Rapid random access method of TD-LTE cluster system user

Abstract

The invention discloses a rapid random access method of a TD-LTE cluster system user. The rapid random access method comprises the following steps: a cluster proxy access user is selected; the cluster proxy access user sends a proxy access request RA to a base station; the base station reads the random access request and sends a random access reply message RAR to the cluster proxy access user over a cluster paging channel; the cluster proxy access user sends proxy scheduling transmission information to the base station after receiving the RAR message; the base station sends a competition solution success message to the cluster proxy access user to indicate that all the users in a cluster group are in a connection established status; and the cluster proxy access user notifies all the cluster ordinary access users of successful access. The random access manner of the users within the cluster group is changed and the cluster proxy access user is employed to represent all the users in the cluster group to interact with the base station, and therefore, the problem of collision due to simultaneous access of all the users of the cluster group is solved fundamentally. Hence, the access time of the users of the cluster group is shortened and the 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. mobile communication system. 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) key, the channel utilization rate is high, the call connection is fast, the call establishm...

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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