Modified power control for Hybrid ARQ on the reverse link

• US 20070030820A1
• Filed: 10/10/2006
• Published: 02/08/2007
• Est. Priority Date: 01/10/2003
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Chen, Tao, Sarkar, Sandip, Tiedemann, Edward
• Application Number:
  US11/545,955
• Publication Number:
  US 20070030820A1
• Time in Patent Office: Days
• US Class Current: 370/315
• CPC Class Codes: H04W 52/40 during macro-diversity or soft handoff
• CPC Class Codes: H04W 52/48 during retransmission after error or non-acknowledgment
• CPC Class Codes: H04W 52/50 at the moment of starting communication in a multiple access environment

Abstract

A method for power control in a wireless communication system. An initial transmission of a data frame in the reverse link is received, and a first energy level of the data frame is measured. An energy deficit in the first energy level is then measured if the first energy level is insufficient to correctly decode the data frame, so that when the data frame is retransmitted with a second energy level equal to a difference between the first energy level and the energy deficit, the data frame can be correctly decoded with combined energy of the first energy level and the second energy level.

Claims

1. A method of operating a remote terminal in a wireless communication system, the method comprising:

transmitting to a base station an initial transmission on a reverse link, the initial transmission including a reverse supplemental channel frame and a reverse pilot channel;

receiving a traffic-to-pilot ratio delta and a negative acknowledgement on a forward channel from the base station to enable the remote terminal to transmit a sufficient amount of energy on a retransmission to compensate for an energy deficit on the initial transmission of the reverse supplemental channel frame;

retransmitting the reverse supplemental channel frame with the sufficient amount of energy to compensate for the energy deficit on the initial transmission,

wherein the negative acknowledgement is received by the remote terminal only if the transmitted initial transmission of the reverse supplemental channel frame has enough energy such that, if combined with an energy of the retransmission of the reverse supplemental channel frame, the combined energy would be sufficient to permit correct decoding of the reverse supplemental channel frame by the base station.

2. A remote terminal for a wireless communication system, the remote terminal comprising:

means for transmitting to a base station an initial transmission on a reverse link, the initial transmission including a reverse supplemental channel frame and a reverse pilot channel;

means for receiving a traffic-to-pilot ratio delta and a negative acknowledgement on a forward channel from the base station to enable the remote terminal to transmit a sufficient amount of energy on a retransmission to compensate for an energy deficit on the initial transmission of the reverse supplemental channel frame;

means for retransmitting the reverse supplemental channel frame with the sufficient amount of energy to compensate for the energy deficit on the initial transmission,

wherein the negative acknowledgement is received by the remote terminal only if the transmitted initial transmission of the reverse supplemental channel frame has enough energy such that, if combined with an energy of the retransmission of the reverse supplemental channel frame, the combined energy would be sufficient to permit correct decoding of the reverse supplemental channel frame by the base station.

3. A remote terminal for a wireless communication system, the remote terminal comprising:

a transmitter configured to transmit to a base station an initial transmission on a reverse link, the initial transmission including a reverse supplemental channel frame and a reverse pilot channel;

a receiver configured to receive a traffic-to-pilot ratio delta and a negative acknowledgement on a forward channel from the base station to enable the remote terminal to transmit a sufficient amount of energy on a retransmission to compensate for an energy deficit on the initial transmission of the reverse supplemental channel frame;

the transmitter further configured to retransmit the reverse supplemental channel frame with the sufficient amount of energy to compensate for the energy deficit on the initial transmission,

wherein the negative acknowledgement is received by the remote terminal only if the transmitted initial transmission of the reverse supplemental channel frame has enough energy such that, if combined with an energy of the retransmission of the reverse supplemental channel frame, the combined energy would be sufficient to permit correct decoding of the reverse supplemental channel frame by the base station.

4. A method of operating a remote terminal in a wireless communication system, the method comprising:

transmitting to a base station an initial transmission on a reverse link, the initial transmission including a reverse supplemental channel frame;

and if the remote terminal does not receive an acknowledgement signal or a negative acknowledgement signal from the base station based on the initial transmission of the reverse supplemental channel frame;

retransmitting the reverse supplemental channel frame with a default transmission level sufficient to permit correct decoding by the base station.

5. The method of claim 4, wherein the default transmission level is predetermined.

6. The method of claim 4, wherein the default transmission level is dynamically determined in accordance with a transmission condition of the wireless communication system.

7. A remote terminal for a wireless communication system, the remote terminal comprising:

means for transmitting to a base station an initial transmission on a reverse link, the initial transmission including a reverse supplemental channel frame; and

means for retransmitting the reverse supplemental channel frame with a default transmission level sufficient to permit correct decoding by the base station if the remote terminal does not receive an acknowledgement signal or a negative acknowledgement signal from the base station based on the initial transmission of the reverse supplemental channel frame.

8. The remote terminal of claim 7, wherein the default transmission level is predetermined.

9. The remote terminal of claim 7, wherein the default transmission level is dynamically determined in accordance with a transmission condition of the wireless communication system.

10. A remote terminal for a wireless communication system, the remote terminal comprising:

a transmitter configured to;

transmit to a base station an initial transmission on a reverse link, the initial transmission including a reverse supplemental channel frame; and

retransmit the reverse supplemental channel frame with a default transmission level sufficient to permit correct decoding by the base station if the remote terminal does not receive an acknowledgement signal or a negative acknowledgement signal from the base station based on the initial transmission of the reverse supplemental channel frame.

11. The remote terminal of claim 10, wherein the default transmission level is predetermined.

12. The remote terminal of claim 10, wherein the default transmission level is dynamically determined in accordance with a transmission condition of the wireless communication system.