PON system, wireless network system, data transfer method, OLT, and ONU

Patent metadata

Field	Value
Publication number	US-11036871-B2
Application number	US-201716332777-A
Country	US
Kind code	B2
Filing date	Sep 13, 2017
Priority date	Sep 13, 2016
Publication date	Jun 15, 2021
Grant date	Jun 15, 2021

Abstract

An OLT (10) is provided with a priority control bypass circuit (16) and an encryption/decryption bypass circuit (17), or an ONU (20) is provided with a priority control bypass circuit (26) and an encryption/decryption bypass circuit (27), and one or both of encryption/decryption processing and priority control processing are bypassed in accordance with a priority control bypass instruction (BP) and an encryption/decryption bypass instruction (BE), which are set in advance. This reduces a processing delay that occurs in the OLT or the ONU.

First claim

The invention claimed is:

1. A PON system including one OLT and a plurality of ONUs and configured to transfer data between the OLT and the plurality of ONUs via a PON, a PON device, which is at least either one of the OLT or each of the plurality of ONUs, comprising:
an encryption/decryption processing circuit configured to perform encryption/decryption processing for the data;
a priority control circuit configured to perform priority control processing for the data; and
a bypass circuit configured to bypass at least one of the encryption/decryption processing circuit and the priority control circuit in accordance with a preset bypass instruction.

2. The PON system according to claim 1 , wherein the bypass circuit comprises:
an IF matching processing circuit configured to receive input data input to a target process as a target of the bypass and match an interface concerning the input data with non-bypass data obtained by applying the target process to the input data, thereby generating bypass data that has bypassed the target process; and
a selector configured to switch and select one of the non-bypass data and the bypass data in accordance with the bypass instruction.

3. The PON system according to claim 2 , further comprising a control encryption/decryption processing circuit configured to perform encryption/decryption processing for control data used for control of the PON system,
wherein the PON device further comprises:
an encryption/decryption bypass circuit serving as the bypass circuit and configured to bypass the encryption/decryption processing in accordance with the bypass instruction; and
a PON protocol processing circuit connected between the encryption/decryption processing circuit and the priority control circuit and configured to exchange the data between the priority control circuit and the encryption/decryption processing circuit and also exchange the control data with the encryption/decryption processing circuit, and
the control encryption/decryption processing circuit switches presence/absence of application of the encryption/decryption processing to the control data exchanged by the PON protocol processing circuit, in accordance with presence/absence of bypass of the encryption/decryption processing by the encryption/decryption bypass circuit.

4. The PON system according to claim 2 , wherein the PON device further comprises:
a priority control bypass circuit serving as the bypass circuit and configured to bypass the priority control processing in accordance with the bypass instruction; and
a PON protocol processing circuit connected between the encryption/decryption processing circuit and the priority control circuit and configured to exchange the data between the priority control circuit and the encryption/decryption processing circuit and also exchange the control data used for control of the PON system with the encryption/decryption processing circuit, and
the PON protocol processing circuit switches whether to execute, in the PON protocol processing circuit, control on a priority basis concerning the data to be output to the encryption/decryption processing circuit, in accordance with presence/absence of bypass of the priority control processing by the priority control bypass circuit.

5. The PON system according to claim 2 , wherein the PON device further comprises:
a priority control bypass circuit serving as the bypass circuit and configured to bypass the priority control processing in accordance with the bypass instruction; and
a PON protocol processing circuit connected between the encryption/decryption processing circuit and the priority control circuit and configured to exchange the data between the priority control circuit and the encryption/decryption processing circuit and also exchange the control data used for control of the PON system with the encryption/decryption processing circuit, and
the PON protocol processing circuit switches whether to output an output permission to the priority control bypass circuit or output the output permission to the priority control circuit, in accordance with presence/absence of bypass of the priority control processing by the priority control bypass circuit.

6. The PON system according to claim 2 , wherein the PON device further comprises:
a priority control bypass circuit serving as the bypass circuit and configured to bypass the priority control processing in accordance with the bypass instruction; and
a PON protocol processing circuit connected between the encryption/decryption processing circuit and a side of the PON and configured to exchange the data between the encryption/decryption processing circuit and the side of the PON and also exchange the control data used for control of the PON system with the side of the PON, and
the PON protocol processing circuit switches whether to execute, in the PON protocol processing circuit, control on a priority basis concerning the data to be output to the side of the PON, in accordance with presence/absence of bypass of the priority control processing by the priority control bypass circuit.

7. The PON system according to claim 2 , wherein the PON device further comprises:
a priority control bypass circuit serving as the bypass circuit and configured to bypass the priority control processing in accordance with the bypass instruction; and
a PON protocol processing circuit connected between the encryption/decryption processing circuit and a side of the PON and configured to exchange the data between the encryption/decryption processing circuit and the side of the PON and also exchange the control data used for control of the PON system with the side of the PON, and
the PON protocol processing circuit switches whether to output an output permission to the priority control bypass circuit or output the output permission to the priority control circuit, in accordance with presence/absence of bypass of the priority control processing by the priority control bypass circuit.

8. The PON system according to claim 2 , wherein the PON device includes
a set of the encryption/decryption processing circuit and the encryption/decryption bypass circuit provided for each wavelength of an optical signal transmitted/received by the PON, and
a PON protocol processing circuit, provided commonly to the wavelengths, the PON protocol processing circuit being connected between the encryption/decryption processing circuit and the priority control circuit and configured to exchange the data between the priority control circuit and the encryption/decryption processing circuit and also exchange the control data used for control of the PON system with the encryption/decryption processing circuit, and
the PON protocol processing circuit exchanges the control data using, of the wavelengths, a wavelength for which the encryption/decryption processing is not bypassed by the encryption/decryption bypass circuit.

9. A wireless network system including one central station and one or a plurality of radio stations configured to perform wireless communication with one or a plurality of user terminals accommodated under the radio stations and configured to divisionally execute a plurality of wireless protocol processes between the central station and the radio station, wherein
a mobile fronthaul configured to transfer data transmitted/received by the user terminal between the central station and the radio station comprises a PON system of claim 2 .

10. The PON system according to claim 1 , further comprising a control encryption/decryption processing circuit configured to perform encryption/decryption processing for control data used for control of the PON system,
wherein the PON device further comprises:
an encrypt

Assignees

• Nippon Telegraph & Telephone

Inventors

• Sakamoto Takeshi
• Kawai Kenji
• Kato Junichi
• Terada Kazuhiko
• Uzawa Hiroyuki
• Tanaka Nobuyuki
• Kawamura Tomoaki

Classifications

• H04Q11/0067

  Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring · CPC title

• H04Q11/0062

  Network aspects · CPC title

• H04B10/85

  Protection from unauthorised access, e.g. eavesdrop protection · CPC title

• H04B10/27

  Arrangements for networking · CPC title

• H04B10/25754 Primary

  Star network topology · CPC title