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Channel allocation and power control method based on QoS in D2D network

A channel allocation and power control technology, applied in the field of resource allocation, can solve the problem of low resource utilization efficiency

Active Publication Date: 2016-03-30
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This centralized working method facilitates the management and control of resource interference, but the efficiency of resource utilization is low

Method used

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  • Channel allocation and power control method based on QoS in D2D network
  • Channel allocation and power control method based on QoS in D2D network
  • Channel allocation and power control method based on QoS in D2D network

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Embodiment Construction

[0027] Below in conjunction with embodiment and accompanying drawing, the technical solution of the invention is described in detail:

[0028] The D2D communication model of the present invention sharing cellular system uplink resources is as attached figure 2 As shown, it consists of a base station located in the center of the cell, M cellular users randomly distributed in the cell and N pairs of D2D users, and respectively use C={1,2,..,M} and D={1,2 ,...,N} represent the cellular user set and the D2D user set. Define an array including M×K variables and N×K variables, which are used to store the transmission power of cellular users and D2D users respectively, and initialize the array P C =O M×K and P D =O N×K . Cellular user i (1≤i≤M) occupies channel k (1≤k≤K) for communication, and D2D users reuse K channels that have been allocated to cellular users, where K represents the number of available channels, and S is defined as D2D user multiplex Use the cellular user c...

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Abstract

The invention provides a channel allocation and power control method based on subscriber's QoS. The channel allocation and power control method comprises the following steps: constructing a system model based on capacity maximum of D2D subscribers, and selecting a candidate cellular subscriber set meeting requirements for the D2D subscribers according to the minimal signal-interference-noise ratio requirement of the D2D subscribers; optimizing the transmission power of cellular subscribers and the D2D subscribers according to the method of Lagrange multipliers under the premises of meeting QoS requirements of the cellular subscribers and limiting subscriber's power; and calculating capacities of all the D2D subscribers according to the optimal transmission power of the subscribers, and allocating a channel to a D2D subscriber whose capacity is the largest, so as to realize D2D communication in a cellular network. Through joint optimization of subscriber's channel allocation and power control, the channel allocation and power control method has the advantages that each subscriber is allocated with optimal transmission power, and the channel is allocated to the D2D subscriber whose capacity is the largest, so that the energy loss of the cellular subscribers and the D2D subscribers is reduced, and the total capacity of the D2D subscribers is improved.

Description

technical field [0001] The invention relates to a resource allocation method, in particular to a channel allocation and power control method based on user QoS, and belongs to the technical field of communication. Background technique [0002] With the rapid development of wireless communication technology, the shortage of spectrum resources has become a challenge for mobile communication. In traditional cellular networks, direct communication between users is not allowed. The communication process is divided into two stages by the transfer of the base station: from the mobile terminal to the base station, that is, the uplink; from the base station to the mobile terminal, that is, the downlink. This centralized working mode facilitates the management and control of resource interference, but the resource utilization efficiency is low. In this context, D2D communication technology came into being. [0003] D2D communication is a new technology that allows short-distance ter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/24H04W52/26H04W72/08H04W72/54
CPCH04W52/241H04W52/265H04W72/543
Inventor 朱琦于宝舟朱洪波杨龙祥
Owner NANJING UNIV OF POSTS & TELECOMM
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