الفهرس 
Chapter 1: IntroductionOnly 14 pages are availabe for public view
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Abstract
M2M communication is a form of data communication which enables machine nodes to exchange information and to carry out actions without the manual help of humans. Moreover, it is characterized by delay sensitive, small payload and little traffic per device.
Firstly, an optimized hybrid MAC protocol for M2M networks has been investigated which incorporating with Slotted ALOHA technique for reservation and TDMA strategy for
transmission. Where, each frame comprised two main processes: the contention process, and the transmission process. The devices only send contending requests with the same probability during the contention period (CP) and transmit data during the transmission period (TP). The maximum aggregate throughput can be easily obtained by controlling the duration of contention and transmission periods. Consequently, Monte Carlo simulation is applied as an optimization method to obtain the optimal length of contention (or transmission) period.
This thesis considers clustering design. Where, clustering is a technology for more efficient data gathering and higher network energy efficiency. Existing clustering designs in literature will be analyzed and two clustering designs for M2M communications in cellular networks will be proposed. Performance of these designs will be evaluated thoroughly using both analytical and simulation tools across many aspects, including energy consumption, dead device ratio, residual energy, and network life.
To save the cost of maintaining M2M systems in the long term, energy consumption needs to be minimized so that battery lives of M2M devices can be maximized, which motivates the design of MAC protocol in this thesis.
Finally, a hybrid energy-efficient MAC protocol for M2M communications will be presented. This solution not only improves existing protocols but also takes the advantage of clustering in cellular networks to save energy. from simulation results, it is shown that the proposed MAC protocol outperforms others in energy saving without sacrificing much on delay or throughput. This is because, with clustering, the transmission power of remote nodes can be greatly reduced after they become members of clusters. With the proposed MAC protocol, the lifetimes of both individual nodes and the whole M2M network are significantly extended.