快速IP切换在无线局域网中的实现

【摘要】 在移动网络中,无缝切换是提供QoS的基础,也是支持实时业务应用(如视频点播和语音传输等)的保证。针对无线局域网(WLAN)的节点切换问题,建立了各种网络模型,提出了链路层、网络层和传输层的解决方案。文章根据切换过程的技术特征,研究了WLAN中网络层切换的各种方案,包括移动IP方案、TAP-DANCE方案以及网络辅助的IP移动支持,具体分析了上述方案的实现过程,比较了性能指标,指出了存在的问题及进一步研究方向。更多还原

【Abstract】 Seamless handoff is the foundation of Qos in wireless network, and gua ranteeing IP connectivity is one of the most critical issues for delay sensitive WLAN multimedia and communication applications. People present various solution s to the problem of handoff in IEEE 802.11 wireless LANs (WLANs), including link layer handoff, network layer handoff and transport layer handoff. According to the characteristics of the handoff process, this paper analyzes three network ha ndoff techniques: Mobile IP, TAP-DANCE and Network assisted IP mobility support. We have discussed their implementing processes, and have compared their perform ances, and have pointed out the existed problems as well as the directions for f urther study.更多还原