Straight-through self-adaptive resource distribution method for cellular communication system terminal

A cellular communication system and terminal direct connection technology, applied in wireless communication, electrical components, etc., can solve problems such as limitations, achieve the effects of reducing interference, improving D2D system capacity, and improving capacity and spectrum efficiency

Active Publication Date: 2013-03-13
白盒子(上海)微电子科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Judging from the current D2D resource allocation methods, most of the methods reuse the spectrum resources of different cellular users for each group of D2D pairs, and there is almost no mention of two or more groups of D2D pairs that reuse the same cellular user resources. method, and using two or more groups of D2D pairs to multiplex the same cellular user resources can greatly improve spectrum efficiency; at the same time, when selecting multiplexed resources for D2D pairs, it is not limited to all resources of a single cellular user, these resources There may be good and bad, if all multiplexing may cause restrictions on D2D communication

Method used

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  • Straight-through self-adaptive resource distribution method for cellular communication system terminal
  • Straight-through self-adaptive resource distribution method for cellular communication system terminal
  • Straight-through self-adaptive resource distribution method for cellular communication system terminal

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Embodiment Construction

[0022] Assume that the number of subcarriers contained in an OFDM symbol is M, and the number of cellular users and D2D pairs is N C and N D , the D2D users can directly communicate under the coordination of the base station, and the D2D users reuse the resources of the cellular users during communication.

[0023] We assume that the power of all cellular users reaching the base station is controlled at the same level P CB ,Right now

[0024] P CB = P Ci · ( d Ci ) - a , ∀ i [formula one]

[0025] P CB is a constant, P Ci is the transmit power of the i-th cellular user, d Ci is the distance from the cellular user to the base station. Then the interference power of cellular users to D2D can be written as ...

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Abstract

The invention discloses a straight-through self-adaptive resource distribution method for a cellular communication system terminal, which is specifically a resource distribution method for device-to-device (D2D) communication based on an orthogonal frequency division multiplexing system. Based on the characteristic of low transmission power of D2D users, and with consideration of the multiplex of same resources of two groups of D2D pairs, when cellular user resources are distributed to the D2D pairs, path attenuation, interference channel gains of cellular users on the D2D users and channel gains between the D2D users are considered at the same time, so that the resources with maximum equivalent channel gains are distributed to the matched D2D pairs in a self-adaptive manner so as to maximize a throughput capacity. The straight-through self-adaptive resource distribution method has the advantages that the capacity of a D2D system can be greatly improved, and an algorithm is relatively simple.

Description

technical field [0001] The invention relates to a resource allocation method based on D2D (device-to-device) communication under an orthogonal frequency division multiplexing system, and belongs to the technical field of resource allocation in mobile communication. Background technique [0002] Resource allocation is the key to the normal communication of the mobile communication system. Since the spectrum resources available for mobile communication are very limited, it is necessary to use spectrum resources more efficiently, and D2D technology emerges as the times require. Judging from the current D2D resource allocation methods, most of the methods reuse the spectrum resources of different cellular users for each group of D2D pairs, and there is almost no mention of two or more groups of D2D pairs that reuse the same cellular user resources. method, and using two or more groups of D2D pairs to multiplex the same cellular user resources can greatly improve spectrum effici...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04
Inventor 蒋雁翔刘强
Owner 白盒子(上海)微电子科技有限公司
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