Abstract
In the wireless sensor network, energy supply and consumption is the main factors to affect survival time. Introducing the three-dimensional probability CSMA protocol, the paper analyses the system throughput, system delay and energy efficiency with using the average cycle analysis methods. For this protocol, the system time is slotted into a time slot with high channel utilization realized by the choice of three parameters P1, P2 and P3. The correctness of the theory is verified through the simulation.
Highlights
Wireless sensor networks (Wireless SensorNetworks, WSN) are deployed in the detection zone through a lot with network nodes which have the wireless communication and computing capabilities
Efficient MAC layer protocol is a hot topic for the Ad-hoc networks; the most common MAC layer protocol is carrier sense multiple access (CSMA) and a variety of other mechanisms
Assume that: a) The channel is ideal with no noise and interference; b) The basic unit of the system control clock is a, the information packets arrived at time a will transmit at the starting time of the slot; c) The channel propagation delay is a, the packet length is unit length and is an integral multiple of a ; d) The arrival process of the channel satisfy the Poisson process whose independent parameter is G, each arrival process on the channel is independent of each othere) The P is the probability of the discrete timeslot P-detection CSMA protocol which is proposed by Dongfeng Zhao professor; f) The packet length is 1. g) a 0.01
Summary
WSN) are deployed in the detection zone through a lot with network nodes which have the wireless communication and computing capabilities. Between the nodes of a wireless sensor network is a short distance; the general multi-hop wireless communication. Wireless sensor nodes in the network are widely distributed at a larger number, which cannot rely on supplemental batteries as an energy source. The energy supply has become a major factor affecting network effective survival time and overall network performance. How in the existing energy supply conditions, without affecting system functionality premise, as far as possible to reduce energy consumption, save battery power, maximizing network lifetime wireless sensor networks has become the core issue. Since each node sends a packet random, in order to reduce collisions, the MAC layer protocol necessary to establish a shared channel access mechanism. Efficient MAC layer protocol is a hot topic for the Ad-hoc networks; the most common MAC layer protocol is carrier sense multiple access (CSMA) and a variety of other mechanisms
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