# US 2019/0320360 A1 · Reference point determination

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- Number: US 2019/0320360 A1
- Document ID: US20190320360A1
- Status: Published application
- Kind: A1
- Application number: 16/381,832
- Filed: 2019-04-11
- Published: 2019-10-17
- Earliest claimed: 2018-04-13
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Heechoon LEE; Peter GAAL; Wanshi CHEN; Tao LUO; Hung Dinh LY; Alexandros MANOLAKOS
- Web page: https://patentgrep.com/patent/US20190320360A1

## CPC

- H04L 5/0094: {Indication of how sub-channels of the path are allocated}
- H04W 40/244: {using a network of reference devices, e.g. beaconing}
- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04W 48/12: using downlink control channel
- H04W 48/16: Discovering, processing access restriction or access information
- H04W 56/001: {Synchronization between nodes}
- H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04W 88/02: Terminal devices
- H04W 36/0085: {Hand-off measurements}
- H04W 36/087: {between radio units of access points}
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may receive, from a base station and based at least in part on a triggering event, an indication of a frequency domain indexing configuration for a relative reference point. The user equipment may use at least one of a start of a control resource set or an absolute reference point for the relative reference point based at least in part on the indication of the frequency domain indexing configuration. Numerous other aspects are provided.

## Claims

### Claim 1

A method of wireless communication performed by a user equipment (UE), comprising:
receiving, from a base station and based at least in part on a triggering event, an indication of a frequency domain indexing configuration for a relative reference point;
using at least one of a start of a control resource set or an absolute reference point for the relative reference point based at least in part on the indication of the frequency domain indexing configuration; and
communicating using a physical channel or signal determined based at least in part on the relative reference point.

### Claim 2 (depends on 1)

The method of claim 1, wherein the physical channel is at least one of:
a physical broadcast channel (PBCH),
a physical downlink control channel (PDCCH),
a physical downlink shared channel (PDSCH),
a physical uplink control channel (PUCCH),
a physical uplink shared channel (PUSCH),
a sounding reference signal (SRS), or
a channel state information reference signal (CSI-RS).

### Claim 3 (depends on 1)

The method of claim 1, wherein the relative reference point is physical resource block 0 of an initial downlink bandwidth part for the control resource set, and
wherein the control resource set is configured by a physical channel.

### Claim 4 (depends on 1)

The method of claim 1, wherein the control resource set is control resource set 0 and the relative reference point is the start of the control resource set.

### Claim 5 (depends on 1)

The method of claim 1, wherein the control resource set is not control resource set 0 and the relative reference point is the absolute reference point.

### Claim 6 (depends on 1)

The method of claim 1, wherein the relative reference point is determined based at least in part on whether a configured bandwidth part or the control resource set is associated with an initial access procedure.

### Claim 7 (depends on 1)

The method of claim 1, wherein the triggering event includes at least one of a handover, a secondary cell configuration, a primary secondary cell configuration, or a bandwidth part configuration.

### Claim 8 (depends on 1)

The method of claim 1, wherein the relative reference point is determined based at least in part on a component carrier not being associated with a synchronization sequence or physical broadcast channel (SS/PBCH) block.

### Claim 9 (depends on 1)

The method of claim 1, wherein the absolute reference point of a serving cell defines, for an intra-frequency radio resource management measurement, a channel state information reference signal sequence.

### Claim 10 (depends on 1)

The method of claim 1, wherein, for an inter-frequency radio resource management measurement, the absolute reference point is defined on a per frequency layer basis or a per frequency band basis.

### Claim 11 (depends on 1)

The method of claim 1, wherein, for an inter-frequency radio resource management measurement, the absolute reference point is defined based at least in part on a serving cell of the UE or a neighbor cell of the UE.

### Claim 12 (depends on 1)

The method of claim 1, wherein the absolute reference point is defined based at least in part on a radio resource control configuration message and using an absolute channel number.

### Claim 13 (depends on 1)

The method of claim 1, wherein the absolute reference point is defined based at least in part on a per frequency layer basis and using an absolute channel number.

### Claim 14 (depends on 1)

The method of claim 1, wherein the absolute reference point is defined based at least in part on a radio resource control configuration message and relative to a synchronization sequence or physical broadcast channel (SS/PBCH) block frequency.

### Claim 15 (depends on 1)

The method of claim 1, wherein the absolute reference point is defined based at least in part on a candidate the absolute reference point of a set of candidate absolute reference point's.

### Claim 16

A user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors operatively coupled to the memory, the memory and the one or more processors configured to:
receive, from a base station and based at least in part on a triggering event, an indication of a frequency domain indexing configuration for a relative reference point;
use at least one of a start of a control resource set or an absolute reference point for the relative reference point based at least in part on the indication of the frequency domain indexing configuration; and
communicate using a physical channel or signal determined based at least in part on the relative reference point.

### Claim 17 (depends on 16)

The UE of claim 16, wherein the physical channel is at least one of:
a physical broadcast channel (PBCH),
a physical downlink control channel (PDCCH),
a physical downlink shared channel (PDSCH),
a physical uplink control channel (PUCCH),
a physical uplink shared channel (PUSCH),
a sounding reference signal (SRS), or
a channel state information reference signal (CSI-RS).

### Claim 18 (depends on 16)

The UE of claim 16, wherein the absolute reference point is physical resource block 0 of an initial downlink bandwidth part for the control resource set, and
wherein the control resource set is configured by a physical channel.

### Claim 19 (depends on 16)

The UE of claim 16, wherein the control resource set is control resource set 0 and the relative reference point is the start of the control resource set.

### Claim 20 (depends on 16)

The UE of claim 16, wherein the control resource set is not control resource set 0 and the relative reference point is the absolute reference point.

### Claim 21 (depends on 16)

The UE of claim 16, wherein the relative reference point is determined based at least in part on whether a configured bandwidth part or the control resource set is associated with an initial access procedure.

### Claim 22 (depends on 16)

The UE of claim 16, wherein the triggering event includes at least one of a handover, a secondary cell configuration, a primary secondary cell configuration, or a bandwidth part configuration.

### Claim 23

A non-transitory computer-readable medium storing one or more instructions for wireless communication, the one or more instructions comprising:
one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the one or more processors to:
receive, from a base station and based at least in part on a triggering event, an indication of a frequency domain indexing configuration for a relative reference point;
use at least one of a start of a control resource set or an absolute reference point for the relative reference point based at least in part on the indication of the frequency domain indexing configuration; and
communicate using a physical channel or signal determined based at least in part on the relative reference point.

### Claim 24 (depends on 23)

The non-transitory computer-readable medium of claim 23, wherein the physical channel is at least one of:
a physical broadcast channel (PBCH),
a physical downlink control channel (PDCCH),
a physical downlink shared channel (PDSCH),
a physical uplink control channel (PUCCH),
a physical uplink shared channel (PUSCH),
a sounding reference signal (SRS), or
a channel state information reference signal (CSI-RS).

### Claim 25 (depends on 23)

The non-transitory computer-readable medium of claim 23, wherein the absolute reference point is physical resource block 0 of an initial downlink bandwidth part for the control resource set, and
wherein the control resource set is configured by a physical channel.

### Claim 26 (depends on 23)

The non-transitory computer-readable medium of claim 23, wherein the control resource set is control resource set 0 and the relative reference point is the start of the control resource set.

### Claim 27

An apparatus for wireless communication, comprising:
means for receiving, from a base station and based at least in part on a triggering event, an indication of a frequency domain indexing configuration for a relative reference point;
means for using at least one of a start of a control resource set or an absolute reference point for the relative reference point based at least in part on the indication of the frequency domain indexing configuration; and
means for communicating using a physical channel or signal determined based at least in part on the relative reference point.

### Claim 28 (depends on 27)

The apparatus of claim 27, wherein the physical channel is at least one of:
a physical broadcast channel (PBCH),
a physical downlink control channel (PDCCH),
a physical downlink shared channel (PDSCH),
a physical uplink control channel (PUCCH),
a physical uplink shared channel (PUSCH),
a sounding reference signal (SRS), or
a channel state information reference signal (CSI-RS).

### Claim 29 (depends on 27)

The apparatus of claim 27, wherein the absolute reference point is physical resource block 0 of an initial downlink bandwidth part for the control resource set, and
wherein the control resource set is configured by a physical channel.

### Claim 30 (depends on 27)

The apparatus of claim 27, wherein the control resource set is control resource set 0 and the relative reference point is the start of the control resource set.