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Caching and D2D Assisted wireless emergency Communications networks with Statistical QoS Provisioning

Journal of Communications and Information networks 2020年第3期5卷 282-293页

作者： Jianyu Wang Wenchi Cheng Hailin Zhang State Key Laboratory of Integrated Services networks Xidian UniversityXi’an 710071China

Along with natural disasters,the destruction of communication infrastructures leads to the congestion or failure of communication *** aerial vehicles(UAVs),which are with a high flexibility,can be employed as temporary base stations to establish emergency *** relieve the backhaul burden of UAVs,some imperative contents can be cached by terrestrial cache-enabled rescuers(CERs)and provide for victims with device-to-device(D2D)*** support the effectiveness and timeliness of emergency communication,the delay-bounded quality-of-service(QoS)requirement and network throughput are desired to be comprehensively considered,which imposes a new challenge for caching placement and CER *** this paper,we focus on joint caching placement and CER deployment to maximize the effective capacity subject to delay-bounded QoS *** overall non-convex problem is transformed into the caching placement and the CER deployment ***,we develop the QoS-aware caching placement scheme with fixed CER deployment density and obtain the QoS-aware CER deployment density with fixed caching *** on the block-coordinate descent method,we also propose the joint caching placement and CER deployment scheme,which can not only effectively enhance average effective capacity but also guarantee the delay-bounded QoS ***,numerical simulations are conducted to show the performances of the proposed schemes.

关键词： unmanned aerial vehicles(UAVs) device-todevice(D2D) emergency wireless networks quality-ofservice(QoS) caching placement effective capacity

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