PASSIVE OPTICAL NETWORK SYSTEM FOR THE DELIVERY OF BI-DIRECTIONAL RF SERVICES

• US 20080310843A1
• Filed: 06/15/2007
• Published: 12/18/2008
• Est. Priority Date: 06/15/2007
• Status: Active Grant

• Current Assignee: Northpeak Enterprises Incorporated
• Original Assignee: Alloptic, Inc. (Communications Test Design Incorporated)
• Inventors: Warner, Tom, Gadkari, Ketan
• Granted Patent: US 7,965,939 B2
• Time in Patent Office: Days
• US Class Current: 398/72
• CPC Class Codes: H04B 10/272 Star-type networks or tree-type networks
• CPC Class Codes: H04J 14/0226 Fixed carrier allocation, e.g. according to service
• CPC Class Codes: H04J 14/0227 Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
• CPC Class Codes: H04J 14/0232 for downstream transmission
• CPC Class Codes: H04J 14/0239 in WDM-PON sharing multiple downstream wavelengths for groups of optical network units [ONU], e.g. multicasting wavelengths
• CPC Class Codes: H04J 14/0247 Sharing one wavelength for at least a group of ONUs
• CPC Class Codes: H04J 14/0252 Sharing one wavelength for at least a group of ONUs, e.g. for transmissions from-ONU-to-OLT or from-ONU-to-ONU
• CPC Class Codes: H04J 14/0282 WDM tree architectures
• CPC Class Codes: H04J 14/0298 with sub-carrier multiplexing [SCM]
• CPC Class Codes: H04N 7/22 Adaptations for optical transmission
• CPC Class Codes: H04Q 11/0067 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

Abstract

A system for providing bi-directional RF services over relating to a point-to-multipoint Passive Optical Network (PON).

Claims

1. A point-to-multipoint passive optical network (PON) system comprising:

a. a first RF Optical Transmitter;

b. a first RF Optical Receiver;

c. a first Wave-Division-Multiplexer (WDM) comprising a first upstream port, a second upstream port, and at least one downstream port;

d. an optical fiber connecting the first RF Optical Transmitter to the first upstream port of the first WDM;

e. an optical fiber connecting the first RF Optical Receiver to the second upstream port of the first WDM;

f. an optical splitter with at least one upstream port and a plurality of downstream ports;

g. an optical fiber connecting the downstream port of the first WDM to at least one upstream port of the optical splitter;

h. one or more nodes, each node comprising;

i. a first upstream port;

ii. a downstream port;

iii. a second RF optical transmitter comprising an upstream port and a downstream port;

iv. a second RF optical receiver comprising an upstream port and a downstream port;

v. a second Wave-Division-Multiplexer (WDM) comprising an upstream port, a first downstream port, and a second downstream port;

vi. an optical fiber connecting the upstream port of the node to the upstream port of the second WDM;

vii. an optical fiber connecting the first downstream port of the WDM to the upstream port of the second RF Optical Transmitter;

viii. an optical fiber connecting the second downstream port of the WDM to the upstream port of the second RF Optical Receiver; and

ix. a diplexer, the diplexer connected to the second RF Optical Transmitter, the second RF Optical Receiver, and the downstream port of the node.

2. The system of claim 1 further comprising:

a. an OLT connected to the third upstream port of the first WDM; and

b. one or more multi-wavelength capable ONUs connected to additional downstream ports of the optical splitter.

3. The system of claim 1 where the PON system is based on IEEE-802.3.

4. The system of claim 1 where the PON system is based on ITU-984.X.

5. A point-to-multipoint passive optical network (PON) system comprising:

a. an Optical Line Terminal (OLT);

b. a first RF Optical Transmitter;

c. a first RF Optical Receiver;

d. a first Wave-Division-Multiplexer (WDM) comprising a first upstream port, a second upstream port, a third upstream port, and at least one downstream port;

e. an optical fiber connecting the first RF Optical Transmitter to the first upstream port of the first WDM;

f. an optical fiber connecting the first RF Optical Receiver to the second upstream port of the first WDM;

g. an optical fiber connecting the OLT to the third upstream port of the first WDM;

h. an optical splitter with at least one upstream port and a plurality of downstream ports;

i. an optical fiber connecting the downstream port of the first WDM to at least one upstream port of the optical splitter;

j. one or more nodes, each node comprising;

i. a first upstream port;

ii. a second upstream port;

iii. a downstream port;

iv. a second RF optical transmitter comprising an upstream port and a downstream port;

v. a second Wave-Division-Multiplexer (WDM) comprising a first upstream port, a second upstream port, and a downstream port;

vi. an optical fiber connecting the first upstream port of the second WDM and the first upstream port of the node;

vii. an optical fiber connecting the second upstream port of the second WDM and the second upstream port of the node;

viii. an optical fiber connecting the downstream port of the second WDM to the upstream port of the second RF Optical Transmitter; and

ix. an RF connection between the downstream port of the second RF Optical Transmitter and the downstream port of the node;

k. an optical fiber connecting a downstream port of the optical splitter to the first upstream port of the node;

l. at least one three-wave length ONU, comprising;

i. an upstream port; and

ii. a downstream port;

m. an optical fiber connecting the second upstream port of the node to the upstream port of the ONU; and

n. a diplexer, the diplexer connected to the downstream port of the ONU, the downstream port of the node, and an RF distribution network.

6. The system of claim 5 further comprising:

a. one or more multi-wavelength capable ONUs connected to additional downstream ports of the optical splitter.

7. The system of claim 5, where the PON system is based on IEEE-802.3.

8. The system of claim 5, where the PON system is based on ITU-984.X.

9. A point-to-multipoint passive optical network (PON) system comprising:

a. an Optical Line Terminal (OLT);

b. a first RF Optical Transmitter;

c. a first RF Optical Receiver;

d. a first Wave-Division-Multiplexer (WDM) comprising a first upstream port, a second upstream port, a third upstream port, and at least one downstream port;

e. an optical fiber connecting the first RF Optical Transmitter to the first upstream port of the first WDM;

f. an optical fiber connecting the first RF Optical Receiver to the second upstream port of the first WDM;

g. an optical splitter with at least one upstream port and a plurality of downstream ports;

h. an optical fiber connecting the OLT to the third upstream port of the first WDM;

i. an optical fiber connecting the downstream port of the first WDM to at least one upstream port of the optical splitter;

j. one or more nodes, each node comprising;

i. a first upstream port;

ii. a second upstream port;

iii. a downstream port;

iv. a second RF optical transmitter comprising an upstream port and a downstream port;

v. a second RF optical receiver comprising an upstream port and a downstream port;

vi. a second Wave-Division-Multiplexer (WDM) comprising a first upstream port, a second upstream port, and a downstream port;

vii. a third Wave-Division-Multiplexer (WDM) comprising an upstream port, a first downstream port, and a second downstream port;

viii. an optical fiber connecting the first upstream port of the second WDM to the first upstream port of the node;

ix. an optical fiber connecting the second upstream port of the second WDM to the second upstream port of the node;

x. an optical fiber connecting the downstream port of the second WDM to the upstream port of the third WDM;

xi. an optical fiber connecting the first downstream port of the third WDM to the upstream port of the second RF Optical Transmitter;

xii. an optical fiber connecting the second downstream port of the third WDM to the upstream port of the second RF Optical Receiver; and

xiii. a diplexer, the diplexer connected to the downstream port of the second RF Optical Transmitter, the downstream port of the second RF Optical Receiver, and the downstream port of the node;

k. an optical fiber connecting a downstream port of the optical splitter to the first upstream port of the node;

l. at least one two-wavelength capable ONU, comprising;

i. an upstream port; and

ii. a downstream port; and

m. an optical fiber connecting the second upstream port of the node to the upstream port of the ONU.

10. The system of claim 9 further comprising one or more additional multi-wavelength capable ONUs connected to additional downstream ports of the optical splitter.

11. The system of claim 9, where the PON system is based on IEEE-802.3.

12. The system of claim 9, where the PON system is based on ITU-984.x.