Method and device for determining effectiveness of HARQ feedback mode in RRC reconfiguration message

Abstract

The invention provides a method and a device for determining effectiveness of an HARQ (Hybrid Automatic Repeat Request) feedback mode in an RRC (Radio Resource Control) reconfiguration message. The method comprises the following steps that: a physical layer sends the RRC reconfiguration message which is sent by a base station and carries a configuration message of the HARQ feedback mode and a delay flag bit to an RRC layer; the RRC layer analyzes the RRC reconfiguration message, and configures an HARQ feedback mode and a delay flag bit for the physical layer according to the RRC reconfiguration message; if the RRC layer configures a HARQ feedback mode and a latency flag bit to the physical layer earlier than the sending moment of the HARQ-ACK message, the physical layer does not take effect on the delay flag bit after the delay flag bit is configured, and the HARQ-ACK message is sent to the base station by using the HARQ feedback mode before configuration at the sending moment of HARQ-ACK message, the delay flag bit is immediately effective after the HARQ-ACK message is sent, otherwise, the delay flag bit is immediately effective after the delay flag bit is configured. According tothe invention, the condition that the determination of the configuration effective time is not matched between the base station side and the terminal UE side can be overcome, so that unnecessary downlink retransmission behaviors of the base station are avoided, and the network performance is improved.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a method and device for determining the effectiveness of a HARQ feedback mode in an RRC reconfiguration message. Background technique [0002] In the LTE system, the base station sends an RRC (Radio Resource Control, radio resource control) reconfiguration message to the UE, and the RRC reconfiguration message carries a new configuration of the HARQ (Hybrid Automatic Repeat Request, Hybrid Automatic Repeat Request) feedback mode change , For example, from HARQ bundling feedback mode to HARQ multiplexing feedback mode, from R9 HARQ multiplexing feedback mode to single CC (Component Carrier, component carrier) PUCCH format1b, from single CC HARQ feedback mode to 2CC HARQ feedback mode, and the change from the HARQ feedback mode of n CC to the HARQ feedback mode of n+1CC, etc., after receiving the RRC reconfiguration message, the UE configures the parameters of the ...

AI Technical Summary

Problems solved by technology

[0018] The method and device for determining the validity of the HARQ feedback mode in the RRC reconfiguration message provided by the present invention can overcome the mismatch between the base station side and the terminal UE side in determining the configuration validation time by specifying the configuration validation time points on the terminal side and the base station side situation, thereby avoiding unnecessary downlink retransmission behavior of the base station and improving network performance

Images