Method for underwater acoustic sensor network Aloha protocol

An underwater acoustic sensor and network technology, applied in wireless network protocols, network topologies, transmission systems, etc., can solve the problems of ignoring channel propagation delay, wasting network resources, and increasing data collisions.

Inactive Publication Date: 2011-03-02
SOUTHEAST UNIV
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Problems solved by technology

Due to the large propagation delay of the underwater acoustic channel, this implementation method will cause interference between data and increase the probability of data collision. At the same time, in the case of underwater acoustic network communication with large propagation delay, a network node only needs to Can establish a connection with a node, thus wasting limited network resources and reducing network performance
The reason for this is that the propagation delay of the channel is neglected

Method used

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  • Method for underwater acoustic sensor network Aloha protocol
  • Method for underwater acoustic sensor network Aloha protocol
  • Method for underwater acoustic sensor network Aloha protocol

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Embodiment Construction

[0056] see figure 1 , before sending data, carry out channel detection, and carry out information transmission in the channel idle state, before confirming the arrival of information, use the long propagation delay of the underwater acoustic channel to monitor the information of other nodes, and use The backoff gap is used to monitor the channel, so that one node can communicate with multiple nodes at the same time without conflict; that is, when the network node A has data to send, it first listens to whether the channel is being occupied. If the channel is busy, the node does not send data and keeps It is in the listening state until the channel is free. When the channel is free, the network node will send the data. After sending, while waiting for the confirmation of the receiver node B, if it receives data from other network node C, it will first calculate the current relationship with the node C. The probability of successful communication, if the probability is not less ...

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Abstract

The invention relates to a method for an underwater acoustic sensor network Aloha protocol, which adopts a semiduplex communication mode and comprises the following steps: a node enters in the communication process after network initiation, channel monitoring is performed before data is transmitted, information transmission is performed when the channel is in an idle state, before confirmation information arrives, long propagation delay of an underwater acoustic channel is adopted to monitor information of other nodes, and channel monitoring is performed by adopting withdrawal gaps in the withdrawal process under a data conflict state, thus realizing conflict-free communication between one node and multiple nodes at the same time.

Description

technical field [0001] The invention relates to a sensor network Aloha protocol, in particular to an Aloha protocol method applied to an underwater acoustic sensor network. The invention belongs to the technical field of underwater acoustic signal processing. Background technique [0002] Network throughput, end-to-end delay, and energy consumption are the basic technical indicators that reflect network performance. The traditional Aloha protocol implementation method is that when a network node has data to send, it sends it directly to the channel, and only waits for reception after the data is sent. Party reply, do not process other events. If the data transmission is not successful without receiving the confirmation from the receiver, the network node enters the back-off state, does not process any events during the back-off period, waits for the back-off time to end, and then resends the data until the sending is successful. Due to the large propagation delay of the un...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B13/02H04L1/16H04W80/00H04W84/18
Inventor 高翔方世良李霞王毅罗昕炜
Owner SOUTHEAST UNIV
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