Granted Patent B2

US 9,538,425 · App. 14/956,171 · Granted Jan 3, 2017

Inventors: Diana Pani (Montreal, CA); Christopher R Cave (Dollard-des-Ormeaux, CA); Stephen E Terry (Northport, NY); Paul Marinier (Brossard, CA)

Assignee: InterDigital Technology Corporation

H04W36/0005H04W36/02H04W76/046H04L1/1822H04W28/065H04W36/14H04W76/041

Abstract

Claims (85)

1. A method of resetting a medium access control (MAC) unit, the method comprising:

receiving, from a radio resource control (RRC) unit, an enhanced high speed MAC (MAC-ehs) reset request;

flushing a hybrid automatic repeat request (HARQ) soft buffer in the MAC unit for all configured HARQ processes;

stopping a re-ordering release timer and a MAC-ehs re-ordering timer;

performing a re-ordering of received MAC-ehs protocol data units (PDUs) using at least one variable;

setting the timers and the variable to their initial values;

delivering all re-ordering PDUs in a re-ordering queue of the MAC unit to a reassembly unit located in the MAC unit;

performing reassembly of segmented MAC-ehs service data units (SDUs);

delivering successfully reassembled MAC-ehs SDUs to a logical channel identifier (LCH-ID) demultiplexing unit of the MAC unit;

delivering the complete MAC SDUs to the correct logical channel or MAC flow;

discarding stored MAC-ehs SDU segments from a reassembly unit of the MAC unit; and

flushing the re-ordering queue.

2. The method of claim 1 , wherein a primitive message is used for the MAC-ehs reset request.

3. The method of claim 1 , wherein the MAC unit includes a plurality of re-ordering release timers, and wherein stopping the re-ordering release timer and the MAC-ehs reordering timer comprises:

stopping all active re-ordering release timers; and

setting all of the re-ordering release timers to their initial values.

4. The method of claim 1 , wherein the MAC unit includes a plurality of MAC-ehs re-ordering timers, and wherein stopping the re-ordering release timer and the MAC-ehs reordering timer comprises:

stopping all active MAC-ehs re-ordering timers; and

setting all of the MAC-ehs re-ordering timers to their initial values.

5. The method of claim 1 , wherein the MAC unit includes a plurality of re-ordering release timers and a plurality of MAC-ehs re-ordering timers, and wherein stopping the re-ordering release timer and the MAC-ehs reordering timer comprises:

stopping all active re-ordering release timers;

setting all of the re-ordering release timers to their initial value;

stopping all active MAC-ehs re-ordering timers; and

setting all of the MAC-ehs re-ordering timers to their initial value.

6. The method of claim 1 , further comprising:

receiving, at the RRC unit, an RRC message for notifying the WTRU of a MAC reconfiguration occurring at a serving high speed downlink shared channel (HS-DSCH) cell; and

sending the MAC-ehs reset request on condition that the RRC message includes (i) a high speed MAC (MAC-hs) reset indicator, and (ii) an indication of MAC-hs configuration.

7. The method of claim 6 , further comprising: reconfiguring from a MAC-ehs configuration to a MAC-hs configuration in accordance with the indication of MAC-hs configuration.

8. The method of claim 6 , wherein the indication of MAC-hs configuration comprises any of (i) an indication of a header format indicative of the MAC-hs configuration, and (ii) configuration information of the MAC of the HS-DSCH cell after reconfiguration.

9. The method of claim 1 , further comprising:

receiving, at the RRC unit, an RRC message for notifying the WTRU of a MAC reconfiguration occurring at a serving high speed downlink shared channel (HS-DSCH) cell;

sending, to the MAC unit, information corresponding to the configuration information of the MAC of the HS-DSCH cell after reconfiguration; and

performing a high speed MAC (MAC-hs) reconfiguration or a MAC-ehs reconfiguration in accordance with the information.

10. A wireless transmit/receive unit (WTRU) comprising:

a radio resource control (RRC) unit; and

a medium access control (MAC) unit comprising:

a hybrid automatic repeat request (HARQ) soft buffer;

a re-ordering queue;

a re-ordering release timer and an enhanced high speed MAC (MAC-ehs) re-ordering timer;

a reassembly unit; and

a logical channel identifier (LCH-ID) demultiplexing unit,

wherein the RRC unit is configured to send, to the MAC unit, a MAC-ehs reset request; and

wherein the MAC unit is configured to:

receive, from the RRC unit, a MAC-ehs reset request;

flush the HARQ soft buffer for all configured HARQ processes;

stop the re-ordering release timer and the MAC-ehs re-ordering timer;

perform re-ordering of received MAC-ehs protocol data units (PDUs) using at least one variable;

set the timers and the variable to their initial values;

deliver all re-ordering PDUs in the re-ordering queue to the reassembly unit;

perform reassembly of segmented MAC-ehs service data units (SDUs);

deliver successfully reassembled MAC-ehs SDUs to the LCH-ID demultiplexing unit;

deliver the complete MAC SDUs to the correct logical channel or MAC flow;

discard stored MAC-ehs SDU segments from the reassembly unit; and

flush the re-ordering queue.

11. The WTRU of claim 10 , wherein a primitive message is used for the MAC-ehs reset request.

12. The WTRU of claim 10 , wherein the MAC unit includes a plurality of re-ordering release timers and a plurality of MAC-ehs re-ordering timers.

13. The WTRU of claim 12 , wherein the MAC unit is further configured to:

stop all active re-ordering release timers; and

set all of the re-ordering release timers to their initial values.

14. The WTRU of claim 12 , wherein the MAC unit is further configured to:

stop all active MAC-ehs re-ordering timers; and

set all of the MAC-ehs re-ordering timers to their initial values.

15. The WTRU of claim 12 , wherein the MAC unit is further configured to:

stop all active re-ordering release timers;

set all of the re-ordering release timers to their initial value;

stop all active MAC-ehs re-ordering timers; and

set all of the MAC-ehs re-ordering timers to their initial value.

16. The WTRU of claim 10 , wherein the RRC unit is configured to:

receive an RRC message for notifying the WTRU of a MAC reconfiguration occurring at a serving high speed downlink shared channel (HS-DSCH) cell; and

send the MAC-ehs reset request on condition that the RRC message includes (i) a high speed MAC (MAC-hs) reset indicator, and (ii) an indication of MAC-hs configuration.

17. The WTRU of claim 16 , wherein the MAC unit is configured to:

reconfigure from a MAC-ehs configuration to a MAC-hs configuration in accordance with the indication of MAC-hs configuration.

18. The WTRU of claim 16 , wherein the indication of MAC-hs configuration comprises any of (i) an indication of a header format indicative of the MAC-hs configuration, and (ii) configuration information of the MAC of the HS-DSCH cell after reconfiguration.

19. The WTRU of claim 10 , wherein:

the RRC unit is configured to:

receive an RRC message for notifying the WTRU of a MAC reconfiguration occurring at a serving high speed downlink shared channel (HS-DSCH) cell; and

send, to the MAC unit, information corresponding to the configuration information of the MAC of the HS-DSCH cell after reconfiguration; and

the MAC unit is configured to perform a high speed MAC (MAC-hs) reconfiguration or a MAC-ehs reconfiguration in accordance with the information.

20. The WTRU of claim 10 , wherein:

the RRC unit is configured to:

receive an RRC message for notifying the WTRU of a MAC reconfiguration occurring at a serving high speed downlink shared channel (HS-DSCH) cell; and

send, to the MAC unit, a primitive message including information corresponding to the configuration information of the MAC of the HS-DSCH cell after reconfiguration; and

the MAC unit is configured to:

receive the primitive message; and

perform a high speed MAC (MAC-hs) reconfiguration or a MAC-ehs reconfiguration in accordance with the information included in the primitive message.

Assignments (1)

Continuity (8)