Method for receiving wireless broadband cluster data service by idle-state called cluster terminal

Abstract

The invention belongs to the field of LTE communication, particularly relates to a method, a system and a device for receiving wireless broadband cluster data service by an idle-state called cluster terminal, and aims to solve the problems that a non-speaking-right user in an RRC idle state receives data packets discontinuously in a cross-cell manner and signaling storm is generated due to retransmission of lost data packets through a special bearer. The method comprises the following steps: after cell reselection, whether data packet loss exists or not is judged based on a PDCP serial numberof the last packet of valid data received by a non-speaking right user in a source cell and a PDCP serial number of a first packet of valid data received by a target cell; if so, a PRACH preamble corresponding to the lost data packet is obtained and the PRACH preamble is sent to the base station side of the target cell; and the base station side retransmits the lost data packet to the user according to the PRACH preamble. According to the invention, the continuity of receiving data packets is ensured, the signaling storm of an air interface is avoided, and the utilization rate of air interfaceresources is improved.

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:

Images