United States Patent 7,602,749
Proctor, Jr. October 13, 2009
Fast acquisition of traffic channels for a highly variable data rate reverse link of a CDMA wireless communication system
Abstract
A service option overlay for a CDMA wireless communication in which multiple allocatable subchannels are defined on a reverse link by assigning different code phases of a given long pseudonoise (PN) code to each subchannel. The instantaneous bandwidth needs of each on-line subscriber unit are then met by dynamically allocating none, one, or multiple subchannels on an as needed basis for each network layer connection. The system efficiently provides a relatively large number of virtual physical connections between the subscriber units and the base stations on the reverse link for extended idle periods such as when computers connected to the subscriber units are powered on, but not presently actively sending or receiving data. These maintenance subchannels permit the base station and the subscriber units to remain in phase and time synchronism. This in turn allows fast acquisition of additional subchannels as needed by allocating new code phase subchannels. Preferably, the code phases of the new channels are assigned according to a predetermined code phase relationship with respect to the code phase of the corresponding maintenance subchannel.
Inventors: Proctor, Jr.; James A. (Indialantic, FL)
Assignee: InterDigital Corporation (Wilmington, DE)
Appl. No.: 10/179,121
Filed: June 24, 2002
Related U.S. Patent Documents
Application Number Filing Date Patent Number Issue Date
09515487 Feb., 2000 6452913
09088413 Jun., 1998 6222832
Current U.S. Class: 370/335 ; 370/342; 370/441
Current International Class: H04B 7/216 (20060101)
News 
Market Data 
Discover 
