Fast random access method for users of td-lte trunking system

Abstract

The invention discloses a fast random access method for users of a TD-LTE trunking system, comprising the following steps: selecting a trunking proxy access user; sending a proxy random access request RA to a base station by the trunking proxy access user; Access request, send a random access response message RAR to it on the trunking paging channel; after receiving the RAR message, the trunking proxy access user sends the proxy scheduling transmission information to the base station; the base station sends the contention resolution successful to the trunking proxy access user The message indicates that all users in the cluster group have entered the connection establishment state; the cluster proxy access user informs all the ordinary access users of the cluster that the access is successful. By changing the random access mode of users in the trunking group, a trunking proxy access user is used to interact with the base station on behalf of all users in the trunking group, which fundamentally solves the problem of collision caused by simultaneous access of all users in the trunking group . Thus, the access time of the cluster group users is shortened, and network resources are saved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a fast random access method for users of a TD-LTE trunking system. Background technique [0002] LTE (Long Term Evolution, long-term evolution) is the largest technology research and development project launched by 3GPP in recent years. It has greatly increased the peak data transmission rate and reduced the wireless network delay. Industrial mobile communication systems. The trunking communication system has also achieved rapid development in recent years. It is a dedicated wireless communication system developed and applied to meet the command and dispatch needs of industry users. It has proprietary communication equipment and communication frequencies, and communicates in half-duplex mode. The acquisition and release of the channel is controlled by the Push To Talk (PTT) button, the channel utilization rate is high, the call connection is fast, the ...

AI Technical Summary

Problems solved by technology

If the cluster group users access the LTE system individually, the sum of time required for all users to successfully access the system will be longer

And because cluster group users have group characteristics, they tend to perform certain operations collectively, so a large number of users may apply for random access at the same time in a short period of time, which will not only occupy a lot of system resources, but also Moreover, the possibility of collision will be greatly increased, and the success rate will be greatly reduced, which will lead to re-connection and prolong the time for successful connection.

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