Power control protocol for highly variable data rate reverse link of a wireless communication system

• US 9,363,759 B2
• Filed: 08/23/2013
• Issued: 06/07/2016
• Est. Priority Date: 09/21/1998
• Status: Expired due to Fees

• Current Assignee: IPR Licensing Incorporated (InterDigital, Inc.)
• Original Assignee: IPR Licensing Incorporated (InterDigital, Inc.)
• Inventors: Proctor, James A.
• Primary Examiner(s): Harper, Kevin C
• Application Number:
  US13/974,697
• Publication Number:
  US 20130343354A1
• Time in Patent Office: 1,019 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04B 7/2628 using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA] H04B7/2618 takes precedence
• CPC Class Codes: H04W 52/04 TPC
• CPC Class Codes: H04W 52/08 Closed loop power control
• CPC Class Codes: H04W 52/143 Downlink power control
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/287 when the channel is in stand-by
• CPC Class Codes: H04W 52/288 taking into account the usage mode, e.g. hands-free, data transmission, telephone
• CPC Class Codes: H04W 52/50 at the moment of starting communication in a multiple access environment
• CPC Class Codes: H04W 52/58 Format of the TPC bits

Abstract

A subscriber unit performs power control of a reverse link by sending heartbeat messages to a base station, permitting the base station to determine a reverse link quality report. Using a reverse link quality report message received from the base station, the subscriber unit calculates its reverse power level and maintains the reverse power level during the standby state.

Claims

1. A base station comprising:

circuitry configured to receive first traffic data from a subscriber unit;

the circuitry is further configured to transmit control information;

the circuitry, in response to the subscriber unit not having traffic data to send, is further configured to receive a periodically transmitted first channel without traffic data in time intervals;

wherein the transmitted control information includes an indication of the time intervals for the subscriber unit to transmit the first channel;

the circuitry, in response to the received first channel, is further configured to transmit power commands to the subscriber unit to adjust a transmission power level of the first channel; and

the circuitry is further configured to receive second traffic data after receiving the periodically transmitted first channel;

wherein a transmission power level of the received second traffic data is based on the power commands transmitted in response to the first channel.

2. The base station of claim 1 wherein each time interval is at least one time slot.

3. The base station of claim 1 wherein the circuitry is further configured to transmit a grant to the subscriber unit;

wherein the second traffic data is received in response to the grant.

4. The base station of claim 1 wherein the first channel is a single code channel.

5. A method comprising:

receiving, by a base station, first traffic data from a subscriber unit;

transmitting, by the base station, control information;

in response to the subscriber unit not having traffic data to send, receiving, by the base station a periodically transmitted first channel without traffic data in time intervals;

wherein the transmitted control information includes an indication of the time intervals for the subscriber unit to transmit the first channel;

in response to the received first channel, transmitting, by the base station, power commands to the subscriber unit to adjust a transmission power level of the first channel; and

receiving, by the base station, second traffic data after receiving the periodically transmitted first channel;

wherein a transmission power level of the received second traffic data is based on the power commands transmitted in response to the first channel.

6. The method of claim 5 wherein each time interval is at least one time slot.

7. The method of claim 5 wherein transmitting, by the base station, a grant to the subscriber unit;

wherein the second traffic data is received in response to the grant.

8. The method of claim 5 wherein the first channel is a single code channel.

9. A subscriber unit comprising:

at least one component configured to receive control information;

the at least one component is further configured in response to the subscriber unit not having traffic data to send, to periodically transmit a first channel without traffic data in time intervals;

wherein the period for transmitting the first channel is determined from the received control information;

the at least one component is further configured to receive power commands in response to the transmitted first channel and adjust a transmission power level of the transmitted first channel in response to the receive power commands; and

the at least one component is further configured to transmit traffic data after the periodically transmitting the first channel;

wherein a transmission power level of the transmitted traffic data is based on the power commands received in response to the first channel.

10. The subscriber unit of claim 9 wherein each time interval is at least one time slot.

11. The subscriber unit of claim 9 wherein the transmitting the traffic data is in response to receiving a grant from the base station.

12. The subscriber unit of claim 9 wherein the first channel is a single code channel.