This paper firstly introduce Wimax standard specifications, then focus on the description of sleep mode operation and performance analysis of sleep mode key parameters, at last give some improved idea .My work is described as follows:1. This paper characterizes the standardized chi flat iron sleep mode in IEEE802.16e and gives a model based on the hyper-Erlang for an extensive analysis of the energy consumption and packet delay. Through the simulation we can see the polo shirts performance of the energy consumption and packet delay. At last we study the impact of key parameters on the performance. 2. This paper firstly gives an analysis of energy consumption and delay performance about two men's nike shoes modes. Then we give a sleep mode selection algorithm to meet the requirement of energy consumption and delay performance by using the Markov Decision Processes. We highlight the trade-offs between energy consumption and delay performance among different operational modes. Through the simulation we can see the performance of this selection algorithm.3. This paper proposes women's nike shoes an improved sleep mode control algorithm, which adjusts adaptively the sleep mode interval according to the traffic rate. Then we compare the 802.16e standard algorithm and the improved algorithm under four actual models. It has been observed that our proposed algorithm for sleep mode saves substantial chi flat ironamount of energy at lower traffic and almost same at higher traffic as compared to 802.16e.4. This paper analyzes the power consumption and the delay of IEEE802.16e sleep mode operation with a theoretical Markov chain model. The analytical results show that there is a tradeoff between the power consumption and the delay, and the key of the tradeoff is the initial sleep window. Then we present an adaptive algorithm to adjust the initial sleep window dynamically according to the traffic load. Through the simulation we can see the proposed algorithm can improve the power consumption up to 20% compared to the IEEE802.16e standard, the price is just little increase of the delay.5. This paper characterizes the standardized sleep mode in IEEE802.16e, and then we give an improved mechanism based on variable sleep interval power and compare with the standard mechanism under four actual models. Through the simulation we can see the performance of the improved mechanism is better than the standard mechanism in power saving, at last we study the impact of key parameters on the improved mechanism performance.
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