Invention Grant
US07885240B2 Hybrid time division multiple access (TDMA)-carrier sense multiple access (CSMA) medium access control (MAC) for multi-hop ad hoc networks
有权
用于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）
- Patent Title: Hybrid time division multiple access (TDMA)-carrier sense multiple access (CSMA) medium access control (MAC) for multi-hop ad hoc networks
- Patent Title (中): 用于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）
-
Application No.: US11560113Application Date: 2006-11-15
-
Publication No.: US07885240B2Publication Date: 2011-02-08
- Inventor: Avinash Joshi , Manish Shukla, Sr.
- Applicant: Avinash Joshi , Manish Shukla, Sr.
- Applicant Address: US IL Schaumburg
- Assignee: Motorola, Inc.
- Current Assignee: Motorola, Inc.
- Current Assignee Address: US IL Schaumburg
- Agent Randi L. Karpinia
- Main IPC: H04W4/00
- IPC: H04W4/00
Abstract:
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 of the nodes in a multi-hop network can transmit a Highest Slot Number (HSN) field. Each time one of the Hello messages is received from a neighbor node, a given node can calculate variables based on the HSN field. The given node can use these variables to calculate a ratio of the first number to the second number. This ratio can be dynamically adjusted depending upon the traffic conditions observed by nodes within the multi-hop ad hoc network at any particular time to thereby change the relative percentages of the frame which are allocated for a TDMA portion and a CSMA portion of the frame.
Public/Granted literature
Information query
