Research in Wireless Distributed Systems

该奖项是为购买无线电调制解调器和便携式 无线电网络研究用计算机 系统.研究将集中在以下几个方面： 无线通信，包括：扩展IP协议， 处理拓扑不固定的主机， 在没有数据的情况下从一个无线电小区切换到另一个无线电小区， 通信损耗，智能缓存，以减少峰值负载， 慢速无线电链路、自组织负载平衡和分布 内核功能。无线网络提供了一个有吸引力的 替代运行电缆之间和内部的费用， 只要不需要高通信速度，就可以在建筑物中使用。 这项研究旨在解决一些问题， 无线网络，并在哥伦比亚建立一个实验网络 大学 这是非常昂贵的运行电线或光纤电缆 建筑物之间和内部。布线的另一种选择是建立 无线计算机网络很像蜂窝电话网络， 电话线网络的替代方案。的问题 建立一个无线计算机网络比那些 参与建设无线语音网络。这些问题 包括当小区边界 是交叉的（与语音，一些噪音是可以接受的，与数据， 必须最小化），负载平衡方法，使缓慢的无线电链路 不要被阻塞，操作系统的分布 功能，以减少通信。设备由 这项拨款将使一个实验性的无线计算机网络， 兴建该网络将用于实验验证 通信协议，并验证负载算法 平衡和其他方法，以减少 网络

This award is for the purchase of radio modems and portable computers for research into radio network (wireless) computer systems. The research will concentrate on several aspects of wireless communication including: extending the IP protocol to handle hosts that are not topologically fixed, techniques for handing off from one radio cell to another without data or communications loss, intelligent caching to reduce peak loads over slow radio links, self-organizing load balancing, and distribution of kernel functionality. Wireless networks provide an attractive alternative to the expense of running cables between and within buildings so long as high communication speeds are not required. This research is intended to solve some of the problems with wireless networks and to build an experimental network at Columbia University. It is very expensive to run wires or fiber optic cables between and within buildings. An alternative to cabling is to build a wireless computer network much like the cellular phone network is an alternative to the telephone line network. The problems with building a wireless computer network are more complex than those involved in building a wireless voice network. These problems include protocols to "hand off" communications when cell boundaries are crossed (with voice, some noise is acceptable, with data this must be minimized), load balancing methods so that slow radio links don't get clogged, and distribution of operating system functionality to reduce communications. The equipment funded by this grant will enable an experimental wireless computer network to be built. The network will be used to experimentally validate communication protocols and to validate algorithms for load balancing and other methods needed to reduce communications on the network.