Apparatus and an associated method for facilitating communications in a radio communication system that provides for data communications at multiple data rates
View Patent ↗Apparatus, and an associated method, for facilitating operation of a radio communication system that provides for multi rate data communications, such as a CDMA 2000 system that provides for 1×EV-DV communication services. A supplemental pilot, or control, signal generator embodied at a mobile station generates a supplemental pilot, or control, signal that is sent on a newly defined supplemental pilot, or control, channel. As the data rates of data communicated upon a reverse supplemental channel changes, corresponding changes are made to the power level of the reverse supplemental pilot, or control, signal.
1. A method comprising:
receiving a pilot signal on a reverse pilot channel and a supplemental pilot signal on a reverse supplemental pilot channel;
receiving data on a reverse data channel, wherein a power level of the received supplemental pilot signal varies based on variations in a data rate on the reverse data channel; and
demodulating the reverse data channel in a coherent manner based on the pilot signal and the supplemental pilot signal.
2. The method of claim 1 , further comprising performing outer loop power control based upon the reverse pilot channel and the reverse supplemental pilot channel.
3. The method of claim 2 , wherein the reverse pilot channel and the reverse supplemental pilot channel each include a reverse power control subchannel.
4. The method of claim 3 , wherein the reverse power control subchannel in the reverse pilot channel includes a reverse fast rate indicator providing an indication of the data rate on the reverse data channel, wherein the performing of outer loop power control is based on the reverse fast rate indicator.
5. The method of claim 4 , further comprising:
during a first time frame, maintaining outer loop power control thresholds; and
during a second time frame following the first time frame, adjusting the outer loop power control thresholds based on the indication of the data rate on the reverse data channel provided in the reverse fast rate indicator.
6. The method of claim 5 , wherein the variations in the data rate occurred during the first time frame.
7. The method of claim 1 , further comprising:
performing outer loop power control based upon a traffic-to-pilot ratio of the reverse data channel.
8. The method of claim 1 , wherein the power level of the received supplemental pilot signal is generated in response to the data rate on the reverse data channel exceeding a predetermined target level data rate.
9. The method of claim 8 , wherein the pilot signal has a constant power level.
10. An apparatus comprising:
a receiver circuit configured to receive a reverse pilot channel including a pilot signal, a reverse supplemental pilot channel including a supplemental pilot signal, and data on a reverse data channel including modulated data, wherein a power level of the supplemental pilot signal is adjusted based on variations in a data rate on the reverse data channel; and
a demodulator configured to demodulate the data on the reverse data channel in a coherent manner based on the pilot signal and the supplemental pilot signal.
11. The apparatus of claim 10 , further comprising power control circuitry configured to perform outer loop power control based upon the reverse pilot channel and the reverse supplemental pilot channel.
12. The apparatus of claim 11 , wherein the reverse pilot channel and the reverse supplemental pilot channel each include a reverse power control subchannel.
13. The apparatus of claim 12 , wherein the reverse power control subchannel in the reverse pilot channel includes a reverse fast rate indicator providing an indication of the data rate on the reverse data channel, wherein the power control circuitry is configured to perform the outer loop power control based on the reverse fast rate indicator.
14. The apparatus of claim 13 , wherein the power control circuity is configured to, during a first time frame, maintain outer loop power control thresholds and, during a second time frame following the first time frame, adjust the outer loop power control thresholds based on the indication of the data rate on the reverse data channel provided in the reverse fast rate indicator.
15. The apparatus of claim 14 , wherein the variations in the data rate occurred during the first time frame.
16. The apparatus of claim 10 , further comprising power control circuitry configured to perform outer loop power control based upon a traffic-to-pilot ratio of the reverse data channel.
17. The apparatus of claim 10 , wherein the power level of the supplemental pilot signal is generated in response to the data rate on the reverse data channel exceeding a predetermined target level data rate.
18. The apparatus of claim 17 , wherein the pilot signal has a constant power level.