Power control of point to multipoint physical channels
Data is transmitted over a particular channel from a transmitter to a plurality of receivers. The particular channel is received at the plurality of receivers. Each of the receivers sends power control information to the transmitter based on a measured reception quality and the reception quality requirements of each receiver. The transmitter uses the power control information from each receiver and adjusts a transmission power level of the particular channel so that if any receiver requires an increase in the transmission power level to meet that receiver quality requirement, the transmission power level is increased and if all receivers exceed their quality requirement, the transmission power level is decreased.
1. A method for transferring data in a wireless communication system, the method comprising:
transmitting data over a particular channel from a transmitter to a plurality of receivers;
receiving power control information from each of the receivers based on a measured reception quality and a reception quality requirements of each receiver;
using the power control information from each receiver and adjusting a transmission power level of the particular channel so that when a single receiver out of the plurality of receivers requires an increase in the transmission power level to meet that receiver's reception quality requirement, the transmission power level is increased and when all receivers exceed their quality requirement, the transmission power of the transmitter level is decreased.
2. The method of claim 1 wherein the particular channel is a shared channel.
3. The method of claim 1 wherein the particular channel is a high speed shared channel.
4. The method of claim 1 wherein the power control information received includes transmit power control commands.
5. The method of claim 1 wherein the measured reception quality is a signal to interference ratio and the receiver quality requirement is a target signal to interference ratio.
6. The method of claim 1 wherein the measured reception quality is a reception quality of the particular channel.
7. The method of claim 1 wherein for at least one of the receivers, the particular channel has an associated dedicated channel and the measured reception quality is of the associated dedicated channel.
8. The method of claim 1 wherein for each of the receivers, the particular channel has an associated dedicated channel and the measured reception quality is of the associated dedicated channel.
9. A base station for transferring data over a particular channel to multiple users, the base station comprising:
a transmitter and an antenna for producing a particular channel for transmission to a plurality of users simultaneously;
a power control receiver for receiving power control information from each of the users; and
a transmit power control device for using the power control information from each of the plurality of users and adjusting a transmission power level of an amplifier of the particular channel so that when a single user out of the plurality of users requires an increase in the transmission power level, the transmission power level is increased and when all users exceed their quality requirement, the transmission power of the transmitter level is decreased.
10. The base station of claim 9 wherein the particular channel is a shared channel.
11. The base station of claim 9 wherein the particular channel is a high speed shared channel.
12. The base station of claim 9 wherein the power control information received from each user includes transmit power control commands.
13. The base station of claim 9 wherein the base station establishes for each user a dedicated channel associated with the particular channel.
14. The base station of claim 9 wherein the base station has for at least one of the users a dedicated channel associated with the particular channel.
15. A base station for transferring data over a particular channel to multiple users, the base station comprising:
circuitry configured to produce particular channel for transmission to a plurality of users simultaneously;
circuitry configured to receive power control information from each of the users; and
circuitry configured to use the power control information from each of the plurality of users and adjusting a transmission power level of an amplifier of the particular channel so that when a single user out of the plurality of users requires an increase in the transmission power level, the transmission power level is increased and when all users exceed their quality requirement, the transmission power of the transmitter level is decreased.
16. The base station of claim 15 wherein the particular channel is a shared channel.
17. The base station of claim 15 wherein the particular channel is a high speed shared channel.
18. The base station of claim 15 wherein the power control information received from each user is transmit power control commands.
19. The base station of claim 15 wherein the base station establishes for each user a dedicated channel associated with the particular channel.
20. The base station of claim 15 wherein the base station has for at least one of the users a dedicated channel associated with the particular channel.
21. A wireless transmit/receive unit for receiving data over a particular channel, the wireless transmit/receive unit comprising:
a receiver for receiving the particular channel, the particular channel being received by a plurality of wireless transmit/receive units simultaneously;
a power control information generator for sending power control information based on a measured reception quality and a reception quality requirement of the wireless transmit/receive unit; and
wherein the particular channel has a transmission power level set so that when a single wireless transmit/receive unit out of the plurality of wireless transmit/receive unit requires an increase in the transmission power level to meet that reception quality requirement, the transmission power level is increased and when all of the plurality of wireless transmit/receive units sending control information exceed their quality requirement, the transmission power of the transmitter level is decreased.
22. The wireless transmit/receive unit of claim 21 wherein the measured reception quality is a signal to interference ratio and the reception quality requirement is a target signal to interference ratio.
23. The wireless transmit/receive unit of claim 21 wherein the measured reception quality is a reception quality of the particular channel.
24. The wireless transmit/receive unit of claim 21 further comprising a dedicated channel receiver and wherein the measured reception quality is of the dedicated channel.
25. A wireless transmit/receive unit for receiving data over a particular channel, the wireless transmit/receive unit comprising:
circuitry configured to receive the particular channel, the particular channel being received by a plurality of wireless transmit/receive units simultaneously;
circuitry configured to send power control information based on a measured reception quality and a reception quality requirement of the wireless transmit/receive unit; and
wherein the particular channel has a transmission power level set so that when a single receiver out of the plurality of wireless transmit/receive units requires an increase in the transmission power level to meet that reception quality requirement, the transmission power level is increased and when all of the plurality of wireless transmit/receive unit sending control information exceed their quality requirement, the transmission power of the transmitter level is decreased.
26. The wireless transmit/receive unit of claim 25 wherein the measured reception quality is a signal to interference ratio and the reception quality requirement is a target signal to interference ratio.
27. The wireless transmit/receive unit of claim 25 wherein the measured reception quality is a reception quality of the particular channel.
28. The wireless transmit/receive unit of claim 25 further comprising circuitry configured to receive a dedicated channel and wherein the measured reception quality is of the dedicated channel.