System and method for performance enhancement in heterogeneous wireless access network employing band selective power management
First Claim
1. A method for optimizing downlink transmission power of a distributed antenna system comprising a plurality of antenna units, comprising:
- collecting individual carrier load information from a multi-carrier base station communicating with each of the plurality of antenna units using a plurality of carriers;
varying a downlink transmission power for at least one carrier of the plurality of carriers to a different value from at least one other carrier based on the collected carrier load information and an individual weighing factor for the at least one carrier of the plurality of carriers, wherein power for the plurality of carriers is redistributed based on the weighing factors for the plurality of carriers to prioritize sharing of power between the plurality of carriers;
optimizing, based on the collected carrier load information, downlink transmission power of a subset of the plurality of antenna units to optimize the downlink transmission power of fewer than all of the plurality of antenna units communicating using the plurality of carriers;
determining a time period during which the at least one carrier has a carrier load that exceeds a predefined carrier load threshold;
comparing the time when the carrier load of the at least one carrier exceeds the predefined carrier load threshold to a temporal hysteresis threshold;
maintaining a change in downlink power transmission level to the at least one carrier when the time that the carrier load exceeds the predefined carrier load is greater than the temporal hysteresis threshold;
determining, based on the collected carrier load information, whether an average capacity of the distributed antenna system has improved compared to a prior average capacity;
in response to determining that the average capacity of the distributed antenna system has improved, increasing the transmission power for the subset of antenna units within the distributed antenna system to optimize the downlink transmission power of the subset of the antenna units; and
in response to determining that the average capacity of the distributed antenna system has failed to improve, reducing the downlink transmission power and terminating optimization of the downlink transmission power of the antenna units.
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Accused Products
Abstract
A system and method for enhancing the performance in heterogeneous wireless access networks employing a distributed antenna system is disclosed. A control unit comprises a distributed antenna system management server which collects load information from each of the carriers. The control unit further comprises a power management decision engine which determines the optimal downlink transmission power level for the carriers based on the collected load information and a set of parameters related to the power for the carriers. Power levels may decrease to baseline parameters when the load on carriers decreases.
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Citations
19 Claims
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1. A method for optimizing downlink transmission power of a distributed antenna system comprising a plurality of antenna units, comprising:
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collecting individual carrier load information from a multi-carrier base station communicating with each of the plurality of antenna units using a plurality of carriers; varying a downlink transmission power for at least one carrier of the plurality of carriers to a different value from at least one other carrier based on the collected carrier load information and an individual weighing factor for the at least one carrier of the plurality of carriers, wherein power for the plurality of carriers is redistributed based on the weighing factors for the plurality of carriers to prioritize sharing of power between the plurality of carriers; optimizing, based on the collected carrier load information, downlink transmission power of a subset of the plurality of antenna units to optimize the downlink transmission power of fewer than all of the plurality of antenna units communicating using the plurality of carriers; determining a time period during which the at least one carrier has a carrier load that exceeds a predefined carrier load threshold; comparing the time when the carrier load of the at least one carrier exceeds the predefined carrier load threshold to a temporal hysteresis threshold; maintaining a change in downlink power transmission level to the at least one carrier when the time that the carrier load exceeds the predefined carrier load is greater than the temporal hysteresis threshold; determining, based on the collected carrier load information, whether an average capacity of the distributed antenna system has improved compared to a prior average capacity; in response to determining that the average capacity of the distributed antenna system has improved, increasing the transmission power for the subset of antenna units within the distributed antenna system to optimize the downlink transmission power of the subset of the antenna units; and in response to determining that the average capacity of the distributed antenna system has failed to improve, reducing the downlink transmission power and terminating optimization of the downlink transmission power of the antenna units. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 19)
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9. A wireless system, comprising:
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a multi-carrier base station receiving from each of a plurality of antenna units of a distributed antenna system multi-carrier communication signals having a plurality of carriers, the multi-carrier base station comprising one or more multi-carrier amplifier systems configured to amplify the multi-carrier communication signals; one or more antennas coupled to the base station and configured to provide a downlink signal; and
,a power management control unit configured to; vary a downlink transmission power for at least one carrier of the plurality of carriers to a different value from at least one other carrier based on the collected carrier load information and an individual weighing factor for the at least one carrier of the plurality of carriers, wherein power for the plurality of carriers is redistributed based on the weighing factors for the plurality of carriers to prioritize sharing of power between the plurality of carriers; optimize, based on the collected carrier load information, downlink transmission power of a subset of the plurality of antenna units to optimize the downlink transmission power of fewer than all of the plurality of antenna units communicating using the plurality of carriers; determine a time period during which the at least one carrier has a carrier load exceeds a predefined carrier load threshold; compare the time when the carrier load of the at least one carrier exceeds the predefined carrier load threshold to a temporal hysteresis threshold; maintain a change in downlink power transmission level to the at least one carrier when the time that the carrier load exceeds the predefined carrier load is greater than the temporal hysteresis threshold; determine, based on the collected carrier load information, whether an average capacity of the distributed antenna system has improved compared to a prior average capacity; in response to determining that the average capacity of the distributed antenna system has improved, increase the transmission power for the subset of antenna units within the distributed antenna system to optimize the downlink transmission power of the subset of the antenna units; and in response to determining that the average capacity of the distributed antenna system has failed to improve, reduce the downlink transmission power and terminate optimization of the downlink transmission power of the antenna units. - View Dependent Claims (10, 11, 12, 13)
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14. A wireless distributed antenna system, comprising:
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a multi-carrier base station configured to receive multi-carrier communication signals having a plurality of carriers, the multi-carrier base station comprising one or more multi-carrier amplifier systems configured to amplify the multi-carrier communication signals; a distributed antenna system having a plurality of separate antenna systems, the distributed antenna system coupled to the multi-carrier base station and configured to provide a downlink signal; and
,a control unit coupled to the multi-carrier base station and configured to; collect load information of the plurality of carriers, provide different values of downlink transmission power to the multi-carrier amplifier systems based on the collected carrier load information and an individual weighing factor each carrier of the plurality of carriers, wherein power for the plurality of carriers is redistributed based on the weighing factors for the plurality of carriers to prioritize sharing of power between the plurality of carriers, optimize, based on the collected carrier load information, the downlink transmission power to a subset of the plurality of multi-carrier amplifier systems to optimize the downlink transmission power of fewer than all of the plurality of multi-carrier amplifier systems communicating using the plurality of carriers; determine a time period during which the at least one carrier has a carrier load exceeds a predefined carrier load threshold; compare the time when the carrier load of the at least one carrier exceeds the predefined carrier load threshold to a temporal hysteresis threshold; maintain a change in downlink power transmission level to the at least one carrier when the time that the carrier load exceeds the predefined carrier load is greater than the temporal hysteresis threshold; determine, based on the collected carrier load information, whether an average capacity of the distributed antenna system has improved compared to a prior average capacity; in response to determining that the average capacity of the distributed antenna system has improved, increase the transmission power for the subset of antenna units within the distributed antenna system to optimize the downlink transmission power of the subset of the antenna units; and in response to determining that the average capacity of the distributed antenna system has failed to improve, reduce the downlink transmission power and terminate optimization of the downlink transmission power of the antenna units. - View Dependent Claims (15, 16, 17, 18)
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Specification