Method and device for using direct terminal time-frequency resources

Abstract

The present invention relates to a method for using time-frequency resources of a direct terminal. The present invention enables a master terminal to meet the communication bandwidth requirements of the current service, the wireless channel conditions to the slave terminal, and the power and antenna configuration of the master terminal itself. Select the frequency domain and time domain resources suitable for the current business, so as to improve the transmission efficiency. At the same time, the master control terminal uses a pseudo-random method to select the sending time slot to send service data. The discovery signal of the adjacent master control in the communication channel, record and update the local "DMO channel wireless resource pool", and record the occupancy of the current channel time-frequency resources by the adjacent master control terminals monitored; if there is a master control terminal and its own If there is a resource conflict, search and select a non-conflicting resource according to the conflict avoidance process, notify the slave terminal, and then change to a new time-frequency resource for work. The invention also discloses a time-frequency resource utilization device of the through terminal.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for using time-frequency resources of a direct terminal. Background technique [0002] In the current technical patent, the off-network direct master control terminal broadcasts the time-frequency resource occupied by itself in the discovery channel. Among them, in the frequency domain, the semi-static root service needs to broadcast the occupied RB block resources, and generally the starting RB number of occupied resources and the number of continuously occupied RB blocks are identified. Currently, TD-LTE-based terminal off-network direct time-frequency resource occupation methods mostly adopt a complete time-division method, that is, only one master terminal is sending data in a subframe. Although this method is conducive to simplifying the frequency domain resources of the direct mode management, but it will affect the coverage capability of...

AI Technical Summary

Problems solved by technology

Currently, TD-LTE-based terminal off-network direct time-frequency resource occupation methods mostly adopt a complete time-division method, that is, only one master terminal is sending data in a subframe. Although this method is conducive to simplifying the frequency domain resources of the direct mode management, but it will affect the coverage capability of single-hop communication. When the service bandwidth demand is small, it will cause a waste of frequency resources. For time domain resources, currently LTE terminals are mainly configured to send services in uplink subframes, and only support single-hop non-confirmation.

For the TDD mode, uplink subframe resources account for a relatively small proportion, and the non-acknowledgment method cannot effectively use feedback to improve the utilization rate of wireless resources, so that technologies such as LTE AMC and HARQ cannot fully play their role

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