Optical transmission system and wavelength allocation method

Patent metadata

Field	Value
Publication number	US-10686545-B2
Application number	US-201716336020-A
Country	US
Kind code	B2
Filing date	Sep 27, 2017
Priority date	Sep 28, 2016
Publication date	Jun 16, 2020
Grant date	Jun 16, 2020

Abstract

An optical transmission system of an embodiment connects a plurality of wireless communication systems to each other, and includes a wavelength allocation unit that allocates different wavelengths to optical-terminating devices to which the wireless communication systems next to each other are connected, on the basis of the physical arrangement of each of the plurality of wireless communication system.

First claim

The invention claimed is:

1. An optical transmission system which connects a plurality of wireless communication systems to each other, the optical transmission system comprising:
a traffic monitor that monitors traffic of optical-terminating devices connected to respective ones of the plurality of wireless communication systems during a terminal device moving among communicable range of the plurality of wireless communication systems;
a connection order acquisitor that estimates a physical arrangement of the optical-terminating devices on a basis of transition of the traffic of the optical-terminating devices; and
a wavelength allocator that allocates different wavelengths to the optical-terminating devices to which the wireless communication systems next to each other are connected, on a basis of the physical arrangement of the optical-terminating devices.

2. An optical transmission system which connects a plurality of wireless communication systems to each other, the optical transmission system comprising:
a traffic monitor that acquires traffic information relating to traffic of each of the plurality of wireless communication systems;
a connection order acquisitor that estimates a physical arrangement of the optical-terminating devices on a basis of the traffic information;
a connection number information acquisitor that acquires connection number information indicating the number of optical-terminating devices connected to the wireless communication systems;
a wavelength information storage unit that stores wavelength information indicating information of a wavelength allocated to each of the optical-terminating devices which is connected to a respective one of the plurality of wireless communication systems; and
a wavelength allocator that allocates different wavelengths to optical-terminating devices to which the wireless communication systems next to each other are connected, on a basis of the physical arrangement of the optical-terminating devices.

3. The optical transmission system according to claim 2 , further comprising a registration unit that registers arrangement information indicating the physical arrangement of the optical-terminating devices estimated by the connection order acquisitor with an optical terminal station device included in the optical transmission system.

4. The optical transmission system according to claim 2 wherein the connection order acquisitor estimates the physical arrangement of the optical-terminating devices on a basis of a distance between the optical terminal station device and each of the optical-terminating devices.

5. The optical transmission system according to claim 1 , wherein the wavelength allocator estimates one optical-terminating device of the optical-terminating devices, which does not generate traffic, on a basis of traffic information of a terminal device that moves among the plurality of wireless communication systems, and makes the estimated one optical-terminating device transition to a stopped state.

6. The optical transmission system according to claim 1 , wherein the wavelength allocator allocates, to one of the optical-terminating devices, a wavelength which is next longest or shortest after a wavelength currently allocated to another one of optical-terminating devices adjacent to the one among wavelengths capable of being allocated to the optical-terminating devices.

7. A wavelength allocation method which is performed by an optical transmission system which connects a plurality of wireless communication systems to each other, the wavelength allocation method comprising:
a step of monitoring traffic of optical-terminating devices connected to respective ones of the plurality of wireless communication systems during a terminal device moving among communicable range of the plurality of wireless communication systems;
a step of estimating a physical arrangement of the optical-terminating devices on a basis of transition of the traffic of the optical-terminating devices; and
a step of allocating different wavelengths to optical-terminating devices to which the wireless communication systems next to each other are connected, on a basis of the physical arrangement of the optical-terminating devices.

8. The optical transmission system according to claim 2 , wherein the wavelength allocator estimates one optical-terminating device of the optical-terminating devices, which does not generate traffic, on a basis of traffic information of a terminal device that moves among the plurality of wireless communication systems, and makes the estimated one optical-terminating device transition to a stopped state.

9. The optical transmission system according to claim 2 , wherein the wavelength allocator allocates, to one of the optical-terminating devices, a wavelength which is next longest or shortest after a wavelength currently allocated to another one of optical-terminating devices adjacent to the one among wavelengths capable of being allocated to the optical-terminating devices.

Assignees

• Nippon Telegraph & Telephone

Inventors

• Hisano Daisuke
• Shimada Tatsuya
• Terada Jun
• Ou hiroshi
• Nomura Hiroko

Classifications

• H04J14/0246 Primary

  using one wavelength per ONU · CPC title

• H04J14/0249 Primary

  for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU · CPC title

• H04L12/44

  Star or tree networks · CPC title

• H04B10/25752

  Optical arrangements for wireless networks · CPC title

• H04J14/0282

  WDM tree architectures · CPC title