WiMAX和WiFi?垂直切换的无缝衔接
2014-07-13李少峰
摘要:随着网络的发展,下一代无线网络将包括数个重叠的层次,为移动用户提供不间断的通信是一个具有挑战性的任务。在WiMAX和位于同一基站WiFi的情况下,垂直切换延迟将会减少与两个传统的WiMAX、WiFi网络的异构性。然而,协议转换仍然是增加延迟和抖动之间数据交换所需的两种技术。在该文中,为了减少在协议转换中的延迟,提出了一个新的工业设计,在WiMax和WiFi中添加适配层,对这两个标准间互通的实现进行了讨论和评价。结果表明,具有比其他相关工作更好的性能。
关键词:WiFi;WiMAX;异构网络;无缝衔接
中图分类号:TP393 文献标识码:A 文章编号:1009-3044(2014)05-1096-02
The Seamless Connection of the Vertical Handover between the WiMAX and WiFi
LI Shao-feng
(Department of Computer Sciences, Yunyang Teachers College, Shiyan 442000, China)
Abstract: With the development of the network, the next generation of the wireless networks will consist of several overlapping tiers. Provision of undisrupted communication to mobile users is a challenging task. In the case of both the WiMAX and the WiFi technologies which are located at the same base station (BS), the vertical handover (VHO) delay will be less as compared with the two conventional WiMAX/WiFi heterogeneous networks with two different wireless Internet service providers. Nevertheless, protocol conversion is still adding delay and jitter for data exchange between the needed two technologies. In this paper, in order to reduce the delay in the protocol conversion, a new industrial design for WiWi (WiMAX and WiFi) adaptation layer is proposed. The realization of the interworking between these two standards is discussed and evaluated. The results show that the proposed scheme-with the scenario under study- has better performance than other related works.
Key words: WiFi; WiMAX; Heterogeneous Network; The seamless connection
高速互联网接入有线电视、数字用户线(DSL),和其他固定宽带连接到无线热点形成了无线网络,无线网络提高了人们生产力和方便。今天, 数以百万计的办公室、家庭、和公共场所,如酒店、咖啡馆、机场等都在提供几乎无处不在的无线网络。而无线网络接收器已集成到笔记本电脑、手机和消费电子产品等这些设备中。另一方面,WiMAX无线互联网接入到一个新的水平,并随着时间的推移,也可以实现类似的速率作为无线设备。WiMAX可以提供互联网接入最近的WiFi热点形成更大的覆盖面积,无论是都市、郊区或农村,都能每秒多兆比特移动宽带上网。虽然,广域网路连通性提供了3G蜂窝数据移动服务,这些服务为用户提供宽带速度和已经习惯WiMAX服务。在过去的几年中,已经建立了相关的WiMAX网络作为一种替代有线DSL和电缆,提供有竞争力的宽带服务,可以迅速部署和有效的降低成本。……
