# US 2023/0412299 A1 · Optical path design apparatus, optical path design method and program

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- Number: US 2023/0412299 A1
- Document ID: US20230412299A1
- Status: Published application
- Kind: A1
- Application number: 18/029,726
- Filed: 2020-10-22
- Published: 2023-12-21
- Earliest claimed: 2020-10-22
- Assignees: Nippon Telegraph and Telephone Corporation
- Applicants: Nippon Telegraph and Telephone Corporation
- Inventors: Takafumi Tanaka; Takuya OHARA; Fumikazu INUZUKA; Takuya ODA; Masayuki SHIMODA
- Web page: https://patentgrep.com/patent/US20230412299A1

## CPC

- H04J 14/0267: {Optical signaling or routing}
- H04J 14/0271: {Impairment aware routing}
- H04B 10/27: Arrangements for networking
- H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S)
- H04B: TRANSMISSION

## Abstract

An optical path design device includes a scheduling unit configured to generate, according to demand information, including information on a frequency bandwidth required for communication between a first node device at a start point of an optical path and a second node device at an end point of an optical path, and including information on a future time zone in which the communication will be executed, allocation content including information on a route connecting the first node device and the second node device and information on a center frequency of the frequency allocated to the communication corresponding to the demand information and determine the start time and the end time of the allocation of the allocation content, and a queue for adjusting a timing of allocation of the allocation content in the future time zone based on the start time and the end time of the allocation in a case where the allocation content cannot be allocated to the communication corresponding to the demand information with the current time as the start time of the allocation.

## Claims

### Claim 1

An optical path design device comprising:
a scheduler, including one or more processors, configured to generate, according to demand information, including information on a frequency bandwidth required for communication between a first node device at a start point of an optical path and a second node device at an end point of an optical path, and including information on a future time zone in which the communication will be executed, allocation content including information on a route connecting the first node device and the second node device and information on a center frequency of the frequency allocated to the communication corresponding to the demand information and determine the start time and the end time of the allocation of the allocation content; and
a queue for adjusting a timing of allocation of the allocation content in the future time zone based on the start time and the end time of the allocation in a case where the allocation content cannot be allocated to the communication corresponding to the demand information with the current time as the start time of the allocation.

### Claim 2 (depends on 1)

The optical path design device according to claim 1, wherein the scheduler is configured to preferentially allocate the allocation content to the communication in which the start time of the future time zone included in the demand information is closer to the start time of the allocation of the allocation content.

### Claim 3

An optical path designing method executed by an optical path design device, the method comprising:
generating, according to demand information, including information on a frequency bandwidth required for communication between a first node device at a start point of an optical path and a second node device at an end point of an optical path, and including information on a future time zone in which the communication will be executed, allocation content including information on a route connecting the first node device and the second node device and information on a center frequency of the frequency allocated to the communication corresponding to the demand information and determining the start time and the end time of the allocation of the allocation content; and
adjusting a timing of allocation of the allocation content in the future time zone based on the start time and the end time of the allocation in a case where the allocation content cannot be allocated to the communication corresponding to the demand information with the current time as the start time of the allocation.

### Claim 4 (depends on 3)

The optical path designing method according to claim 3, wherein, the allocation content is preferentially allocated to the communication in which the start time of the future time zone included in the demand information is closer to the start time of the allocation of the allocation content.

### Claim 5

A non-transitory computer readable medium storing a program for causing a computer to perform operations comprising:
generating, according to demand information, including information on a frequency bandwidth required for communication between a first node device at a start point of an optical path and a second node device at an end point of an optical path, and including information on a future time zone in which the communication will be executed, allocation content including information on a route connecting the first node device and the second node device and information on a center frequency of the frequency allocated to the communication corresponding to the demand information and determining the start time and the end time of the allocation of the allocation content; and
adjusting a timing of allocation of the allocation content in the future time zone based on the start time and the end time of the allocation in a case where the allocation content cannot be allocated to the communication corresponding to the demand information with the current time as the start time of the allocation.

### Claim 6 (depends on 5)

The non-transitory computer readable medium according to claim 5, wherein the allocation content is preferentially allocated to the communication in which the start time of the future time zone included in the demand information is closer to the start time of the allocation of the allocation content.