Method and device for device-to-device communication

A device-to-device and user equipment technology, applied in the field of communication, can solve problems such as difficulty in ensuring the effective coexistence of D2D links and cellular links, in-band interference, flooding, etc., to achieve elimination of in-band interference, elimination of power imbalance, and cost-effective Effect

Active Publication Date: 2014-11-12
ALCATEL LUCENT SHANGHAI BELL CO LTD
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Problems solved by technology

This power imbalance can lead to severe in-band interference such that the desired signal in the D2D link is overwhelmed by the signal of the user equipment communicating at high power in the cellular link
Therefore, even if orthogonal resources in the frequency domain are allocated for D2D links and cellular links, it is difficult to guarantee the effective coexistence of D2D links and cellular links

Method used

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  • Method and device for device-to-device communication
  • Method and device for device-to-device communication
  • Method and device for device-to-device communication

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Embodiment Construction

[0020] The principle and spirit of the present invention will be described below with reference to several exemplary embodiments shown in the accompanying drawings. It should be understood that these embodiments are described only to enable those skilled in the art to better understand and implement the present invention, but not to limit the scope of the present invention in any way.

[0021] The general idea of ​​the present invention is: when two user equipments in a wireless cellular communication system such as LTE are to perform D2D communication, the base station of the cellular communication system can allocate resources originally used for cellular communication for The resources of the D2D communication (for example, dedicated communication bandwidth and carrier frequency). The user equipment can then perform D2D communication using the resources allocated by the base station. In this way, D2D links and cellular links can be flexibly multiplexed in the frequency dom...

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Abstract

The embodiment of the invention relates to a method and device for device-to-device communication. When two sets of user equipment in a cellular communication system need to execute D2D communication with each other, a base station of the cellular communication system can distribute resources originally used for cellular communication as the resources for D2D communication, for example, communication bandwidth and carrier frequency, and then the user equipment can utilize the resources distributed by the base station to execute D2D communication. In this way, a D2D link and a cellular link can be multiplexed flexibly in a frequency domain, and the problems of power imbalance, in-band interference and the like in D2D communication are solved while compatibility and cost are taken into consideration.

Description

technical field [0001] Embodiments of the present invention relate to communication technologies, and more particularly, to a method and apparatus for device-to-device communication in a cellular communication system. Background technique [0002] A device-to-device (Device-to-Device, D2D) communication mechanism has been proposed as an enhancement to cellular communication systems such as Long Term Evolution (Long Term Evolution). In D2D communication, user equipments (UEs) that are close to each other usually have high-quality communication channels, and thus can directly communicate at a higher data rate. D2D communication can achieve many benefits, such as reducing the workload of a base station (BS). [0003] Many cellular communication networks, such as LTE, provide a transmission mechanism of frequency division multiplexing for multiplexing in the frequency domain the data transmission of multiple user equipments over a cellular link. When incorporating D2D communic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W76/00H04W72/04
Inventor 刘勇邓云杨凯蔡立羽
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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