System and method of ue-centric radio access procedure

Patent metadata

Field	Value
Publication number	US-2016353453-A1
Application number	US-201615165985-A
Country	US
Kind code	A1
Filing date	May 26, 2016
Priority date	May 29, 2015
Publication date	Dec 1, 2016
Grant date	—

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

1 . A method for operating a user equipment device that is enabled to transition between at least a first operating state that supports a first set of radio access procedures and a second operating state that supports a second set of radio access procedures, the method comprising:
performing an initial access procedure, while the user equipment device is in the first operating state, to establish a first set of radio access parameters for the user equipment device to use while in the first operating state and a second set of radio access parameters for the user equipment device to use while in the second operating state; and transitioning from the first operating state to the second operating state and transmitting using the second set of radio access parameters.

2 . The method of claim 1 wherein establishing the first and second sets of radio access parameters comprises receiving the first and second sets of radio access parameters at the user equipment device from a wireless network entity.

3 . The method of claim 1 wherein the radio access parameters include a user equipment identifier for the user equipment device to use in both the first operating state and the second operating state.

4 . The method of claim 1 wherein the first set of radio access parameters includes a user equipment sounding reference signal and a sounding channel resource assignment for the user equipment device, and the second set of radio access parameters includes a user equipment identifying sequence and an uplink tracking channel resource assignment for the user equipment device.

5 . The method of claim 4 comprising:
periodically transmitting from the user equipment device, while in the first operating state, the user equipment sounding reference signal using the sounding channel resource assignment; and
transmitting from the user equipment device, while in the second operating state, the user equipment identifying sequence using the uplink tracking channel resource assignment, the periodic transmission of the user equipment identifying sequence requiring less wireless network resources than the periodic transmitting of the user equipment sounding reference signal.

6 . The method of claim 1 comprising monitoring, at the user equipment device, for downlink grant-free transmissions in both the first operating state and the second operating state.

7 . The method of claim 1 comprising sending, from the user equipment device, uplink grant free transmissions in both the first operating state and the second operating state.

8 . The method of claim 1 comprising, at the user equipment device:
transitioning from the second operating state to the first operating state upon receiving a message on a data downlink channel monitored by the user equipment device that there is downlink data for the user equipment device requiring that the user equipment device transition from the second operating state to the first operating state;
receiving the downlink data while in the first operating state.

9 . The method of claim 8 wherein the message comprises a unicast message that includes an identifier for the user equipment device and a flag indicating that a state transition is required.

10 . A user equipment device for operating in a wireless network, comprising:
a wireless network interface for sending and receiving radio frequency signals through the wireless network; a processor coupled to the wireless network interface ; a memory coupled to the processor, the memory storing executable instructions that, when executed by the processor, enable the user equipment device to: transition, upon the occurrence of predetermined events, between a first operating state that supports a first set of radio access procedures and a second operating state that supports a second set of radio access procedures; and perform an initial access procedure, while the user equipment device is in the first operating state, to establish a first set of radio access parameters for the user equipment device to use while in the first operating state and a second set of radio access parameters for the user equipment device to use while in the second operating state.

11 . The user equipment device of claim 10 wherein the user equipment device is configured to establish the first and second sets of radio access parameters by receiving the network access parameters at the user equipment device from a network entity through the wireless network.

12 . The user equipment device of claim 10 wherein the radio access parameters includes a user equipment identifier for the user equipment device to use in both the first operating state and the second operating state.

13 . The user equipment device of claim 10 wherein the first set of radio access parameters includes a user equipment sounding reference signal and a sounding channel resource assignment for the user equipment device, and the second set of radio access parameters includes a user equipment identifying sequence and an uplink tracking channel resource assignment for the user equipment device.

14 . The user equipment device of claim 13 wherein the user equipment device is configured to:
periodically transmit from the user equipment device, while in the first operating state, the user equipment sounding reference signal using the sounding channel resource assignment; and
periodically transmit from the user equipment device, while in the second operating state, the user equipment identifying sequence using the uplink tracking channel resource assignment,
the periodic transmission of the user equipment identifying sequence requiring less wireless network resources than the periodic transmitting of the user equipment sounding reference signal.

15 . The user equipment device of claim 13 wherein the user equipment device is configured to:
provide always on-connectivity through the wireless network interface in both the first and second operating states by: sending the user equipment sounding reference signal using the sounding channel resource assignment in the first operating state but not the second operating state; and sending the user equipment identifying sequence using the uplink tracking channel resource assignment while in the second operating state;
support grant-free uplink and downlink transmissions for data below predefined thresholds in both the first operating state and the second operating state; and
monitor a downlink data notification channel while in the second operating state for an indication to transition to first operating state.

16 . The user equipment device claim 10 wherein the user equipment device is configured to monitor for downlink grant-free transmissions in both the first operating state and the second operating state.

17 . The user equipment device of claim 10 wherein the user equipment device is configured to send uplink grant free transmissions in both the first operating state and the second operating state.

18 . The user equipment device of claim 10 wherein the user equipment device is configured to:
transition from the second operating state to the first operating state upon receiving a message on a data downlink channel monitored by the user equipment device that there is downlink data for the user equipment device requiring that the user equipment device transition from the second operating state to the first operating state;
receive the downlink data while in the first operating state.

19 . The user equipment device of claim 18 wherein the message comprises a unicast mess

Assignees

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

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

• H04W72/00

  Local resource management · CPC title

• H04W72/082 Primary

  Electricity · mapped topic