METHOD AND APPARATUS FOR FORWARDING NON-CONSECUTIVE DATA BLOCKS IN ENHANCED UPLINK TRANSMISSIONS

Abstract

A method and apparatus for forwarding non-consecutive data blocks in enhanced uplink (EU) transmissions. A wireless transmit/receive unit (WTRU) and one or more Node-Bs include one or more automatic repeat request (ARQ)/hybrid-ARQ (H-ARQ) processes for supporting an enhanced dedicated channel (E-DCH). Data blocks transmitted by the WTRU are re-ordered in a re-ordering entity located in the Node-B(s) or a radio network controller (RNC). Once a missing data block is identified a data forwarding timer in the Node-B(s) or RNC is initiated and subsequent WTRU transmissions are monitored to determine whether the missing data block has been discarded by the WTRU. Upon recognition of the discard of the missing data block the non-consecutive data blocks are forwarded to higher layers.

A method and apparatus for forwarding non-consecutive data blocks in enhanced uplink (EU) transmissions. A wireless transmit/receive unit (WTRU) and one or more Node-Bs include one or more automatic repeat request (ARQ)/hybrid-ARQ (H-ARQ) processes for supporting an enhanced dedicated channel (E-DCH). Data blocks transmitted by the WTRU are re-ordered in a re-ordering entity located in the Node-B(s) or a radio network controller (RNC). Once a missing data block is identified a data forwarding timer in the Node-B(s) or RNC is initiated and subsequent WTRU transmissions are monitored to determine whether the missing data block has been discarded by the WTRU. Upon recognition of the discard of the missing data block the non-consecutive data blocks are forwarded to higher layers.

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Technology	Declaration Information			Specification Information	Explicitly Disclosed	Patent Type
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Not Available	20/03/2007	ISLD-200802-001	INTERDIGITAL INC	S1 TS Number: Not Available Version No: Illustrative part: ---- Release: + -	No	Family Member
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Publication No	Technology	Declaration Information			Specification Information				Explicitly Disclosed	Patent Type	Status	National Phase Entries
Publication No	Technology	Declaration Date	Declaration Reference	Declaring Company	Specification Information				Explicitly Disclosed	Patent Type	Status	National Phase Entries
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Technologies

Feedback

Product

Not Available

Use Cases

Wireless communication

Services

Not Available

Claim

1. In a wireless communication system including a wireless transmit/receive unit (WTRU), at least one Node-B and a radio network controller (RNC), wherein the WTRU and the Node-B include one or more automatic repeat request (ARQ)/hybrid-ARQ (H-ARQ) processes for supporting transmission and reception of data blocks via an enhanced dedicated channel (E- DCH) and the transmitted data blocks are re-ordered in accordance with a unique transmission sequence number (TSN) assigned to each data block by the WTRU, a method for forwarding non-consecutive data blocks which have not been forwarded due to a missing data block, the method comprising:', '(a) recognizing a missing data block among a plurality of data blocks;', "(b) initializing a timer for forwarding' non-consecutive data blocks;", '(c) monitoring subsequent data transmissions by the WTRU to determine whether the missing data block has been discarded by the WTRU based on ARQ H-ARQ process assignment mechanism agreed upon among the WTRU, the Node-B and the RNC; and', '(d) forwarding the non-consecutive data blocks to a higher layer upon either recognition of the discard of the missing data block or expiration of the timer, whichever occurs first.

2. The method of claim 1 wherein the ARQ/H-ARQ processes are assigned in accordance with absolute priority of the data blocks, whereby a higher priority class data block is transmitted before a lower priority class data block and a data block with earliest TSN is transmitted first within the same priority class.

3. The method of claim 2 wherein the steps (a)-(d) are performed at the Node-B.

4. The method of claim 3 wherein the Node-B recognizes the discard of the missing data block when the Node-B recognizes that all available and active ARQ/H-ARQ processes for the WTRU have either a new transmission of a data block with higher TSN within the same priority class to the missing data block or a new transmission of a data block in a lower priority class compared to the missing data block.

5. The method of claim 4 wherein the Node-B realizes the new transmission by reception of a new data indicator (NDI).

6. The method of claim 4 wherein the new transmission is realized by a received transmission queue identity and a TSN.

7. The method of claim 4 wherein the Node-B supports several reordering queues for each WTRU and the forwarding of the non-consecutive data blocks operates independently for each re-ordering queue.

8. The method of claim 2 wherein the steps of (a)-(d) are performed at the RNC.

9. The method of claim 8 wherein the RNC recognizes the discard of the missing data block based on information provided by the Node-B

10. The method of claim 9 wherein the Node-B provides, for each successful decoding of a data block, ARQ H-ARQ process identity and frame number when a new data transmission was first received, which is indicated by a new data indicator (NDI)

11. The method of claim 2 wherein the steps (a), (b) and (d) are performed by the RNC and the step (c) is performed by the Node-B upon receipt of a start watch command which is issued by the RNC upon recognition of the missing data block, and the RNC forwards the non-consecutive data blocks to a higher layer upon receipt of a transmission failure message indicating discard of the missing data block from the Node-B

12. The method of claim 11 wherein the start watch command includes a frame number when the out-of-sequence is recognized and the priority and TSN of the missing data block

13. The method of claim 12 wherein the Node-B checks a database of transmissions since the frame number indicated by the RNC and following transmissions in order to detect the discard of the missing data block

14. A wireless communication system for forwarding non-consecutive data blocks which have not been forwarded due to a missing data block, the system comprising: a wireless transmit/receive unit (WTRU) comprising one or more automatic repeat request (ARQ)/hybrid-ARQ (H-ARQ) processes for supporting transmission of data blocks via an enhanced dedicated channel (E-DCH) while assigning a unique transmission sequence number (TSN) to each data block; and at least one Node-B comprising: one or more ARQ H-ARQ processes for supporting reception of data blocks via an E-DCH; a re-ordering buffer for storing transmitted data blocks; a data forwarding timer for setting a duration for forwarding non- consecutive data blocks; and a re-ordering entity for identifying a missing data block based on a TSN, for monitoring subsequent data transmissions by a WTRU to determine whether the missing data block has been discarded by the WTRU based on known ARQ H-ARQ process assignment mechanism, and for forwarding the non- consecutive data blocks to a higher layer upon either recognition of the discard of the missing data block or expiration of the data forwarding timer, whichever occurs first

15. The system of claim 14 wherein the ARQ/H-ARQ processes are assigned in accordance with absolute priority of the data blocks, whereby a higher priority class data block is transmitted before a lower priority class data block and a data block with earliest TSN is transmitted first within the same priority class

16. The system of claim 15 wherein the re-ordering entity recognizes the discard of the missing data block when the re-ordering entity recognizes that all available and active ARQ/H-ARQ processes for the WTRU at the Node-B have either a new transmission of a data block with higher TSN within the priority class same to the missing data block or a new transmission of a data block in a lower priority class compared to the missing data block

17. The system of claim 16 wherein the new transmission is realized by reception of a new data indicator (NDI)

18. The system of claim 16 wherein the new transmission is realized by a received transmission queue identity and a TSN

19. The system of claim 14 wherein the Node-B supports several reordering queues for each WTRU and the forwarding of the non-consecutive data blocks operates independently for each re-ordering queue.

20. A wireless communication system for forwarding non-consecutive data blocks which have not been forwarded due to a missing data block, the system comprising: a wireless transmit receive unit (WTRU) comprising one or more automatic repeat request (ARQ)/hybrid-ARQ (H-ARQ) processes for supporting transmission of data blocks via an enhanced dedicated channel (E-DCH) while assigning a unique transmission sequence number (TSN) to each data block; at least one Node-B comprising one or more ARQ/H-ARQ processes for supporting reception of data blocks via an E-DCH, the Node-B forwarding decoded data to a radio network controller (RNC) along with information necessary for the RNC to recognize the discard of the missing data block by the WTRU; and the RNC comprising: a re-ordering buffer for storing transmitted data blocks; a data forwarding timer for setting a duration for forwarding non- consecutive data blocks; and a re-ordering entity for identifying a missing data block, for monitoring subsequent data transmissions by a WTRU to determine whether the missing data block has been discarded by the WTRU based on known ARQ/H- ARQ process assignment mechanism, and for forwarding the non-consecutive data blocks to a higher layer upon either recognition of the discard of the missing data block or expiration of the timer, whichever occurs first.

21. The system of claim 20 wherein the ARQ H-ARQ processes are assigned in accordance with absolute priority of the data blocks, whereby a higher priority class data block is transmitted before a lower priority class data block and a data block with earliest TSN is transmitted first within the same priority class.

22. The system of claim 21 wherein the re-ordering entity recognizes the discard of the missing data block when the re-ordering entity recognizes that all available and active ARQ/H-ARQ processes for the WTRU at the Node-B have either a new transmission of a data block with higher TSN within the priority class same to the missing data block or a new transmission of a data block in a lower priority class compared to the missing data block.

23. The system of claim 20 wherein the Node-B provides, for each successful decoding of a data block, ARQ/H-ARQ process identity and frame number when a new data transmission was first received, which is indicated by a new data indicator (NDI).

24. A wireless communication system for forwarding non-consecutive data blocks which have not been forwarded due to a missing data block, the system comprising: a wireless transmit/receive unit (WTRU) comprising one or more automatic repeat request (ARQ)/hybrid-ARQ (H-ARQ) processes for supporting transmission of data blocks via an enhanced dedicated channel (E-DCH) while assigning a unique transmission sequence number (TSN) to each data block; and at least one Node-B comprising: one or more ARQ H-ARQ processes for supporting reception of data blocks via an E-DCH; and a re-ordering entity for monitoring subsequent data transmissions by a WTRU to determine whether a missing data block has been discarded by the WTRU based on known ARQ/H-ARQ process assignment mechanism upon receipt of a start watch command from a radio network controller (RNC), and for reporting a transmission failure message to the RNC when the re-ordering entity detects a discard of the missing data block by the WTRU.

25. The system of claim 24 wherein the ARQ/H-ARQ processes are assigned in accordance with absolute priority of the data blocks, whereby a higher priority class data block is transmitted before a lower priority class data block and a data block with earliest TSN is transmitted first within the same priority class.

26. The system of claim 25 wherein the re-ordering entity recognizes the discard of the missing data block when the re-ordering entity recognizes that all available and active ARQ/H-ARQ processes for the WTRU at the Node-B have either a new transmission of a data block with higher TSN within the priority class same to the missing data block or a new transmission of a data block in a lower priority class compared to the missing data block.

27. The system of claim 24 wherein the start watch command includes a frame number when the out-of-sequence is recognized and the priority and TSN of the missing data block.

28. The system of claim 27 wherein the re-ordering entity checks a database of transmissions since the frame number indicated by the RNC and following transmissions in order to detect the discard of the missing data block.

29. A Node-B for forwarding non-consecutive data blocks which have not been forwarded due to a missing data block, the Node-B comprising: one or more automatic repeat request (ARQ)/hybrid-ARQ (H-ARQ) processes for supporting reception of data blocks via an enhanced dedicated channel (E-DCH) from a wireless transmit/receive unit (WTRU); a re-ordering buffer for storing transmitted data blocks; a data forwarding timer for setting a duration for forwarding non- consecutive data blocks; and a re-ordering entity for identifying a missing data block based on a transmission sequence number (TSN), for monitoring subsequent data transmissions by the WTRU to determine whether the missing data block has been discarded by the WTRU based on known ARQ/H-ARQ process assignment mechanism, and for forwarding the non-consecutive data blocks to a higher layer upon either recognition of the discard of the missing data block or expiration of the data forwarding timer, whichever occurs first.

30. The Node-B of claim 29 wherein the ARQ H-ARQ processes are assigned in the WTRU in accordance with absolute priority of the data blocks, whereby a higher priority class data block is transmitted before a lower priority class data block and a data block with earliest TSN is transmitted first within the same priority class.

31. The Node-B of claim 30 wherein the re-ordering entity recognizes the discard of the missing data block when the re-ordering entity recognizes that all available and active ARQ/H-ARQ processes for the WTRU at the Node-B have either a new transmission of a data block with higher TSN within the priority class same to the missing data block or a new transmission of a data block in a lower priority class compared to the missing data block.

32. The Node-B of claim 31 wherein the new transmission is realized by reception of a new data indicator (NDI).

33. The Node-B of claim 31 wherein the new transmission is realized by a received transmission queue identity and a TSN.

34. The Node-B of claim 29 wherein the Node-B supports several reordering queues for each WTRU and the forwarding of the non-consecutive data blocks operates independently for each re-ordering queue.

35. A radio network controller (RNC) configured to forward non- consecutive data blocks to a higher layer which have not been forwarded due to a missing data block, the RNC comprising: a re-ordering buffer for storing data blocks which are transmitted by a wireless transmit/receive unit (WTRU) and forwarded via a Node-B; a data forwarding timer for setting a duration for forwarding non- consecutive data blocks; and a re-ordering entity for identifying a missing data block, for monitoring subsequent data transmissions by a WTRU to determine whether the missing data block has been discarded by the WTRU based on a known automatic repeat request (ARQ)Zhybrid-ARQ (H-ARQ) process assignment mechanism along with information provided by the Node-B to recognize the discard of the missing data block by the WTRU, and for forwarding the non-consecutive data blocks to a higher layer upon either recognition of the discard of the missing data block or expiration of the timer, whichever occurs first.

36. The RNC of claim 35 wherein the ARQ/H-ARQ processes are assigned by the WTRU in accordance with absolute priority of the data blocks, whereby a higher priority class data block is transmitted before a lower priority class data block and a data block with earliest TSN is transmitted first within the same priority class.

37. The RNC of claim 36 wherein the re-ordering entity recognizes the discard of the missing data block when the re-ordering entity recognizes that all available and active ARQ/H-ARQ processes for the WTRU at the Node-B have either a new transmission of a data block with higher TSN within the priority class same to the missing data block or a new transmission of a data block in a lower priority class compared to the missing data block.

38. The RNC of claim 35 wherein the Node-B provides, for each successful decoding of a data block, ARQ/H-ARQ process identity and frame number when a new data transmission was first received, which is indicated by a new data indicator (NDI).

39. An integrated circuit (IC) configured to forward non-consecutive data blocks to a higher layer which have not been forwarded due to a missing data block, the IC comprising: a re-ordering buffer for receiving and storing data blocks; a data forwarding timer for setting a duration for forwarding non- consecutive data blocks; and a re-ordering entity in communication with the buffer and the timer for identifying a missing data block, for monitoring subsequent data transmissions to determine whether the missing data block has been discarded, and for forwarding the non-consecutive data blocks to a higher layer upon either recognition of the discard of the missing data block or expiration of the timer, whichever occurs first.']

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