Method for improving capacity of a reverse link channel in a wireless network
View Patent ↗The capacity of a reverse link is improved by realizing a scheme to effect sharp changes in pilot channel transmit power (PCTP) and data channel to pilot power ratio (DCPR), coordinated with the start of the data channel transmission. The change in pilot power and data channel to pilot power ratio is also applicable to mobiles that use multiple pilots and/or multiple antennas at the transmitter and/or receiver.
1. A method in a wireless communication system comprising:
prior to the start of a scheduled data transmission on a data channel on a reverse link, transmitting information for controlling the power of a pilot on the reverse link to be used at the start of the scheduled data transmission, and transmitting information from which a data channel-to-pilot power ratio to be used during the scheduled data transmission can be determined, the information for controlling the power of the pilot channel and the information from which a data channel-to-pilot power ratio can be determined being based on measurements made at least in part in a latest measurement interval.
2. The method of claim 1 wherein the information for controlling the power of the pilot to be used at the start of the scheduled data transmission is an absolute power to be used.
3. The method of claim 1 wherein the information for controlling the power of the pilot to be used at the start of the scheduled data transmission is information for adjusting a pilot transmit power positively, negatively, or not at all.
4. The method of claim 3 wherein the information for adjusting the pilot power positively, negatively, or not at all is selected from a predefined set of a plurality of values.
5. The method of claim 3 where the adjustment is relative to a predefined datum value.
6. The method of claim 5 wherein the predefined datum value is specific to a transmission rate of the scheduled transmission.
7. The method of-any of claim 1 wherein the information from which a data channel-to-pilot channel power ratio can be determined is an absolute ratio to be used for the scheduled data transmission.
8. The method of claim 1 wherein the information from which a data channel-to-pilot channel power ratio can be determined is a positive, negative or zero offset from a default data channel-to-pilot ratio.
9. The method of claim 7 wherein the data channel-to-pilot channel power ratio is one of a predefined set of values.
10. The method of claim 8 wherein the default data channel-to-pilot ratio is specific to a transmission rate of the scheduled transmission.