Relay selection method based on D2D relay communication

A technology of relay communication and cellular communication network, which is applied in the field of relay selection based on D2D relay communication, and can solve the problem of limited maximum transmit power of mobile terminals.

Inactive Publication Date: 2014-10-15
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

In actual communication scenarios, mobile terminals are limited by the maximum transmit power

Method used

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  • Relay selection method based on D2D relay communication
  • Relay selection method based on D2D relay communication
  • Relay selection method based on D2D relay communication

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Embodiment Construction

[0059] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0060] Communication scenarios of the present invention such as figure 1 As shown, the basic communication model is as figure 2 As shown, the specific steps are as follows:

[0061] (1) Establish a single-cell cellular communication network, which consists of a base station and several cellular users, and each user is equipped with a single omnidirectional antenna. Cellular users include communication users (active users) and idle users (idle users), and each user is randomly distributed in the cell.

[0062] (2) The base station judges whether the communication energy efficiency of each communication user can meet the established service requirements and the current communication resource allocation of the cellular network and the distribution of idle users by obtaining the wireless channel status of each communication user in the cell. ...

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Abstract

The invention discloses a relay selection method based on D2D relay communication. A base station selects honeycomb communication users who do not meet energy efficiency conditions according to current honeycomb communication resource use conditions and idle user distribution conditions and the selected honeycomb communication users serve as communication users needing relay assistance, idle users meeting standards are added to a standby relay set according to the energy efficiency conditions and capacity limitation conditions so as to carry out D2D communication with the communication users needing relay assistance and assist the communication users needing relay assistance in communication with the base station, and meanwhile, transmitting power ranges of the communication users are determined according to interference limiting conditions. Accordingly, the largest signal to interference and noise ratio of communication achieved through relay assistance is obtained, best relays are correspondingly selected for the users by means of best match of a bipartite graph, D2D communication pairs are formed, and two-hop communication of the communication users and the base station is achieved. According to the relay selection method, energy efficiency of a system is effectively improved and transmission power of the communication users is reduced.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a relay selection method based on D2D relay communication. Background technique [0002] With the rapid development of wireless communication technology, the mobile communication system should provide people with more colorful data broadband services on the basis of fully meeting people's needs for voice communication. Now that the fourth-generation mobile communication system has been gradually commercialized, the industry is putting more effort into the development of the next-generation wireless communication network, such as the long-term evolution (LTE / LTE-Advanced) of 3GPP. Followed by more and more business needs of people, such as the increase of wireless multimedia services such as online video on demand and local resource sharing. This requires the mobile communication system to be able to perform high-speed data transmission with higher rate, larger capac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W40/22
CPCY02D30/70
Inventor 廖学文张群杰罗新民
Owner XI AN JIAOTONG UNIV
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