Augmenting passive optical networks

• US 8,374,508 B2
• Filed: 12/24/2009
• Issued: 02/12/2013
• Est. Priority Date: 06/12/2003
• Status: Active Grant

• Current Assignee: Alexander I. Soto, Walter G. Soto
• Original Assignee: Alexander I. Soto, Walter G. Soto
• Inventors: Soto, Alexander I, Soto, Walter G
• Primary Examiner(s): Sedighian, M. R.
• Application Number:
  US12/646,978
• Publication Number:
  US 20100150566A1
• Time in Patent Office: 1,146 Days
• Field of Search: 398/140, 398/141, 398/115, 398/116, 398/128, 398/130, 398/135, 398/138
• US Class Current: 398/115
• CPC Class Codes: H04B 10/272 Star-type networks or tree-type networks
• CPC Class Codes: H04W 4/18 Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals

Abstract

Passive optical networks have optical budget loss limitations that affect the ability of a Service Provider to serve a limited number of clients over a limited range. The deployment of passive optical networks is constrained by potential physical rights of way issues. A method and system for augmenting communication links of a passive optical network are disclosed which utilize radio frequency communication enabling an increase in the number of clients on the network as well as increasing the reach or range of the network while potentially eliminating physical rights of way issues.

Claims

1. A passive optical network converter of optical signals and radio signals adapted to perform transmission convergence layer or media access controller functions and adapted to be assigned a network address by an optical line terminal and adapted to down convert a received high frequency radio signal to a lower frequency signal and adapted to adjust optical transmit power levels of a burst-mode optical transmitter and adapted to transmit a burst-mode optical signal responsive to the lower frequency signal and adapted to up convert a received optical signal to a higher frequency signal and adapted to transmit a continuous-mode radio signal responsive to the higher frequency signal.

2. The converter of claim 1, including means for manual adjustment of the optical transmit power levels.

3. The converter of claim 1, wherein the converter is adapted to adjust the optical transmit power level or radio transmit power level responsive to communication from the optical line terminal.

4. The converter of claim 1, wherein the converter is adapted to adjust a radio parameter setting responsive to communication from the optical line terminal.

5. The converter of claim 1, wherein the converter reports the optical receive power level, radio receive power level, or a radio parameter setting to the optical line terminal.

6. The converter of claim 1, wherein the converter is adapted to perform quadrature modulation combining two optical signals into a single radio signal or separating a radio signal into two optical signals.

7. A converter of optical signals and radio signals in a passive optical network, the passive optical network having an optical line terminal, the converter comprising:

an optical port;

a passive optical network protocol processor having a transmission convergence layer and adapted to be assigned a network address by the optical line terminal, the passive optical protocol processor adapted to receive, process and respond to network communications responsive to network communications initiated from the optical line terminal and addressed to the passive optical network protocol processor;

radio circuitry adapted to modulate a low frequency signal to a higher frequency signal and adapted to demodulate a high frequency signal to a lower frequency signal; and

an antenna port,

whereby the converter is adapted to transmit a radio signal responsive to a received optical signal and is adapted to transmit an optical signal responsive to a received radio signal.

8. The converter of claim 7, wherein the passive optical network protocol processor includes a media access controller (MAC).

9. The converter of claim 7, wherein the optical port includes an optical transceiver.

10. The converter of claim 7, wherein converter is adapted to adjust the optical or radio transmit power level responsive to communication from the optical line terminal.

11. The converter of claim 7, wherein the converter is adapted to adjust a radio filter setting responsive to communication from the optical line terminal.

12. The converter of claim 7, wherein the radio circuitry is adapted to perform quadrature modulation.

13. A passive optical network having an optical line terminal, a plurality of optical network units, a plurality of passive optical splitters and at least one communication link between the optical line terminal and an optical network unit, the passive optical network communication link comprising:

an optical line terminal coupled to a first optical fiber and adapted to transmit a first optical signal and receive a second optical signal;

a first converter coupled to the first optical fiber and coupled to a first antenna, the first converter adapted to transmit a first radio signal through the first antenna responsive to the first optical signal received through the first optical fiber and adapted to transmit the second optical signal through the first optical fiber responsive to a second radio signal received over the first antenna;

a second converter coupled to a second optical fiber and coupled to a second antenna, the second converter adapted to transmit a third optical signal through the second optical fiber responsive to the first radio signal received over the second antenna and adapted to transmit a second radio signal through the second antenna responsive to a forth optical signal received through the second optical fiber;

a passive optical splitter coupled to the second optical fiber and coupled to a third optical fiber; and

an optical network unit coupled to the third optical fiber and adapted to receive the third optical signal and adapted to transmit the forth optical signal;

whereby the communications between the optical line terminal and the optical network unit of a passive optical network includes radio signal communications across a radio link.

14. The passive optical network of claim 13, wherein the optical network unit is an optical network terminal or is an electronics unit that terminates the passive optical network and may present one or more converged interfaces, such as DSL, MoCA, G.hn, WiFi or Ethernet, toward a subscriber.

15. The passive optical network of claim 13, the passive optical network further comprising a second passive optical splitter coupled between the optical line terminal and the first converter.

16. The passive optical network of claim 15, wherein the passive optical splitters employ Brewster'"'"'s angle principals.

17. The passive optical network of claim 13, the first converter adapted to adjust optical transmit power levels.

18. The passive optical network of claim 13, wherein the first or second converter comprise a passive optical network protocol processor which includes transmission convergence layer or media access controller functions.

19. The passive optical network of claim 13, wherein the first and second converter are adapted to perform quadrature modulation.