Hybrid MAC protocol method for cluster-structure multi-carrier acoustic sensor network

A technology of underwater acoustic sensors and sensor networks, which is applied in transmission systems, advanced technologies, electrical components, etc., can solve problems such as data transmission delays and increased competitive energy loss, inability to allocate resources, and large data transmission delays, etc., to reduce data transmission The effect of energy consumption

CN104796959AActive Publication Date: 2015-07-22SOUTHEAST UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2015-07-22

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Abstract

The invention discloses a hybrid MAC protocol method for a cluster-structure multi-carrier acoustic sensor network. The hybrid MAC protocol method comprises the following steps: fusing a scheduling type MAC protocol with a competitive type MAC protocol into a hybrid acoustic communication network MAC protocol, realizing MAC protocol dynamic switching for all nodes in the network by virtue of a global synchronization time, and classifying data with different attributes through a cross layer design thought and then transmitting. Two transmission modes of free burst IBT and active polling IPT are adopted, data messages transmitted in the two different transmission modes are periodic messages and burst messages respectively, IBT time slots and IPT time slots are alternately carried out, and the length of the free burst IBT time slots is dynamically adjustable, so that the needs of transmission for the various messages in the sensor network can be met, the communication energy consumption of the sensor network can be reduced simultaneously when the service quality of the network can be ensured.
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Description

technical field

[0001] The present invention relates to a media access control (Media Access Control, MAC) protocol at the data link layer of an underwater acoustic sensor network, in particular to a hybrid MAC protocol method for a cluster-structured multi-carrier underwater acoustic sensor network, belonging to the technical field of underwater acoustic signal processing . Background technique

[0002] The MAC layer protocol of the underwater acoustic sensor network needs to make full use of the characteristics of the physical layer channel under the premise of ensuring the network QoS (Quality of Service, quality of service) and comprehensively consider the needs of the upper layer application to reduce the communication energy consumption of the network as much as possible. The MAC protocol design of the underwater acoustic sensor network is data-oriented, and the design cannot fully refer to the layer division of the underwater acoustic communication network protocol ar...

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Embodiment Construction

[0057] see figure 1 , is a schematic diagram of the cluster structure underwater acoustic sensor network, where the dotted line represents the data link of China Unicom, the blank node represents the member node in the cluster, and the shaded node represents the cluster head node. It can be seen that its network structure is iterative, that is, data forwarding and aggregation between cluster head nodes is actually equivalent to higher-level intra-cluster communication. The present invention can be specifically implemented according to the following steps in the cluster structure underwater acoustic sensor network:

[0058] 1) Complete the clock synchronization of each node in the cluster structure underwater acoustic sensor network.

[0059] 2) The initial data transmission mode of the network is determined by the cluster head node. If it is the IBT mode, the duration of the mode is given at the same time; if it is the IPT mode, the sensor network will directly enter the IPT ...