Device-to-device (D2D) communication, which enables a user equipment to communicate with another nearby UE directly over a D2D link without going through the central base station (BS), have attracted great research in...
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ISBN:
(纸本)9781479984060
Device-to-device (D2D) communication, which enables a user equipment to communicate with another nearby UE directly over a D2D link without going through the central base station (BS), have attracted great research interests for future applications on high data rates and spectral efficiency. In this work, we investigate multi-pair D2D communications with a multiple antenna relay under three possible schemes: (i) Direct D2D transmission;(ii) Multi-hop D2D with analog networkcoding where the relay will help multi-pair D2D transmission by amplify-and-forwarding mixed received signals;(iii) Multi-hop D2D with space time analog networkcoding where the relay will help multi-pair D2D transmissions by amplify-and-forwarding mixed received signals together with space time coding techniques. Specifically, three pairs of D2D communications with a two-antenna relay are modeled and space-time analog networkcoding based on Alamouti scheme is applied. We compare the D2D sum rate and bit error rate performance of different schemes under different channel scenarios.
A new approach, named TCP-I2NC, is proposed to improve the interaction between networkcoding and TCP and to maximize the network utility in interference-free multi-radio multi-channel wireless mesh networks. It is gr...
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A new approach, named TCP-I2NC, is proposed to improve the interaction between networkcoding and TCP and to maximize the network utility in interference-free multi-radio multi-channel wireless mesh networks. It is grounded on a network Utility Maxmization (NUM) formulation which can be decomposed into a rate control problem and a packet scheduling problem. The solutions to these two problems perform resource allocation among different flows. Simulations demonstrate that TCP-I2NC results in a significant throughput gain and a small delay jitter. network resource is fairly allocated via the solution to the NUM problem and the whole system also runs stably. Moreover, TCP-I2NC is compatible with traditional TCP variants.
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