• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Wireless Networks >Cooperative and fair MAC protocols for cognitive radio ad-hoc networks
【24h】

Cooperative and fair MAC protocols for cognitive radio ad-hoc networks

机译：认知无线电自组织网络的合作和公平MAC协议

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A secondary user (SU) in multichannel cognitive radio ad hoc network (CRAHN) has a limited transmission range, which may raise a hidden multichannel sensing problem. In addition, CRAHNs can be deployed ubiquitously, and SUs from any CRAHNs could co-exist utilizing the spectrum. This situation leads to the fairness issue of spectrum resource sharing between the SUs. Both cooperative and fairness issues are important to CRAHN performance. In this paper, a cooperative and a non-cooperative multichannel (MC)-MAC protocol is proposed. In order to address the fairness issue, a fair multichannel (FMC)-MAC protocol for CRAHN is proposed, which orientates to the fairness in resource sharing. In this FMC-MAC, the SU keeps the current backoff (CB) counter when a PU appears to claim the intended channel. These proposed MAC protocols are simulated using NS2 and compared with other protocols. In addition, a mathematical model using Markov chain is constructed for FMC-MAC and the performance measures are derived. From results, the MC-MAC protocol has enhanced the network utilization and the cooperative scheme has significantly enhanced the packet delivery ratio and decreased the end-to-end delay of SUs in high traffic. The cooperative protocol enhances packet delivery ratio up to 15 % and decreases end-to-end delay down to 32 %, compared to the non-cooperative one. The FMC-MAC protocol with other two existing protocols. From the comparison results, a higher fairness has been shown by FMC-MAC CB while still maintaining a high throughput.
机译：多通道认知无线电自组织网络（CRAHN）中的辅助用户（SU）具有有限的传输范围，这可能会引起隐藏的多通道传感问题。此外，CRAHN可以无处不在地部署，任何CRAHN的SU都可以利用频谱共存。这种情况导致了SU之间频谱资源共享的公平性问题。合作和公平问题对于CRAHN的表现都很重要。本文提出了一种合作和非合作的多通道（MC）-MAC协议。为了解决公平问题，提出了一种针对CRAHN的公平多信道（FMC）-MAC协议，该协议针对资源共享的公平性。在此FMC-MAC中，当PU似乎要求拥有预期的信道时，SU会保留当前退避（CB）计数器。这些建议的MAC协议使用NS2进行了仿真，并与其他协议进行了比较。此外，针对FMC-MAC建立了使用马尔可夫链的数学模型，并推导了性能指标。结果表明，MC-MAC协议提高了网络利用率，协作方案显着提高了高业务量中SU的分组传输率并降低了端到端延迟。与非合作协议相比，合作协议可将数据包传送率提高多达15％，并将端到端延迟降低至32％。 FMC-MAC协议与其他两个现有协议。根据比较结果，FMC-MAC CB显示出更高的公平性，同时仍保持了高吞吐量。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号