الفهرس 
Chapter 1 IntroductionOnly 14 pages are availabe for public view
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Abstract
Radio technologies have evidenced a rapid and multidirectional evolution with the launch of the analogue cellular systems in 1980s. Thereafter, digital wireless communication systems are consistently on a mission to fulfil the growing need of human beings (1G,….4G, or now 5G). Fifth Generation (5G) is a new network system that has much higher speeds and capacity, and much lower latency, than existing cellular systems. One of the emerging technology that beyond to (5G) technology is Machine to Machine (M2M).
M2M refers to the technology that allows the devices to communicate autonomously with other devices over the wired or wireless systems. It can be used in many fields including industrial, agriculture, health care, and transportation system.
Neither the contention based Medium Access Control (MAC) protocols nor the reservation based MAC protocols can provide a flexible, scalable solution for M2M networks that contain a large number of the devices.
In this thesis, a proposed hybrid MAC protocols for M2M network will be suggested which combine the main features of two different protocols. It composes of three main parts: Notification Period (NP), Contention Only Period (COP), and Transmission Only Period (TOP). Different devices contend on transmission opportunities based on Non-persistent Carrier Sense Multiple Access (NP-CSMA) mechanism during the contention period in order to obtain a time slot based on Time Division Multiple Access (TDMA) technique during the transmission period. The proposed protocol donates a higher throughput, lower average delay time, and a lower packet collision ratio in comparison with other conventional MAC protocols.
At the first topic in this research, Different devices contend on the transmission opportunities with the same contending probability during the Contention Period based on NP-CSMA mechanism. During the transmission period, only the successful devices willAbstract _
reserve a time slots to transmit its data packet based on TDMA reservation based mechanism. Moreover, the proposed protocol performance can be measured in terms of three metrics: throughput, average delay time, and Packet Delivery Ratio. Extensive MATLAB programs are developed to present a comparison between the Proposed Protocol with other conventional protocols. Also, studying the effect of changing the contention period in two cases loaded and unloaded systems. Extensive MATLAB programs are done to show the impact of varying the contention period on the throughput, average delay time, and packet collision ratio.
Secondly, an efficient one packet per user proposed MAC protocol for M2M networks will be presented. The active devices (that have data packets to send) can contend on the transmission opportunities during the contention period based on NP-CSMA mechanism to transmit only one data packet in a single time slot during the transmission period based on TDMA type of transmission. If the device successfully contends the transmission, a time slot has been reserved only once for that device to transmit only one data packet. The performance of the protocol can be measured in terms of the previous three parameters.
Finally, an efficient multiuser per slot reservation MAC Protocol for M2M networks. Different devices contend on the transmission opportunities with the same contending probability during the Contention Period based on Non-persistent Carrier Sense Multiple Access (NP-CSMA) mechanism. During the transmission period, only the successful devices will reserve a time slots to transmit its data packets based on Time Division Multiple Access (TDMA) reservation based mechanism. If a successfully contending device finds that all the time slots are busy, a signal to interference plus noise ratio (SINR) comparisons with the devices that has SINR in the first time slot will be made. Comparisons between the old devices SINR and new devices with signal to interference plus noise ratio threshold (SINRTH) will be done.