# US 10,122,509 B2 · Reference signal enhancement for shared cell

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- Number: US 10,122,509 B2
- Document ID: US10122509B2
- Status: Granted
- Kind: B2
- Application number: 15/392,826
- Filed: 2016-12-28
- Published: 2017-04-20
- Granted: 2018-11-06
- Earliest claimed: 2014-03-20
- Assignees: Intel IP Corporation
- Applicants: Intel IP Corporation
- Inventors: Seunghee Han; Dae Jung Yoon; Yang Tang
- Web page: https://patentgrep.com/patent/US10122509B2

## CPC

- H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)}
- H04L 5/0035: {Resource allocation in a cooperative multipoint environment}
- H04L 5/0073: {Allocation arrangements that take into account other cell interferences}
- H04L 5/0023: {Time-frequency-space}
- H04L 5/0082: {at predetermined intervals}
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

In embodiments, apparatuses, methods, and storage media may be described for distinguishing, by a user equipment (UE), a reference signal (RS) transmitted by a cell that may have a same identifier (ID) as another cell in a network. In embodiments, a muting pattern, a time offset, or a virtual cell identifier (VCID) may be used to generate an RS sequence or RS resource allocation.

## Claims

### Claim 1

A user equipment (UE) comprising:
receive circuitry to receive a discovery reference signal (DRS), wherein the DRS is a DRS transmitted by a first transmit station in a first cell, wherein the first transmit station has a same physical cell identifier (PCID) as a second transmit station in a second cell;
reference signal (RS) circuitry coupled with the receive circuitry, the RS circuitry to:
identify configuration information having a configuration index and a time-domain offset parameter associated with the DRS; and
perform, based on the time-domain offset parameter, a measurement related to the DRS; and
transmit circuitry coupled with the RS circuitry, the transmit circuitry to transmit, to an evolved NodeB (eNB), the measurement and the configuration index,
wherein the time-domain offset parameter is related to a subframe offset.

### Claim 2 (depends on 1)

The UE of claim 1, wherein the DRS is a channel state information (CSI) RS (CSI-RS).

### Claim 3

One or more non-transitory computer-readable media comprising instructions to cause a user equipment (UE) in a cellular network, upon execution of the instructions by one or more processors of the UE, to:
identify a received discovery reference signal (DRS), wherein the DRS is a DRS transmitted by a first transmit station in a first cell, wherein the first transmit station has a same physical cell identifier (PCID) as a second transmit station in a second cell;
identify configuration information having a configuration index and a time-domain offset parameter associated with the DRS;
perform, based on the time-domain offset parameter, a measurement related to the DRS; and
transmit, to an evolved NodeB (eNB), the measurement and the configuration index,
wherein the time-domain offset parameter indicates a subframe offset.

### Claim 4 (depends on 3)

The one or more non-transitory computer-readable media of claim 3, wherein the DRS is a channel state information (CSI) RS (CSI-RS).

### Claim 5 (depends on 3)

The one or more non-transitory computer-readable media of claim 3, wherein the cellular network is a coordinated multi point (CoMP) cellular network.

### Claim 6

A user equipment (UE) comprising:
one or more processors; and
one or more non-transitory computer-readable media comprising instructions that, when executed by the one or more processors, cause the UE to:
identify configuration information having a configuration index and an offset parameter, wherein the offset parameter indicates a subframe offset;
identify a received discovery reference signal (DRS), wherein the DRS is a DRS transmitted by a first transmit station in a first cell, wherein the first transmit station has a same physical cell identifier (PCID) as a second transmit station in a second cell;
perform, based on the offset parameter, a measurement related to the DRS; and
transmit, to an evolved NodeB (eNB), the measurement and the configuration index.

### Claim 7 (depends on 6)

The UE of claim 6, wherein the DRS is a channel state information (CSI) RS (CSI-RS).

### Claim 8 (depends on 6)

The UE of claim 6, wherein the UE is in a coordinated multi point (CoMP) cellular network.

### Claim 9

A method comprising:
identifying, by a user equipment (UE), configuration information having a configuration index and a time-domain offset parameter;
identifying, by the user equipment (UE), a received discovery reference signal (DRS), wherein the DRS is a DRS transmitted by a first transmit station in a first cell, wherein the first transmit station has a same physical cell identifier (PCID) as a second transmit station in a second cell;
performing, by the UE based on the time-domain offset parameter, a measurement related to the DRS; and
transmitting, by the UE, to an evolved NodeB (eNB), the measurement and the configuration index,
wherein the time-domain offset parameter is related to a subframe offset.

### Claim 10 (depends on 9)

The method of claim 9, wherein the DRS is a channel state information (CSI) RS (CSI-RS).

### Claim 11 (depends on 9)

The method of claim 9, wherein the UE is in a coordinated multi point (CoMP) cellular network.