NETWORK ASSISTANCE FOR DISTRIBUTED UNSCHEDULED TRANSMISSIONS

• US 20170171855A1
• Filed: 06/23/2016
• Published: 06/15/2017
• Est. Priority Date: 12/11/2015
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Sundararajan, Jay Kumar, Ji, Tingfang, Jiang, Jing
• Application Number:
  US15/191,370
• Publication Number:
  US 20170171855A1
• Time in Patent Office: Days
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04W 36/30 by measured or perceived connection quality data
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 74/08 Non-scheduled access, e.g. ALOHA hybrid access H04W74/02

Abstract

Aspects of the present disclosure provide network assistance for distriuted unscheduled transmissions. A scheduling entity may provide unscheduled assistance information to a subordinate entity indicating a respective probability for use in selecting each resource from a subset of available resources for an unscheduled uplink transmissions. The subordinate entity may select at least one resource from the available resources for the unscheduled uplink transmission based on the unscheduled assistance information.

Claims

1. A method for transmitting unscheduled uplink transmissions, comprising:

receiving unscheduled assistance information from a scheduling entity, wherein the unscheduled assistance information comprises, for at least a subset of available resources, a respective probability for use in selecting each resource from the subset of available resources;

selecting at least one selected resource from the available resources for an unscheduled uplink transmission based on the unscheduled assistance information; and

transmitting the unscheduled uplink transmission using the at least one selected resource.

2. The method of claim 1, wherein the at least one selected resource comprises at least one of a time slot, a frequency, a transmit power setting, a modulation and coding scheme, or a MIMO beamforming setting.

3. The method of claim 1, wherein the unscheduled assistance information further comprises at least one of time resource information, frequency resource information, transmit power setting information, modulation and coding scheme information, or multiple-input-multiple-output (MIMO) pre-coding and rank choice information.

4. The method of claim 3, wherein the unscheduled assistance information comprises a combination of at least two of the time resource information, the frequency resource information, the transmit power setting information, the modulation and coding scheme information, or the multiple-input-multiple-output (MIMO) pre-coding and rank choice information.

5. The method of claim 1, wherein the unscheduled assistance information further indicates the respective probability for use in selecting one or more of time slots, frequencies, transmit power settings, modulation and coding schemes, or MIMO beamforming settings for unscheduled uplink transmissions.

6. The method of claim 1, wherein the unscheduled assistance information further comprises a non-uniform probability distribution.

7. The method of claim 1, wherein the unscheduled assistance information further indicates the respective probability for use in selecting each combination of two or more of time slots, frequencies, transmit power settings, modulation and coding schemes, or MIMO beamforming settings for unscheduled uplink transmissions.

8. The method of claim 1, wherein the unscheduled assistance information further comprises utilized resource information, the utilized resource information indicating at least one of uplink resources in use for at least one of other scheduled uplink transmissions or other unscheduled uplink transmissions or uplink resources expected to be in use for at least one of other scheduled uplink transmissions or other unscheduled uplink transmissions.

9. The method of claim 1, wherein receiving the unscheduled assistance information from the scheduling entity further comprises:

receiving the unscheduled assistance information from the scheduling entity in a unicast message or a broadcast message.

10. The method of claim 1, wherein receiving the unscheduled assistance information from the scheduling entity further comprises:

receiving a respective control message including respective unscheduled assistance information in each subframe.

11. The method of claim 1, further comprising:

generating the unscheduled uplink transmission in response to determining that data to be transmitted to the scheduling entity relates to a mission critical application.

12. The method of claim 1, wherein the at least one selected resource is outside of the subset of available resources.

13. A user equipment for communicating with a scheduling entity in a wireless communication network, comprising:

a wireless transceiver configured to communicate with the scheduling entity;

a memory; and

a processor communicatively coupled to the wireless transceiver and the memory, the processor configured to;

determine available resources for communicating with the scheduling entity on an uplink carrier;

receive unscheduled assistance information from the scheduling entity via the wireless transceiver, wherein the unscheduled assistance information comprises, for at least a subset of available resources, a respective probability for use in selecting each resource from the subset of available resources for unscheduled uplink transmissions;

select at least one selected resource from the available resources for an unscheduled uplink transmission based on the unscheduled assistance information; and

transmit the unscheduled uplink transmission to the scheduling entity via the wireless transceiver, the unscheduled uplink transmission utilizing the at least one selected resource.

14. The user equipment of claim 13, wherein the at least one selected resource comprises at least one of a time slot, a frequency, a transmit power setting, a modulation and coding scheme, or a MIMO beamforming setting.

15. The user equipment of claim 13, wherein the unscheduled assistance information further comprises at least one of time resource information, frequency resource information, transmit power setting information, modulation and coding scheme information, or multiple-input-multiple-output (MIMO) pre-coding and rank choice information.

16. The user equipment of claim 13, wherein the unscheduled assistance information further indicates the respective probability for use in selecting one or more of time slots, frequencies, transmit power settings, modulation and coding schemes, or MIMO beamforming settings for unscheduled uplink transmissions.

17. The user equipment of claim 13, wherein the unscheduled assistance information further comprises a non-uniform probability distribution.

18. The user equipment of claim 13, wherein the unscheduled assistance information further indicates the respective probability for use in selecting each combination of two or more of time slots, frequencies, transmit power settings, modulation and coding schemes, or MIMO beamforming settings for unscheduled uplink transmissions.

19. The user equipment of claim 13, wherein the unscheduled assistance information further comprises utilized resource information, the utilized resource information indicating at least one of uplink resources in use for at least one of other scheduled transmissions or other unscheduled transmissions or uplink resources expected to be in use for at least one of other scheduled transmissions or other unscheduled transmissions.

20. The user equipment of claim 13, wherein the processor is further configured to receive the unscheduled assistance information by:

receiving the unscheduled assistance information in a unicast message or a broadcast message.

21. The user equipment of claim 13, wherein the processor is further configured to receive the unscheduled assistance information by:

receiving a respective control message including respective unscheduled assistance information in each subframe.

22. The user equipment of claim 13, wherein the processor is further configured to:

generate the unscheduled uplink transmission in response to determining that data to be transmitted to the scheduling entity relates to a mission critical application.

23. A subordinate entity apparatus for communicating with a scheduling entity in a wireless communication network, comprising:

means for receiving unscheduled assistance information from the scheduling entity, wherein the unscheduled assistance information comprises, for at least a subset of available resources, a respective probability for use in selecting each resource from the subset of available resources;

means for selecting at least one selected resource from the available resources for an unscheduled uplink transmission based on the unscheduled assistance information; and

means for transmitting the unscheduled uplink transmission to the scheduling entity, the unscheduled uplink transmission utilizing the at least one selected resource.

24. The subordinate entity apparatus of claim 23, wherein the unscheduled assistance information further comprises at least one of time resource information, frequency resource information, transmit power setting information, modulation and coding scheme information, or multiple-input-multiple-output (MIMO) pre-coding and rank choice information.

25. The subordinate entity apparatus of claim 23, wherein the unscheduled assistance information further indicates the respective probability for use in selecting one or more of time slots, frequencies, transmit power settings, modulation and coding schemes, or MIMO beamforming settings for unscheduled uplink transmissions.

26. The subordinate entity apparatus of claim 23, wherein the unscheduled assistance information further comprises utilized resource information, the utilized resource information indicating uplink resources in use for at least one of other scheduled transmissions or other unscheduled transmissions.

27. The subordinate entity apparatus of claim 23, wherein the means for receiving the unscheduled assistance information further comprises:

means for receiving the unscheduled assistance information in a unicast message or a broadcast message.

28. The subordinate entity apparatus of claim 23, wherein the means for receiving the unscheduled assistance information further comprises:

means for receiving a respective control message including respective unscheduled assistance information in each subframe.

29. A non-transitory computer-readable medium storing computer executable code, comprising code for:

receiving unscheduled assistance information from the scheduling entity, wherein the unscheduled assistance information comprises, for at least a subset of available resources, a respective probability for use in selecting each resource from the subset of available resources;

selecting at least one selected resource from the available resources for an unscheduled uplink transmission based on the unscheduled assistance information; and

transmitting the unscheduled uplink transmission using the at least one selected resource.

30. The non-transitory computer-readable medium of claim 29, wherein the unscheduled assistance information further comprises at least one of time resource information, frequency resource information, transmit power setting information, modulation and coding scheme information, multiple-input-multiple-output (MIMO) pre-coding and rank choice information or utilized resource information indicating uplink resources in use for other uplink transmissions.

31. A method for a scheduling entity to support unscheduled uplink transmissions, the method comprising:

determining unscheduled assistance information comprising, for at least a subset of available resources, a respective probability for use by a set of one or more subordinate entities in selecting each resource from the subset of available resources for unscheduled uplink transmissions;

transmitting a control message including the unscheduled assistance information to the set of one or more subordinate entities; and

receiving an unscheduled uplink transmission from a subordinate entity of the set of one or more subordinate entities, the unscheduled uplink transmission utilizing at least one selected resource from the available resources selected by the subordinate entity based on the unscheduled assistance information.

32. The method of claim 31, wherein the at least one selected resource comprises at least one of a time slot, a frequency, a transmit power setting, a modulation and coding scheme, or a MIMO beamforming setting.

33. The method of claim 31, wherein the unscheduled assistance information further comprises at least one of time resource information, frequency resource information, transmit power setting information, modulation and coding scheme information, or multiple-input-multiple-output (MIMO) pre-coding and rank choice information.

34. The method of claim 33, wherein the unscheduled assistance information comprises a combination of at least two of the time resource information, the frequency resource information, the transmit power setting information, the modulation and coding scheme information, or the multiple-input-multiple-output (MIMO) pre-coding and rank choice information.

35. The method of claim 31, wherein the unscheduled assistance information further indicates the respective probability for use by the set of one or more subordinate entities in selecting one or more of time slots, frequencies, transmit power settings, modulation and coding schemes, or MIMO beamforming settings for unscheduled uplink transmissions.

36. The method of claim 31, wherein the unscheduled assistance information further comprises a non-uniform probability distribution.

37. The method of claim 31, wherein the unscheduled assistance information further indicates the respective probability for use by the set of one or more subordinate entities in selecting each combination of two or more of time slots, frequencies, transmit power settings, modulation and coding schemes, or MIMO beamforming settings for unscheduled uplink transmissions.

38. The method of claim 31, wherein the unscheduled assistance information further comprises utilized resource information, the utilized resource information indicating at least one of uplink resources in use for at least one of other scheduled uplink transmissions or other unscheduled uplink transmissions or uplink resources expected to be in use for at least one of other scheduled uplink transmissions or other unscheduled uplink transmissions.

39. The method of claim 31, wherein transmitting the control message including the unscheduled assistance information to the set of one or more subordinate entities further comprises:

transmitting the control message including the unscheduled assistance information to the set of one or more subordinate entities in a unicast message or a broadcast message.

40. The method of claim 31, wherein transmitting the control message including the unscheduled assistance information to the set of one or more subordinate entities further comprises:

transmitting a respective control message including respective unscheduled assistance information in each subframe.

41. The method of claim 31, further comprising:

receiving additional unscheduled assistance information from another scheduling entity; and

wherein determining the unscheduled assistance information further comprises determining the unscheduled assistance information based on the additional distributed unscheduled assistance information.

42. The method of claim 31, further comprising:

transmitting the unscheduled assistance information to one or more other scheduling entities.

43. A scheduling entity configured to manage wireless communication with a set of one or more subordinate entities in a wireless communication network, comprising:

a wireless transceiver configured to communicate with the set of subordinate entities;

a memory; and

a processor communicatively coupled to the wireless transceiver and the memory, the processor configured to;

determine available resources for communicating with the set of one or more subordinate entities on an uplink carrier;

determine unscheduled assistance information comprising, for at least a subset of the available resources, a respective probability for use by the set of one or more subordinate entities in selecting each resource from the subset of available resources for unscheduled uplink transmissions;

transmit a control message including the unscheduled assistance information to the set of one or more subordinate entities via the wireless transceiver; and

receive an unscheduled uplink transmission from a subordinate entity of the set of one or more subordinate entities via the wireless transceiver, the unscheduled uplink transmission utilizing at least one selected resource from the available resources selected by the subordinate entity based on the unscheduled assistance information.

44. The scheduling entity of claim 43, wherein the at least one selected resource comprises at least one of a time slot, a frequency, a transmit power setting, a modulation and coding scheme, or a MIMO beamforming setting.

45. The scheduling entity of claim 43, wherein the unscheduled assistance information further comprises at least one of time resource information, frequency resource information, transmit power setting information, modulation and coding scheme information, or multiple-input-multiple-output (MIMO) pre-coding and rank choice information.

46. The scheduling entity of claim 43, wherein the unscheduled assistance information further indicates the respective probability for use by the set of one or more subordinate entities in selecting one or more of time slots, frequencies, transmit power settings, modulation and coding schemes, or MIMO beamforming settings for unscheduled uplink transmissions.

47. The scheduling entity of claim 43, wherein the unscheduled assistance information further comprises a non-uniform probability distribution.

48. The scheduling entity of claim 43, wherein the unscheduled assistance information further indicates the respective probability for use by the set of one or more subordinate entities in selecting each combination of two or more of time slots, frequencies, transmit power settings, modulation and coding schemes, or MIMO beamforming settings for unscheduled uplink transmissions.

49. The scheduling entity of claim 43, wherein the unscheduled assistance information further comprises utilized resource information, the utilized resource information indicating at least one of uplink resources in use for at least one of other scheduled transmissions or other unscheduled transmissions or uplink resources expected to be in use for at least one of other scheduled transmissions or other unscheduled transmissions.

50. The scheduling entity of claim 43, wherein the processor is further configured to transmit the control message including the unscheduled assistance information to the set of one or more subordinate entities by:

transmitting the control message including the unscheduled assistance information to the set of one or more subordinate entities in a unicast message or a broadcast message.

51. The scheduling entity of claim 43, wherein the processor is further configured to transmit the control message including the unscheduled assistance information to the set of one or more subordinate entities by:

transmitting a respective control message including respective unscheduled assistance information in each subframe.

52. The scheduling entity of claim 43, wherein the processor is further configured to:

receive additional unscheduled assistance information from another scheduling entity; and

wherein the processor is further configured to determine the unscheduled assistance information by utilizing the additional unscheduled assistance information to determine the unscheduled assistance information.

53. The scheduling entity of claim 43, wherein the processor is further configured to:

transmit the unscheduled assistance information to one or more other scheduling entities.

54. A scheduling entity apparatus configured to manage wireless communication with a set of subordinate entities in a wireless communication network, comprising:

means for determining unscheduled assistance information comprising, for at least a subset of available resources, a respective probability for use by a set of one or more subordinate entities in selecting each resource from the subset of available resources for unscheduled uplink transmissions;

means for transmitting a control message including the unscheduled assistance information to the set of one or more subordinate entities; and

means for receiving an unscheduled uplink transmission from a subordinate entity of the set of one or more subordinate entities, the unscheduled uplink transmission utilizing at least one selected resource from the available resources selected by the subordinate entity based on the unscheduled assistance information.

55. The scheduling entity apparatus of claim 54, wherein the unscheduled assistance information further comprises at least one of time resource information, frequency resource information, transmit power setting information, modulation and coding scheme information, or multiple-input-multiple-output (MIMO) pre-coding and rank choice information.

56. The scheduling entity apparatus of claim 54, wherein the unscheduled assistance information further indicates the respective probability for use by the set of one or more subordinate entities in selecting one or more of time slots, frequencies, transmit power settings, modulation and coding schemes, or MIMO beamforming settings for unscheduled uplink transmissions.

57. The scheduling entity apparatus of claim 54, wherein the unscheduled assistance information further comprises utilized resource information, the utilized resource information indicating uplink resources in use for at least one of other scheduled transmissions or other unscheduled transmissions.

58. The scheduling entity apparatus of claim 54, wherein the means for transmitting the control message including the unscheduled assistance information to the set of one or more subordinate entities further comprises:

means for transmitting the control message including the unscheduled assistance information to the set of one or more subordinate entities in a unicast message or a broadcast message.

59. The scheduling entity apparatus of claim 54, wherein the means for transmitting the control message including the unscheduled assistance information to the set of one or more subordinate entities further comprises:

means for transmitting a respective control message including respective unscheduled assistance information in each subframe.

60. The scheduling entity apparatus of claim 54, further comprising:

means for receiving additional unscheduled assistance information from another scheduling entity; and

wherein the means for determining the unscheduled assistance information further comprises means for determining the unscheduled assistance information based on the additional distributed unscheduled assistance information.

61. The scheduling entity apparatus of claim 54, further comprising:

means for transmitting the unscheduled assistance information to one or more other scheduling entities.