# US 2013/0156427 A1 · Afdx network with a passive optical network

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- Number: US 2013/0156427 A1
- Document ID: US20130156427A1
- Status: Published application
- Kind: A1
- Application number: 13/715,105
- Filed: 2012-12-14
- Published: 2013-06-20
- Earliest claimed: 2011-12-15
- Assignees: Airbus Operations GmbH
- Inventors: Juan LOPEZ; Jean-Bernard ITIER
- Web page: https://patentgrep.com/patent/US20130156427A1

## CPC

- H04B 10/27: Arrangements for networking
- H04J 14/0232: {for downstream transmission}
- H04J 14/025: {using one wavelength per ONU, e.g. for transmissions from-ONU-to-OLT or from-ONU-to-ONU}
- H04J 14/0282: {WDM tree architectures}
- H04L 12/413: with random access, e.g. carrier-sense multiple-access with collision detection [CSMA-CD]
- H04L 12/4633: {Interconnection of networks using encapsulation techniques, e.g. tunneling}
- H04L 12/4641: {Virtual LANs, VLANs, e.g. virtual private networks [VPN] (LAN interconnection over a bridge based backbone H04L12/462; encapsulation techniques H04L12/4633; routing of packets H04L45/00; packet switches H04L49/00; virtual private networks for security H04L63/0272)}
- 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}
- H04J 14/0247: {Sharing one wavelength for at least a group of ONUs}
- H04L 67/12: specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
- H04Q 11/0071: {Provisions for the electrical-optical layer interface}
- H04B: TRANSMISSION
- H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04Q: SELECTING (switches, relays, selectors H01H; wireless communication networks H04W)

## Abstract

The present invention concerns an AFDX network which is extended by a passive optical network or PON. The AFDX network comprises an AFDX switch to which are connected a plurality of equipments. The AFDX switch constitutes the optical line termination and said equipments constitute the optical network terminations of the PON. The PON broadcasts over the downlink, to all said equipments, every AFDX frame output by said AFDX switch. It also multiplexes over the uplink the AFDX frames transmitted by the same equipments. The invention also concerns an μAFDX network using a PON.

## Claims

### Claim 1

An AFDX frame switching network comprising at least one AFDX frame switch to which are connected a plurality of equipments, at least one terminal being a subscriber to said network, characterised in that it comprises a passive optical network, the optical line terminal of which consists of the AFDX frame switch and the optical network terminals of which consist of said equipments, said passive optical network broadcasting over the downlink every AFDX frame output by said frame switch to all said equipments and multiplexing over the uplink the AFDX frames transmitted by said equipments.

### Claim 2 (depends on 1)

The network according to claim 1, characterised in that the passive optical network comprises an optical coupler, connected to a port of said frame switch by a first optical fiber, on one hand, and to said equipments by a plurality of second optical fibers, on the other hand.

### Claim 3 (depends on 1)

The network according to claim 1, characterised in that the passive optical network multiplexes over the uplink the AFDX frames respectively transmitted by said equipments using a multiplexing by transmission time interval, a distinct transmission time interval being allocated to each equipment.

### Claim 4 (depends on 3)

The network according to claim 3, characterised in that said frame switch controls the allocation of the transmission time intervals to said equipments.

### Claim 5 (depends on 3)

The network according to claim 3, characterised in that a subscriber to this network controls the allocation of the transmission time intervals to said equipments.

### Claim 6 (depends on 1)

The network according to claim 1, characterised in that the passive optical network multiplexes over the uplink the AFDX frames respectively transmitted by said equipments using a wavelength multiplexing, a distinct wavelength being allocated to each equipment.

### Claim 7 (depends on 2)

The network according to claim 2, characterised in that, for a virtual link output by a first equipment and intended to a second equipment of said plurality, the first and second equipments being connected to the optical coupler, said virtual link being incident on said port of the frame switch, said switch loops this virtual link back to said port.

### Claim 8 (depends on 7)

The network according to claim 7, characterised in that said frame switch contains a switching table for switching frames relating to different virtual links, said table indicating, for each virtual link, an input port and an output port of said switch, a frame relating to this virtual link received on said input port being switched on said output port, said table further indicating that the output port is identical to the input port for said virtual link output by the first equipment and intended to the second equipment.

### Claim 9 (depends on 2)

The network according to claim 2, characterised in that a terminal being a subscriber to the AFDX network is connected to a second port of the frame switch, distinct from said port, the subscriber terminal looping back any virtual link coming from a first equipment and intended to a second equipment of said plurality.

### Claim 10

An AFDX frame switching network comprising a terminal and a plurality of equipments, being subscribers to the network, characterised in that said network comprises a passive optical network, the optical line terminal of which consists of said terminal and the optical network terminals of which consist of said equipments, said passive optical network broadcasting over the downlink every AFDX frame transmitted by said terminal to all said equipments and multiplexing over the uplink the AFDX frames transmitted by said equipments.

### Claim 11 (depends on 10)

The network according to claim 10, characterised in that the passive optical network comprises an optical coupler, connected to said terminal by a first optical fiber, on the one hand, and to said equipments by a plurality of second optical fibers, on the other hand.

### Claim 12 (depends on 10)

The network according to claim 10, characterised in that the passive optical network multiplexes over the uplink the AFDX frames respectively transmitted by said equipments using a multiplexing by transmission time interval, a distinct transmission time interval being allocated to each equipment.

### Claim 13 (depends on 12)

The network according to claim 12, characterised in that said terminal (510) controls the allocation of the transmission time intervals to said equipments.

### Claim 14 (depends on 10)

The network according to claim 10, characterised in that the passive optical network multiplexes over the uplink the AFDX frames respectively transmitted by said equipments using a wavelength multiplexing, a distinct wavelength being allocated to each equipment.

### Claim 15 (depends on 11)

The network according to claim 11, characterised in that said terminal comprises a physical interface to which is connected said first optical fiber, an AFDX interface, communicating with said physical interface and storing the AFDX frames received or to be transmitted by the latter in a plurality of mailboxes, each mailbox being associated with a virtual link in reception or transmission, and an applicative module controlling said AFDX interface.

### Claim 16 (depends on 15)

The network according to claim 15, characterised in that the AFDX interface contains a table indicating for each virtual link identifier a mailbox in transmission or reception, said AFDX interface reading virtual link identifiers present in the headers of the AFDX frames received by the physical interface and storing these frames in the reception mailboxes as a function of these virtual link identifiers.

### Claim 17 (depends on 15)

The network according to claim 15, characterised in that, for a virtual link between first and second equipments of said plurality of equipments, said applicative module reads the AFDX frames stored in the reception mailboxes associated with this virtual link and stores them in the transmission mailboxes associated with the same virtual link.