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US Patent 5455822 - Method and apparatus for establishing spread spectrum communication
US Patent Issued on October 3, 1995
Estimated Patent Expiration Date:
December 3, 2013Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
December 3, 2013Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractA method for establishing communications between a master unit and a plurality of node units. Of the plurality of node units, K node units are assumed to have established communications with a master unit. A first (K+1) node unit of the plurality of node units, desires to establish communications with the master unit. The method includes transmitting from the master unit, a base-station spread spectrum signal having a common signalling chip code, transmitting from the first node unit a second spread spectrum signal with a first identification code using the common-signalling chip code, transmitting from the master unit a third spread spectrum signal with a master unit identification code, using the common-signalling chip code. The method further includes generating at the first node unit using the master unit identification signal, a master unit chip code for transmitting spread spectrum signals to the master unit. Additionally, the method includes generating, at the master unit using the first identification code, a first node unit chip code for transmitting spread spectrum signals to the first node unit.Other References
| InventorsAssigneeApplicationNo. 161187 filed on 12/03/1993US Classes:370/342, Combining or distributing information via code word channels using multiple access techniques (e.g., CDMA)370/347, Multiple access (e.g., TDMA)375/130, SPREAD SPECTRUM455/507Central station (e.g., master, etc.)Field of Search380/44, Having particular key generator340/825.52AddressingExaminersPrimary: Kizou, HassanAttorney, Agent or FirmUS Patent References27738, 3934203, Spread spectrum modemIssued on: 01/20/1976 Inventor: Schiff3978436, Surface acoustic wave device and method of making same Issued on: 08/31/1976 Inventor: Alig , et al.4021898, Method of adjusting the frequency of vibration of piezoelectric resonators Issued on: 05/10/1977 Inventor: Willis , et al.4051448, Surface acoustic wave transmission device and method of manufacturing same Issued on: 09/27/1977 Inventor: Coussot4100498, Discrete chirp frequency synthesizer Issued on: 07/11/1978 Inventor: Alsup , et al.4131484, Frequency adjusting a 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Schwartz4807222, Cordless accessed high-speed high-capacity local area networks Issued on: 02/21/1989 Inventor: Amitay4813057, Time domain radio transmission system Issued on: 03/14/1989 Inventor: Fullerton4815106, Power line communication apparatus Issued on: 03/21/1989 Inventor: Propp , et al.4833702, Telephone registration and cancellation control in a wide area cordless telephone system Issued on: 05/23/1989 Inventor: Shitara , et al.4837786, Technique for mitigating rain fading in a satellite communications system using quadrature phase shift keying Issued on: 06/06/1989 Inventor: Gurantz , et al.4837802, Radio communication method and system Issued on: 06/06/1989 Inventor: Higashiyama , et al.4860307, Synchronization pulse generator in spread spectrum communication system Issued on: 08/22/1989 Inventor: Nakayama4866732, Wireless telephone system Issued on: 09/12/1989 Inventor: Carey , et al.4878238, Cordless telephone network Issued on: 10/31/1989 Inventor: Rash, et al.4893327, Colocated cellular radiotelephone systems Issued on: 01/09/1990 Inventor: Stern, et al.4894842, Precorrelation digital spread spectrum receiver Issued on: 01/16/1990 Inventor: Broekhoven, et al.4901307, Spread spectrum multiple access communication system using satellite or terrestrial repeaters Issued on: 02/13/1990 Inventor: Gilhousen, et al.4905221, Earth station capable of effectively using a frequency band of a satellite Issued on: 02/27/1990 Inventor: Ichiyoshi4918689, Asynchronous communication system Issued on: 04/17/1990 Inventor: Hui4918690, Network and intelligent cell for providing sensing, bidirectional communications and control Issued on: 04/17/1990 Inventor: Markkula, Jr., et al.4943973, Spread-spectrum identification signal for communications system Issued on: 07/24/1990 Inventor: Werner4965759, Spread-spectrum receiver Issued on: 10/23/1990 Inventor: Uchida, et al.4979186, Time domain radio transmission system Issued on: 12/18/1990 Inventor: Fullerton4995083, Method 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