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Method and device for processing radio link failure under carrier aggregation scene

A wireless link failure and processing method technology, which is applied in the field of wireless link failure processing, can solve the problems of not being able to start the RRC connection re-establishment process in a timely manner, and service experience deterioration

Active Publication Date: 2011-04-27
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the carrier aggregation scenario, since the physical layer evaluation cycle configured for each carrier is different, if all the carriers of the UE have a radio link failure (Radio Link Failure, RLF), from the time when the UE detects the radio link failure of the first carrier to The time interval for detecting the failure of the last carrier radio link will be very long, so that the UE will not be able to start the RRC connection re-establishment process in time, which is for the UE to use delay emergency services, such as VoIP (Voice Over IP, IP voice ) business, such a long interruption time will make the user's business experience worse

Method used

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  • Method and device for processing radio link failure under carrier aggregation scene
  • Method and device for processing radio link failure under carrier aggregation scene
  • Method and device for processing radio link failure under carrier aggregation scene

Examples

Experimental program
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Effect test

Embodiment 1

[0043] See figure 2 , UE detects at least one downlink carrier radio link failure, or detects at least one uplink carrier radio link failure, or detects at least one carrier has a physical layer problem, or detects at least one carrier random When the random access of the access channel RACH fails, the following detection and judgment steps are adopted:

[0044] 21. The UE uses the shortest physical layer evaluation period to perform radio link detection for all downlink carriers.

[0045] The UE wakes up each downlink carrier in the Discontinuous Reception (DRX) state, and uses the shortest physical layer evaluation period for all downlink carriers to perform carrier quality evaluation, and reports a synchronization or out-of-synchronization indication to the RRC layer.

[0046] Among them, the length of the physical layer evaluation cycle is related to the discontinuous reception (DRX) cycle of the UE. Since the configured DRX cycle is related to the QoS requirements of th...

Embodiment 2

[0060] See image 3 , UE detects at least one downlink carrier radio link failure, or detects at least one uplink carrier radio link failure, or detects at least one carrier has a physical layer problem, or detects at least one carrier random When the random access of the access channel RACH fails, the following detection and judgment steps are adopted:

[0061] 31. The UE initiates RACH random access to all uplink carriers;

[0062] 32. If RACH random access is successful on at least one uplink carrier, then judge that the wireless links of some uplink carriers and downlink carriers are normal; if RACH random access fails on all uplink carriers, judge all uplink and / or all downlink The radio link to the carrier has failed.

[0063] Wherein, the UE can initiate RACH random access to all uplink carriers in a serial or parallel manner.

[0064] Corresponding to the serial mode, the UE first selects an uplink carrier to initiate RACH random access, if the RACH random access of...

Embodiment 3

[0069] See Figure 4 , UE detects at least one downlink carrier radio link failure, or detects at least one uplink carrier radio link failure, or detects at least one carrier has a physical layer problem, or detects at least one carrier random When random access to the access channel RACH fails, any of the following detection schemes is used:

[0070] 41. When the UE receives an indication that the automatic repeat request (Automatic Repeat Request, ARQ) sent by the RLC layer exceeds the maximum number of retransmissions at the RRC layer for N consecutive times, it judges that the radio links of all uplink carriers fail; or,

[0071] 42. When the RRC layer receives an indication that the ARQ sent by the RLC layer exceeds the maximum number of retransmissions for the first time, the UE starts a second timer. Before the second timer expires, if the RRC layer continues or is not When receiving N consecutive indications that the ARQ sent by the RLC layer exceeds the maximum numbe...

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Abstract

The embodiment of the invention discloses a method and a device for processing radio link failure under a carrier aggregation scene, which can ensure that user equipment (UE) can reconstruct radio resource control (RRC) connection in time. One method provided by the invention comprises the following steps of: when the radio link failure of at least one downlink carrier is detected, or the radio link failure of at least one uplink carrier is detected, or the physical layer problem of at least one carrier is detected, or the random access failure of a random access channel (RACH) of at least one carrier is detected, starting radio link normality or failure judgment of all carriers, and / or starting a first timer. The other method provided by the invention comprises the following step of: when the need of RRC connection reconstruction is judged, selecting a carrier in a service aggregation cell or selecting a low-frequency carrier in the service aggregation cell to initiate an RRC signaling connection request.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method and device for processing wireless link failure in a carrier aggregation scenario. Background technique [0002] In a wireless communication system, a user equipment (User Equipment, UE) detects the signal quality of a neighboring cell using the carrier according to the carrier information sent by the network side. For a carrier aggregation system such as a long-term evolution advance (LTE-A) system, a UE may have multiple carriers serving it at the same time, and carrier aggregation under one base station is called an aggregation cell. [0003] When the aggregated cell provides services for the UE, the UE can simultaneously use multiple uplink and downlink carriers for data transmission. If only some carriers (uplink and / or downlink) have radio link failures, the UE can still communicate with the base station through other carriers that do not fail. Only ...

Claims

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Application Information

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IPC IPC(8): H04W24/08H04W56/00H04W76/02H04W74/08
Inventor 宋巍巍陈玉华于映辉李亚娟
Owner HUAWEI TECH CO LTD
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