Fast acquisition of traffic channels for a highly variable data rate reverse link of a CDMA wireless communication system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04J-003/16
H04J-013/00
출원번호
US-0761130
(2004-01-20)
§371/§102 date
20000714
(20000714)
발명자
/ 주소
Proctor, Jr., James A.
출원인 / 주소
Tantivy Communications, Inc.
대리인 / 주소
Allen, Dyer, Doppelt, Milbrath &
인용정보
피인용 횟수 :
2인용 특허 :
51
초록▼
A method for monitoring idling mode connections between a base station and idling subscriber units that are powered on, but not actively sending data, is provided. The method includes making available a plurality of orthogonal subchannels within at least one Code Division Multiple Access (CDMA) radi
A method for monitoring idling mode connections between a base station and idling subscriber units that are powered on, but not actively sending data, is provided. The method includes making available a plurality of orthogonal subchannels within at least one Code Division Multiple Access (CDMA) radio frequency (RF) channel. A shared orthogonal subchannel is assigned to at least two different idling subscriber units, but utilizing different time slots of the shared orthogonal subchannels. For each idling subscriber unit assigned the shared orthogonal subchannel, a respective heartbeat signal is sent within its assigned time slot at a data rate that is low enough to maintain bit synchronization with the base station. The respective heartbeat signals are tracked within the assigned time slots by selecting an assigned time slot within the shared orthogonal subchannel, retrieving a previous tracking of a respective heartbeat signal for an idling subscriber unit associated with the assigned time slot, determining a current tracking of the respective heartbeat signal for the idling subscriber unit associated with the assigned time slot, and updating the tracking of the idling subscriber unit associated with the assigned time slot based upon its current and previous trackings.
대표청구항▼
1. A method for monitoring on a reverse link idling mode connections between a base station and a plurality of idling subscriber units that are powered on, but not actively sending data, the method comprising:making available a plurality of orthogonal subchannels within at least one Code Division Mu
1. A method for monitoring on a reverse link idling mode connections between a base station and a plurality of idling subscriber units that are powered on, but not actively sending data, the method comprising:making available a plurality of orthogonal subchannels within at least one Code Division Multiple Access (CDMA) radio frequency (RF) channel; assigning a shared orthogonal subchannel to at least two different idling subscriber units, but utilizing different time slots of the shared orthogonal subchannels; for each idling subscriber unit assigned the shared orthogonal subchannel, sending a respective heartbeat signal within its assigned time slot at a data rate that is low enough to maintain bit synchronization with the base station; and tracking the respective heartbeat signals within the assigned time slots by selecting an assigned time slot within the shared orthogonal subchannel, retrieving a previous tracking of a respective heartbeat signal for an idling subscriber unit associated with the assigned time slot, determining a current tracking of the respective heartbeat signal for the idling subscriber unit associated with the assigned time slot, updating the tracking of the idling subscriber unit associated with the assigned time slot based upon its current and previous trackings, storing the updated tracking for the idling subscriber unit associated with the assigned time slot, and selecting a next assigned time slot within the shared orthogonal subchannel, and repeating the retrieving, determining, updating and storing for a different idling subscriber unit associated with the next selected assigned time slot. 2. A method according to claim 1 wherein for a first time tracking of the respective heartbeat signals within the assigned time slots, the previous tracking is a default tracking.3. A method according to claim 1 wherein the base station assigns the shared orthogonal subchannel.4. A method according to claim 1 wherein the different time slots of the shared orthogonal subchannel are uniquely assigned.5. A method according to claim 4 wherein each idling subscriber unit sends the heartbeat signal in its uniquely assigned time slot.6. A method according to claim 4 wherein an idling subscriber unit enters an active mode by sending a command signal to the base station using its uniquely assigned time slot to request allocation of additional available orthogonal subchannels.7. A method according to claim 1 wherein the base station sends feedback to each idling subscriber unit relating to an adjustment of its transmit timing.8. A method according to claim 1 wherein the base station sends feedback to each idling subscriber unit relating to an adjustment of its transmit power.9. A method according to claim 1 wherein the base station comprises a code correlator for tracking the respective heartbeat signals within the assigned time slots of the shared orthogonal subchannel.10. A method according to claim 1 wherein the base station comprises an early-late correlator for tracking the respective heartbeat signals within the assigned time slots of the shared orthogonal subchannel.11. A method for monitoring idling mode connections between a base station and a plurality of idling subscriber units that are powered on, but not actively sending data, the method comprising:making available a plurality of orthogonal subchannels within at least one Code Division Multiple Access (CDMA) radio frequency (RF) channel; assigning a shared orthogonal subchannel to at least two different idling subscriber units, but utilizing different time slots of the shared orthogonal subchannels; for each idling subscriber unit assigned the shared orthogonal subchannel, sending a respective heartbeat signal within its assigned time slot at a data rate that is low enough to maintain bit synchronization with the base station; and tracking the respective heartbeat signals within the assigned time slots by selecting an assigned time slot within the shared orthogonal subchannel, retrieving a previous tracking of a respective heartbeat signal for an idling subscriber unit associated with the assigned time slot, determining a current tracking of the respective heartbeat signal for the idling subscriber unit associated with the assigned time slot, and updating the tracking of the idling subscriber unit associated with the assigned time slot based upon its current and previous trackings. 12. A method according to claim 11 wherein tracking the respective heartbeat signals further comprises storing the updated tracking for the idling subscriber unit associated with the assigned time slot.13. A method according to claim 12 wherein tracking the respective heartbeat signals further comprises selecting a next assigned time slot within the shared orthogonal subchannel, and repeating the retrieving, determining, updating and storing for a different idling subscriber unit associated with the next selected assigned time slot.14. A method according to claim 11 wherein for a first time tracking of the respective heartbeat signals within the assigned time slots, the previous tracking is a default tracking.15. A method according to claim 11 wherein the base station assigns the shared orthogonal subchannel.16. A method according to claim 11 wherein the different time slots of the shared orthogonal subchannel are uniquely assigned.17. A method according to claim 16 wherein each idling subscriber unit sends the heartbeat signal in its uniquely assigned time slot.18. A method according to claim 16 wherein an idling subscriber unit enters an active mode by sending a command signal to the base station using its uniquely assigned time slot to request allocation of additional available orthogonal subchannels.19. A method according to claim 11 wherein the base station sends feedback to each idling subscriber unit relating to an adjustment of its transmit timing.20. A method according to claim 11 wherein the base station sends feedback to each idling subscriber unit relating to an adjustment of its transmit power.21. A method according to claim 11 wherein the base station comprises a code-correlator for tracking the respective heartbeat signals within the assigned time slots of the shared orthogonal subchannel.22. A method according to claim 11 wherein the base station comprises an early-late correlator for tracking the respective heartbeat signals within the assigned time slots of the shared orthogonal subchannel.23. A base station comprising:a plurality of Code Division Multiple Access (CDMA) transceivers; and a bandwidth management circuit connected to said plurality of CDMA transceivers for monitoring idling mode connections with a plurality of idling subscriber units that are powered on, but not actively sending data, said bandwidth management circuit making available a plurality of orthogonal subchannels within at least one CDMA radio frequency (RF) channel, assigning a shared orthogonal subchannel to at least two different idling subscriber units, but utilizing different time slots of the shared orthogonal subchannel, receiving from each idling subscriber unit assigned the shared orthogonal subchannel, a respective heartbeat signal within its assigned time slot at a data rate that is low enough to maintain bit synchronization with the base station, and tracking the respective heartbeat signals within the assigned time slots by selecting an assigned time slot within the shared orthogonal subchannel, retrieving a previous tracking of a respective heartbeat signal for an idling subscriber unit associated with the assigned time slot, determining a current tracking of the respective heartbeat signal for the idling subscriber unit associated with the assigned time slot, and updating the tracking of the idling subscriber unit associated with the assigned time slot based upon its current and previous trackings. 24. A base station according to claim 23 wherein tracking the respective heartbeat signals by said bandwidth management circuit further comprises storing the updated tracking for the idling subscriber unit associated with the assigned time slot.25. A base station according to claim 24 wherein tracking the respective heartbeat signals by said bandwidth management circuit further comprises selecting a next assigned time slot within the shared orthogonal subchannel, and repeating the retrieving, determining, updating and storing for a different idling subscriber unit associated with the next selected assigned time slot.26. A base station according to claim 23 wherein for a first time tracking of the respective heartbeat signals within the assigned time slots by said bandwidth management circuit, the previous tracking is a default tracking.27. A base station according to claim 23 wherein the different time slots of the shared orthogonal subchannel are uniquely assigned.28. A base station according to claim 27 wherein each idling subscriber unit sends the heartbeat signal in its uniquely assigned time slot.29. A base station according to claim 23 wherein one of said plurality of CDMA transceivers sends feedback to each idling subscriber unit relating to an adjustment of its transmit timing.30. A base station according to claim 23 wherein one of said plurality of CDMA transceivers sends feedback to each idling subscriber unit relating to an adjustment of its transmit power.31. A base station according to claim 23 wherein said bandwidth management circuit comprises a code-correlator for tracking the respective heartbeat signals within the assigned time slots of the shared orthogonal subchannel.32. A base station according to claim 23 wherein said bandwidth management circuit comprises an early-late correlator for tracking the respective heartbeat signals within the assigned time slots of the shared orthogonal subchannel.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (51)
Schwaller John (1358 Buffing Cir. Palm Bay FL 32909), Adaptive distribution system for transmitting wideband video data over narrowband multichannel wireless communication sy.
Rudrapatna Ashok N. (Basking Ridge NJ) Jaisingh Gopal K. (Montville NJ) Miller ; II Robert R. (Morris Township ; Morris County NJ) Russell Jesse E. (Piscataway NJ) Schroeder Robert E. (Morris Townshi, Broadband wireless system and network architecture providing broadband/narrowband service with optimal static and dynami.
Press Harry B. (Sandy UT) Giallorenzi Thomas R. (Salt Lake City UT) Rafter Mark T. (Park City UT), CDMA communication system in which bit rates are dynamically allocated.
Hakkinen Hannu,FIX ; Keurulainen Jere,FIX ; Honkasalo Zhi-Chun,FIX ; Virtanen Anu,FIX ; Rinne Mikko,FIX, Connection establishment method and radio system.
Jalali Ahmad ; Krzymien Witold,CAX ; Mermelstein Paul,CAX, Medium access control scheme for data transmission on code division multiple access (CDMA) wireless systems.
Zehavi Ephraim (San Diego CA), Method and apparatus for bifurcating signal transmission over in-phase and quadrature phase spread spectrum communicatio.
Samir S. Soliman, Method and apparatus for determining position location using reduced number of GPS satellites and synchronized and unsynchronized base stations.
Scribano Gino A. (Elk Grove Village IL) Proctor Lee M. (Cary IL) Nguyen Quoc V. (Lake Zurich IL), Method and apparatus for packet alignment in a communication system.
Hall Scott Maurice ; Warner Shawn Allison ; Krzystyniak Michael Anthony, Method and apparatus for providing a time adjustment to a wireless communication system.
Bruckert Eugene J. (Arlington Heights IL) Sonnentag Richard A. (Lake Zurich IL), Method and apparatus for time aligning signals for reception in a code-division multiple access communication system.
Tiedemann ; Jr. Edward G. ; Terasawa Daisuke ; Sarkar Sandip ; Jou Yu-Cheun ; Odenwalder Joseph P. ; Shanbhag Abihijit ; Willenegger Serge,CHX, Method and system for handoff between an asynchronous CDMA base station and a synchronous CDMA base station.
Sereno Daniele (Turin ITX) Hellwig Karl (Nrnberg DEX) Berruto Ermanno (Turin ITX), Method of controlling transmission on a same radio channel of variable-rate information streams in radio communication s.
Dunn Michael Jeffrey ; Atherly Don Harold ; Reudink Douglas Otto John ; Feuerstein Martin Jay ; Foerster Ronald Ernest ; Chuang Ching ; Vendetti Dino John, Signal time of arrival position determining method for calculating cellular telephone billing charges.
Panech Eric (Givataiim ILX) Handzel Mark J. (San Diego CA) Morley Steven Allan (San Diego CA) Avis Graham M. (San Diego CA), Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or.
Paneth Eric (Givataijm CA ILX) Handzel Mark J. (San Diego CA) Morley Steven A. (San Diego CA) Avis Graham M. (San Diego CA), Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or.
Paneth Eric (Givataijm CA ILX) Handzel Mark J. (San Diego CA) Morley Steven A. (San Diego CA) Avis Graham M. (San Diego CA), Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or.
Paneth Eric (Givataijm CA ILX) Handzel Mark J. (San Diego CA) Morley Steven A. (San Diego CA) Avis Graham M. (San Diego CA), Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or.
Paneth Eric (Givatiim ILX) Handzel Mark J. (San Diego CA) Morley Steven Allan (San Diego CA) Avis Graham M. (San Diego CA), Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or.
Paneth Eric (San Diego CA) Handzel Mark J. (San Diego CA) Morley Steven A. (San Diego CA) Avis Graham M. (San Diego CA), Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or.
Gilhousen Klein S. (San Diego CA) Jacobs Irwin M. (La Jolla CA) Padovani Roberto (San Diego CA) Weaver ; Jr. Lindsay A. (San Diego CA) Wheatley ; III Charles E. (Del Mar CA) Viterbi Andrew J. (La Jol, System and method for generating signal waveforms in a CDMA cellular telephone system.
Scott Logan, Timing adjustment control for efficient time division duplex, frequency division duplex or hybrid time division duplex/frequency division duplex communication.
Connolly David A. (Arlington Heights IL) Holt Lewis (Barrington IL) Westerhold Morris W. (Naperville IL) Zellner Samuel N. (Hoffman Estates IL) Ciannella ; Jr. Frank A. (South Holland IL) Czaplewski , Wireless digital personal communications system having voice/data/image two-way calling and intercell hand-off.
Cline William Keith (Naperville IL) Fuentes James Joseph (South Barrington IL), Wireless telecommunication system using protocol conversion for signaling between base stations and land based switches.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.