System, and associated method, for scheduling weighted transmissions from multiple antennas
First Claim
1. A method for scheduling weighted transmissions from two or more transmit antennas of a base station to each of two or more mobile stations in a closed-loop transmit diversity system, the method comprising steps of:
- determining the quantity of power available for data transmission from each transmit antenna;
determining each combination of set of mobile stations that may be served simultaneously by a base station;
for each combination set, computing unused power Δ
with reference to the quantity of power available for data transmission from each transmit antenna, and the power required to transmit data from each transmit antenna to each respective mobile station in the said set;
for each of said combination sets of mobile stations, computing a global cost from a global cost function with reference to one or more variables, including said unused power Δ
;
determining the combination set of mobile stations that has a substantially minimum global cost; and
scheduling the transmission of data from each transmit antenna to the mobile stations which constitute said combination set of mobile stations that has a substantially minimum global cost.
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Accused Products
Abstract
A method for scheduling weighted transmissions from two or more transmit antennas of a base station to each of two or more mobile stations in a closed-loop transmit diversity system, whereby the quantity of power available for data transmission from each transmit antenna is determined and, with respect to each antenna, the power required to transmit data to each mobile station is determined. The number of mobile stations that may be served simultaneously by a base station is determined and, for each combination of respective mobile stations constituting the number of mobile stations that may be served simultaneously, the transmission of data from each transmit antenna to the mobile stations is scheduled to minimize unused power.
20 Citations
20 Claims
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1. A method for scheduling weighted transmissions from two or more transmit antennas of a base station to each of two or more mobile stations in a closed-loop transmit diversity system, the method comprising steps of:
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determining the quantity of power available for data transmission from each transmit antenna; determining each combination of set of mobile stations that may be served simultaneously by a base station; for each combination set, computing unused power Δ
with reference to the quantity of power available for data transmission from each transmit antenna, and the power required to transmit data from each transmit antenna to each respective mobile station in the said set;for each of said combination sets of mobile stations, computing a global cost from a global cost function with reference to one or more variables, including said unused power Δ
;determining the combination set of mobile stations that has a substantially minimum global cost; and scheduling the transmission of data from each transmit antenna to the mobile stations which constitute said combination set of mobile stations that has a substantially minimum global cost. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A base station comprising:
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two or more transmit antennas, each of which comprises a quantity of power available for the transmission of data; an electronic data processor adapted for executing program code, said processor being connected to said two or more, transmit antennas and being configured for configuring data for transmission via said two or more transmit antennas; a memory connected to said processor, the memory comprising; program code for determining each combination of set of mobile stations that may be served simultaneously by a base station; program code for computing, for each combination of set of mobile stations, unused power Δ
with reference to the quantity of power, available for data transmission from each transmit antenna, and the power required to transmit data from each transmit antenna to each respective mobile station in the said set;program code for computing, for each of said combination sets of mobile stations, a global cost from a global cost function with reference to one or more variables, including said unused power Δ
;program code for determining the combination set of mobile stations that has a substantially minimum global cost; and program code for scheduling the transmission of data from each transmit antenna to the mobile stations which constitute said combination set of mobile stations that has a substantially minimum global cost. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A closed-loop transmit diversity system comprising:
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two or more transmit antennas, each of which comprises a quantity of power available for the transmission of data; two or more mobile stations, each of said mobile stations being adapted for transmitting indications of the strength of each channel of radio communication established with each of said two or more transmit antennas; at least one receive antenna configured for receiving from each of said two or more mobile stations said indications of the strength of each channel of radio communication established with each of said two or more transmit antennas; an electronic data processor adapted for executing program code, said processor being connected to said two or more transmit antennas and to said at least one receive antenna, said processor being configured for receiving said indications from said receive antenna and for configuring data for transmission via said two or more transmit antennas; a memory connected to said processor, the memory comprising; program code for determining, based on said indications of channel strength, the quantity of power required to transmit data on each of said two or more transmit antennas; program code for determining each combination of set of mobile stations that may be served simultaneously by a base station; program code for computing, for each combination of set of mobile stations, unused power Δ
with reference to the quantity of power available for data transmission from each transmit antenna, and the power required to transmit data from each transmit antenna to each respective mobile station in the said set;program code for computing, for each of said combination sets of mobile stations, a global cost from a global cost function with reference to one or more variables, including said unused power Δ
;program code for determining the combination set of mobile stations that has a substantially minimum global cost; and program code for scheduling the transmission of data from each transmit antenna to the mobile stations which constitute said combination set of mobile stations that has a substantially minimum global cost. - View Dependent Claims (18, 19, 20)
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Specification