# US 11,115,843 B2 · Method and device for managing multiple remote radio heads in communication network

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- Number: US 11,115,843 B2
- Document ID: US11115843B2
- Status: Granted
- Kind: B2
- Application number: 16/858,991
- Filed: 2020-04-27
- Published: 2020-12-03
- Granted: 2021-09-07
- Earliest claimed: 2019-05-31
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Anton Komlev; Maksymilian Augustyn; Sungbum Park
- Web page: https://patentgrep.com/patent/US11115843B2

## CPC

- H04W 24/04: Arrangements for maintaining operational condition
- H04L 41/0609: {based on severity or priority}
- H04L 41/064: {involving time analysis}
- H04L 41/069: using logs of notifications; Post-processing of notifications
- H04W 88/085: {Access point devices with remote components}
- Y02D 30/70: in wireless communication networks
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

Disclosed is a method for managing multiple remote radio heads (RRHs) in a communication network, including, in response to an occurrence of an alarm indicating that a value of an operation parameter of an RRH among the multiple RRHs is beyond a predetermined range, determining whether the RRH is faulty by using a model for detecting a fault in the RRH, based on one or more pieces of operation information of the RRH which respectively correspond to multiple timestamps, and issuing a notification indicating that the RRH is faulty when it is determined that the RRH is faulty.

## Claims

### Claim 1

A method for managing multiple remote radio heads (RRHs) in a communication network, the method comprising:
in response to an occurrence of an alarm indicating that a value of an operation parameter of an RRH among the multiple RRHs is beyond a predetermined range, determining whether the RRH is faulty by using a model for detecting a fault in the RRH, based on one or more pieces of operation information of the RRH which respectively correspond to multiple timestamps; and
issuing a notification indicating that the RRH is faulty when it is determined that the RRH is faulty,
wherein the one or more pieces of operation information of the RRH comprises at least one of information related to an uptime of the RRH, information related to a type of the alarm, information related to a state of the RRH, and information related to an environment of the RRH.

### Claim 2 (depends on 1)

The method of claim 1, further comprising:
acquiring a log of at least one RRH among the multiple RRHs;
acquiring at least one piece of the operation information of the at least one RRH corresponding to at least one timestamp from the log of the at least one RRH; and
storing, in a database, the at least one timestamp and the acquired operation information of the at least one RRH.

### Claim 3 (depends on 2)

The method of claim 2, further comprising asynchronously reading alarms from an element management system (EMS) and a notification log comprising a list of RRHs corresponding to the alarms,
wherein the log of the at least one RRH is acquired on the basis of the notification log.

### Claim 4 (depends on 2)

The method of claim 2,
wherein the log of the at least one RRH of the multiple RRHs is acquired from an EMS or a base station in real time.

### Claim 5 (depends on 2)

The method of claim 2, wherein the log of the at least one RRH of the multiple RRHs is transmitted from an EMS or a base station in response to the occurrence of the alarm for the at least one RRH.

### Claim 6 (depends on 2)

The method of claim 2, further comprising storing, in the database, a result of the determining of whether the RRH is faulty.

### Claim 7 (depends on 1)

The method of claim 1,
wherein an input of the model for detecting the fault in the RRH is an n×k input matrix, and an output of the model for detecting the fault in the RRH is a value indicating whether the RRH is faulty, and
wherein n is a number of the one or more pieces of operation information of the RRH, and k is a number of the multiple timestamps.

### Claim 8 (depends on 1)

The method of claim 1,
wherein the information related to the state of the RRH comprises at least one of information on a frequency used by the RRH, information on a transmission power, and information on a firmware version.

### Claim 9 (depends on 1)

The method of claim 1,
wherein the information related to the environment of an RRH among the RRHs comprises information related to at least one of temperature, power, and voltage.

### Claim 10

A device for managing multiple remote radio heads (RRHs) in a communication network, the device comprising:
a communication interface;
a memory; and
a processor connected to the communication interface and the memory, wherein the processor is configured to:
in response to an occurrence of an alarm indicating that a value of an operation parameter of an RRH among the multiple RRHs is beyond a predetermined range, determine whether the RRH is faulty by using a model for detecting a fault in the RRH, based on one or more pieces of operation information of the RRH which respectively correspond to multiple timestamps; and
issue a notification indicating that the RRH is faulty when it is determined that the RRH is faulty,
wherein the one or more pieces of operation information of the RRH comprises at least one of information related to an uptime of the RRH, information related to a type of the alarm, information related to a state of the RRH, and information related to an environment of the RRH.

### Claim 11 (depends on 10)

The device of claim 10, wherein the processor is further configured to:
acquire a log of at least one RRH among the multiple RRHs;
acquire at least one piece of the operation information of the at least one RRH corresponding to at least one timestamp from the log of the at least one RRH; and
store, in a database, the at least one timestamp and the acquired operation information of the at least one RRH.

### Claim 12 (depends on 11)

The device of claim 11,
wherein the processor is further configured to asynchronously read alarms from an element management system (EMS) and a notification log comprising a list of RRHs corresponding to the alarms, and
wherein the log of the at least one RRH is acquired on the basis of the notification log.

### Claim 13 (depends on 11)

The device of claim 11,
wherein the log of the at least one RRH of the multiple RRHs is acquired from an EMS or a base station in real time.

### Claim 14 (depends on 11)

The device of claim 11,
wherein the log of the at least one RRH of the multiple RRHs is transmitted from an EMS or a base station in response to the occurrence of the alarm for the at least one RRH.

### Claim 15 (depends on 11)

The device of claim 11,
wherein the processor is further configured to store, in the database, a result of the determining of whether the RRH is faulty.

### Claim 16 (depends on 10)

The device of claim 10,
wherein an input of the model for detecting the fault in the RRH is an n×k input matrix, and an output of the model for detecting the fault in the RRH is a value indicating whether the RRH is faulty, and
wherein n is a number of the one or more pieces of operation information of the RRH, and k is a number of the multiple timestamps.

### Claim 17 (depends on 10)

The device of claim 10,
wherein the information related to the state of the RRH comprises at least one of information related to a frequency used by the RRH, information related to transmission power, and information related to a firmware version.

### Claim 18 (depends on 10)

The device of claim 10,
wherein the information related to the environment of the RRH comprises information related to at least one of temperature, power, and voltage.