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首页> 外文期刊>Wireless personal communications: An Internaional Journal >Performance Analysis of Different Channel Allocation Schemes of Random Access (RA) MAC Protocol with Back-Off Algorithm (BOA)
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Performance Analysis of Different Channel Allocation Schemes of Random Access (RA) MAC Protocol with Back-Off Algorithm (BOA)

机译：返回算法（BOA）随机接入（RA）MAC协议不同信道分配方案的性能分析

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Cognitive radio technology is an effective method to improve the utilization and efficiency of radio spectrum. Cognitive radio technology solves spectrum scarcity problem by allowing cognitive users to use spectrum holes when primary users are absent. Cognitive radio networks are classified according to the infrastructure into: (A) centralized cognitive radio networks and (B) cognitive radio ad-hoc networks. The cognitive media access control (MAC) protocols are the master key of designing cognitive radio network. These allow cognitive users to identify and use the available frequency spectrum in a manner constrains the levels of interference to the primary users. Cognitive radio MAC protocols can be classified into: (A) random access control protocol (B) time slotted control protocols (C) hybrid protocols. In this paper, the dynamic open spectrum sharing (DOSS) MAC protocol is proposed as an example for random access control protocol. Due to the collision among users, the network throughput will be reduced. In order to enhance the performance of DOSS protocol, a back-off algorithm (BOA) will be executed and analyzed to enhance the network throughput. An optimum number of data retransmissions that decrease blocking and dropping ratio are investigated. Moreover, two accessing channels techniques for the proposed algorithm will be presented: fixed channel allocation (FCA) and dynamic channel allocation (DCA) schemes. DCA scheme allows to users to choose the control channel in a dynamic manner. The dynamic behavior decreases the limitation of control channel saturation. So, it can increase the network throughput. The performance analysis of the FCA and DCA schemes for the proposed protocol will be simulated. Finally, the performance analysis of DCA scheme of DOSS mac protocol with BOA will be investigated.
机译：认知无线电技术是提高无线电谱利用率和效率的有效方法。认知无线电技术通过允许认知用户在不存在时使用频谱孔来解决光谱稀缺问题。认知无线电网络根据基础设施分类为：（a）集中认知无线电网络和（b）认知无线电ad-hoc网络。认知媒体访问控制（MAC）协议是设计认知无线电网络的主密钥。这些允许认知用户以一种方式识别和使用可用频谱来限制对主用户的干扰水平。认知无线电MAC协议可以分类为：（a）随机访问控制协议（b）时隙控制协议（c）混合协议。在本文中，提出了动态开放频谱共享（DOSS）MAC协议作为随机访问控制协议的示例。由于用户之间的碰撞，将减少网络吞吐量。为了提高DOSS协议的性能，将执行并分析回退算法（BOA）以增强网络吞吐量。研究了降低阻塞和滴加比率的最佳数据重传次数。此外，将提出两个访问该算法的通道技术：固定信道分配（FCA）和动态信道分配（DCA）方案。 DCA方案允许用户以动态方式选择控制信道。动态行为降低了控制信道饱和度的限制。因此，它可以增加网络吞吐量。将模拟拟议协议的FCA和DCA方案的性能分析。最后，研究了与蟒蛇DCA方案的绩效分析。

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