# US 12,010,521 B2 · Signal transfer system, signal transfer method, and path control device

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- Number: US 12,010,521 B2
- Document ID: US12010521B2
- Status: Granted
- Kind: B2
- Application number: 17/602,893
- Filed: 2020-03-26
- Published: 2022-06-23
- Granted: 2024-06-11
- Earliest claimed: 2019-04-12
- Assignees: Nippon Telegraph and Telephone Corporation
- Applicants: Nippon Telegraph and Telephone Corporation
- Inventors: Naotaka Shibata; Keita Takahashi; Tatsuya Fukui; Hideaki Kimura; Hirofumi Yamamoto; Noriyuki Ota; Jun Terada
- Web page: https://patentgrep.com/patent/US12010521B2

## CPC

- H04W 16/04: Traffic adaptive resource partitioning
- H04W 28/10: Flow control {between communication endpoints}
- H04W 40/02: Communication route or path selection, e.g. power-based or shortest path routing
- H04W 88/10: adapted for operation in multiple networks, e.g. multi-mode access points
- H04W 92/22: between access point controllers
- H04W 92/24: between backbone network devices
- H04W 88/14: Backbone network devices
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

Signal transfer devices that relay base stations of service providers that perform communication with radio terminals and an aggregation station that controls the base stations, and a route control device that controls signal distribution to user network interfaces (UNIs) and network network interfaces (NNIs) of each of the signal transfer devices, are included. The route control device includes an allocation information acquisition unit that acquires allocation information of frequency to each of the base stations; a band adjustment unit that adjusts an MBH band for each of the UNIs, on the basis of correspondence relation information representing a correspondence relation between the UNIs and the service providers, band information indicating a maximum MBH band of each of the UNIs, and the allocation information; and a distribution determination unit that determines signal distribution to each of the NNIs, on the basis of the MBH band adjusted by the band adjustment unit and configuration information representing a connection configuration of each of the signal transfer devices. The signal transfer device transmits a signal from each of the NNIs on the basis of the signal distribution to each of the NNIs determined by the distribution determination unit.

## Claims

### Claim 1

A signal transfer system comprising:
a plurality of signal transfer devices that relay a plurality of base stations of a plurality of service providers that perform communication with radio terminals and an aggregation station that controls the plurality of the base stations; and
a route control device that controls signal distribution to a plurality of user network interfaces (UNIs) and a plurality of network network interfaces (NNIs) of each of the plurality of the signal transfer devices,
wherein the route control device includes:
a processor; and
a storage medium having computer program instructions stored thereon, when executed by the processor, perform to:
acquires allocation information of frequency to each of the base stations;
adjusts an MBH band for each of the plurality of the UNIs, on a basis of correspondence relation information representing a correspondence relation between the UNIs and the plurality of the service providers, band information indicating a maximum MBH band of each of the UNIs, and the allocation information; and
determines signal distribution to each of the plurality of the NNIs, on a basis of the adjusted MBH band and configuration information representing a connection configuration of each of the signal transfer devices,
wherein each of the signal transfer devices transmits a signal from each of the NNIs on a basis of the signal distribution to each of the determined NNIs.

### Claim 2 (depends on 1)

The signal transfer system according to claim 1, wherein the computer program instructions further perform to collects traffic information representing traffic of each of the plurality of the base stations; and outputs allocation change request information representing an allocation change request of frequency to each of the base stations, on a basis of the traffic information, wherein the allocation information changed on a basis of the allocation change request information.

### Claim 3

A signal transfer method using a plurality of UNIs and a plurality of NNIs of each of a plurality of signal transfer devices that relay a plurality of base stations of a plurality of service providers that perform communication with radio terminals and an aggregation station that controls the plurality of the base stations, the method comprising:
an allocation information acquisition step of acquiring allocation information of frequency to each of the base stations;
a band adjustment step of adjusting an MBH band for each of the plurality of the UNIs, on a basis of correspondence relation information representing a correspondence relation between the UNIs and the plurality of the service providers, band information representing a maximum MBH band of each of the UNIs, and the allocation information; and
a distribution determination step of determining signal distribution to each of the NNIs, on a basis of the adjusted MBH band and configuration information representing a connection configuration of each of the signal transfer devices.

### Claim 4 (depends on 3)

The signal transfer method according to claim 3, further comprising: a traffic collection step of collecting traffic information representing traffic of each of the plurality of the base stations; and a change request step of outputting allocation change request information representing an allocation change request of frequency to each of the plurality of the base stations, on a basis of the traffic information, wherein the allocation information acquisition step includes acquiring the allocation information changed on a basis of the allocation change request information.

### Claim 5

A route control device that controls signal distribution to a plurality of UNIs and a plurality of NNIs of each of a plurality of signal transfer devices that relay a plurality of base stations of a plurality of service providers that perform communication with radio terminals and an aggregation station that controls the plurality of the base stations, the device comprising:
a processor;
and a storage medium having computer program instructions stored thereon, when executed by the processor, perform to:
acquires allocation information of frequency to each of the plurality of the base stations;
adjusts an MBH band for each of the plurality of the UNIs, on a basis of correspondence relation information representing a correspondence relation between the UNIs and the plurality of the service providers, band information indicating a maximum MBH band of each of the UNIs, and the allocation information; and
determines signal distribution to each of the plurality of the NNIs, on a basis of the adjusted MBH band and configuration information representing a connection configuration of each of the plurality of the signal transfer devices.

### Claim 6 (depends on 5)

The route control device according to claim 5, wherein the computer program instructions further perform to collects traffic information representing traffic of each of the plurality of the base stations; and outputs allocation change request information representing an allocation change request of frequency to each of the plurality of the base stations, on a basis of the traffic information, wherein acquires the allocation information changed on a basis of the allocation change request information.