Reservation multiple access

• US 20060040702A1
• Filed: 10/17/2005
• Published: 02/23/2006
• Est. Priority Date: 10/15/1998
• Status: Active Grant

• Current Assignee: Rod J. Walton, Serge Willenegger, Vieri Vanghi
• Original Assignee: Rod J. Walton, Serge Willenegger, Vieri Vanghi
• Inventors: Vanghi, Vieri, Willenegger, Serge, Walton, Rod J.
• Granted Patent: US 7,613,462 B2
• Time in Patent Office: Days
• US Class Current: 455/525
• CPC Class Codes: H04W 52/223 predicting future states of the transmission
• CPC Class Codes: H04W 52/32 TPC of broadcast or control channels
• CPC Class Codes: H04W 52/50 at the moment of starting communication in a multiple access environment
• CPC Class Codes: H04W 52/60 using different transmission rates for TPC commands
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/002 Transmission of channel access control information
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 74/0866 using a dedicated channel for access

Abstract

A mobile station accesses a base station by randomly selecting a first reverse link common control channel from a set of random access channels. The mobile station transmits a request portion of an access probe over the first reverse link common control channel. The request portion is subject to collision with other signals. The request portion comprises a hash identification which is derived from a uniquely identifying number using a hash function. The hash identification quasi-uniquely identifies the mobile station. The mobile station receives a channel assignment message from the base station designating the hash identification and a reserved access channel. The reserved access channel provides communication with a low probability of contention. The mobile station transmits a message portion of the access probe over the reserved access channel.

Claims

1. A method for accessing a base station from a mobile station in a communication system, comprising:

selecting a signature sequence from a plurality of signature sequences;

modulating said selected signature sequence with a request portion of an access probe;

transmitting said modulated request portion over a reverse link common control channel;

receiving a channel assignment message from said base station designating a reserved access channel, said reserved access channel providing communication with a low probability of contention and said channel assignment message reflecting said selected signature;

transmitting a message portion of said access probe over said reserved access channel;

receiving a power control command over a forward link channel associated with said reserved access channel; and

responding to said power control command by increasing or decreasing a power level at which said mobile station transmits said message portion.