Telecommunications – Transmitter and receiver at separate stations – Plural transmitters or receivers
Patent
1995-11-30
1999-05-25
Urban, Edward F.
Telecommunications
Transmitter and receiver at separate stations
Plural transmitters or receivers
455524, 370508, 375356, H04B 7212
Patent
active
059078138
ABSTRACT:
A novel and improved method and apparatus for signal acquisition in a wireless telecommunication system having large transmission delay uncertainty is described. A terminal first acquires the forward link signal from a hub and extracts timing information from that forward link signal. Using the timing information the terminal estimates the time at which a next search window takes place during an access slot, and the time and pseudorandom code state necessary to transmit an access probe so as to arrive at during the search window assuming the terminal is located a maximum distance from the hub. The terminal proceeds to transmit additional access probes at times occurring one access slot period plus a delta time interval after the previous transmission. The delta time interval has a duration less than that of a search window associated with each access slot. Each access probe is processed with various transmission codes the states of which are incremented by an access slot period for each access probe transmitted.
REFERENCES:
patent: 4569042 (1986-02-01), Larson
patent: 4658096 (1987-04-01), West, Jr. et al.
patent: 4737975 (1988-04-01), Shafer
patent: 4901307 (1990-02-01), Gilhousen et al.
patent: 4922517 (1990-05-01), West, Jr. et al.
patent: 5056109 (1991-10-01), Gilhousen et al.
patent: 5101501 (1992-03-01), Gilhousen et al.
patent: 5109390 (1992-04-01), Gilhousen et al.
patent: 5109528 (1992-04-01), Uddenfeldt
patent: 5164958 (1992-11-01), Omura
patent: 5177765 (1993-01-01), Holland et al.
patent: 5184347 (1993-02-01), Farwell et al.
patent: 5235615 (1993-08-01), Omura
patent: 5257283 (1993-10-01), Gilhousen et al.
patent: 5265119 (1993-11-01), Gilhousen et al.
patent: 5267261 (1993-11-01), Blakeney, II et al.
patent: 5267262 (1993-11-01), Wheatley, III
patent: 5278892 (1994-01-01), Bolliger et al.
patent: 5295153 (1994-03-01), Gudmundson
patent: 5305308 (1994-04-01), English et al.
patent: 5317571 (1994-05-01), Marcel et al.
patent: 5327577 (1994-07-01), Uddenfeldt
patent: 5341397 (1994-08-01), Gudmundson
patent: 5416797 (1995-05-01), Gilhousen et al.
patent: 5420850 (1995-05-01), Umeda et al.
patent: 5432843 (1995-07-01), Bonta
patent: 5438565 (1995-08-01), Hemmady et al.
patent: 5617410 (1997-04-01), Matsumoto
Klein S. Gilhousen et al, "Increased Capacity Using CDMA for Mobile Satellite Communication", IEEE Journal On Selected Areas In Communications, vol. 8, No.4, May 1990, pp. 503-514.
TIA Document entitled "CDMA Intersystem Operations" by Alejandro Holcman et al. of QUALCOMM Incorporated, Presented at IEEE Conference on Vehicular Technology Committee in Stockholm, Sweden on Jun. 8, 1994, 5 pages.
TIA TR45.2 Intersystems Operations Presentation entitled "The Wideband Spread Spectrum Standard Under Development in TR45.5" by Edward G. Tiedemann, Jr. of QUALCOMM Incorporated, presented in Atlanta, Georgia, Nov. 16-20, 1992, 9 pages.
TIA Document entitled "Intersystem Operation With The Proposed Wideband Spread Spectrum Dual-Mode Mobile Station-Base Station Compatibility Standard" by Gadi Karmi et al. of QUALCOMM Incorporated, presented May 18, 1992 in Atlanta, Georgia, pp. 1-37.
TIA Document entitled "Alternative Methods For Inter-Channel Handoff" by Charles E. Wheatley, III of QUALCOMM Incorporated, presented on Nov. 10-20, 1992, in Atlanta, Georgia, pp. 1-3.
TIA Document entitled "Proposed Draft Liaison Statement to TR45.2" by Edward G. Tiedemann, Jr. of QUALCOMM Incorporated presented Dec. 3-11, 1992 in Phoenix, Arizona, pp. 1-32.
TIA Document entitled "Intersystem Issues For Support Of The Wideband Spread-Spectrum Digital Standard" by Gadi Karmi of QUALCOMM Incorporated presented Oct. 6, 1992 in Boston, Massachusetts, pp. 1-7.
TIA/EIA Telecommunications Systems Bulletin entitled "Cellular Radiotelecommunications Intersystem Operations: Authentication, Signaling Message Encryption and Voice Privacy", May 1993, 9 pages.
EIA/TIA interim Standard entitled "Cellular Radiotelecommunications Intersystem Operations: Intersystem Handoff", Dec. 1991, 18 pages.
TIA/EIA Telecommunications Systems Bulletin entitled "IS-41-B Mobile Border System Problems", Apr. 1994, 26 pages.
TIA/EIA Telecommunications Systems Bulletin entitled "IS-41-B Support for Dual Mode Wideband Spread Spectrum Mobile Stations", Jan. 1994, 14 pages.
TIA Document entitled "Soft Handoff Frame Format" by Edward G. Tiedemann, Jr. of QUALCOMM Incorporated presented Dec. 11-14, 1995 in Dallas, Texas, pp. 1-7.
Bayley Gwain
Hutchison, IV James A.
Johnson, Jr. Derald O.
Williamson Paul T.
Edmonston Brian S.
Miller Russell B.
Ogrod Gregory D.
Qualcomm Incorporated
Sobutka Philip J.
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