QoS-based clustered channel allocation method in D2D communication system

A technology of communication system and channel allocation, applied in the directions of transmission path sub-channel allocation, transmission system, wireless communication, etc., can solve the problems of impairing communication quality, reducing system performance, etc. Effect

Active Publication Date: 2017-07-14
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

When the multiplexing mode is used, if the interference between users cannot be effectively controlled,

Method used

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  • QoS-based clustered channel allocation method in D2D communication system
  • QoS-based clustered channel allocation method in D2D communication system
  • QoS-based clustered channel allocation method in D2D communication system

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Embodiment Construction

[0028] Below in conjunction with embodiment and accompanying drawing, the technical solution of the invention is described in detail:

[0029] The system model of the present invention is attached figure 2 As shown, considering the single cell scenario, the cell radius is R, the base station is located in the center of the cell, and M cellular users and N pairs of D2D users are randomly distributed in the cell, C k and D i Denote cellular user k and D2D user pair i, respectively. M cellular users use M independent and orthogonal subchannels and the subchannels have been allocated. Without loss of generality, it is considered that cellular user k uses the kth subchannel, and D2D users multiplex the downlink resources of cellular users for communication. Considering dense D2D communication scenarios, the number of D2D users is greater than the number of cellular users. The present invention allows a channel of one cellular user to be used by multiple pairs of D2D users, and ...

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Abstract

The invention discloses a QoS-based clustered channel allocation method in a D2D communication system. According to the QoS-based clustered channel allocation method, the concept of user satisfaction degree is introduced for better satisfying different QoS requirements of D2D users in the situation that the D2D users multiplex cellular user downlink resources, and a graph coloring method is adopted for allocating channels to the D2D users. The QoS-based clustered channel allocation method comprises the specific steps of: firstly, constructing an interference pattern among the D2D users; secondly, establishing an available color list of the D2D users while guaranteeing the QoS requirements of cellular users; and finally, defining effectiveness of using different colors by the D2D user based on user satisfaction degree and system fairness, and clustering the D2D users based on the same, wherein the users in the same cluster can share a cellular user channel. The QoS-based clustered channel allocation method can improve the satisfaction degree of the D2D users while effectively guaranteeing the QoS requirements of the cellular users, and takes the fairness among the users into account.

Description

technical field [0001] The invention relates to a QoS-based clustering channel allocation method in a D2D multiplexing mode, and belongs to the technical field of wireless communication. Background technique [0002] At present, the 3GPP (Third Generation Partnership Project) organization has listed D2D (Device-to-Device) communication technology as one of the key technologies of the fifth generation mobile communication (5G, 5-generation). D2D communication is a new technology that allows short-distance user terminals to communicate directly through dedicated spectrum or multiplexed cellular network spectrum under the control of base station or core network. Since D2D communication does not pass through the base station relay, it is beneficial to save device power, unload cellular traffic and reduce the burden on the base station. Compared with other wireless communication technologies (such as WiFi, Bluetooth, and ZigBee) that work in unlicensed frequency bands, D2D commu...

Claims

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Application Information

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IPC IPC(8): H04W72/08H04L5/00
CPCH04L5/003H04W72/543
Inventor 朱琦石纯子
Owner NANJING UNIV OF POSTS & TELECOMM
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