发明授权
US08320321B2 Optimizing positions of time slots in a hybrid time division multiple access (TDMA)-carrier sense multiple access (CSMA) medium access control (MAC) for multi-hop ad hoc networks
有权
在多跳自组织网络的混合时分多址（TDMA）载波多址接入（CSMA）媒体接入控制（MAC）中优化时隙的位置
- 专利标题： Optimizing positions of time slots in a hybrid time division multiple access (TDMA)-carrier sense multiple access (CSMA) medium access control (MAC) for multi-hop ad hoc networks
- 专利标题（中）： 在多跳自组织网络的混合时分多址（TDMA）载波多址接入（CSMA）媒体接入控制（MAC）中优化时隙的位置
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申请号： US11767171申请日： 2007-06-22
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公开(公告)号： US08320321B2公开(公告)日： 2012-11-27
- 发明人: Avinash Joshi , Manish Shukla
- 申请人： Avinash Joshi , Manish Shukla
- 申请人地址： US IL Schaumburg
- 专利权人： Motorola Solutions, Inc.
- 当前专利权人： Motorola Solutions, Inc.
- 当前专利权人地址： US IL Schaumburg
- 代理商 Randi L. Karpinia
- 主分类号： H04W4/00
- IPC分类号： H04W4/00
摘要：
A hybrid TDMA-CSMA MAC protocol is provided for allocating time slots within a frame having a structure in which transmission time is divided into a first number of actual TDMA time slots and a second number of “virtual” CSMA time slots. Each time a given node receives a Hello message, it can calculate variables based on an HSN field. A ratio of the first number to the second number can be dynamically adjusted depending upon the traffic conditions. When TDMA time slots within the frame are freed (e.g., no longer being used), slot position optimization techniques are provided for moving these freed TDMA time slots back into the CSMA portion of the frame and reallocating or moving other TDMA time slots into the portion of the frame that was previously occupied by the freed TDMA time slots to thereby maximize resource utilization.
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