WO2014101001A1

WO2014101001A1 - Wavelength identification method, device, and system

Info

Publication number: WO2014101001A1
Application number: PCT/CN2012/087535
Authority: WO
Inventors: 叶飞; 罗远秋
Original assignee: 华为技术有限公司
Priority date: 2012-12-26
Filing date: 2012-12-26
Publication date: 2014-07-03
Also published as: CN104137444A; CN104137444B

Abstract

A wavelength identification method, device, and system. The method comprises: when a first optical network unit requests for wavelength allocation, a first port controller receiving a first packet sent by a domain controller or an inter-domain controller, wherein the first packet at least comprises: a first wavelength tag; the first packet is a packet used for communication between the domain controller and the first port controller; or, the first packet is a packet used for communication between the inter-domain controller and the first port controller; the first port controller acquiring a first wavelength identity of the first optical network unit according to the first wavelength tag of the first packet; and the first port controller sending a second packet to the first optical network unit, wherein the second packet at least comprises: the first wavelength identity of the first optical network unit; the second packet is a packet used for communication between the first port controller and the first optical network unit; and the first wavelength identity is used for identifying a wavelength adopted by the first optical network unit for sending an optical signal to an optical line terminal.

Description

Wavelength identification method, device and system

The present invention relates to the field of communications technologies, and in particular, to a wavelength identification method, apparatus, and system. Background technique

In the TWDM-PON (Time-Wavelength Division Multiplexing-Passive Optical Network), since there are many pairs of wavelengths in the uplink and downlink directions, it is necessary to use the control field to the wavelength ID (identity, The identification is performed to identify the wavelength of the OLT (Optical Line Terminal) and the ONU (Optical Network Unit).

In the prior art, the MAC (Medium Access Control) protocol of the TWDM-PON inherits the existing PON standard, and a control field is set in the frame structure, and a data bit with a small number of bits is reserved in the control field. Perform a wavelength ID description. For example, the 10G-Gigabit passive optical network (GPON) 10G-Gigabit passive optical network is wavelength-identified by the wavelength ID. The specificity is as follows: The X bit of the PON-ID field in the frame structure is used for the description of the downlink wavelength ID; in the uplink direction, the reserved y bit of the Ind field in the existing frame structure is used for the description of the uplink wavelength ID. However, due to differences in physical media and communication standards and compatibility considerations, the above wavelength identification methods are generally only used in PON networks, but not in Ethernet or IP (Internet Protocol) networks.

It can be seen that the existing wavelength identification methods are different for different application networks, and there are certain limitations when used.

Summary of the invention

The present invention solves the above technical problems in the background art, and proposes a wavelength identification method, device and system to be compatible with the method for identifying wavelengths in different networks.

The technical solution of the present invention is:

The embodiment of the present invention provides a wavelength identification method, which is applied in a time division-wavelength division multiplexing passive optical network system, where the time division-wavelength division multiplexing passive optical network system includes: an optical line terminal and a first optical network unit. The optical line terminal includes: a domain controller and a first port controller; or, the optical line The terminal includes: an inter-domain controller and a first port controller, and the method includes:

When the first optical network unit requests to perform wavelength allocation, the first port controller receives the first packet sent by the domain controller or the inter-domain controller, where the first packet includes at least: the first wavelength label The first packet is a packet used for communication between the domain controller and the first port controller, or the first packet is the inter-domain controller and the first packet. a message used for communication between a port controller;

The first port controller acquires a first wavelength identifier of the first optical network unit according to the first wavelength label of the first packet;

The first port controller sends a second packet to the first optical network unit, where the second packet includes: at least: a first wavelength identifier of the first optical network unit; And a packet used by the first port controller to communicate with the first optical network unit, where the first wavelength identifier is used to identify a wavelength used by the first optical network unit to send an optical signal to the optical line terminal.

Preferably, the first port controller acquires the first wavelength identifier of the first optical network unit according to the first wavelength label of the first packet, and specifically includes:

The first port controller searches for the first wavelength conversion table according to the first wavelength label of the first packet, and acquires a first wavelength identifier corresponding to the first wavelength label; wherein, the first wavelength conversion The table includes: a correspondence between the first wavelength label and the first wavelength identifier; or

The first port controller searches for the first wavelength conversion table according to the first wavelength label of the first packet, and obtains a first wavelength value corresponding to the wavelength label. The first wavelength conversion table includes : a correspondence between the first wavelength label and the first wavelength value;

The first port controller acquires a first wavelength identifier corresponding to the first wavelength value according to the first wavelength value.

Preferably, the first packet further includes: a second wavelength label.

Preferably, the method further includes:

The first port controller acquires a second wavelength identifier of the first optical network unit according to the second wavelength label field of the first packet, where the second wavelength identifier is used to identify the first optical network The unit receives the wavelength used by the optical signal transmitted by the optical line terminal.

Preferably, the second packet further includes: a second wavelength identifier of the first optical network unit. Preferably, the first port controller obtains according to the second wavelength label field of the first packet. Taking the second wavelength identifier of the first optical network unit, specifically:

The first port controller searches the first wavelength conversion table according to the second wavelength label field of the second packet, and acquires a second wavelength identifier corresponding to the second wavelength label field. The wavelength conversion table includes: a correspondence between the second wavelength label field and the second wavelength identifier; or the first port controller searches for the first wavelength conversion table according to the second wavelength label field of the first packet, and obtains a second wavelength value corresponding to the second wavelength label field; wherein, the first wavelength conversion table includes: a correspondence between a second wavelength label field and a second wavelength value;

The first port controller acquires a second wavelength identifier corresponding to the second wavelength value according to the second wavelength value.

A wavelength identification method is applied in a time division-wavelength division multiplexing passive optical network system, where the time division-wavelength division multiplexing passive optical network system comprises: an optical line terminal and an optical network unit, where the optical line terminal comprises: The domain controller and the first port controller; or the optical line terminal includes: an inter-domain controller and a first port controller, where the method includes:

When the first optical network unit requests to perform wavelength allocation, the domain controller or the inter-domain controller allocates a first wavelength identifier or a first wavelength value to the first optical network unit according to the request; The first wavelength identifier or the first wavelength value is used to identify a wavelength used by the first optical network unit to send an optical signal to the optical line terminal;

Determining, by the domain controller or the inter-domain controller, the first wavelength label according to the first wavelength identifier or the first wavelength value;

Generating, by the domain controller or the inter-domain controller, a first packet according to the first wavelength label;

The domain controller or the inter-domain controller sends the first packet to the first port controller.

Preferably, the domain controller or the inter-domain controller acquires the first wavelength label according to the first wavelength identifier or the first wavelength value, and specifically includes:

Determining, by the domain controller or the inter-domain controller, the first wavelength conversion table according to the first wavelength identifier or the first wavelength value, and acquiring the first wavelength identifier or the first wavelength value a value of a wavelength label; wherein, the first wavelength conversion table at least includes: a correspondence between the first wavelength identifier and the first wavelength label; or, the first wavelength conversion table includes at least: Corresponding relationship between the first wavelength value and the first wavelength label.

Preferably, the wavelength label includes at least the following fields: Grid, channel and n.

A port control device is applied to an optical line terminal, including:

a first packet receiving unit, configured to receive, by the optical network unit, a first packet sent by the domain controller or the inter-domain controller, where the first packet is the domain controller Or the packet used for communication between the inter-domain controllers, where the first packet includes: a first wavelength label; the first wavelength identifier acquiring unit, configured to obtain, according to the first wavelength label of the first packet, a first wavelength identifier of the optical network unit;

a second packet sending unit, configured to send a second packet to the optical network unit, where the second packet includes: at least: a first wavelength identifier of the optical network unit; And a packet used for communication between the optical network units, where the first wavelength identifier is used to identify a wavelength used by the optical network unit to send an optical signal.

Preferably, the first wavelength identifier acquiring unit specifically includes:

a first searching module, configured to search, according to the first wavelength label of the first packet, a first wavelength conversion table, where the first wavelength conversion table includes: a correspondence between a first wavelength label and a first wavelength identifier ;

a first acquiring module, configured to acquire a first wavelength identifier corresponding to the first wavelength label; or

a second search module, configured to: search for a first wavelength conversion table according to the first wavelength label of the first packet, and obtain a first wavelength value corresponding to the wavelength label; where the first wavelength conversion table includes : a correspondence between the first wavelength label and the first wavelength value;

And a second acquiring module, configured to acquire, according to the first wavelength value, a first wavelength identifier corresponding to the first wavelength value.

Preferably, the first packet further includes: a second wavelength label, the device further includes: a second wavelength identifier acquiring unit, configured to acquire, according to the second wavelength label field of the first packet, The second wavelength identifier of the first optical network unit.

Preferably, the second packet sending unit is further configured to:

The second packet further includes: a second wavelength identifier of the first optical network unit, where the second wavelength identifier is used to identify that the first optical network unit receives the light sent by the optical line terminal The wavelength used by the signal,

Preferably, the second wavelength identifier acquiring unit specifically includes:

a third search module, configured to search the first wavelength conversion table according to the second wavelength label field of the second packet, where the first wavelength conversion table includes: a second wavelength label field and a second wavelength label Correspondence relationship

a third acquiring module, configured to acquire a second wavelength identifier corresponding to the second wavelength label field; or

a fourth search module, configured to: search a first wavelength conversion table according to the second wavelength label field of the first packet, and obtain a second wavelength value corresponding to the second wavelength label field; The wavelength conversion table includes: a correspondence between the second wavelength label field and the second wavelength value;

And a fourth acquiring module, configured to acquire, according to the second wavelength value, a second wavelength identifier corresponding to the second wavelength value.

A domain control device is applied to an optical line terminal, including:

a first allocation unit, configured to: when the first optical network unit requests to perform wavelength allocation, assign a first wavelength identifier or a first wavelength value to the first optical network unit according to the request; wherein, the first wavelength The identifier or the first wavelength value is used to identify a wavelength used by the first optical network unit to send an optical signal to the optical line terminal;

a first wavelength label acquiring unit, configured to obtain a first wavelength label according to the first wavelength identifier or a first wavelength value;

The first packet generating unit generates a first packet according to the first wavelength label;

The first packet sending unit is configured to send the first packet to the first port controller.

Preferably, the first wavelength label acquiring unit specifically includes:

a fifth search module, configured to search, according to the first wavelength identifier, a first wavelength conversion table, where the first wavelength conversion table at least includes: a correspondence between the first wavelength identifier and the first wavelength label ;

a fifth acquiring module, configured to acquire a value of the first wavelength label corresponding to the first wavelength identifier; or

a sixth search module, configured to search, according to the first wavelength value, a first wavelength conversion table, where the first wavelength conversion table at least includes: a correspondence between the first wavelength value and the first wavelength label Department

And a sixth acquiring module, configured to acquire a value of the first wavelength label corresponding to the first wavelength value. A wavelength identification system for use in a time division-wavelength division multiplexing passive optical network system, the time division-wavelength division multiplexing passive optical network system comprising: an optical line terminal and an optical network unit, when the optical network unit requests When performing wavelength assignment,

The optical line terminal is configured to acquire, according to the first wavelength label, a first wavelength identifier of the first optical network unit, where the first wavelength identifier is used to identify that the first optical network unit sends an optical signal to the a wavelength used by the optical line terminal; sending a message to the first optical network unit, where the message includes at least: a first wavelength identifier of the first optical network unit;

The optical network unit is configured to receive the text, and send an optical signal to the optical line terminal by using a wavelength identified by the first wavelength identifier.

Preferably, the optical line terminal includes: a domain controller and a first port controller; or the optical line terminal includes: an inter-domain controller and a first port controller,

The first port controller receives the first packet sent by the domain controller or the inter-domain controller, where the first packet includes at least: a first wavelength label, where the first packet is a message used by the domain controller to communicate with the first port controller, or the first message is a message used for communication between the inter-domain controller and the first port controller. Text

The first port controller sends a second packet to the first optical network unit, where the second packet includes: at least: a first wavelength identifier of the first optical network unit; A message used for communication between the first port controller and the first optical network unit.

Preferably, the first packet further includes: a second wavelength label, where the first port controller acquires the first optical network unit according to the second wavelength label field of the first packet And a second wavelength identifier, where the second wavelength identifier is used to identify a wavelength used by the first optical network unit to receive an optical signal sent by the optical line terminal.

Preferably, the first port controller searches the first wavelength conversion table according to the second wavelength label field of the second packet, and acquires a second wavelength identifier corresponding to the second wavelength label field; The first wavelength conversion table includes: a correspondence between the second wavelength label field and the second wavelength identifier; or By,

The first port controller searches the first wavelength conversion table according to the second wavelength label field of the first packet, and obtains a second wavelength value corresponding to the second wavelength label field. The wavelength conversion table includes: a correspondence between the second wavelength label field and the second wavelength value;

The first port controller acquires a second wavelength identifier corresponding to the second wavelength value according to the second wavelength value. In the embodiment of the present invention, when the domain controller or the inter-domain controller sends the first packet to the OLT port controller, the first packet frame structure carries a wavelength label field, and the first packet is received. The OLT port controller is configured to obtain a corresponding wavelength identifier according to the wavelength label field, and then write the wavelength identifier into a second message frame structure sent to the ONU, which is visible through the wavelength in the first message frame structure. The label field may be corresponding to the wavelength identifier used for the second frame structure, so that the first packet is compatible with the wavelength identification method in the second network during transmission.

DRAWINGS

1 is a schematic structural diagram of a TWDM-PON network architecture according to an embodiment of the present invention; FIG. 2 is a schematic flowchart of a wavelength identification method according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a wavelength label carrying a wavelength identifier according to an embodiment of the present disclosure;

4 is a schematic flowchart of another wavelength identification method according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a port control apparatus according to an embodiment of the present disclosure;

6 is a schematic structural diagram of a first wavelength identifier acquiring unit in FIG. 5;

FIG. 7 is a schematic structural diagram of another port control apparatus according to an embodiment of the present disclosure;

8 is a schematic structural diagram of a second wavelength identifier acquiring unit in FIG. 7;

FIG. 9 is a schematic structural diagram of a domain control apparatus according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a first wavelength label acquiring unit in FIG. 9.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the present invention. First, the TWDM-PON is introduced as follows. The TWDM-PON is composed of an OLT on the office side, an ONU on the user side, or an Optical Network Terminal (ONT) and an Optical Distribution Network (ODN). The passive optical network generally adopts a tree topology. The typical TWDM-PON network architecture is shown in Figure 1. The following is an example of the architecture.

The OLT provides a network side interface to the PON system, connecting one or more ODNs. The ODN is a passive optical splitting device for connecting an OLT device and an ONU or Optical Network Terminal (ONT) device for distributing or multiplexing data signals between the OLT and the ONU or ONT. The ONU provides a user-side interface to the PON system and is connected to the ODN. If the ONU directly provides user port functions, such as Ethernet user ports for PC Internet access, it is called ONT. Unless otherwise stated, the ONUs mentioned below refer to ONUs and ONTs. Figure 1 shows an example in which the OLT includes four optical transmitters Txl~Tx4 and four receivers Rxl~Rx4.

In the TWDM-PON system, the OLT to the ONU is called downlink; on the contrary, from the ONU to the OLT is uplink. There are multiple ( > 1 ) wavelengths in the uplink and downlink directions. In Figure 1, there are four wavelengths in the uplink and downlink, which coexist in WDM mode and do not interfere with each other.

In the downlink direction, the four optical transmitters Txl~Tx4 of the OLT broadcast downlink data with optical signals of different wavelengths respectively, and output them to the backbone fiber of the ODN through the wavelength multiplexer/demultiplexer and the WDM coupler, through the ODN. Transmitted to each ONU, the ONU uses a tunable receiver to receive downlink broadcast data signals on one of the downstream wavelengths.

In the upstream direction, the ONU's tunable transmitter uses one of the upstream wavelengths to transmit burst optical signals in TDMA (Time Division Multiple Access), and passes through the ODN backbone fiber to the OLT, via the OLT's WDM coupler. And the wavelength demultiplexer, the optical signals of different wavelengths are respectively received by four different receivers Rxl~Rx4. Each ONU on the same upstream wavelength uses TDMA to transmit data. That is, the OLT allocates time slots to each ONU. Each ONU must send data in strict accordance with the time slot allocated by the OLT to ensure that uplink data does not conflict.

In an actual TWDM-PON network, the possible network topology may be: There is an OLT chassis, and multiple PON ports are on a linecard, and are connected to the ODN through a wavelength multiplexing device. Or, there is an OLT rack and multiple boards, each board has at least one PON port, and multiple PON ports are connected to the ODN through wavelength multiplexing devices; or, there are at least two OLT racks, each Each OLT rack has multiple boards, and each board has at least one PON port. A plurality of PON ports are connected to the ODN through a wavelength multiplexing device.

The OLT board has two ports, one is a network side port, and is connected to an ETH (Ethernet) or IP network or an Asynchronous Transfer Mode (ATM)/Synchronous Digital Hierarchy (SDH) network. The other is the PON port, which is connected to each ONU through the ODN. Different PON ports on the same OLT board can communicate through the internal bus of the OLT board; between different OLT boards on the same OLT rack, they can communicate through the backplane bus of the rack through their network side ports. OLT boards of different OLT racks can communicate through the ETH network connected to the rack or the ATM network of the IP network.

In order to be compatible with the method for identifying wavelengths in different networks, as shown in FIG. 2, an embodiment of the present invention provides a wavelength identification method. The method is applied to a TWDM-PON network, where the TWDM-PON network includes: an OLT and a first ONU, the OLT includes: a domain controller and a first port controller; or the OLT includes: an inter-domain controller and The first port controller, when the first optical network unit requests to perform wavelength allocation, the method specifically includes the following steps:

Step 201: The first port controller receives the first packet sent by the domain controller or the inter-domain controller, where the first packet includes at least: a first wavelength label, where the first packet is Decoding a message used for communication between the domain controller and the first port controller, or the first packet is a message used for communication between the inter-domain controller and the first port controller ;

The physical controller may be a functional module set on the 0LT, and may be a software application module.

The interdomain controller is responsible for coordinating the public activities of the various domain controllers. These public activities include, rogue

0NU analysis and elimination, optical network testing and fault location. The inter-domain controller can be located on the 0LT and has no optical port directly connected to the 0DN. The wavelength management of each domain controller can be implemented. Generally, the inter-domain controller does not directly send network packets to the OLT port controller, and the inter-domain controller sends the network text to the corresponding domain controller, and the domain controller forwards the network text to the corresponding OLT port controller. That is, the first port controller.

The domain controller or the inter-domain controller sends the first packet to the first port controller when the OLT or the network is required to communicate with the network through the ETH or the IP or the ATM or the SDH. The first packet is a wavelength label. The method performs wavelength identification, and carries a wavelength label in the first text.

Step 202: The first port controller acquires according to the first wavelength label of the first packet. a first wavelength identifier of the first optical network unit;

Receiving, by the first port controller, the first packet, the wavelength label field carried in the first packet, and obtaining a corresponding first wavelength identifier according to the wavelength label field, where A wavelength identifier is used to identify a wavelength used by the first optical network unit to transmit an optical signal to the optical line terminal.

Step 203: The first port controller sends a second packet to the first optical network unit, where the second packet includes: at least: a first wavelength identifier of the first optical network unit; The packet is a packet used for communication between the first port controller and the first optical network unit, where the first wavelength identifier is used to identify that the first optical network unit sends an optical signal to the optical line terminal. wavelength.

The first port controller writes the first wavelength identifier into the second packet, and sends the second packet to the first ONU connected to the ODN network. Therefore, the first ONU sends an optical signal to the OLT by using the wavelength identified by the first wavelength identifier.

In the foregoing embodiment, when the domain controller or the inter-domain controller sends the first packet to the OLT port controller, the first packet frame structure carries a wavelength label field, and the first packet is received. The OLT port controller is configured to obtain a corresponding wavelength identifier according to the wavelength label field, and then write the wavelength identifier into a second packet frame structure sent to the ONU, where the wavelength label in the first message frame structure is visible. The field may be corresponding to the wavelength identifier used in the second frame structure, so that the first message is compatible with the wavelength identification method in the second network during the transmission process.

The present invention will be described in detail below in conjunction with the specific embodiments of the invention.

In a preferred embodiment of the present invention, the implementation of the foregoing step 202 may be as follows:

(1) The first port controller searches the first wavelength conversion table according to the first wavelength label of the first packet, and acquires a first wavelength identifier corresponding to the first wavelength label. The wavelength conversion table includes: a correspondence between the first wavelength label and the first wavelength identifier;

Or,

(2) The first port controller searches the first wavelength conversion table according to the first wavelength label of the first packet, and obtains a first wavelength value corresponding to the wavelength label; wherein, the first wavelength The conversion table includes: a correspondence between the first wavelength label and the first wavelength value; The first port controller acquires a first wavelength identifier corresponding to the first wavelength value according to the first wavelength value.

In this embodiment, the first port controller is preset with a first wavelength conversion table. As shown in the following Table 1, the first wavelength conversion table may include: a correspondence between the first wavelength label and the first wavelength identifier. Or a correspondence between the first wavelength label and the first wavelength value.

Therefore, the first port controller may directly acquire the first wavelength identifier corresponding to the first wavelength label according to the correspondence between the first wavelength label and the first wavelength label; or, according to the first wavelength label and the first Corresponding relationship between the wavelength values first acquires a first wavelength value corresponding to the wavelength label, and further acquires a first wavelength identifier corresponding to the first wavelength value.

Table 1 First wavelength conversion table

The value of the wavelength label can be determined according to the values of the Grid, Channel Spacing and n subfields in the wavelength label field. The wavelength value can be expressed by the THZ frequency or by the nanometer. among them,

The Grid subfield indicates the ITU-T grid definition followed by the wavelength described by the wavelength label, such as a value of 1 indicating an ITU-T DWDM grid and a value of 2 indicating an ITU-T CWDM grid;

The Channel Spacing subfield indicates the interval between the wavelength described by the wavelength label and other wavelengths. When the value of the Grid subfield is 1, the value of the Channel Spacing subfield is 1 indicating that the channel spacing is 100 GHz, and the value of the Channel Spacing subfield is 2. Indicates that the channel spacing is 50 GHz, the value of the Channel Spacing subfield is 5, and the channel spacing is 200 GHz. When the value of the Grid subfield is 2, the value of the Channel Spacing subfield is 1 to indicate that the channel P鬲 is 20 匪;

The n subfield represents a two's complement integer (including a positive integer, a negative integer, or 0).

According to the following formula, the wavelength and frequency of the corresponding wavelength division multiplexer working center can be obtained: According to the wavelength (nm) = 1471nm + n ^x channel spacing (1) When Grid = 2, Channel Spacing = 1, n = -7, the wavelength indicated by the wavelength label is ITU-T CWDM wavelength, wavelength = 1471 ( Nm ) + ( -7 ) 20 ( nm ) = 1331 nm;

According to the frequency (THz) = 193.1THz + n xchannel spacing (2)

When Grid = 1, Channel Spacing = 2, n = 5, the wavelength indicated by the wavelength label is ITU-T

DWDM wavelength, generally expressed in frequency (frequency and wavelength can be converted to each other), frequency =193.1 THz +5 50GHz = 193.35THz

After the domain controller or the inter-domain controller obtains the wavelength label value, according to the wavelength mapping relationship, a corresponding wavelength ID value can be obtained. The wavelength ID value is pre-written in the reserved subfield in the wavelength label field in the form of a wavelength information field. As shown in FIG. 3, it is a schematic diagram of a wavelength label field carrying a wavelength information field.

In Figure 3, the Reserved Subfield of the Wavelength Label field is divided into the following three subfields: Direction, Reserved, and wavelength ID.

The Direction sub-field includes 1 bit, which is used to identify whether the wavelength represented by the wavelength label is an upstream wavelength or a downlink wavelength. In specific implementation, Direction=0 can be set to indicate that the wavelength is a downlink wavelength; Direction=l , The wavelength is the upstream wavelength;

The Reserved subfield contains (8z) bits, which can be filled with 0, and the receiving end does not process; the wavelength ID (wavelength identification) subfield includes z bits (z > 1), and the wavelength corresponding to the wavelength label field is set. Information field.

In this implementation manner, the first packet sent by the domain controller or the inter-domain controller actually carries the wavelength label field and the wavelength information field at the same time.

The first port controller that receives the first packet can directly extract the corresponding wavelength identifier preset in the reserved subfield by identifying the reserved subfield in the wavelength label field, and obtain corresponding wavelength information.

In another embodiment of the present invention, the first packet may further include: a second wavelength label, where the first port controller may obtain according to the second wavelength label field of the first packet. a second wavelength identifier of the first optical network unit, where the second wavelength identifier is used to identify a wavelength used by the first optical network unit to receive an optical signal sent by the optical line terminal.

Further, the second packet may further include: a second wavelength label of the first optical network unit Knowledge.

In this embodiment, the first port controller acquires the second wavelength identifier of the first optical network unit according to the second wavelength label field of the first packet, and the implementation includes the following two manners:

(1) The first port controller searches the first wavelength conversion table according to the second wavelength label field of the second packet, and obtains a second wavelength identifier corresponding to the second wavelength label field; The first wavelength conversion table includes: a correspondence between the second wavelength label field and the second wavelength identifier; or

(2) the first port controller searches the first wavelength conversion table according to the second wavelength label field of the first packet, and obtains a second wavelength value corresponding to the second wavelength label field; The first wavelength conversion table includes: a correspondence between a second wavelength label field and a second wavelength value;

The first port controller acquires a second wavelength identifier corresponding to the second wavelength value according to the second wavelength value. Corresponding to the above wavelength identification method, in another embodiment of the present invention, the wavelength identification method is described from a domain controller or an inter-domain controller side, and the method is also applied in a time division-wavelength division multiplexing passive optical network system. The time-division-wavelength-multiplexed passive optical network system includes: an optical line terminal and an optical network unit, where the optical line terminal includes: a domain controller and a first port controller; or, the optical line terminal includes: The inter-controller and the first port controller, as shown in FIG. 4, the method includes:

Step 401: When the first optical network unit requests to perform wavelength allocation, the domain controller or the inter-domain controller allocates a first wavelength identifier or first to the first optical network unit according to the request. a wavelength value; wherein the first wavelength identifier or the first wavelength value is used to identify a wavelength used by the first optical network unit to transmit an optical signal to the optical line terminal;

Step 402: The domain controller or the inter-domain controller acquires a first wavelength label according to the first wavelength identifier or a first wavelength value.

Step 403: The domain controller or the inter-domain controller generates a first packet according to the first wavelength label.

Step 404: The domain controller or the inter-domain controller sends the first packet to the first port controller.

In this embodiment, when the domain controller or the inter-domain controller sends the first packet to the OLT port controller, The first packet frame structure carries a wavelength label field, and the OLT port controller that receives the first packet can obtain a corresponding wavelength identifier according to the wavelength label field, and then write the wavelength identifier. In the second packet frame structure sent to the ONU, it can be seen that the wavelength label of the second message frame structure can be correspondingly obtained by using the wavelength label field in the first message frame structure, so that the first packet is in the transmission process. It is compatible with the identification method of the wavelength in the second network.

It is to be noted that, the domain controller or the inter-domain controller acquires the first wavelength label according to the first wavelength identifier or the first wavelength value, and specifically includes:

Determining, by the domain controller or the inter-domain controller, the first wavelength conversion table according to the first wavelength identifier or the first wavelength value, and acquiring the first wavelength identifier or the first wavelength value a value of a wavelength label; wherein, the first wavelength conversion table at least includes: a correspondence between the first wavelength identifier and the first wavelength label; or the first wavelength conversion table at least: A correspondence between a wavelength value and the first wavelength label.

In the embodiment of the present invention, the first wavelength label is pre-written in the first packet by the domain controller or the inter-domain controller according to the preset.

The wavelength label includes at least the following fields: Grid, channel and n.

The domain controller or the inter-domain controller is preset with a first wavelength conversion table as shown in Table 1, and the domain controller or the inter-domain controller may search for the first wavelength identifier or the first wavelength value. And a wavelength conversion table, acquiring a value of the first wavelength label corresponding to the first wavelength identifier or the first wavelength value. The wavelength tag value can be determined by carrying values based on the Grid, Channel Spacing, and n subfields in the Wavelength Label field. The sub-fields of the wavelength label have been described in detail above, and will not be described here. Corresponding to the foregoing method embodiments, the present invention further provides a port control device, which is applied to an optical line terminal, as shown in FIG. 5, and specifically includes:

The first packet receiving unit 501 is configured to: when the optical network unit requests to perform wavelength allocation, receive the first packet sent by the domain controller or the inter-domain controller, where the first packet is controlled by the domain The first packet includes: a first wavelength label; the first wavelength identifier acquiring unit 502, configured to use, according to the first wavelength label of the first packet, the packet used by the device or the inter-domain controller. Obtaining a first wavelength identifier of the optical network unit; a second packet sending unit 503, configured to send a second packet to the optical network unit, where the second packet includes: at least: a first wavelength identifier of the optical network unit; a packet used for communication between the optical network units, where the first wavelength identifier is used to identify a wavelength used by the optical network unit to transmit an optical signal.

The port control device provided by the device embodiment receives the first packet sent by the domain controller or the inter-domain controller, where the first packet frame structure carries a wavelength label field, which can be obtained according to the wavelength label field. Corresponding wavelength identifier, and then the wavelength identifier is written into the second message frame structure sent to the ONU, and the frame label structure in the first message frame structure can be correspondingly obtained for the second message frame structure. The wavelength identifier is such that the first message is compatible with the wavelength identification method in the second network during transmission.

In a preferred apparatus embodiment of the present invention, as shown in FIG. 6, the first wavelength identifier acquiring unit 502 specifically includes:

The first search module 601 is configured to: search, according to the first wavelength label of the first packet, the first wavelength conversion table, where the first wavelength conversion table includes: corresponding to the first wavelength label and the first wavelength identifier Relationship

The first obtaining module 602 is configured to acquire a first wavelength identifier corresponding to the first wavelength label; or

The second search module 603 is configured to: search the first wavelength conversion table according to the first wavelength label of the first packet, and obtain a first wavelength value corresponding to the wavelength label; wherein, the first wavelength conversion table The method includes: a correspondence between a first wavelength label and a first wavelength value;

The second obtaining module 604 is configured to obtain, according to the first wavelength value, a first wavelength identifier corresponding to the first wavelength value.

In another preferred embodiment, the first packet further includes: a second wavelength label, and as shown in FIG. 7, the apparatus further includes:

The second wavelength identifier obtaining unit 504 is configured to obtain the second wavelength identifier of the first optical network unit according to the second wavelength label field of the first packet.

The second message sending unit is further configured to:

In a specific implementation, as shown in FIG. 8, the second wavelength identifier acquiring unit 504 specifically includes: a third searching module 801, configured to search for a first wavelength conversion according to a second wavelength label field of the second packet The first wavelength conversion table includes: a correspondence between a second wavelength label field and a second wavelength identifier;

a third obtaining module 802, configured to acquire a second wavelength identifier corresponding to the second wavelength label field;

Or,

The fourth search module 803 is configured to search the first wavelength conversion table according to the second wavelength label field of the first packet, and obtain a second wavelength value corresponding to the second wavelength label field. The wavelength conversion table includes: a correspondence between the second wavelength label field and the second wavelength value;

The fourth obtaining module 804 is configured to obtain, according to the second wavelength value, a second wavelength identifier corresponding to the second wavelength value. Corresponding to the above port control device, the present invention further provides a domain control device, which is applied to an optical line terminal, as shown in FIG. 9, and includes:

a first allocation unit 901, configured to allocate, according to the request, a first wavelength identifier or a first wavelength value according to the request, when the first optical network unit requests to perform wavelength allocation, where the first The wavelength identifier or the first wavelength value is used to identify a wavelength used by the first optical network unit to send an optical signal to the optical line terminal;

The first wavelength label obtaining unit 902 is configured to acquire the first wavelength label according to the first wavelength identifier or the first wavelength value;

The first packet generating unit 903 generates a first packet according to the first wavelength label, and the first packet sending unit 904 is configured to send the first packet to the first port controller. When the first packet is sent to the OLT port controller, the domain control device of the present invention carries a wavelength label field in the first packet frame structure, and the OLT port controller that receives the first packet can Obtaining a corresponding wavelength identifier according to the wavelength label field, and then writing the wavelength identifier to a second packet frame structure sent to the ONU, where the wavelength label field in the first message frame structure can be correspondingly obtained. The wavelength identifier used in the frame structure of the second packet, so that the first packet is transmitted. The process is compatible with the identification method of the wavelength in the second network.

In a preferred embodiment, as shown in FIG. 10, the first wavelength label acquiring unit 902 includes:

The fifth search module 1001 is configured to: search the first wavelength conversion table according to the first wavelength identifier, where the first wavelength conversion table at least includes: corresponding to the first wavelength identifier and the first wavelength label Relationship

The fifth obtaining module 1002 is configured to acquire a value of the first wavelength label corresponding to the first wavelength identifier; or

The sixth search module 1003 is configured to: search the first wavelength conversion table according to the first wavelength value, where the first wavelength conversion table at least includes: corresponding to the first wavelength value and the first wavelength label Relationship

The sixth obtaining module 1004 is configured to obtain a value of the first wavelength label corresponding to the first wavelength value. Correspondingly, the present invention further provides a wavelength identification system for use in a time division-wavelength division multiplexing passive optical network system, wherein the time division-wavelength division multiplexing passive optical network system comprises: an optical line terminal and an optical network unit When the optical network unit requests wavelength assignment,

Specifically, the optical line terminal includes: a domain controller and a first port controller; or, the optical line terminal includes: an inter-domain controller and a first port controller;

The first port controller receives the first packet sent by the domain controller or the inter-domain controller, where the first text includes at least: a first wavelength label, where the first text is the a message used for communication between the domain controller and the first port controller, or the first packet is a message used for communication between the inter-domain controller and the first port controller; Obtaining, by the first port controller, the first wavelength identifier of the first optical network unit according to the first wavelength label of the first packet;

In addition, the first packet further includes: a second wavelength label, where the first port controller acquires the second optical network unit according to the second wavelength label field of the first packet a wavelength identifier, where the second wavelength identifier is used to identify a wavelength used by the first optical network unit to receive an optical signal sent by the optical line terminal.

It is to be noted that, the first port controller searches the first wavelength conversion table according to the second wavelength label field of the second packet, and acquires a second wavelength identifier corresponding to the second wavelength label field; The first wavelength conversion table includes: a correspondence between a second wavelength label field and a second wavelength identifier;

Or the first port controller searches the first wavelength conversion table according to the second wavelength label field of the first packet, and obtains a second wavelength value corresponding to the second wavelength label field; The first wavelength conversion table includes: a correspondence between the second wavelength label field and the second wavelength value; the first port controller acquires a second wavelength identifier corresponding to the second wavelength value according to the second wavelength value . The apparatus and system embodiments described above are merely illustrative, wherein the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, ie It can be located in one place, or it can be distributed to multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the embodiment scheme. Those of ordinary skill in the art can understand and implement without any creative effort.

The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the embodiments of the invention. . Therefore, embodiments of the invention will not be limited to the one shown herein The embodiments are to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

Rights request

1. A wavelength identification method applied in a time division-wavelength division multiplexing passive optical network system. The time division-wavelength division multiplexing passive optical network system includes: an optical line terminal and a first optical network unit, the The optical line terminal includes: a domain controller and a first port controller; or, the optical line terminal includes: an inter-domain controller and a first port controller, characterized in that the method includes:

When the first optical network unit requests wavelength allocation, the first port controller receives a first message sent by a domain controller or an inter-domain controller, where the first message at least includes: a first wavelength label. ; wherein, the first message is a message used for communication between the domain controller and the first port controller, or, the first message is a message used for communication between the inter-domain controller and the third port controller. Messages used for communication between one-port controllers;

The first port controller obtains the first wavelength identifier of the first optical network unit according to the first wavelength label of the first message;

The first port controller sends a second message to the first optical network unit, where the second message at least includes: a first wavelength identifier of the first optical network unit; the second message is A message used for communication between the first port controller and the first optical network unit. The first wavelength identifier is used to identify the wavelength used by the first optical network unit to send an optical signal to the optical line terminal.

2. The method according to claim 1, characterized in that, the first port controller obtains the first wavelength identification of the first optical network unit according to the first wavelength label of the first document, specifically including: :

The first port controller searches a first wavelength conversion table according to the first wavelength label of the first message, and obtains the first wavelength identifier corresponding to the first wavelength label; wherein, the first wavelength conversion The table includes: the corresponding relationship between the first wavelength label and the first wavelength identification; or,

The first port controller searches a first wavelength conversion table according to the first wavelength label of the first message, and obtains the first wavelength value corresponding to the wavelength label; wherein, the first wavelength conversion table includes : The corresponding relationship between the first wavelength label and the first wavelength value;

The first port controller obtains a first wavelength identifier corresponding to the first wavelength value according to the first wavelength value.

3. The method according to claim 1, characterized in that the first message further includes at least: a second wavelength label.

4. The method according to claim 3, characterized in that, the method further includes: the first port controller obtains the first optical network unit according to the second wavelength label field of the first message. The second wavelength identifier is used to identify the wavelength used by the first optical network unit to receive the optical signal sent by the optical line terminal.

5. The method according to claim 3 or 4, characterized in that the second message further includes at least: a second wavelength identifier of the first optical network unit.

6. The method according to claim 4, characterized in that, the first port controller obtains the second wavelength identifier of the first optical network unit according to the second wavelength label field of the first message, Specifically include:

The first port controller searches the first wavelength conversion table according to the second wavelength label field of the second message, and obtains the second wavelength identifier corresponding to the second wavelength label field; wherein, the first The wavelength conversion table includes: a correspondence relationship between the second wavelength label field and the second wavelength identifier; or, the first port controller searches the first wavelength conversion table according to the second wavelength label field of the first message, and obtains a second wavelength value corresponding to the second wavelength tag field; wherein, the first wavelength conversion table includes: a correspondence relationship between the second wavelength tag field and the second wavelength value;

The first port controller obtains a second wavelength identifier corresponding to the second wavelength value according to the second wavelength value.

7. A wavelength identification method applied in a time division-wavelength division multiplexing passive optical network system. The time division-wavelength division multiplexing passive optical network system includes: an optical line terminal and an optical network unit, and the optical line terminal It includes: a domain controller and a first port controller; or, the optical line terminal includes: an inter-domain controller and a first port controller, characterized in that the method includes:

When the first optical network unit requests wavelength allocation, the domain controller or the inter-domain controller allocates a first wavelength identifier or a first wavelength value to the first optical network unit according to the request; Wherein, the first wavelength identifier or first wavelength value is used to identify the wavelength used by the first optical network unit to send optical signals to the optical line terminal;

The domain controller or the inter-domain controller obtains the first wavelength label according to the first wavelength identifier or the first wavelength value;

The domain controller or the inter-domain controller generates a first message according to the first wavelength label; The domain controller or the inter-domain controller sends the first message to the first port controller.

8. The method according to claim 7, characterized in that the domain controller or the inter-domain controller obtains the first wavelength label according to the first wavelength identifier or the first wavelength value, specifically including:

The domain controller or the inter-domain controller searches a first wavelength conversion table according to the first wavelength identification or the first wavelength value, and obtains the first wavelength conversion table corresponding to the first wavelength identification or the first wavelength value. The value of a wavelength label; wherein, the first wavelength conversion table at least includes: the corresponding relationship between the first wavelength identifier and the first wavelength label; or, the first wavelength conversion table at least includes: the first wavelength conversion table. A corresponding relationship between a wavelength value and the first wavelength label.

9. The method according to claim 7, characterized in that the wavelength label includes at least the following fields: Grid, channel and ri.

10. A port control device applied to an optical line terminal, characterized in that it includes: a first message receiving unit, configured to receive a packet sent by a domain controller or an inter-domain controller when the optical network unit requests wavelength allocation. The first message, wherein the first message is a message used for communication with the domain controller or an inter-domain controller, the first message at least includes: a first wavelength label; a first wavelength An identification acquisition unit, configured to obtain the first wavelength identification of the optical network unit according to the first wavelength label of the first message;

A second message sending unit, configured to send a second message to the optical network unit. The second message at least includes: the first wavelength identifier of the optical network unit; the second message is related to the optical network unit. In the message used for communication between the optical network units, the first wavelength identifier is used to identify the wavelength used by the optical network unit to send optical signals.

11. The device according to claim 10, characterized in that the first wavelength identification acquisition unit specifically includes:

The first search module is configured to search the first wavelength conversion table according to the first wavelength label of the first message, wherein the first wavelength conversion table includes: the corresponding relationship between the first wavelength label and the first wavelength identification. ;

A first acquisition module, configured to acquire the first wavelength identifier corresponding to the first wavelength tag; or,

The second search module is configured to search the first wavelength conversion table according to the first wavelength label of the first message, and obtain the first wavelength value corresponding to the wavelength label; wherein, the first wavelength conversion table includes : The corresponding relationship between the first wavelength label and the first wavelength value;

The second acquisition module is configured to acquire the first wavelength identifier corresponding to the first wavelength value according to the first wavelength value.

12. The device according to claim 10, wherein the first message further includes at least: a second wavelength label, then the device further includes:

The second wavelength identification obtaining unit is configured to obtain the second wavelength identification of the first optical network unit according to the second wavelength label field of the first message.

13. The device according to claim 12, characterized in that the second message sending unit is also used to:

The second message at least further includes: a second wavelength identifier of the first optical network unit, where the second wavelength identifier is used to identify that the first optical network unit receives the optical signal sent by the optical line terminal. The wavelength used by the signal,

14. The device according to claim 12, characterized in that the second wavelength identification acquisition unit specifically includes:

The third search module is configured to search the first wavelength conversion table according to the second wavelength label field of the second message, wherein the first wavelength conversion table includes: the second wavelength label field and the second wavelength identification. Correspondence;

A third acquisition module, configured to acquire the second wavelength identifier corresponding to the second wavelength tag field; or,

The fourth search module is configured to search the first wavelength conversion table according to the second wavelength label field of the first message, and obtain the second wavelength value corresponding to the second wavelength label field; wherein, the first The wavelength conversion table includes: the corresponding relationship between the second wavelength label field and the second wavelength value;

A fourth acquisition module, configured to acquire a second wavelength identifier corresponding to the second wavelength value according to the second wavelength value.

15. A domain control device, applied to optical line terminals, characterized in that it includes: a first allocation unit, configured to perform wavelength allocation according to the request when the first optical network unit requests wavelength allocation. To find, allocate a first wavelength identifier or a first wavelength value to the first optical network unit; wherein, the first wavelength identifier or first wavelength value is used to identify the first optical network unit to send an optical signal to the The wavelength used by the optical line terminal;

A first wavelength label acquisition unit, configured to obtain a first wavelength label according to the first wavelength identifier or first wavelength value;

The first message generating unit generates a first message according to the first wavelength label;

The first message sending unit is used to send the first message to the first port controller.

16. The device according to claim 15, characterized in that the first wavelength tag acquisition unit specifically includes:

A fifth search module, configured to search a first wavelength conversion table according to the first wavelength identifier, wherein the first wavelength conversion table at least includes: the corresponding relationship between the first wavelength identifier and the first wavelength label. ;

A fifth acquisition module, configured to acquire the value of the first wavelength tag corresponding to the first wavelength identifier; or,

A sixth search module, configured to search a first wavelength conversion table according to the first wavelength value, wherein the first wavelength conversion table at least includes: the corresponding relationship between the first wavelength value and the first wavelength tag. ;

A sixth acquisition module, configured to acquire the value of the first wavelength tag corresponding to the first wavelength value.

17. A wavelength identification system applied in a time division-wavelength division multiplexing passive optical network system, characterized in that the time division-wavelength division multiplexing passive optical network system includes: an optical line terminal and an optical network unit, when When the optical network unit requests wavelength allocation,

The optical line terminal is configured to obtain the first wavelength identifier of the first optical network unit according to the first wavelength label, and the first wavelength identifier is used to identify the first optical network unit to send an optical signal to the The wavelength used by the optical line terminal; sending a message to the first optical network unit, where the message at least includes: the first wavelength identifier of the first optical network unit;

The optical network unit is configured to receive the message and send an optical signal to the optical line terminal using the wavelength identified by the first wavelength identifier.

18. The system according to claim 17, characterized in that, the optical line terminal includes: a domain controller and a first port controller; or, the optical line terminal includes: an inter-domain controller and a first port controller. port controller,

The first port controller receives the first message sent by the domain controller or the inter-domain controller, wherein the first message at least includes: a first wavelength label; wherein the first message is the A message used for communication between a domain controller and the first port controller, or, the first message is a message used for communication between the inter-domain controller and the first port controller;

The first port controller sends a second message to the first optical network unit, where the second message at least includes: a first wavelength identifier of the first optical network unit; the second message is A message used for communication between the first port controller and the first optical network unit.

19. The system according to claim 18, characterized in that, the first message further includes at least: a second wavelength label, then the first port controller adjusts the signal according to the second wavelength label of the first message. field, obtain the second wavelength identifier of the first optical network unit, where the second wavelength identifier is used to identify the wavelength used by the first optical network unit to receive the optical signal sent by the optical line terminal.

20. The system according to claim 19, characterized in that, the first port controller searches the first wavelength conversion table according to the second wavelength label field of the second message, and obtains the data corresponding to the second wavelength. The second wavelength identification corresponding to the label field; wherein, the first wavelength conversion table includes: the corresponding relationship between the second wavelength label field and the second wavelength identification; or,

The first port controller searches the first wavelength conversion table according to the second wavelength label field of the first message, and obtains the second wavelength value corresponding to the second wavelength label field; wherein, the first The wavelength conversion table includes: the corresponding relationship between the second wavelength label field and the second wavelength value;