Abstract

In the era of Internet-of-things (IoT), the future 5G networks are supposed to provide ubiquitous connectivity, high speed, as well as low latency and energy efficiency at low cost to billions of battery-powered wireless devices. The anticipated tremendous demand for wireless bandwidth in 5G networks calls for efficient usage of the underutilized licensed frequency spectrum that preserves the energy consumption of these energy-limited devices. This is feasible by embracing the cognitive radio concept and making use of its functionalities and capabilities to form 5G-CR incorporation. As a step towards this goal, an efficient routing protocol for cognitive radio (ERCR) networks is proposed in this paper. The proposed protocol is location-based and can fully operate over a single wireless channel using a channel access mechanism that follows the IEEE 802.11 distributed coordination function. It selects the route with the minimum number of forwarding nodes that have sufficient remaining energy. This, in turn, increases the per-node capacity to meet the operational requirements of different IoT applications. Meanwhile, it conserves the limited energy of battery-powered devices. The efficiency of the proposed protocol has been evaluated using extensive network simulator-2 computer simulations for a wide range of performance metrics under different activity levels of licensed users in terms of channel occupancy likelihood and duration. The simulation results reveal that ERCR is capable of providing reliable packet delivery at a low packet transfer latency while saving the energy of the cognitive radio network nodes with a fairly small overhead.

中文翻译：

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用于能量受限设备的认知无线电网络的有效路由协议

摘要

在物联网（IoT）时代，未来的5G网络应该以低成本为数十亿电池供电的无线设备提供无处不在的连接性，高速，低延迟和高能效。5G网络中对无线带宽的巨大需求预计将有效利用未充分利用的许可频谱，以保留这些受能量限制的设备的能耗。通过拥抱认知无线电概念并利用其功能性和能力来形成5G-CR合并，这是可行的。作为朝这个目标迈进的一步，本文提出了一种用于认知无线电（ERCR）网络的有效路由协议。所提出的协议基于位置，并且可以使用遵循IEEE 802.11分布式协调功能的信道访问机制在单个无线信道上完全运行。它选择具有最少剩余能量的最少数量的转发节点的路由。反过来，这增加了每个节点的容量，以满足不同物联网应用程序的运行要求。同时，它节省了电池供电设备的有限能量。在通道占用可能性和持续时间方面，已使用许可的用户在不同活动级别下使用广泛的网络模拟器2计算机模拟对广泛的性能指标进行了评估，所提出协议的效率。