Method and apparatus for supporting uplink protocol changes
View Patent ↗A method and apparatus for supporting uplink (UL) protocol changes includes reconfiguring a medium access control (MAC) protocol from a first MAC protocol to a second MAC protocol. A hybrid automatic repeat request (HARD) process associated with the first MAC protocol is flushed, and a MAC-e/es reset is performed. Segments of a MAC-e/es packet data unit (PDU) that are contained in a segmentation entity are discarded.
1. A method for supporting uplink (UL) protocol changes, comprising:
operating under a first medium access control (MAC) protocol;
in response to receiving a protocol change trigger, reconfiguring the MAC protocol from operation in the first MAC protocol to operation in a second MAC protocol;
flushing a hybrid automatic repeat request (HARQ) process associated with operation in the first MAC protocol; and
performing a MAC-e/es reset, wherein the performing of the MAC-e/es reset comprises discarding segments in a segmentation entity.
2. The method of claim 1 , further comprising receiving a MAC-e/es reset indication.
3. The method of claim 2 wherein the MAC-e/es reset indication is received via radio resource controller (RRC) signaling.
4. The method of claim 3 wherein the RRC signaling includes an RRC reconfiguration message.
5. The method of claim 2 wherein the MAC-e/es reset indication is received via an active update message.
6. A method for performing a MAC-e/es reset, comprising:
in response to receiving a protocol change trigger, flushing a hybrid automatic report request (HARQ) process;
setting a state variable to zero for logical channels mapped to an enhanced dedicated channel (E-DCH); and
discarding segments in a segmentation entity.
7. A wireless transmit/receive unit (WTRU), comprising:
a receiver;
a transmitter; and
a processor in communication with the receiver and the transmitter, the processor configured to, in response to receiving a protocol change trigger, flush a hybrid automatic repeat request (HARD) process, set a state variable to zero for all logical channels mapped to an enhanced dedicated channel (E-DCH), and discard segments in a segmentation entity.
8. The WTRU of claim 7 wherein the processor is further configured to notify a radio link controller (RLC) of a failed RLC packet data unit (PDU).
9. The WTRU of claim 8 wherein the processor is further configured to retransmit the failed RLC PDU.
10. The WTRU of claim 9 wherein the processor is further configured to discard the PLC PDU after transmission.
11. The WTRU of claim 9 wherein the processor is further configured to notify the RLC of PDUs present in a hybrid automatic repeat request (HARD) buffer.