Method, system and base station for realizing tti-b activation and deactivation

Abstract

The invention discloses a method, system and base station for realizing TTI-B activation and deactivation, and relates to the field of LTE. The method includes: the base station sends a radio resource control RRC connection reconfiguration message to the terminal, wherein the RRC connection reconfiguration message carries a TTI-B state transition information element, so that the terminal configures state parameters according to the TTI-B state transition information element; in response For the uplink data sent by the terminal, the base station receives the uplink data in a double decoding manner; when the base station successfully decodes the uplink data in a manner corresponding to the state parameters, the base station receives the subsequent uplink data sent by the terminal in a single decoding manner corresponding to the state parameters. The invention can realize the synchronization of the uplink transmission mode between the base station and the terminal. In addition, it can rapidly improve the voice quality of VoLTE users, and overcomes the shortcomings of traditional methods such as complex implementation, slow switching speed, and handover failure.

Description

technical field [0001] The present invention relates to the field of LTE (Long Term Evolution, 3GPP long-term evolution), in particular to a method, system and base station for realizing TTI-B (Transmission Time Interval Bundling, transmission time interval bundling) activation and deactivation. Background technique [0002] VoLTE (Voice over Long Term Evolution, 3GPP long-term evolution voice) users are severely damaged at the edge of the cell or the channel, and when the coverage is limited, the terminal cannot meet the BLER (Block Error Rat, block error rate) requirements. Therefore, the concept of TTI-B is proposed in VoLTE, which binds multiple consecutive uplink TTIs and allocates them to the same terminal, which can improve the success rate of data decoding and VoLTE uplink coverage, thereby improving VoLTE user experience. [0003] When activating and deactivating the TTI-B function based on the RRC (Radio Resource Control, radio resource control) connection reconfi...

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Problems solved by technology

[0004] However, the TTI-B method based on intra-cell handover activation and deactivation has the following problems: First, the activation and deactivation delay is increased, and the intra-cell handover method has handover and random access processes, which consumes resources and complicates the activation and deactivation process , and the activation and deactivation process has a long delay, and the handover in the cell is generally 50ms to 60ms, and the activation speed is slow, which affects the VoLTE experience of edge users

Second, the signaling overhead is increased, based on the intra-cell handover method, the random access process is increased, and in the random access process, the signaling overhead of MSG1, MSG2, MSG3 and MSG4 is increased, which leads to the increase of signaling resources of the base station Excessive consumption

Third, the VoLTE call drop rate increases. Due to the handover failure or random access failure in the process of handover and random access, in this case, VoLTE calls will be dropped, thereby increasing the VoLTE call drop rate. Seriously affect VoLTE user experience

Fourth, random access failure causes interference. Due to random access failure, the terminal will continue to increase the transmission power, and the increase in transmission power will cause interference to other terminals.

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