Multi-user D2D communication resource allocation method based on spectrum allocation and power control

Abstract

The invention discloses a multi-user D2D communication resource allocation method based on spectrum allocation and power control. The method comprises the following steps: 1) calculating a D2D user jand a cellular user i after sharing the same spectrum resource; 2) judging whether the D2D user j can reuse the spectrum resource of the cellular user i; 3) calculating an interference coefficient between the D2D user and the reusable cellular user; 4) enabling the D2D user to select the spectrum resources of the cellular user for multiplexing, so that the interference coefficient of the system isminimum; 5) solving the optimal transmitting power of the D2D user on the premise of meeting the lowest SINR of the D2D user and the cellular user; 6) calculating the throughput capacity of the system. According to the method, the frequency spectrum utilization rate of the system can be improved, same-frequency interference existing when the D2D user and the cellular user share the same frequencyspectrum resource is restrained, and the throughput of the system is increased while the lowest SINR of the cellular user and the D2D user is guaranteed.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a multi-user D2D communication resource allocation method based on frequency spectrum allocation and power control. Background technique [0002] With the explosive growth of multimedia data and the continuous popularization of mobile devices, users have put forward more stringent requirements for the accuracy and real-time performance of data transmission. Facing the rapid growth of data traffic, the problem of insufficient wireless resources in traditional cellular networks has become increasingly prominent. As one of the key technologies in the future communication architecture, device-to-device (D2D for short) communication provides a new direction to solve the above problems, using the D2D communication technology of Underlay mode to replace the base station (BS for short) Realize partial near-field communication, and improve network access and load capacity....

AI Technical Summary

Problems solved by technology

In the Overlay management mode, D2D users will obtain a part of independent spectrum resources from cellular users for D2D communication, while in the Underlay management mode, cellular users will use their own spectrum resources with D2D users. Therefore, Using the Underlay mode can maximize the utilization of spectrum. However, when D2D users reuse the spectrum resources of cellular users, there will be co-channel interference between D2D users and cellular users, which will affect the throughput of the system.

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