RESOURCE MANAGEMENT, ACCESS CONTROL AND MOBILITY FOR GRANT-FREE UPLINK TRANSMISSION

• US 20200137825A1
• Filed: 09/25/2019
• Published: 04/30/2020
• Est. Priority Date: 09/26/2018
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Sengupta, Ayan, Phuyal, Umesh, Rico Alvarino, Alberto, Liu, Le
• Granted Patent: US 11,452,168 B2
• Time in Patent Office: Days
• CPC Class Codes: H04J 13/0062 Zadoff-Chu
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04L 5/10 with dynamo-electric generation of carriers; with mechanical filters or demodulators
• CPC Class Codes: H04W 36/0055 Transmission or use of information for re-establishing the radio link
• CPC Class Codes: H04W 36/08 Reselecting an access point
• CPC Class Codes: H04W 36/14 Reselecting a network or an air interface
• CPC Class Codes: H04W 68/005 Transmission of information for alerting of incoming communication
• CPC Class Codes: H04W 68/02 Arrangements for increasing efficiency of notification or paging channel
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• 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 72/51 based on terminal or device properties
• CPC Class Codes: H04W 74/02 Hybrid access
• CPC Class Codes: H04W 74/08 Non-scheduled access, e.g. ALOHA hybrid access H04W74/02
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 76/30 Connection release
• CPC Class Codes: H04W 76/36 for reassigning the resources associated with the released connections

Abstract

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a connection release message, the connection release message including a resource indicator indicating that a set of resources are to be used for grant-free uplink transmissions by the UE while operating in a disconnected state. The UE may transition from a connected state to a disconnected state based at least in part on the connection release message. The UE may perform, while operating in the disconnected state, the grant-free uplink transmissions using the set of resources.

Claims

1. A method for wireless communication at a user equipment (UE), comprising:

receiving a connection release message, the connection release message including a resource indicator indicating that a set of resources are to be used for grant-free uplink transmissions by the UE while operating in a disconnected state;

transitioning from a connected state to a disconnected state based at least in part on the connection release message;

performing, while operating in the disconnected state, the grant-free uplink transmissions using the set of resources;

receiving, from the base station, a transition request message; and

transitioning to the connected state based at least in part on the transition request message.

2. The method of claim 1, further comprising:

skipping a random access procedure when transitioning back to the connected state.

3. The method of claim 1, further comprising:

retaining the set of resources for use while operating in the connected state.

4. A method for wireless communication at a base station, comprising:

configuring a set of resources for a user equipment (UE) to use for grant-free uplink transmissions while the UE is operating in a disconnected state;

transmitting a connection release message that includes a resource indicator to the UE, the resource indicator indicating the set of resources configured for the UE, the connection release message transitioning the UE from a connected state to the disconnected state; and

receiving, while the UE is operating in the disconnected state, the grant-free uplink transmissions from the UE using the set of resources configured for the UE.

5. The method of claim 4, further comprising:

transmitting a release message to the UE de-configuring the set of resources.

6. The method of claim 5, further comprising:

determining that the UE has transitioned from the disconnected state to the connected state, wherein the release message is transmitted based at least in part on the determining.

7. The method of claim 5, further comprising:

determining that a paging message is to be transmitted to the UE, wherein the release message is transmitted based at least in part on the determining and the paging message comprises the release message.

8. The method of claim 7, wherein the paging message comprises a resource release cause.

9. The method of claim 4, further comprising:

transmitting, to the UE, a transition request message transitioning the UE back to the connected state from the disconnected state.

10. The method of claim 9, wherein the transition request message comprises an grant-free uplink transmission acknowledgement message.

11. An apparatus for wireless communication at a user equipment (UE), comprising:

a processor,

memory coupled with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to;

receive a connection release message, the connection release message including a resource indicator indicating that a set of resources are to be used for grant-free uplink transmissions by the UE while operating in a disconnected state;

transition from a connected state to a disconnected state based at least in part on the connection release message;

perform, while operating in the disconnected state, the grant-free uplink transmissions using the set of resources;

receive, from the base station, a transition request message; and

transition to the connected state based at least in part on the transition request message.

12. The apparatus of claim 11, wherein the instructions are further executable by the processor to cause the apparatus to:

skip a random access procedure when transitioning back to the connected state.

13. The apparatus of claim 11, wherein the instructions are further executable by the processor to cause the apparatus to:

retaining the set of resources for use while operating in the connected state.

14. An apparatus for wireless communication at a base station, comprising:

a processor,

memory coupled with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to;

configure a set of resources for a user equipment (UE) to use for grant-free uplink transmissions while the UE is operating in a disconnected state;

transmit a connection release message that includes a resource indicator to the UE, the resource indicator indicating the set of resources configured for the UE, the connection release message transitioning the UE from a connected state to the disconnected state; and

receive, while the UE is operating in the disconnected state, the grant-free uplink transmissions from the UE using the set of resources configured for the UE.

15. The apparatus of claim 14, wherein the instructions are further executable by the processor to cause the apparatus to:

transmit a release message to the UE de-configuring the set of resources.

16. The apparatus of claim 15, wherein the instructions are further executable by the processor to cause the apparatus to:

determine that the UE has transitioned from the disconnected state to the connected state, wherein the release message is transmitted based at least in part on the determining.

17. The apparatus of claim 15, wherein the instructions are further executable by the processor to cause the apparatus to:

determine that a paging message is to be transmitted to the UE, wherein the release message is transmitted based at least in part on the determining and the paging message comprises the release message.

18. The apparatus of claim 17, wherein the paging message comprises a resource release cause.

19. The apparatus of claim 14, wherein the instructions are further executable by the processor to cause the apparatus to:

transmit, to the UE, a transition request message transitioning the UE back to the connected state from the disconnected state.

20. The apparatus of claim 19, wherein the transition request message comprises an grant-free uplink transmission acknowledgement message.

21. An apparatus for wireless communication at a user equipment (UE), comprising:

means for receiving a connection release message, the connection release message including a resource indicator indicating that a set of resources are to be used for grant-free uplink transmissions by the UE while operating in a disconnected state;

means for transitioning from a connected state to a disconnected state based at least in part on the connection release message;

means for performing, while operating in the disconnected state, the grant-free uplink transmissions using the set of resources;

means for receiving, from the base station, a transition request message; and

means for transitioning to the connected state based at least in part on the transition request message.

22. An apparatus for wireless communication at a base station, comprising:

means for configuring a set of resources for a user equipment (UE) to use for grant-free uplink transmissions while the UE is operating in a disconnected state;

means for transmitting a connection release message that includes a resource indicator to the UE, the resource indicator indicating the set of resources configured for the UE, the connection release message transitioning the UE from a connected state to the disconnected state; and

means for receiving, while the UE is operating in the disconnected state, the grant-free uplink transmissions from the UE using the set of resources configured for the UE.

23. A non-transitory computer-readable medium storing code for wireless communication at a user equipment (UE), the code comprising instructions executable by a processor to:

receive a connection release message, the connection release message including a resource indicator indicating that a set of resources are to be used for grant-free uplink transmissions by the UE while operating in a disconnected state;

transition from a connected state to a disconnected state based at least in part on the connection release message;

perform, while operating in the disconnected state, the grant-free uplink transmissions using the set of resources;

receive, from the base station, a transition request message; and

transition to the connected state based at least in part on the transition request message.

24. A non-transitory computer-readable medium storing code for wireless communication at a base station, the code comprising instructions executable by a processor to:

configure a set of resources for a user equipment (UE) to use for grant-free uplink transmissions while the UE is operating in a disconnected state;

transmit a connection release message that includes a resource indicator to the UE, the resource indicator indicating the set of resources configured for the UE, the connection release message transitioning the UE from a connected state to the disconnected state; and

receive, while the UE is operating in the disconnected state, the grant-free uplink transmissions from the UE using the set of resources configured for the UE.