A method for energy saving of media access control layer of wireless mesh network

Abstract

The invention provides an energy-saving method for the medium access control layer in a wireless mesh network, in which all nodes in the network, on the premise of time synchronization, implementing a periodic synchronized awakening handshake operation; for a node requesting for data sending, a brief awakening tone is sent firstly to inform the destination node of the intention of data sending at the moment of awakening handshake, and then a channel access method based on a competition mechanism is used for sending data frames; for a node without data sending request, a brief channel monitoring is performed firstly in order to detect channel activities at the moment of awakening handshake, and if having sensed intention to send data from the node nearby, a receiving state is then kept in order to receive the upcoming data frames, otherwise, turning into sleep mode immediately; and the dynamically changing of load and the bursting flow are adapted by an adaptive awakening handshake mechanism, and the sensitivity of network performance to the setting of 'Awakening Handshake' cycle is reduced thereby. The invention enables all nodes in the network to carry out the on-demand awakening operation in a large extent with little cost, and therefore has a good energy-saving effect.

Description

technical field [0001] The invention belongs to the field of wireless network communication, in particular to an energy-saving method used in the communication process between adjacent nodes in a medium access (MAC) layer communication process in a wireless mesh (Mesh) network, and belongs to a MAC layer energy-saving mechanism. Background technique [0002] An important feature of the wireless Mesh network for industrial monitoring applications is that the nodes used for data collection and communication forwarding in the network are all kinds of field devices, their communication and storage capabilities are very limited, and due to the limitations of the application environment and cost, most Part of the nodes rely on battery power, so how to realize the energy-saving operation of nodes and the entire network, so as to prolong their working life is an important problem that needs to be solved urgently in the wireless Mesh network for industrial monitoring. [0003] The ex...

AI Technical Summary

Problems solved by technology

However, since the sleep / wake schedule is pre-set, such protocols cannot adapt well to dynamic network traffic changes.

For example, assuming that the sleep / wake schedule of node A is x / y, where x is the sleep time in a sleep / wake cycle and y is the wake-up time, then node A must wake up at time y in each cycle, even in this During a period of time, A actually has no data to send and receive, which will affect the energy saving effect

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