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
US-0142368
(2008-06-19)
등록번호
US-8472456
(2013-06-25)
발명자
/ 주소
Damnjanovic, Jelena
Malladi, Durga Prasad
Willenegger, Serge D.
출원인 / 주소
QUALCOMM Incorporated
대리인 / 주소
Gallardo, Michelle
인용정보
피인용 횟수 :
1인용 특허 :
28
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▼
1. A method for scheduling transmissions in a communication system, comprising: determining a priority value for each of a plurality of mobile stations at an apparatus wherein the priority value is based on the mobile station's maximum pilot power and the mobile station's pilot power at the time of
1. A method for scheduling transmissions in a communication system, comprising: determining a priority value for each of a plurality of mobile stations at an apparatus wherein the priority value is based on the mobile station's maximum pilot power and the mobile station's pilot power at the time of scheduling; anddetermining a transmission schedule for the plurality of mobile stations based on the priority values. 2. The method of claim 1, wherein the priority value is determined using the 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 station's power at the time of scheduling. 3. A method for scheduling transmissions in a communication system, comprising: determining a priority value for each of a plurality of mobile stations at an apparatus, wherein the priority value is based on the mobile station's pilot power averaged over a period of time and the mobile station's pilot power at the time of scheduling; anddetermining a transmission schedule for the plurality of mobile stations based on the priority values. 4. The method of claim 3, wherein the priority value is determined using the function: Priority(i)=a(i)*(Pilot_Power Average(i)/Pilot_Power(i))where Priority(i) is a priority value for the ith mobile station, Pilot-Power_Average(i) is the mobile station's pilot power averaged over a period of time, Pilot_Power(i) is the mobile station's pilot power at the time of scheduling, and a(i) is a weighting factor. 5. The method of claim 4, wherein the weighting factor is based on the mobile station's speed. 6. The method of claim 4, wherein the weighting factor is determined using the function: a(i)=(sector_throughput/user_throughput(i))^b, wherein 0≦b≦1. 7. A non-transitory computer-readable medium comprising computer-executable instructions executable by at least one computer for performing a method for scheduling transmissions, the method comprising: determining a priority value for each of a plurality of mobile stations at an apparatus, wherein the priority value is based on the mobile station's maximum pilot power and the mobile station's pilot power at the time of scheduling; anddetermining a transmission schedule for the plurality of mobile stations based on the priority values. 8. The computer-readable medium of claim 7, wherein the priority value is determined using the 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 station's power at the time of scheduling. 9. A non-transitory computer-readable medium comprising computer-executable instructions executable by at least one computer for performing a method for scheduling transmissions, the method comprising: determining a priority value for each of a plurality of mobile stations at an apparatus, wherein the priority value is based on the mobile station's pilot power averaged over a period of time and the mobile station's pilot power at the time of scheduling; anddetermining a transmission schedule for the plurality of mobile stations based on the priority values. 10. The computer-readable medium of claim 9, wherein the priority value is determined using the function: Priority(i)=a(i)*(Pilot_Power Average(i)/Pilot_Power(i))where Priority(i) is a priority value for the ith mobile station, Pilot-Power_Average(i) is the mobile station's pilot power averaged over a period of time, Pilot_Power(i) is the mobile station's pilot power at the time of scheduling, and a(i) is a weighting factor. 11. The computer-readable medium of claim 10, wherein the weighting factor is based on the mobile station's speed. 12. The computer-readable medium of claim 10, wherein the weighting factor is determined using the function: a(i)=(sector_throughput/user_throughput(i))^b, wherein 0≦b≦1. 13. An apparatus in a communications system, comprising: means for determining a priority value for each of a plurality of mobile stations, wherein the priority value is based on the mobile station's maximum pilot power and the mobile station's pilot power at the time of scheduling; andmeans for determining a transmission schedule for the plurality of mobile stations based on the priority values. 14. The apparatus of claim 13, wherein the priority value is determined using the 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 station's power at the time of scheduling. 15. An apparatus in a communications system, comprising: means for determining a priority value for each of a plurality of mobile stations, wherein the priority value is based on the mobile station's pilot power averaged over a period of time and the mobile station's pilot power at the time of scheduling; andmeans for determining a transmission schedule for the plurality of mobile stations based on the priority values. 16. The apparatus of claim 15, wherein the priority value is determined using the function: Priority(i)=a(i)*(Pilot_Power Average(i)/Pilot_Power(i))where Priority(i) is a priority value for the ith mobile station, Pilot-Power_Average(i) is the mobile station's pilot power averaged over a period of time, Pilot_Power(i) is the mobile station's pilot power at the time of scheduling, and a(i) is a weighting factor. 17. The apparatus of claim 16, wherein the weighting factor is based on the mobile station's speed. 18. The apparatus of claim 16, wherein the weighting factor is determined using the function: a(i)=(sector_throughput/user_throughput(i))^b, wherein 0≦b≦1. 19. An apparatus in a communications system, comprising: a scheduler configured to: determine a priority value for each of a plurality of mobile stations, wherein the priority value is based on the mobile station's maximum pilot power and the mobile station's pilot power at the time of scheduling; anddetermine a transmission schedule for the plurality of mobile stations based on the priority values. 20. The apparatus of claim 19, wherein the priority value is determined using the 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 station's power at the time of scheduling. 21. An apparatus in a communications system, comprising: a scheduler configured to: determine a priority value for each of a plurality of mobile stations, wherein the priority value is based on the mobile station's pilot power averaged over a period of time and the mobile station's pilot power at the time of scheduling; anddetermine a transmission schedule for the plurality of mobile stations based on the priority values. 22. The apparatus of claim 21, wherein the priority value is determined using the function: Priority(i)=a(i)*(Pilot_Power Average(i)/Pilot_Power(i))where Priority(i) is a priority value for the ith mobile station, Pilot-Power_Average(i) is the mobile station's pilot power averaged over a period of time, Pilot_Power(i) is the mobile station's pilot power at the time of scheduling, and a(i) is a weighting factor. 23. The apparatus of claim 22, wherein the weighting factor is based on the mobile station's speed. 24. The apparatus of claim 22, wherein the weighting factor is determined using the function: a(i)=(sector_throughput/user_throughput(i))^b, wherein 0≦b≦1. 25. A base station in a communications system, comprising: an antenna for transmitting signals to a plurality of mobile stations and receiving signals transmitted by the plurality of mobile stations; anda scheduler configured to: determine a priority value for each of a plurality of mobile stations, wherein the priority value is based on the mobile station's maximum pilot power and the mobile station's pilot power at the time of scheduling; anddetermine a transmission schedule for the plurality of mobile stations based on the priority values. 26. The base station of claim 25, wherein the priority value is determined using the 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 station's power at the time of scheduling. 27. A base station in a communications system, comprising: an antenna for transmitting signals to a plurality of mobile stations and receiving signals transmitted by the plurality of mobile stations; anda scheduler configured to: determine a priority value for each of a plurality of mobile stations, wherein the priority value is based on the mobile station's pilot power averaged over a period of time and the mobile station's pilot power at the time of scheduling; anddetermine a transmission schedule for the plurality of mobile stations based on the priority values. 28. The base station of claim 27, wherein the priority value is determined using the function: Priority(i)=a(i)*(Pilot_Power Average(i)/Pilot_Power(i))where Priority(i) is a priority value for the ith mobile station, Pilot-Power_Average(i) is the mobile station's pilot power averaged over a period of time, Pilot_Power(i) is the mobile station's pilot power at the time of scheduling, and a(i) is a weighting factor. 29. The base station of claim 28, wherein the weighting factor is based on the mobile station's speed. 30. The base station of claim 28, wherein the weighting factor is determined using the function: a(i)=(sector_throughput/user_throughput(i))^b, wherein 0≦b≦1.
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