WO2022130567A1

WO2022130567A1 - Communication device and communication method

Info

Publication number: WO2022130567A1
Application number: PCT/JP2020/047155
Authority: WO
Inventors: 宏大岩
Original assignee: 日本電信電話株式会社
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2022-06-23
Also published as: JPWO2022130567A1

Abstract

This communication device comprises: a first function unit which acquires communication data, and operates on the basis of first setting information included in the acquired communication data and a first list which is a list including a plurality of pieces of the first setting information; and a second function unit which acquires, from the first function unit, information based on the first setting information included in the communication data, and operates on the basis of the acquired information and a second list which is a list including a plurality of pieces of second setting information and in which a pointer pointing at an address of the first list is associated with each piece of the second setting information.

Description

Communication device and communication method

The present invention relates to a communication device and a communication method.

The need for high-speed access services is increasing, and optical broadband services are becoming widespread worldwide. In optical broadband services, an economical optical fiber communication system called a PON (Passive Optical Network) system is widely used. In the PON system, the OLT (Optical Line Terminal) located in the communication station building and the ONU (Optical Network Unit) located in each user's home are one-to-multipoint (Point-to-MultiPoint) via an optical splitter. Communicate.

The currently widely introduced PON system employs a time division multiple access (TDMA) method in which each ONU accesses the OLT in different time slots. As a result, a PON system having a total transmission capacity of 1 Gbit / s class and 10 Gbit / s class is realized. Such a PON system having a total transmission capacity of 1 Gbit / s class and 10 Gbit / s class is GE (GigabitEthernet) -PON and 10G-E in the IEEE (Institute of Electrical and Electronics Engineers), which is a technical standardization organization. (10Gigabit-Ethernet) Standardized as PON.

In ITU-T (International Telecommunication Union-Telecommunication Standardization Sector), G (Gigabit-capable) -PON, XG (10Gigabit-capable) -PON, and XGS (10Gigabit-capable Symmetric) -PON are standardized. Furthermore, in the ITU-T, a 40 Gbit / s class PON system (NG-PON2 :) that employs a TWDM (Time and Wavelength Division Multiplexing) -PON method that combines TDMA with wavelength division multiplexing (WDM) technology. Next Generation-PON2) has been standardized.

For example, GE-PON is a high-speed optical access method standardized in IEEE802.3ah. In IEEE802.3ah, only the communication control method between the OLT and the ONU, the maintenance and monitoring interface, and the like are specified. However, when actually making a communication device (for example, OLT and ONU) that conforms to this standard, for example, how to interface with the operator who maintains and operates the device, how to open the ONU, etc. There are a number of issues to consider. In order to solve these problems, it is necessary to install some functions in the communication device. For example, the functions installed in the OLT include maintenance function, ONU authentication function, bridge function, encryption function, DBA function (bandwidth control, delay control), PON interface function, SNI (Server Name Indication) port function, etc. ( See Non-Patent Document 1).

As mentioned above, communication devices such as OLT have multiple functional units. Each functional unit is composed of semiconductor components such as an ASIC (Application Specific Integrated Circuit). Therefore, each functional unit needs to make settings necessary for operation by using the memory or the register provided in the semiconductor component constituting its own functional unit. Conventionally, the setting method performed in each functional unit is not designed on the premise that the setting contents are matched among a plurality of functional units. Therefore, in order to match the setting contents among a plurality of functional parts, it is necessary for the user to associate the setting contents between the functional parts in advance. As described above, conventionally, there has been a problem that the user has to perform complicated work in order to manage the consistency of the setting contents among the plurality of functional units.

In view of the above circumstances, it is an object of the present invention to provide a technique capable of easily matching the setting contents among a plurality of functional units of a communication device.

One aspect of the present invention operates based on a first setting information obtained by acquiring communication data and included in the acquired communication data, and a first list which is a list including a plurality of the first setting information. Information based on the first setting information included in the communication data is acquired from the first function unit and the first function unit, and the acquired information and a list including a plurality of second setting information are described above. It is a communication device including a second list, which is the list in which a pointer pointing to an address of one list is associated with each second setting information, and a second functional unit that operates based on the second list.

One aspect of the present invention includes a plurality of functional units each holding a list for storing a plurality of set values, and the list held by each functional unit sets setting values associated with different functional units line by line. The list held by the second function unit, which is a communication device for storing and receives communication data from the first function unit, has a pointer in which each line points to a line of the list held by the first function unit. Based on the communication data received from the first function unit, the second function unit searches for a set value included in the list held by the first function unit via a pointer, and the searched first function unit searches for the set value. It is a communication device that specifies the set value of the self-functioning unit corresponding to the set value of.

One aspect of the present invention operates based on a first setting information obtained by acquiring communication data and included in the acquired communication data, and a first list which is a list including a plurality of the first setting information. A pointer that acquires information based on the first step and the first setting information included in the communication data, and points to the address of the first list, which is a list including the acquired information and a plurality of second setting information. Is a communication method having a second list, which is the list associated with each second setting information, and a second step that operates based on the second list.

According to the present invention, it is possible to easily match the setting contents among a plurality of functional units of the communication device.

It is a block diagram which shows the functional structure of the PON system 5 which uses the list between functional parts. It is a schematic diagram which shows an example of the structure of the ONU identifier list T5. It is a schematic diagram which shows an example of the structure of the line identifier list T6. It is a schematic diagram which shows an example of the structure of the list T7 between functional parts. It is a flowchart which shows the operation of the OLT500 which uses the list between functional parts. It is a block diagram which shows the functional structure of the PON system 1 in embodiment of this invention. It is a schematic diagram which shows an example of the structure of the ONU identifier list T1 in embodiment of this invention. It is a schematic diagram which shows an example of the structure of the line identifier list T2 in embodiment of this invention. It is a flowchart which shows the operation of the OLT 100 in embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
For example, in optical broadband services such as IP telephones and video conference systems, it is necessary to avoid communication connections with unintended parties from the viewpoint of preventing erroneous charges and protecting personal information.

In the PON system, an identifier (hereinafter referred to as "ONU identifier") is assigned to the ONU on the user side of the OLT in order to identify the user, and an identifier (hereinafter referred to as "line identifier") is assigned to the communication network on the higher side than the OLT. ) Is given. The ONU identifier is, for example, a MAC (Media Access Control) address or a logical link identifier (LLID: Logical Link Identifier). The line identifier is, for example, a virtual local area network identifier (VID: VirtualLocalAreaNetworkIdentifier).

In the PON system, the ONU identifies the user using the ONU identifier. Further, the device higher than the OLT (hereinafter referred to as "upper device") identifies the user by using the line identifier. The OLT mutually converts the ONU identifier and the line identifier assigned to the frame. When there are a plurality of higher-level devices, the OLT may identify the user by using the connection port number and the line identifier with the higher-level device. That is, even if the line identifiers are the same, if the connection port numbers are different, the OLT may recognize that they are different users.

OLT has multiple functional parts. Each functional unit is composed of a semiconductor component such as an ASIC. Therefore, each functional unit needs to make settings necessary for operation by using the memory or the register provided in the semiconductor component constituting its own functional unit. Further, for the settings made in each functional unit, it may be necessary to associate the setting contents between the functional units. For example, as an association of setting contents between functional units, there is an association between the above-mentioned ONU identifier and a line identifier.

Hereinafter, an example of the configuration of the PON system in the case of associating the setting contents between the functional parts by using the list between the functional parts will be described.
FIG. 1 is a block diagram showing a functional configuration of a PON system 5 using a list between functional units. As shown in FIG. 1, the PON system 5 includes an OLT 500, a plurality of OLT 200s, and an optical fiber transmission line 300. The PON system 5 has a configuration in which a single-core optical fiber is shared by a plurality of subscribers. Therefore, the PON system 5 makes it possible to improve the line usage efficiency and reduce the physical cost.

The OLT 100 is an optical subscriber line end station device installed on the communication station building side. The OLT 500 is connected to the upper communication network and the optical fiber transmission line 300.
The ONU 200 is an optical subscriber line termination device installed on each user's home side. The ONU 200 is connected to an optical fiber transmission line 300 and a terminal device (not shown). The terminal device is, for example, a personal computer or a router installed in each user's home.
The optical fiber transmission line 300 connects the OLT 500 and a plurality of OLT 200 by one-to-many (Point to Multi-Point) communication. The optical fiber transmission line 300 includes optical combined demultiplexing means 301. The optical duplexing means 301 is, for example, an optical splitter.

As shown in FIG. 1, the OLT 500 includes a PON functional unit 510, a concentrating unit 520, and an inter-functional list storage unit 530. The PON function unit 510 and the concentrator unit 520 are each composed of individual semiconductor components.

The PON function unit 510 terminates, for example, an IEEE802.3 compliant MPCP (Multi-Point Control Protocol) / OAM (Operation, Administration and Maintenance).
The concentrator 520 aggregates and forwards traffic from a plurality of PON ports (not shown).

As shown in FIG. 1, the PON function unit 510 includes a frame receiving unit 511, an identifier conversion unit 512, and an ONU identifier list storage unit 513.

The frame receiving unit 511 receives an uplink frame from each ONU200. The uplink frame contains an ONU identifier that identifies the ONU 200. The frame receiving unit 511 transfers the received uplink frame to the identifier conversion unit 512.

The identifier conversion unit 512 acquires an uplink frame from the frame receiving unit 511. The identifier conversion unit 512 reads the ONU identifier included in the uplink. The identifier conversion unit 512 refers to the ONU identifier list T5 stored in the ONU identifier list storage unit 513. The identifier conversion unit 512 identifies the first internal identifier corresponding to the read ONU identifier based on the ONU identifier list T5. The identifier conversion unit 512 deletes the ONU identifier included in the uplink frame and assigns the specified first internal identifier to the uplink frame. The identifier conversion unit 512 outputs the uplink frame to which the first internal identifier is given to the concentrating unit 520.

The ONU identifier list storage unit 513 stores the ONU identifier list T5. The ONU identifier list T5 is a list in which the ONU identifier and the first internal identifier are associated with each other. The ONU identifier list T5 is generated by a user, for example, and is recorded in advance in the ONU identifier list storage unit 513. The first internal identifier is preset by the user, for example, so as to be unique for each ONU identifier. The ONU identifier list storage unit 513 is configured to include a memory or a register included in a semiconductor component such as an ASIC.

As shown in FIG. 1, the concentrating unit 520 includes a frame receiving unit 521, an identifier conversion unit 522, and a line identifier list storage unit 523.

The frame receiving unit 521 receives an uplink frame from the identifier conversion unit 512 of the PON function unit 510. The uplink frame contains a first internal identifier assigned by the identifier conversion unit 512. The frame receiving unit 521 transfers the received uplink frame to the identifier conversion unit 522.

The identifier conversion unit 522 acquires an uplink frame from the frame reception unit 521. The identifier conversion unit 522 reads out the first internal identifier included in the uplink frame. The identifier conversion unit 522 refers to the inter-functional list T7 stored in the inter-functional list storage unit 530. The identifier conversion unit 522 identifies the line identifier corresponding to the read first internal identifier based on the inter-functional list T7. The identifier conversion unit 512 deletes the first internal identifier included in the uplink and assigns the specified line identifier to the uplink. The identifier conversion unit 522 outputs an uplink frame to which a line identifier is assigned to a higher-level device (not shown) via a higher-level communication network.

The line identifier list storage unit 523 stores the line identifier list T6. The line identifier list T6 is a list in which the line identifier and the second internal identifier are associated with each other. The line identifier list T6 is generated by a user, for example, and is recorded in advance in the line identifier list storage unit 523. The second internal identifier is preset by the user, for example, so as to be unique for each line identifier. The line identifier list storage unit 523 includes a memory or a register included in a semiconductor component such as an ASIC.

The inter-functional list storage unit 530 stores the inter-functional list T7. The inter-functional list T7 is a list in which at least a line identifier and a first internal identifier are associated with each other. The inter-functional list T7 may be a list in which the ONU identifier and the second internal identifier are further associated with each other. The inter-functional list T7 is generated by, for example, a user associating at least a line identifier with a first internal identifier based on the ONU identifier list T5 and the line identifier list T6. The inter-functional list storage unit 530 is configured to include a memory or a register included in a semiconductor component such as an ASIC.

In this way, when associating the setting contents between the functional units using the inter-functional unit list T7, for example, it is necessary for the user to perform the processing of the association between the different identifiers in advance. Further, in this case, in addition to the ONU identifier list T5 and the line identifier list T6, a storage capacity of a memory or a register for storing the functional unit list T7 generated for associating both lists is required.

Hereinafter, a case where the setting contents are associated between the functional units using the inter-functional unit list T7 will be described with a specific example.

FIG. 2 is a schematic diagram showing an example of the configuration of the ONU identifier list T5. The ONU identifier list T5 is two-dimensional tabular data in which the ONU identifier and the first internal identifier are associated with each other. As shown in FIG. 2, for example, the ONU identifier "aaa" is associated with the first internal identifier "001", and the ONU identifier "fff" is associated with the first internal identifier "mmm".

FIG. 3 is a schematic diagram showing an example of the configuration of the line identifier list T6. The line identifier list T6 is two-dimensional tabular data in which the line identifier and the second internal identifier are associated with each other. As shown in FIG. 3, for example, the line identifier "xxx" is associated with the second internal identifier "iii", and the line identifier "zzz" is associated with the second internal identifier "nnn".

The PON functional unit 510 and the concentrating unit 520 are composed of separate semiconductor components, and the ONU identifier list T5 and the line identifier list T6 are stored in the memory or register included in the semiconductor component constituting the own functional unit, respectively. There is. The ONU identifier, the first internal identifier, the line identifier, and the second internal identifier are not designed on the premise that the PON function unit 510 and the concentrating unit 520 are consistent with each other. Therefore, as shown in FIGS. 2 and 3, the ONU identifier, the first internal identifier, the line identifier, and the second internal identifier are identifications that are not related to each other.

Therefore, for example, the user needs to associate different identifiers in advance based on the ONU identifier list T5 and the line identifier list T6 in order to enable conversion between the ONU identifier and the line identifier. The list in which different identifiers are associated is the inter-functional list T7.

FIG. 4 is a schematic diagram showing an example of the configuration of the list T7 between functional units. The inter-functional list T7 is, for example, two-dimensional tabular data in which an ONU identifier, a first internal identifier, a line identifier, and a second internal identifier are associated with each other. As shown in FIG. 4, for example, the ONU identifier "aaa", the first internal identifier "001", the line identifier "zzz", and the second internal identifier "nnn" are associated with each other, and the ONU identifier "fff" is used. The first internal identifier "mmm", the line identifier "yyy", and the second internal identifier "jjj" are associated with each other.

For example, the frame receiving unit 511 receives an uplink frame from a certain ONU200. The uplink frame contains, for example, the ONU identifier "aaa". The frame receiving unit 511 transfers the received uplink frame to the identifier conversion unit 512.

The identifier conversion unit 512 acquires an uplink frame from the frame receiving unit 511. The identifier conversion unit 512 reads the ONU identifier "aaa" included in the uplink frame. The identifier conversion unit 512 refers to the ONU identifier list T5 stored in the ONU identifier list storage unit 513. The identifier conversion unit 512 identifies the first internal identifier "001" corresponding to the read ONU identifier "aaa" based on the ONU identifier list T5. The identifier conversion unit 512 deletes the ONU identifier "aaa" included in the uplink frame, and assigns the specified first internal identifier "001" to the uplink frame. The identifier conversion unit 512 outputs an uplink frame to which the first internal identifier "001" is assigned to the concentrating unit 520.

The identifier conversion unit 522 acquires an uplink frame from the frame reception unit 521. The identifier conversion unit 522 reads the first internal identifier "001" included in the uplink frame. The identifier conversion unit 522 refers to the inter-functional list T7 stored in the inter-functional list storage unit 530. The identifier conversion unit 522 identifies the line identifier "zzz" corresponding to the read first internal identifier "001" based on the inter-functional unit list T7. The identifier conversion unit 512 deletes the first internal identifier "001" included in the uplink and assigns the specified line identifier "zzz" to the uplink. The identifier conversion unit 522 outputs an uplink frame to which the line identifier "zzz" is added to a higher-level device (not shown) via a higher-level communication network.

Hereinafter, an example of the operation of the OLT 500 in the case of associating the setting contents between the functional units using the inter-functional list will be described.

FIG. 5 is a flowchart showing the operation of the OLT 500 using the inter-functional list. The operation shown in this flowchart starts when an uplink frame is transmitted from the ONU 200 to the OLT 500 via the optical fiber transmission line 300.

The frame receiving unit 511 receives an uplink frame from each ONU200 (step S001). The frame receiving unit 511 transfers the received uplink frame to the identifier conversion unit 512.

The identifier conversion unit 512 acquires an uplink frame from the frame receiving unit 511. The identifier conversion unit 512 reads the ONU identifier included in the uplink. The identifier conversion unit 512 refers to the ONU identifier list T5 stored in the ONU identifier list storage unit 513. The identifier conversion unit 512 identifies the first internal identifier corresponding to the read ONU identifier based on the ONU identifier list T5 (step S002).

When the read ONU identifier does not exist in the ONU identifier list T5 (step S002 / NO), the PON function unit 510 discards the received uplink frame (step S003). This completes the operation of the OLT 500 shown in the flowchart of FIG.

When the read ONU identifier exists in the ONU identifier list T5 (step S002 / YES), the identifier conversion unit 512 deletes the ONU identifier included in the uplink frame and sets the specified first internal identifier as the uplink frame. Grant (step S004). The identifier conversion unit 512 transmits an uplink frame to which the first internal identifier is assigned to the concentrating unit 520 (step S005).

The frame receiving unit 511 of the concentrating unit 520 receives an uplink frame from the identifier conversion unit 512 of the PON function unit 510. The frame receiving unit 511 transfers the received uplink frame to the identifier conversion unit 522.

The identifier conversion unit 522 acquires an uplink frame from the frame reception unit 521. The identifier conversion unit 522 reads out the first internal identifier included in the uplink frame. The identifier conversion unit 522 refers to the inter-functional list T7 stored in the inter-functional list storage unit 530. The identifier conversion unit 522 identifies the line identifier corresponding to the read first internal identifier based on the inter-functional unit list T7 (step S006).

When the read first internal identifier does not exist in the inter-functional list T7 (step S006 / NO), the concentrating unit 520 discards the received uplink frame (step S003). This completes the operation of the OLT 500 shown in the flowchart of FIG.

When the read first internal identifier exists in the inter-functional list T7 (step S006 · YES), the identifier conversion unit 522 deletes the first internal identifier included in the uplink frame and uses the specified line identifier. It is given to the upstream frame (step S007). The identifier conversion unit 512 transmits an uplink frame to which a line identifier is assigned to a higher-level communication network (step S008). This completes the operation of the OLT 500 shown in the flowchart of FIG.

As described above, when associating the setting contents between the functional units using the inter-functional unit list T7, for example, it is necessary for the user to perform the processing of the association between the different identifiers in advance. The process of associating between different identifiers becomes more complicated, especially as the number of each identifier is large. Further, when associating the setting contents between the functional units using the inter-functional unit list T7, in addition to the ONU identifier list T5 and the line identifier list T6, the inter-functional unit list T7 generated for associating both lists. Therefore, more memory or register storage capacity is required.

Hereinafter, in order to solve the above problems, an example of a PON system configuration that associates setting contents between functional units by using a list reference with a pointer will be described.

[Config of PON system]
FIG. 6 is a block diagram showing a functional configuration of the PON system 1 according to the embodiment of the present invention. As shown in FIG. 6, the PON system 1 has an OLT 100, a plurality of OLT 200s, and an optical fiber transmission line 300. The PON system 1 has a configuration in which a single-core optical fiber is shared by a plurality of subscribers. Therefore, the PON system 1 makes it possible to improve the line usage efficiency and reduce the physical cost.

The OLT 100 is an optical subscriber line end station device installed on the communication station building side. The OLT 100 is connected to the upper communication network and the optical fiber transmission line 300.
The ONU 200 is an optical subscriber line termination device installed on each user's home side. The ONU 200 is connected to an optical fiber transmission line 300 and a terminal device (not shown). The terminal device is, for example, a personal computer or a router installed in each user's home.
The optical fiber transmission line 300 connects the OLT 100 and a plurality of OLT 200 by one-to-many (Point to Multi-Point) communication. The optical fiber transmission line 300 includes optical combined demultiplexing means 301. The optical duplexing means 301 is, for example, an optical splitter.

[Functional configuration of OLT]
Hereinafter, the functional configuration of the OLT 100 will be described.
As shown in FIG. 6, the OLT 100 includes a PON function unit 110 and a concentrating unit 120. The PON function unit 110 and the concentrator unit 120 are each composed of individual semiconductor components.

The PON function unit 510 terminates, for example, an IEEE802.3 compliant MPCP / OAM.
The concentrator 520 aggregates and forwards traffic from a plurality of PON ports (not shown).

As shown in FIG. 6, the PON function unit 110 includes a frame receiving unit 111, an identifier conversion unit 112, and an ONU identifier list storage unit 113.

The frame receiving unit 111 receives an uplink frame from each ONU200. The uplink frame contains an ONU identifier that identifies the ONU 200. The frame receiving unit 111 transfers the received uplink frame to the identifier conversion unit 112.

The identifier conversion unit 112 acquires an uplink frame from the frame reception unit 111. The identifier conversion unit 112 reads the ONU identifier included in the uplink frame. The identifier conversion unit 512 refers to the ONU identifier list T1 stored in the ONU identifier list storage unit 113. The identifier conversion unit 112 identifies an internal identifier corresponding to the read ONU identifier based on the ONU identifier list T1. The identifier conversion unit 112 deletes the ONU identifier included in the uplink frame and assigns the specified internal identifier to the uplink frame. The identifier conversion unit 112 outputs the uplink frame to which the internal identifier is given to the concentrating unit 120.

The ONU identifier list storage unit 113 stores the ONU identifier list T1. The ONU identifier list T1 is a list in which an ONU identifier and an internal identifier are associated with each other. The ONU identifier list T1 is generated by a user, for example, and is recorded in advance in the ONU identifier list storage unit 113. The internal identifier is preset by the user, for example, so as to be unique for each ONU identifier. The ONU identifier list storage unit 113 includes a memory or a register included in a semiconductor component such as an ASIC.

As shown in FIG. 6, the concentrating unit 120 includes a frame receiving unit 121, an identifier conversion unit 122, and a line identifier list storage unit 123.

The frame receiving unit 121 receives an uplink frame from the identifier conversion unit 112 of the PON function unit 110. The uplink frame includes an internal identifier assigned by the identifier conversion unit 112. The frame receiving unit 121 transfers the received uplink frame to the identifier conversion unit 122.

The identifier conversion unit 122 acquires an uplink frame from the frame reception unit 121. The identifier conversion unit 122 reads the internal identifier included in the uplink frame. The identifier conversion unit 122 refers to the line identifier list T2 stored in the line identifier list storage unit 123. The identifier conversion unit 122 identifies the line identifier corresponding to the read internal identifier based on the line identifier list T2.

Specifically, each line of the line identifier list T2 does not have an internal identifier, but instead has a pointer pointing to the address of each line of the ONU identifier list T1. The identifier conversion unit 122 searches the ONU identifier list T1 for the internal identifier assigned to the uplink frame via the pointer, and identifies the corresponding line identifier.

The identifier conversion unit 512 deletes the internal identifier included in the uplink and assigns the specified line identifier to the uplink. The identifier conversion unit 122 outputs an uplink frame to which a line identifier is assigned to a higher-level device (not shown) via a higher-level communication network.

The line identifier list storage unit 123 stores the line identifier list T2. The line identifier list T2 is a list of line identifiers. As described above, the line identifier list T2 has a pointer indicating the address of each line of the ONU identifier list T1. The line identifier list T2 is generated by a user, for example, and is recorded in advance in the line identifier list storage unit 123. The line identifier list storage unit 523 includes a memory or a register included in a semiconductor component such as an ASIC.

In this way, when associating the setting contents between the functional parts by using the list reference by the pointer, it is not necessary to perform the processing of the correspondence between different identifiers by the user in advance. Further, in this case, it is sufficient that there is a storage capacity of a memory or a register for storing the ONU identifier list T1 and the line identifier list T2. Further, in this case, only the storage capacity of the memory or the register for storing the line identifier in the line identifier list T2 is sufficient. That is, in this case, a storage capacity for storing an internal identifier or the like is not required.

The case of associating the setting contents between the functional parts by using the list reference by the pointer will be described below with a specific example.

FIG. 7 is a schematic diagram showing an example of the configuration of the ONU identifier list T1 according to the embodiment of the present invention. The ONU identifier list T1 is two-dimensional tabular data in which an ONU identifier and an internal identifier are associated with each other. As shown in FIG. 7, for example, the ONU identifier "aaa" is associated with the internal identifier "001", and the ONU identifier "fff" is associated with the internal identifier "mmm".

FIG. 8 is a schematic diagram showing an example of the configuration of the line identifier list T2 according to the embodiment of the present invention. The line identifier list T2 is data indicating a list of line identifiers. As described above, each line of the line identifier list T2 has a pointer pointing to the address of each line of the ONU identifier list T1.

The PON functional unit 110 and the concentrating unit 120 are composed of separate semiconductor components, and the ONU identifier list T1 and the line identifier list T2 are stored in the memory or register included in the semiconductor component constituting the own functional unit, respectively. There is.

For example, the frame receiving unit 111 receives an uplink frame from a certain ONU200. The uplink frame contains, for example, the ONU identifier "aaa". The frame receiving unit 111 transfers the received uplink frame to the identifier conversion unit 112.

The identifier conversion unit 112 acquires an uplink frame from the frame reception unit 111. The identifier conversion unit 112 reads the ONU identifier "aaa" included in the uplink frame. The identifier conversion unit 112 refers to the ONU identifier list T1 stored in the ONU identifier list storage unit 113. The identifier conversion unit 112 identifies the internal identifier “001” corresponding to the read ONU identifier “aaa” based on the ONU identifier list T1. The identifier conversion unit 112 deletes the ONU identifier "aaa" included in the uplink frame, and assigns the specified internal identifier "001" to the uplink frame. The identifier conversion unit 112 outputs an uplink frame to which the internal identifier "001" is assigned to the concentrating unit 120.

The identifier conversion unit 122 acquires an uplink frame from the frame reception unit 121. The identifier conversion unit 122 reads the internal identifier "001" included in the uplink frame. The identifier conversion unit 122 refers to the line identifier list T2 stored in the line identifier list storage unit 123. The identifier conversion unit 122 identifies the line identifier corresponding to the read internal identifier "001" based on the line identifier list T2. Specifically, the identifier conversion unit 122 searches the ONU identifier list T1 for the internal identifier "001" assigned to the uplink frame via the pointer, and identifies the corresponding line identifier "zzz". The identifier conversion unit 112 deletes the internal identifier "001" included in the uplink frame and assigns the specified line identifier "zzz" to the uplink frame. The identifier conversion unit 122 outputs an uplink frame to which the line identifier "zzz" is added to a higher-level device (not shown) via a higher-level communication network.

Hereinafter, an example of the operation of the OLT 100 in the case of associating the setting contents between the functional parts by using the list reference by the pointer will be described.

FIG. 9 is a flowchart showing the operation of the OLT 100 according to the embodiment of the present invention. The operation shown in this flowchart starts when an uplink frame is transmitted from the ONU 200 to the OLT 100 via the optical fiber transmission line 300.

The frame receiving unit 111 receives an uplink frame from each ONU200 (step S101). The frame receiving unit 111 transfers the received uplink frame to the identifier conversion unit 112.

The identifier conversion unit 112 acquires an uplink frame from the frame reception unit 111. The identifier conversion unit 112 reads the ONU identifier included in the uplink frame. The identifier conversion unit 112 refers to the ONU identifier list T1 stored in the ONU identifier list storage unit 113. The identifier conversion unit 112 identifies an internal identifier corresponding to the read ONU identifier based on the ONU identifier list T1 (step S102).

When the read ONU identifier does not exist in the ONU identifier list T1 (step S102 / NO), the PON function unit 110 discards the received uplink frame (step S103). This completes the operation of the OLT 500 shown in the flowchart of FIG.

When the read ONU identifier exists in the ONU identifier list T1 (step S001 / YES), the identifier conversion unit 112 deletes the ONU identifier included in the uplink frame and assigns the specified internal identifier to the uplink frame. (Step S104). The identifier conversion unit 112 transmits an uplink frame to which an internal identifier is assigned to the concentrating unit 120 (step S105).

The frame receiving unit 121 of the concentrating unit 120 receives an uplink frame from the identifier conversion unit 112 of the PON function unit 110. The frame receiving unit 121 transfers the received uplink frame to the identifier conversion unit 122.

The identifier conversion unit 122 acquires an uplink frame from the frame reception unit 121. The identifier conversion unit 122 reads the internal identifier included in the uplink frame. The identifier conversion unit 122 refers to the line identifier list T2 stored in the line identifier list storage unit 123. The identifier conversion unit 122 identifies the line identifier corresponding to the read internal identifier based on the line identifier list T2. Specifically, the identifier conversion unit 122 searches the ONU identifier list T1 for the internal identifier assigned to the uplink frame via the pointer, and identifies the corresponding line identifier. (Step S106).

The identifier conversion unit 122 deletes the internal identifier included in the uplink frame and assigns the specified line identifier to the uplink frame (step S107). The identifier conversion unit 512 transmits an uplink frame to which a line identifier is assigned to a higher-level communication network (step S108). This completes the operation of the OLT 100 shown in the flowchart of FIG.

As described above, when associating the setting contents between the functional parts by using the list reference by the pointer, it is not necessary to perform the processing of the correspondence between different identifiers in advance depending on the user, for example. If the process of associating between different identifiers is performed, the larger the number of each identifier, the more complicated the process. On the other hand, when the setting contents between the functional parts are associated by using the list reference by the pointer, the association between the functional parts for the setting brother is automatically performed, and the setting becomes easy.

Further, when associating the setting contents between the functional units by using the list reference by the pointer, it is sufficient that there is a storage capacity of a memory or a register for storing the ONU identifier list T1 and the line identifier list T2. Further, in this case, only the storage capacity of the memory or the register for storing the line identifier in the line identifier list T2 is sufficient. That is, in this case, a storage capacity for storing an internal identifier or the like is not required. This makes it possible to reduce the amount of memory or register usage when associating the setting contents between the functional parts by using the list reference by the pointer.

When associating the setting contents between functional parts by using the list reference by the pointer, it is necessary that the value is always set in the ONU identifier list to which the pointer is referred. That is, when the setting contents between the functional parts are related by using the list reference by the pointer, the setting order is restricted. The limitation of the setting order here is that the ONU identifier list must be set first in the PON function unit 110, and then the line identifier list must be set in the concentrating unit 120.

In order to avoid such restrictions on the setting order, the PON function unit 110 may be configured so that a dummy value that is not actually used is registered in the ONU identifier list in the initial state. As a dummy value, for example, a link local address can be used. A link-local address is a valid network address for communication within the network segment or broadcast domain to which the host is connected. Link-local addresses are not guaranteed to be unique across network segments. Therefore, the router does not forward the packet using the link local address.

As described above, in the OLT 100 according to the embodiment of the present invention, the ONU identifier included in the ONU identifier list T1 and the line identifier included in the line identifier list T2 are associated with each other by a pointer. By providing such a configuration, the OLT 100 can easily match the setting contents among the plurality of functional units of the own device.

Further, by providing such a configuration, according to the OLT 100, it is not necessary to perform complicated processing such as a processing of associating between different identifiers by a user in advance.
Further, by providing such a configuration, according to the OLT 100, it is possible to reduce the storage capacity of the storage medium required for recording the set contents.

According to the above-described embodiment, the communication device includes a first functional unit and a second functional unit. For example, the communication device is the OLT 100 in the embodiment, the first functional unit is the PON functional unit 10 in the embodiment, and the second functional unit is the concentrating unit 120 in the embodiment.

The first function unit acquires communication data and operates based on the first setting information included in the acquired communication data and the first list which is a list including a plurality of first setting information. For example, the communication data is an uplink frame in the embodiment, the first setting information is the ONU identifier in the embodiment, and the first list is the ONU identifier list 11 in the embodiment.

The second function unit acquires information based on the first setting information included in the communication data from the first function unit, and is a list including the acquired information and a plurality of second setting information, and is an address of the first list. It operates based on the second list, which is a list in which the pointer pointing to is associated with each second setting information. For example, the information based on the first setting information is an internal identifier (or ONU identifier) in the embodiment, the address in the first list is the address of each line of the ONU identifier list 11 in the embodiment, and the second setting information is. , The line identifier in the embodiment, and the second list is the line identifier list T2 in the embodiment.

The first functional unit receives the first communication data from the first communication device, and the second functional unit secondly communicates the second communication data generated based on the information and the second list. It may be sent to the device. For example, the first communication device is the ONU200 in the embodiment, the first communication data is an uplink frame to which the ONU identifier transmitted from the ONU200 to the OLT100 in the embodiment is assigned, and the second communication data is the ONU200. It is an uplink frame to which a line identifier transmitted from the OLT 100 in the embodiment to a higher-level device (not shown) via a higher-level communication network is assigned, and the second communication device is the higher-level device in the embodiment.

The first list is a list in which the first setting information and the identifier are associated with each other, the first function unit outputs the communication data to which the identifier is given to the second function unit, and the second function unit is Communication data to which the second setting information associated with the pointer indicating the address in which the identifier given to the communication data in the first list is stored may be transmitted may be transmitted. For example, the identifier is an internal identifier in the embodiment.

The first setting information may be an identifier that identifies the subscriber line terminator, and the second setting information may be a virtual local area network identifier (VID). For example, the identifier that identifies the subscriber line terminator is a MAC address or a logical link identifier (LLID) in the embodiment.

In the first list, the link local address may be stored in the address that does not store the identifier that identifies the subscriber line terminator.

Further, according to the above-described embodiment, the communication device includes a plurality of functional units each holding a list for storing a plurality of set values. The list held by each functional unit stores the setting values associated between different functional units line by line. The list held by the second function unit that receives communication data from the first function unit has a pointer that points to a row (address) of the list held by the first function unit. The second function unit searches for the set value included in the list held by the first function unit via the pointer based on the communication data received from the first function unit. The second functional unit specifies the setting value of the self-functional unit corresponding to the searched setting value of the first functional unit.

For example, the list held by the first function unit is the ONU identifier list T1 in the embodiment, and the list held by the second function unit is the line identifier list T2 in the embodiment, and the list held by the first function unit. The set value included in is the ONU identifier in the embodiment, and the set value of the self-functioning unit (second functional unit) is the line identifier in the embodiment.

The OLT100 in each of the above-described embodiments may be realized by a computer. In that case, a program for realizing this function may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read by a computer system and executed. The term "computer system" as used herein includes hardware such as an OS and peripheral devices. Further, the "computer-readable recording medium" refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, or a CD-ROM, and a storage device such as a hard disk built in a computer system. Further, a "computer-readable recording medium" is a communication line for transmitting a program via a network such as the Internet or a communication line such as a telephone line, and dynamically holds the program for a short period of time. It may also include a program that holds a program for a certain period of time, such as a volatile memory inside a computer system that is a server or a client in that case. Further, the above program may be for realizing a part of the above-mentioned functions, and may be further realized for realizing the above-mentioned functions in combination with a program already recorded in the computer system. It may be realized by using a programmable logic device such as FPGA (Field Programmable Gate Array).

As described above, the embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment, and the design and the like within a range not deviating from the gist of the present invention are also included.

1, 5 ... PON system, 110 ... PON function unit, 111 ... frame receiving unit, 112 ... identifier conversion unit, 113 ... ONU identifier list storage unit, 120 ... concentrating unit, 121 ... frame receiving unit, 122 ... identifier conversion unit, 123 ... Line identifier list storage unit, 300 ... Optical fiber transmission line, 301 ... Optical combined demultiplexing means, 510 ... PON function unit, 511 ... Frame receiving unit, 512 ... Identifier conversion unit, 513 ... ONU identifier list storage unit, 520 ... Concentrating unit, 521 ... Frame receiving unit, 522 ... Identifier conversion unit, 523 ... Line identifier list storage unit, 530 ... Functional unit list storage unit

Claims

A first functional unit that operates based on a first setting information that acquires communication data and is included in the acquired communication data, and a first list that is a list including a plurality of the first setting information.
Information based on the first setting information included in the communication data is acquired from the first functional unit, and the acquired information and a list including a plurality of second setting information are indicated to indicate the address of the first list. A second list, which is the list in which the pointer is associated with each second setting information, a second function unit that operates based on the second list, and a second function unit.
A communication device equipped with.
Based on the information, the second functional unit identifies the pointer pointing to the address in which the first setting information is stored in the first list, and the second setting information associated with the specified pointer. The communication device according to claim 1, which operates based on the above.
The first functional unit receives the first communication data from the first communication device, and receives the first communication data.
The communication device according to claim 1 or 2, wherein the second functional unit transmits a second communication data generated based on the information and the second list to the second communication device.
The first list is a list in which the first setting information and an identifier are associated with each other.
The first function unit outputs the communication data to which the identifier is given to the second function unit.
The second functional unit transmits the communication data to which the second setting information associated with the pointer pointing to the address in which the identifier given to the communication data is stored in the first list is added. The communication device according to claim 3.
The first setting information is an identifier that identifies the subscriber line terminator.
The communication device according to any one of claims 1 to 4, wherein the second setting information is a virtual local area network identifier.
The communication device according to claim 5, wherein the first list stores a link-local address in an address that does not store an identifier that identifies a subscriber line terminator.
A communication device having a plurality of functional units each holding a list for storing a plurality of setting values, and the list held by each functional unit is a communication device that stores the setting values associated between different functional units line by line. ,
The list held by the second function unit that receives communication data from the first function unit has a pointer that points to a line of the list held by the first function unit.
Based on the communication data received from the first functional unit, the second functional unit searches for a set value included in the list held by the first functional unit via a pointer, and the first first functional unit is searched. A communication device that specifies the setting value of the self-functioning unit that corresponds to the setting value of the functional unit.
A first step of acquiring communication data and operating based on a first setting information included in the acquired communication data and a first list which is a list including a plurality of the first setting information.
Information based on the first setting information included in the communication data is acquired, and a pointer pointing to the address of the first list, which is a list including the acquired information and a plurality of second setting information, is each second setting. A second list, which is the list associated with information, a second step that operates based on the second list, and
Communication method with.