Controlling multiple modems in a wireless terminal using dynamically varying modem transmit power limits
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04B-007/216
H04B-007/204
H04L-001/00
H04Q-007/20
출원번호
US-0217819
(2005-09-01)
등록번호
US-7366142
(2008-04-29)
발명자
/ 주소
Ngai,Francis M.
Gholmieh,Aziz
Gerecht,Douglas A.
Anderson,Jon J.
Panton,William R.
출원인 / 주소
QUALCOMM Incorporated
대리인 / 주소
Ogrod,Gregory D.
인용정보
피인용 횟수 :
8인용 특허 :
18
초록▼
A mobile wireless terminal (MWT) includes multiple wireless modems. The multiple modems have their respective transmit outputs combined together to produce an aggregate transmit output. The multiple modems can concurrently transmit data in a reverse link direction and receive data in a forward link
A mobile wireless terminal (MWT) includes multiple wireless modems. The multiple modems have their respective transmit outputs combined together to produce an aggregate transmit output. The multiple modems can concurrently transmit data in a reverse link direction and receive data in a forward link direction. The MWT is constrained to operate under an aggregate transmit power limit. Each of the multiple modems has an individual transmit limit related to the aggregate transmit power limit. An MWT controller adjusts the individual transmit power limits in the multiple modems based on an aggregate transmit power limit of the MWT and respective transmit power estimates from the modems, to cause each individual transmit power limit to track a corresponding individual modem transmit power.
대표청구항▼
The invention claimed is: 1. A method of controlling transmit power in a data terminal constrained to operate within an aggregate transmit power limit, the data terminal including N wireless modems having their respective transmit outputs combined to produce an aggregate transmit output, the method
The invention claimed is: 1. A method of controlling transmit power in a data terminal constrained to operate within an aggregate transmit power limit, the data terminal including N wireless modems having their respective transmit outputs combined to produce an aggregate transmit output, the method comprising: (a) establishing an individual transmit power limit in each of the N modems; (b) scheduling each of a plurality of the N modems to transmit respective data; (c) receiving a respective, reported transmit power estimate from each of the N modems; and (d) adjusting the individual transmit power limits in at least some of the N modems based on the aggregate transmit power limit and the respective transmit power estimates from the N modems, to cause each individual transmit power limit to track a corresponding individual modem transmit power. 2. The method of claim 1, wherein step (d) comprises adjusting the individual transmit power limits such that when the N individual transmit power limits are combined into a combined transmit power limit, the combined transmit power limit is less than or equal to the aggregate transmit power limit, and each individual transmit power limit is greater than the corresponding individual modem transmit power. 3. The method of claim 1, further comprising, prior to step (a), establishing an individual wireless communication link between each of the N modems and a remote station, each communication link including a forward link and a reverse link. 4. The method of claim 3, wherein each wireless communication link is a Code Division Multiple Access (CDMA) communication link. 5. In a data terminal constrained to operate within an aggregate transmit power limit, the data terminal including N wireless modems having their respective transmit outputs combined to produce an aggregate transmit output, the modems having individual transmit power limits to limit their respective transmit powers, the modems reporting respective transmit power estimates, a method of deriving the individual transmit power limits, comprising: (b) determining an aggregate transmit power encompassing all of the N modems; (b) deriving an aggregate transmit power margin based on a difference between the aggregate transmit power and the aggregate transmit power limit; and (c) dividing the aggregate transmit power margin among the N modems to produce, for each of the N modems, an individual transmit power limit that is greater than the corresponding transmit power estimate for each modem. 6. The method of claim 5, wherein step (c) comprises dividing the aggregate transmit power equally among the N modems. 7. The method of claim 5, further comprising, prior to step (a): producing a corrected transmit power estimate from each transmit power estimate using a corresponding predetermined, modem gain correction factor; and performing steps (a) and (c) using the corrected transmit power estimates. 8. An apparatus for controlling a wireless terminal constrained to operate within an aggregate transmit power limit, the wireless terminal including N wireless modems having their respective transmit outputs combined to produce an aggregate transmit output, comprising: means for establishing an individual transmit power limit in each of the N modems; means for scheduling each of a plurality of the N modems to transmit respective data; means for receiving a respective, reported transmit power estimate from each of the N modems; and means for adjusting the individual transmit power limits in at least some of the N modems based on the aggregate transmit power limit and the respective transmit power estimates from the N modems, to cause each individual transmit power limit to track a corresponding individual modem transmit power. 9. The apparatus of claim 8, wherein the adjusting means comprises means for adjusting the individual transmit power limits such that when the N individual transmit power limits are combined into a combined transmit power limit, the combined transmit power limit is less than or equal to the aggregate transmit power limit, and each individual transmit power limit is greater than the corresponding individual modem transmit power. 10. An apparatus for deriving modem transmit limits in a wireless terminal constrained to operate within an aggregate transmit power limit, the wireless terminal including N wireless modems having their respective transmit outputs combined to produce an aggregate transmit output, the modems having individual transmit power limits to limit their respective transmit powers, the modems reporting respective transmit power estimates, comprising: means for determining an aggregate transmit power encompassing all of the N modems; means for deriving an aggregate transmit power margin based on a difference between the aggregate transmit power and the aggregate transmit power limit; and means for dividing the aggregate transmit power margin among the N modems to produce, for each of the N modems, an individual transmit power limit that is greater than the corresponding transmit power estimate for each modem. 11. The apparatus of claim 10, wherein the dividing means comprises dividing the aggregate transmit power equally among the N modems. 12. A computer-readable medium storing instructions for controlling transmit power in a data terminal constrained to operate within an aggregate transmit power limit, the data terminal including N wireless modems having their respective transmit outputs combined to produce an aggregate transmit output, the instructions comprising: instructions to establish an individual transmit power limit in each of the N modems; instructions to schedule each of a plurality of the N modems to transmit respective data; instructions to receive a respective, reported transmit power estimate from each of the N modems; and instructions to adjust the individual transmit power limits in at least some of the N modems based on the aggregate transmit power limit and the respective transmit power estimates from the N modems, to cause each individual transmit power limit to track a corresponding individual modem transmit power.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (18)
Kao Chiihsin ; Chen Chunta ; Liu Ming-Kang, ADSL transceiver implemented with associated bit and energy loading integrated circuit.
Masters Jeffrey Tony ; Yurtkuran Erol Kenneth ; Molina Victor Hugo ; Ho Shin-Fang, Dynamic adaptive modulation negotiation for point-to-point terrestrial links.
Wheatley ; III Charles E. (Del Mar CA) Padovani Roberto (San Diego CA) Zehavi Ephraim (San Diego CA), Fast forward link power control in a code division multiple access system.
Sindhushayana, Nagabhushana T.; Attar, Rashid A.; Esteves, Eduardo A. S., Method and apparatus for a rate control in a high data rate communication system.
Gilhousen Klein S. (San Diego CA) Padovani Roberto (San Diego CA) Wheatley ; III Charles E. (Del Mar CA), Method and apparatus for controlling transmission power in a CDMA cellular mobile telephone system.
Zehavi Ephraim (Haifa ILX) Carter Stephen S. (San Diego CA) Gilhousen Klein S. (Bozeman MT), Method and apparatus for using full spectrum transmitted power in a spread spectrum communication system for tracking in.
Padovani Roberto (San Diego CA) Ziv Noam (San Diego CA), Method and system for the dynamic modification of control paremeters in a transmitter power control system.
Emmons, Jr., Thomas Peter; Startup, James; Peters, Robert Anthony, Methods and apparatus for providing multiple wireless communication services having different bit rates.
Martin Christopher B. ; Kornfeld Richard K. ; Gregory Sherman, Self-attenuating RF transceiver system using antenna and modem interfaces and cable link.
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.
Tan, Geroncio O.; Atri, Anuj; Flores, Mauricio J.; Gowda, Basavanna Vamadevappa; Heeschen, David R.; Leizerovich, Gustavo D.; Patil, Prabhu V., Method and apparatus for controlling power among modems in a multi-mode mobile communication device.
Uehara, Glen S.; Gandhi, Dhiraj P.; Hartman, Robert A.; Nayar, Srikumar K.; Steele, Albert S.; Villa, Fred R., Method and system for managing communications for a multi-mode communications device.
Gandhi, Dhiraj; Bindinganavile, Vinuthananda; Dash, Biswajit; Hartman, Robert A., Multimodal phone data session management enhancement that alleviates dual transmission problems.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.