HARQ ACK/NAK coding for a communication device during soft handoff
AssigneeMotorola, Inc.
InventorsRobert T. Love, Amativa Ghosh, Ravi Kuchibhotla, Kenneth A. Stewart, Nicholas W. Whinnett
Life of this patent
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Abstract
A method for rate selection by a communication device for enhanced uplink during soft handoff in a wireless communication system includes a first step of receiving information from a scheduler. This information can include one or more of scheduling, a rate limit, a power margin limit, and a persistence. A next step includes determining a data rate for an enhanced uplink during soft handoff using the information. A next step includes transmitting to a serving base station on an enhanced uplink channel at the data rate determined from the determining step.
Claims19
A method in a mobile station for improving uplink performance, the method comprising the steps of:
- receiving at least one downlink ACK/NAK transmission;
- discriminating between ACK/NAK transmissions meant for the mobile station and ACK/NAK transmissions meant for other communication devices by applying coded bits that uniquely associate ACK/NAK transmissions with the mobile station;
- and
- utilizing the information in the ACK/NAK transmission coded for the mobile station in determining uplink transmission activity,
- the method further comprising the step of using one ACK/NAK channel in a first set of ACK/NAK channels if a first BTS schedules the mobile station and optionally using one ACK/NAK channel in a second set of ACK/NAK channels by the first BTS if other than the first BTS schedules the mobile station.
A method for improving uplink performance for a communication device in a wireless communication system, the method comprising steps of:
- defining coded bits that uniquely identify a particular communication device;
- applying the coded bits to a downlink ACK/NAK transmission in a downlink ACK/NAK code channel that can be received by a plurality of communication devices;
- discriminating between ACK/NAK transmissions meant for the particular communication device and ACK/NAK transmissions meant for other communication devices using the coded bits from the applying step;
- and
- utilizing the information in the ACK/NAK transmission coded for the particular communication device in determining uplink transmission activity,
- the method further composing the step of using one ACK/NAK channel in a first set of ACK/NAK channels if a first BTS schedules the mobile station and optionally using one ACK/NAK channel in a second set of ACK/NAK channels by the first BTS if other than the first BTS schedules the mobile station.
A method for improving uplink performance during soft handoff of a communication device, the method comprising steps of:
- defining coded bits that uniquely identify a particular communication device;
- applying the coded bits to a downlink ACK/NAK transmission in a downlink ACK/NAK code channel that can be received by a plurality of communication devices;
- discriminating between ACK/NAK transmissions meant for the particular communication device and ACK/NAK transmissions meant for other communication devices using the coded bits from the applying step;
- allocating two sets of ACK/NAK channels for at least a first BTS;
- and
- using one ACK/NAK channel in a first set of ACK/NAK channels to communicate with the first BTS if the first BTS schedules the communication device and optionally using one ACK/NAK channel in a second set of ACK/NAK channels to communicate with the first BTS if other than the first BTS schedules the communication device.
A method for improving uplink performance for a first communication device during soft handoff in a communication system, the method comprising steps of:
- receiving ACK/NAK transmissions in a downlink ACK/NAK code channel;
- discriminating between ACK/NAK transmissions meant for the first communication device and ACK/NAK transmissions meant for other communication devices using coded bits that uniquely identify the particular communication device;
- receiving an allocation of two sets of ACK/NAK channels for a first base station;
- and
- using one ACK/NAK channel in a first set of the two sets of ACK/NAK channels if the first base station schedules the first communication device and optionally using one ACK/NAK channel in a second set of the two sets of ACK/NAK channels if other than the first base station schedules the first communications device.
Dependencies are inferred from the claim text.