Method and apparatus for dynamically allocating H-ARQ processes
A method and apparatus for supporting enhanced uplink (EU) transmissions, implemented in a wireless transmit/receive unit (WTRU), is disclosed. The WTRU provides hybrid automatic repeat request (H-ARQ) processes for supporting transmission over an enhanced dedicated channel (E-DCH), wherein at least one H-ARQ process is reserved for a dedicated channel medium access control channel (MAC-d) flow. The WTRU receives H-ARQ information, wherein the information indicates H-ARQ processes for which transmission of data from the MAC-d flow is allowed. For each transmission time interval (TTI), the WTRU allocates an H-ARQ process for use by the MAC-d flow, from the allowed H-ARQ processes. The WTRU transmits data from the MAC-d flow over the E-DCH using the allocated H-ARQ process.
1. A method for supporting enhanced uplink (EU) transmissions, implemented in a wireless transmit/receive unit (WTRU), comprising:
providing hybrid automatic repeat request (H-ARQ) processes for supporting transmission over an enhanced dedicated channel (E-DCH), wherein at least one H-ARQ process is reserved for a dedicated channel medium access control channel (MAC-d) flow;
receiving H-ARQ information, wherein the information indicates H-ARQ processes for which transmission of data from the MAC-d flow is allowed;
for a transmission time interval (TTI), allocating an H-ARQ process for use by the MAC-d flow, from the allowed H-ARQ processes; and
transmitting data from the MAC-d flow over the E-DCH using the allocated H-ARQ process.
2. The method of claim 1 , wherein the H-ARQ information is received via radio resource control (RRC) signaling.
3. The method of claim 1 , wherein the H-ARQ information is received from a radio network controller (RNC).
4. The method of claim 1 , wherein H-ARQ information is received for each MAC-d flow configured for the WTRU.
5. The method of claim 1 , wherein the H-ARQ information limits the number of H-ARQ processes for use by a MAC-d flow.
6. The method of claim 1 , wherein the H-ARQ processes in which transmission of the MAC-d flow is allowed are from the at least one reserved H-ARQ process.
7. The method of claim 1 , wherein the at least one reserved H-ARQ process is reserved for more than one MAC-d flow.
8. A wireless transmit/receive unit (WTRU) comprising:
a controller configured to provide hybrid automatic repeat request (H-ARQ) processes for supporting transmission over an enhanced dedicated channel (E-DCH), wherein at least one H-ARQ process is reserved for a dedicated channel medium access control channel (MAC-d) flow;
a receiver configured to receive H-ARQ information, wherein the information indicates H-ARQ processes for which transmission of data from the MAC-d flow is allowed;
for a transmission time interval (TTI), the controller is further configured to allocate an H-ARQ process for use by the MAC-d flow, from the allowed H-ARQ processes; and
a transmitter configured to transmit data from the MAC-d flow over the E-DCH using the allocated H-ARQ process.
9. The WTRU of claim 8 , wherein the H-ARQ information is received via radio resource control (RRC) signaling.
10. The WTRU of claim 8 , wherein the H-ARQ information is received from a radio network controller (RNC).
11. The WTRU of claim 8 , wherein H-ARQ information is received for each MAC-d flow configured for the WTRU.
12. The WTRU of claim 8 , wherein the H-ARQ information limits the number of H-ARQ processes for use by a MAC-d flow.
13. The WTRU of claim 8 , wherein the H-ARQ processes in which transmission of the MAC-d flow is allowed are from the at least one reserved H-ARQ process.
14. The WTRU of claim 8 , wherein the at least one reserved H-ARQ process is reserved for more than one MAC-d flow.