Time-divided transmission method capable of avoiding interference for D2D multi-casting communication system

Abstract

The invention discloses a time-divided transmission method capable of avoiding interference and adopting D2D multi-casting communication for a cellular network. The method adopts the scheme that: adapting a cluster geographical range by regulating cluster head terminal transmitting power, and carrying out time-divided transmission; namely, distributing clusters with interference terminals to different time slot transmission data to avoid cluster interference; and selecting a plurality of clusters with no interference to be transmitted in a multi-casting manner in the same time slot, and fully utilizing each time slot to improve the network transmission efficiency. Therefore the method is called an each time slot multi-cluster transmission method. The time-divided transmission method provided by the invention not only avoids interference between clusters, but also greatly reduces the number of required time slots, and the network transmission efficiency is improved.

Description

technical field [0001] The invention relates to a time-division transmission method using D2D multicast communication to avoid conflicts in a cellular network, and belongs to the technical field of wireless communication. Background technique [0002] Mobile communication technology is developing rapidly, and now 3G has entered the commercial stage. The industry is also making more efforts for the development of next-generation wireless communication technologies, for example, Long Term Evolution (LTE) and IEEE 802.16m (Institute of Electrical and Electronics Engineers) in 3GPP. In addition, 3GPP is also conducting more in-depth research on LTE-A. The development and evolution of these communication technologies are carried out under the scope of the future mobile cellular network IMT-A (International Mobile Telecommunications-Advanced). The future mobile cellular network needs to have high speed, large capacity and higher quality of service (QoS), and the corresponding ba...

AI Technical Summary

Problems solved by technology

However, the spectrum resources that can be used for cellular mobile communication are very limited. The bandwidth allocated for the mobile communication system at the World Wireless Communication Conference in 2007 was less than 600MHz. However, the demand for wireless communication bandwidth by 2020 is expected to be between 1200MHz and 1700MHz.

This method is easy to operate, because the terminal can only receive the signal of one cluster head terminal in each time slot, which avoids inter-cluster conflicts; however, because only one cluster head terminal transmits in each time slot, many The number of time slots required for broadcasting is equal to the total number of cluster head terminals, and the utilization rate of time slots is too low, resulting in a waste of a lot of time slot resources

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