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

• US 9,743,422 B2
• Filed: 07/11/2016
• Issued: 08/22/2017
• 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:
  US15/207,301
• Publication Number:
  US 20160323906A1
• Time in Patent Office: 407 Days
• Field of Search: None
• 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 indicating a first allocation of resources, 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;

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

while the first allocation of resources is valid;

the receiver configured to receive second control information indicating a second allocation of resources, 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; and

the transmitter configured to transmit second uplink data according to the second allocation of resources instead of the first allocation of resources for a predetermined time duration, wherein the predetermined time duration is not specified by the second control information.

2. The WTRU of claim 1, wherein the transmitter is further configured to transmit third uplink data according to the first allocation of resources after the predetermined time duration without receiving additional signaling.

3. The WTRU of claim 1, wherein the second allocation of resources overrides the first allocation of resources during the predetermined time duration.

4. The WTRU of claim 1, wherein the first and second control information is received as L1/L2 control information in an orthogonal frequency division multiple access (OFDMA) format.

5. The WTRU of claim 4, wherein the first allocation of resources and the second allocation of resources are distinguished by different identifications (IDs).

6. The WTRU of claim 1, wherein the predetermined time duration is a single subframe.

7. The WTRU of claim 6, wherein the transmitter is further configured to transmit third uplink data according to the first allocation of resources after the single subframe in a next subframe adjacent to the single subframe.

8. The WTRU of claim 1, wherein the transmitter is further configured to transmit retransmissions of uplink data according to the second allocation of resources for the predetermined time duration.

9. 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.

10. The WTRU of claim 1, wherein the transmitter is further configured to utilize the first allocation of resources for transmitting uplink data until the WTRU receives a deallocation of the first allocation of resources.

11. The WTRU of claim 1, wherein the first allocation of resources is valid after the predetermined time duration.

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

a receiver configured to receive first control information indicating a first allocation of resources, 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;

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

while the first allocation of resources is valid;

the receiver configured to receive second control information indicating a second allocation of resources, 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; and

the receiver configured to receive second downlink data according to the second allocation of resources instead of the first allocation of resources for a predetermined time duration, wherein the predetermined time duration is not specified by the second control information.

13. The WTRU of claim 12, wherein the receiver is further configured to receive third downlink data according to the first allocation of resources after the predetermined time duration without receiving additional signaling.

14. The WTRU of claim 12, wherein the second allocation of resources overrides the first allocation of resources during the predetermined time duration.

15. The WTRU of claim 12, wherein the first and second control information is received as L1/L2 control information in an orthogonal frequency division multiple access (OFDMA) format.

16. The WTRU of claim 15, wherein the first allocation of resources and the second allocation of resources are distinguished by different identifications (IDs).

17. The WTRU of claim 12, wherein the predetermined time duration is a single subframe.

18. The WTRU of claim 17, wherein the receiver is further configured to receive third downlink data according to the first allocation of resources after the single subframe in a next subframe adjacent to the single subframe.

19. The WTRU of claim 12, wherein the receiver is further configured to receive retransmissions of downlink data according to the second allocation of resources for the predetermined time duration.

20. The WTRU 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.

21. The WTRU of claim 12, wherein the receiver is further configured to utilize the first allocation of resources for receiving downlink data until the WTRU receives a deallocation of the first allocation of resources.

22. The WTRU of claim 12, wherein the first allocation of resources is valid after the predetermined time duration.

23. A base station comprising:

a transmitter configured to transmit, to a wireless transmit/receive unit (WTRU), a first control information indicating a first allocation of resources, 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;

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

while the first allocation of resources is valid;

the transmitter configured to transmit, to the WTRU, second control information indicating a second allocation of resources, 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; and

the receiver configured to receive, from the WTRU, second uplink data according to the second allocation of resources for a predetermined time duration, wherein the predetermined time duration is not specified by the control information.

24. A base station comprising:

a transmitter configured to transmit, to a wireless transmit/receive unit (WTRU), first control information indicating a first allocation of resources, 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;

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

while the first allocation of resources is valid;

the transmitter configured to transmit, to the WTRU, second control information indicating a second allocation of resources, 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; and

the transmitter configured to transmit, to the WTRU, second downlink data according to the second allocation of resources instead of the first allocation of resources for a predetermined time duration, wherein the predetermined time duration is not specified by the control information.

25. A method performed by a wireless transmit/receive unit (WTRU), the method comprising:

receiving first control information indicating a first allocation of resources, 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;

transmitting first uplink data according to the first allocation of resources;

while the first allocation of resources is valid;

receiving second control information indicating a second allocation of resources, 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; and

transmitting second uplink data according to the second allocation of resources instead of the first allocation of resources for a predetermined time duration, wherein the predetermined time duration is not specified by the second control information.

26. The method of claim 25, further comprising:

transmitting third uplink data according to the first allocation of resources after the predetermined time duration without receiving additional signaling.

27. The method of claim 25, wherein the second allocation of resources overrides the first allocation of resources during the predetermined time duration.

28. The method of claim 25, wherein the first and second control information is received as L1/L2 control information in an orthogonal frequency division multiple access (OFDMA) format.

29. The method of claim 28, wherein the first allocation of resources and the second allocation of resources are distinguished by different identifications (IDs).

30. The method of claim 25, wherein the predetermined time duration is a single subframe.

31. The method of claim 30, further comprising:

transmitting third uplink data according to the first allocation of resources after the single subframe in a next subframe adjacent to the single subframe.

32. The method of claim 25, further comprising:

transmitting retransmissions of uplink data according to the second allocation of resources for the predetermined time duration.

33. The method of claim 25, 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 method of claim 25, wherein the first allocation of resources is utilized for transmitting uplink data until the WTRU receives a deallocation of the first allocation of resources.

35. The method of claim 25, wherein the first allocation of resources is valid after the predetermined time duration.

36. A method performed by a wireless transmit/receive unit (WTRU), the method comprising:

receiving first control information indicating a first allocation of resources, 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;

receiving first downlink data according to the first allocation of resources;

while the first allocation of resources is valid;

receiving second control information indicating a second allocation of resources, 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; and

receiving second downlink data according to the second allocation of resources instead of the first allocation of resources for a predetermined time duration, wherein the predetermined time duration is not specified by the second control information.

37. The method of claim 36, further comprising:

receiving third downlink data according to the first allocation of resources after the predetermined time duration without receiving additional signaling.

38. The method of claim 36, wherein the second allocation of resources overrides the first allocation of resources during the predetermined time duration.

39. The method of claim 36, wherein the first and second control information is received as L1/L2 control information in an orthogonal frequency division multiple access (OFDMA) format.

40. The method of claim 39, wherein the first allocation of resources and the second allocation of resources are distinguished by different identifications (IDs).

41. The method of claim 36, wherein the predetermined time duration is a single subframe.

42. The method of claim 41, further comprising:

receiving third downlink data according to the first allocation of resources after the single subframe in a next subframe adjacent to the single subframe.

43. The method of claim 36, further comprising:

receiving retransmissions of downlink data according to the second allocation of resources for the predetermined time duration.

44. The method of claim 36, 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 36, wherein the first allocation of resources is utilized for receiving downlink data until the WTRU receives a deallocation of the first allocation of resources.

46. The method of claim 36, wherein the first allocation of resources is valid after the predetermined time duration.

47. A method performed by a base station, the method comprising:

transmitting, to a wireless transmit/receive unit (WTRU), a first control information indicating a first allocation of resources, 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;

receiving, from the WTRU, first uplink data according to the first allocation of resources;

while the first allocation of resources is valid;

transmitting, to the WTRU, second control information indicating a second allocation of resources, 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; and

receiving, from the WTRU, second uplink data according to the second allocation of resources for a predetermined time duration, wherein the predetermined time duration is not specified by the control information.

48. A method performed by a base station, the method comprising:

transmitting, to a wireless transmit/receive unit (WTRU), first control information indicating a first allocation of resources, 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;

transmitting, to the WTRU, first downlink data according to the first allocation of resources;

while the first allocation of resources is valid;

transmitting, to the WTRU, second control information indicating a second allocation of resources, 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; and

transmitting, to the WTRU, second downlink data according to the second allocation of resources instead of the first allocation of resources for a predetermined time duration, wherein the predetermined time duration is not specified by the control information.