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的连接。在这种情况下，固定带宽分配方案已成功地用于同一小区内的多用户复用，同时提供对多用户干扰的保护。然而，未来的无线网络将需要适应本质上是突发的和产生可变比特率流量的多媒体源。该项目的目标是开发联盟（允许通过合作和节能改善网络访问），这是一种适用于突发源的无线网络的高吞吐量介质访问方案。无线网络被看作是一个空间分布的天线，天线单元通过不可靠的无线信道连接。当发生碰撞时，涉及碰撞的报文将被保存在缓冲区中。在碰撞后的插槽中，一组被指定为中继的节点组成联盟，并反射它们在碰撞插槽中接收到的信号。目的节点通过对原始碰撞报文和中继转发的信号进行处理，恢复原始报文。通过合作中继引入的空间分集使人们能够有效地处理无线信道，而无需任何带宽扩展或额外的天线硬件。ALLIANCES保留了ALOHA系统的优点，即所有节点都可以有效地共享对媒体资源的访问，而无需额外的调度开销，并且可以有效地使用网络功率。由于无线通信在当今社会的重要性，任何提高吞吐量和节约能源的努力都是值得的。

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.