CN106789162A - A kind of distributed electrical cross system and its alarm transmission method - Google Patents
A kind of distributed electrical cross system and its alarm transmission method Download PDFInfo
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- CN106789162A CN106789162A CN201611054570.4A CN201611054570A CN106789162A CN 106789162 A CN106789162 A CN 106789162A CN 201611054570 A CN201611054570 A CN 201611054570A CN 106789162 A CN106789162 A CN 106789162A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/02—Standardisation; Integration
- H04L41/0246—Exchanging or transporting network management information using the Internet; Embedding network management web servers in network elements; Web-services-based protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
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- Computer Networks & Wireless Communication (AREA)
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- Time-Division Multiplex Systems (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention discloses a kind of distributed electrical cross system and its alarm transmission method, the system includes：Multiple client traffic map units, multiple line activities Multiplexing Units, at least one electricity intersect cell switching unit and the overhead bus for transmitting the warning information of multiple client traffic map units or multiple line activities Multiplexing Units using time-multiplexed mode；Overhead bus with the data frame format transmitting warning information of specific information unit, and information unit carry the port of the client traffic map unit for carrying out alarm status transmission in need or line activities Multiplexing Unit warning information；Electricity intersects cell switching unit, for according to the client traffic map unit or the warning information of line activities Multiplexing Unit for receiving, corresponding pretection switch operation being carried out according to Preservation tactics.The system that the present invention is provided, can be on the basis of system operation load not be increased, it is ensured that stability, timely row and reliability that alarm is transmitted.
Description
Technical field
The present invention relates to communication technique field, espespecially a kind of distributed electrical cross system and its alarm transmission method.
Background technology
As big volume of business showed explosive growth with the demand of the big network bandwidth in recent years, the existing network equipment
The chi structure that client, circuit focus on single equipment has been difficult to meet network bandwidth growth and network agile cross-over configuration
Demand, thus the distributed electrical cross architecture that branch, circuit are separate has been increasingly becoming the transmission net device structure of main flow.
Transmission net as communication network underlying basis network, perfect protection mechanism, the survival ability of network turn into more
Carry out more important evaluation index.For tradition branch, the transmission net equipment of line activities unit centralization, due to pretection switch decision-making
Chip and business chip are all concentrated on a hardware device, and the software in equipment can in time be read by access service chip
Service alarm needed for getting pretection switch, thus in the absence of alarm problem of transmission.
And the branch of distributed electrical cross system, circuit separation architecture determine the natural defect of its network protection design.Protect
Protective switching decision-making chip cannot often focus on same hardware module with alarm detection chip, i.e., protected service alarm detection
Need to be separated in different software systems from pretection switch state machine.With pretection switch state machine rotation in electric cross unit,
Alarm detection is concentrated on as a example by line activities unit, because electric cross unit part is difficult to the announcement that perception service unit is monitored
It is alert, it is necessary to by, line unit protects by alarm report to electric cross unit, then by the pretection switch algorithm decision-making of electric cross unit
Protective switching is acted.The promptness of alarm report, key restriction factors that just can be up to standard into equipment protection switching performance.At present
The mode that most of distributed network equipment is transmitted to alarm, all using Ethernet protocol.But when system equipment board increases to
During certain amount, the protocol analysis of Ethernet, the flow such as network conflict detection becomes influence alarm report stability of channel
Restraining factors.
The content of the invention
The embodiment of the present invention provides a kind of distributed electrical cross system and its alarm transmission method, is used to solve prior art
Present in warning information transmission is not in time or unstable problem in distributed electrical cross system.
A kind of distributed electrical cross system is the embodiment of the invention provides, including：Multiple client traffic map units, multiple
Line activities Multiplexing Unit, at least one electricity intersect cell switching unit and for transmitting multiple using time-multiplexed mode
The overhead bus of the warning information of the client traffic map unit or multiple line activities Multiplexing Units；
The overhead bus transmit the warning information, and the biography with the data frame format of specific information unit
Information unit is sent to carry institute's client traffic map unit or the line activities for carrying out alarm status transmission in need multiple
With the warning information of the port of unit；
The electricity intersects cell switching unit, for according to the client traffic map unit or the circuit for receiving
The warning information of service integration unit, corresponding pretection switch operation is carried out according to Preservation tactics.
In a kind of possible implementation, in above-mentioned distributed electrical cross system provided in an embodiment of the present invention, respectively
Predetermined ad-hoc location in the warning information correspondence information unit of port；
The client traffic map unit or the line activities Multiplexing Unit, for the warning information insertion that will be detected
Corresponding ad-hoc location in the information unit；
The electricity intersects cell switching unit, true for the warning information according to ad-hoc location in the information unit
The port position of existing alarm is made, corresponding pretection switch operation is carried out according to Preservation tactics.
In a kind of possible implementation, in above-mentioned distributed electrical cross system provided in an embodiment of the present invention, institute
The warning information for stating each port carried in information unit is arranged according to particular order.
In a kind of possible implementation, in above-mentioned distributed electrical cross system provided in an embodiment of the present invention, institute
Client traffic map unit or the line activities Multiplexing Unit are stated, for the alarm occurred in each port of real-time detection, and is sentenced
The type of the disconnected alarm for occurring, the criterion according to pretection switch determines to need to carry out the port of alarm status transmission
Warning information.
In a kind of possible implementation, in above-mentioned distributed electrical cross system provided in an embodiment of the present invention, institute
The warning information stated includes：Signal Fail warning information and Signal Degrade warning information.
In a kind of possible implementation, in above-mentioned distributed electrical cross system provided in an embodiment of the present invention, institute
Overhead bus are stated, is additionally operable to intersect between cell switching unit and the client traffic map unit in the electricity, or in institute
State electricity and intersect transmission APS information between cell switching unit and the line activities map unit；
The information unit carry the port for carrying out APS state transmission in need automatic protection
Switch messages.
In a kind of possible implementation, in above-mentioned distributed electrical cross system provided in an embodiment of the present invention, respectively
Predetermined ad-hoc location in the APS information correspondence information unit of port；
The client traffic map unit, the line activities Multiplexing Unit or the electricity intersect cell switching unit, use
The corresponding ad-hoc location in the APS information is inserted into the information unit, and according to the transmission letter
The current state value of the APS information of ad-hoc location determines the APS state of corresponding ports in interest statement unit.
In a kind of possible implementation, in above-mentioned distributed electrical cross system provided in an embodiment of the present invention, institute
The APS information carried in information unit is stated to be located at after the warning information.
In a kind of possible implementation, in above-mentioned distributed electrical cross system provided in an embodiment of the present invention, often
The individual corresponding Signal Fail warning information in port and the Signal Degrade warning information account for 1 bit, each end respectively
The APS information of mouth takes 4 bytes.
In a kind of possible implementation, in above-mentioned distributed electrical cross system provided in an embodiment of the present invention, institute
Stating information unit is also included for the neat reserved byte of couple.
In a kind of possible implementation, in above-mentioned distributed electrical cross system provided in an embodiment of the present invention, institute
Stating information unit also includes the cyclic redundancy check character section for being used to verify.
The embodiment of the present invention additionally provides a kind of alarm transmission method of above-mentioned distributed electrical cross system, including：
Multiple client traffic map units or multiple line activities Multiplexing Units are multiple using the time-division by overhead bus respectively
Mode intersects cell switching unit transmitting warning information to electricity；The overhead bus are with the number of specific information unit
Transmit the warning information according to frame format, and the information unit carry in need carry out the described of alarm status transmission
The warning information of the port of client traffic map unit or the line activities Multiplexing Unit；
The electricity intersects cell switching unit according to the client traffic map unit for receiving or the line activities
The warning information of Multiplexing Unit, corresponding pretection switch operation is carried out according to Preservation tactics.
In a kind of possible implementation, in above-mentioned alarm transmission method provided in an embodiment of the present invention, the announcement
The process of alert state transmission is specifically included：
The warning information insertion that the client traffic map unit or the line activities Multiplexing Unit will be detected is described
Corresponding ad-hoc location in information unit；
The electricity intersects cell switching unit to be determined according to the warning information of ad-hoc location in the information unit
The port position for now alerting, corresponding pretection switch operation is carried out according to Preservation tactics.
In a kind of possible implementation, in above-mentioned alarm transmission method provided in an embodiment of the present invention, described
The warning information that client traffic map unit or the line activities Multiplexing Unit will be detected inserts the information unit
In before corresponding ad-hoc location, also include：
Predefine the ad-hoc location in the warning information correspondence information unit of each port.
In a kind of possible implementation, in above-mentioned alarm transmission method provided in an embodiment of the present invention, the need
The warning information of the port of alarm status transmission is carried out, is determined in the following manner：
The alarm occurred in the client traffic map unit or each port of line activities Multiplexing Unit real-time detection,
And judging the type of the alarm for occurring, criterion according to pretection switch determines to need to carry out the end of alarm status transmission
The warning information of mouth.
In a kind of possible implementation, in above-mentioned alarm transmission method provided in an embodiment of the present invention, also include：
Overhead bus intersect between cell switching unit and the client traffic map unit in the electricity, or described
Electricity intersects transmission APS information between cell switching unit and the line activities map unit；
The information unit carry the port for carrying out APS state transmission in need automatic protection
Switch messages.
In a kind of possible implementation, in above-mentioned alarm transmission method provided in an embodiment of the present invention, it is described from
The transmitting procedure of dynamic pretection switch information is specifically included：
The client traffic map unit, the line activities Multiplexing Unit or the electricity intersect cell switching unit by institute
State APS information and insert corresponding ad-hoc location in the information unit, and according to the information unit
The current state value of the APS information of middle ad-hoc location determines the APS state of corresponding ports.
The present invention has the beneficial effect that：
A kind of distributed electrical cross system and its alarm transmission method are the embodiment of the invention provides, the system includes：It is many
Individual client traffic map unit, multiple line activities Multiplexing Units, at least one electricity intersect cell switching unit and for adopting
The warning information for transmitting with time-multiplexed mode multiple client traffic map units or multiple line activities Multiplexing Unit is opened
Pin bus；Overhead bus are taken with the data frame format transmitting warning information of specific information unit, and information unit
With the client traffic map unit for carrying out alarm status transmission in need or line activities Multiplexing Unit port alarm letter
Breath；Electricity intersects cell switching unit, for according to the client traffic map unit or the announcement of line activities Multiplexing Unit for receiving
Alert information, corresponding pretection switch operation is carried out according to Preservation tactics.Distributed electrical cross system provided in an embodiment of the present invention,
Overhead bus are with the data frame format transmitting warning information of specific information unit, and the information unit carries institute
The warning information for carrying out alarm status transmission in need, electricity intersect cell switching unit can by the warning information that receives,
Corresponding pretection switch operation is carried out according to Preservation tactics.Accused compared to being transmitted using other technologies such as Ethernets in the prior art
Alert information, distributed electrical cross system provided in an embodiment of the present invention carries out alarm transmission using time-multiplexed overhead bus,
Procotol that need not be complicated, can be on the basis of system operation load not be increased, it is ensured that the stability of alarm transmission and
When row and reliability.
Brief description of the drawings
Fig. 1 a are a kind of structural representation of distributed electrical cross system provided in an embodiment of the present invention；
Fig. 1 b are distribution map of each unit on cabinet in a kind of distributed electrical cross system provided in an embodiment of the present invention；
Fig. 2 is the schematic diagram that electricity intersects the control pretection switch operation of cell switching unit；
Fig. 3 is the logic connection diagram of overhead bus；
Fig. 4 is the concrete structure schematic diagram of overhead bus；
Fig. 5 a are the schematic diagram of information unit in embodiment one；
Fig. 5 b are the schematic diagram of information unit in embodiment two；
Fig. 6 is that the flow of the alarm transmission method of above-mentioned distributed electrical cross system provided in an embodiment of the present invention is illustrated
Figure.
Specific embodiment
It is not in time or unstable for warning information transmission in distributed electrical cross system present in prior art
Problem, the embodiment of the invention provides a kind of distributed electrical cross system and its alarm transmission method.
Below in conjunction with the accompanying drawings, to a kind of distributed electrical cross system provided in an embodiment of the present invention and its alarm transmission method
It is described in detail.The shapes and sizes of each several part do not reflect actual proportions in accompanying drawing, and purpose is the schematically illustrate present invention
Content.
Reference picture 1a, the embodiment of the invention provides a kind of distributed electrical cross system, multiple client traffic map units
101st, multiple electricity of line activities Multiplexing Unit 102, at least one intersect cell switching unit 103 and for using time division multiplex
The mode warning information that transmits multiple client traffic map units 101 or multiple line activities Multiplexing Unit 102 expense it is total
Line 104；
Overhead bus 104 are with the data frame format transmitting warning information of specific information unit, and transmission information list
Unit carry the client traffic map unit 101 or line activities Multiplexing Unit 102 for carrying out alarm status transmission in need end
The warning information of mouth；
Electricity intersects cell switching unit 103, for multiple according to the client traffic map unit 101 or line activities for receiving
With the warning information of unit 102, corresponding pretection switch operation is carried out according to Preservation tactics.
Distributed electrical cross system provided in an embodiment of the present invention, overhead bus are with the data of specific information unit
Frame format transmitting warning information, and the information unit carry the warning information for carrying out alarm status transmission in need,
Electricity intersects cell switching unit can carry out corresponding pretection switch behaviour by the warning information that receives according to Preservation tactics
Make.Warning information, distribution provided in an embodiment of the present invention are transmitted compared to the other technologies such as Ethernet are used in the prior art
Electric cross system, alarm transmission is carried out using time-multiplexed overhead bus, it is not necessary to complicated procotol, can not increased
On the basis of adding system operation load, it is ensured that stability, promptness and reliability that alarm is transmitted.
In practical application, above-mentioned client traffic map unit 101, line activities Multiplexing Unit 102 and electricity intersect letter
First crosspoint 103 can respectively make independent board, and each board can be inserted on a cabinet, as shown in Figure 1 b,
Each board is connected by the hardware pins of case back plate, overhead bus 104 can also be arranged on the backboard of cabinet, coordinate hard
Part pin realizes that electricity intersects cell switching unit 103 with client traffic map unit 101 (or line activities Multiplexing Unit 102)
Connection, simply schematically illustrates the approximate location that the board of each unit is inserted on cabinet, in order to conciser is shown in Fig. 1 b
The position of each unit of anticipating, does not draw the connecting line on backboard in figure.Electric cross system includes four in a distributed manner in Fig. 1 a
101, four line activities Multiplexing Units 102 of client traffic map unit and an electricity intersect as a example by cell switching unit 103
Illustrated, cell switching unit is not intersected to client traffic map unit 101, line activities Multiplexing Unit 102 and electricity
103 quantity is defined.
In above-mentioned distributed electrical cross system, above-mentioned client traffic map unit 101 is responsible for fitting the client traffic of access
With being encapsulated into transmission net frame link, the client traffic being adapted to after encapsulation is sent to electricity and intersects cell switching unit 103.Its
In, client traffic can be synchronous digital hierarchy (Synchronous Digital Hierarchy, SDH) or packet switch class
Data service etc., above-mentioned transmission net can be optical transfer network (Optical Transport Network, OTN), synchronous digital body
System (Synchronous Digital Hierarchy, SDH) or the multi-service transport platform (Multiple based on SDH
Spanning Tree Protocol, MSTP) etc.；
Above-mentioned line activities Multiplexing Unit 102 is responsible for for electricity intersecting the client traffic convergence that cell switching unit 103 is dispatched
To in transmission net line port, client traffic can be converged into transmission net line port in the form of cut into slices frame or packet message
In；
In above-mentioned distributed electrical cross system, each electricity intersect cell switching unit 103 can respectively with need and its
Each client traffic map unit 101 and each line activities map unit for carrying out cross-over configuration are connected by overhead bus 104,
Constitute the hub-and-spoke configuration centered on electricity intersection cell switching unit 103, i.e. client traffic map unit 101 and intersect cell with electricity
Two destination nodes that crosspoint 103 communicates as overhead bus 104, carry out real-time Communication for Power；Line activities Multiplexing Unit 102 with
Electricity intersects two destination nodes that cell switching unit 103 communicates as overhead bus 104, carries out real-time Communication for Power；Client traffic reflects
Penetrate the communication link that unit 101 does not exist overhead bus 104 with line activities Multiplexing Unit 102.Electricity intersects cell switching unit
103 as system Centroid, be responsible for client traffic cross-over configuration, process warning information, and control pretection switch behaviour
Make, wherein pretection switch operation can be realized by setting pretection switch state machine.
Needs are remarked additionally, and when electricity intersects cell switching unit 103 multiple, each electricity intersects cell
Crosspoint 103 is according to requirement of system design with needing to carry out the client traffic map unit 101 and line activities of cross-over configuration
Multiplexing Unit 102 is connected by overhead bus 104；And intersect cell switching unit 103 for any electricity it can also be provided that
The form of main-apparatus protection.
Electric cross system framework based on more than, by taking the distributed electrical cross system shown in Fig. 2 as an example, will be to client traffic
When the generation port of map unit 101 and line activities Multiplexing Unit 102 alerts, carrying out pretection switch operation is carried out specifically
It is bright.Wherein, can be comprising multiple client traffics port (in figure as a example by four), circuit industry in client traffic map unit 101
Business Multiplexing Unit 102 can intersect cell switching unit comprising multiple line sharings service port (in figure as a example by two), electricity
103 can also be comprising multiple ports (in figure as a example by comprising tri- ports of P_1, P_2, P_3).As shown in Fig. 2 client traffic reflects
Penetrate unit 101 client traffic of access is fitted in transmission net (such as OTN nets) frame link, by client traffic port by visitor
Family business is sent to electricity and intersects cell switching unit 103, and electricity intersects the P_1 ports of cell switching unit 103 as the source of business
Port receives the client traffic, and carries out multicast in P_1 ports, and client traffic is sent to P_2 ports and P_3 ports simultaneously,
P_2 ports are connected to the line sharing service port of primary line activities Multiplexing Unit 102, as work by cross-over configuration
Link；P_3 ports are connected to the line sharing service port of extension wire service integration unit 102 by cross-over configuration, as
Protection link, each arrow represents the direction of Business Stream in figure, and where the dotted line signifies that protects the reception direction of link, i.e. Business Stream exists
Received from P_2 ports during active link, received from P_3 ports when link is protected.Received when electricity intersects cell switching unit 103
During to warning information, determine the port of alarm, example occur in client traffic map unit 101 or line activities Multiplexing Unit 102
Such as, if alarm occur in P_2 ports, by the protection where the service switching of the active link where P_2 ports to P_3 ports
In link, i.e., the corresponding link of dotted line in figure.(it is divided into primary and standby with setting two line activities Multiplexing Units 102 in Fig. 2
With) as a example by illustrate, in actual applications, it is also possible to which client traffic map unit 101 is set to two as master
With with it is standby, its implementation is similar with the citing in Fig. 2, is not repeating herein.
Further, in above-mentioned distributed electrical cross system provided in an embodiment of the present invention, the warning information pair of each port
Answer predetermined ad-hoc location in information unit；
Client traffic map unit 101 or line activities Multiplexing Unit 102, the warning information for that will detect are inserted and passed
Send corresponding ad-hoc location in information unit；
Electricity intersects cell switching unit 103, for being determined according to the warning information of ad-hoc location in information unit
The port position for now alerting, corresponding pretection switch operation is carried out according to Preservation tactics.
By the ad-hoc location in the warning information correspondence information unit for predefining each port, and client traffic
Map unit 101 or line activities Multiplexing Unit 102, will be right in warning information insertion information unit after alarm is detected
The ad-hoc location answered, thus, electricity intersects cell switching unit 103 can be according to the alarm letter of ad-hoc location in transmission information unit
Breath, it is determined that there is the port position of alarm, and carries out corresponding pretection switch operation according to Preservation tactics.Accused by this transmission
The mode of alert information, can make electricity intersect the port position that cell switching unit 103 accurately judges alarm occur, find generation
The reason for alarm, so as to be rapidly performed by corresponding pretection switch operation, it is ensured that the promptness and stability of alarm transmission.
Further, in above-mentioned distributed electrical cross system provided in an embodiment of the present invention, taken in information unit
The warning information of each port of band is arranged according to particular order.
Arranged in particular order by the warning information for setting each port carried in information unit, can made
Electricity intersects cell switching unit 103 and more quickly finds the corresponding port position of warning information, and in the specific implementation, this is specific
Order can be the order of port actual arrangement, can be descending order, or order from small to large, certainly
Can also not limited herein for other sequentially.
In the specific implementation, in above-mentioned distributed electrical cross system provided in an embodiment of the present invention, client traffic mapping is single
Unit 101 or line activities Multiplexing Unit 102, for the alarm occurred in each port of real-time detection, and judge the alarm of appearance
Type, the criterion determination according to pretection switch needs the warning information of the port for carrying out alarm status transmission.
For client traffic map unit 101 or line activities Multiplexing Unit 102, service communication link is there may be various
The alarm of various kinds, for example, the line activities Multiplexing Unit 102 for OTN, there may be light-path delivery unit on service link
(Optical channel Transport Unit, OTUk) is alerted, light-path data cell (Optical channel Data
Unit, ODUk) alarm, light-path Payload Unit (Optical channel Payload Unit, OPUk) alarm etc..It is different single
Up to tens of kinds of the alarm species of element module, if the warning information of all of type is all transmitted by overhead bus 104,
The load of overhead bus 104 can be greatly increased, the stability of transmission is reduced, and not all warning information can be triggered
Pretection switch is operated, so also result in unnecessary transmission.Therefore, in actual applications, it is necessary to judge the alarm of appearance
Type, the criterion determination according to pretection switch needs the warning information of the port for carrying out alarm status transmission.Avoid the occurrence of
The warning information of all of alarm be all transmitted by overhead bus 104, therefore, it is possible to reduce the negative of overhead bus 104
Carry, improve transmission rate, it is ensured that the promptness and stability of warning information transmission.
Specifically, in above-mentioned distributed electrical cross system provided in an embodiment of the present invention, above-mentioned warning information can include：
Signal Fail (Signal Failure, SF) warning information and Signal Degrade (Signal Degrade, SD) warning information.
SF warning information and SD warning information are the warning information for being capable of trigger protection switching operation, in practical application,
Client traffic map unit 101 or line activities Multiplexing Unit 102 are detected after alarm, it is necessary to judge the type of alarm, when going out
When existing alarm triggered SD warning information or SF warning information, SD warning information and SF warning information be inserted into transmission information
In unit in corresponding ad-hoc location, cell switching unit 103 is intersected so as to transmit to electricity, electricity intersects cell switching unit 103
After receiving SD warning information and SF warning information, you can the corresponding pretection switch operation of triggering.In actual applications, Ke Huye
Business map unit 101 or line activities Multiplexing Unit 102 can by protect monitoring type configure difference, decide whether to accuse
Alert information is inserted into information unit, e.g., for subnet link protection (subnetwork connection
Protection, SNCP), Inherent monitoring mode is configured to line activities Multiplexing Unit 102, then line activities Multiplexing Unit 102
Detect service port and the announcement such as dropout (Loss Of Signal, LOS), OOF (Loss Of Frame, LOF) occur
When alert, to the underthrust SF warning information of overhead bus 104.
In the specific implementation, in above-mentioned distributed electrical cross system provided in an embodiment of the present invention, overhead bus 104, also
For intersecting between cell switching unit 103 and client traffic map unit 101 in electricity, or intersect cell switching unit in electricity
APS information is transmitted between 103 and line activities map unit；
Information unit carry the port for carrying out APS state transmission in need APS
Information.
According to the difference of protection type, under certain situation, such as when protection structure is 1:N or 1+1 is two-way when switching also
Need transmit APS information, transmission information unit carry the port for carrying out APS state transmission in need it is automatic
Pretection switch information, so as to ensure being smoothed out for automatic protection switching operation.In actual applications, not all port
It is required for carrying out the transmission of APS information, it is possible to which only the port of selection certain number carries out the transmission of APS information.
Specifically, the transfer mode with above-mentioned warning information is similar, and above-mentioned distributed electrical provided in an embodiment of the present invention is handed over
In fork system, predetermined ad-hoc location in the APS information correspondence information unit of each port；
Client traffic map unit 101, line activities Multiplexing Unit 102 or electricity intersect cell switching unit 103, for inciting somebody to action
Corresponding ad-hoc location in APS information insertion information unit, and according to ad-hoc location in information unit
The current state value of APS information determine the APS state of corresponding ports.
In the specific implementation, in above-mentioned distributed electrical cross system provided in an embodiment of the present invention, in information unit
The APS information of carrying is located at after warning information.
Specifically, in above-mentioned distributed electrical cross system provided in an embodiment of the present invention, the corresponding signal in each port loses
Effect warning information and Signal Degrade warning information account for 1 bit respectively, and the APS information of each port takes 4
Byte.
Additionally, information unit can also include, for the neat reserved byte of couple, can carrying out according to actual needs
Set.
Information unit can also include for verify CRC (Cyclic Redundancy Check,
CRC) byte.
Below in conjunction with Fig. 3 and Fig. 4, to the overhead bus 104 in distributed electrical cross system provided in an embodiment of the present invention
Structure illustrate.
Overhead bus 104 include：For the Frame Protocol (Frame that the frame header position for carrying out transmitted data frame is positioned
Protocol, FP) framing holding wire, for carrying out the synchronous clock cable of system clock and for transmitting warning information
Data transfer link.
The two ends of overhead bus 104 can be for example, by by programmable gate array (Field-Programmable Gate
Array, FPGA) physical interface realized realize with client traffic map unit 101, line activities Multiplexing Unit 102 and
Electricity intersects the physical connection of cell switching unit 103.Fig. 3 is the logical schematic of above-mentioned overhead bus 104.
It is FPGA interface by setting the physical interface at the two ends of overhead bus 104, can be produced by way of circuit programming
The time-multiplexed circuit sequence of life, the transmitting warning information by way of the constantly code stream frame signal of transmission rule.Client's industry
Business map unit 101 or line activities Multiplexing Unit 102 are alerted SD and SF using time-multiplexed mode by FPGA interface
It is inserted under information is real-time in circuit time slot, cell switching unit 103 is intersected to transmit to electricity, electricity intersects cell switching unit 103
According to pretection switch algorithm, judge the position of alarm occur, and carry out corresponding pretection switch operation.
Framing holding wire can be specially Frame Protocol (Frame Protocol, FP) framing holding wire, due to overhead bus
104 use time-multiplexed mode, and FP framing holding wires need to carry out frame header position positioning, to complete signal frame identification.Dividing
In cloth electricity cross system, the board of multiple groove positions can be with one group of overhead bus 104 of time division multiplex, i.e., multiple client traffic mappings
Unit 101 and/or multiple line activities Multiplexing Units 102 can share one group of overhead bus 104, and every group of overhead bus 104 connect
Warning information is transmitted to electricity and intersects cell switching unit 103 by all grooves position board for connecing by time-multiplexed mode.And
Every group of overhead bus 104 need to carry out the synchronization of system clock, and clock signal of system line completes the clock of multiple separate units
It is synchronous.Data transfer link can be used to one-way transmission SD warning information or SF warning information.
When overhead bus 104 need transmission APS information, above-mentioned data transfer link is two, for one-way transmission
Warning information, and transmitted in both directions APS information.It is single that the one-way transmission warning information of overhead bus 104 refers to client traffic mapping
Unit 101 or line activities Multiplexing Unit 102 intersect the one-way transmission warning information of cell switching unit 103 to electricity；Overhead bus 104
It is multiple with client traffic map unit 101 or line activities that bi-directionally transmitted APS information refers to electricity intersection cell switching unit 103
APS information can be mutually transferred with unit 102.Electricity intersects cell switching unit 103 and client traffic map unit 101 or circuit
The process of the transmission information of service integration unit 102 is：Client traffic map unit 101 or line activities Multiplexing Unit 102 pass through
FPGA interface using the APS information that time-multiplexed mode transmits SD or SF warning information and opposite equip. it is real-time under be inserted to
In circuit time slot, cell switching unit 103 is intersected to transmit to electricity, electricity intersects cell switching unit 103 to be calculated according to pretection switch
Method, will be inserted to overhead bus 104, by APS information transfers to client traffic map unit 101 or line activities under APS information
Multiplexing Unit 102, then transmit to opposite equip..
In order to reach the pretection switch performance indications (50ms) of carrier class business, overhead bus 104 intersect cell in electricity to be handed over
The FPGA interface of the side of unit 103 is changed, it is necessary to connect the central processing unit (Central that electricity intersects cell switching unit 103
Processing Unit, CPU) external interrupt.When client traffic map unit 101 or line activities Multiplexing Unit 102 pass through
Overhead bus 104 are delivered to the SF warning information or SD warning information bit generating states that electricity intersects cell switching unit 103
Upset when, the FPGA interface that electricity intersects cell switching unit 103 can draw the external interrupt of CPU, in Interrupt Subroutine,
The port numbers that SF warning information or SD warning information are represented are found, and performs pretection switch action accordingly, so as to complete protection
The operation switched.
Specifically, in order to further illustrate the process that above-mentioned warning information is transmitted, how introduced below by way of example will produce
Raw warning information is transmitted to electricity and intersects cell switching unit.
Embodiment one：
In order to realize the transmission of warning information, the information unit for transmitting warning information is pre-set, and passing
Send the definition of each field in information unit as shown in Figure 5 a；
Wherein, above-mentioned information unit includes：Warning information (SF warning information and SD warning information), wherein：SF is accused
Alert information, SD warning information respectively account for a bit, i.e., one byte can transmit 4 groups of SF or SD warning information, as shown in Figure 5 a,
The warning information carried with n byte, thus, what can essentially be carried is 4n SF warning information or the SD alarm of port
Information；4n port herein can be to carry out client traffic map unit 101 that warning information reports or line activities is multiple
With the port number of unit 102；It can certainly be the port of client traffic map unit 101 or line activities Multiplexing Unit 102
Sum；Selected quantity determines according to system setting.
Further, above-mentioned warning information includes that the SF warning information and SD of each port arranged according to port order are alerted
Information, simply one kind shown in Fig. 5 a puts in order, and actually can also be first to carry whole SF according to port order to accuse
Alert information, then carry whole SD warning information；Or according between multiple ports or carry other put in order to carry each end
The SF warning information and SD warning information of mouth；And for port order can be can also be from big to small from small to large or
Certain specific setting, is not defined to putting in order for warning information herein, only for each port SF warning information and
The shared bit in whole information unit of SD warning information needs to predefine.
APS information can also be included in information unit, in fig 5 a, APS takes k byte, wherein, due to logical
Often the complete APS unit informations of statement one need 4 bytes, therefore, if it is desirable to the APS of 4n port of report and alarm information
Information, then byte number required herein be：K=16n.It should be noted that APS information is not to need all of the port will
Transmitted, can only select the port of certain number to carry out APS information transmissions, thus, k herein can also be according to reality
Needs are determined.
Further, the reserved bit RES1 after warning information, the reservation can also be set in information unit
Position is alignd increased reserved byte for total amount of byte even number, and the field can be selected rather than simultaneously option according to product actual conditions,
And total amount of byte even number is alignd can be easy to subsequent treatment.
Further, reserved bit RES2 can also be set in information unit, the reserved bit can also be arranged on APS letters
After breath for total amount of byte even number align and increased reserved byte；
Further, CRC (Cyclic Redundancy can also be increased in information unit
Check, CRC) check bit, typically, using 2 bytes.
Therefore, it can according to the client traffic map unit 101 or circuit for carrying out alerting transmission the need in whole system
The port number of service integration unit 102 determines the data form of information unit, and sets according to a predetermined sequence each
The position of port warning information and APS information in information unit, thus, can utilize each ratio in information unit
Special position determines the corresponding relation of each port and warning information state value with the corresponding relation of each port, i.e.,：The alarm letter of each port
The corresponding relation of breath and APS information position and each informational status values in delivery unit.
Based on the data structure of information unit defined above, to electric cross system provided in an embodiment of the present invention
In, completion includes that warning information and APS information transmissions and the flow switched are illustrated：
Step one：System machine frame electrifying startup, client traffic map unit, line activities Multiplexing Unit and electricity intersect letter
First crosspoint completes electricity on hardware system, and software systems initialization, and the software initialization includes：Memory headroom application,
The operations such as semaphore foundation, also include：Know and existed according to the warning information and APS information of system configuration each port set in advance
The corresponding relation of position and informational status values in information unit, port herein includes：Panel terminal port and backboard port；
Step 2：Electricity intersects cell switching unit issuees a notice to client traffic map unit and line activities Multiplexing Unit
Message (message can be ether data packet format of the prior art), request client traffic map unit and line activities are multiple
Needs are reported with unit alert the port informations such as port number, the position of transmission.
Step 3：After client traffic map unit, line activities Multiplexing Unit receive the notice message in step 2, will be each
Client traffic map unit and line activities Multiplexing Unit need the port information for alert transmission to write the notice message
In response message, sent to electricity as the response message of notice message and intersect cell switching unit, electricity intersects cell switching unit
Obtain the port information for needing to carry out alerting transmission in each client traffic map unit and line activities Multiplexing Unit；
For above-mentioned steps three it should be noted that：In step one configuration preset each port warning information and
APS information when the position in information unit is directed to system design it is all of there may be port for, it needs all
It is all known that client traffic map unit, line activities Multiplexing Unit and electricity intersect cell switching unit；But electricity in step 3
The port information for intersecting the acquisition of cell switching unit can be the port information for being currently needed for obtaining warning information and APS information,
Its warning information for being not necessarily all of the port, it is need that now can select whole ports or section ports according to design requirement
Alert the port of transmission, the mode for determining the need for carrying out port alarm transmission is not defined herein.
The step of by the above one, arrives step 3, and client traffic map unit, line activities Multiplexing Unit there is known this
The position transmitted in information unit is inserted under the port warning information and APS information on ground；And electricity intersects cell switching unit
The port corresponding to each position in information unit is there is known, it can carry out what warning information transmission judged as following
Basis.
Step 4：Client traffic map unit, line activities Multiplexing Unit and electricity intersect cell switching unit on electricity simultaneously
After runtime software, the FPGA interface at overhead bus two ends starts constantly to send code stream as shown in Figure 4 in physical layer, should
Each data area of code stream corresponds to 1 bit (Bit) position respectively, after being positioned by locating frame head in code stream transmit process,
There is end in port warning information and APS information, position corresponding with the port in code stream will be inserted under warning information or APS information
In putting, and used as warning information and APS information receiving ends, when receiving code stream information, the state value in code stream Bit is just
The warning information and APS information of each port can respectively be determined.
In step 4, according to normal condition or alarm status in the corresponding position underthrust state value in port, receive
Code stream in each bit state for port current state, by its with preset normal condition compared with by judge
Whether port is normal, for example, can show normal as 0 with preset condition, state shows alarm for 1；And for APS information,
Information can be obtained by continuous 4 bytes, no longer described in detail herein.
For step 4 it should be noted that being supervised for the protection of client traffic map unit and line activities Multiplexing Unit
Control type, that is, needing the alarm type of report and alarm state can preset, and client traffic map unit and line activities are multiple
Produced to alarm with unit monitors, according to the type of alarm, it is determined whether the ad-hoc location underthrust SF warning information in code stream
Or SD warning information.
It is unidirectional for the transmission of port warning information (SF, SD warning information) in step 4, that is, only exists visitor
Family business map unit or line activities Multiplexing Unit intersect the unidirectional information transmission of cell switching unit, thus, port to electricity
The generation end of warning information is client traffic map unit or line activities Multiplexing Unit, and receiving terminal intersects cell switching for electricity
Unit.But it is two-way for the transmission of APS information, i.e., client traffic map unit, line activities Multiplexing Unit are handed over electricity
Fork cell switching unit can be with twocouese interaction transmission APS information, on the one hand, client traffic map unit or line activities are multiple
After the APS information of opposite equip. transmission in network is received with unit, it is multiplexed by client traffic map unit or line activities
It is inserted under unit is real-time in corresponding code stream time slot, is resent to electricity and intersects cell switching unit；On the other hand, electricity intersects cell
Crosspoint according to pretection switch algorithm, by the code stream time slot of APS information underthrust overhead bus, and can be sent out by overhead bus
Client traffic map unit or line activities Multiplexing Unit are delivered to, by client traffic map unit or line activities Multiplexing Unit again
It is sent to opposite equip.；Now, client traffic map unit, line activities Multiplexing Unit intersect cell switching unit not with electricity
Generation end or the receiving terminal of APS information can be all each acted as in the case of.
Step 5：Electricity intersects cell switching unit carries out pretection switch according to the protection software decision-making algorithm being pre-configured with,
Connected with client traffic map unit port and with the port of line activities Multiplexing Unit according to protection decision-making realization.
For step 5 it should be noted that：When client traffic passes through active link, default information unit
Acquiescence normal value in data frame during all system electrification of corresponding bit, such as it is 0 to give tacit consent to normal value, and electricity intersects cell
Alarm status value in the code stream Zhong Ge data areas that crosspoint is received from overhead bus, shows that SF occurs in the absence of port accuses
Alert information or SD alarms.When working service link fails, such as there is fiber cut failure in the port of line activities Multiplexing Unit,
Then line activities Multiplexing Unit business chip can read LOS alarms, according to the port that LOS alarms occur, by by the end
In corresponding code stream bit being inserted under the warning information of mouth (i.e.：Change the state value of the bit), from there through overhead bus
Warning information is delivered to electricity and intersects cell switching unit, CPU can be looked for by external interrupt during electricity intersects cell switching unit
Occur the port of LOS alarms to line activities Multiplexing Unit, the port traffic is switched to protection link.This completes once
Pretection switch is operated.
For above-mentioned alarm transmission and pretection switch it should be added that：
(1) above-mentioned distributed electrical cross system is the system for being configured with electric cross protection, for not configuring electric intersection
During protection, although SF warning information or SD warning information can also be sent to electricity and intersect cell switching unit, electricity intersects letter
First crosspoint can't carry out any treatment.
(2) the protection type of electric cross system can include linear protection, looped network protection, the subnet link protection of transmission net
Deng, particular determination is not made, the configuration of the protection type typically can issue realization by webmaster, but also be not excluded for this area
The known other modes of those of ordinary skill, and for electricity intersect cell switching unit according to protection decision-making and realize and client
Business map unit port and connected with the port of line activities Multiplexing Unit can also be using mode of the prior art come real
Existing, here is omitted.
(3) as long as actually can be according to information unit for the information unit mentioned in above-described embodiment
In bit determine port and corresponding status information, the field of warning information and APS information for port is being passed
Sending the position in information unit can not also limit, in the present embodiment by the way of class multi-frame, first by all of the port
Port warning information has all been transmitted, then transmits APS information, this ensure that the port alarm letter transmitted in units of Bit
Breath (including SF, SD warning information) and the APS information transmitted in units of byte can be by words in transmission information process is carried out
Section alignment, is easy to subsequent treatment, and believe being related to all bits in the byte of port alarm to express SF, SD alarm
Breath, improves transmission efficiency.
Above-mentioned distributed cross system provided in an embodiment of the present invention, by using overhead bus transmitting warning information, by
Time-multiplexed rigid conduit is based in overhead bus, and is not take up wireless network, without using complicated procotol, make announcement
Alert information is only operated in physical layer, and electricity intersects the code stream frame that cell switching unit only needs to read overhead bus transmission, without right
Overhead bus are intervened, it is ensured that the promptness and stability of overhead bus transmitting warning information.
Embodiment two：
Compared with embodiment one, when only needing to carry out the transmission of warning information in distributed cross system, and without transmission
During APS information, the data frame format of default information unit can be simplified, as shown in Figure 5 b.
The data frame format of the information unit proposed using the present embodiment two carries out the transmission of port warning information
And reversed process is similar with embodiment one, it is not related to the transmission of APS information simply, will not be repeated here.
Based on same inventive concept, the alarm that the embodiment of the present invention additionally provides a kind of above-mentioned distributed electrical cross system is passed
Method is passed, because the principle of the alarm transmission method solve problem is similar to above-mentioned distributed electrical cross system, therefore the alarm
The implementation of transmission method may refer to the implementation of above-mentioned distributed electrical cross system, repeats part and repeats no more, as shown in fig. 6,
The alarm transmission method includes：
When S201, multiple client traffic map units or multiple line activities Multiplexing Units are used by overhead bus respectively
The mode of multiplexing is divided to intersect cell switching unit transmitting warning information to electricity；Overhead bus are with the number of specific information unit
According to frame format transmitting warning information, and information unit carries institute's client traffic for carrying out alarm status transmission in need and maps
The warning information of the port of unit or line activities Multiplexing Unit；
S202, electricity intersect cell switching unit according to the client traffic map unit or line activities Multiplexing Unit for receiving
Warning information, carry out corresponding pretection switch operation according to Preservation tactics.
Further, in above-mentioned alarm transmission method provided in an embodiment of the present invention, the process of alarm status transmission is specific
Including (not shown)：
The warning information insertion transmission information that S301, client traffic map unit or line activities Multiplexing Unit will be detected
Corresponding ad-hoc location in unit；
S302, electricity intersect cell switching unit and determine occur accusing according to the warning information of ad-hoc location in information unit
Alert port position, corresponding pretection switch operation is carried out according to Preservation tactics.
Further, in above-mentioned alarm transmission method provided in an embodiment of the present invention, before above-mentioned steps S301, also wrap
Include (not shown)：
Ad-hoc location in S300, the warning information correspondence information unit of predetermined each port.
In practical application, it is necessary to carry out alarm status biography in above-mentioned alarm transmission method provided in an embodiment of the present invention
The warning information of the port passed, determines in the following manner：
The alarm occurred in client traffic map unit or each port of line activities Multiplexing Unit real-time detection, and judge
The type of existing alarm, the criterion according to pretection switch determines to need the alarm of the port for carrying out alarm status transmission to believe
Breath.
In the specific implementation, in above-mentioned alarm transmission method provided in an embodiment of the present invention, also include：
Overhead bus intersect between cell switching unit and client traffic map unit in electricity, or intersect cell friendship in electricity
Change transmission APS information between unit and line activities map unit；
Information unit carry the port for carrying out APS state transmission in need APS
Information.
Specifically, in above-mentioned alarm transmission method provided in an embodiment of the present invention, APS information is transmitted across
Journey is specifically included：
Client traffic map unit, line activities Multiplexing Unit or electricity intersect cell switching unit believes APS
Corresponding ad-hoc location in breath insertion information unit, and according to the APS of ad-hoc location in information unit
The current state value of information determines the APS state of corresponding ports.
Distributed electrical cross system provided in an embodiment of the present invention and its alarm transmission method, multiple client traffic mappings are single
Unit or multiple line activities Multiplexing Units intersect cell switching unit and pass using time-multiplexed mode by overhead bus to electricity
Defeated warning information, the pretection switch for being responsible for whole distributed electrical cross system by electricity intersection cell switching unit is operated, and is conducive to
The quick treatment of warning information；Overhead bus with the data frame format transmitting warning information of specific information unit, and
The information unit carry institute the warning information for carrying out alarm status transmission in need, electricity intersection cell switching unit can lead to
The warning information for receiving is crossed, corresponding pretection switch operation is carried out according to Preservation tactics.Compared to use in the prior art with
The too other technologies such as net transmit warning information, distributed electrical cross system provided in an embodiment of the present invention, using time-multiplexed
Overhead bus carry out alarm transmission, it is not necessary to complicated procotol, can be protected on the basis of system operation load is not increased
Stability, timely row and reliability that card alarm is transmitted.
Obviously, those skilled in the art can carry out various changes and modification without deviating from essence of the invention to the present invention
God and scope.So, if these modifications of the invention and modification belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising these changes and modification.
Claims (17)
1. a kind of distributed electrical cross system, it is characterised in that including：Multiple client traffic map units, multiple line activities
Multiplexing Unit, at least one electricity intersect cell switching unit and for transmitting multiple clients using time-multiplexed mode
The overhead bus of the warning information of business map unit or multiple line activities Multiplexing Units；
The overhead bus transmit the warning information, and the transmission letter with the data frame format of specific information unit
Interest statement unit carry institute the client traffic map unit for carrying out alarm status transmission in need or the line activities multiplexing singly
The warning information of the port of unit；
The electricity intersects cell switching unit, for according to the client traffic map unit or the line activities for receiving
The warning information of Multiplexing Unit, corresponding pretection switch operation is carried out according to Preservation tactics.
2. the system as claimed in claim 1, it is characterised in that the warning information correspondence transmission information list of each port
Predetermined ad-hoc location in unit；
The client traffic map unit or the line activities Multiplexing Unit, the warning information insertion for that will detect are described
Corresponding ad-hoc location in information unit；
The electricity intersects cell switching unit, for being determined according to the warning information of ad-hoc location in the information unit
The port position for now alerting, corresponding pretection switch operation is carried out according to Preservation tactics.
3. system as claimed in claim 2, it is characterised in that the alarm letter of each port carried in the information unit
Breath is arranged according to particular order.
4. the system as claimed in claim 1, it is characterised in that the client traffic map unit or the line activities are multiplexed
Unit, in each port of real-time detection occur alarm, and judge occur the alarm type, according to pretection switch
Criterion determination needs the warning information of the port for carrying out alarm status transmission.
5. the system as described in claim any one of 1-4, it is characterised in that described warning information includes：Signal Fail is accused
Alert information and Signal Degrade warning information.
6. system as claimed in claim 5, it is characterised in that the overhead bus, is additionally operable to intersect cell in the electricity and hands over
Change between unit and the client traffic map unit, or reflected in the electricity intersection cell switching unit and the line activities
Penetrate transmission APS information between unit；
The information unit carry the port for carrying out APS state transmission in need APS
Information.
7. system as claimed in claim 6, it is characterised in that the APS information correspondence biography of each port
Send predetermined ad-hoc location in information unit；
The client traffic map unit, the line activities Multiplexing Unit or the electricity intersect cell switching unit, for inciting somebody to action
The APS information inserts corresponding ad-hoc location in the information unit, and according to the transmission information list
The current state value of the APS information of ad-hoc location determines the APS state of corresponding ports in unit.
8. system as claimed in claim 7, it is characterised in that the automatic protection carried in the information unit is fallen
Information is changed to be located at after the warning information.
9. system as claimed in claim 6, it is characterised in that the corresponding Signal Fail warning information in each port and institute
State Signal Degrade warning information and account for 1 bit respectively, the APS information of each port takes 4 bytes.
10. system as claimed in claim 9, it is characterised in that the information unit is also included for neat pre- of couple
Write down characters section.
11. systems as claimed in claim 10, it is characterised in that the information unit also includes the circulation for verifying
Redundancy check byte.
A kind of 12. alarm transmission methods of the distributed electrical cross system based on described in claim any one of 1-11, its feature
It is, including：
Multiple client traffic map units or multiple line activities Multiplexing Units are respectively by overhead bus using time-multiplexed
Mode intersects cell switching unit transmitting warning information to electricity；The overhead bus are with the data frame of specific information unit
Warning information described in format transmission, and the information unit carry the client for carrying out alarm status transmission in need
The warning information of the port of business map unit or the line activities Multiplexing Unit；
The electricity intersects cell switching unit and is multiplexed according to the client traffic map unit for receiving or the line activities
The warning information of unit, corresponding pretection switch operation is carried out according to Preservation tactics.
13. methods as claimed in claim 12, it is characterised in that the process of the alarm status transmission is specifically included：
The warning information that the client traffic map unit or the line activities Multiplexing Unit will be detected inserts the transmission
Corresponding ad-hoc location in information unit；
The electricity intersects cell switching unit and determines occur accusing according to the warning information of ad-hoc location in the information unit
Alert port position, corresponding pretection switch operation is carried out according to Preservation tactics.
14. methods as claimed in claim 13, it is characterised in that in the client traffic map unit or the line activities
In the warning information insertion information unit that Multiplexing Unit will be detected before corresponding ad-hoc location, also include：
Predefine the ad-hoc location in the warning information correspondence information unit of each port.
15. methods as claimed in claim 12, it is characterised in that the alarm of the port for needing to carry out alarm status transmission
Information, determines in the following manner：
The alarm occurred in the client traffic map unit or each port of line activities Multiplexing Unit real-time detection, and sentence
The type of the disconnected alarm for occurring, the criterion according to pretection switch determines to need to carry out the port of alarm status transmission
Warning information.
16. methods as claimed in claim 12, it is characterised in that also include：
Overhead bus intersect between cell switching unit and the client traffic map unit in the electricity, or are handed in the electricity
APS information is transmitted between fork cell switching unit and the line activities map unit；
The information unit carry the port for carrying out APS state transmission in need APS
Information.
17. methods as claimed in claim 16, it is characterised in that the transmitting procedure of the APS information is specifically wrapped
Include：
The client traffic map unit, the line activities Multiplexing Unit or the electricity intersect cell switching unit will it is described from
Dynamic pretection switch information inserts corresponding ad-hoc location in the information unit, and according to special in the information unit
The current state value of the APS information that positioning is put determines the APS state of corresponding ports.
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Address after: 100094 First to Fifth Floors of Building 11, East Yard, No. 10 Wangdong Road, Northwest Haidian District, Beijing Applicant after: RAISECOM TECHNOLOGY Co.,Ltd. Address before: 100085 No. 2 Building, No. 28 Shangdi Sixth Street, Haidian District, Beijing Applicant before: RAISECOM TECHNOLOGY Co.,Ltd. |
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Application publication date: 20170531 |