WO2012167647A1

WO2012167647A1 - Method, device and system for processing the failure of random access into the secondary cell

Info

Publication number: WO2012167647A1
Application number: PCT/CN2012/072893
Authority: WO
Inventors: 陈中明; 黄亚达; 万璐
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-06-09
Filing date: 2012-03-23
Publication date: 2012-12-13
Also published as: CN102821479A

Abstract

Disclosed in the present invention is a method for processing the failure of random access into the Secondary Cell (Scell), the method comprises: when UE fails to random access, the control instruction corresponding to the Scell is stopped to receive. Disclosed in the present invention is another method for processing the failure of random access into the Scell, the method comprises: when UE fails to random access, eNB instructs UE to delete the configuration of the Scell or deactive the Scell; the UE, according to the instruction, delete the configuration of the Scell or deactive the Scell. Accordingly, Disclosed in the present invention is a device and system for processing the failure of random access into the Scell, the device and system make the behavior of the UE after the UE fails to random access into the Scell clear, thus ensure the efficient use of the resource, and reduce unnecessary interference effectively.

Description

Method, device and system for processing random access failure of auxiliary service cell

The present invention relates to the field of wireless communications, and in particular, to a method, a device, and a system for processing a random access failure of a secondary serving cell (Scdl, Secondary Cell). Background technique

The protocol stack of the interface between the user equipment (UE, User Equipment) and the base station (eNB) in the Long Term Evolution (LTE) system is shown in Figure 1. The following five protocol layers are divided from the bottom to the top: Physical layer ( PHY, Physical layer), Media Access Control (MAC), Radio Link Control (RLC), Packet Data Convergence Protocol (PDCP), Radio Resource Control Layer ( RRC, Radio Resource Control). The PHY mainly transmits information to the MAC or higher layer through the transport channel, and the MAC mainly provides data transmission and is responsible for radio resource allocation through the logical channel, and completes hybrid automatic repeat request (HARQ, Hybrid ARQ), scheduling (SCH, Scheduling), and priority. RLC mainly provides segmentation and retransmission services for control data to users, and PDCP is mainly used to transmit data to RRC or user upper layer users. RRC mainly completes broadcasting ( Broadcast ), Paging, Radio Resource Control Connection Management, Radio Bearer Control, Mobility, and Terminal Measurement Reporting and Control.

In the LTE system, before the UE in the connected state sends data to the base station, it needs to obtain uplink synchronization and downlink synchronization with the base station. If the UE performs measurement on a cell, that is, downlink synchronization with the cell has been obtained, otherwise a process similar to cell search needs to be performed. The uplink synchronization is obtained by performing a random access procedure, and the time advancement (TA, Time Advance) is obtained. The TA is used by the UE to determine the time of sending data. After the UE acquires the uplink synchronization, the uplink synchronization is started. The timer (TAT, Time Alignment Timer), if the UE can receive the TA sent by the base station to the UE before the TAT expires, the UE is considered to maintain uplink synchronization with the base station, otherwise the TAT times out, and the UE considers that the uplink synchronization is lost and is lost. If the data needs to be sent to the base station after the uplink synchronization, the uplink synchronization needs to be acquired again.

In the LTE system, the cell has only one carrier, so there is only one TA, and the random access procedure is implemented at the MAC layer. Currently, the UE performs a random access procedure in the following situations: initial access from idle operation (IDLE) state, RRC connection reestablishment, handover, downlink (DL, Downlink) data arrival, and uplink (UL, Uplink) data arrival. And positioning business. In the connected state, if the random access fails, the uplink synchronization fails. At this time, the MAC layer notifies the RRC layer and performs an RRC re-establishment process to resume data communication with the base station. The general conflict-based random access procedure is shown in Figure 2. The collision-free random access procedure has only two message interactions (that is, random access preamble and random access corresponding). As long as the process is not completed, it is random access. failure.

In order to provide mobile users with higher data rates, the Long Term Evolution (LTE-A) system proposes Carrier Aggregation (CA), which aims to provide greater bandwidth for UEs with corresponding capabilities. , increase the peak rate of the UE. In LTE, the maximum downlink transmission bandwidth supported by the system is 20 MHz. Carrier aggregation is to aggregate two or more component carriers (CCs) to support a transmission bandwidth greater than 20 MHz and no more than 100 MHz. The LTE-A UE with carrier aggregation capability can transmit and receive data on multiple component carriers at the same time. The UEs involved below refer to such UEs unless otherwise specified. In the LTE-A system, after the UE enters the connected state, it can simultaneously communicate with the source base station through multiple component carriers (such as CC1 and CC2), and the base station specifies a primary component carrier for the UE through explicit configuration or according to protocol agreement ( The serving cell on the PCC is called the primary cell (Pcell, Primary Cell), and the serving cell on the SCC is called Scell, where Scell is the Scell, and the secondary component carrier (SCC). It is configured by the base station after the UE enters the connected state. In general, a serving cell has symmetric uplink and downlink. It is clearly indicated in the cell broadcast system message block 2 (SIB2, System Information Block 2) that in order to avoid interference of the control channel, the concept of cross-carrier scheduling is introduced, that is, When the interference of the physical downlink control channel (PDCCH) of the Scell is severe, the PDCCH of the Scell is not enabled, but the physical uplink shared channel of the Scell is scheduled by another serving cell (PUSCH, Physical Uplink Share Channel), another serving cell here can be configured through RRC signaling. In the LTE-A system, each serving cell has a configured identifier, called a serving cell identifier, and the serving cell identifier of the Pcdl is fixed to zero. For the secondary serving cell, there is also a separate secondary serving cell identifier, and the secondary serving cell identifier of the secondary serving cell is the same as the corresponding monthly good service cell identifier.

Although the UE works at the highest rate, it is possible to use up to 5 carriers at most, but in the burst gap, the actual traffic of the UE is rarely or close to zero. If the UE continues to wait for data reception on multiple carriers, Will result in higher power overhead. In order to extend the working time of the UE, it is necessary to turn off the wireless receiving device that is not necessarily turned on to reduce unnecessary battery consumption, and the concept of carrier activation deactivation is introduced in the LTE-A system. The UE performs data reception only on the activated carrier, such as PDCCH monitoring, SRS (Sounding Reference Symbols), and Channel Quality Indicator (CQI, Channel Quality Indicator)/Precoding Matrix indication (PMI, Precoding Matrix). Index ) / rank indicator (RI, Rank Indicator); For carriers that are not used temporarily, the base station deactivates these carriers by displaying command notification or implicit rules. On the deactivated carrier, the UE does not monitor the PDCCH and does not receive the physical downlink. The data on the shared channel (PDSCH, Physical Downlink Shared Channel) does not send SRS, and does not report CQI/PMI/RI, thus achieving power saving.

In the initial stage of carrier aggregation (ie, RdlO), the number of Scells is relatively small (such as one), and the scene is also limited. For example, the remote radio head (RRH) and the power amplifier (repeter) are not supported. There is only one TA, and the UE only needs to be initiated on the Pcdl. Line synchronization can be done, it will not be initiated on Scell. In the subsequent stage, as the amount of data increases, the number of Scells increases (for example, four), and the scenario is also relaxed. If the uplink RRH and repeater are supported, the TA cannot solve the problem, so multiple TAs are introduced. In this case, the Scell is also required to initiate uplink synchronization. However, if the subsequent behavior of the UE fails to be synchronized, the UE may continue to perform random access, causing waste of resources and causing unnecessary interference to other UEs. Summary of the invention

In view of this, the main purpose of the present invention is to provide a processing method, apparatus, and system for Scell random access failure, so as to solve the problem that the subsequent behavior of the UE that fails to synchronize is unclear.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

The present invention provides a method for processing a random access failure of an Scell, the method comprising: stopping, after receiving a random access failure on the Scell, stopping receiving control signaling corresponding to the Scell.

In the above solution, the stopping receiving the control signaling corresponding to the Scell includes: stopping receiving control signaling for controlling the behavior of the uplink carrier of the Scell;

Or, stopping receiving control signaling for controlling the behavior of the downlink carrier of the Scell; or stopping receiving control signaling for controlling the behavior of the uplink carrier of the Scell and control signaling for controlling the behavior of the downlink carrier of the Scell.

In the above solution, the stopping receiving the control signaling corresponding to the Scell is: when the Scell is scheduled to be cross-carrier, the UE stops receiving a control message for controlling the Scell on a carrier that schedules the Scell. make.

In the foregoing solution, the stopping receiving the control signaling corresponding to the Scell is: when the Scell is not scheduled by the cross-carrier, stopping receiving the control signaling indicated by the SIB2 in the configuration of the Scell on the UE.

The present invention also provides a method for processing a random access failure of the Scell, the method includes: when the UE fails to access the Scell randomly, the eNB instructs the UE to delete the configuration of the Scell or deactivate the Scell; The UE deletes the configuration of the Scdl or deactivates the Scdl according to the indication of the eNB.

In the above solution, when the UE fails to access the Scdl, the eNB instructs the UE to delete the configuration of the Scell or deactivate the Scell, as follows:

When the UE fails to access the Scdl, the UE notifies the eNB that the random access to the Scdl fails; after receiving the notification, the eNB instructs the UE to delete the configuration of the Scdl or deactivate the Scell;

Or, when the eNB detects that the UE randomly fails to access the Scdl, instructs the UE to delete the configuration of the Scell or deactivate the Scell.

In the above solution, the UE notifying the eNB that the random access to the Scell fails is:

The UE sends an access failure notification message including the serving cell identity of the Scdl, or the secondary serving cell identity, or a bit bitmap to the eNB.

The present invention also provides a method for processing a random access failure of an Scell, where the method includes: when the UE fails to access the Scdl randomly, the UE performs an RRC re-establishment process.

The present invention further provides a processing device for failing random access of a Scdl, the device comprising: a receiving unit, configured to stop receiving, by the UE, control signaling corresponding to the Scdl after a random access failure on the Scdl.

In the above solution, the receiving unit is configured to stop receiving control signaling for controlling the behavior of the uplink carrier of the Scell, or stop receiving control signaling for controlling the behavior of the downlink carrier of the Scell, or stop receiving Control signaling for controlling the behavior of the Scell uplink carrier and control signaling for controlling the behavior of the downlink carrier of the Scell.

In the above solution, the receiving unit is further configured to stop receiving control signaling for controlling the Scdl on a carrier that schedules the Scdl when the Scdl is scheduled to be cross-carrier.

In the above solution, the receiving unit is further configured to stop receiving control signaling indicated by the SIB2 in the configuration of the Scdl on the UE when the Scdl is not scheduled by cross-carrier. The present invention also provides a processing apparatus for Scell random access failure, and the apparatus includes: a reconstruction unit, configured to perform an RRC re-establishment process when the UE randomly fails to access the Scell.

The present invention further provides a processing system for Scell random access failure, the system comprising: an indication unit and an action unit;

The indicating unit is configured to be used by the eNB to instruct the UE to delete the configuration of the Scell or deactivate the Scell when the UE fails to access the Scell randomly;

The action unit is configured to be used by the UE to delete the configuration of the Scell on the UE or deactivate the Scell according to the indication of the indication unit.

In the foregoing solution, the system further includes: a notification unit, configured to be used by the UE, configured to notify the indication unit that the UE randomly fails to access the Scell when the UE randomly fails to access the Scell; the indicating unit is further used After receiving the notification of the notification unit, instructing the UE to delete the configuration of the Scell or deactivate the Scdl.

In the above solution, the system further includes: a detecting unit, configured to be used by the eNB, configured to notify the indication unit that the UE randomly fails to access the Scell when the UE fails to access the Scell;

The indication unit is further configured to: after receiving the notification by the detecting unit, instruct the UE to delete the configuration of the Scell or deactivate the Scdl.

The method, device, and system for processing a random access failure of a secondary serving cell (Scell) provided by the present invention, when the UE randomly fails to access the Scell, stops receiving the control signaling corresponding to the Scell, or deletes the Scell according to the indication of the eNB. The Scell is configured or deactivated to clarify the behavior of the UE after the Scell random access fails, thereby ensuring efficient use of resources and effectively reducing unnecessary interference. DRAWINGS

1 is a schematic diagram of a protocol stack of an interface between a UE and a base station;

2 is a schematic diagram of a general conflict-based random access procedure;

3 is a flowchart of implementing an Scell random access failure processing method according to the present invention; 4 is a flowchart of implementing a random access procedure and performing random access failure processing according to an embodiment of the present invention;

FIG. 5 is a flowchart of an implementation of a random access procedure and a random access failure process according to Embodiment 2 of the present invention;

6 is a flowchart of an implementation of a random access procedure and a random access failure process according to Embodiment 3 of the present invention;

7 is a flowchart of an implementation of a random access procedure and a random access failure process according to Embodiment 4 of the present invention;

FIG. 8 is a flowchart of an implementation of a random access procedure and a random access failure processing according to Embodiment 5 of the present invention;

FIG. 9 is a flowchart of an implementation of a random access procedure and a random access failure processing according to Embodiment 6 of the present invention;

FIG. 10 is a flowchart of an implementation of a random access procedure and a random access failure process according to Embodiment 6 of the present invention. detailed description

The basic idea of the present invention is: when the UE determines that the random access fails on the Scdl, it stops receiving the control signaling corresponding to the Scdl; or, the UE may notify the eNB when determining the random access failure on the Scdl, and then The eNB instructs the UE to delete the configuration of the Scell or deactivate the Scell. In this way, the subsequent behavior of the UE after the random access failure of the Scdl is clarified, and the efficient use of resources and unnecessary interference can be ensured.

The method for processing the Scell random access failure of the present invention may include: stopping receiving the control signaling corresponding to the Scdl when the UE fails to access the Scdl.

Here, the stopping receiving the control signaling corresponding to the Scdl may be: stopping receiving control signaling for controlling the behavior of the Scell uplink (UL, Uplink) carrier; or stopping receiving for controlling the downlink of the Scdl (DL, Downlink) control signaling of carrier behavior; or, stop And receiving control signaling for controlling the behavior of the Scdl uplink carrier and control signaling for controlling the behavior of the downlink carrier of the Scdl.

The control signaling refers to downlink control information (DCI, Downlink Control Information) sent on the PDCCH.

In an actual application, the UE may listen to the PDCCH corresponding to the Scdl according to the indication or the default rule of the base station, and receive control signaling of the UL carrier behavior corresponding to the Scdl and/or control signaling of the DL carrier behavior. The PDCCH is used to carry the DCI, and the DCI includes: uplink scheduling information, downlink scheduling information, and uplink power control information. The DCI format (DCI format) is divided into the following types: DCI format 0, DCI format 1, DCI format 1A, DCI format 1B, DCI format 1 C, DCI format 1 D, DCI format 2, DCI format 2A, DCI format 3 And DCI format 3A, etc., where DCI format 0 is used to indicate scheduling of Physical Uplink Shared Channel (PUSCH); DCI format 1, DCI format 1A, DCI format 1B, DCI format 1C, DCI format ID is used for one Different modes of codeword scheduling for Physical Downlink Shared Channel (PDSCH); DCI format 2, DCI format 2A, DCI format 2B for different modes of space division multiplexing; DCI format 3, DCI format 3 A for Different modes of the power control command of the physical uplink control channel (PUCCH, Physical Uplink Control Channel) and PUSCH. The UE performs blind detection on all possible PDCCH code rates according to the DCI format of the transmission mode in the search space of the common (common) and the search space of the UE-specific (UE-Specific), that is, the UE may search only one of them or Multiple DCI formats.

The control signaling for stopping receiving the UL carrier behavior corresponding to the Scdl may be: the UE stops receiving DCI format 0, DCI format 3, and DCI format 3A in the control signaling corresponding to the Scdl. The control signaling for stopping the DL carrier behavior corresponding to the Scdl may be: the UE stops receiving the control signaling corresponding to the Scdl, DCI format 1, DCI format 1A, DCI format IB, DCI format 1C, DCI format ID, DCI Fo leg t 2 and DCI format 2A. Specifically, if the Scdl is not scheduled by cross-carrier, the UE stops receiving the control signaling indicated in the configuration of the Scell. Specifically, the control signaling indicated by the SIB2 in the configuration of the Scdl on the UE is stopped.

If the Scdl is scheduled across carriers, the UE stops receiving control signaling for scheduling the Scdl on the carrier that schedules the Scdl. Specifically, the UE stops receiving control signaling that controls the Scdl on the serving cell carrier that schedules the Scell.

For example, if the Scell is scheduled by the Pcdl across carriers, the UE stops controlling the control signaling of the Scdl on the carrier of the Pcell.

Specifically, after the UE sends a dedicated preamble for random access to the Scdl, the UE does not receive the random access response message returned by the eNB within a specified time, or the received random access corresponding message includes a random connection. If the incoming preamble identifier is not the access preamble identifier sent by the UE, or the UE does not receive the msg4 that resolves the conflict, it is considered that the random access Scdl fails.

Another method for processing a random access failure of the Scell of the present invention, as shown in FIG. 3, may mainly include the following steps:

Step 301: When the UE fails to access the Scdl, the eNB instructs the UE to delete the configuration of the Scell or deactivate the Scdl.

Step 302: The UE deletes the configuration of the Scdl or deactivates the Scdl according to the indication of the eNB.

Specifically, when the UE fails to access the Scdl, the UE notifies the eNB that the random access to the Scdl fails; after receiving the notification, the eNB instructs the UE to delete the configuration of the Scdl or deactivate the Scdl; or When the eNB detects that the UE randomly fails to access the Scdl, the eNB instructs the UE to delete the configuration of the Scdl or deactivate the Scdl. Or the access service cell identifier, or the access failure notification message of the bit bitmap. The random access failure notification message includes information about the Scell, for example, a serving cell identifier of the Scdl, or a secondary Serving cell identity, or bit map. The bit bitmap is a bit bitmap of the serving cell identity and the secondary serving cell identity according to being arranged from large to small or from small to large.

Here, the eNB may indicate that the UE deletes the configuration of the Scdl by using RRC reconfiguration, and may send the MAC control unit (CE, Control Element) to the UE, and instruct the UE to deactivate the Scdl.

Another method for processing a random access failure of the Scell of the present invention includes: performing a radio resource control (RRC) reconstruction process when the UE fails to access the Scdl.

Correspondingly, the present invention further provides a processing device for the Scell random access failure, the device comprising: a receiving unit, configured to stop receiving the control signaling corresponding to the Scell after the UE fails the random access on the Scdl.

The receiving unit is specifically configured to stop receiving control signaling for controlling the behavior of the uplink carrier of the Scdl, or stop receiving control signaling for controlling the behavior of the downlink carrier of the Scdl, or stop receiving the control device. Control signaling of the Scdl uplink carrier behavior and control signaling for controlling the behavior of the Scdl downlink carrier. Here, the receiving unit is further configured to stop receiving control signaling for controlling the Scdl on a carrier that schedules the Scdl when the Scell is cross-carrier scheduled. Here, the receiving unit is further configured to stop receiving control signaling indicated by SIB2 in the configuration of the Scdl on the UE when the Scdl is not scheduled by cross-carrier.

The processing device for the Scell random access failure of the present invention includes: a reconstruction unit, configured to perform an RRC re-establishment process when the UE randomly fails to access the Scell. Here, the reconstruction unit may be disposed on the UE.

The present invention further provides a processing system for the random access failure of the Scdl, the system mainly includes: an indication unit and an action unit; wherein the indication unit is configured by the eNB, and is configured to: when the UE randomly fails to access the Scell, indicating the Deleting the configuration of the Scell or deactivating the Scell; the action unit is configured in the UE, and is configured to delete the UE according to the indication of the indication unit The Scell is configured or deactivated.

The system may further include: a notification unit, configured to be used by the UE, to notify the instructing unit that the UE randomly fails to access the Scell when the UE fails to access the Scell randomly; and the indicating unit is further configured to: After receiving the notification of the notification unit, the UE is instructed to delete the configuration of the Scell or deactivate the Scell.

The system may further include: a detecting unit, configured to be used by the eNB, to detect that the UE randomly fails to access the Scell when the UE fails to access the Scell randomly; the indicating unit further After receiving the notification of the detecting unit, the UE may be instructed to delete the configuration of the Scell or deactivate the Scell.

Specifically, the indicating unit may further send the MAC CE to the UE, instruct the UE to deactivate the Scell, and/or instruct the UE to delete the configuration of the Scell by using RRC reconfiguration.

Embodiment 1

In this embodiment, the eNB is a base station having carrier aggregation capability, and is governed by three cells, namely, cell 1 (Cdl_1), cell 2 (Cell_2), and cell 3 (Cell_3), wherein part or all of the three cells The ability of carrier aggregation can be provided to the UE to extend the bandwidth of the transmission. The UE accesses the network through the eNB (or the network switches the UE to the eNB), and the eNB configures three simultaneously working cells Cdl_l, Cdl_2, and Cdl_3 according to the capabilities of the UE, and the Cdl_l provides the UE with a non-access layer (NAS, Non - Access-Stratum) Mobility information such as Public Land Mobile Network (PLMN), Global Cell Identity (CGI), Cellular Identifier (TCI), Tracking Area Code (TAC), etc., is the Pcdl of the UE. Cdl_2 and Cell_3 are the Sccells of the UE, and the UE only receives the system message and the paging message of Cell_1. Specifically, the Cell_1, the Cell_2, and the Cell_3 may be an RRH cell, or a repeater, or an ordinary cell. The serving cell identifiers of Cdl_1, Cdl_2, and Cdl_3 are 0, 1, and 2, respectively. The secondary serving cell identifiers of Cell_2 and Cell_3 are respectively 1, 2. In this embodiment, Cell_l, Cdl_2, and Cdl_3 are all self-scheduled, and the specific implementation process of the UE performing the random access procedure on the Cell_2 and performing the random access failure processing is as shown in FIG. 4, and may include the following steps:

Step 401: The eNB sends a MAC CE to the UE, and includes a command to activate Cell_2. Step 402: The UE receives the MAC CE, activates Cdl_2, and starts to monitor the PDCCH of Cdl_2, and receives control signaling of Cdl_2. Here, due to the uplink of Cell_2 Not yet synchronized, SRS cannot be sent at this time, and CQI/PMI/RI cannot be reported.

Step 403: The eNB sends a dedicated preamble to the UE, and triggers the UE to perform uplink synchronization on Cdl_2.

Step 404: The UE sends a dedicated preamble to the eNB on the Cell_2, and performs a random access procedure on the Cell_2.

Step 405: The UE does not receive the random access response message fed back by the eNB within a specified time, and considers that the random access fails, the UE stops receiving the control signaling on Cdl_2, or the UE stops receiving and controlling the Cdl_2 UL carrier behavior. Control signaling continues to receive control signaling that controls the behavior of the Cell_2 DL carrier.

Specifically, the UE stops receiving the control signaling indicated by SIB2 in the configuration of Cdl_2 on the UE.

Embodiment 2

The scenario in this embodiment is the same as that in the first embodiment. The difference is that the Cell_1 scheduling itself, Cdl_2 and Cdl_3 are all scheduled by Cell_1, and the Cdl_1 will notify the UE that the Cell_2 and the Cell_3 are scheduled by the Cell_1 through the RRC reconfiguration command, and the UE executes the Cell_2. The specific implementation process of the random access process and the random access failure processing is as shown in FIG. 5, and may include the following steps:

Step 501: It is exactly the same as step 401;

Step 502: The UE receives the MAC CE, activates Cdl_2, and starts to listen to the PDCCH related to Cell_2 on the Cdl_1, and receives the control signaling related to the Cell_2. Step 503: It is exactly the same as step 403;

Step 504: The same as step 404;

Step 505: The UE does not receive the random access response message fed back by the eNB within a specified time, and recognizes that the random access fails, and the UE stops receiving the control signaling related to Cdl_2 on the Cdl_1.

Embodiment 3

The scenario in this embodiment is the same as that in the second embodiment. In this embodiment, the specific implementation process of the UE performing the random access procedure on the Cdl_2 and the Cell_3 and performing the random access failure processing is as shown in FIG. 6 , and may include the following steps:

Step 601: The eNB sends a MAC CE to the UE, and includes a command for activating Cdl_2 and Cdl_3.

Step 602: The UE receives the MAC CE, activates Cell_2 and Cell_3, and starts to listen to the PDCCH related to Cell_2 and Cell_3 on Cell_1, and receives the control signaling of Cell_2 and the control signaling of Cell_3. Here, since the uplink is not synchronized, The UE cannot send SRS, nor can it report CQI/PMI/RI.

Step 603: The eNB sends a dedicated preamble to the UE, and triggers the UE to perform uplink synchronization on Cell_2 and Cell_3.

Step 604: The UE simultaneously sends a dedicated preamble to the eNB on Cdl_2 and Cell_3, and performs a random access procedure on Cell_2 and Cdl_3.

Step 605: The UE does not receive the random access response message fed back by the eNB within a specified time, and considers that the two random accesses fail, and the UE stops receiving the control signaling related to Cdl_2 on Cdl_1 and the control signaling related to Cdl_3.

Embodiment 4

The scenario in this embodiment is the same as that in the first embodiment. In this embodiment, the UE performs. The specific implementation process of the random access procedure on the 611_2 and performing the random access failure processing is as shown in FIG. 7, and may include the following steps: Step 701: It is exactly the same as step 401;

Step 702: The UE receives the MAC CE, and activates Cdl_2.

Step 703: The eNB sends a dedicated preamble to the UE, and triggers the UE to perform uplink synchronization on the Cell_2.

Step 704: The UE sends a dedicated preamble to the eNB on Cdl_2, and performs a random access procedure on Cdl_2.

Step 705: The UE does not receive the random access response message fed back by the eNB within a specified time, and determines that the random access fails.

Step 706: The UE notifies the eNB of the random access failure on the Cdl_2 by using the Cdl_1; where the notification includes the serving cell identifier of the Cell_2, or the secondary serving cell identifier of the Cdl_2, or the small to large bit according to the secondary serving cell identifier. Figure.

For example, when random access fails on Cdl_2, the bitmap from small to large can be 01000000, and the bitmap from large to small is 00000010. The range of the secondary service cell is 1-7, and it is not limited to start from the rightmost bit.

Step 707: After receiving the notification, the eNB sends an RRC reconfiguration indication, and the UE deletes the configuration of Cell_2 or sends a MAC CE to instruct the UE to deactivate Cdl_2.

Step 708: The UE deletes all configurations of Cdl_2 or deactivates Cdl_2 according to the indication of the eNB.

Here, all configurations of Cell_2 include public configuration and dedicated configuration of radio resources related to Cell_2.

Embodiment 5

The scenario in this embodiment is the same as that in the third embodiment. In this embodiment, the specific implementation process of the UE performing the random access procedure on the Cdl_2 and performing the random access failure processing is as shown in FIG. 8, and may include the following steps:

Step 801: The eNB sends a MAC CE to the UE, including activating Cell_2 and Cell_3. Command

Step 802: The UE receives the MAC CE, and activates Cdl_2 and Cell_3.

Step 803: The eNB sends a dedicated preamble to the UE, and triggers the UE to perform uplink synchronization on Cell_2 and Cell_3.

Step 804: The UE sends a dedicated preamble to the eNB on Cdl_2 and Cell_3 at the same time.

A random access procedure is performed on Cell_2 and Cdl_3;

Step 805: The UE does not receive the random access response message fed back by the eNB within a specified time, and determines that the two random accesses fail.

Step 806: The UE notifies the eNB that the random access fails on Cdl_2 and Cdl_3 through Cdl_1;

The notification includes a serving cell identifier of Cell_2 and Cell_3, or a secondary serving cell identifier of Cell_2 and Cell_3, or a bit bitmap of Cell_2 and Cell_3 according to the secondary serving cell identifier from small to large.

For example, when random access fails on both Cdl_2 and Cdl_3, the bitmap from small to large can be 01100000, and the bitmap from large to small is 0000011.

Step 807: After receiving the notification, the eNB sends an RRC reconfiguration indication that the UE deletes the configuration of Cell_2 and Cdl_3 or sends a MAC CE to instruct the UE to deactivate Cell_2 and Cell_3;

Step 808: The UE deletes all configurations of Cdl_2 and all configurations of Cell_3 or deactivates Cdl_2 and Cell_3 according to the indication of the eNB.

Here, all configurations of Cell_2 include public configuration and dedicated configuration of radio resources related to Cell_2, and all configurations of Cdl_3 include public configuration and dedicated configuration of radio resources related to Cdl_3.

Embodiment 6

The scenario in this embodiment is the same as that in the fourth embodiment. The specific implementation process of the UE performing the random access process on the Cdl_2 and performing the random access failure process is as shown in FIG. 9 , and may include the following steps. Step:

Step 901 - Step 904: identical to steps 701-704;

Step 905: The UE does not receive the random access response message fed back by the eNB within a specified time, and determines that the random access fails and continues to maintain the current state.

Step 906: The eNB detects that the UE fails to access the random access on Cell_2, sends an RRC reconfiguration indication, and the UE deletes the configuration of Cdl_2 or sends a MAC CE to instruct the UE to deactivate Cdl_2.

Specifically, after the eNB sends a random access response message to the UE, it detects whether the uplink message further received by the UE is received within a specified time. If not, the UE considers that the UE fails to access the random access on Cell_2.

Step 907: It is identical to step 708.

Example 7:

The scenario in this embodiment is the same as that in the fourth embodiment. The specific implementation process of the UE performing the random access process on the Cdl_2 and performing the random access failure process is as shown in FIG. 10, and may include the following steps:

Step 1001 - Step 1004: The same as steps 701-704;

Step 1005: The UE does not receive the random access response message fed back by the eNB within a specified time, and determines that the random access fails.

Step 1006: The UE considers that the random access procedure fails, and performs an RRC re-establishment process. It should be noted that the foregoing embodiment describes a random access procedure using a dedicated preamble. For a random access procedure using a common preamble, if the UE does not receive the random access corresponding message, or the transmission scheduling transmission fails, or does not receive The conflict resolution message is considered to be a failure of the random access procedure. The random access failure processing method at this time is the same as the above embodiment, and is no longer described.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

Claim

A method for processing a random access failure of a secondary serving cell, wherein the method includes: after the user equipment fails to access the random access on the Scell, the UE stops receiving the control signaling corresponding to the Scdl.

The method for processing the random access failure of the Scdl according to claim 1, wherein the stopping receiving the control signaling corresponding to the Scdl includes:

Stop receiving control signaling for controlling the behavior of the Scell uplink carrier;

Or stopping receiving control signaling for controlling the behavior of the downlink carrier of the Scell; or stopping receiving control signaling for controlling the behavior of the uplink carrier of the Scell and control signaling for controlling the behavior of the downlink carrier of the Scdl.

The method for processing the random access failure of the Scdl according to claim 1 or 2, wherein the stopping receiving the control signaling corresponding to the Scdl is: when the Scdl is scheduled across carriers, the The UE stops receiving control signaling for controlling the Scell on the carrier that schedules the Scdl.

The method for processing a random access failure of the Scdl according to claim 1 or 2, wherein the stopping receiving the control signaling corresponding to the Scdl is: stopping when the Scdl is not scheduled by a cross-carrier Receiving control signaling indicated by system message block 2SIB2 in the configuration of the Scdl on the UE.

A method for processing a random access failure of an Scell, the method includes: when the UE fails to access the Scdl randomly, the eNB instructs the UE to delete the configuration of the Scdl or deactivate the Scdl;

The UE deletes the configuration of the Scdl or deactivates the Scdl according to the indication of the eNB.

The method for processing the random access failure of the Scdl according to claim 5, wherein, when the UE fails to randomly access the Scdl, the eNB instructs the UE to delete the configuration or go to the Scdl. Activate the Scdl as:

When the UE fails to access the Scdl, the UE notifies the eNB that the random access to the Scdl fails; after receiving the notification, the eNB instructs the UE to delete the configuration of the Scdl or deactivate the Scdl;

The method for processing the random access failure of the Scdl according to claim 6, wherein the UE notifying the eNB that the random access to the Scdl fails is: the UE transmitting the serving cell including the Scdl to the eNB An access failure notification message for the identity, or secondary serving cell identity, or bitmap.

A method for processing a random access failure of an Scell, the method comprising: performing a radio resource control RRC reestablishment process when the UE fails to access the Scdl randomly.

A processing device for failing random access of an Scell, the device comprising: a receiving unit, configured to stop receiving, by the UE, control signaling corresponding to the Scdl after a random access failure on the Scdl.

The Scell random access failure processing apparatus according to claim 9, wherein the receiving unit is configured to stop receiving control signaling for controlling the behavior of the Scdl uplink carrier, or stop receiving for control. Controlling signaling of the downlink carrier behavior of the Scell, or stopping receiving control signaling for controlling the behavior of the Scdl uplink carrier and control signaling for controlling the behavior of the downlink carrier of the Scdl.

The processing device for the random access failure of the Scdl according to claim 9 or 10, wherein the receiving unit is further configured to stop receiving the carrier that schedules the Scdl when the Scdl is scheduled across carriers. Controlling control signaling of the Scell.

12. The processing device for random access failure of the Scdl according to claim 9 or 10, The receiving unit is further configured to stop receiving the control signaling indicated by the SIB2 in the configuration of the Scdl on the UE when the Scdl is not scheduled to be cross-carrier.

A device for processing a random access failure of a Scdl, the device comprising: a reconstruction unit, configured to perform an RRC reestablishment process when a UE fails to access the Scdl randomly.

A processing system for failing random access of a Scdl, the system comprising: an indication unit and an action unit;

The indicating unit is configured by the eNB, when the UE fails to access the Scell randomly, instructing the UE to delete the configuration of the Scdl or deactivate the Scdl;

The processing system of the Scell random access failure according to claim 14, wherein the system further comprises: a notification unit, configured to be used by the UE, to notify the indication unit when the UE randomly fails to access the Scell The UE fails to randomly access the Scdl;

The indication unit is further configured to: after receiving the notification of the notification unit, instruct the UE to delete the configuration of the Scdl or deactivate the Scdl.

The processing system of the Scell random access failure according to claim 14, wherein the system further comprises: a detecting unit, configured to be used by the eNB, configured to detect, when the UE randomly fails to access the Scell, notify the station The instruction unit fails to randomly access the Scdl by the UE;

The indication unit is further configured to: after receiving the notification by the detecting unit, instruct the UE to delete the configuration of the Scdl or deactivate the Scdl.