An adaptive multi-threshold bandwidth reservation for multi-services in a cellular system | |
| Author | Jairak Tanpaiboonkul |
| Call Number | AIT Thesis no.TC-05-9 |
| Subject(s) | Cellular telephone systems Telecommunication--Traffic |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | The Call Admission Control in a multi-service wireless network has to support mobility of user in both real time and non real time traffic classes. The real time traffic such as voice and video is normally assigned as the high priority over non-real time traffic. This thesis studies the multi-threshold bandwidth reservation for multiservices in a cellular system. An adaptive threshold with force termination scheme is proposed to efficiently perform with the unexpected traffic conditions. In certain cases existing calls can be terminated to admit offered handoff calls. The users priority of a forced termination is classified by its call holding time and call residing time. Two schemes are considered: forced termination at the end of threshold period and immediate forced termination scheme. The system performance is investigated in terms of handoff voice call dropping probability, new voice call blocking probability, data call blocking probability, average bit rate per data session and bandwidth utilization. The simulation results show that the multi-threshold bandwidth reservation for multi-services system can control the handoff call blocking probability. In addition, applying the force termination scheme improves the system performance. In the immediate forced termination scheme, the threshold can be adjusted to force all the ongoing calls or all handoff request calls. If data calls are allowed to take all the rest bandwidth in every partition, the best bandwidth utilization is achieved without having any effect on the real time traffic performance. |
| Year | 2005 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Telecommunications (TC) |
| Chairperson(s) | Erke, Tapio J. |
| Examination Committee(s) | Ahmed, Kazi M.;Teerapat Sanguankotchakorn |
| Scholarship Donor(s) | Royal Thai Government Fellowships |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2005 |