A realization method of high-dynamic self-organizing network efficient tdma protocol
A technology of self-organizing network and implementation method, applied in the field of realizing high-dynamic self-organizing network efficient TDMA protocol, can solve problems such as large overhead, data transmission needs, multiple time slots, etc., to avoid conflicts, improve real-time performance, and achieve consistency sexual effect
Inactive Publication Date: 2014-10-01
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology
Since the order of time slots occupied by nodes in each round is random, the order of time slots occupied by nodes is inconsistent with the transmission order of data packets at each node, often resulting in more time slots required for data transmission.
In addition, regardless of the centralized or distributed improved TDMA, its overhead is too large
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[0018] The method of the invention divides the time frame into leading time slots, allocation time slots and interruption time slots. The leading time slots of each time frame can be distributed and dynamically adjusted for time slot allocation, which improves channel utilization and throughput. In the leading time slot, the source node applies for a dedicated virtual link or a public virtual link according to the priority of the data flow to be sent. The dedicated link is only used for data transmission via this path, and the public link is shared by low-priority data. , which reduces the transmission delay of high-priority data and further improves the channel utilization. In the assigned time slot, each node sends data in the assigned time slot of its own link, which avoids the conflict caused by the nodes competing for the channel. This protocol also designs interrupt time slots, in which nodes can compete for channels in order to deal with emergencies. The invention red...
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The invention discloses a method for realizing high-efficiency TDMA protocol in a highly dynamic self-organizing network, which divides a time frame into leading time slots, allocation time slots and interruption time slots. In the leading time slot, the source node applies for a dedicated virtual link or a public virtual link according to the priority of the data flow to be sent. The dedicated link is only used for data transmission via this path, and the public link is shared by low-priority data. , which reduces the transmission delay of high-priority data and further improves the channel utilization. In the assigned time slot, each node sends data in the assigned time slot of its own link, which avoids the conflict caused by the nodes competing for the channel. This protocol also designs interrupt time slots, in which nodes can compete for channels in order to deal with emergencies. The invention reduces communication time delay, improves channel utilization rate and throughput, has high reliability, and is suitable for highly dynamic self-organizing network.
Description
technical field [0001] The invention belongs to the technical field of wireless ad hoc networks, in particular to a method for realizing high-efficiency TDMA protocols of highly dynamic ad hoc networks. Background technique [0002] A highly dynamic ad hoc network is an ad hoc network composed of high-speed moving communication nodes, including vehicle-mounted mobile nodes, UAV nodes, etc. High dynamic self-organizing network has the characteristics of long transmission distance, fast moving speed, frequent topology changes, and high link disconnection rate. [0003] CSMA / CA is the most widely used MAC protocol in wireless ad-hoc networks. CSMA / CA implements channel multiplexing through monitoring channels and random back-off mechanisms, and alleviates the problem of hidden terminals through RTS-CTS signals. The network overhead is small, but CSMA / CA cannot guarantee the time determinism and real-time performance of data transmission, nor can it provide service differentiat...
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IPC IPC(8): H04W72/04H04W74/04H04W84/18H04W80/00
Inventor 张可张伟曾庆瑾王泽阳唐道平
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA