| Author: | Chan, Chuen-ming Anthony |
| Title: | Medium access control (MAC) for ATM-based multiservice wireless personal communication network (PCN) |
| Degree: | M.Sc. |
| Year: | 1997 |
| Subject: | Wireless communication systems Broadband communication systems Mobile communication systems Integrated services digital networks Asynchronous transfer mode Hong Kong Polytechnic University -- Dissertations |
| Department: | Multi-disciplinary Studies |
| Pages: | xii, 93, [111] leaves : ill. ; 30 cm |
| Language: | English |
| Abstract: | Next-generation multiservices personal communication networks (PCN) soon to be deployed in the near future will be expected to support not only digital voice, but also a range of data and multimedia services. These services span a fairly broad range of bit-rate, service class, and quality-of-service (QoS). Due to the anticipated demand on wireless extensions to future broadband networks, several research organizations have proposed an ATM-based wireless transport architecture capable of supporting 'mobile access' to a mix of broadband ISDN services including constant-bit-rate (CBR), variable-bit-rate (VBR), and packet data. One of the most important and challenging design criteria related to multiservices PCN design is the selection of a suitable 'multimedia capable' medium access control (MAC) techniques at the data-link layer which is also the objective of this project to attempt identifying a suitable MAC protocol. This dissertation aims to present and outline the approach and the methodology on selecting the MAC protocol for use in next-generation ATM-Based multiservice PCN. A review on the current technologies in both fixed broadband and mobile communications is made and the trend favouring the 'wireless ATM' access is explored. The basic requirements of a proper MAC protocol for wireless access are discussed. Additional requirements and design principles on a MAC protocol suitable for 'wireless ATM' access are also highlighted and explained. A survey on seven different MAC proposals for wireless ATM access, each with a fairly detail examination, has been carried out. Comparison on these MAC protocols is made based on their fulfilments on the discussed requirements as well as some defined attributes and features of a MAC protocol. One of the promising MAC protocol, Multiservice Dynamic Reservation TDMA (MDR-TDMA) has been selected particularly for more detailed study by computer simulation. A C-language based simulation program has been written to run on a PC to simulate a mobile cell environment with voice users and data users accessing the channel according to some pre-determined baseline parameter values. The original TOE queue service scheme suggested by Raychaudhuri [1] and two other variants of TOE scheme proposed by the author have been selected and simulated. The performance measures are based on the channel throughput, voice access delay, voice blocking probability, data access delay and data packet loss probability. Based the results from the simulation, a fairly good performance of channel utilization (throughput) of 58-64% is observed at total channel load of 0.6-0.65. The voice blocking probability of <= 1 % and average message / data transmission delay of <= 40 msec can be maintained at this nominal operating point. This MDR-TDMA protocol is therefore found to be suitable for use as a MAC protocol for 'wireless ATM' access next-generation multiservices PCN. In fact, this MDR-TDMA MAC protocol has been adopted and implemented on a working prototype microcellular wireless asynchronous transfer mode network (WATMnet) capable of providing integrated multimedia communication services to mobile terminals. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| b14201860.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 7.45 MB | Adobe PDF | View/Open |
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