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UBC Theses and Dissertations
Performance of a new cellular channel assignment scheme including handoffs Wong, Gilbert Shu Wai
Abstract
As the demand for cellular communication services is increasing rapidly, it is important to achieve an efficient utilization of the allocated radio spectrum. To this end, a channel assignment scheme that is consistent with the objectives of increasing capacity and minimizing interference is required. In this thesis, a dynamic channel assignment (DCA) scheme with channel borrowing and re-assignment is proposed. With the channel borrowing and re-assigning strategy, a cell which has no channel available may borrow a channel from an available channel set of its neighboring cells. The performance of the proposed DCA scheme is studied through computer simulations in terms of blocking probabilities and handoff activities. A comparison of blocking probabilities between the proposed scheme and some existing channel assignment schemes is made. In the no handoff case, the proposed scheme can significantly improve the blocking probability of the cells that have a complete set of interfering cells. In the case with handoff, the adaptability of the channel borrowing and re-assigning strategy leads to a significant improvement in handoff blocking probability for both uniform and non-uniform traffic distributions. The proposed scheme also generally has a lower overall blocking probability.
Item Metadata
Title |
Performance of a new cellular channel assignment scheme including handoffs
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1998
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Description |
As the demand for cellular communication services is increasing rapidly, it is important to
achieve an efficient utilization of the allocated radio spectrum. To this end, a channel assignment
scheme that is consistent with the objectives of increasing capacity and minimizing interference is
required. In this thesis, a dynamic channel assignment (DCA) scheme with channel borrowing
and re-assignment is proposed. With the channel borrowing and re-assigning strategy, a cell
which has no channel available may borrow a channel from an available channel set of its
neighboring cells. The performance of the proposed DCA scheme is studied through computer
simulations in terms of blocking probabilities and handoff activities. A comparison of blocking
probabilities between the proposed scheme and some existing channel assignment schemes is
made. In the no handoff case, the proposed scheme can significantly improve the blocking
probability of the cells that have a complete set of interfering cells. In the case with handoff, the
adaptability of the channel borrowing and re-assigning strategy leads to a significant improvement
in handoff blocking probability for both uniform and non-uniform traffic distributions. The
proposed scheme also generally has a lower overall blocking probability.
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Extent |
3651964 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-05-28
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0064856
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
1998-11
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.