Multiplex communications – Communication over free space – Combining or distributing information via time channels
Patent
1995-11-21
1998-03-17
Safourek, Benedict V.
Multiplex communications
Communication over free space
Combining or distributing information via time channels
370444, 370455, 370462, 455512, 455513, H04Q 730
Patent
active
057295425
ABSTRACT:
A method and apparatus for accessing a communication system relies on the use of varying access probabilities for subscribers or messages of varying priority. A serving infrastructure entity (e.g., a base station) determines access probabilities (e.g., p.sub.hi and p.sub.lo where there are two classes of subscribers) in response to known system parameters like the current rate of access attempts for each priority class of user/message. Values representative of these access probabilities are then transmitted to the subscriber unit(s), for example by use of a system broadcast channel or control channels. These values are then used by the subscriber units in determining when to access an uplink channel. A temporal and/or proportional priority distribution approach is preferably used in determining the access values. As a result of this contention-based prioritization, an expedited access is achieved by higher priority units/traffic, thus increasing their throughput.
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Rivest, Ronald L., "Network Control by Bayesian Broadcast", IEEE Transactions on Information Theory, vol. IT-33, No. 3, May 1987, pp. 323-328.
Robertson, Clark R. et al., "A Model for Local/Mobile Radio Communications with Correct Packet Capture", IEEE Transactions on Communications, vol. 40, No. 4, Apr. 1992, pp. 847-854.
Motorola Inc.
Safourek Benedict V.
Wood J. Ray
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