Modeling and analysis of delay performance for wireless regional area networks in the joint scenario of self-coexistence and incumbent coexistence | |
| Author | Khan, Sheraz |
| Call Number | AIT Diss no.TC-20-01 |
| Subject(s) | Wireless communication systems Wide area networks (Computer networks) Cognitive radio networks |
| Note | A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Engineering in Telecommunications, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Dissertation ; no. TC-20-01 |
| Abstract | In addition to incumbent coexistence, self-coexistence is expected to be common among wireless regional area networks (WRANs) using TV white space (TVWS) due to their large coverages. Among incumbents of WRANs are wireless microphones (WMs) whose frequent activations and deactivations result in intermittent availability of transmission channels. Cognitive radio systems under incumbent coexistence, including WRANs, have been modeled for queueing analysis using two-dimensional (2D) Markov chains taking into account intermittent channel availability. However, the self-coexistence mode of WRAN operations remains to be incorporated into the queueing model. First, a simple model is developed for a WRAN under self-coexistence in addition to incumbent coexistence using a 2D Markov chain modified from an existing model for cognitive radio. The matrix geometric method is used to numerically compute steady-state probabilities of the Markov chain, which are then used to evaluate the mean packet delay performance. The model is further modified to let a WRAN switch from the selfcoexistence mode to the normal mode of transmission. In the latter part of this work, additional 2D Markov chain models are developed for multichannel operations, taking into account multiple WRANs. Analytical results are verified with results from simulation experiments. These results are then used to quantify the mean packet delay improvement obtained from channel sharing among WRANs under self-coexistence. Finally, the impact of variation in the number of channels on the delay performance is observed. |
| Year | 2020 |
| Corresponding Series Added Entry | Asian Institute of Technology. Dissertation ; no. TC-20-01 |
| Type | Dissertation |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Telecommunications (TC) |
| Chairperson(s) | Poompat Saengudomlert; |
| Examination Committee(s) | Teerapat Sanguankotchakorn;Attaphongse Taparugssanagorn;Singh, Jai Govind; |
| Scholarship Donor(s) | University of Engineering and Technology, Peshawar, Pakistan; |
| Degree | Thesis (Ph.D.) - Asian Institute of Technology, 2020 |