WO2010111820A1 - RANDOM ACCESS METHOD, eNodeB AND TERMINAL EQUIPMENT - Google Patents

Abstract

A random access method, an eNodeB and a terminal equipment are disclosed. The method includes the following steps: determining one or more composition carriers needed to be sensed by the user equipment(UE) in the discontinuous reception(DRX) state, informing the UE of the one or more composition carriers, and transmitting the random access response message on one of the determined one or more composition carriers after receiving the dedicated random access preamble sent by the UE. Therefore the eNodeB could determine the downlink carrier sensed by the UE when the UE is in the noncompetitive random access process of the DRX state, the utilization ratio of the downlink resource is increased, and the power consumption of the UE is reduced.

Description

 Random access method, evolved base station and terminal device

 The present invention relates to communication technologies, and in particular, to a random access method, an evolved base station, and a terminal device. Background technique

 With the development of wireless communication technology, in order to meet the requirements of (IMT-Advanced, International Mobile Telecommunication Advanced) and support peak data rates of up to 1 G, long-term evolution systems have now adopted carrier aggregation technology as a method of expanding system bandwidth. Carrier aggregation mainly aggregates multiple component carriers into a carrier higher than 20M to support high-speed data transmission. Currently, Long Term Evolution (LTE, Long Term Evolution) or Advanced Long Term Evolution (LTE-A,

The Long Term Evolution-advanced system needs to support asymmetric carrier aggregation. In general, the number of downlink component carriers is greater than the number of uplink component carriers. For example, the downlink bandwidth is 80MHz, which is composed of four 20MHz component carriers; the uplink bandwidth is 20MHz, and is composed of one 20MHz component carrier. In the current long-term evolution system, the non-contention random access procedure includes: when the user equipment (UE, User Equipment) is in a discontinuous reception (DRX) state, the UE may be in the downlink data arrival. In the uplink out-of-synchronization state, the evolved base station (eNB, eNodeB) needs to notify the UE to initiate a random access procedure to the eNB through the Physical Downlink Control Channel (PDCCH), thereby acquiring uplink synchronization. At the same time, the eNB may allocate a dedicated random access preamble (reamble) to the UE through the PDCCH, so that the UE initiates a non-contention random access procedure to the eNB by using the dedicated random access Preamble. However, after the carrier aggregation technology is introduced in the LTE system, after the UE initiates a random access request to the eNB by using the dedicated random access Preamble for the non-contention random access procedure in the DRX state, the eNB cannot determine that the UE is in the UE. Which component carriers are receiving data, or which component carriers are being monitored, that is, the eNB does not know the exact component carrier that should send the random access response message. In order for the UE to receive the data, the eNB needs to send random connections on all component carriers. In response message, As a result, the downlink resources are wasted; at the same time, the UE needs to listen to all component carriers, which increases the power consumption of the UE. Summary of the invention

 The embodiment of the present invention provides a random access method, an evolved base station, and a terminal device, so that the eNB can determine the downlink carrier monitored by the UE in the non-contention random access process in the DRX state, and improve the utilization of downlink resources. , reduce the power consumption of the UE. In order to solve the above technical problem, the present invention provides a random access method, including: determining one or more component carriers that a user equipment needs to monitor in a discontinuous reception state; and notifying the one or more component carriers User equipment

 After receiving the dedicated random access preamble sent by the user equipment, the random access response message is sent on one of the determined component carriers or one of the component carriers.

 The embodiment of the present invention further provides a random access method, including:

 Receiving, by the evolved base station, a notification that one or more component carriers that the user equipment needs to listen to; and monitoring one or more component carriers that need to be monitored in the notification;

 After the dedicated random access preamble is sent to the evolved base station, the random access response message sent by the evolved base station is received on one of the component carriers or one of the component carriers.

 Correspondingly, an embodiment of the present invention provides an evolved base station, including:

 a determining unit, configured to determine one or more component carriers that the user equipment needs to monitor in a discontinuous reception state;

 a notification unit, configured to notify the user equipment of one or more component carriers determined by the determining unit, a message receiving unit, configured to receive, by the user equipment, a dedicated random access preamble, and a message response unit, configured to receive at the message receiving unit After the dedicated random access preamble, a random access response message is sent on one of the one or more component carriers determined by the determining unit.

 The embodiment of the invention further provides a terminal device, including:

a receiving unit, configured to receive, by the evolved base station, a notification that one or more component carriers that the user equipment needs to monitor; a monitoring unit, configured to monitor, by the receiving unit, one or more component carriers that need to be monitored in the notification;

 a message sending unit, configured to send a dedicated random access preamble to the evolved base station;

 The message receiving unit is configured to: after transmitting the dedicated random access preamble, receive a random access response message sent by the evolved base station on one of the component carriers or one of the component carriers that are monitored.

 According to the foregoing solution, the embodiment of the present invention informs the UE by using one or more component carriers that the UE needs to monitor, so that after the UE sends the random access request, the UE monitors the PDCCH on the one or more component carriers, so as to facilitate the monitoring. The component carrier receives the random access response message, thereby reducing the power consumption of the UE. At the same time, after receiving the dedicated random access Preamble, the eNB also knows which component carriers need to send the random access response message, Increased utilization of downstream resources.

DRAWINGS

 FIG. 1 is a flowchart of a method for random access provided in an embodiment of the present invention;

 2 is a flowchart of another method for random access provided in an embodiment of the present invention; FIG. 3 is a flowchart of a random access method according to Embodiment 1 of the present invention;

 4 is a flowchart of a method for random access provided in Embodiment 2 of the present invention; FIG. 5 is a flowchart of a method for random access provided in Embodiment 3 of the present invention; A schematic structural diagram of an evolved base station is provided in the example;

 7 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;

 FIG. 8 is a schematic structural diagram of a random access system according to an embodiment of the present invention.

detailed description

 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

 FIG. 1 is a flowchart of a method for random access provided in an embodiment of the present invention, where the method includes:

 Step 101: Determine one or more component carriers that the user equipment UE needs to monitor in the DRX state.

 Step 102: Notifying the UE of one or more component carriers that need to be monitored;

Step 103: After receiving the dedicated random access preamble (Preamble) sent by the UE, Sending a random access response message on one of the determined component carriers or one of the plurality of component carriers.

 Correspondingly, the embodiment of the present invention further provides a method for random access, and a flowchart thereof is shown in FIG. 2, and the method includes:

 Step 201: Receive a notification that one or more component carriers that the UE needs to listen to are sent by the evolved base station eNB;

 Step 202: Listen to one or more component carriers that need to be monitored in the notification.

 Step 203: After sending the dedicated random access Preamble to the eNB, receiving a random access response message sent by the eNB on one of the component carriers or one of the component carriers.

 In the embodiment of the present invention, the evolved base station eNB may notify the UE of one or more component carriers that need to be monitored when entering the DRX state when transmitting the DRX (Discontinuous Reception) command to the UE; the DRX command is It is used to force the UE to enter the sleep state, that is, when the UE receives the command, it enters the sleep state. The DRX command is a medium access control layer protocol data unit, or a physical layer message, or a radio resource control layer message; or a dedicated message may be used to notify the UE that at least one of the monitored ones needs to be monitored when entering the discontinuous reception DRX state. The plurality of component carriers, the dedicated message is: a DRX listening carrier command message. The DRX Listening Carrier Command message is used to notify the UE of the component carriers that need to be monitored in the DRX state. The embodiments of the present invention are not limited.

 For the embodiments of the present invention, the following mainly describes three preferred embodiments, but is not limited thereto. First preferred embodiment:

In this embodiment, after determining the component carrier that the user equipment UE needs to listen at least in the DRX state, the evolved base station eNB notifies the UE that the determined UE needs to listen to at least one component carrier when entering the discontinuous reception DRX state; After receiving the notification, the UE monitors the physical downlink control channel PDCCH on the one or more component carriers, and after acquiring the dedicated random access preamble, sends a dedicated random access Preamble to the eNB; After receiving the dedicated random access Preamble, the UE sends a random access response message on at least one of the one or more component carriers that are notified, and the UE sends a dedicated random access to the eNB. After the Preamble, the random access response message is received on the one or more component carriers. The specific implementation process is detailed in the first embodiment.

 Embodiment 1

 Referring to FIG. 3, a flowchart of a random access method is provided in Embodiment 1 of the present invention. In this embodiment, an eNB is a serving eNB of a UE, and the method includes the following:

 Step 300: The eNB determines a component carrier that the user equipment UE needs to listen to at least in the DRX state. Specifically, the eNB may determine, according to the component carrier that the UE can support and/or the current ongoing service requirement, the component carrier that the UE needs to listen at least.

 Step 301: The eNB sends a DRX command to the UE to notify the UE to enter a DRX state. In the DRX command, the eNB needs to notify the UE of the component carrier that needs to be monitored at least when it enters the DRX state (the component carrier may be one, or may be The DRX command is used to force the UE to enter a sleep state, that is, when the UE receives the command, it enters a sleep state.

 That is, in this embodiment, the eNB may include, in the sent DRX command, one or more component carriers that the UE needs to monitor when in the DRX state. The DRX command may be a medium access control layer message, a physical layer message, or a radio resource control layer message. That is, a medium access control (MAC) protocol data unit (PDU) may be used, and a high-level message, such as a radio resource control layer (RRC, Radio Resource Control) message, may also be used. It can also be low-level messages, such as physical layer messages.

 Of course, in the embodiment of the present invention, the eNB may send a dedicated message to the UE to notify the UE of one or more component carriers that need to be monitored when entering the DRX state, which is not limited in the embodiment of the present invention.

 Step 302: After receiving the DRX command sent by the eNB, the UE listens to one or more component carriers in the command indicating that the component needs to be monitored.

 That is, after receiving the DRX command, the PDCCH channel on the component carrier indicated in the DRX command is monitored during the active time, or when the wakeup time arrives, or during the "on duration" phase.

 Step 303: When the eNB receives the downlink data of the UE, it determines whether the UE is in the uplink synchronization state, and if yes, sends the downlink data of the UE to the UE (not shown); if not, the UE is in the uplink out-of-synchronization state. , step 304 is performed;

Step 304: The eNB allocates a physical downlink control channel (PDCCH, Physical Downlink) to the UE. And a dedicated random access preamble (preamble) to instruct the UE to perform a random access procedure to obtain uplink synchronization; wherein, by using the PDCCH allocated for the UE, the eNB allocates a dedicated random access preamble to the UE. ( preamble ).

 Step 305: After receiving the dedicated random access preamble, the UE sends a dedicated random access Preamble to the eNB.

 After transmitting the dedicated random access Preamble, the UE receives the random access response message on the component carrier determined by the eNB, that is, the DRX command or one or more component carriers indicated in the dedicated indication message.

 Step 306: After receiving the dedicated random access Preamble, the eNB sends a random access response message on at least one component carrier of the one or more component carriers that are notified.

 That is, if, in step 301, the eNB determines only one component carrier that needs to be monitored in the DRX state for the UE, the eNB is in the determined component carrier after receiving the dedicated random access Preamble sent by the UE. Sending a random access response message;

 If the eNB determines, for the UE, a plurality of component carriers that need to be monitored in the DRX state, the eNB sends a random random transmission on the one of the determined component carriers after receiving the dedicated random access Preamble sent by the UE. The access response message is sent to the UE. Of course, the random access response message may also be sent to the UE on multiple determined component carriers.

 Certainly, in step 301, if the eNB informs the UE of one or more component carriers that need to be monitored when entering the DRX state through a dedicated indication message, in this step 306, after transmitting the dedicated random access Preamble to the eNB, the eNB may pass A random access response message is received on the component carrier indicated in the dedicated message. The specific implementation process is similar, and will not be described here.

In the embodiment of the present invention, when the eNB sends a DRX command to the UE, the UE notifies the UE of one or more component carriers that need to be monitored when entering the DRX state, and after receiving the DRX command, the UE enters a DRX state, and sends a dedicated to the eNB. After random access to the Preamble, the random access response message is received on the component carrier indicated in the DRX command. After receiving the dedicated random access Preamble, the eNB sends a random access response message on a component carrier that informs the UE or on any one of the multiple component carriers. Therefore, in the random access process when the downlink data is reached and the uplink is out of synchronization, when the eNB sends the DRX command to the UE, the eNB informs the UE of the component carriers that need to be monitored, so that when the UE accesses the eNB, it sends the dedicated to the eNB. When you access the Preamble randomly, you can clearly need to listen The carrier is configured to reduce the power consumption of the UE. At the same time, when receiving the dedicated random access Preamble, the eNB sends a random access response message to the component carrier that is notified to the UE in advance, thereby saving downlink radio resources. .

 A second preferred embodiment:

 In this embodiment, before the UE enters the discontinuous reception DRX state, the evolved base station eNB and

The UE negotiates the component carriers that the UE should listen to during the active state, and determines, according to the result of the negotiation, the component carriers that the UE needs to listen at least when the uplink is out of synchronization. And the component carrier that the user equipment UE needs to monitor at least in the DRX state is notified to the UE. In order to receive a DRX command sent by the eNB, the UE determines a component carrier from the component carriers that need to be monitored at least when the UE is out of synchronization, and listens to the PDCCH on the component carrier, and sends the PDCCH on the component carrier. After the dedicated random access preamble is sent, the dedicated random access Preamble is sent to the eNB, and after receiving the dedicated random access Preamble, the eNB sends a random access response message on the component carrier that the predetermined UE needs to listen at least. The specific implementation process is detailed in the second embodiment.

 Embodiment 2

 FIG. 4 is a flowchart of a method for random access provided in Embodiment 2 of the present invention; the method includes:

 Step 400: Before the UE enters the discontinuous reception DRX state, determining that the UE needs to listen to at least the component carrier when the uplink is out of synchronization, and notifying the UE of the component carrier that needs to be monitored at least;

 That is, the evolved base station eNB negotiates with the UE the component carriers that should be monitored during the active state before the UE enters the discontinuous reception DRX state, and determines one or more components that the UE needs to listen at least when the uplink is out of synchronization according to the result of the negotiation. Carrier, and notifying the UE of at least one component carrier that needs to be monitored;

 Specifically, the determination may be negotiated in a static, semi-static or dynamic manner. The so-called static mode refers to determining, by the system, a certain algorithm to determine the component carrier that the UE needs to monitor when entering the DRX. The so-called semi-static method refers to an algorithm used by the system message to change the component carrier that needs to be monitored when the UE enters the DRX. The so-called dynamic mode means that the eNB and the UE perform message interaction before the UE enters the DRX state to determine the component carrier to be monitored when entering the DRX.

A dynamic negotiation mode is: before the UE enters the DRX state, the UE selects a component carrier. As the listening carrier in the DRX state, and notifying the eNB of the selected component carrier, when the eNB agrees to the monitoring carrier selected by the UE, the eNB sends an acknowledgment message to the UE, otherwise the eNB reselects a component carrier as the monitoring carrier for the UE. And inform the UE.

 Another way of dynamic negotiation is: Before the UE enters the DRX state, the eNB selects a component carrier as its listening carrier in the DRX state, and notifies the selected component carrier to the UE when the UE agrees to the eNB selected listening carrier. The UE sends an acknowledgement message to the eNB, otherwise the UE reselects a component carrier as the monitor carrier and notifies the eNB.

 Step 401: The eNB sends a DRX command to the UE to notify the UE to enter the DRX state.

 Step 402: After receiving the DRX command, the UE determines to listen to the monitoring carrier pre-negotiated with the eNB in the step 400 in the DRX state; when the wake-up time arrives or in the "on duration" phase, the UE monitors the PDCCH of the determined component carrier. channel.

 The determining a component carrier may be performed in a static or semi-static manner, and does not use the manner in which the carrier is negotiated in step 400. The so-called static mode is: When the UE enters the DRX state, it monitors the nth component carrier (n=l...Nl, N1 indicates that the UE is entering in the component carrier used before the UE enters the DRX state in the on duration phase. The number of component carriers used before the DRX state); or the nth component carrier of all component carriers of the listening cell (n=l...N2, N2 represents the number of component carriers of the cell), or the monitoring engine is composed of carriers. The nth component carrier (n = l ... N3, N3 represents the number of carriers composed of the engine). Here, the engine component carrier may be a cell-specific engine component carrier or a UE-specific engine component carrier. The so-called cell-specific engine component carrier refers to one or more control capabilities of all component carriers of the cell that are superior to other component carriers. The component carrier is a UE-specific component carrier, which means that the control capability of the component carrier used by the UE is better than one or more component carriers of other component carriers. Where n is a positive integer and is preset by the system.

 The component carrier that is determined may be the component carrier with the lowest frequency, or the component carrier with the lowest sequence number, which is not limited in the embodiment of the present invention.

 The semi-static mode is: notifying the DRX state by means of a system message.

The UE, which is the component carrier that should be monitored when it is in the on duration phase in the subsequent DRX process. After receiving the system message, the UE listens to the component carrier indicated in the system message in the on duration phase according to the indication of the system message. The component carrier that should be monitored during the on duration phase, specifically, the UE should listen to the group used before entering the DRX state in the subsequent on duration phase. The nth component carrier in the carrier (n=l...Nl, N1 represents the number of component carriers used by the UE before entering the DRX state) or the nth component carrier of all component carriers of the listening cell (n= l ... N2, N2 represents the number of constituent carriers of the cell, or the nth component carrier in the carrier consisting of the listening engine (n = l ... N3, N3 represents the number of carriers composed of the engine). Here, the engine component carrier may be a cell-specific engine component carrier or a UE-specific engine component carrier. The so-called cell-specific engine component carrier refers to one or more control capabilities of all component carriers of the cell that are superior to other component carriers. The component carrier is a UE-specific component carrier, which means that the control capability of the component carrier used by the UE is better than one or more component carriers of other component carriers. Where n is a positive integer and is set by the eNB.

 Step 403: When the downlink data of the UE arrives, the eNB determines whether the UE is in an uplink synchronization state, and if yes, sends the downlink data to the UE (not shown); otherwise, step 404 is performed;

 Step 404: The eNB allocates a PDCCH and a dedicated random access preamble to the UE to instruct the UE to perform a random access procedure to obtain uplink synchronization. In the PDCCH, the eNB allocates a dedicated random access Preamble to the UE.

 Step 405: After acquiring the dedicated random access Preamble from the PDCCH, the UE sends the dedicated random access Preamble to the eNB. After transmitting the random access Preamble, the UE receives the random access on the component carrier determined in advance by negotiation. Response message.

 Step 406: After receiving the dedicated random access Preamble, the eNB sends a random access response message on the component carrier determined in advance by negotiation; that is, in step 400 or step 402, the random carrier is sent on the component carrier determined by the UE. In response message.

 In the embodiment of the present invention, after receiving the DRX command sent by the eNB, the UE determines a component carrier in the component carrier that needs to be monitored at least when the UE enters the DRX state determined in advance with the eNB, and when the wakeup time arrives. Or listening to the PDCCH on the component carrier in the on duration phase; that is, after the UE sends the dedicated random access Preamble to the eNB, the component carrier that needs to be monitored can be clear, thereby reducing the power consumption of the UE; After receiving the dedicated random access Preamble, the random access response message is sent on the component carrier monitored by the UE, thereby saving downlink radio resources.

 A third preferred embodiment:

In this embodiment, after the UE enters the DRX state, the eNB allocates a PDCCH to the UE and When the dedicated random access preamble is used, the component carrier that the UE needs to monitor is simultaneously notified to the UE, and the random access response message received on the component carrier or the different dedicated random access allocated by the eNB on the PDCCH of different component carriers is indicated. Preamble, after receiving the PDCCH information of a certain carrier, the UE sends a dedicated random access Preamble to the eNB through the PDCCH, and the eNB can learn the component carrier currently being monitored by the UE through the dedicated Preamble, and the component carrier is used in the component carrier. A random access response message is sent. The specific implementation process is detailed in the third embodiment;

 Embodiment 3

 FIG. 5 is a flowchart of a method for random access according to Embodiment 3 of the present invention; the method includes:

 Step 501: The eNB sends a DRX command to the UE to notify the UE to enter the DRX state. Step 502: After receiving the DRX command, the UE enters a DRX state.

 Step 503: When the downlink data of the UE arrives, it is determined whether the UE is in an uplink synchronization state, and if yes, the downlink data is sent to the UE (not shown); otherwise, step 504 is performed;

 Step 504: The eNB determines a component carrier that the UE needs to monitor at least when the uplink is out of synchronization, and the component carrier is used to send a random access response message to the UE. Specifically, the eNB may be configured according to a component carrier and/or current that the UE can support. The ongoing business requirements determine the component carriers that the UE needs to listen to at least.

 Step 505: The eNB allocates a PDCCH to the UE, and carries a dedicated random access preamble and a component carrier that receives the random access response message in the PDCCH information.

 In other words, the PDCCH is allocated to the UE to perform the random access procedure to obtain the uplink synchronization. Meanwhile, in the transmitted PDCCH information, the eNB allocates a dedicated random access Preamble to the UE, and carries the indication UE in the PDCCH information. A component carrier that receives a random access response message.

 Step 506: The UE sends a dedicated random access Preamble to the eNB.

That is, the UE allocates a PDCCH to the UE in the receiving eNB, and carries the dedicated random access preamble and the component carrier that receives the random access response message in the PDCCH information, and then performs the packet according to the dedicated random access preamble. The non-contention random access procedure, that is, sending a dedicated random access Preamble to the eNB. At the same time, after transmitting the dedicated random access Preamble, the UE receives the random access response message on the component carrier indicated in the PDCCH. Step 507: After receiving the dedicated random access Preamble, the eNB sends a random access response message on the component carrier indicated in the PDCCH information of step 505.

 Of course, in the foregoing steps 504 to 507, the eNB may also allocate different dedicated random access Preambles on the PDCCHs of different component carriers, as specifically, in steps 504' to (not shown): Step 504': The eNBs are different. Assigning different dedicated random access Preamble to the UE on the PDCCH of the component carrier

 Step 505 ′: The eNB sends PDCCH information to the UE on multiple component carriers, and carries different dedicated random access Preambles on the PDCCH information.

 Step 506 ′: After receiving the PDCCH information on the multiple component carriers, the UE selects one Preamble from the PDCCH information carrying a dedicated random access Preamble to send to the eNodeB; that is, by letting the PDCCH information of different component carriers By carrying different dedicated random access Preambles, the eNB can learn the component carriers that the UE is listening through through the received dedicated Preamble.

 Step 507 ′: After receiving the dedicated random access Preamble, the UE sends a random access response message on the component carrier corresponding to the Preamble.

 In this embodiment, in addition to using the component carrier indicating that the UE receives the random access response message in the PDCCH information, the downlink message may be used to notify the UE, for example, MAC (Medium Access Control) may be used. The format of the PDU ( Protocol Data Unit) or the RRC message notifying the UE to receive the component carrier of the random access response message is not limited in the embodiment of the present invention.

 The embodiment of the present invention can be used to notify the UE of the component carrier that the UE needs to monitor at least, so that the UE can listen to the PDCCH information on the component carrier after sending the random access request, thereby solving the problem that when the downlink data arrives at the eNB. When the UE in the DRX state is in the random access procedure in the uplink out-of-synchronization process, when the UE accesses the eNB, the downlink component carrier monitored by the UE is unclear. That is to say, after the UE sends the dedicated random access Preamble, it can know that the eNB should send the component carrier of the random access response message. At the same time, after receiving the dedicated random access Preamble, the eNB also knows which component carriers need to send the random access response message, which improves the utilization of the downlink resources and reduces the power consumption of the UE.

An embodiment of the present invention further provides an evolved base station, and the structure thereof is schematic. As shown in FIG. 6, the evolved base station includes: a determining unit 61, a notification unit 62, a message receiving unit 63, and a message response unit 64, wherein the determining unit 61 is configured to determine one of the user equipment UEs that need to be monitored in the DRX state. Or a plurality of component carriers; the notification unit 62 is configured to notify the UE of one or more component carriers determined by the determining unit 61; the message receiving unit 63 is configured to receive, by the UE, a dedicated random access preamble; The message response unit is configured to send a random access response message on one of the one or more component carriers determined by the determining unit 61 after the message receiving unit 63 receives the dedicated random access preamble.

 The determining unit includes at least one of the following: a first determining unit, a second determining unit, and a third determining unit, where the first determining unit is configured to determine that the UE needs to enter a discontinuous receiving DRX state. The second determining unit is configured to: before the UE enters the discontinuous reception DRX state, the second determining unit negotiates with the UE that the UE should be monitored during the DRX state and the active state. a carrier, and determining, according to the result of the negotiation, one or more component carriers that the UE needs to monitor when the uplink is out of synchronization; the third determining unit, when the one or more dedicated random access preambles are allocated to the UE, Determining one or more component carriers that need to be monitored, and the component carrier is used to send a random access response message.

 The first notification unit is configured to: The one or more component carriers that need to be monitored are notified to the UE; the second notification unit is configured to notify the UE of one or more component carriers that the UE determined by the second determining unit needs to listen to when the uplink is out of synchronization; The third notification unit is configured to notify the UE by one or more component carriers that the UE needs to monitor when the dedicated random access preamble is allocated to the UE determined by the third determining unit.

 The message response unit is configured to: when the message receiving unit receives the random access preamble that is sent by the UE, send the random access on the at least one component carrier of the determined one or more component carriers. Response message.

 For the implementation process of the functions and functions of the units in the evolved base station, refer to the implementation process of the foregoing method, and details are not described herein again.

Correspondingly, the embodiment of the present invention further provides a terminal device, which is shown in FIG. 7. The terminal device includes: a receiving unit 71, a listening unit 72, a message sending unit 73, and a message receiving list. Yuan 74. The receiving unit 71 is configured to receive, by the eNB, a notification that one or more component carriers that the UE needs to monitor; the listening unit 72 is configured to monitor, by the receiving unit 71, one or the one that needs to be monitored in the notification. a plurality of component carriers; the message sending unit 73, configured to send a dedicated random access preamble to the eNB; the message receiving unit 74, configured to send, after the message sending unit 73, the dedicated random access preamble And receiving, by using one of the component carriers or one of the component carriers of the interception, a random access response message sent by the eNB.

 The receiving unit includes at least one of the following: a first receiving unit, a second receiving unit, and a third receiving unit, where the receiving unit is configured to receive, by using a DRX command or a dedicated message, the UE to enter the discontinuous manner. One or more component carriers that need to be monitored when receiving the DRX state; the second receiving unit, configured to receive one or more that the eNB needs to monitor when the UE goes out of synchronization before the UE enters the discontinuous reception DRX state. And the third receiving unit is configured to: when receiving, by the eNB, one or more dedicated random access preambles, receive, by the eNB, one or more component carriers that the UE needs to monitor, the component carrier Used to send random access response messages.

 The receiving unit may further include: a selecting unit, configured to: when the third receiving unit receives the eNB to allocate multiple dedicated random access preambles, select a dedicated one from the multiple dedicated random access preambles The component carrier corresponding to the random access preamble needs to listen to a component carrier, and will notify the listening unit as a component carrier to be monitored.

 For the implementation process of the functions and functions of the units in the terminal device, refer to the implementation process of the foregoing method, and details are not described herein.

Correspondingly, the embodiment of the present invention further provides a random access system, which is shown in FIG. 8 and includes: an eNB 81 and a UE 82, where the eNB 81 is configured to determine one or more UEs to be monitored in the DRX state. Transmitting the component carrier to the UE; and after receiving the dedicated random access preamble sent by the UE, sending random access on one of the determined component carriers or one of the component carriers The UE 82 is configured to receive, by the eNB, a notification that one or more component carriers that the UE needs to monitor, and listen to the one or more component carriers that need to be monitored; and send a dedicated random access preamble to the eNB. After the code, a component in the listener The random access response message sent by the eNB is received on one of the carrier or one of the component carriers. The eNB includes: a determining unit 811, a notifying unit 812, a message receiving unit 813, and a message response unit 814. The UE includes: a receiving unit 821, a listening unit 822, a message sending unit 823, and a message receiving unit 824. The implementation process of the functions and functions of the respective units is described in detail in the implementation process of the corresponding eNB and the UE, and details are not described herein again.

 Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product in essence or in the form of a software product, which may be stored in a storage medium such as a ROM/RAM or a disk. , an optical disk, etc., includes instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention or portions of the embodiments.

 The above description is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It is considered as the scope of protection of the present invention.

Claims

Rights request A random access method, comprising:  Determining one or more component carriers that the user equipment needs to monitor in the discontinuous reception state; notifying the one or more component carriers to the user equipment;  After receiving the dedicated random access preamble sent by the user equipment, the random access response message is sent on one of the determined component carriers or one of the component carriers.  The method according to claim 1, wherein the notifying the one or more component carriers to the user equipment comprises:  When the user equipment is notified to enter the discontinuous reception state, the user equipment is notified of one or more component carriers that need to be monitored.  The method according to claim 2, wherein the one or more component carriers that notify the user equipment that the device needs to be monitored include:  Notifying the user equipment one or more component carriers that need to be monitored when entering the discontinuous reception state when transmitting the discontinuous reception command to the user equipment; the discontinuous reception command is a medium access control layer message, a physical layer message, or a wireless Resource control layer message; or  The dedicated message notifies the user equipment of one or more component carriers that need to be monitored when entering the discontinuous reception state, and the dedicated message is: a discontinuous reception of the monitoring carrier command message.  The method according to claim 1, wherein the notifying the one or more component carriers to the user equipment comprises: when assigning one or more dedicated random access preambles to the user equipment, Notifies the user of one or more component carriers that the device needs to listen to.  The method according to any one of claims 1 to 4, wherein the determining one or more component carriers that the user equipment needs to monitor in the discontinuous reception state comprises:  Before the user equipment enters the discontinuous reception state, the evolved base station negotiates with the user equipment the component carriers that the user equipment should monitor in the discontinuous reception state and the activation state, and determines, according to the result of the negotiation, that the user equipment needs to be out of synchronization in the uplink. One or more component carriers that are monitored; And one or more component carriers that need to be monitored when the determined user equipment is out of synchronization in uplink Know the user equipment.  6. A random access method, comprising:  Receiving, by the evolved base station, a notification that one or more component carriers that the user equipment needs to listen to; and monitoring one or more component carriers that need to be monitored in the notification;  After the dedicated random access preamble is sent to the evolved base station, the random access response message sent by the evolved base station is received on one of the component carriers or one of the component carriers.  The method according to claim 6, wherein the receiving, by the evolved base station, the notification that the user equipment that the user equipment needs to monitor comprises one or more component carriers, including:  And receiving, by the evolved base station, one or more component carriers that need to be monitored when the user equipment sent by the discontinuous reception command or the dedicated message enters the discontinuous reception state; the discontinuous reception control command is: a medium access control layer message, a physical layer message Or a RRC message; the dedicated message is: a discontinuous reception of a carrier carrier command message; or  Receiving, by the evolved base station, a dedicated random access preamble, receiving, by the evolved base station, a component carrier that the user equipment needs to monitor; or  And when receiving the multiple dedicated random access preambles allocated by the evolved base station, the selected one of the multiple dedicated random access preambles is sent to the component carrier corresponding to the dedicated random access preamble of the evolved base station. As a component carrier that needs to be monitored; or  Before the user equipment enters the discontinuous reception state, the user equipment selects one or more component carriers that are monitored in the discontinuous reception state to notify the evolved base station, and if the evolved base station agrees, the user equipment receives the evolved base station and sends the consent to the user equipment to listen to one. Or a plurality of notifications constituting the carrier; otherwise, the user equipment receives the notification that the evolved base station reselects one or more component carriers as the monitoring carrier for the user equipment; or  Before the user equipment enters the discontinuous reception state, receiving the one or more component carriers of the carrier when the evolved base station selects the discontinuous reception state for the user equipment, and if the user equipment agrees, sends an acknowledgement message to the evolved base station; otherwise, the user The device reselects one or more component carriers that are listening in the discontinuous reception state and notifies the evolved base station. The method according to claim 6 or 7, wherein the monitoring notification needs One or more component carriers monitored are:  Upon receiving the discontinuous reception command sent by the evolved base station, one component carrier is determined from one component carrier to be monitored or from multiple component carriers, and the component carrier is monitored.  The method according to claim 8, wherein the determining a component carrier from the component carrier to be monitored or from the component carriers comprises:  After the user equipment enters the discontinuous reception state, the user equipment will listen to the nth component carrier of the component carriers used before entering the discontinuous reception state, or the nth component of all component carriers of the cell during the activation state. The nth component carrier in the carrier or the monitoring engine component is determined as a component carrier to be monitored, where n is a positive integer and is preset by the system; or when the user equipment enters the discontinuous reception state, The system message receives a component carrier that is sent by the evolved base station and needs to be monitored during the activation state of the user equipment, where the component carrier includes: an nth component carrier or a cell of the component carriers used before entering the discontinuous reception state The nth component carrier or the interception engine of all component carriers constitutes the nth component carrier in the carrier, where the value of n is a positive integer and is set by the evolved base station.  10. An evolved base station, comprising:  a determining unit, configured to determine one or more component carriers that the user equipment needs to monitor in a discontinuous reception state;  a notification unit, configured to notify the user equipment of one or more component carriers determined by the determining unit, a message receiving unit, configured to receive, by the user equipment, a dedicated random access preamble, and a message response unit, configured to receive at the message receiving unit After the dedicated random access preamble, a random access response message is sent on one of the one or more component carriers determined by the determining unit.  The evolved base station according to claim 10, wherein the determining unit comprises at least one of the following:  a first determining unit, configured to determine one or more component carriers that the user equipment needs to monitor when entering the discontinuous reception state; a second determining unit, configured to negotiate with the user equipment before the user equipment enters the discontinuous reception state The component carrier that should be monitored by the user equipment in the discontinuous reception state and the activation state, and determines one or more component carriers that the user equipment needs to monitor when the uplink is out of synchronization according to the result of the negotiation; the third determining unit is configured to When the user equipment is allocated one or more dedicated random access preambles, one or more component carriers that need to be monitored are determined, and the component carriers are used to send a random access response message.  The evolved base station according to claim 11, wherein the notification unit comprises at least one of the following:  a first notification unit, configured to notify the user equipment of one or more component carriers that the user equipment that is determined by the first determining unit needs to monitor;  a second notification unit, configured to notify, by the user equipment determined by the second determining unit, one or more component carriers that need to be monitored when the uplink is out of synchronization, to the user equipment;  And a third notification unit, configured to notify the user equipment by the one or more component carriers that the user equipment needs to monitor when the dedicated random access preamble is allocated to the user equipment determined by the third determining unit.  13. A terminal device, comprising:  a receiving unit, configured to receive, by the evolved base station, a notification that one or more component carriers that the user equipment needs to monitor;  a monitoring unit, configured to monitor, by the receiving unit, one or more component carriers that need to be monitored in the notification;  a message sending unit, configured to send a dedicated random access preamble to the evolved base station;  The message receiving unit is configured to: after transmitting the dedicated random access preamble, receive a random access response message sent by the evolved base station on one of the component carriers or one of the component carriers that are monitored.  The terminal device according to claim 13, wherein the receiving unit comprises at least one of the following:  a first receiving unit, configured to receive, by the evolved base station, one or more component carriers that need to be monitored when the user equipment enters the discontinuous reception state by using a discontinuous reception command or a dedicated message; a second receiving unit, configured to receive the evolved base station before the user equipment enters the discontinuous reception state One or more component carriers that need to be monitored when the user equipment is out of synchronization;  And a third receiving unit, configured to receive, by the evolved base station, one or more component carriers that the user equipment needs to monitor when the one or more dedicated random access preambles are allocated by the evolved base station, where the component carrier is used to send Random access response message.  The terminal device according to claim 14, wherein the receiving unit further comprises:  a selecting unit, configured to: when the third receiving unit receives the allocated base station to allocate multiple dedicated random access preambles, select a dedicated random access preamble corresponding to the multiple dedicated random access preambles The component carrier is required to listen to a component carrier, and will notify the listening unit as a component carrier that needs to be monitored.