Techniques to provide energy efficient radio resource management

Patent metadata

Field	Value
Publication number	US-2018302819-A1
Application number	US-201815954569-A
Country	US
Kind code	A1
Filing date	Apr 16, 2018
Priority date	Apr 18, 2017
Publication date	Oct 18, 2018
Grant date	—

Abstract

A method of wireless communications at a user equipment (UE) includes receiving, from a serving cell associated with a wireless network, a radio resource management (RRM) mode indicator that indicates a set of one or more beams for which cell measurement and reporting is to be performed by the UE; performing at least one cell measurement on at least one synchronization signal (SS) block received from at least one neighboring cell; determining, based at least in part on the RRM mode indicator, whether to decode a physical broadcast channel (PBCH) received in each SS block of the at least one SS block; and transmitting a cell measurement report, the cell measurement report based at least in part on the at least one cell measurement, the cell measurement report selectively including at least one beam index based at least in part on whether the PBCH is decoded.

First claim

What is claimed is:

1 . A method of wireless communications at a user equipment (UE), comprising:
receiving at the UE, from a serving cell associated with a wireless network, a radio resource management (RRM) mode indicator that indicates a set of one or more beams for which cell measurement and reporting is to be performed by the UE; performing at least one cell measurement on at least one synchronization signal (SS) block received from at least one neighboring cell; determining, based at least in part on the RRM mode indicator, whether to decode a physical broadcast channel (PBCH) received in each SS block of the at least one SS block; and transmitting a cell measurement report, the cell measurement report based at least in part on the at least one cell measurement, and the cell measurement report selectively including at least one beam index based at least in part on whether the PBCH is decoded.

2 . The method of claim 1 , further comprising:
receiving at the UE, from the serving cell, an indicator of a measurement window smaller than an SS burst set periodicity of the serving cell and the at least one neighboring cell; and performing the at least one cell measurement on the at least one SS block received from the at least one neighboring cell, and at least one measurement on at least one SS block received from the serving cell, during the measurement window.

3 . The method of claim 1 , further comprising:
determining an indicator of a measurement window is not received from the serving cell; performing, based at least in part on the determination that the indicator of the measurement window is not received, the at least one cell measurement on the at least one SS block during a measurement gap; and performing, based at least in part on the determination that the indicator of the measurement window is not received, and during a measurement window larger than an SS burst set periodicity of the serving cell and the at least one neighboring cell, at least one measurement on at least one SS block received from the serving cell.

4 . The method of claim 3 , wherein the at least one cell measurement comprises at least one intra-frequency measurement on the at least one SS block.

5 . The method of claim 1 , further comprising:
determining the serving cell and a neighboring cell have a synchronized SS burst set periodicity and SS burst set transmission; and determining, based at least in part on the determination that the serving cell and the neighboring cell have the synchronized SS burst set periodicity and SS burst set transmission, and based at least in part on a first timing or a first beam index of each SS block received from the serving cell, at least one of a second timing or a second beam index of each SS block in the at least one SS block received form the neighboring cell.

6 . The method of claim 1 , wherein the set of one or more beams indicated by the RRM mode indicator comprises a single beam, the method further comprising:
monitoring the single beam for the at least one SS block; determining, based at least in part on the RRM mode indicator, to refrain from decoding the PBCH received in each SS block of the at least one SS block; and formatting the cell measurement report, based at least in part on the RRM mode indicator, to include an association of a cell identity (cell ID) of a neighboring cell and one or more of the at least one cell measurement.

7 . The method of claim 1 , wherein the set of one or more beams indicated by the RRM mode indicator comprises a plurality of beams, the method further comprising:
monitoring the plurality of beams for the at least one SS block.

8 . The method of claim 7 , further comprising:
determining a maximum value of the at least one cell measurement; determining, based at least in part on the RRM mode indicator, to refrain from decoding the PBCH received in each SS block of the at least one SS block; and formatting the cell measurement report, based at least in part on the RRM mode indicator, to include an association of a cell identity (cell ID) of a neighboring cell and the maximum value of the at least one cell measurement.

9 . The method of claim 7 , further comprising:
determining a maximum value of the at least one cell measurement; determining, based at least in part on the RRM mode indicator, to decode a first PBCH received in a first SS block associated with the maximum value of the at least one cell measurement; and formatting the cell measurement report, based at least in part on the RRM mode indicator, to include an association of a cell identity (cell ID) of a neighboring cell, a beam index obtained from the decoded first PBCH, and the maximum value of the at least one cell measurement.

10 . The method of claim 7 , further comprising:
determining a maximum value of the at least one cell measurement; determining that the maximum value satisfies a threshold; determining, based at least in part on the RRM mode indicator and the determination that the maximum value satisfies the threshold, to decode a first PBCH received in a first SS block associated with the maximum value of the at least one cell measurement; and formatting the cell measurement report, based at least in part on the RRM mode indicator and the determination that the maximum value satisfies the threshold, to include an association of a cell identity (cell ID) of a neighboring cell, a beam index obtained from the decoded first PBCH, and the maximum value of the at least one cell measurement.

11 . The method of claim 10 further comprising:
receiving the threshold from the serving cell.

12 . The method of claim 7 , further comprising:
determining a maximum value of the at least one cell measurement; determining that the maximum value fails to satisfy a threshold; determining, based at least in part on the RRM mode indicator and the determination that the maximum value fails to satisfy the threshold, to refrain from decoding the PBCH received in each SS block of the at least one SS block; and formatting the cell measurement report, based at least in part on the RRM mode indicator and the determination that the maximum value fails to satisfy the threshold, to include an association of a cell identity (cell ID) of a neighboring cell and the maximum value of the at least one cell measurement.

13 . The method of claim 7 , further comprising:
determining a maximum value of the at least one cell measurement per beam, for a set of one or more beams; identifying one or more of the maximum values that satisfies a threshold; determining, based at least in part on the RRM mode indicator and the identified one or more of the maximum values that satisfy the threshold, to decode a set of one or more PBCHs received in a set of one or more SS blocks associated with the identified one or more of the maximum values; and formatting the cell measurement report, based at least in part on the RRM mode indicator and the identified one or more of the maximum values that satisfies the threshold, to include, per beam associated with the identified one or more of the maximum values, an association of a cell identity (cell ID) of a neighboring cell, a beam index obtained from a decoded PBCH, and a corresponding maximum value of the identified one or more of the maximum values.

14 . The method of claim 7 , further comprising:
determining a maximum value of the at least one cell measurement per beam, for a set of one or more beams; determining that each of the maximum values fail to satisfy a threshold; determining, based at least in part on the RRM mode indicator and

Assignees

• Qualcomm Inc

Inventors

• Lee Heechoon
• Ly Hung
• Ji Tingfang
• Sun Haitong

Classifications

• H04W84/045

  using private Base Stations, e.g. femto Base Stations, home Node B · CPC title

• H04W24/10 Primary

  Scheduling measurement reports {; Arrangements for measurement reports} · CPC title

• H04B7/0617 Primary

  for beam forming · CPC title

• H04B7/0626

  Channel coefficients, e.g. channel state information [CSI] · CPC title

• H04B7/0632

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