Determining and sending channel quality indicators (CQIS) for different cells
Channel quality indicators (CQIs) for each cell of a plurality of cells may be sent at a multiple of a transmission time interval (TTI). CQIs for the different cells may be in different TTIs. A timer or L 2 message may be utilized to determine when to send CQIs for different cells. CQIs for different cells may be sent over an uplink data channel in a single TTI.
1. A wireless transmit/receive unit (WTRU) comprising:
a processor configured to determine a plurality of channel quality indicators (CQIs) from measurements of downlink transmissions from different cells;
the processor and a transmitter are configured to transmit, to a network node, control information in transmission time intervals (TTIs) on a physical control channel, wherein the control information includes the plurality of CQIs;
wherein CQIs for a first cell of the different cells are transmitted at a multiple of a TTI and CQIs for a second cell of the different cells are not transmitted in TTIs having CQIs of the first cell;
wherein a timer is configured in relation to a control signal received by the WTRU;
wherein, in response to expiration of the timer for the first cell, the transmission of the control information including the plurality of CQIs is ceased for the first cell and transmission of CQIs continue for the second cell;
wherein the transmission of the CQIs for the second cell is ceased in response to a received layer 2 (L 2 ) message while transmission of CQIs for at least one other of the different cells continues; and
the transmitter is further configured to transmit non-ceased CQIs for the at least one other of the different cells over an uplink data channel in a single TTI.
2. The WTRU of claim 1 , wherein the processor and the transmitter are further configured to switch between sending control information indicating the plurality of CQIs and sending control information indicating a single CQI.
3. The WTRU of claim 1 , wherein the plurality of CQIs are associated with different Node Bs.
4. The WTRU of claim 1 , wherein the network node is a Node B.
5. The WTRU of claim 1 , wherein the downlink transmissions are received using a high speed downlink shared channel (HS-DSCH).
6. The WTRU of claim 1 , wherein the physical control channel is a High Speed Dedicated Physical Control Channel (HS-DPCCH).
7. The WTRU of claim 1 , wherein the different cells are High-speed Downlink Packet Access (HSDPA) serving cells.
8. A method performed by a wireless transmit/receive unit (WTRU), the method comprising:
determining, by the WTRU, a plurality of channel quality indicators (CQIs) from measurements of downlink transmissions from different cells;
transmitting, by the WTRU to a network node, control information in transmission time intervals (TTIs) on a physical control channel, wherein the control information includes the plurality of CQIs;
wherein CQIs for a first cell of the different cells are transmitted at a multiple of a TTI and CQIs for a second cell of the different cells are not transmitted in TTIs with CQIs of the first cell;
wherein a timer is configured in relation to a control signal received by the WTRU;
wherein, in response to expiration of the timer for the first cell, the transmission of the control information including the plurality of CQIs is ceased for the first cell and transmission of CQIs continue for the second cell;
wherein the transmission of the CQIs for the second cell is ceased in response to a received layer 2 (L 2 ) message while transmission of CQIs for at least one other of the different cells continues; and
transmitting, by a transmitter of the WTRU, non-ceased CQIs for the at least one other of the different cells over an uplink data channel in a single TTI.
9. The method of claim 8 further comprising:
switching, by the WTRU, between sending control information indicating the plurality of CQIs and sending control information indicating a single CQI.
10. The method of claim 8 , wherein the plurality of CQIs are associated with different Node Bs.
11. The method of claim 8 , wherein the network node is a Node B.
12. The method of claim 8 , wherein the downlink transmissions are received using a high speed downlink shared channel (HS-DSCH).
13. The method of claim 8 , wherein the physical control channel is a High Speed Dedicated Physical Control Channel (HS-DPCCH).
14. The method of claim 8 , wherein the different cells are High-speed Downlink Packet Access (HSDPA) serving cells.