Wireless communication has been the major part of the wireless industry that have grown very fast and captured the attention of many researchers. it has evolved from different generations and the current 3G Long Term Evolution (LTE) is the main focus in this project. LTE is an emerging and promising technology that aims at providing broadband ubiquitous Internet access and improving multimedia services. This is achieved through streamlining the system for packet services, since LTE is an all Internet Protocol (IP) based network. The fact that 3G LTE is a packet based network brings about some improvements in the form of higher bit rates, lower latencies, etc. However, several technical challenges are expected to arise when voice traffic is transmitted over LTE network. Voice transmission over 3G LTE has brought major concerns due to the fact that voice traffic, similar to any other real-time traffic, is affected by technical issues such as end-ta-end delay or latency, jitter, and packet loss which adversely affect the Quality of Service (QoS). This has led to the development of different scheduling and resource allocation schemes with the aim of improving the QoS of voice traffic when transmitted over a 3G LTE network. This research, studies how cross-layered scheduling and resource allocation techniques can improve the QoS of voice traffic when transmitted over 3G LTE network. This research proposes a novel cross-layer scheduling and resource allocation algorithm in order to improve the performance gains and QoS of voice when transmitted over a 3G LTE Network. The novelty of the proposed algorithm is that it projects the voice packet scheduling and resource allocation problem as a constrained optimization problem in contrast to the existing techniques. This optimization problem is formulated using the transmission rate and channel state information at the physical layer as well as the queuing state information such as the queue length at the Medium Access Control (MAC) layer. The a1gorithmic implementation of the obtained solution is provided and this research also investigates the performance, mobility, complexity, and fairness issues of the proposed cross-layer scheduling algorithm under different conditions such as, VoIP delay, packet loss, etc.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:601666 |
| Date | January 2014 |
| Creators | Musabe, Richard |
| Publisher | Glasgow Caledonian University |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
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