QoS-based resource allocation scheme for Device-to-Device (D2D) radio underlaying cellular networks

Device-to-Device (D2D) communication underlaying cellular network is considered to be a promising resource reuse technique, and it is basically developed for lots of local services. Considering the differences of the quality of services (QoS) between cellular and D2D users, the resource allocation scheme for D2D should flexibly allocate resource for D2D, rather than limiting one D2D user to share resource with one cellular user. A QoS-based resource allocation scheme for D2D users in the context of an OFDM-based air interface is proposed. This scheme exploits the QoS information, especially the rate target of users, to allocate sufficient resource as need. In addition, the system efficiency can be improved as the proposed resource allocation scheme always select the most efficient resource for D2D users. Numerical results corroborate that the proposed scheme can fulfill D2D user's QoS requirements effectively, and meanwhile accommodate different QoS requirements flexibly.

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