Error Management in Wireless Networks

第三代个人通信系统可能涉及许多突发的、移动的、多媒体用户，这些用户的服务质量需求可能随时间动态变化。 为了使无线系统充分响应这些需求，有必要确定在无线电环境中分配QoS需求的基本机制。 与光纤链路不同，无线电链路可能价格昂贵，质量较差。因此，大部分服务质量仲裁将必须通过编码和其他链路增强技术来支持。 在这个建议中，我们首先提出的调查结果，揭示了高阶误差统计的重要性，在评估特定形式的错误控制高层服务的影响。 然后，我们注意到，当在分层堆栈上进行通信时，特定的错误控制模块不仅通过其自身的纠错能力，而且还通过它传递到更高层的错误事件的类型，对整体端到端性能施加影响。 因此，我们建议调查的错误管理机制，不仅纠正错误，而且形状和可能利用的统计数据的残余错误逃逸到更高层。 最后，给定一组最终用户性能要求，可以设想多种分配差错控制功能的方式。 因此，我们建议研究如何分配错误控制功能。 我们希望，拟议的工作将有助于设计新一代的网络无线电。

Third generation personal communication systems are likely to involve many bursty, mobile, multi-media users whose quality of service needs may vary dynamically over time. In order for a wireless system to respond adequately to these demands it will be necessary to determine fundamental mechanisms for allocating QoS needs in the radio environment. Unlike fiber optic links, radio links are likely to be expensive and of poorer quality. Thus, a large part of the quality of service arbitration will have to be supported via coding and other link enhancements techniques. In this proposal, we first present findings that reveal the importance of higher order error statistics in assessing the impact of particular forms of error control on higher layer services. Then we note that when communications are conducted over a layered stack, a particular error control module exerts influence on the overall end to end performance not only via its own error correcting capabilities but also via the type of error events that it passes up to the higher layers. Therefore, we propose to investigate error management mechanisms that not only correct errors but also shape and possibly exploit the statistics of the residual errors that escape to the higher layers. Finally, given a set of end user performance requirements, one can conceive of multiple ways of distributing the error control functions. So, we propose to investigate how to distribute the error control functions. We expect that the proposed work will help in the design of a new generation of network radios.