Integrated access network

• US 9,608,760 B2
• Filed: 09/20/2012
• Issued: 03/28/2017
• Est. Priority Date: 09/21/2011
• Status: Expired due to Fees

• Current Assignee: Nanyang Technology University
• Original Assignee: Nanyang Technology University
• Inventors: Zhong, Wende, Pham, Quang Thai
• Primary Examiner(s): Phan, Hanh
• Application Number:
  US14/345,185
• Publication Number:
  US 20150010307A1
• Time in Patent Office: 1,650 Days
• Field of Search: 398/66, 398/67, 398/68, 398/69, 398/70, 398/71, 398/72, 398/76, 398/79, 398/82, 398/115, 398/183, 398/188, 398/135, 398/136, 398/137, 398/138, 398/139, 398/158, 398/159, 398/100
• US Class Current: 1/1
• CPC Class Codes: H04B 10/25754 Star network topology
• CPC Class Codes: H04B 10/27 Arrangements for networking
• CPC Class Codes: H04B 10/272 Star-type networks or tree-type networks
• CPC Class Codes: H04B 10/67 Optical arrangements in the receiver
• 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 14/0246 using one wavelength per ONU
• CPC Class Codes: H04J 14/025 using one wavelength per ONU, 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 2014/0253 Allocation of downstream wavelengths for upstream transmission

Abstract

The present invention is an optical terminal device comprising a signal modulator configured to generate a first signal modulated onto a first optical sideband of a first optical wavelength signal and a second signal modulated onto a second sideband of the first optical wavelength signal, the first signal being a different type than the second signal; a receiver configured to receive a third signal modulated onto the first optical sideband of a second optical wavelength signal and a fourth signal modulated onto a second sideband of the second optical wavelength signal, the third signal being a different type than the fourth signal; and a circulator coupled to the signal modulator and the receiver, wherein the circulator is configured to communicate with a node of an integrated network via an optical fiber. A remote node, a communication terminal, and a method of performing integrated network access are also disclosed.

Claims

1. An optical terminal device comprising:

a signal modulator configured to generate a first signal modulated onto a first optical sideband of a first optical wavelength signal and a second signal modulated onto a second sideband of the first optical wavelength signal;

a receiver configured to receive a third signal modulated onto a first optical sideband of a second optical wavelength signal and a fourth signal modulated onto a second sideband of the second optical wavelength signal; and

a circulator coupled to the signal modulator and the receiver, wherein the circulator is configured to communicate with a node of an integrated network via an optical fiber, wherein the first signal and the third signal are each a wired signal and the second signal and the fourth signal are each a wireless signal.

2. The optical terminal device of claim 1, further comprising a light source configured to generate a plurality of optical wavelength signals, wherein the plurality of optical wavelength signals comprises the first optical wavelength signal and the second optical wavelength signal.

3. The optical terminal device of claim 2, further comprising an electro-optical modulator arranged between the light source and the signal modulator, wherein the electro-optical modulator is configured to suppress a carrier of the first optical wavelength signal.

4. The optical terminal device of claim 1, further comprising a wired/wireless receiver configured to receive a downstream wired signal as the first signal and a downstream wireless signal as the second signal, wherein the wired/wireless receiver is connected to the signal modulator.

5. The optical terminal device of claim 4, further comprising an optical interleaver coupled to the signal modulator, wherein the interleaver is configured to combine the downstream wired and wireless signals.

6. The optical terminal device of claim 4, wherein the signal modulator is configured to modulate the first signal onto the first optical sideband of the first optical wavelength signal or the second signal onto the second optical sideband of the first optical wavelength signal using baseband modulation.

7. The optical terminal device of claim 1, wherein the signal modulator is a reflective semi-conductor optical amplifier (RSOA).

8. The optical terminal device of claim 1, further comprising a photo detector configured to detect an upstream wired signal as the third signal and an upstream wireless signal as the fourth signal, wherein the photo detector is connected to the receiver.

9. The optical terminal device of claim 8, further comprising a de-interleaver coupled to the receiver, wherein the de-interleaver is configured to separate the upstream signals.

10. The optical terminal device of claim 8, wherein the signal modulator comprises a plurality of signal modulators;

and wherein the photo detector comprises a plurality of photo detectors.

11. The optical terminal device of claim 10, further comprising a first pair of arrayed waveguide gratings (AWGs) coupled to the plurality of signal modulators, the first pair of AWGs configured to multiplex the modulated downstream wired signals and the modulated downstream wireless signals;

and a second pair of AWGs coupled to the plurality of photo detectors, the second pair of AWGs configured to de-multiplex the upstream wired signals and the upstream wireless signals.

12. A remote node comprising:

a relay unit configured to relay, between an optical terminal device and a first communication terminal of an integrated network, a first signal modulated onto a first optical sideband of a first optical wavelength signal and a second signal modulated onto a first optical sideband of a second optical wavelength signal; and

relay, between the optical terminal device and a second communication terminal of the integrated network, a third signal modulated onto a second optical sideband of the first optical wavelength signal and a fourth signal modulated onto a second sideband of the second optical wavelength signal, wherein the first signal and the third signal are each a wired signal and the second signal and the fourth signal are each a wireless signal.

13. The remote node of claim 12, further comprising:

a first transceiver configured to receive and transmit a downstream wired signal as the first signal and an upstream wired signal as the second signal; and

a second transceiver configured to receive and transmit a downstream wireless signal as the third signal and an upstream wireless signal as the fourth signal,

wherein the first transceiver and the second transceiver are optically coupled to the relay unit.

14. The remote node of claim 12, further comprising:

an interleaver configured to communicate with the optical terminal device of the integrated network via an optical fiber; and

a set of arrayed waveguide gratings (AWGs) arranged between the interleaver of the remote node and a plurality of communication terminals of the integrated network, the plurality of communication terminals comprising the first communication terminal and the second communication terminal.

15. The remote node of claim 14, wherein for the plurality of communication terminals, the interleaver is configured to combine the upstream wired signals and the upstream wireless signals, or to separate the downstream wired signals and the downstream wireless signals.

16. A communication terminal comprising:

a first interface configured to optically communicate with a remote node of an integrated network;

a second interface configured to electrically communicate with a communication device; and

a converter arranged between the first and the second interfaces, the converter configured to convert a first signal from an optical form to an electrical form and convert a second signal from the electrical form to the optical form,

wherein the first signal being converted from the optical form to the electrical form is received from the first interface and is modulated onto a first optical sideband of a first optical wavelength signal; and

wherein the second signal being converted from the electrical form to the optical form is output to the first interface and is modulated onto a first optical sideband of a second optical wavelength signal.

17. The communication terminal of claim 16, further comprising a coupler transceiver configured to receive a downstream signal as the first signal, and to transmit an upstream signal as the second signal.

18. The communication terminal of claim 17, wherein the converter comprises a reflective semi-conductor optical amplifier (RSOA) configured to perform a re-modulation of the upstream signal.

19. The communication terminal of claim 18, wherein the RSOA is further configured to receive a part of the downstream signal to perform the re-modulation.