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LTE关于广域网的宽带无线接入的架构设计大致是:支持1.25MHz～20MHz带宽;支持下行100Mb/s、上行50Mb/s的峰值速率;能为15km/h～120km/h的移动用户提供高性能的服务,可以支持120km/h～350km/h的移动用户。这一美好的宽带无线通信图景,必然要求涵盖广阔优质的网络覆盖,提供无缝、无干扰甚至无时延的信息传递和交互能力等,即须考虑克服线路冗余、媒体成本、带宽利用和差错处理、不同网络和系统间的切换和兼容等设计和操作因素。LTE如何在“自适应”和“高效益”间取得平衡?LTE是否能实现短期内的顺利演进?诸多局域网、城域网、广域网技术会形成怎样的竞争和互补格局?本期热点争鸣试图对上述问题展开探讨。
LTE Broadband wireless access on the WAN architecture design is roughly: support 1.25MHz ~ 20MHz bandwidth; support downlink 100Mb / s, upstream 50Mb / s peak rate; for 15km / h ~ 120km / h mobile users to provide high performance Service that can support 120km / h ~ 350km / h mobile subscribers. This beautiful landscape of broadband wireless communications necessarily entails covering a wide range of high quality network coverage and providing seamless, non-disruptive and even time-delay information transfer and interaction capabilities that must be considered to overcome line redundancy, media costs, bandwidth utilization and Error handling, switching and compatibility between different networks and systems, and other design and operating factors. How to balance LTE between “adaptive” and “high efficiency”? Can LTE achieve a smooth evolution within a short period of time? How will competition between LANs, MANs and WANs be formed? Hot contention attempts to explore these issues.