摘要
针对基于IEEE802.11的无线Mesh网络(WMN)在按多跳方式转发数据时存在带宽分配不公平的问题,提出一种改进算法DBAS。通过检测子节点包含的活动终端数量,计算分配指数并发送给子节点,使其能根据分配指数调整介质访问控制层的竞争窗口参数。在子节点向父节点发送数据时,采用加权轮询调度算法进一步保证带宽分配的公平性。NS2实验结果验证该算法的有效性。
Aiming at the unfair bandwidth allocation problem in Wireless Mesh Network(WMN) based on IEEE802.11 when transferring data through multi-hop, this paper proposes an improved bandwidth allocation algorithm Detection-based Adjustment and Schedule(DBAS). DBAS detects the active end node numbers of its child nodes to calculate the allocation indexes, and then sends them to its child nodes. A child node adjusts the size of contention window of Media Access Control(MAC) level after receiving the allocation index. In addition, a modified round robin schedule algorithm is adopted when a node sends packets to its father node. NS2 experimental result verifies the effectiveness of the proposed algorithm.
出处
《计算机工程》
CAS
CSCD
2012年第15期66-69,共4页
Computer Engineering
基金
上海理工大学光电学院教师创新能力建设基金资助项目(GDCX-Y-1211)
关键词
多信道
无线MESH网络
带宽分配
公平性
调度算法
多跳
multi-channel
Wireless Mesh Network(WMN)
bandwidth allocation
fairness
schedule algorithm
multi-hop