Method, device and system for allocating D2D (Device-to-Device) user link and cellular user shared resources

Abstract

The invention provides a method, a device and a system for allocating D2D (Device-to-Device) user link and cellular user shared resources. The method comprises the following steps: 1 searching all feasible sharing combination pairs between cellular users who satisfy preset conditions and can share resources and D2D user links; 2 establishing corresponding relations between the D2D user links and the cellular users of the feasible sharing combination pairs and between the D2D user links and cellular user resources; 3 according to the corresponding relations, conducting cellular user resource sharing between the D2D user links which are at inferior positions and the cellular users with resources capable of being shared by the least number of D2D user links, wherein the D2D user links which are at inferior positions are the least number of D2D user links which can share the resources of the cellular users. The method, the device and the system for allocating D2D user link and cellular user shared resources have the advantages that users as many as possible are enabled to complete matching to some extent, the satisfaction of the D2D users and the cellular users is guaranteed, the computation complexity is greatly reduced under the situation of fewer performance losses, and the system resources are saved.

Description

Technical field [0001] The present invention relates to the field of mobile communication technology, and in particular to a method, device and system for allocating resources shared between D2D user links and cellular users. Background technique [0002] With the continuous development of mobile communication technology, China's mobile communication system has gradually entered the 3G era and further developed to 4G. As the transition from 3G to 4G, the LTE (Long Term Evolution) system has become a hot spot in modern communication technology. With the rapid development of mobile communications, the demand for system bandwidth continues to increase, bandwidth allocation has become more and more crowded, and the spectrum resources available for mobile communications are currently very limited, so the existing spectrum resources of the system are maximized. System throughput has become an inevitable trend. To solve this problem, D2D (Device-to-Device) communication technology came...

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Problems solved by technology

[0005] In the process of realizing the present invention, the inventors found that there are at least the following problems in the prior art: although the existing user resource matching method can solve the problem of user resource allocation to a certain extent, if the matching is performed randomly, the matching satisfaction degree and achievable The system performance is low; if only one of the D2D users and cellular users is considered, there will be a lack of fairness, and the satisfaction of both users is low; although the traditional KM algorithm can optimize the system performance, the corresponding complexity is also high. Large, especially when factors such as power optimization are also taken into account, the calculation time spent by user matching will increase greatly

However, the basic unit of physical layer scheduling in LTE is 1ms, and a few seconds of calculation time will cause a very large scheduling delay

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