System and method of UE-centric radio access procedure

• US 10,735,166 B2
• Filed: 05/26/2016
• Issued: 08/04/2020
• Est. Priority Date: 05/29/2015
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Au, Kelvin Kar Kin, Zhang, Liqing, Baligh, Mohammadhadi, Ma, Jianglei, Tong, Wen
• Primary Examiner(s): Mills, Donald L
• Application Number:
  US15/165,985
• Publication Number:
  US 20160353453A1
• Time in Patent Office: 1,531 Days
• Field of Search: None
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal
• CPC Class Codes: Y02D 30/70 in wireless communication networks

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.

Claims

1. A method, at a user equipment (UE) device, the method comprising:

receiving, by the user equipment device that is in an ECO operating state, a message indicating that there is downlink data to be sent to the user equipment device, the message being received on a downlink channel monitored by the user equipment device, wherein the message further indicates a transition of the user equipment device from the ECO operating state to an ACTIVE operating state and the message includes an identifier of the user equipment device, wherein the identifier of the user equipment device was received by the user equipment device while the user equipment device was in the ACTIVE operating state; and

transitioning from the ECO operating state to the ACTIVE operating state.

2. The method of claim 1 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.

3. The method of claim 1, wherein the transitioning from the ECO operating state to the ACTIVE operating state comprises:

sending a UE-centric sequence to a network element;

receiving a response from the network element; and

transitioning to the ACTIVE operating state.

4. 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.

5. The method of claim 1, wherein the message further includes a flag or bit indicating the transition from the ECO operating state to the ACTIVE operating state.

6. 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.

7. The method of claim 1, further comprising receiving, at the user equipment device, downlink grant-free transmissions in the ECO operating state or the ACTIVE operating state.

8. 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.

9. The method of claim 7, 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.

10. The method of claim 8, 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.

11. A user equipment device comprising:

a non-transitory memory storage comprising instructions; and

one or more processors in communication with the memory, wherein the one or more processors execute the instructions to;

receive, while the user equipment device is in an ECO operating state, a message that there indicating is downlink data to be sent to the user equipment device, the message being received on a downlink channel monitored by the user equipment device, wherein the message further indicates a transition of the user equipment device from the ECO operating state to an ACTIVE operating state and the message includes an identifier of the user equipment device, wherein the identifier of the user equipment device was received by the user equipment device while the user equipment device was in the ACTIVE operating state; and

transition from the ECO operating state to the ACTIVE operating state.

12. The user equipment device of claim 11 wherein the user equipment device is configured 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.

13. The user equipment device of claim 11, wherein the one or more processors execute the instructions to transition from the ECO operating state to the ACTIVE operating state comprising:

the one or more processors execute the instructions to send a UE-centric sequence to a network element;

receive a response from the network element; and

transition to the ACTIVE operating state.

14. The user equipment device of claim 11, the ECO operating state supports maintenance of the identifier of the user equipment device and the ACTIVE operating state exclusively supports a scheduled transmission.

15. The user equipment device of claim 11, wherein the paging message further includes a flag or bit indicating the transition from the ECO operating state to the ACTIVE operating state.

16. The user equipment device of claim 11, wherein the identifier of the user equipment device comprises a dedicated connection ID which is uniquely assigned to the user equipment device.

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

18. 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.

19. The user equipment device of 73, 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.

20. The user equipment device of 74, 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.