identifier is based on the system frame number SFN for sending the random access preamble, at least one of the identifier of the time slot of the random access preamble and a first numerical value is determined, and the first numerical value is a positive integer; The terminal device receives the random access response RAR sent by the network device according to the RA-RNTI. 2. The method of claim 1, wherein the RA-RNTI=1+s_id+14×t_id+14×10× ^2k ×f_id+14×10× ^2k ×8×ul_carrier_id,t_id =ceiling((SFN×10×2 ^k +slot_id)/x)mod(10×2 ^k ), wherein the s_id is the identifier of the first OFDM symbol, and the f_id is the identifier of the frequency domain , the ul_carrier_id is the identifier of the uplink carrier, the t_id is the first identifier, the slot_id is the identifier of the time slot, the x is the first value, and the ceiling function represents an upward Integer operation, the mod represents the remainder operation, the k is used to represent the subcarrier spacing parameter, and the k is an integer greater than or equal to 0. 3. The method of claim 1, wherein the RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id, wherein t_id=ceiling(( SFN_id×80+slot_id)/x)mod(80), wherein the s_id is the identifier of the first OFDM symbol, the f_id is the identifier of the frequency domain, and the ul_carrier_id is the identifier of the uplink carrier identifier, the t_id is the first identifier, the slot_id is the identifier of the time slot, the x is the first value, the ceiling function represents the round-up operation, and the mod represents the remainder operation . 4. The method according to any one of claims 1-3, wherein the first value is a value of a period of a physical random access channel opportunity (PRACH occasion) that transmits the random access preamble. 5. A random access method, comprising: The terminal device sends a random access preamble to the network device; The terminal device sends the random access preamble according to the identifier of the subframe in which the random access preamble is sent, the identifier of the frequency domain in which the random access preamble is sent, the identifier of the uplink carrier that sends the random access preamble, and sends the random access preamble. At least one of the system frame number SFN of the random access preamble and the value of the period of the physical random access channel opportunity PRACH occasion for transmitting the random access preamble determines the random access-radio network temporary identifier RA-RNTI; The terminal device receives the random access response RAR sent by the network device according to the RA-RNTI. 6. The method of claim 5, wherein the RA-RNTI=1+t_id+10×f_id+10× ^{2kul_carrier_id} +10× ^2k ×2×(SFN mod ceiling(periodicity/y )), wherein the t_id is the identifier of the subframe, the f_id is the identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, the periodicity is the value of the period, the The ceiling function represents an upward rounding operation, the mod represents a remainder operation, the k is used to represent a subcarrier interval parameter, the k is an integer greater than or equal to 0, and the y is the duration of the system frame. 7. The method of claim 5, wherein the RA-RNTI=1+t_id+10×f_id+80ul_carrier_id+80×2×(SFN mod ceiling(periodicity/y)), wherein the t_id is the identifier of the subframe, the f_id is the identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, the periodicity is the value of the period, and the ceiling function represents a round-up operation , the mod represents the remainder operation, and the y is the duration of the system frame. 8. A random access method, comprising: The network device receives the random access preamble sent by the terminal device; The network device transmits the random access preamble according to the identifier of the first OFDM symbol in which the terminal device sends the random access preamble, the identifier of the frequency domain where the terminal device sends the random access preamble, At least one of the identifier of the uplink carrier on which the terminal device sends the random access preamble and the first identifier determines the random access-wireless network temporary identifier RA-RNTI, wherein the first identifier is based on the terminal device Determine at least one of the system frame number SFN for sending the random access preamble, the identifier of the time slot where the terminal device sends the random access preamble, and a first value, where the first value is a positive integer; The network device sends a random access response RAR to the terminal device, where the RAR is identified by the RA-RNTI. 9. The method of claim 8, wherein the RA-RNTI=1+s_id+14×t_id+14×10× ^2k ×f_id+14×10× ^2k ×8×ul_carrier_id,t_id =ceiling((SFN×10×2 ^k +slot_id)/x)mod(10×2 ^k ), wherein the s_id is the identifier of the first OFDM symbol, and the f_id is the identifier of the frequency domain , the ul_carrier_id is the identifier of the uplink carrier, the t_id is the first identifier, the slot_id is the identifier of the time slot, the x is the first value, and the ceiling function represents an upward Integer operation, the mod represents the remainder operation, the k is used to represent the subcarrier spacing parameter, and the k is an integer greater than or equal to 0. 10. The method of claim 8, wherein the RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id, wherein t_id=ceiling(( SFN_id×80+slot_id)/x)mod(80), wherein the s_id is the identifier of the first OFDM symbol, the f_id is the identifier of the frequency domain, and the ul_carrier_id is the identifier of the uplink carrier identifier, the t_id is the first identifier, the slot_id is the identifier of the time slot, the x is the first value, the ceiling function represents the round-up operation, and the mod represents the remainder operation . 11. The method according to any one of claims 8-10, wherein the first value is a value of a period of a physical random access channel opportunity (PRACH occasion) that transmits the random access preamble. 12. A random access method, comprising: The network device receives the random access preamble sent by the terminal device; The network device transmits the random access preamble according to the identifier of the subframe in which the terminal device sends the random access preamble, the identifier of the frequency domain in which the terminal device sends the random access preamble, and the terminal device sends the random access preamble. The identifier of the uplink carrier into which the preamble is entered, the system frame number SFN where the terminal device sends the random access preamble, and the period of the physical random access channel opportunity PRACH occasion where the terminal device sends the random access preamble At least one of the values of the Random Access-Radio Network Temporary Identity RA-RNTI is determined; The network device sends a random access response RAR to the terminal device, where the RAR is identified by the RA-RNTI. 13. The method of claim 12, wherein the RA-RNTI=1+t_id+10×f_id+10× ^{2kul_carrier_id} +10× ^2k ×2×(SFN mod ceiling(periodicity/y )), wherein the t_id is the identifier of the subframe, the f_id is the identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, the periodicity is the value of the period, the The ceiling function represents an upward rounding operation, the mod represents a remainder operation, the k is used to represent a subcarrier interval parameter, the k is an integer greater than or equal to 0, and the y is the duration of the system frame. 14. The method of claim 12, wherein the RA-RNTI=1+t_id+10×f_id+80ul_carrier_id+80×2×(SFN mod ceiling(periodicity/y)), wherein the t_id is the identifier of the subframe, the f_id is the identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, the periodicity is the value of the period, and the ceiling function represents a round-up operation , the mod represents the remainder operation, and the y is the duration of the system frame. 15. A terminal device, comprising: a sending module, configured to send a random access preamble to the network device; a processing module, configured to send the random access preamble according to the identifier of the first OFDM symbol for sending the random access preamble and the identifier of the frequency domain for sending the random access preamble At least one of the identifier of the uplink carrier of the code and the first identifier determine the random access-radio network temporary identifier RA-RNTI, wherein the first identifier is based on the system frame number SFN for sending the random access preamble, the transmission at least one of an identifier of the time slot of the random access preamble and a first numerical value is determined, and the first numerical value is a positive integer; A receiving module, configured to receive a random access response RAR sent by the network device according to the RA-RNTI. The terminal device according to claim 15, wherein the RA-RNTI=1+s_id+14×t_id+14×10× ^2k ×f_id+14×10× ^2k ×8×ul_carrier_id, t_id=ceiling((SFN×10×2 ^k +slot_id)/x)mod(10×2 ^k ), wherein the s_id is the identifier of the first OFDM symbol, and the f_id is the frequency domain identifier, the ul_carrier_id is the identifier of the uplink carrier, the t_id is the first identifier, the slot_id is the identifier of the time slot, the x is the first value, and the ceiling function represents the upward In the rounding operation, the mod represents a remainder operation, the k is used to represent a subcarrier spacing parameter, and the k is an integer greater than or equal to 0. 17. The terminal device according to claim 15, wherein the RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id, wherein t_id=ceiling( (SFN_id×80+slot_id)/x)mod(80), wherein the s_id is the identifier of the first OFDM symbol, the f_id is the identifier of the frequency domain, and the ul_carrier_id is the uplink carrier The identifier of the t_id is the first identifier, the slot_id is the identifier of the time slot, the x is the first value, the ceiling function represents the round-up operation, and the mod represents the remainder operation. 18. The terminal device according to any one of claims 15-17, wherein the first value is a value of a period of a physical random access channel opportunity (PRACH occasion) that transmits the random access preamble. 19. A terminal device, comprising: a sending module, configured to send a random access preamble to the network device; The processing module is configured to transmit the random access preamble according to the identification of the subframe in which the random access preamble is sent, the identification of the frequency domain in which the random access preamble is transmitted, the identification of the uplink carrier that transmits the random access preamble, and the at least one of the system frame number SFN of the random access preamble and the value of the period of the physical random access channel opportunity PRACH occasion for sending the random access preamble to determine the random access-radio network temporary identifier RA-RNTI; A receiving module, configured to receive a random access response RAR sent by the network device according to the RA-RNTI. 20. The terminal device according to claim 19, wherein the RA-RNTI=1+t_id+10×f_id+10× ^{2kul_carrier_id} +10× ^2k ×2×(SFN mod ceiling(periodicity/ y)), wherein the t_id is the identifier of the subframe, the f_id is the identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, the periodicity is the value of the period, and the The ceiling function represents an upward rounding operation, the mod represents a remainder operation, the k is used to represent a subcarrier spacing parameter, the k is an integer greater than or equal to 0, and the y is the duration of the system frame. 21. The terminal device according to claim 19, wherein the RA-RNTI=1+t_id+10×f_id+80ul_carrier_id+80×2×(SFN mod ceiling(periodicity/y)), wherein the The t_id is the identifier of the subframe, the f_id is the identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, the periodicity is the value of the period, and the ceiling function represents an upward rounding operation, the mod represents the remainder operation, and the y is the duration of the system frame. 22. A network device, comprising: a receiving module, configured to receive the random access preamble sent by the terminal device; a processing module, configured to transmit the random access preamble according to the identifier of the first OFDM symbol of the terminal device and the identifier of the frequency domain where the terminal device sends the random access preamble . At least one of the identifier of the uplink carrier on which the terminal device sends the random access preamble and the first identifier determine the random access-radio network temporary identifier RA-RNTI, wherein the first identifier is based on the terminal Determine at least one of the system frame number SFN where the device sends the random access preamble, the identifier of the time slot where the terminal device sends the random access preamble, and a first value, where the first value is a positive integer ; A sending module, configured to send a random access response RAR to the terminal device, where the RAR is identified by the RA-RNTI. 23. The network device according to claim 22, wherein the RA-RNTI=1+s_id+14×t_id+14×10× ^2k ×f_id+14×10× ^2k ×8×ul_carrier_id, t_id=ceiling((SFN×10×2 ^k +slot_id)/x)mod(10×2 ^k ), wherein the s_id is the identifier of the first OFDM symbol, and the f_id is the frequency domain identifier, the ul_carrier_id is the identifier of the uplink carrier, the t_id is the first identifier, the slot_id is the identifier of the time slot, the x is the first value, and the ceiling function represents the upward In the rounding operation, the mod represents a remainder operation, the k is used to represent a subcarrier spacing parameter, and the k is an integer greater than or equal to 0. 24. The network device of claim 22, wherein the RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id, wherein t_id=ceiling( (SFN_id×80+slot_id)/x)mod(80), wherein the s_id is the identifier of the first OFDM symbol, the f_id is the identifier of the frequency domain, and the ul_carrier_id is the uplink carrier The identifier of the t_id is the first identifier, the slot_id is the identifier of the time slot, the x is the first value, the ceiling function represents the round-up operation, and the mod represents the remainder operation. 25. The network device according to any one of claims 22-24, wherein the first value is a value of a period of a physical random access channel opportunity (PRACH occasion) that transmits the random access preamble. 26. A network device, comprising: a receiving module, configured to receive the random access preamble sent by the terminal device; a processing module, configured to send the random access preamble according to the identifier of the subframe in which the terminal device sends the random access preamble, the identifier of the frequency domain in which the terminal device sends the random access preamble, and the random access preamble sent by the terminal device. The identifier of the uplink carrier of the access preamble, the system frame number SFN where the terminal device sends the random access preamble, and the physical random access channel opportunity PRACH occasion where the terminal device sends the random access preamble at least one of the values of the period determines the random access-radio network temporary identity RA-RNTI; A sending module, configured to send a random access response RAR to the terminal device, where the RAR is identified by the RA-RNTI. 27. The network device of claim 26, wherein the RA-RNTI=1+t_id+10×f_id+10× ^{2kul_carrier_id} +10× ^2k ×2×(SFN mod ceiling(periodicity/ y)), wherein the t_id is the identifier of the subframe, the f_id is the identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, the periodicity is the value of the period, and the The ceiling function represents an upward rounding operation, the mod represents a remainder operation, the k is used to represent a subcarrier spacing parameter, the k is an integer greater than or equal to 0, and the y is the duration of the system frame. 28. The network device of claim 26, wherein the RA-RNTI=1+t_id+10×f_id+80ul_carrier_id+80×2×(SFN mod ceiling(periodicity/y)), wherein the The t_id is the identifier of the subframe, the f_id is the identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, the periodicity is the value of the period, and the ceiling function represents an upward rounding operation, the mod represents the remainder operation, and the y is the duration of the system frame. 29. A terminal device, characterized by comprising: a memory, a communication bus and a processor, wherein the memory is used to store program codes, and the processor is used to call the program codes for executing claims 1- 7. The method of any one. 30. A network device, comprising: a memory, a communication bus and a processor, wherein the memory is used to store program codes, and the processor is used to call the program codes for executing claims 8- The method of any one of 14. 31. A computer-readable storage medium, wherein instructions are stored in the computer-readable storage medium, which, when executed on a computer, cause the computer to perform the method of any one of claims 1-14. 32. A computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1-14. 33. A communication system, characterized in that it comprises a network device and a terminal device, the network device is the network device according to any one of claims 22 to 28 or 30, and the terminal device is the network device according to claim 15 to 30 . Any one of 21 or the terminal device described in 29.

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