NeTS-NR: ALLow Improved Access in the Network via Cooperation and Energy Savings (ALLIANCES)

传统的无线蜂窝网络支持语音或其他恒定比特率连接。在这些条件下，固定带宽分配方案已被成功地用于在同一小区中多路复用多个用户，同时提供针对多用户干扰的保护。然而，未来的无线网络将需要适应突发性质的多媒体源，并产生可变比特率的流量。该项目的目标是开发联盟(允许通过协作和节能改善网络接入)，这是一种适用于突发信号源的无线网络的高吞吐量介质接入方案。无线网络被视为空间分布的天线，天线单元通过不可靠的无线信道链接。当发生冲突时，冲突中涉及的分组被保存在缓冲区中。在冲突后的时隙中，一组被指定为中继器的节点组成联盟，并根据它们在冲突时隙期间接收到的信号进行反弹。目的节点通过处理原始冲突的分组和中继器转发的信号，可以恢复原始分组。通过协作中继引入的空间分集使人们能够有效地处理无线信道，而不需要任何带宽扩展或额外的天线硬件。联盟保持了ALOHA系统的好处，因为所有节点都高效地共享对媒体资源的访问，而不需要额外的调度开销，并能够有效地使用网络功率。由于无线通信在当今社会的重要性，在吞吐量和节能方面的任何改进都是值得努力的。

Traditional wireless cellular networks support voice or other constant-bit-rate connections. Under these conditions, fixed bandwidth allocation schemes have been successfully used to multiplex multiple users in the same cell while providing protection from multi-user interference. However, future wireless networks will need to accommodate multimedia sources that are bursty in nature and generate variable-bit-rate traffic. The goal of this project is to develop ALLIANCES (ALLow Improved Access in the Network via Cooperation and Energy Savings), a high-throughput medium access scheme for wireless networks that is suitable for bursty sources. The wireless network is viewed as a spatially distributed antenna, with antenna elements linked via the unreliable wireless channel. When there is a collision, the packets involved in the collision are saved in a buffer. In the slots following the collision, a set of nodes, designated as relays, form an alliance and bounce off the signal that they received during the collision slot. By processing the originally collided packets and the signals forwarded by the relays, the destination node can recover the original packets. The spatial diversity introduced via the cooperative relaying enables one to effectively deal with the wireless channel without any bandwidth expansion or additional antenna hardware. ALLIANCES maintains the benefits of ALOHA systems in the sense that all nodes share access to media resources efficiently and without extra scheduling overhead, and enables efficient use of network power. Due to the importance of wireless communication in today's society, any improvement in throughput and energy savings is a worthwhile endeavor.