Method for ensuring RRC (Radio Resource Control) signaling time sequence at UE (User Equipment) side

Abstract

The invention discloses a method for ensuring an RRC (Radio Resource Control) signaling time sequence at the UE (User Equipment) side, which comprises the following steps of: transmitting an RRC connection setup request by the UE; carrying out message analysis processing on a received RRC connection setup message by the UE; if the RRC connection setup message is correct, transmitting an RRC connection setup completion message to an AM RLC (Radio Link Control) entity of an RLC layer and indicating the RLC layer for transmitting confirmed response in an RLC-AM interface; and if an RRC layer of the UE receives the confirmed response derived from the RLC layer, transmitting an initial direct transfer message to the network side and establishing signaling connection with a CN (Core Network). The invention adopts the confirmed response of the RLC AM as a basis for successfully transmitting signaling data to the network side, eliminates the condition that the initial direct transfer message arrives at the network side prior to the RRC connection setup completion message and ensures that signaling can arrive at the network side RRC in sequence.

Description

technical field [0001] The present invention relates to the third-generation mobile communication technology, in particular to a method for ensuring RRC signaling timing at the UE side in the high-layer protocol stack of the third-generation mobile communication system. Background technique [0002] In the third-generation mobile communication system, the high-level protocol stack includes the non-access layer and the access layer. The non-access layer mainly performs signaling interaction between the user terminal (referred to as UE) and the core network (referred to as CN), such as Authentication, location area routing area registration, voice service, packet service, etc. The access layer mainly performs signaling interaction between the mobile terminal and the radio network control unit (referred to as RNC), and the radio resource control module (referred to as RRC) of the access layer is responsible for the connection establishment of the wireless link and The bearer o...

AI Technical Summary

Problems solved by technology

When processing the message, the UE side can ensure that the message RRC CONNECTION SETUP COMPLETE is sent before the INITIAL DIRECT TRANSFER message, but since these two messages are carried on different RBs (RB2 and RB3), the sending process at the RLC layer is completely independent , in the case of wireless interference, RB2 or (and) RB3 may retransmit data, which makes the network-side RRC entity uncertain about the timing of receiving these two messages, and the INITIAL DIRECT TRANSFER message sent after the existence of When the RRC CONNECTION SETUP COMPLETE message arrives at the network side RRC

When the INITIAL DIRECT TRANSFER message arrives at the RRC on the network side before the RRC CONNECTION SETUP COMPLETE message, since the RRC on the network side has not received the RRC CONNECTION SETUP COMPLETE message at this time, the RRC on the network side is still in the state of the connection establishment process. The INITIAL DIRECT TRANSFER message will be discarded, so that the network will wait for the arrival of the INITIAL DIRECT TRANSFER after receiving the RRC CONNECTION SETUP COMPLETE message, and the UE will not retransmit the INITIAL DIRECT TRANSFER, resulting in the final network The end releases the connection due to timeout, causing the requested NAS service to fail

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