Method and apparatus for channel sensitive scheduling in a communication system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04L-001/00
H04J-003/16
G08C-015/00
G06F-011/00
G01R-031/08
출원번호
UP-0040871
(2005-01-20)
등록번호
US-7551637
(2009-07-01)
발명자
/ 주소
Damnjanovic, Jelena
Malladi, Durga Prasad
Willenegger, Serge D.
출원인 / 주소
QUALCOMM Incorporated
대리인 / 주소
Vo, Dang M.
인용정보
피인용 횟수 :
17인용 특허 :
12
초록▼
Method and apparatus for a channel sensitive scheduler for scheduling transmissions in a communication system. The scheduler is defined by a priority function of the channel condition as determined by amount of transmission power needed by a mobile station. In one embodiment the channel condition is
Method and apparatus for a channel sensitive scheduler for scheduling transmissions in a communication system. The scheduler is defined by a priority function of the channel condition as determined by amount of transmission power needed by a mobile station. In one embodiment the channel condition is determined based on the transmission pilot power of each mobile station and is used to calculate a priority value for each mobile station. The mobile stations are then scheduled to transmit based on the priority value.
대표청구항▼
What is claimed is: 1. A method of scheduling transmissions in a wireless communication system, comprising: receiving a channel condition indicator sent by a mobile station at a scheduler, determining a priority value for the mobile station using a function: Priority(i)=Pilot_Power_Max-Pilot_Powe
What is claimed is: 1. A method of scheduling transmissions in a wireless communication system, comprising: receiving a channel condition indicator sent by a mobile station at a scheduler, determining a priority value for the mobile station using a function: Priority(i)=Pilot_Power_Max-Pilot_Power(i), where Priority(i) is the priority value for the ith mobile user, Pilot_Power_Max is the mobile station's maximum pilot power, and Pilot_Power(i) is the mobile station's pilot power at time of scheduling. 2. The method of claim 1 further comprising: calculating priority values for a plurality of mobile stations as a function of the channel condition indicator; and selecting at least one of the plurality of mobile stations for a subsequent transmission based on the priority value. 3. The method of claim 1 wherein: the channel condition indicator is based upon the mobile station's transmit pilot power and requested data rate. 4. The method of claim 1 wherein: the channel condition indicator is based upon the mobile station's transmit power as determined by power control commands. 5. A method of scheduling in a wireless communication system, comprising: receiving a channel condition indicator sent by a mobile station at a scheduler, determining a priority value for the mobile user using a function: Priority(i)=a(i)*(Pilot_Power_Average( i)/Pilot Power(i)) where Priority(i) is a priority value for an i-th mobile user, Pilot_Power_Average(i) is a mobile station's pilot power averaged over a certain period of time, Pilot_Power(i) is a mobile station's pilot power at the moment of scheduling, and a(i) is a weighting factor. 6. The method of claim 5 wherein: the weighting factor is based upon the mobile user's speed. 7. The method of claim 5 wherein: the weighing factor is computed according to a function: a(i)=(sector_throughput/user_throughput(i ))^b, where 0≦b≦1. 8. A computer-readable medium containing computer-executable instructions for performing a method of scheduling transmissions, the method comprising: processing channel condition indicators received from a plurality of mobile stations; calculating a priority value for each of a plurality of mobile stations using a function: Priority(i)=Pilot_Power_Max-Pilot_Power(i), where Priority(i) is the priority value for the ith mobile station Pilot_Power_Max is the mobile station's maximum pilot power, and Pilot_Power(i) is the mobile user's pilot power at time of scheduling; and determining a transmission schedule for the plurality of mobile stations as a function of the priority values. 9. A computer-readable medium containing computer-executable instructions for performing a method of scheduling transmissions, the method comprising: processing channel condition indicators received from a plurality of mobile stations; calculating a priority value for each of a plurality of mobile stations using a function: Priority(i)=a(i)*(Pilot_Power_Average( i)/Pilot_Power(i)) where Priority(i) is a priority value for an i-th mobile station, Pilot_Power_Average(i) is the mobile station's pilot power averaged over a certain period of time, Pilot_Power(i) is the mobile station's pilot power at the moment of scheduling, and a(i) is the weighting factor; and determining a transmission schedule for the plurality of mobile stations as a function of the priority values. 10. The computer-readable medium as in claim 9, wherein the weighting factor is computed according to a function: a(i)=(sector_throughput/user_throughput(i ))^b, where 0≦b≦1. 11. An apparatus, comprising: means for receiving channel condition indicators from a plurality of mobile stations; means for determining a priority value for each mobile station, wherein the priority value is a function of: Priority(i)=Pilot_Power_Max-Pilot_Power(i), where Priority(i) is the priority value for the ith mobile station Pilot_Power_Max is the mobile station's maximum pilot power, and Pilot_Power(i) is the mobile station's pilot power at time of scheduling; and means for determining a transmission schedule for the plurality of mobile stations based on the priority values. 12. An apparatus, comprising: means for receiving channel condition indicators from a plurality of mobile stations; means for determining a priority value for each mobile station, wherein the priority value is a function of: Priority(i)=a(i)*(Pilot_Power_Average( i)/Pilot_Power(i)) where Priority(i) is a priority value for an i-th mobile station, Pilot_Power _Average(i) is the mobile station--s pilot power averaged over a certain period of time Pilot_Power(i) is the mobile station's pilot power at the moment of scheduling, and a(i) is the weighting factor; and means for determining a transmission schedule for the plurality of mobile stations based on the priority value. 13. The apparatus of claim 12, wherein the weighting factor is a function of: a(i)=(sector_throughput/user_throughput(i ))^b, where 0≦b≦1. 14. An apparatus in a wireless communication system, comprising: a processing element; and a memory storage element coupled to the processing element, the memory storage element adapted for storing computer-readable instructions for implementing: means for receiving a channel condition indicator from a plurality of mobile stations; means for computing a priority value for each mobile station based on the channel condition indicator, wherein the priority value is a function of: Priority(i)=Pilot_Power_in Max-Pilot_Power(i), where Priority(i) is the priority value for the ith mobile station, Pilot_Power_Max is the mobile station's maximum pilot power, and Pilot_Power(i) is the mobile station's pilot power at time of scheduling; and means for scheduling the plurality of mobile stations based on the computed priority values. 15. An apparatus in a wireless communication system, comprising: a processing element; and a memory storage element coupled to the processing element, the memory storage element adapted for storing computer-readable instructions for implementing: means for receiving a channel condition indicator from a plurality of mobile stations; means for computing a priority value for each mobile station based on the channel condition indicator, wherein the priority value is a function of: Priority(i)=a(i)*(Pilot_Power_Average( i)/Pilot_Power(i)) where Priority(i) is a priority value for an i-th mobile user, Pilot_Power_Average(i) is a mobile station's pilot power averaged over a certain period of time, Pilot_Power(i) is a mobile station's pilot power at the moment of scheduling, and a(i) is a weighting factor; and means for scheduling the plurality of mobile stations based on the computed priority values. 16. The apparatus of claim 15 wherein: the weighting factor is based upon the mobile user's speed. 17. The apparatus of claim 15 wherein: the weighting factor is computed according to a function: a(i)=(sector_throughput/user_throughput(i ))^b, where 0≦b≦1.
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이 특허에 인용된 특허 (12)
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Gilhousen Klein S. (San Diego CA) Jacobs Irwin M. (La Jolla CA) Weaver ; Jr. Lindsay A. (San Diego CA), Spread spectrum multiple access communication system using satellite or terrestrial repeaters.
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