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D2D multicast communication resource distribution method based on graph theory

A technology of resource allocation and multicast communication, applied in broadcast service allocation, wireless communication, electrical components, etc., can solve problems such as poor channel quality and inability to base station multicast communication

Inactive Publication Date: 2016-09-28
重庆信科设计有限公司
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Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide a D2D multicast communication resource allocation method based on graph theory, so as to solve the problem that edge users cannot perform multicast communication with the base station due to poor channel quality, and at the same time solve how to Under the premise of ensuring the QoS of cellular users, further improve the spectral efficiency of the system;

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  • D2D multicast communication resource distribution method based on graph theory
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  • D2D multicast communication resource distribution method based on graph theory

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[0039] The present invention will be described in detail below in conjunction with accompanying drawing:

[0040] Such as Figure 1~5 Shown:

[0041] The present invention provides a D2D multicast communication resource allocation method based on graph theory, the method is as follows figure 1 shown, including:

[0042] The system is an LTE-A single-cell cellular system, and some user equipments are randomly distributed in the cell, and the base station eNB sends multicast data to these user equipments; for example, emergency communication in emergency situations, merchants sending promotional information, and government departments sending publicity Educational information, sending relevant information during large-scale gatherings, etc. At this time, due to the poor channel conditions of the edge user equipment, it is difficult or even impossible for some users to receive the data sent by the eNB; this part of users is called NACK users, such as figure 1 Indicated by a wh...

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Abstract

The invention discloses a D2D multicast communication resource distribution method based on a graph theory. The method mainly comprises the following steps of (1) based on a state of maximumly using resources, carrying out multicast clustering of cluster head number minimization; (2) in order to increase a system throughput, using a multicast cluster receiving end reselection algorithm to find an appropriate cluster head for a multicast cluster receiving end again; (3) using a graph theory coloring theory to divide a D2D multicast cluster user into non-intersect sets; (4) under the condition of guaranteeing a cellular user QoS, taking a maximized system throughput as an object, using a KM algorithm in the graph theory to distribute the resources for the D2D multicast cluster users so that the plurality of D2D multicast cluster users reuse a wireless resource of the same cellular user.

Description

technical field [0001] The present invention relates to the field of mobile communication, in particular to a resource allocation method for D2D multicast communication. Background technique [0002] For now, with the continuous development of mobile communication technology and the sharp increase in the demand for multimedia services, the insufficient transmission rate of mobile communication and the scarcity of spectrum resources have become the main challenges in the field of mobile communication. Therefore, the LTE-A cell Introduced terminal pass-through technology. [0003] The combination of D2D communication technology and multimedia multicast technology, that is, D2D multicast technology can further improve the performance of the system. First, D2D multicast technology can forward data through relay terminals, thereby improving the data transmission rate of the entire system. Secondly, D2D multicast technology Multicast technology can enhance the performance of edge...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/00H04W72/08H04W72/54
CPCH04W84/18H04W4/06H04W72/30H04W72/543H04W72/541
Inventor 文凯卢彦博杨晏川董宏成
Owner 重庆信科设计有限公司
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