Min-Te Sun, Lifei Huang, Shao-Cheng Wang, A. Arora, T. Lai
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引用次数: 264
摘要
组播/广播是网络中重要的服务原语。IEEE 802.11组播/广播协议基于CSMA/CA (Carrier Sense Multiple access with Collision Avoidance)的基本接入流程。该协议不提供任何对多播/广播帧的媒体访问控制(MAC)层恢复。因此,由于干扰或碰撞导致的丢失帧的可能性增加,因此降低了组播/广播业务的可靠性。在本文中,我们提出了一种可靠的批处理模式组播MAC协议BMMM,它大大减少了争用阶段的数量,从而大大减少了组播/广播所需的时间。然后,我们提出了一种位置感知多播MAC协议LAMM,它利用站点位置信息来进一步改进BMMM。大量的分析和仿真结果验证了多播MAC协议的可靠性和有效性。
Reliable MAC layer multicast in IEEE 802.11 wireless networks
Multicast/broadcast is an important service primitive in networks. The IEEE 802.11 multicast/broadcast protocol is based on the basic access procedure of Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA). This protocol does not provide any media access control (MAC) layer recovery on multicast/broadcast frames. As a result, the reliability of the multicast/broadcast service is reduced due to the increased probability of lost frames resulting from interference or collisions. In this paper, we propose a reliable Batch Mode Multicast MAC protocol, BMMM, which substentially reduces the number of contention phases, thus considerably reduces the time required for a multicast/broadcast. We then propose a Location Aware Multicast MAC protocol, LAMM, that uses station location information to further improve upon BMMM. Extensive analysis and simulation results validate the reliability and efficiency of our multicast MAC protocols.