CN102845102B - Transmission equipment, transfer approach and computer program - Google Patents
Transmission equipment, transfer approach and computer program Download PDFInfo
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- CN102845102B CN102845102B CN201180018771.8A CN201180018771A CN102845102B CN 102845102 B CN102845102 B CN 102845102B CN 201180018771 A CN201180018771 A CN 201180018771A CN 102845102 B CN102845102 B CN 102845102B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 130
- 238000004590 computer program Methods 0.000 title description 3
- UIIMBOGNXHQVGW-UHFFFAOYSA-M buffer Substances [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims abstract description 44
- 230000001052 transient Effects 0.000 claims abstract description 4
- 238000011084 recovery Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 description 60
- 238000004891 communication Methods 0.000 description 26
- 210000003311 CFU-EM Anatomy 0.000 description 16
- 238000001514 detection method Methods 0.000 description 14
- 238000009825 accumulation Methods 0.000 description 9
- 230000003139 buffering Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 235000013772 propylene glycol Nutrition 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
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Abstract
Flow control can be performed for each teleservice.A kind of transmission equipment, including: receive buffer, the delivery unit data of temporary transient accumulative reception；Signal generator divides, it is configured to: when the cumulant in receiving buffer exceedes predetermined upper limit threshold, produce control signal, described control signal indicates: is appointed as sending destination by another transmission equipment of the sending side end points of the business of delivery unit data that will act as being received by himself equipment, stops the transmission of delivery unit data；And transmitting portion, it is configured to send described control signal.
Description
Technical field
The present invention relates to the transmission for control protocol data cell (PDU) (such as packet or frame)
Technology.
Background technology
In association area, it is proposed that use Ethernet (registered trade mark) fortune in packet transmission networks
Seek, manage and safeguard that (OAM) frame performs to safeguard or the technology (seeing patent documentation 1) of management.
Additionally, in packet transmission networks, perform Control on Communication, as separated with above-mentioned maintenance or management
Flow control.Specifically, when must construct there is no packet loss Ethernet (registered trade mark) environment (as
Data center or storage area network (SAN)) time, generally use flow control.When at group transmission network
When network performs flow control, in units of physical port, priority groups etc., perform control.
In the control in units of physical port, with IEEE (IEEE) 802.3
The physical port of definition is that unit is to perform flow control.Specifically, when in the buffer receiving side
Surplus when having the capacity that be enough to process business, send pause frame, to temporarily cease transmission from receiving side
The data transmission of side.Additionally, in the control in units of priority groups, by by similarity priority
Level distributes to each business in same physical port, carrys out execution priority flow control.Priority flow
Controlling defined in IEEE 802.1Qbb, the purpose that priority flow controls is to ensure that service quality
(QoS).In priority flow control, perform flow control with individual priorities.
[prior art literature]
[patent documentation]
[patent documentation 1] Japanese Unexamined Patent Application, applies for No.2007-536878 first
Summary of the invention
Problem to be solved
But, in the flow control of association area, there is problems with.With physical port as list
In the flow control of position, when occurring congested in specific transactions, at the physics chain accommodating multiple business
Road temporarily ceases the transmission of all business in same physical link.That is, with physical port it is being
In the flow control of unit, in units of physical link, send/receive pause frame.Therefore, when one
When port includes multiple business, if occurring congested in specific transactions, then temporarily cease identical
The transmission of all business in port.
Additionally, priority flow controls the flow control being implemented as every 8 priority.Therefore,
If occurring congested in specific transactions, then temporarily cease and belong to identical excellent with there is congested business
The transmission of all business of first level.Additionally, priority flow controls to be the control in units of jumping.Cause
This, in priority flow control, the independent flow control of the business between unrealized end points.
If as it has been described above, use the flow control of IEEE definition in the network including multiple business,
The unrealized independent flow control for each business.
Being made that the present invention in view of above-mentioned situation, it is an object of the invention to provide can be for each
Teleservice performs the technology of flow control.
The scheme of solution problem
According to an aspect of the present invention, it is provided that a kind of transmission equipment, including: receive buffer,
The temporarily delivery unit data of accumulative reception；Signal generator divides, the accumulation in receiving buffer
When amount exceedes predetermined upper limit threshold, producing control signal, described control signal indicates: by using
Another of the sending side end points of the business of the delivery unit data that work to be received by himself equipment transmits
Equipment is appointed as sending destination, stops the transmission of described delivery unit data；And sending part
Point, send described control signal.
According to a further aspect in the invention, it is provided that a kind of sending method, including: signal produces step
Suddenly, by having the transmission equipment receiving buffer of the delivery unit data of temporary transient accumulative reception,
Cumulant in receiving buffer produces control signal, described control when exceeding predetermined upper limit threshold
Signal designation: by sending out of the business of delivery unit data that will act as being received by himself equipment
Another transmission equipment sending side point is appointed as sending destination to stop described delivery unit data
Send；And forwarding step, send described control signal by described transmission equipment.
According to a further aspect in the invention, it is provided that a kind of computer program, it is used for making having temporarily
The transmission equipment receiving buffer of the delivery unit data of accumulative reception performs: signal produces step,
When cumulant in receiving buffer exceedes predetermined upper limit threshold, produce control signal, described control
Signal designation processed: by the business of delivery unit data that will act as being received by himself equipment
Another transmission equipment of sending side end points is appointed as sending destination to stop described delivery unit data
Transmission；And forwarding step, send described control signal by described transmission equipment.
The effect of the present invention
According to the present invention it is possible to perform flow control for each teleservice.
Accompanying drawing explanation
Fig. 1 is the system layout of the system configuration illustrating packet delivery system.
Fig. 2 A is the packet transmission diagrammatically illustrating and being communicatively connected to multiple packet transfer device 10
The figure of the configuration of equipment 10.
Fig. 2 B is to diagrammatically illustrate to be communicatively connected to a packet transfer device 10 and communicate with multiple
The figure of the configuration of the packet transfer device 10 of terminal 20.
Fig. 3 is the figure of the concrete configuration example illustrating packet transfer device.
Fig. 4 is the schematic block diagram of the functional configuration illustrating transmission/reception control section.
Fig. 5 is the figure of the concrete example of the form illustrating OAM frame.
Fig. 6 is the flow chart illustrating the handling process when having been received by receiving packet.
Fig. 7 is the flow process illustrating the handling process relevant to the supervision process of congestion detection part
Figure.
Detailed description of the invention
Fig. 1 is the system layout of the system configuration illustrating packet delivery system 1.Packet transmits
System 1 uses multiple packet transfer device 10-1 to 10-8 and multiple communication terminal 20 to configure.
Each packet transfer device 10 radio communication is connected to another specific cluster and transmits equipment, and send/
Receive packet.In the case of figure 1, packet transfer device 10-1,10-2 and 10-4 radio communication
It is connected to packet transfer device 10-3.Additionally, packet transfer device 10-3,10-5 and 10-6 without
Line is communicatively connected to packet transfer device 10-4.Additionally, packet transfer device 10-4 and 10-7 without
Line is communicatively connected to packet transfer device 10-5.Additionally, packet transfer device 10-4 and 10-8 without
Line is communicatively connected to packet transfer device 10-6.Additionally, multiple communication terminals 20 are communicatively connected to
Packet transfer device 10-1,10-2 and 10-7.
Pre-set business in packet delivery system 1.In the case of figure 1, business 31 is arranged to
Teleservice between packet transfer device 10-1 and 10-7.That is, business 31 be arranged to from
Packet transfer device 10-1 sends to being grouped biography via packet transfer device 10-3,10-4 and 10-5
Send the business of equipment 10-7.Additionally, business 32 is arranged to packet transfer device 10-2 and 10-6
Between teleservice.That is, business 32 is arranged to from packet transfer device 10-2 via dividing
Group transmission equipment 10-3 and 10-4 sends the business to packet transfer device 10-6.Such as, in industry
Be engaged in 31 and business 32 in send from communication terminal 20 send data.In the case of figure 1, divide
Physical link between group transmission equipment 10-3 and 10-4 accommodates business 31 and business 32.As above institute
Stating, the packet delivery system 1 shown in Fig. 1 has the physical link accommodating multiple business.
In packet delivery system 1, the maintenance entity of Ethernet (registered trade mark) OAM is set
Group end points (MEP) and Maintenance Entity intermediate point (MIP).Such as, in the case of figure 1,
Packet transfer device 10-1,10-2,10-6 and 10-7 are arranged to MEP.Additionally, packet passes
Equipment 10-3,10-4 and 10-5 is sent to be arranged to MIP.
Specifically, identical MEP (MEP is set for packet transfer device 10-1 and 10-7
ID=A).Additionally, arrange identical MEP (MEP for packet transfer device 10-2 and 10-6
ID=B).Additionally, arrange in packet transfer device 10-3 and 10-4 between MEP
MIP (MEP ID=A, B).Additionally, in the packet transfer device 10-5 between MEP
MIP (MEP ID=A) is set.
MEP and MIP provided as before so that between packet transfer device 10-1 and 10-7
And each business between packet transfer device 10-2 and 10-6 sends single OAM frame.
In packet delivery system 1, when setting in the packet transmission receiving side being arranged to MEP
When standby 10 (being packet transfer device 10-6 and 10-7 in the case of figure 1) occur congested,
Receive packet transfer device 10 from the packet transfer device 10 of side to the end points as sending side (
It is packet transfer device 10-1 and 10-2 in the case of Fig. 1) send OAM flow control frame 61.?
In packet delivery system 1, realize as described above by sending/receive OAM flow control frame 61
Flow control.In packet delivery system 1, the equipment as the end points of sending side is only grouped transmission
Equipment 10, the communication terminal 20 producing user data is not used as the end points of sending side.
The configuration of the packet delivery system 1 shown in Fig. 1 is only an example.Can compatibly change
The number of packet transfer device 10 of offer, annexation, service path in packet delivery system 1
Etc..Furthermore, it is possible to compatibly change the packet transfer device 10 being arranged to MEP or MIP.
Additionally, replace multiple communication terminal 20, a communication terminal 20 can be connected to packet and transmit
Equipment 10.Additionally, packet transfer device, another communication equipment or communication terminal 20 (not shown)
May also connect to each packet transfer device 10-1 to 10-8.
Fig. 2 A is the packet transmission diagrammatically illustrating and being communicatively connected to multiple packet transfer device 10
The figure of the configuration of equipment 10.In the case of figure 2 a, packet transfer device 10 includes multiple sky
Line part 11, multiple transmission/reception control section 12 and Relay Control Portion 13.
Antenna part 11 is to/from the antenna of another packet transfer device 10 being connected with its radio communication
Part 11 sends/receives wireless signal.Antenna part 11 is to another point being connected with its radio communication
The antenna part 11 of group transmission equipment 10 sends and to receive it from transmission/reception control section 12
The packet (referred to herein as " sending packet ") of rear transmission.Additionally, antenna part 11 is from wireless with it
The antenna part 11 of another packet transfer device 10 of communication connection receives packet, and by this packet
(packet (hereinafter referred to as receiving packet) hereinafter referred to as received) is transferred to send/receive control portion
Divide 12.
Transmission/reception control section 12 determines reception packet, and performs OAM process etc..?
When antenna part 11 receives general packet as reception packet, transmission/reception control section 12
Reception packet is transferred to Relay Control Portion 13.General packet is the packet of non-OAM frame, example
The packet of user data in this way.Additionally, set to himself receiving non-addressed from antenna part 11
Standby OAM frame is as when receiving packet, and transmission/reception control section 12 is by reception packet transmission
To Relay Control Portion 13.Additionally, when receiving transmission packet from Relay Control Portion 13,
Transmission/reception control section 12 sends packet via antenna part 11.
Relay Control Portion 13 is based on the head receiving packet received from transmission/reception control section 12
Portion's information etc. performs relay processes.The relay processes that Relay Control Portion 13 is to be performed is to use
Prior art realizes.
Fig. 2 B is to diagrammatically illustrate to be communicatively connected to a packet transfer device 10 and communicate with multiple
The figure of the configuration of the packet transfer device 10 of terminal 20.In the case of fig. 2b, packet transmits
Equipment 10 includes antenna part 11, transmission/reception control section 12 and Relay Control Portion 14.
Antenna part 11 in Fig. 2 B and the configuration of transmission/reception control section 12 and the sky in Fig. 2 A
Line part 11 is identical with the configuration of transmission/reception control section 12.Relay Control Portion 14 with in
The difference of the control part 13 that continues is to set up the connection with multiple communication terminals 20.Relay and control portion
14 are divided to perform relay processes based on header message of packet received from communication terminal 20 etc..
Additionally, Relay Control Portion 14 is based on the reception packet received from transmission/reception control section 12
Header message etc. performs relay processes.The relay processes that Relay Control Portion 14 is to be performed is to make
Realize by prior art.
Fig. 3 is the figure of the concrete configuration example illustrating packet transfer device 10-3.Such as, such as figure
Shown in 3, multiple antenna part 11 or an antenna part 11 can be connected to packet transfer device
The transmission/reception control section 12 of 10.In the context of fig. 3, it is used for and packet transfer device 10-1
Antenna part 11-1 of radio communication and for the antenna with packet transfer device 10-2 radio communication
Part 11-2 is connected to transmission/reception control section 12-1 of packet transfer device 10-3.Additionally,
Set for being connected to be grouped transmission with antenna part 11-3 of packet transfer device 10-4 radio communication
Transmission/reception control section 12-2 of standby 10-3.Each antenna part 11 can be configured with
Have highly directive radio wave (such as microwave) come with towards antenna part 11 dispose another
Antenna part 11 radio communication.
Fig. 4 is the schematic block diagram of the functional configuration illustrating transmission/reception control section 12.Send/
Receive the CPU (CPU), memorizer, auxiliary controlling part 12 and including being connected by bus
Secondary storage device etc., and perform transmission/receiving control program.Transmission/reception control section 12 is led to
Cross execution transmission/receiving control program, as including following equipment: packet receiving portion 121,
Packet filter 122, OAM process part 123, transmission control unit divides 124, receives to be grouped and delay
Rush device 125, congestion detection part 126, OAM generation part 127, send packet buffer 128
And packet transmission part 129.All or some function of transmission/reception control section 12 can make
Realize with hardware, as special IC (ASIC), PLD (PLD) and
/ or field programmable gate array (FPGA).Transmission/receiving control program can record at computer
On readable medium recording program performing.The example of computer readable recording medium storing program for performing is floppy disk, magnetooptical disc, read-only deposits
Reservoir (ROM), pocket memory, such as compact disc-ROM (CD-ROM), or storage
Equipment, such as the hard disk in embeded computer system.Additionally, transmission/reception control section 12 carries
The all or part hardware of confession, such as CPU or memorizer, can be by Relay Control Portion 13 or another
One transmission/reception control section 12 is shared.
When receiving reception packet from antenna part 11, packet receiving portion 121 performs to receive
Journey, and reception packet is sent to packet filter 122.
Packet filter 122 determines whether reception packet is OAM frame.If receiving packet it is
OAM frame, then reception packet is transferred to OAM and processes part 123 by packet filter 122.Separately
On the one hand, if receiving packet is not OAM frame, then reception packet is passed by packet filter 122
It is handed to receive packet buffer 125.
When receiving reception packet from packet filter, OAM processes part 123 and determines reception
Whether packet (OAM frame) is OAM flow control frame 61.If OAM frame is OAM stream control
Frame 61 processed, then OAM processes part 123 and OAM flow control frame 61 is transferred to transmission control unit
Divide 124.On the other hand, if OAM frame is not OAM flow control frame 61, then OAM process
Part 123 performs OAM process based on OAM frame.It is to be performed that OAM processes part 123
OAM process uses prior art to realize.
Transmission control unit divides 124 according to the flow control time arranged in OAM flow control frame 61, general
Send control signal output to sending packet buffer 128.
Receive packet buffer 125 the reception packet received from packet filter 122 is buffered.
Reception packet buffer 125 is according to predetermined timing or the control of Relay Control Portion 14, by reception point
Group output is to Relay Control Portion 14.
Congestion detection part 126 monitors the accumulation grouping number receiving packet buffer 125.If
The accumulation grouping number receiving packet buffer 125 exceedes predetermined upper limit threshold, then congestion detection portion
126 are divided to produce part 127 output for the OAM generation control signal stopped to OAM.With
Producing control signal in the OAM stopped is that instruction produces for stopping the OAM flow control sent
The signal of frame 61.If additionally, receiving the accumulation grouping number of packet buffer 125 less than predetermined
Lower threshold, then congestion detection part 126 produces part 127 output for recovery to OAM
OAM produces control signal.It is that instruction produces for sending out that OAM for recovering produces control signal
Send the signal of the OAM flow control frame 61 of recovery.Designer or manager are suitably configured upper limit threshold
Value and lower threshold.Such as, designer or manager are communicatively connected to packet transmission by operation and set
Another terminal unit of standby 10, changes the setting of upper limit threshold or lower threshold.
OAM produces part 127 and produces OAM flow control frame according to OAM generation control signal
61, and produced OAM flow control frame 61 is exported to sending packet buffer 128.
If receiving transmission packet from Relay Control Portion 14, then send packet buffer 128
Buffering sends packet.If additionally, producing part 127 from OAM to receive OAM flow control frame
61, then send packet buffer 128 and buffer OAM flow control frame 61.Send packet buffer 128
The transmission packet buffered to packet transmission part 129 output according to pre-defined rule or OAM stream control
Frame 61 processed.Now, send packet buffer 128 and preferentially export OAM to packet transmission part 129
Flow control frame 61 rather than transmission packet.Additionally, dividing 124 to receive transmission from transmission control unit
During control signal, send packet buffer 128 and stop sending to packet transmission part 129 output dividing
Group, until send the time arranged in control signal in the past from receiving and sending control signal.I.e.
Make receive send pass by after control signal to send in control signal the time of setting it
Before, when receiving OAM flow control frame 61 from OAM generation part 127, send packet slow
Rush device 128 and preferentially export OAM flow control frame 61 to packet transmission part 129.Even if additionally,
Before having pass by send the time arranged in control signal after receiving transmission control signal,
When dividing 124 to be newly received the transmission control signal that the time of setting is " 0 " from transmission control unit, send out
Send the transmission packet output that packet buffer 128 recovers to stop.
Packet transmission part 129 perform send send packet buffer 208 output transmission packet or
The process of OAM flow control frame 61, and send packet or OAM stream via antenna part 11
Control frame 61.
Fig. 5 is the figure of the concrete example of the form illustrating OAM frame.Table on the left of Fig. 5 is to show
The figure of the form of continuity check message of having anticipated (CCM) frame 51 (a kind of OAM frame).CCM
The form of frame 51 international telecommunication union telecommunication's Standardization Sector (ITU-T) G.1731 defined in.
Table on the right side of Fig. 5 is the figure of the form illustrating OAM flow control frame 61.CCM frame 51 has:
Maintenance Entity (MEG) grade (MEL) field, version field, operation code (OpCode)
Field, tag field, type, length and value (TLV) offset field, sequence number field, MEP
Identifier field, MEG id field, forward direction send frame count (TxFCf) field, reversely receive
Frame count (RxFCb) field, reversely send frame count (TxFCb) field, reserved field,
Terminate TLV field etc..In these fields, sequence number field, MEP id field, MEG ID
Field, TxFCf field, RxFCb field, TxFCb field, reserved field, end TLV word
Section is referred to as TLV field 52.
By the field (flow control information field 62) of flow control information is added to CCM frame 51
Configure OAM flow control frame 61.Such as, by flow control information field 62 is inserted CCM
The TLV field 52 of frame 51 configures OAM flow control frame 61.More specifically, such as, pass through
Flow control information field 62 is inserted in the reserved field of CCM frame 51 with terminate TLV field it
Between configure OAM flow control frame 61.Flow control information field 62 have flow control id field and
Flow control time field.The pre-of instruction OAM flow control frame 61 is set in flow control id field
Definite value.Instruction is set in flow control time field and stops the value of the time sent.
Fig. 6 and 7 is the operation of the transmission/reception control section 12 illustrating packet transfer device 10
The flow chart of flow process.Fig. 6 is the stream illustrating the handling process when having been received by receiving packet
Cheng Tu.Fig. 7 is to illustrate the handling process relevant to the supervision process of congestion detection part 126
Flow chart.The process of Fig. 6 and Fig. 7 can be with executed in parallel, and the process of Fig. 7 can pre-at Fig. 6
Perform after determining process (the reception buffering course of such as step S103).Will be used below Fig. 6
With 7 processes describing transmission/reception control section 12.
First process shown in Fig. 6 is described.If packet receiving portion 121 receives reception packet
(step S101), then packet receiving portion 121 performs reception process, and by reception packet transmission
To packet filter 122.It follows that packet filter 122 with reference to receive packet stem with
Too type, and determine whether reception packet is OAM frame (step S102).If receiving packet
It not OAM frame (step S102-is no), then receives packet buffer 125 buffering and receive packet,
And perform general process (step S103).Receive packet buffer 125 according to Relay Control Portion
The control of 14, by reception packet output to Relay Control Portion 14.If receiving packet is not OAM
Frame, such as, receiving packet can be user data packets etc..On the other hand, if receiving and dividing
Group is OAM frame (step S102-is), then reception packet is transferred to OAM by packet filter 122
Process part 123 (step S104).
It follows that OAM processes part 123 determines whether reception packet is OAM flow control frame
61 (steps S105), such as, this process can perform as follows.First, OAM processes part
123 OpCode values based on OAM frame, determine whether reception packet is CCM frame 51.If
Receiving packet is not CCM frame 51, and OAM processes part 123 and determines that reception packet is not OAM
Flow control frame 61.Additionally, if receiving packet is CCM frame 51, then OAM processes part 123
Also determine whether to there is flow control ID.If there is no flow control ID, then OAM processes part
123 determine that reception packet is not OAM flow control frame 61.On the other hand, if there is flow control
ID, OAM process part 123 and determine that reception packet is OAM flow control frame 61.If it is above-mentioned
It is not OAM flow control frame 61 (step S105-is no) that the result instruction determined receives packet, then
OAM processes part 123 and performs general OAM process (step according to the OAM frame received
S106).On the other hand, if receiving packet is OAM flow control frame 61 (step S105-is),
Then OAM processes part 123 and OAM flow control frame 61 is transferred to transmission control unit divides 124.
It follows that transmission control unit divides in the TLV field of 124 detection OAM flow control frames 61
The flow control time arranged.Transmission control unit divides 124 generations to send control signal, and by flowing
The time arranged in the control time is distributed to send control signal, will send control signal and send to sending out
Send packet buffer 128.If the time (flow control time) arranged in transmission control signal is
" 0 ", then send packet buffer 128 and recover in the case of the transmission process sending packet stops
Transmission process, and perform continuation transmission process (step S108) in the case of transmission process at this moment.
On the other hand, if the flow control time more than " 0 " (step S107-is), then sends buffering of packets
Device 128 sends at this moment to continue to send in the case of process stops and stopping, and is performing transmission process
In the case of stop send (step S109).
Next process shown in Fig. 7 is described.First, congestion detection part 126 is each predetermined
Timing determination receives whether the accumulation grouping number of packet buffer 125 exceedes predetermined upper limit threshold
(step S201).If accumulation grouping number is not less than predetermined upper limit threshold (step S201-is no),
Then congestion detection part 126 does not perform special process.In this case, packet buffer is received
125 perform general process.
On the other hand, if accumulation grouping number exceedes predetermined upper limit threshold (step S201-is),
Then the OAM being used for stopping is produced control signal output to OAM product by congestion detection part 126
First portion 127.It follows that receive the OAM for stopping to produce the OAM product of control signal
First portion 127 produces OAM flow control frame 61.Now, OAM produces part 127 in stream control
(transmission that such as can arrange stops to arrange the value of transmission dwell time more than " 0 " in time field processed
The only maximum of time).OAM produces part 127 for being used as to receive the equipment of itself of side point
The business of (packet transfer device 10), will act as all packet transfer devices 10 of sending side end points
It is set to the sending destination of OAM flow control frame 61.OAM produces part 127 by OAM
Flow control frame 61 output is to sending packet buffer 128.Receive producing part 127 from OAM
During to OAM flow control frame 61, send packet buffer 128 preferential to packet transmission part 129
Output OAM flow control frame 61.Packet transmission part 129 sends OAM flow control frame 61 (step
Rapid S202).OAM produces part 127 and based on OAM frame or receives the header message being grouped, in advance
The sending destination first obtaining OAM flow control frame 61 (is i.e. used as receiving side point
All packet transfer devices 10 of the sending side end points of the business of equipment of itself).Additionally, designer,
Manager etc. pre-sets the business for each packet transfer device 10 so that OAM produces
Part 127 can obtain the above-mentioned transmission purpose of OAM flow control frame 61 based on the content arranged
Ground.
Then, OAM produces part 127 and is iterated the process of step S202, until from gathering around
Plug detection part 126 receives the OAM for recovering and produces control signal (step S203-is no).
Now, OAM produces part 127 and exports OAM flow control frame 61 at certain intervals, with this
Every, in the equipment stopping transmission process, by receiving OAM flow control frame 61, send and stop
Do not interrupt.Such as, OAM produces part 127 to be shorter than in OAM flow control frame 61 setting
The interval of flow control time produces and exports OAM flow control frame 61.
Even if after the process of step S201, congestion detection part 126 continues to monitor and receives
The accumulation grouping number of packet buffer 125.If receiving the accumulation packet of packet buffer 125
Number is less than predetermined lower bound threshold value (step S203-is), then congestion detection part 126 is to OAM
Produce part 127 output and produce control signal for the OAM recovered.It follows that receive use
The OAM generation part 127 producing control signal in the OAM recovered produces OAM flow control frame
61.Now, OAM produces part 127 and sets reset in flow control time field.OAM produces
First portion 127 will act as himself equipment (packet transfer device 10) as end points business send out
The all packet transfer devices 10 sending side point are set to the transmission purpose of OAM flow control frame 61
Ground.OAM produces part 127 and is exported by OAM flow control frame 61 to sending packet buffer 128.
Packet transmission part 129 sends OAM flow control frame 61 (step S204).
The behaviour of packet delivery system 1 described in congested example is there is in packet transfer device 10-7
Make.In this case, packet transfer device 10-7 produces OAM flow control frame 61, Qi Zhong
Flow control time field arranges the value more than " 0 ".OAM is flowed by packet transfer device 10-7
Control frame 61 sends to packet transfer device 10-1.Packet transfer device 10-5,10-4 and 10-3
The OAM flow control frame 61 sent from packet transfer device 10-7 is sent to packet transfer device
10-1.Receive the packet transfer device of the OAM flow control frame 61 being addressed to himself equipment
10-1 extracts the flow control time arranged in OAM flow control frame 61, and stops sending packet
Process, until being set to time of flow control time in the past.If additionally, passing by receive
OAM flow control frame 61 in arrange time, if or being newly received flow control set of time
For the OAM flow control frame 61 of " 0 ", then recover the transmission process sending packet stopped.
In packet delivery system 1, use the CCM frame of Ethernet (registered trade mark) OAM
51, end-to-end communication sends flow control information so that perform in end-to-end communication for often
The flow control of individual business.According to this operation, flow control can be performed only for business 31, and not stop
Only via the business 32 of the physical link identical with business 31.I.e., it is possible to avoid owing to accommodating many
The physical link of individual business occur the congested of specific transactions cause the institute via same physical link
Other business are had to stop.
Additionally, as it has been described above, to congested except occurring in the physical link accommodating multiple business
The transmission of other business outside business stops not impact.Therefore, at the thing accommodating multiple business
In reason link, it can be ensured that QoS and efficiently transmission.
Additionally, as it has been described above, the equipment being used as sending side end points is only packet transfer device 10, produce
The communication terminal 20 of raw user data does not become the end points of sending side.Therefore, there is no need to for product
Each communication terminal 20 of raw user data performs flow control, can be with packet transfer device 10
Unit performs flow control.Therefore, by multiple communication terminals 20 are connected to be grouped transmission set
When forming VLAN (VLAN) for 10, can be by the industry sent from VLAN
Business carries out integrated performing flow control.
<modified example>
Describe two business (business 31 and business 32) in the embodiment shown in fig. 1 to pass through
The example of the network of same link.But, it is not specifically limited to this by the business number of same link.
Additionally, in the above-described embodiments, by flow control information is added to Ethernet OAM
CCM frame 51 produces OAM flow control frame 61.However, it is possible to by flow control information is added
Add to another OAM frame to produce OAM flow control frame 61.For example, it is possible to by by flow control
Information add to ITU-T Y.1731 defined in manufacturer specific OAM(Operation Administration Maintenance) (VSP) produce
OAM flow control frame 61.
Additionally, in the above-described embodiments, the transmission/reception control section 12 shown in Fig. 4 is arranged on
As in the packet transfer device 10 of the MEP of end points.But, the transmission shown in Fig. 4/reception control
Part 12 processed may be mounted at as in the packet transfer device 10 of MIP.Such as, shown in Fig. 4
Transmission/reception control section 12 may be mounted in the packet transfer device 10-5 of Fig. 1.According to
Above-mentioned configuration, even if in trunking (MIP) and congested period occurs between endpoints,
Still can perform the specific flow control of business.In this case, OAM generation part 127 sends
Be addressed to be used as to be relayed by himself equipment (packet transmission equipment 10) business (rather than use
Make to receive the business of equipment of itself (packet transmission equipment 10) of side point) sending side end points
The OAM flow control frame 61 of all packet transmission equipment 10.
Additionally, in the above-described embodiments, receive the OAM for recovering and produce control signal
OAM produces part 127 and produces OAM stream by setting reset in flow control time field
Control frame 61.But, receive the OAM for recovering and produce the OAM generation of control signal
Part 127 can produce any kind of OAM flow control frame 61, as long as may indicate that stopping is sent out
The packet transfer device 10 sending the process sending packet recovers to send the process of packet.Such as,
OAM produces part 127 can be configured to arrange the book character string of instruction recovery transmission process
Or symbol, and in flow control time field, do not set reset.
Although additionally, use packet or frame as the concrete example of PDU, but packet transfer device
10 and packet delivery system 1 can be configured to send the transmission equipment of another PDU.
So far, specifically describe embodiments of the invention the most referring to the drawings, but concrete configuration is not
It is limited to above-described embodiment, but design of scope of purport without departing from the present invention etc. can be included.
This application claims the Japanese patent application No.2010-093991 submitted to 201 0 on April 15,
Priority, its content is incorporated by reference into herein.
Industrial applicibility
Flow control can be performed for each teleservice.
Reference marks
10 (10-1 to 10-8): packet transfer device (transmission equipment)
20: communication terminal
31,32: business
11: antenna part
12: transmission/reception control section
13,14: Relay Control Portion
121: packet receiving portion
122: packet filter
123:OAM processes part
124: transmission control unit divides
125: receive packet buffer (reception buffer)
126: congestion detection part (signal generator divides)
127:OAM produces part (signal generator divides)
128: send packet buffer
129: packet transmission part (transmitting portion)
Claims (4)
1. transmit an equipment, including:
Receive buffer, the delivery unit data that temporary transient accumulative reception arrives；
Signal generator divides, and the cumulant in described reception buffer exceedes predetermined upper limit threshold
Time, producing control signal, the instruction of described control signal stops the transmission of delivery unit data；And
Transmitting portion, sends described control by another transmission equipment is appointed as sending destination
Signal, described another transmits the sending side end points that equipment is used as the business of described delivery unit data,
The business of described delivery unit data to be set by self the transmitting of side point that receive as described business
Standby reception,
Wherein said control signal do not indicate as described sending side end points another transmission equipment with
The transmission equipment being used as to receive between the transmission equipment of himself of side point stops and delivery unit number
According to the transmission of business of delivery unit data of the identical physical link of business.
Transmission equipment the most according to claim 1, wherein:
Described signal generator divides generation control signal, and described control signal indicates: by by described
Another transmission equipment is appointed as described sending destination, recovers the described of described delivery unit data
Send；And
Described transmitting portion sends the described of the described transmission of the instruction described delivery unit data of recovery
Control signal.
Transmission equipment the most according to claim 1 and 2, wherein, described signal generator divides
By runing, managing and safeguard that arranging predetermined value in (OAM) frame produces described control signal.
4. a sending method, including:
Signal produces step, and the reception in the delivery unit data arrived for temporary transient accumulative reception buffers
When cumulant in device exceedes predetermined upper limit threshold, by the transmission equipment with described reception buffer
Producing control signal, the instruction of described control signal stops the transmission of delivery unit data；And
Forwarding step, by being appointed as himself biography of sending destination cause by another transmission equipment
Sending equipment to send described control signal, described another transmits equipment and is used as described delivery unit data
The sending side end points of business, the business of described delivery unit data will be by the reception as described business
The equipment that self transmits of side point receives,
Wherein said control signal do not indicate as described sending side end points another transmission equipment with
The transmission equipment being used as to receive between the transmission equipment of himself of side point stops and delivery unit number
According to the transmission of business of delivery unit data of the identical physical link of business.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-093991 | 2010-04-15 | ||
| JP2010093991 | 2010-04-15 | ||
| PCT/JP2011/059163 WO2011129363A1 (en) | 2010-04-15 | 2011-04-13 | Transmission device, transmission method and computer programme. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102845102A CN102845102A (en) | 2012-12-26 |
| CN102845102B true CN102845102B (en) | 2016-11-30 |
Family
ID=
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009049307A1 (en) * | 2007-10-12 | 2009-04-16 | Nortel Networks Limited | Automatic mep provisioning in a link state controlled ethernet network |
| CN101438541A (en) * | 2006-09-20 | 2009-05-20 | 松下电器产业株式会社 | Relay transmission device and relay transmission method |
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101438541A (en) * | 2006-09-20 | 2009-05-20 | 松下电器产业株式会社 | Relay transmission device and relay transmission method |
| WO2009049307A1 (en) * | 2007-10-12 | 2009-04-16 | Nortel Networks Limited | Automatic mep provisioning in a link state controlled ethernet network |
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