Uplink channel selection using channel interference tolerance level feedback for grantless data transmission

• US 10,595,328 B2
• Filed: 07/09/2018
• Issued: 03/17/2020
• Est. Priority Date: 12/02/2015
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Zeng, Wei, Soriaga, Joseph Binamira, Park, Seyong, Ji, Tingfang
• Primary Examiner(s): Anwar, Mohammad S
• Application Number:
  US16/030,592
• Publication Number:
  US 20180324836A1
• Time in Patent Office: 617 Days
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/1268 of uplink data flows
• CPC Class Codes: H04W 72/1273 of downlink data flows
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal

Abstract

Aspects of the present disclosure provide for a network assisted grantless data transmission method operable in a wireless communication network. A wireless device may transmit grantless data without requesting a scheduling entity to grant and schedule network resources prior to the grantless data transmission. A scheduling entity determines interference tolerance information of a plurality of uplink channels, wherein the interference tolerance information is configured to individually indicate an availability of each of the plurality of uplink channels for grantless uplink data transmission. The scheduling entity broadcasts the interference tolerance information to one or more subordinate entities or wireless devices.

Claims

1. A method of operating a data device in a wireless communication network, the method comprising:

receiving, from a scheduling entity, system information configured to provide a grantless access configuration for accessing the wireless communication network, the grantless access configuration comprising a first modulation and coding scheme (MCS); and

receiving, from the scheduling entity, an interference tolerance information that is broadcasted more often than the system information;

selecting an uplink channel among a plurality of uplink channels and a second modulation and coding scheme (MCS) based on the interference tolerance information and the grantless access configuration; and

transmitting grantless data utilizing the selected uplink channel and the second MCS.

2. The method of claim 1, wherein the receiving the interference tolerance information comprises receiving the interference tolerance information in a downlink control channel according to the system information.

3. The method of claim 1, wherein the interference tolerance information is configured to indicate one of three levels of different grantless access for each of the plurality of uplink channels for grantless data transmission.

4. The method of claim 3, wherein the interference tolerance information is configured to dynamically indicate different resources for grantless data transmission based on a loading of the wireless communication network.

5. The method of claim 3, wherein the three levels of different grantless access comprise:

a first level indicating grantless access not allowed;

a second level indicating grantless access allowed with a constraint, wherein the constraint comprises a MCS limit for transmitting data through the corresponding uplink channel; and

a third level indicating grantless access allowed without constraint.

6. The method of claim 1, further comprising:

determining a channel quality of the selected uplink channel; and

determining the second MCS supportable by the channel quality.

7. The method of claim 1, wherein the transmitting the grantless data further comprises transmitting the grantless data without requesting a grant of uplink resources.

8. The method of claim 1, further comprising:

intentionally forgoing receiving the interference tolerance information and transmitting grantless data utilizing a predetermined MCS.

9. A data device for wireless communication, comprising:

a memory;

a communication interface configured for wireless communication; and

a processor operatively coupled to the communication interface and the memory,

wherein the processor and the memory are configured to;

receive, from a scheduling entity via the communication interface, system information configured to provide a grantless access configuration for accessing a wireless communication network; and

receive, from the scheduling entity via the communication interface, an interference tolerance information that is broadcasted more often than the system information;

select an uplink channel among a plurality of uplink channels and a modulation and coding scheme (MCS) based on the interference tolerance information and the grantless access configuration; and

transmit, via the communication interface, grantless data utilizing the selected uplink channel and the MCS.

10. The data device of claim 9, wherein the processor and the memory are further configured to:

receive, via the communication interface, the interference tolerance information in a downlink control channel according to the system information.

11. The data device of claim 9, wherein the interference tolerance information is configured to indicate one of three levels of different grantless access for each of the plurality of uplink channels for grantless data transmission.

12. The data device of claim 11, wherein the interference tolerance information is configured to dynamically indicate different resources for grantless data transmission based on a loading of the wireless communication network.

13. The data device of claim 11, wherein the three levels of different grantless access comprise:

a first level indicating grantless access not allowed;

a second level indicating grantless access allowed with a constraint, wherein the constraint comprises a MCS limit for transmitting data through the corresponding uplink channel; and

a third level indicating grantless access allowed without constraint.

14. The data device of claim 9, wherein the processor and the memory are further configured to:

determine a channel quality of the selected uplink channel; and

determine the MCS supportable by the channel quality.

15. The data device of claim 9, wherein the processor and the memory are further configured to:

transmit, via the communication interface, the grantless data without requesting a grant of uplink resources.

16. The data device of claim 9, wherein the processor and the memory are further configured to:

intentionally forgo receiving the interference tolerance information and transmit grantless data utilizing a predetermined MCS.

17. A scheduling entity configured for wireless communication in a wireless communication network, comprising:

a memory;

a communication interface configured for wireless communication; and

a processor operatively coupled to the communication interface and the memory,

wherein the processor and the memory are configured to;

transmit, via the communication interface, system information configured to provide a grantless access configuration for accessing the wireless communication network, the grantless access configuration comprising a modulation and coding scheme (MCS);

transmit, via the communication interface, an interference tolerance information more often than the system information; and

receive, via the communication interface, grantless data utilizing a selected MCS on a selected uplink channel among a plurality of uplink channels, the selected MCS and the selected uplink channel corresponding to the interference tolerance information and the grantless access configuration.

18. The scheduling entity of claim 17, wherein the processor and the memory, being configured to transmit, via the communication interface, the interference tolerance information, are further configured to transmit, via the communication interface, the interference tolerance information in a downlink control channel according to the system information.

19. The scheduling entity of claim 17, wherein the processor and the memory are further configured to configure the interference tolerance information to indicate one of three levels of different grantless access for each of the plurality of uplink channels for grantless data transmission.

20. The scheduling entity of claim 19, wherein the processor and the memory are further configured to configure the interference tolerance information to dynamically indicate different resources for grantless data transmission based on a loading of the wireless communication network.

21. The scheduling entity of claim 19, wherein the three levels of different grantless access comprise:

a first level indicating grantless access not allowed;

a second level indicating grantless access allowed with a constraint, wherein the constraint comprises an MCS limit for transmitting data through the corresponding uplink channel; and

a third level indicating grantless access allowed without constraint.

22. The scheduling entity of claim 17, wherein the processor and the memory, being configured to receive, via the communication interface, the grantless data, are further configured to receive, via the communication interface, the grantless data without receiving a corresponding request for a grant of uplink resources.

23. The scheduling entity of claim 17, wherein the processor and the memory, being configured to receive, via the communication interface, grantless data, are further configured to receive, via the communication interface, the grantless data utilizing an MCS selected independent of the interference tolerance information.

24. A scheduling entity configured for operation in a wireless communication network, the scheduling entity comprising:

means for transmitting system information configured to provide a grantless access configuration for accessing the wireless communication network, the grantless access configuration comprising a modulation and coding scheme (MCS);

means for transmitting an interference tolerance information more often than the system information; and

means for receiving grantless data utilizing a selected MCS on a selected uplink channel among a plurality of uplink channels, the selected MCS and the selected uplink channel corresponding to the interference tolerance information and the grantless access configuration.

25. The scheduling entity of claim 24, wherein the means for transmitting the interference tolerance information, are further configured for transmitting the interference tolerance information in a downlink control channel according to the system information.

26. The scheduling entity of claim 24, further comprising means for configuring the interference tolerance information to indicate one of three levels of different grantless access for each of the plurality of uplink channels for grantless data transmission.

27. The scheduling entity of claim 26, further comprising means for configuring the interference tolerance information to dynamically indicate different resources for grantless data transmission based on a loading of the wireless communication network.

28. The scheduling entity of claim 26, wherein the three levels of different grantless access comprise:

a first level indicating grantless access not allowed;

a second level indicating grantless access allowed with a constraint, wherein the constraint comprises an MCS limit for transmitting data through the corresponding uplink channel; and

a third level indicating grantless access allowed without constraint.

29. The scheduling entity of claim 24, wherein the means for receiving the grantless data, are further configured for receiving the grantless data without receiving a corresponding request for a grant of uplink resources.

30. The scheduling entity of claim 24, wherein the means for receiving grantless data, are further configured for receiving the grantless data utilizing an MCS selected independent of the interference tolerance information.