Reservation multiple access

In a communication system, a method of accessing a base station from a mobile station, comprising:

• selecting a first signature sequence from a plurality of signature sequences used by multiple mobile stations;
• transmitting a request portion of an access probe over a reverse link common control channel subject to contention, said access probe modulated with said signature sequence;
• 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 first signature;
• transmitting a message portion of said access probe over said reserved access channel, wherein said message portion comprises a call origination message;
• 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.

In a communication system, a method of accessing a base station from a mobile station, comprising:

• selecting a first signature sequence from a plurality of signature sequences used by multiple mobile stations;
• transmitting a request portion of an access probe over a reverse link common control channel subject to contention, said access probe modulated with said signature sequence;
• 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 first signature;
• transmitting a message portion of said access probe over said reserved access channel, wherein said message portion is longer than said request portion;
• 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.

In a communication system, a method of accessing a base station from a mobile station, comprising:

• selecting a first signature sequence from a plurality of signature sequences used by multiple mobile stations;
• transmitting a request portion of an access probe over a reverse link common control channel subject to contention, said access probe modulated with said signature sequence;
• 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 first signature and specifying a wait period to be observed;
• 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;
• responding to said power control command by increasing or decreasing a power level at which said mobile station transmits said message portion;
• and
• delaying said transmitting said message portion with reference to said wait period.

In a communication system, a method of accessing a base station from a mobile station, comprising:

• selecting a first signature sequence from a plurality of signature sequences used by multiple mobile stations;
• transmitting a request portion of an access probe over a reverse link common control channel subject to contention, said access probe modulated with said signature sequence;
• 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 first signature and specifying a power control information;
• 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;
• and
• determining a power level at which to transmit said message portion with reference to said power control information.

In a communication system, a method of accessing a base station from a mobile station, comprising:

• selecting a first signature sequence from a plurality of signature sequences used by multiple mobile stations;
• transmitting a request portion of an access probe over a reverse link common control channel subject to contention, said access probe modulated with said signature sequence;
• 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 first 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;
• receiving a message from said base station modulated with a predetermined sequence, said predetermined sequence reflecting a level of loading at said base station.

A mobile communication station, comprising:

• a controller configured to generate a first signature sequence from a plurality of signature sequences used by multiple mobile stations;
• a modulator coupled to said controller, said modulator being configured to modulate a request portion of an access probe with said first signature sequence and to modulate a message portion of said access probe;
• a radio frequency signal processing unit coupled to said modulator, said signal processing unit being configured to transmit said request portion over a forward link common control channel subject to contention and configured to receive a channel assignment message reflecting said first signature and a reserved access channel, said reserved access channel providing communication with a low probability of contention and configured to transmit said modulated message portion over said reserved access channel, said radio frequency signal processing unit comprising:
• a power control apparatus configured to receive a power control command over a forward link channel and configured to respond thereto by increasing or decreasing a power level at which said mobile station transmits said message portion;
• and
• a demodulator coupled to said radio frequency signal processing unit and said controller, said demodulator configured to demodulate said channel assignment message according to a second signature sequence associated with said first signature sequence.

A mobile communication station, comprising:

• a controller configured to generate a first signature sequence from a plurality of signature sequences used by multiple mobile stations;
• a modulator coupled to said controller, said modulator being configured to modulate a request portion of an access probe with said first signature sequence and to modulate a message portion of said access probe;
• a radio frequency signal processing unit coupled to said modulator, said signal processing unit being configured to transmit said request portion over a forward link common control channel subject to contention and configured to receive a channel assignment message reflecting said first signature and a reserved access channel, said reserved access channel providing communication with a low probability of contention and configured to transmit said modulated message portion over said reserved access channel, said radio frequency signal processing unit comprising:
• a power control apparatus configured to receive a power control command over a forward link channel and configured to respond thereto by increasing or decreasing a power level at which said mobile station transmits said message portion, wherein said radio frequency signal processing unit is further configured to receive said power control command from a plurality of sectors associated with a single base station;
• and
• a demodulator coupled to said radio frequency signal processing unit and said controller, said demodulator configured to demodulate said channel assignment message.

A method of communication system access, comprising:

• receiving a request portion of an access probe modulated with a first signature sequence selected from among a plurality of signature sequences which provide communication subject to contention;
• transmitting a channel assignment message designating said first signature sequence and a reserved access channel, said reserved access channel providing communication with a low probability of contention;
• receiving a message portion of said access probe over said reserved access channel from a mobile station, wherein said channel assignment message specifies a wait period to be observed before said receiving said message portion is executed;
• and
• transmitting a power control command over a forward link channel based upon a signal quality level at which said message portion is received during said receiving said message portion.

A method of communication system access, comprising:

• receiving a request portion of an access probe modulated with a first signature sequence selected from among a plurality of signature sequences which provide communication subject to contention;
• transmitting a channel assignment message designating said first signature sequence and a reserved access channel, said reserved access channel providing communication with a low probability of contention;
• receiving a message portion of said access probe over said reserved access channel from a mobile station;
• and
• transmitting a power control command over a forward link channel based upon a signal quality level at which said message portion is received during said receiving said message portion;
• determining a power correction amount based upon a signal quality level at which said request portion is received and wherein said channel assignment message specifies said power control correction amount to be used by said mobile station to transmit said message portion.

A method of communication system access, comprising:

• receiving a request portion of an access probe modulated with a first signature sequence selected from among a plurality of signature sequences which provide communication subject to contention;
• transmitting a channel assignment message designating said first signature sequence and a reserved access channel, said reserved access channel providing communication with a low probability of contention, and wherein said transmitting said channel assignment message includes modulating said channel assignment message with a second signature sequence, said second signature sequence associated with said first signature sequence;
• receiving a message portion of said access probe over said reserved access channel from a mobile station;
• and
• transmitting a power control command over a forward link channel based upon a signal quality level at which said message portion is received during said receiving said message portion.

A method of communication system access, comprising:

• receiving a request portion of an access probe modulated with a first signature sequence selected from among a plurality of signature sequences which provide communication subject to contention;
• transmitting a channel assignment message designating said first signature sequence and a reserved access channel, said reserved access channel providing communication with a low probability of contention;
• receiving a message portion of said access probe over said reserved access channel from a mobile station;
• transmitting a power control command over a forward link channel based upon a signal quality level at which said message portion is received during said receiving said message portion;
• and
• transmitting a loading message modulated with a spreading sequence which reflects a level of loading at a base station.