Method for receiving wireless broadband trunking data service by called trunking terminal in idle state

Abstract

The invention belongs to the field of LTE communication, and specifically relates to a method, system and device for receiving wireless broadband cluster data services by a called cluster terminal in an idle state, aiming to solve the problem of discontinuous reception of data packets when a non-speaking right user in an RRC idle state crosses cells And the problem of signaling storms caused by retransmission of lost data packets through dedicated bearers. The system method includes: after cell reselection, based on the PDCP sequence number of the last packet of valid data received by the non-speaking user in the source cell and the PDCP sequence number of the first packet of valid data received by the target cell, it is judged whether there is The data packet is lost; if it exists, obtain the PRACH preamble corresponding to the lost data packet and send it to the base station side of the target cell; the base station side retransmits the lost data packet to the user according to the PRACH preamble. The invention ensures the continuity of received data packets, avoids the signaling storm of the air interface and improves the resource utilization rate of the air interface.

Description

technical field [0001] The invention belongs to the field of LTE communication, and in particular relates to a method, system and device for receiving a wireless broadband cluster data service by a called cluster terminal in an idle state. Background technique [0002] The B-TrunC (Broadband Trunking Communication) standard is a broadband trunking communication standard based on TD-LTE (TimeDivision-Long Term Evolution) technology. While maintaining backward compatibility with the 3GPP (3rdGeneration Partnership Project) version, it enhances voice trunking and multimedia Scheduling and other broadband cluster functions. [0003] In the LTE system, the trunking group call service is a typical point-to-multipoint service model. In the trunking user group, only one user with the right to speak sends service data (such as voice or video); one or more users without the right to speak The user (that is, the called cluster terminal) receives the service data through the shared cha...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned problems in the prior art, that is, when non-speaking users in the RRC idle state move across cells, the received cluster group call service data is discontinuous and missing data is retransmitted through a dedicated bearer, resulting in a large number of air interfaces For the problem of signaling interaction or even signaling storm, the first aspect of the present invention proposes a method for receiving wireless broadband cluster data services by a called cluster terminal in an idle state. The method includes:

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