System and method for improved mobile communication admission and congestion control
First Claim
1. An communication system, comprising:
- a base station control system that dynamically adjusts a maximum output power threshold according to a specified system outage probability so as to compensate for variations in mobile traffic characteristics experienced by a base station over time.
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Abstract
A wireless communication system is provided for improving the quality of service and capacity utilization by dynamically adjusting optimum transmission signal power levels in response to changes in transmission signal and mobile station characteristics, so as to maintain a system outage probability below a desired level. A code division multiple access (CDMA) mobile communication system improved control and capacity utilization are achieved by dynamically adjusting the admission control threshold and/or congestion detection threshold to compensate for variations in the characteristics of the signals and mobile station loading of a base station. In one embodiment, a CDMA base station and control system may include a transmission power detector or sampler coupled to a power control of a transceiver and a transmission power estimator. The power estimator may be a K'"'"'th moment estimator and be coupled to an admission control threshold estimator and a capacity estimator. The capacity estimator may be coupled to an admission and/or congestion controller. In general, the CDMA forward link admission control and congestion control mechanisms for admitting or releasing a mobile station from a base station cell operate to dynamically self-configure their admission control threshold and/or congestion detection threshold in order to maintain an outage probability below the desired level. In one embodiment, the average total base station transmission power of a sample set of recent system operation and the variability of the base station transmission power within the sample set are used to dynamically self-configure the system. Therefore, the present invention provides a more efficient method for obtaining optimum quality of service and capacity utilization based on determining a desired maximum outage probability and configuring the base station control system to dynamically self-configure its admission and/or congestion thresholds to meet the outage probability constraints.
108 Citations
26 Claims
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1. An communication system, comprising:
a base station control system that dynamically adjusts a maximum output power threshold according to a specified system outage probability so as to compensate for variations in mobile traffic characteristics experienced by a base station over time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 19, 20, 21, 22, 23, 24, 25, 26)
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12. A communication system, comprising:
a transmit power K'"'"'th moment estimator.
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18. A method, comprising the step of:
adjusting automatically a maximum output power threshold of a base station transmitter in real time according to a specified system outage probability using a control system configured to self-configure said maximum output power threshold so as to compensate for variations in mobile traffic characteristics experienced by said base station over time.
Specification