Dynamic resource allocation, scheduling and signaling for variable data rate service in LTE

• US 9,391,805 B2
• Filed: 08/21/2007
• Issued: 07/12/2016
• Est. Priority Date: 08/21/2006
• Status: Active Grant

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Wang, Jin, Sammour, Mohammed, Chandra, Arty
• Primary Examiner(s): Hailu, Kibrom T
• Application Number:
  US11/842,543
• Publication Number:
  US 20080045272A1
• Time in Patent Office: 3,248 Days
• Field of Search: 370/329, 370/395.4, 370/395.41, 370/395.2, 370/278
• US Class Current: 1/1
• CPC Class Codes: H04B 1/713 using frequency hopping
• CPC Class Codes: H04L 1/18 Automatic repetition systems, e.g. Van Duuren systems
• CPC Class Codes: H04L 1/1822 involving configuration of automatic repeat request [ARQ] with parallel processes
• CPC Class Codes: H04L 1/1896 ARQ related signaling
• CPC Class Codes: H04L 47/15 in relation to multipoint traffic arrangements for broadcast or multicast in data networks H04L12/18
• CPC Class Codes: H04L 47/70 Admission control; Resource allocation
• CPC Class Codes: H04L 47/762 triggered by the network
• CPC Class Codes: H04L 47/824 Applicable to portable or mobile terminals
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/003 Arrangements for allocating sub-channels of the transmission path
• CPC Class Codes: H04L 5/0064 Rate requirement of the data, e.g. scalable bandwidth, data priority
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04L 5/0096 Indication of changes in allocation
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/543 based on requested quality, e.g. QoS

Abstract

A method and apparatus are provided for dynamic resource allocation, scheduling and signaling for variable data real time services (RTS) in long term evolution (LTE) systems. Preferably, changes in data rate for uplink RTS traffic are reported to an evolved Node B (eNB) by a UE using layer 1, 2 or 3 signaling. The eNB dynamically allocates physical resources in response to a change in data rate by adding or removing radio blocks currently assigned to the data flow, and the eNB signals the new resource assignment to the UE. In an alternate embodiment, tables stored at the eNB and the UE describe mappings of RTS data rates to physical resources under certain channel conditions, such that the UE uses the table to locally assign physical resources according to changes in UL data rates. Additionally, a method and apparatus for high level configuration of RTS data flows is also presented.

Claims

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

a receiver configured to receive first control information including a first allocation of resources for uplink data;

wherein the first allocation of resources is a first type of resource allocation;

wherein the first allocation of resources indicates at least a first number of resource blocks assigned to the WTRU and is associated with a first data rate;

wherein the first type of resource allocation is available to transmit uplink data until the WTRU receives a deallocation of the first allocation of resources;

a transmitter configured to transmit uplink data according to the first allocation of resources;

the receiver configured to receive second control information including a second allocation of resources for uplink data;

wherein the second allocation of resources is a second type of resource allocation;

wherein the second allocation of resources indicates at least a second number of resource blocks assigned to the WTRU and is associated with a second data rate different than the first data rate;

wherein the second type of resource allocation is utilized to transmit uplink data instead of the first type of resource allocation once;

wherein no duration is specified by the second control information; and

the transmitter configured to transmit uplink data according to the second allocation of resources once.

2. The WTRU of claim 1 wherein the second allocation of resources overrides the first allocation of resources.

3. The WTRU of claim 1 wherein the second control information is received as L1/L2 control information.

4. The WTRU of claim 3 wherein the L1/L2 control information is received in an orthogonal frequency division multiple access (OFDMA) format.

5. The WTRU of claim 1 wherein the second allocation of resources is for a single subframe.

6. The WTRU of claim 1 wherein the WTRU operates in a real time system (RTS).

7. The WTRU of claim 1 wherein the WTRU operates in a voice over internet protocol (IP) (VOIP) environment.

8. The WTRU of claim 1 wherein the WTRU is an evolved universal terrestrial radio access (E-UTRA) WTRU.

9. The WTRU of claim 1 wherein:

the transmitter is configured to transmit a retransmission of uplink data according to the second allocation of resources.

10. The WTRU of claim 1 wherein the first number of resource blocks indicates a first number of subchannels assigned to the WTRU and the second number of resource blocks indicates a second number of subchannels assigned to the WTRU.

11. The WTRU of claim 3 wherein the first allocation of resources and the second allocation of resources are distinguished by different identifications (IDs).

12. A method for receiving a dynamic resource allocation by a wireless transmit/receive unit (WTRU), the method comprising:

receiving first control information including a first allocation of resources for uplink data;

wherein the first allocation of resources is a first type of resource allocation;

wherein the first allocation of resources indicates at least a first number of resource blocks assigned to the WTRU and is associated with a first data rate;

wherein the first type of resource allocation is available to transmit uplink data until the WTRU receives a deallocation of the first allocation of resources;

transmitting uplink data according to the first allocation of resources;

receiving second control information including a second allocation of resources for uplink data;

wherein the second allocation of resources is a second type of resource allocation;

wherein the second allocation of resources indicates at least a second number of resource blocks assigned to the WTRU and is associated with a second data rate different than the first data rate;

wherein the second type of resource allocation is utilized to transmit uplink data instead of the first type of resource allocation once;

wherein no duration is specified by the second control information; and

transmitting uplink data according to the second allocation of resources once.

13. The method of claim 12 wherein the second allocation of resources overrides the first allocation of resources.

14. The method of claim 12 wherein the second control information is received as L1/L2 control information.

15. The method of claim 14 wherein the L1/L2 control information is received in an orthogonal frequency division multiple access (OFDMA) format.

16. The method of claim 12 wherein the transmitting uplink data according to the second allocation of resources is for a single subframe.

17. The method of claim 12 wherein the dynamic resource allocation is in a real time system (RTS).

18. The method of claim 12 wherein the dynamic resource allocation is used for a voice over internet protocol (IP) (VOIP).

19. The method of claim 12 wherein the dynamic resource allocation is in an evolved universal terrestrial radio access (E-UTRA) environment.

20. The method of claim 12 wherein:

the transmitting uplink data according to the second allocation of resources includes transmitting a retransmission of uplink data according to the second allocation of resources.

21. The method of claim 12 wherein the first number of resource blocks indicates a first number of subchannels assigned to the WTRU and the second number of resource blocks indicates a second number of subchannels assigned to the WTRU.

22. The method of claim 14 wherein the first allocation of resources and the second allocation of resources are distinguished by different identifications (IDs).

23. A base station comprising:

a transmitter configured to transmit to a wireless transmit/receive unit (WTRU)first control information including a first allocation of resources for uplink data;

wherein the first allocation of resources is a first type of resource allocation;

wherein the first allocation of resources indicates at least a first number of resource blocks assigned to the WTRU and is associated with a first data rate;

wherein the first type of resource allocation is available to receive uplink data until the base station deallocates the first allocation of resources;

a receiver configured to receive from the WTRU uplink data according to the first allocation of resources;

the transmitter configured to transmit to the WTRU second control information including a second allocation of resources for uplink data;

wherein the second allocation of resources is a second type of resource allocation;

wherein the second allocation of resources indicates at least a second number of resource blocks assigned to the WTRU and is associated with a second data rate different than the first data rate;

wherein the second type of resource allocation is utilized to transmit uplink data instead of the first type of resource allocation once;

wherein no duration is specified by the second control information; and

the receiver configured to receive from the WTRU uplink data according to the second allocation of resources once.

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

a receiver configured to receive first control information including a first allocation of resources for downlink data;

wherein the first allocation of resources is a first type of resource allocation;

wherein the first allocation of resources indicates at least a first number of resource blocks assigned to the WTRU and is associated with a first data rate;

wherein the first type of resource allocation is available to receive downlink data until the WTRU receives a deallocation of the first allocation of resources;

the receiver configured to receive downlink data according to the first allocation of resources;

the receiver configured to receive second control information including a second allocation of resources for downlink data;

wherein the second allocation of resources is a second type of resource allocation;

wherein the second allocation of resources indicates at least a second number of resource blocks assigned to the WTRU and is associated with a second data rate different than the first data rate;

wherein the second type of resource allocation is utilized to receive downlink data instead of the first type of resource allocation once;

wherein no duration is specified by the second control information; and

the receiver configured to receive downlink data according to the second allocation of resources once.

25. The WTRU of claim 24 wherein the second allocation of resources overrides the first allocation of resources.

26. The WTRU of claim 24 wherein the second control information is received as L1/L2 control information.

27. The WTRU of claim 26 wherein the L1/L2 control information is received in an orthogonal frequency division multiple access (OFDMA) format.

28. The WTRU of claim 24 wherein the second allocation of resources is for a single subframe.

29. The WTRU of claim 24 wherein the WTRU operates in a real time system (RTS).

30. The WTRU of claim 24 wherein the WTRU operates in a voice over internet protocol (IP) (VOIP) environment.

31. The WTRU of claim 24 wherein the WTRU is an evolved universal terrestrial radio access (E-UTRA) WTRU.

32. The WTRU of claim 24 wherein:

the receiver is configured to receive a retransmission of downlink data according to the second allocation of resources.

33. The WTRU of claim 24 wherein the first number of resource blocks indicates a first number of subchannels assigned to the WTRU and the second number of resource blocks indicates a second number of subchannels assigned to the WTRU.

34. The WTRU of claim 26 wherein the first allocation of resources and the second allocation of resources are distinguished by different identifications (IDs).

35. A method for dynamic resource allocation for use by a wireless transmit/receive unit (WTRU), the method comprising:

receiving first control information including a first allocation of resources for downlink data;

wherein the first allocation of resources is a first type of resource allocation;

wherein the first allocation of resources indicates at least a first number of resource blocks assigned to the WTRU and is associated with a first data rate;

wherein the first type of resource allocation is available to receive downlink data until the WTRU receives a deallocation of the first allocation of resources;

receiving downlink data according to the first allocation of resources;

receiving second control information including a second allocation of resources for downlink data;

wherein the second allocation of resources is a second type of resource allocation;

wherein the second allocation of resources indicates at least a second number of resource blocks assigned to the WTRU and is associated with a second data rate different than the first data rate;

wherein the second type of resource allocation is utilized to receive downlink data instead of the first type of resource allocation once;

wherein no duration is specified by the second control information; and

receiving downlink data according to the second allocation of resources once.

36. The method of claim 35 wherein the second allocation of resources overrides the first allocation of resources.

37. The method of claim 35 wherein the second control information is received as L1/L2 control information.

38. The method of claim 37 wherein the L1/L2 control information is received in an orthogonal frequency division multiple access, (OFDMA), format.

39. The method of claim 35 wherein the second allocation of resources is for a single subframe.

40. The method of claim 35 wherein the dynamic resource allocation is in a real time system (RTS).

41. The method of claim 35 wherein the dynamic resource allocation is used for a voice over internet protocol (IP) (VOIP).

42. The method of claim 35 wherein the dynamic resource allocation is in an evolved universal terrestrial radio access (E-UTRA) environment.

43. The method of claim 35 wherein:

the receiving downlink data according to the second allocation of resources includes receiving a retransmission of downlink data according to the second allocation of resources.

44. The method of claim 35 wherein the first number of resource blocks indicates a first number of subchannels assigned to the WTRU and the second number of resource blocks indicates a second number of subchannels assigned to the WTRU.

45. The method of claim 37 wherein the first allocation of resources and the second allocation of resources are distinguished by different identifications (IDs).

46. A base station comprising:

a transmitter configured to transmit to a wireless transmit/receive unit (WTRU) first control information including a first allocation of resources for downlink data;

wherein the first allocation of resources is a first type of resource allocation;

wherein the first allocation of resources indicates at least a first number of resource blocks assigned to the WTRU and is associated with a first data rate;

wherein the first type of resource allocation is available to transmit downlink data until the base station deallocates the first allocation of resources;

the transmitter configured to transmit to the WTRU downlink data according to the first allocation of resources;

the transmitter configured to transmit to the WTRU second control information including a second allocation of resources for downlink data;

wherein the second allocation of resources is a second type of resource allocation;

wherein the second allocation of resources indicates at least a second number of resource blocks assigned to the WTRU and is associated with a second data rate different than the first data rate;

wherein the second type of resource allocation is utilized to transmit downlink data instead of the first type of resource allocation once;

wherein no duration is specified by the second control information; and

the transmitter configured to transmit to the WTRU downlink data according to the second allocation of resources once.