Cell reselection method for group calling terminal

Abstract

The invention discloses a cell reselection method for a group calling terminal. The method includes steps of 1, an access network performs group calling parameter configuration through system broadcast or a group calling dedicated control channel; 2, according to pilot frequency measurement configuration, after pilot frequency measurement start conditions are met, the group calling terminal starts pilot frequency measurement according to pre-configuration parameters obtained from the access network; 3, according to the reselection configuration of the group calling cell, after the pilot frequency cell reselection conditions are met, the group calling terminal starts a pilot frequency cell reselection process, selects a pilot frequency cell for residence and receives downstream group calls. The method provided by the invention solves a problem of downstream group calling data transmission loss in a pilot frequency cell selection process performed by using the cell reselection method by the cluster group calling terminal in an LTE wideband clustering system and improves data transmission reliability.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a cell reselection method for a cluster group call in an LTE broadband cluster system. Background technique [0002] The trunking system is an efficient wireless communication system that supports a large number of wireless users for group communication with a small number of wireless channels by sharing wireless channels. [0003] With the rapid development of wireless LTE broadband technology, a broadband trunking system based on LTE broadband technology has emerged as the times require. Broadband LTE technology provides a larger channel capacity for the trunking system, thereby providing strong support for the trunking system to realize broadband trunking service scheduling. . [0004] In the actual commercial scenario of the LTE broadband trunking system, due to frequency planning or network planning, there will be situations where two adjacent areas use differe...

AI Technical Summary

Problems solved by technology

The center frequency point of the covered cell Cell 1 is f1, and the center frequency point of the covered cell Cell 2 is f2. UE1, UE2, UE3, and UE4 under the cell 1 belong to the same group and are in the cluster listening user state. UE3, UE4 During the process of moving to cell 2 at the edge of cell 1, UE3 and UE4 will not be able to receive the group call downlink transmission of Cell 1 normally because UE3 and UE4 need to perform inter-frequency measurement

[0007] During the process of measuring the inter-frequency cell by the group call terminal, since the group call terminal cannot continue to monitor the downlink of the original cell, the downlink transmission data triggered by the original cell will be lost, which will cause the group call terminal to move to the edge of the inter-frequency cell. Severe packet loss occurs

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