- Title
- Advanced resource allocation techniques for very high data multimedia traffic over IEEE802.11ac wireless networks
- Creator
- Nosheen, Summera
- Relation
- University of Newcastle Research Higher Degree Thesis
- Resource Type
- thesis
- Date
- 2021
- Description
- Research Doctorate - Doctor of Philosophy (PhD)
- Description
- VHT (very high throughput) multimedia applications are bandwidth-intensive services that require high transmission capacities and reduced channel processing times. The introduction of high-quality multimedia content, and the ever-increasing throughput rates it requires, has increased the demands for next-generation wireless networks. 5G technology provides revolutionary advancements in wireless local area network services by offering extremely high throughput rates, reduced end-to-end delay, and other QoS support for wireless connections. IEEE802.11ac is one of the advanced wireless standards incorporated under the 5G technology, and it boosts network throughput as well as spectrum efficiency. However, allocating transmission capacities in random access networks is a difficult challenge due to the traditional backoff procedure of the 802.11 MAC (medium access control) protocol. The provision of QoS (quality of service) assurance for VHT multimedia applications is anticipated to prevail. This leads to new research opportunities for developing advanced scheduling techniques in random access networks. The thesis defines, develops, implements and analyses advanced resource allocation techniques that exploit the advanced features of the 802.11ac standard to improve the QoS and QoE (quality of experience) of network users. Novel packet transmission algorithms referred to as ``Proportional Opportunity based Packet Transmission Technique (POBPS) are proposed that analyse the congestion state of bandwidth-intensive data users and adjusts the transmission bandwidth to improve network performance. The thesis then develops two new algorithms, namely the Flow Rate Adaptive Transmission Opportunity (FRA-TXOP) and Enhanced Access Scheduler (EAS). These algorithms solve the network congestion problems and allocate appropriate transmission capacities to resource-constrained video terminals to guarantee QoS provision. The EAS algorithm was developed to distribute equitable channel access among different multimedia flows. The proposed resource management techniques are extended to improve system performance and data transmission in multi-user and multi-traffic network architecture. The proposed algorithm, referred to as Flow Rate Adaptive Transmission Opportunity Extended (FRA-TXOPE), adaptively shares the transmission bandwidth among primary and secondary flows by examining the experienced congestion and QoS levels. Comprehensive performance evaluations are implemented to gain insights into the promising intrinsic benefits associated with QoS and fairness aware techniques under realistic scenarios. Simulation results and analyses indicate that the advanced network scheduling algorithms offer high QoS levels, improved end-user perception quality, and better channel utilisation compared to default and referenced algorithms.
- Subject
- very high data multimedia traffic sources; wireless networks; IEEE802.11ac; quality of service; quality of experience
- Identifier
- http://hdl.handle.net/1959.13/1510725
- Identifier
- uon:56445
- Rights
- Copyright 2021 Summera Nosheen
- Language
- eng
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| View Details Download | ATTACHMENT01 | Thesis | 9 MB | Adobe Acrobat PDF | View Details Download | ||
| View Details Download | ATTACHMENT02 | Abstract | 97 KB | Adobe Acrobat PDF | View Details Download |