System and method of UE-centric radio access procedure

Patent metadata

Field	Value
Publication number	US-11799607-B2
Application number	US-202117351191-A
Country	US
Kind code	B2
Filing date	Jun 17, 2021
Priority date	May 29, 2015
Publication date	Oct 24, 2023
Grant date	Oct 24, 2023

Abstract

A method and system for operating a user equipment (UE) wherein a first set of radio access procedures are supported when the UE is in a first operating state, and a second set of radio access procedures are supported when the UE is in a second operating state.

First claim

The invention claimed is:

1. A method, at a user equipment device, the method comprising:
receiving, by the user equipment device that is in an energy economizing (ECO) operating state from a network element, a message indicating that there is downlink data to be received, the message being received on a downlink channel monitored by the user equipment device, wherein the message includes an identifier of the user equipment device that is used by the user equipment device in the ECO operating state for receiving the downlink data and that was received by the user equipment device while the user equipment device was in an ACTIVE operating state; and
receiving, by the user equipment device, downlink grant-free transmissions in the ECO operating state, the downlink grant-free transmissions including transmission of the downlink data.

2. The method of claim 1 , wherein the ECO operating state supports maintenance of the identifier of the user equipment device and the ACTIVE operating state exclusively supports a scheduled transmission.

3. The method of claim 1 , wherein the identifier of the user equipment device comprises a dedicated connection ID which is uniquely assigned to the user equipment device.

4. The method of claim 1 , wherein the receiving downlink grant-free transmissions comprises:
performing capability exchange for configuring downlink grant-free transmission mode;
deriving grant-free resource mapping based on broadcast information;
performing blind detection on received data in downlink grant-free transmission channel; and
sending an acknowledgement (ACK) message upon successful data decoding.

5. The method of claim 1 , further comprising sending, from the user equipment device, uplink grant-free transmissions in the ECO operating state or the ACTIVE operating state.

6. The method of claim 5 , wherein the sending uplink grant-free transmissions comprises:
performing capability exchange for configuring uplink grant-free transmission mode;
deriving grant-free resource mapping based on broadcast information;
sending data in pre-defined resources with pre-configured modulation and coding scheme; and
retransmitting upon determination that an initial transmission failed.

7. The method of claim 1 , further comprising:
in response to receiving the message, sending, by the user equipment device to the network element, a user equipment (UE)-centric sequence which is uniquely assigned to the user equipment device by the network element; and
receiving, by the user equipment device from the network element, a response to the UE-centric sequence.

8. The method of claim 7 , after receiving the response from the network element, the method further comprising:
transitioning, by the user equipment device, from the ECO operating state to the ACTIVE operating state.

9. The method of claim 8 comprising:
periodically transmitting from the user equipment device, while in the ECO operating state, a user equipment identifying sequence using an uplink tracking channel resource assignment,
the periodic transmission of the user equipment identifying sequence requiring less wireless network resources than periodic transmission of a user equipment sounding reference signal using a sounding channel resource assignment.

10. The method of claim 8 , wherein the message further includes a flag or bit indicating the transition from the ECO operating state to the ACTIVE operating state.

11. A user equipment device comprising:
one or more processors in communication with a non-transitory memory storing instructions, wherein the one or more processors execute the instructions to:
receive, while the user equipment device is in an energy economizing (ECO) operating state from a network element, a message indicating that there is downlink data to be received, the message being received on a downlink channel monitored by the user equipment device, wherein the message includes an identifier of the user equipment device that is used by the user equipment device in the ECO operating state for receiving the downlink data and that was received by the user equipment device while the user equipment device was in an ACTIVE operating state; and
receive downlink grant-free transmissions in the ECO operating state, the downlink grant-free transmissions including transmission of the downlink data.

12. The user equipment device of 11 , wherein the one or more processors execute the instructions to receive downlink grant-free transmissions comprising: the one or more processors execute the instructions to
perform capability exchange for configuring downlink grant-free transmission mode;
derive grant-free resource mapping based on broadcast information;
perform blind detection on received data in downlink grant-free transmission channel; and
send an acknowledgement (ACK) message upon successful data decoding.

13. The user equipment device of claim 11 , wherein the one or more processors execute the instructions to send uplink grant-free transmissions in the ECO operating state or the ACTIVE operating state.

14. The user equipment device of 13 , wherein the one or more processors execute the instructions to send uplink grant free transmissions comprising:
the one or more processors execute the instructions to:
perform capability exchange for configuring uplink grant-free transmission mode;

derive grant-free resource mapping based on broadcast information;
send data in pre-defined resources with pre-configured modulation and coding scheme; and
retransmit upon determination that an initial transmission failed.

15. The user equipment device of claim 11 , wherein the one or more processors further execute the instructions to:
in response to receiving the message, send, to the network element, a user equipment (UE)-centric sequence which is uniquely assigned to the user equipment device by the network element; and
receive, from the network element, a response to the UE-centric sequence.

16. The user equipment device of claim 15 wherein the one or more processors execute the instructions to:
transition from the ECO operating state to the ACTIVE operating state after receiving the response from the network element.

17. The user equipment device of claim 16 wherein the one or more processors execute the instructions to:
periodically transmit from the user equipment device, while in the ECO operating state, a user equipment identifying sequence using an uplink tracking channel resource assignment,
the periodic transmission of the user equipment identifying sequence requiring less wireless network resources than periodic transmission of a user equipment sounding reference signal using a sounding channel resource assignment.

18. A non-transitory machine readable medium comprising instructions, executable by one or more processors, configuring the one or more processors to:
receive, while a user equipment device including the one or more processors is in an energy economizing (ECO) operating state from a network element, a message indicating that there is downlink data to be received, the message being received on a downlink channel monitored by the user equipment device, wherein the message includes an identifier of the user equipment device that is used by the user equipment device in the ECO operating state for receiving the downlink data and that was received by the user equipment device while the user equipment device was in an ACTIVE operating state; and
receive downlink grant-free transmissions in the ECO operating state, the downlink grant-free transmiss

Assignees

• Au Kelvin Kar Kin
• Zhang Liqing
• Baligh Mohammadhadi
• Ma Jianglei
• Tong Wen
• Huawei Tech Co Ltd

Inventors

• Au Kelvin Kar Kin
• Zhang Liqing
• Baligh Mohammadhadi
• Ma Jianglei
• Tong Wen

Classifications

• H04L5/0051 Primary

  of dedicated pilots, i.e. pilots destined for a single user or terminal · CPC title

• H04W74/006 Primary

  in the downlink, i.e. towards the terminal · CPC title

• H04L5/0073

  Allocation arrangements that take into account other cell interferences · CPC title

• H04W52/0216

  using a pre-established activity schedule, e.g. traffic indication frame · CPC title

• Y02D30/70

  in wireless communication networks · CPC title