# US 2022/0286185 A1 · Method and Apparatus for Interference Avoidance

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- Number: US 2022/0286185 A1
- Document ID: US20220286185A1
- Status: Published application
- Kind: A1
- Application number: 17/637,956
- Filed: 2019-09-11
- Published: 2022-09-08
- Earliest claimed: 2019-09-11
- Assignees: Telefonaktiebolaget LM Ericsson (publ)
- Applicants: Telefonaktiebolaget LM Ericsson (PUBL)
- Inventors: Qi Zhang; Chunhui Liu; Wei Zhou
- Web page: https://patentgrep.com/patent/US20220286185A1

## CPC

- H04B 7/06952: {Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping}
- H04B 7/088: {using beam selection}
- H04B 17/336: Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
- H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports}
- H04W 72/541: using the level of interference
- H04W 16/28: using beam steering
- H04W 72/046: {the resource being in the space domain, e.g. beams}
- H04B: TRANSMISSION
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

Various embodiments of the present disclosure provide a method for interference avoidance. The method which may be performed by a network node comprises selecting a serving beam for a terminal device from candidate beams reported to the network node by the terminal device, based at least in part on inter-cell interference information of the candidate beams. The method may further comprise informing the terminal device of the selected serving beam.

## Claims

### Claim 1

A method performed by a network node, comprising:
selecting a serving beam for a terminal device from candidate beams reported to the network node by the terminal device, based at least in part on inter-cell interference information of the candidate beams; and
informing the terminal device of the selected serving beam.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the inter-cell interference information of the candidate beams indicates at least one of:
a number of inter-cell interferers per candidate beam; and
interference level of the inter-cell interferers per candidate beam.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the candidate beams are reported to the network node by serving cell measurement information of the terminal device, and wherein the serving cell measurement information comprises information indicating that the terminal device is potentially subject to inter-cell beam interference.

### Claim 4 (depends on 3)

The method according to claim 3, wherein the serving cell measurement information of the terminal device indicates at least one of:
serving cell signal quality of the terminal device being lower than a first quality threshold; and
at least one of the candidate beams meeting a first criterion.

### Claim 5 (depends on 1)

The method according to claim 1, wherein the inter-cell interference information of the candidate beams is based on at least one of:
predetermined beam configuration information; and
an evaluation of inter-cell beam interference for the network node.

### Claim 6 (depends on 5)

The method according to claim 5, wherein the evaluation of the inter-cell beam interference for the network node comprises:
performing measurement configuration for one or more reference devices which are potentially subject to inter-cell beam interference, wherein the measurement configuration instructs the one or more reference devices to report neighboring cell measurement information to the network node in response to a trigger event;
receiving the neighboring cell measurement information reported by the one or more reference devices in response to the trigger event, wherein the neighboring cell measurement information indicates potential inter-cell interferers of beams reported to the network node by serving cell measurement information of the one or more reference devices; and
evaluating the inter-cell beam interference, based at least in part on the neighboring cell measurement information reported by the one or more reference devices.

### Claim 7 (depends on 6)

The method according to claim 6, wherein the serving cell measurement information of the one or more reference devices indicates at least one of:
serving cell signal quality of at least one of the one or more reference devices being lower than a second quality threshold; and
at least one of the beams reported by the one or more reference devices meeting a second criterion.

### Claim 8 (depends on 6)

The method according to claim 6, wherein the trigger event for a reference device comprises that neighboring cell signal quality of the reference device is higher than a third quality threshold.

### Claim 9 (depends on 6)

The method according to claim 6, wherein the one or more reference devices comprise the terminal device.

### Claim 10 (depends on 5)

The method according to claim 5, wherein the evaluation of the inter-cell beam interference for the network node is updated according to a specific rule.

### Claim 11 (depends on 1)

The method according to claim 1, wherein the candidate beams are pre-defined at the network node.

### Claim 12

A method performed by a terminal device, comprising:
receiving, from a network node, information about a serving beam selected from candidate beams reported to the network node by the terminal device, wherein the selection of the serving beam is based at least in part on inter-cell interference information of the candidate beams.

### Claim 13 (depends on 12)

The method according to claim 12, wherein the inter-cell interference information of the candidate beams indicates at least one of:
a number of inter-cell interferers per candidate beam; and
interference level of the inter-cell interferers per candidate beam.

### Claim 14 (depends on 12)

The method according to claim 12, wherein the candidate beams are reported to the network node by serving cell measurement information of the terminal device, and wherein the serving cell measurement information comprises information indicating that the terminal device is potentially subject to inter-cell beam interference.

### Claim 15 (depends on 14)

The method according to claim 14, wherein the serving cell measurement information of the terminal device indicates at least one of:
serving cell signal quality of the terminal device being lower than a first quality threshold; and
at least one of the candidate beams meeting a first criterion.

### Claim 16 (depends on 12)

The method according to claim 12, wherein the inter-cell interference information of the candidate beams is based on at least one of:
predetermined beam configuration information; and
an evaluation of inter-cell beam interference for the network node.

### Claim 17 (depends on 16)

The method according to claim 16, further comprising:
receiving measurement configuration information for the terminal device from the network node, in response to the evaluation of the inter-cell beam interference for the network node, wherein the measurement configuration information instructs the terminal device to report neighboring cell measurement information to the network node in response to a trigger event.

### Claim 18 (depends on 17)

The method according to claim 17, further comprising:
performing neighboring cell measurement according to the measurement configuration information for the terminal device; and
transmitting the neighboring cell measurement information of the terminal device to the network node, in response to the trigger event, wherein the neighboring cell measurement information indicates potential inter-cell interferers of the candidate beams reported to the network node by serving cell measurement information of the terminal device.

### Claim 19

The method according to 18, wherein the serving cell measurement information of the terminal device indicates at least one of:
serving cell signal quality of the terminal device being lower than a second quality threshold; and
at least one of the candidate beams reported by the terminal device meeting a second criterion.

### Claim at position 20

-21. (canceled)

### Claim 22

A network node, comprising:
one or more processors; and
one or more memories storing computer program codes,
the one or more memories and the computer program codes configured to, with the one or more processors, cause the network node at least to:
select a serving beam for a terminal device from candidate beams reported to the network node by the terminal device, based at least in part on inter-cell interference information of the candidate beams; and
inform the terminal device of the selected serving beam.

### Claim at position 22

-27. (canceled)