Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
1995-06-05
2003-07-22
Chin, Vivian (Department: 2682)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S012100, C455S428000, C455S453000
Reexamination Certificate
active
06597913
ABSTRACT:
TECHNICAL FIELD
This invention relates generally to cellular communications and, in particular, to methods for performing dynamic channel management in a cellular system.
BACKGROUND OF THE INVENTION
Conventional channel management methods are based on the assumption that traffic demands can be accurately predicted both as a function of time and geographic location over the earth. If this assumption was true, it would be possible to estimate how many channels are needed per cell as a function of time and pre-allocate the requisite channels to satisfy the expected demand. In reality, this is a very unlikely situation because actual demand cannot be predicted very accurately because of the stochastic nature of the traffic demands.
There are a few drawbacks of conventional channel management methods which use static assumptions and models. First, there is bandwidth wastage when actual channel or caller demand falls short of the pre-allocated amount. Calls could be better allocated to base stations which are experiencing less than expected caller demand (i.e., under-utilized base stations). Second, there may be bandwidth shortage resulting in blocked and dropped calls when the actual channel demand exceeds the pre-allocated amount. These disadvantages, bandwidth wastage and shortage, are just a few of the problems associated with channel management when based on static or historic caller demands rather than actual traffic demands. Accordingly, there is a significant need for dynamic channel management methods that overcome the disadvantages of static channel management and enables a cellular communication system to be more responsive to actual traffic demand conditions.
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Yasuda, Y., Kidou, S., and Macbara, A., “A Channel Management Scheme for Dynamic Assignment on Multi Beam Mobile Satellite Communications Systems”. Communications: The Global Bridge., IEEE, vol. 2, 1993, pp. 755-759.
Bogacz Frank
Chin Vivian
McGurk, IV Harold C.
Moore James K
Motorola Inc.
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