CN101188534B - A device and method for realizing signaling communication network and network communication network channel - Google Patents
A device and method for realizing signaling communication network and network communication network channel Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
- H04J3/1605—Fixed allocated frame structures
- H04J3/1611—Synchronous digital hierarchy [SDH] or SONET
- H04J3/1617—Synchronous digital hierarchy [SDH] or SONET carrying packets or ATM cells
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/407—Bus networks with decentralised control
- H04L12/413—Bus networks with decentralised control with random access, e.g. carrier-sense multiple-access with collision detection [CSMA-CD]
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- H04J—MULTIPLEX COMMUNICATION
- H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
- H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
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- H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
- H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
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Abstract
The present invention discloses a device and a method to achieve an information-order communication network and a management communication network channel. The device comprises an element location control monolithic board which is connected through an Ethernet interface, and at least one optical interface monolithic board; the element location control monolithic board is used to accomplish a route agreement, and to process or transmit an Ethernet message; the optical interface monolithic board is used to insert and draw the expense of an optical signal, and to adapt and transmit the optical signal messages with different patterns. By utilizing the Ethernet technology, the ECC network management information-order and the ASON information-order of an optical transfer element location apparatus can share a data bus, a three-level exchanging unit which is realized through hardware is adopted to lighten the pressure of a C P U unit; a mass-storage high-speed S C N and M C N channels are realized in a transfer apparatus with minimum cost, the device and the method not only are compatible with the prior IP over PPP outer interface, but also provide the functions of big bandwidth, low C P U load, and bus repeat using, thereby providing the support of the stronger processing ability for realizing the intellectualization of the optical transfer apparatus.
Description
Technical field
The present invention relates to SDH (Synchronous Digital Hierarchy) technology and optical transport hierarchy technology, in particular, a kind of SCN and MCN passage implement device and method that is used for optical transmission device.
Background technology
In optical transmission device (SDH/OTH equipment), signaling communication network (SCN, SignalingCommunication Network) and management communication network (MCN, ManagementCommunication Network) be the product platform of realizing optical transmission device control signaling transmission and network management.
General High-Level Data Link Control (the HDLC that adopts two 2Mbps to 8Mbps of traditional SCN and MCN passage, High-level Data Link Control) bus is respectively as the communication channel between network element control veneer (NCP) and each veneer, the Optical Transmission Network OTN element device externally uses IP overPPP (the Point-to-Point Protocol of standard, point-to-point protocol) mode, being that the IP packet is packed advances in the point-to-point protocol frame to transmit, transmit the webmaster signaling by the MCN bearer path, and transmit the ASON signaling by the SCN bearer path.
Along with SDH (Synchronous Digital Hierarchy; SDH (Synchronous Digital Hierarchy)) development of technology and OTH (optical transport hierarchy) technology; to (the general multiple protocols sign exchanges based on GMPLS; Generalized Multi-protocol Label Switching) the VC3/VC4 particle business of agreement, based on the professional of optical wavelength and based on the business of bag; carry out processing such as unified intelligent scheduling and protection recovery, become SDH technology of future generation and OTH Developing Trend in Technology.Along with the intelligent development of network, the traffic of management and control signaling is more and more huger, and when device port was numerous, traditional HDLC bus can't be carried, and the CPU of network element control veneer also can't handle so numerous E-Packeting.
In order to satisfy technical development to the new demand on bandwidth and the communication quality, just need to adopt a kind of new mode to realize inner SCN of transmission equipment and MCN bus, bigger bandwidth, lower cpu load, bus number still less are provided.
In the prior art, Ethernet has the chip support of a large amount of open protocol and One's name is legion as a kind of widely used communication technology, but prior art does not adopt ethernet technology to realize SCN and MCN signalling path.
Therefore, there is defective in prior art, needs to improve.
Summary of the invention
The objective of the invention is to propose a kind of apparatus and method that realize signaling communication network and management communication network channel, technical problem to be solved is how to utilize ethernet technology to realize SCN and MCN signalling path, can with original IP over PPP external interface compatibility, big bandwidth, low cpu load and the multiplexing function of bus can be provided again.
Technical scheme of the present invention is as follows:
A kind of device of realizing signaling communication network and management communication network channel wherein, comprises the network element control veneer and at least one optical interface veneer that are connected by Ethernet interface; Described network element control veneer is used to finish Routing Protocol, processing or transmits the Ethernet message; Described optical interface veneer is used to insert and extract the overhead byte of light signal, and the light signal message of different-format is carried out adaptive and transmits.
Described device, wherein, described network element control veneer comprises a CPU element, one or three layers of crosspoint and each signaling interface; Described CPU element is used for configuration and manages described three layers of crosspoint, the described Ethernet message of processing; Described three layers of crosspoint are used to finish Routing Protocol, transmit described Ethernet message.
Described device, wherein, described three layers of crosspoint comprise routing module, are used for IP relatedly with VLAN, realize the quick forwarding of IP message.
Described device, wherein, described optical interface veneer comprises interface unit, overhead byte processing unit and message adaptation unit; Described interface unit is used to finish external connection, opto-electronic conversion and transmission signal; Described overhead byte processing unit is used to insert and extract the overhead byte of light signal; Described message adaptation unit is used for carrying out adaptive and forwarding to the light signal message of different-format, and the form of described light signal message is PPP frame or ethernet frame.
Described device wherein, carries out point-to-point physical connection by the backboard Ethernet interface between described network element control veneer and each the optical interface veneer.
A kind of method that realizes signaling communication network and management communication network channel, be used for comprising the device of network element control veneer and at least one optical interface veneer, this method may further comprise the steps: A1, optical interface veneer receiving optical signals also extract overhead byte, after outside signaling carried out the PPP decapsulation, be encapsulated into ethernet frame, adding purpose address and VLAN ID send to the network element control veneer; Wherein, the content of described ethernet frame comprises at least, signaling communication network message or management communication network message one of them; A2, described network element control veneer receive described ethernet frame, judge that its content is that IP message and its destination address are not this network elements, then is forwarded to described destination address; Otherwise handle the content of described ethernet frame;
Described method, wherein, at up direction, this method is further comprising the steps of: B1, network element control veneer send to the optical interface veneer with ethernet frame; B2, described optical interface veneer are encapsulated into the PPP frame after described ethernet frame is carried out decapsulation; B3, according to described VLAN ID, described PPP frame inserted the overhead byte of light signal and send.
Described method wherein, in the steps A 1, when being encapsulated into ethernet frame, is also added relevant information; Described relevant information comprise at least source address, tag protocol identifier, IP type of message or Frame Check Sequence one of them.
Described method, wherein, steps A 1 is also carried out following steps: dispose described overhead byte position; Described overhead byte position comprise at least data communication channel, extended data communication channel or General Purpose Communication Channel one of them.
Described method, wherein, described decapsulation specifically may further comprise the steps: after carrying out frame demarcation, error detection and information extraction, whether the data of judging encapsulation the IP message, is then to extract the IP message, otherwise extracts the PPP payload.
Adopt such scheme, the present invention is by utilizing the technology of Ethernet, makes that Optical Transmission Network OTN element device ECC webmaster signaling, ASON signaling can common data bus, adopts the pressure that alleviates CPU element by hard-wired three layers of crosspoint; Thereby the SCN and the MCN passage of high-capacity and high-speed in transmission equipment, have been realized with minimum cost, both with original IP over PPP external interface compatibility, big bandwidth, low cpu load and the multiplexing function of bus are provided again, for the intellectuality of optical transmission device realizes providing the more support of strength reason ability.
Description of drawings
Fig. 1 is the structural representation of apparatus of the present invention;
Fig. 2 is the external network networking schematic diagram of apparatus of the present invention;
Fig. 3 is the signaling conveying flow figure of the inventive method;
Fig. 4 is that the SCN and the MCN passage of the inventive method realized schematic diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
The objective of the invention is to propose a kind of novel SCN that is applied to optical transmission device and MCN passage implement device and method, the advantage that can make full use of the Ethernet platform by these apparatus and method provides high-quality SCN of a kind of high bandwidth and MCN passage for transmission equipment.
The invention provides a kind of device of realizing signaling communication network and management communication network channel, network element control veneer NCP with the Optical Transmission Network OTN element device handles core, with each optical interface veneer is auxiliary processing unit, can adopt the backboard Ethernet interface to carry out point-to-point physical connection between network element control veneer and each the optical interface veneer, the network element control veneer is as message routing and handle core, integrated high-speed CPU element and crosspoint are finished the mutual of Routing Protocol, the exchange of inner ethernet frame and external IP bag; Each optical interface veneer is mainly finished the message buffering and the adaptation processing of the inside and outside different frame formats of Optical Transmission Network OTN element device.
As shown in Figure 1, apparatus of the present invention comprise network element control veneer and at least one optical interface veneer that is connected by Ethernet interface; Described network element control veneer is used to finish Routing Protocol, processing or transmits the Ethernet message; Described optical interface veneer is used to insert and extract the overhead byte of light signal, and the light signal message of different-format is carried out adaptive and transmits.
Under the general situation, can carry out point-to-point physical connection by the backboard Ethernet interface between described network element control veneer and each the optical interface veneer; In case of necessity, also can directly be connected, and be arranged on the veneer between described network element control veneer and each optical interface veneer by Ethernet interface.
For example, described network element control veneer comprises a CPU element, one or three layers of crosspoint and each signaling interface; Described CPU element is used for configuration and manages described three layers of crosspoint, the described Ethernet message of processing; Described three layers of crosspoint are used to finish Routing Protocol, transmit described Ethernet message.
Wherein, described three layers of crosspoint can comprise routing module, are used to manage a routing table, can configuration of IP and VLAN between relation, thereby IP is related with VLAN, to realize the quick forwarding of IP message.
Described device, wherein, described optical interface veneer comprises interface unit, overhead byte processing unit and message adaptation unit; Described interface unit is used to finish external connection, opto-electronic conversion and transmission signal; Described overhead byte processing unit is used to insert and extract the overhead byte of light signal; Described message adaptation unit is used for carrying out adaptive and forwarding to the light signal message of different-format, and the form of described light signal message is PPP frame or ethernet frame.
Below be a complete example of the single network element device of the present invention, as shown in Figure 1, single network element specifically can comprise following each unit.
CPU element: be responsible for agreement and algorithm process, be positioned on the NCP veneer.
Three layers of crosspoint: be responsible for the Ethernet message and transmit, carry out the IP message switching, CPU element by corresponding communication interface realization to the configuration management of crosspoint and with the data passes of crosspoint, be positioned on the NCP veneer.
Message adaptation unit: message buffering and the adaptation processing of finishing the inside and outside different frame formats of Optical Transmission Network OTN element device, one end of the message buffering unit of each optical interface veneer is realized point-to-point physical connection by the crosspoint of backboard Ethernet interface and NCP veneer, an other end of message buffering unit connects the overhead byte processing unit, and the message buffering unit is positioned on the optical interface veneer.
The overhead byte processing unit: finish in the SDH/OTH frame structure, the extraction and the insertion of associated overhead byte byte as the temporary location between message buffering unit and the interface unit, are positioned on the optical interface veneer.
Interface unit: finish external optical fiber and connect and corresponding light/functions such as electricity conversion, be positioned on the optical interface veneer.
When adopting equipment network of the present invention, as shown in Figure 2, the CPU element interface of this network element NCP veneer, ASON (ASON) out-of-band signalling interface, ECC (error checking correction) webmaster that webmaster signaling interface (Qx mouth) and other network elements are come by the optical interface veneer and ASON interface all adopt the IP exchanged form to carry out the mutual of signaling, inner three layers of switching network adopt VLAN to isolate the data flow of each port, determine the relation of IP and VLAN by the routing table of the inner three layers of crosspoint of configuration NCP, thereby realize the quick forwarding of IP bag, do not need CPU to participate in forwarding behavior, alleviate the CPU velocity pressure.
Owing to work based on pure Ethernet mode in transmission network element device inside, outside signaling comprises ECC gateway signaling and ASON signaling, and the form that need utilize the optical interface veneer to finish IP/PPP frame and ethernet frame changes mutually; As external interface, what each optical interface connected all is a subnet, and transmission equipment is inner by the Frame between methods such as VLAN or passage isolation different sub-network, and the communication between foreign subnet need be disposed routing table and be realized by three layers of exchange.
And as shown in Figure 3, the present invention also provides a kind of method that realizes signaling communication network and management communication network channel, is used for said apparatus.As mentioned above, this device comprises network element control veneer and at least one optical interface veneer, is connected by Ethernet interface between network element control veneer and the optical interface veneer.This method comprises following received signal step.
A1, optical interface veneer receiving optical signals also extract overhead byte, and light signal comprises SDH or OTH signal, then outside signaling is carried out the PPP decapsulation after, be encapsulated into ethernet frame, adding purpose address and VLAN ID send to the network element control veneer.Described decapsulation specifically can may further comprise the steps: after carrying out frame demarcation, error detection and information extraction, whether the data of judging encapsulation the IP message, is then to extract the IP message, otherwise extracts the PPP payload.
In steps A 1, when the encapsulation ethernet frame, except adding purpose address and VLAN ID, can also add relevant information; Described relevant information comprise at least source address, tag protocol identifier, IP type of message or Frame Check Sequence one of them.
In the present invention, the content of described ethernet frame comprise at least signaling communication network message or management communication network message one of them, thereby realize SCN and MSN passage.
And steps A 1 can also be carried out following steps: dispose described overhead byte position; Described overhead byte position comprise at least data communication channel, extended data communication channel or General Purpose Communication Channel one of them.
A2, described network element control veneer receive described ethernet frame, judge that its content is that IP message and its destination address are not this network elements, then is forwarded to described destination address; Otherwise handle the content of described ethernet frame.
For example, ECC webmaster signaling and ASON signaling, the receiver side transmission at equipment can divide following several steps.
The first step: the interface unit receiver side of optical interface veneer receives SDH or OTH signal, extracts SDH or OTH section overhead byte by the overhead byte processing unit.Use therein overhead byte position can be configured by software, and the overhead byte position can be DCC (data communication channel), the expansion DCC of SDH, or the GCC of OTH (General Purpose Communication Channel), and system configuration other overhead byte that need extract.Transmit or use same passage because ECC and ASON signaling may be divided into two passages, so the overhead byte position that ECC and ASON signaling are used should dispose separately, can sharedly also can separate.
Second step: the message adaptation unit carries out the PPP decapsulation of ECC/ASON signaling, finishes frame and delimits, and error detection etc. are the IP bags as what encapsulate, then extract the IP bag, and the non-IP bag as encapsulation then extracts PPP frame payload.
The 3rd step, the message adaptation unit encapsulates IP bag and PPP frame payload respectively and enters ethernet frame, add Ethernet relevant destination address, source address, TPID (tag protocol identifier), VLAN ID (VLAN ID), Type, Ethernet FCS (Frame Check Sequence, Frame Check Sequence) etc., and by the backboard Ethernet send.VLAN ID wherein is used to carry out the identification of overhead byte passage, and Type wherein can be used for distinguishing IP message and non-IP message.
The 4th step: three layers of crosspoint of NCP veneer receive and discern the Ethernet data content frame that receives, arrive the IP message of this network element in this way or be non-IP message, then be sent to the CPU element of this veneer, otherwise transmit according to the IP address, this IP message is handled the back by exchange and mark forward from corresponding ports.
The 5th step: the CPU element of NCP veneer is handled (ECC signaling and the computing of ASON signaling protocol) to the packet that belongs to this network element.
And this method also comprises following forwarding step.
B1, network element control veneer send to the optical interface veneer with ethernet frame;
B2, described optical interface veneer are encapsulated into the PPP frame after described ethernet frame is carried out decapsulation;
B3, according to described VLAN ID, described PPP frame inserted the overhead byte of light signal and send.
For example, ECC webmaster signaling and ASON signaling, the transmitter side transmission at equipment can divide following several steps.
The first step: the CPU element of NCP veneer sends the MCN and the SCN message of Ethernet encapsulation to crosspoint.
Second step: the crosspoint of NCP veneer is handled the message of CPU element transmission and the IP message of receiver side the 4th step forwarding according to message content, together sends to corresponding port.
The 3rd step: optical interface veneer message adaptation unit is finished the decapsulation of ethernet frame, delimit propose with vlan information after, as encapsulation be the IP bag, then extract the IP bag, the non-IP bag as encapsulation then extracts PPP payload wherein.
The 4th step: the message adaptation unit is encapsulated into the PPP frame respectively with IP bag and PPP payload, and the VLAN ID that extracts according to the 3rd step is sent to corresponding overhead byte processing unit.
The 5th step: optical interface veneer overhead byte processing unit, insert SDH or OTH section overhead byte with the PPP frame, and send by interface unit.Use therein overhead byte position is the same with receiver side, can pass through software arrangements.
Be example with the SDH transmission equipment below, the present invention is described in further detail.As shown in Figure 4, be the schematic diagram that the SCN that proposes among the present invention and MCN passage are realized in equipment.
The NCP veneer comprises CPU element and three layers of crosspoint, the optical interface veneer comprises the message adaptation unit and the SDH overhead byte is handled and interface unit, wherein the message adaptation unit is mainly realized the mutual conversion and the buffer memory of ethernet frame and PPP frame, SDH Framer (overhead byte processing unit) realizes the insertion and the extraction (an optical interface veneer can be supported a plurality of light mouths, i.e. multichannel DCC) of SDH overhead byte.
Realize that by ethernet physical layer chip (PHY) backboard is point-to-point interconnected between three layers of crosspoint of the message buffering adaptation unit of optical interface veneer and NCP veneer, bandwidth is 100M.Owing to have a plurality of optical interface veneers in the SDH network element device, so that NCP need provide a plurality of network interfaces and optical interface veneer to carry out is interconnected, end-to-end continuous Star Network structure of backboard Ethernet formation of whole SDH network element device.
At receiver side, the SDH Framer of optical interface veneer finishes the extraction of each light mouth SDH overhead byte in the SDH network element, be sent to message buffering and adaptation processing unit, after here the PPP information bag is separated frame buffer, handle through the Ethernet framing, and be sent to corresponding backboard ethernet port after adding information such as corresponding VLAN, behind the PHY chip on this packet process NCP veneer, be sent to three layers of crosspoint of NCP veneer, crosspoint is a core with the high speed exchange chip, the IP route table item has been set up in inside, and route table items can be generated by Routing Protocol by software.
When exchange chip is received packet, confirm at first whether it is the IP message, non-IP message directly is sent to CPU element and handles, IP message and purpose IP address are this node address in this way, also be sent to this node CPU element and handle, otherwise crosspoint sends it to the output port of appointment according to route table items.
The treatment step and the receiver side of the needs of transmitter side are similar, and just processing sequence is opposite with receiver side, and the present invention is also unrestricted to this.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection range of claims of the present invention.
Claims (9)
1. a device of realizing signaling communication network and management communication network channel is characterized in that, comprises the network element control veneer and at least one optical interface veneer that are connected by Ethernet interface;
Described network element control veneer is used to finish Routing Protocol, processing or transmits the Ethernet message, in the described Ethernet message content of ethernet frame comprise at least signaling communication network message or management communication network message one of them;
Described optical interface veneer is used to insert and extract the overhead byte of light signal, the light signal message of different-format is carried out adaptive and transmits, the position of described overhead byte comprise at least data communication channel, extended data communication channel or General Purpose Communication Channel one of them.
2. device according to claim 1 is characterized in that, described network element control veneer comprises a CPU element, one or three layers of crosspoint and each signaling interface;
Described CPU element is used for configuration and manages described three layers of crosspoint, the described Ethernet message of processing;
Described three layers of crosspoint are used to finish Routing Protocol, transmit described Ethernet message.
3. device according to claim 2 is characterized in that, described three layers of crosspoint comprise routing module, is used for IP relatedly with VLAN, realizes the quick forwarding of IP message.
4. device according to claim 1 is characterized in that, described optical interface veneer comprises interface unit, overhead byte processing unit and message adaptation unit;
Described interface unit is used to finish external connection, opto-electronic conversion and transmission signal;
Described overhead byte processing unit is used to insert and extract the overhead byte of light signal;
Described message adaptation unit is used for carrying out adaptive and forwarding to the light signal message of different-format, and the form of described light signal message is PPP frame or ethernet frame.
5. device according to claim 1 is characterized in that, carries out point-to-point physical connection by the backboard Ethernet interface between described network element control veneer and each the optical interface veneer.
6. method that realizes signaling communication network and management communication network channel is used for comprising the device of network element control veneer and at least one optical interface veneer, and this method may further comprise the steps:
A1, optical interface veneer receiving optical signals also extract overhead byte, outside signaling is carried out the PPP decapsulation after, be encapsulated into ethernet frame, adding purpose address and VLAN ID send to the network element control veneer; Wherein, the content of described ethernet frame comprises at least, signaling communication network message or management communication network message one of them; Dispose described overhead byte position; Described overhead byte position comprise at least data communication channel, extended data communication channel or General Purpose Communication Channel one of them;
A2, described network element control veneer receive described ethernet frame, judge that its content is that IP message and its destination address are not this network elements, then is forwarded to described destination address; Otherwise handle the content of described ethernet frame.
7. method according to claim 6 is characterized in that, at up direction, this method also comprises:
B1, network element control veneer send to the optical interface veneer with ethernet frame;
B2, described optical interface veneer are encapsulated into the PPP frame after described ethernet frame is carried out decapsulation;
B3, according to described VLAN ID, described PPP frame inserted the overhead byte of light signal and send.
8. method according to claim 6 is characterized in that, in the steps A 1, when being encapsulated into ethernet frame, also adds relevant information; Described relevant information comprise at least source address, tag protocol identifier, IP type of message or Frame Check Sequence one of them.
9. method according to claim 6 is characterized in that, described decapsulation specifically may further comprise the steps: after carrying out frame demarcation, error detection and information extraction, whether the data of judging encapsulation the IP message, is then to extract the IP message, otherwise extracts the PPP payload.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101250803A CN101188534B (en) | 2007-12-11 | 2007-12-11 | A device and method for realizing signaling communication network and network communication network channel |
| KR1020107015171A KR101463289B1 (en) | 2007-12-11 | 2008-02-03 | A device and method for implementing a channel of signaling communication network and management communication network |
| PCT/CN2008/000297 WO2009074002A1 (en) | 2007-12-11 | 2008-02-03 | A device and method for implementing a channel of signaling communication network and management communication network |
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| CN2007101250803A CN101188534B (en) | 2007-12-11 | 2007-12-11 | A device and method for realizing signaling communication network and network communication network channel |
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| CN101188534A CN101188534A (en) | 2008-05-28 |
| CN101188534B true CN101188534B (en) | 2011-09-21 |
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|---|---|---|---|---|
| CN101610124B (en) * | 2008-06-19 | 2013-07-24 | 上海贝尔阿尔卡特股份有限公司 | Method and device for managing and controlling optical communication network nodes |
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| CN101977336B (en) * | 2010-11-24 | 2013-02-13 | 电子科技大学 | Bragg diffraction principle-based optical packet switching system and method |
| CN102820946B (en) * | 2011-06-07 | 2017-11-14 | 邳州高新区城市矿产研究院有限公司 | A kind of method of transmission equipment and its proactive dissemination self information |
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| CN1250294A (en) * | 1999-07-27 | 2000-04-12 | 邮电部武汉邮电科学研究院 | Adaption method for fusion of Ethernet with synchronizing digital system or synchronizing optical network |
| KR100632185B1 (en) | 2004-10-15 | 2006-10-11 | 한국전자통신연구원 | Home gateway system for proffering function of matching of optical communication packet data and method for proffering broadcast service in home as the same |
| US20070140271A1 (en) * | 2005-12-21 | 2007-06-21 | Amante Shane M | Method and system for terminating SONET/SDH circuits in an IP network |
| CN1905558B (en) * | 2006-06-28 | 2010-06-30 | 烽火通信科技股份有限公司 | Individualized ethernet exchange plate and data exchanging method |
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| WO2009074002A1 (en) | 2009-06-18 |
| KR20100106467A (en) | 2010-10-01 |
| KR101463289B1 (en) | 2014-11-18 |
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