A rrc reconstruction optimization method

Abstract

The present application discloses a radio resource control (RRC) reconstruction optimization method, including: adding an RRC reconstruction contention resolution timer, the maximum value of the RRC reconstruction contention resolution timer is greater than the maximum value of the contention resolution timer; the network The side identifies UE capabilities. For UEs that support the RRC re-establishment contention resolution timer, use the RRC re-establishment contention resolution timer for RRC re-establishment. For UEs that do not support the RRC re-establishment contention resolution timer, use the contention resolution timer for RRC re-establishment. Applying the technical solution disclosed in this application can reduce the call drop rate and improve the success rate of RRC reconstruction, especially for the scenario where the S1 / X2 interface on the system side uses microwave transmission, and the gain is obvious.

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{sf8,sf16,sf24,sf32,sf40,sf48,sf56,sf64} [0004] 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. [0005] According to the agreement, the maximum value of the random access contention resolution timer in the RRC reestablishment process is 64ms, which requires that during the...

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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.

[0006] 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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