Radio communication system
View Patent ↗A radio communication system has means for ensuring that power control of a communication channel has been established before the transmission of data. This is done by delaying initial transmission of a data channel (either at the start of a transmission or after a pause) until after the initial transmission of control channels. In one embodiment the transmission of a data channel can be delayed until adequate power control has been established. These techniques overcome the problem that data transmissions at the start of a data channel are likely to be corrupted if their power level is too low, or to generate extra interference if their power level is too high.
1. A radio communication system, comprising:
a secondary station for transmitting a request for resources;
a primary station for transmitting an acknowledgment of the request for resources;
wherein, subsequent to a reception of the acknowledgement by said secondary station, control information is initially transmitted on an uplink control channel and a downlink control channel between said primary station and said secondary station;
wherein, subsequent to the reception of the acknowledgement by said secondary station, data is initially transmitted on an uplink data channel from said secondary station to said primary station; and
wherein the initial transmission of data on the uplink data channel is determinedly delayed until after the initial transmission of control information on the uplink control channel and the downlink control channel.
2. The radio communication system of claim 1 , farther comprising:
power control means for adjusting power levels of the uplink control channel and the downlink control channel prior to the initial transmission of the data on the uplink data channel.
3. The radio communication system of claim 1 , wherein the delay in the initial transmission of data on the data channel is determined to allow for a correction of a difference between initial power levels and a target power levels in the uplink control channel and the downlink control channel.
4. The radio communication system of claim 1 , wherein said primary station dynamically determines the delay in the initial transmission of data on the data channel.
5. The radio communication system of claim 1 , wherein said secondary station dynamically determines the delay in the initial transmission of data on the data channel.
6. The radio communication system of claim 1 , wherein said the delay in the initial transmission of data on the data channel is predetermined.
7. A primary station, comprising:
means for receiving a request for resources from a secondary station;
means for transmitting an acknowledgment of a reception of the request for resources;
wherein, subsequent to a reception of the acknowledgement by the secondary station, control information is initially transmitted on an uplink control channel and a downlink control channel between said primary station and the secondary station;
wherein, subsequent to the reception of the acknowledgement by the secondary station, data is initially transmitted on an uplink data channel from the secondary station to said primary station; and
wherein the initial transmission of data on the uplink data channel is determinedly delayed until after the initial transmission of control information on the uplink control channel and the downlink control channel.
8. The primary station of claim 7 , further comprising:
power control means for adjusting power levels of the downlink control channel prior to the initial transmission of the data on the uplink data channel.
9. The primary station of claim 8 , wherein the delay in the initial transmission of data on the data channel is determined to allow for a correction of a difference between initial power levels and a target power levels in the uplink-control channel and the downlink control channel.
10. The primary station of claim 7 , wherein said primary station dynamically determines the delay in the initial transmission of data on the data channel.
11. A secondary station, comprising:
means for transmitting a request for resources to a primary station;
means for receiving an acknowledgment of a reception of the request for resources by the primary station;
wherein, subsequent to a reception of the acknowledgement by said secondary station, control information is initially transmitted on an uplink control channel and a downlink control channel between the primary station and said secondary station;
wherein, subsequent to the reception of the acknowledgement by said secondary station, data is initially transmitted on an uplink data channel from said secondary station to the primary station; and
wherein the initial transmission of data on the uplink data channel is determinedly delayed until after the initial transmission of control information on the uplink control channel and the downlink control channel.
12. The secondary station of claim 11 , further comprising:
power control means for adjusting power levels of the uplink control channel prior to the initial transmission of the data on the uplink data channel.
13. The secondary station of claim 11 , wherein the delay in the initial transmission of data on the data channel is determined to allow for a correction of a difference between initial power levels and a target power levels in the uplink control channel and the downlink control channel.
14. The secondary station of claim 11 , wherein said secondary station dynamically determines the delay in the initial transmission of data on the data channel.
15. A method of operating a radio communication system including a primary station and a secondary station, said method comprising:
transmitting a request for resources from the secondary station to the primary station;
transmitting an acknowledgment of the request for resources from the primary station to the secondary station;
subsequent to a reception of the acknowledgement by said secondary station, initially transmitting control information on an uplink control channel and a downlink control channel between said primary station and said secondary station; and
subsequent to the reception of the acknowledgement by said secondary station, initially transmitting data on an uplink data channel from said secondary station to said primary station,
wherein the initial transmission of data on the uplink data channel is determinedly delayed until after the initial transmission of control information on the uplink control channel and the downlink control channel.
16. The method of claim 15 , further comprising:
adjusting a power level of the uplink control channel prior to the initial transmission of the data on the uplink data channel.
17. The method of claim 15 , further comprising:
adjusting a power level of the downlink control channel prior to the initial transmission of the data on the uplink data channel.