Grant-less operations

• US 10,687,354 B2
• Filed: 04/15/2019
• Issued: 06/16/2020
• Est. Priority Date: 06/15/2016
• Status: Active Grant

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: Convida Wireless LLC
• Inventors: Li, Qing, Zhang, Guodong, Adjakple, Pascal M., Tsai, Allan Y., Zhang, Qian, Iyer, Lakshmi R., Chen, Wei, Murray, Joseph M., Xu, Tianyi
• Primary Examiner(s): Kamara, Mohamed A
• Application Number:
  US16/384,337
• Publication Number:
  US 20190313443A1
• Time in Patent Office: 428 Days
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 56/0045 compensating for timing error by altering transmission time
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/51 based on terminal or device properties
• CPC Class Codes: H04W 74/004 in the uplink, i.e. towards network
• CPC Class Codes: H04W 74/08 Non-scheduled access, e.g. ALOHA hybrid access H04W74/02
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Current approaches to transmitting uplink data in a network often require resources to be granted. In an example, a node or apparatus may configure a plurality of devices to operate in a grant-less mode in accordance with a respective grant-less access allocation. Grant-less operations may be managed, for example, to meet the reliability and latency requirements and battery life requirements for different types of devices. For example, the state transition between grant-less and grant based may be managed.

Claims

1. An apparatus comprising a processor, a memory, and communication circuitry, the apparatus being connected to an access network via its communication circuitry, the apparatus further comprising computer-executable instructions stored in the memory of the apparatus which, when executed by the processor of the apparatus, cause the apparatus to perform operations comprising:

receiving an indication of one or more access allocations for grant-less transmissions;

selecting an access allocation of the one or more access allocations so as to define a selected access allocation;

determining a first transmit power level for a grant-less transmission;

transmitting, at the first transmit power level, a first uplink message over the selected access allocation without requesting an uplink grant, so as to transmit the grant-less transmission;

receiving, from the access network, feedback information for the grant-less transmission, the feedback information including a transition indication and a power control indication;

determining a uplink transmission mode to be set as one of the grant-less transmission or a uplink grant transmission;

determining, based on the power control indication, a second transmit power level for the determined transmission mode;

transmitting, at the second transmit power level, a second uplink message as the determined uplink transmission mode.

2. The apparatus as recited in claim 1, wherein the second uplink message corresponds to the first uplink message so that the apparatus can perform a retransmission in the determined uplink transmission mode.

3. The apparatus as recited in claim 2, wherein the determined uplink transmission mode corresponds to the uplink grant transmission.

4. The apparatus as recited in claim 2, the apparatus further comprising computer-executable instructions stored in the memory of the apparatus which, when executed by the processor of the apparatus, cause the apparatus to perform further operations comprising:

determining to perform the retransmission in response to a grant-less transmission timer expiring.

5. The apparatus as recited in claim 1, wherein the feedback information is transmitted in downlink control channel for the grant-less transmission.

6. The apparatus as recited in claim 1, wherein determining the first transmit power level and the second transmit power level comprises performing a path loss estimation.

7. The apparatus as recited in claim 6, the apparatus further comprising computer-executable instructions stored in the memory of the apparatus which, when executed by the processor of the apparatus, cause the apparatus to perform further operations comprising:

receiving a synchronization signal or a reference signal from the access network; and

using the synchronization signal or the reference signal to perform the path loss estimation.

8. The apparatus as recited in claim 1, wherein determining the first transmit power level and the second transmit power level further comprises performing a modulation and coding scheme for the grant-less transmission.

9. An apparatus comprising a processor, a memory, and communication circuitry, the apparatus being connected to a user equipment via its communication circuitry, the apparatus further comprising computer-executable instructions stored in the memory of the apparatus which, when executed by the processor of the apparatus, cause the apparatus to perform operations comprising:

sending an indication of one or more access allocations for grant-less transmissions;

selecting an access allocation of the one or more access allocations so as to define a selected access allocation;

receiving a first uplink message over the selected access allocation without requesting an uplink grant, the first uplink message being sent by the user equipment at a first transmit power level for a grant-less transmission;

transmitting, to the user equipment, feedback information for the grant-less transmission, the feedback information including a transition indication and a power control indication;

receiving, at a second transmit power level, a second uplink message as a determined uplink transmission mode,

wherein the determined uplink transmission mode is set as one of the grant-less transmission or a uplink grant transmission based on the feedback information,

and the second transmit power level for the determined transmission mode is determined based on the power control indication.

10. The apparatus as recited in claim 9, wherein the second uplink message corresponds to the first uplink message so that the apparatus can perform a retransmission in the determined uplink transmission mode.

11. The apparatus as recited in claim 10, wherein the determined uplink transmission mode corresponds to the uplink grant transmission.

12. The apparatus as recited in claim 11, the apparatus further comprising computer-executable instructions stored in the memory of the apparatus which, when executed by the processor of the apparatus, cause the apparatus to perform further operations comprising:

determining to perform the retransmission in response to a grant-less transmission timer expiring.

13. The apparatus as recited in claim 9, wherein the feedback information is transmitted in downlink control channel for the grant-less transmission.

14. The apparatus as recited in claim 9, wherein the first transmit power level and the second transmit power level are determined by performing a path loss estimation.

15. The apparatus as recited in claim 14, the apparatus further comprising computer-executable instructions stored in the memory of the apparatus which, when executed by the processor of the apparatus, cause the apparatus to perform further operations comprising:

transmitting, to the user equipment, a synchronization signal or a reference signal from the access network, wherein the user equipment is configured to use the synchronization signal or the reference signal to perform the path loss estimation.

16. The apparatus as recited in claim 15, wherein the first transmit power level and the second transmit power level are determined by performing a modulation and coding scheme for the grant-less transmission.

17. A method for wireless communication with a user equipment, the method comprising:

sending an indication of one or more access allocations for grant-less transmissions;

selecting an access allocation of the one or more access allocations so as to define a selected access allocation;

receiving a first uplink message over the selected access allocation without requesting an uplink grant, the first uplink message being sent by the user equipment at a first transmit power level for a grant-less transmission;

transmitting, to the user equipment, feedback information for the grant-less transmission, the feedback information including a transition indication and a power control indication;

receiving, at a second transmit power level, a second uplink message as a determined uplink transmission mode,

wherein the determined uplink transmission mode is set as one of the grant-less transmission or a uplink grant transmission based on the feedback information,

and the second transmit power level for the determined transmission mode is determined based on the power control indication.