Time-slot Reuse in a Single Channel TDMA Mobile Radio System

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dc.contributor.advisor Sowerby, K en
dc.contributor.author Ahmed, Shirin en
dc.date.accessioned 2011-02-27T20:45:57Z en
dc.date.issued 2011 en
dc.identifier.uri http://hdl.handle.net/2292/6487 en
dc.description Full text is available to authenticated members of The University of Auckland only. en
dc.description.abstract Private networks which are used for commercial purposes like taxi or bus services and non-commercial purposes like security and public safety are normally based on specialised standards. A private network based on the P25 standards employs TDMA protocol as its multiple access scheme. Currently, each user is allocated a single time-slot in which to transmit or receive data. The purpose of this thesis is to investigate the potential for time-slot reuse in the service area of this network. The aim is to determine the average percentage of single and multiple time-slot reuse, and the effect of these results with the use of interference mitigation techniques such as joint power control and sectorised antennas at base stations. Another aim is to investigate the effect on the average percentage of time-slot reuse when mobiles are in motion, rather than stationary positions. The mean distance travelled by two mobiles with both successfully using the same time-slot is to be determined. The effect of direction of travel and the distance between two moving mobiles is also considered. It has been found that joint power control doubles the average percentage of single time-slot reuse. Joint power control shows a considerable effect in the cases of triple and quadruple time-slot reuse. It has been found that with the use of sectorised antennas at the base stations with power control, the percentage of single time-slot reuse increases by a factor of two or three depending on the signal-to-interference protection ratio selected for the system. It was also found that for a high percentage of single time-slot reuse and a large distance for two mobiles to travel while using a common time-slot, mobiles should be travelling in opposite directions, and there should be a distance of 30 km to 55 km between the two mobiles. The results presented in this thesis can contribute valuable information for scheduling and allocation of time-slots to users in the network considered. en
dc.publisher ResearchSpace@Auckland en
dc.relation.ispartof Masters Thesis - University of Auckland en
dc.relation.isreferencedby UoA99216476814002091 en
dc.rights Restricted Item. Available to authenticated members of The University of Auckland. en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.title Time-slot Reuse in a Single Channel TDMA Mobile Radio System en
dc.type Thesis en
thesis.degree.discipline Electrical and Electronic Engineering en
thesis.degree.grantor The University of Auckland en
thesis.degree.level Masters en
dc.rights.holder Copyright: the author en
pubs.elements-id 206608 en
pubs.record-created-at-source-date 2011-02-28 en


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