An enhanced mobile multicast routing scheme over wireless mesh networks /
It is highly challenging to deploy group multimedia applications that are bandwidth intensive and delay sensitive in a scenario of mobile source over Wireless Mesh Networks (WMN). This is due to unavailability of efficient network layer routing support in WMN architecture of IEEE 802.11s. This is be...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English |
| Published: |
Kuala Lumpur :
Kulliyyah of Engineering, Internationai Islamic University Malaysia,
2015
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| Subjects: | |
| Online Access: | http://studentrepo.iium.edu.my/handle/123456789/5103 |
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| Summary: | It is highly challenging to deploy group multimedia applications that are bandwidth intensive and delay sensitive in a scenario of mobile source over Wireless Mesh Networks (WMN). This is due to unavailability of efficient network layer routing support in WMN architecture of IEEE 802.11s. This is besides multicast source mobility problem and scarce resources of wireless networks. In addition, stringent application quality requirements of multimedia data necessitate consideration of both additive and concave metrics in the route selection. These challenges cause performance issues such as increased reconstruction cost overhead, in addition to packet loss and delay. Thus the main research question is how to support group application efficiently at the network layer for mobile source over WMN. Therefore, the focus of this research is to develop an enhanced network layer mobile multicast routing scheme for efficient support of group communication over WMN. The assumptions to solution comprise enhanced gateway functionality and optimized multicast shared tree based on Differential Evolution (DE) optimization. The proposed routing algorithm design is based on Mobile Multicast COmpliant WMN (M2COWMN) architecture and PROtocol model based TOPOlogy (PROTOPO) topology generator. The scheme also comprises routing algorithms namely: Differential Evolution based: ConStrained Unicast Path - DE-CSUP, Source Rooted Multicast Tree - DE-SRMT and Core Rooted Multicast Tree - DE-CRMT. These algorithms are implemented on AODV and MAODV benchmark protocols. Namely, DE-based Optimized Mobile Multicast Protocol for source and core rooted - DE-OMMPs and DE-OMMPc respectively; and DE-based OPtimized Unicast Protocol - DE-OPUP. The performance evaluation for PROTOPO is based on field topology data monitored on Freifunk Leipzig. This is beside analytical and simulation on MATLAB and NS2 simulation software. PROTOPO exhibits similar probability distribution of links as the field data, thus PROTOPO simulates valid WMN topology. DE-CSUP and DE-SRMT algorithms show convergence at 9th and 11th iterations respectively. While computational time complexity of DE-OPUP is O(3). DE-SRMT displays faster convergence (13th versus 20th iterations), peak improvement of 6% in success ratio and 39.97% for network size parameters than some existing multicast algorithms. Protocol benchmark results show 12.78% improvement in PDR and 61.53% in multicast tree cost for multicast group size parameter in DE-OMMPs over MAODV. While the case of DE-OMMPc over MAODV exhibits 12.81% and 25.47% improvements respectively. The peak improvements in PDR and delay of 24.31% and 44.60% are achieved in DE-OMMPs versus MAODV for multicast traffic load. DE-OMMPc versus DE-OMMPs incurs peak reconstruction cost and delay overheads above 56% under movement of multicast source. Thus the proposed routing algorithms and protocols outperform the benchmarks in most of the parameters considered. It is therefore inferred that the proposed mobile multicast scheme based on enhanced gateway functionality, DE-based optimized shared tree over WMN is an enhanced network layer mobile multicast routing support for group communication problems identified. |
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| Physical Description: | xix, 235 leaves : ill. ; 30cm. |
| Bibliography: | Includes bibliographical references (leave 216-225). |