MATS: multichannel time-spread scheduling in mobile ad hoc networks
MATS: multichannel time-spread scheduling in mobile ad hoc networks
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DOI：
10.1109/twc.2006.1611091
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发表时间：
2006-11
影响因子：
10.4
通讯作者：
X. Tian;Yuguang Fang;T. Ideguchi
中科院分区：
文献类型：
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作者：
X. Tian;Yuguang Fang;T. Ideguchi
无线移动自组网(MANET)在过去的几年里受到了极大的关注。为了简化网络的设计和分析，大多数研究工作都集中在单功率电平的单信道MANET上。如何在移动自组网中充分利用多信道、多功率级的优势，是一个具有挑战性的问题。近年来，一些多信道传输协议被提出，如冲突避免传输调度(CATS)，以获取在部署多个信道时的高传输效率的优势。虽然这些协议确实提供了协调使用多个信道的方法，但也存在一些严重的问题，如在高流量负载下吞吐量快速下降。在本文中，我们提出了一种新的协议，即多信道时间扩展调度(MATS)，试图解决这些问题。在MATS中，将有传输请求的节点分成三组，分别并行进行信道预留，并在链路层同时支持单播、组播和广播。MATS使用预留的信道确保成功和无冲突的数据传输，并允许组播和广播高于单播的高优先级。理论分析和大量的仿真研究表明，MATS在高流量负载下的性能明显优于已有的方案。
Wireless mobile ad hoc networks (MANETs) have received considerable attention in the last few years. Most research works focus on single-channel MANETs with a single power-level in order to simplify the network design and analysis. How to take advantage of multiple channels and multiple power levels in MANETs poses a serious challenging problem. Recently, a few multichannel transmission protocols such as collision-avoidance transmission scheduling (CATS) have been proposed to harvest the advantage of high transmission efficiency when multiple channels are deployed. Although such protocols do provide ways to coordinate the use of multiple channels, there exist some serious problems such as the throughput fast drop-off under heavy traffic loads. In this paper, we propose a new protocol, namely, multichannel time-spread scheduling (MATS), which attempts to tackle these problems. In MATS, nodes with transmission requests are divided into three groups, which carry out channel reservations in parallel and can simultaneously support unicasting, multicasting and broadcasting at the link level. MATS ensures successful and collision-free data transmissions using the reserved channels and allows multicasting and broadcasting high priorities over unicasting. Both theoretical analysis and extensive simulation studies are carried out which show that the performance of MATS under high traffic loads significantly outperforms the existing schemes.