Transmitting a beam recovery request

Patent metadata

Field	Value
Publication number	US-2020186218-A1
Application number	US-201716623082-A
Country	US
Kind code	A1
Filing date	Jun 15, 2017
Priority date	Jun 15, 2017
Publication date	Jun 11, 2020
Grant date	—

Abstract

Apparatuses, methods, and systems are disclosed for transmitting a beam recovery request. One apparatus ( 200 ) includes a receiver ( 212 ) that receives ( 402 ) information indicating a resource configured for a beam recovery request. The apparatus ( 200 ) includes a transmitter ( 210 ) that transmits ( 404 ) the beam recovery request on the resource in response to a first trigger condition.

First claim

1 . A method comprising:
receiving information indicating a resource configured for a beam recovery request; and transmitting the beam recovery request on the resource in response to a first trigger condition.

2 . The method of claim 1 , wherein the first trigger condition comprises a medium access control layer receiving a number of out-of-sync indications from a physical layer.

3 . The method of claim 1 , wherein the resource configured for the beam recovery request is configured by radio resource control signaling.

4 . The method of claim 3 , wherein the resource configured for the beam recovery request is enabled for use in response to the resource being configured by the radio resource control signaling.

5 . The method of claim 3 , wherein the resource configured for the beam recovery request is enabled for use in response to the resource being activated by a medium access control control element.

6 . The method of claim 1 , further comprising selecting a first available resource to transmit the beam recovery request in response to a contention-free resource and a physical uplink control channel resource being available for transmission of the beam recovery request.

7 . The method of claim 1 , further comprising selecting a physical uplink control channel resource to transmit the beam recovery request in response to a contention-free resource and the physical uplink control channel resource being available for transmission of the beam recovery request and in response to the physical uplink control channel resource having a channel quality greater than a predetermined threshold.

8 . The method of claim 7 , further comprising selecting a physical random access channel resource to transmit the beam recovery request in response to the physical uplink control channel resource having the channel quality less than the predetermined threshold.

9 . The method of claim 1 , further comprising monitoring for a response to transmission of the beam recovery request for a predetermined time in response to transmitting the beam recovery request using a physical random access channel resource and skipping a physical uplink control channel resource for the beam recovery request during the predetermined time.

10 . The method of claim 1 , further comprising skipping a physical random access channel resource for the beam recovery request in response to transmitting the beam recovery request using a physical uplink control channel resource.

11 . The method of claim 1 , further comprising selecting a contention based resource to transmit the beam recovery request in response to a contention-free resource and a physical uplink control channel resource being unavailable for transmission of the beam recovery request.

12 . The method of claim 1 , further comprising selecting the resource to transmit the beam recovery request based on a measurement result and an association between a downlink transmission beam and a physical uplink control channel resource.

13 . The method of claim 12 , wherein the association between the downlink transmission beam and the physical uplink control channel resource is configured by radio resource control signaling.

14 . The method of claim 12 , wherein the measurement result is based on a channel state information reference signal in response to the channel state information reference signal being configured by a base unit.

15 . The method of claim 12 , wherein the measurement result is based on a synchronization signal block in response to a channel state information reference signal not being configured by a base unit.

16 . The method of claim 12 , further comprising performing a beam measurement to determine the measurement result in response to a second trigger condition.

17 . The method of claim 16 , wherein the second trigger condition comprises a quality of a serving beam being less than a predetermined threshold, a number of out-of-sync indications from a physical layer, or some combination thereof.

18 . The method of claim 1 , further comprising starting a timer in response to the first trigger condition.

19 . An apparatus comprising:
a receiver that receives information indicating a resource configured for a beam recovery request; and a transmitter that transmits the beam recovery request on the resource in response to a first trigger condition.

20 . An apparatus comprising:
a transmitter that transmits information indicating a resource configured for a beam recovery request; and a receiver that receives the beam recovery request on the resource.

Assignees

• Motorola Mobility Llc

Inventors

• Wu Lianhai
• Zhu Chenxi
• Sun Zhennian
• Wang Haiming
• Yu Xiaodong

Classifications

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04W74/0838

  using contention-free random access [CFRA] · CPC title

• H04W74/0833

  Random access procedures, e.g. with 4-step access · CPC title

• H04B7/0623

  Auxiliary parameters, e.g. power control [PCB] or not acknowledged commands [NACK], used as feedback information · CPC title

• H04B7/0632

  Channel quality parameters, e.g. channel quality indicator [CQI] · CPC title