RRC reestablishment optimization method

Abstract

The invention discloses a radio resource control (RRC) reestablishment optimization method. The method comprises the steps of adding an RRC reestablishment competition solution timer, of which the maximum value is larger than the maximum value of a competition resolution timer; a network side identifying the UE capability, using the RRC reestablishment competition resolution timer to carry out RRCreestablishment for the UEs supporting RRC reestablishment competition resolution timer, and using the competition resolution timer to carry out RRC reestablishment for the UEs not supporting RRC reestablishment competition resolution timer. By applying the technical scheme disclosed by the invention, the call drop rate can be reduced, and the RRC reestablishment success rate can be improved. Thegain is obvious, especially for scenes using microwave transmission on the system side S1 / X2.

Description

technical field [0001] The present application relates to the technical field of mobile communication, in particular to an RRC reconstruction optimization method. Background technique [0002] In the current 3GPP protocol, the contention resolution timer used in the random access process in the radio resource control (RRC: Radio Resource Control) reestablishment process is the same as other contention-based random access contention resolution timers. value, whose values ​​are as follows: [0003] mac-ContentionResolutionTimer ENUMERATED{ [0004] sf8,sf16,sf24,sf32,sf40,sf48, [0005] sf56,sf64} [0006] The description of mac-ContentionResolutionTimer in 3GPP TS 36.321[6] is: contention resolution timer, the value is in subframes, the value sf8 corresponds to 8 subframes, sf16 corresponds to 16 subframes, and so on. [0007] According to the agreement, the maximum value of the random access contention resolution timer in the RRC reestablishment process is 64ms, which req...

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Problems solved by technology

However, the network side may fail to deliver the reconstruction message within 64ms due to various reasons, causing the contention resolution timer to time out and the reconstruction to fail.

[0008] The reason for the reconstruction failure may be that the internal abnormality on the network side leads to a long reconstruction processing time, and the transmission time of cross-site reconstruction related messages in the microwave transmission scenario of the S1 or X2 interface is too long

However, the maximum value of the contention resolution timer stipulated in the protocol is 64ms, which cannot be expanded.

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