Method for realizing MAC (Media Access Control) protocol under long delay condition of underwater sound sensor network

An underwater acoustic sensor and protocol implementation technology, applied in the direction of error prevention/detection, electrical components, wireless communication, etc. using return channels, can solve the problems of reducing network throughput, increasing end-to-end delay, wasting time slots, etc. The effects of improved utilization and network throughput, lower end-to-end latency, better realizability
CN102195763BInactive Publication Date: 2013-05-08SOUTHEAST UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTHEAST UNIV
Publication Date
2013-05-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for realizing an MAC (Media Access Control) protocol under the long delay condition of an underwater sound sensor network. In the method, time is divided according to a time slot in a half-duplex communication mode based on a TDMA (Time Division Multiple Access) mechanism. According to the long propagation time delay characteristic of underwater sound communication and the space reusability of a channel, a node is allowed to transmit data to a node waiting for an answer acknowledgement frame, idle nodes in surrounding nodes are allowed to transmit data, and any node waiting for the answer acknowledgement frame is allowed to receive data. Due to the adoption of the method, the aim of making one node communicate with a plurality of nodes synchronously is fulfilled, the network throughput is increased, and meanwhile, the end-to-end delay of the network is lowered; and the method is suitable for the underwater sound sensor network and other long-propagation-time-delay communication networks, and has a higher practical application value.
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Description

technical field

[0001] The invention relates to a method for realizing a MAC layer protocol of an underwater acoustic sensor network based on CSMA / CA and TDMA, and belongs to the technical field of underwater acoustic signal processing. Background technique

[0002] TDMA (Time Division Multiple Access) divides time into periodic frames, and each frame is divided into several time slots for sending signals. Under the conditions of timing and synchronization, the base station sends to The signals of multiple mobile terminals are arranged to be transmitted in predetermined time slots in order, and each mobile terminal can distinguish and receive the signal sent to it in the combined signal as long as it receives in the designated time slot.

[0003] Network throughput and end-to-end delay are the basic technical indicators that reflect network performance. When the traditional TDMA MAC protocol has a low network load, some nodes may have no data to send during their time slots,...

Claims

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