Blending MAC protocol design method suitable for wireless sensor network

Abstract

The invention discloses a jamming perception self-adaption blending MAC protocol which is suitable for a wireless sensor network and belongs to the field of computer networking technology. In the low loading network situation, a node runs the CSMAMAC protocol at the normal working condition; when the network has burst data or detects the jamming nearby the node of a bottleneck, a TDMA mechanism is embedded in the jamming area in a self-adaption way; the node of the jamming area runs the local TDMAMA protocol; and after the jamming releases, the node recovers the normal working condition and runs the CSMAMAC protocol. The invention detects the jamming according to the local information and does not need any synchronization algorithm; according to the jamming degree, the local TDMA is embedded in the CSMA network in a self-adaption way so that performance indexes such as the throughout capacity, packet loss rate and time delay and the like are improved and the performance of the network is increased.

Description

technical field [0001] The invention relates to the technical field of computer networks, in particular to an adaptive congestion-aware hybrid MAC (Medium Access Control) protocol design method suitable for wireless sensor networks. Background technique [0002] Wireless Sensor Networks (WSNs) are composed of a large number of low-power, low-speed, low-cost, and high-density micro-nodes. The nodes form a network through self-organization and self-healing. The use of wireless sensor networks can realize data collection and quantification, processing and fusion, and transmission applications. By artificially or randomly deploying sensor nodes in specific areas, the information of the surrounding environment can be collected, transmitted, and aggregated in a self-organizing and collaborative sensing manner. This large-scale, low-cost, unattended, automatic networking without infrastructure, strong robustness and invulnerability network method has its advantages in many monitori...

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Problems solved by technology

[0010] 2. TDMA requires clock synchronization, and strict clock synchronization algorithms are too expensive on resource-constrained sensor nodes;

[0012] 4. The uncertainty of interference makes the interference distance of sensor nodes not equal to the communication distance, so the channel resource allocation that depends on the communication distance needs to be reconsidered;

[0013] 5. In a low-contention network, in TDMA, a node can only send data in its own time slot, so TDMA's performance parameters such as channel resource utilization and delay are better than "send immediately once the channel is obtained through competition" CSMA difference

[0014] Therefore, it is not practical to implement a single TDMA MAC protocol on resource-constrained sensor nodes

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