Downlink frequency spectrum resource distribution method with D2D technology introduced in cellular network

A spectrum resource allocation and spectrum resource technology, applied in the field of spectrum resource allocation, can solve the problem of low resource utilization efficiency, reduce mutual interference, improve system spectrum efficiency, and reduce algorithm complexity

Active Publication Date: 2015-06-17
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional cellular mobile communication network is controlled in a centralized manner, that is, two terminal devices are very close to each other, and the communication between the terminal devices must still be carried out through the base station, that is, its resource utilization efficiency is not high in certain scenarios

Method used

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  • Downlink frequency spectrum resource distribution method with D2D technology introduced in cellular network
  • Downlink frequency spectrum resource distribution method with D2D technology introduced in cellular network
  • Downlink frequency spectrum resource distribution method with D2D technology introduced in cellular network

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Embodiment Construction

[0025] The present invention is described in further detail below in conjunction with accompanying drawing:

[0026] In order to facilitate understanding, the present invention takes the D2D communication network under the LTE-A system as an example to describe the introduction of the D2D technology into the cellular network.

[0027] The present invention will be described in detail below in combination with simulation and accompanying drawings. Concretely comprise the following steps: Step (1): the determination of interference limited area (ILA)

[0028] in the system model figure 1 , User D T with D R Establish a D2D communication link between CUE 1 , CUE 2 ,..., CUE n For cellular users, the base station BS allocates downlink spectrum resources for the D2D link. According to the LTE system requirement index defined by 3GPP TR25.913, a single cell occupies a system bandwidth of 20MHz, and each cellular user occupies t basic resource blocks (180KHz) (t =1,2,3,...,n)....

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Abstract

The invention discloses a downlink frequency spectrum resource distribution method with the D2D technology introduced in a cellular network. The method includes the following steps that (1) in the downlink time slot, an interference limited area (ILA) of cellular users is used for reducing the inference to the cellular users by D2D users, and thus the normal communication of the cellular users can be guaranteed; (2) frequency spectrum resources are distributed to D2D communication links by using the sum capacity maximization of cellular links and D2D links in the system as the target; (3) when different D2D links are distributed with the same frequency spectrum resource, and a heuristic optimization algorithm is used by a base station to conduct frequency spectrum resource redistribution on the D2D links distributed with the same frequency spectrum resource in order to avoid the interference between the D2D links.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a method for allocating spectrum resources by introducing D2D technology into a cellular network. Background technique [0002] With the development of mobile communications, the third generation of mobile communications has been commercially available. The industry is putting more effort into the development of the next generation wireless communication network, such as the Long Term Evolution (LTE / LTE-A) of 3GPP. As one of the candidate standards of the fourth generation mobile communication system IMT-Advanced, LTE-A meets the compatibility, peak transmission rate and spectrum efficiency requirements proposed by IMT-A to a certain extent. At the same time, high speed, large capacity, and higher quality of service (QoS) of wireless cellular communication networks are inevitable trends, and how to use limited bandwidth resources more effectively to achieve wireless broadban...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/08
CPCY02D30/70
Inventor 廖学文张阳邓建国
Owner XI AN JIAOTONG UNIV
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