CN106330499A - Time division multiplexing data transmission method and device, as well as network-side edge devices - Google Patents
Time division multiplexing data transmission method and device, as well as network-side edge devices Download PDFInfo
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- CN106330499A CN106330499A CN201510359424.1A CN201510359424A CN106330499A CN 106330499 A CN106330499 A CN 106330499A CN 201510359424 A CN201510359424 A CN 201510359424A CN 106330499 A CN106330499 A CN 106330499A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/68—Pseudowire emulation, e.g. IETF WG PWE3
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Abstract
The invention provides a time division multiplexing data transmission method and device, as well as network-side edge devices. The method comprises the following steps: acquiring a time division multiplexing data stream, which is required to be transmitted from a first network-side edge device to a second network-side edge device by a user, from a user-side link established by a client-side edge device and the first network-side edge device, and acquiring the VLAN label used for marking the user-side link; encapsulating the time-division multiplexing data stream according to the VLAN label, so that an IP message is obtained; and acquiring a multi-protocol label switching (MPLS) label corresponding to the VLAN label from a pre-saved pseudo-wire (PW) routing table, encapsulating the IP message into an MPLS message according to the MPLS label, sending the MPLS message to the second network-side edge device through a PSN network, and decapsulating the MPLS message by the second network-side edge device to obtain the time-division multiplexing data stream. Therefore, the problem that the pseudo-wire label resources of the conventional time division multiplexing service are insufficient in the simulation technology is solved.
Description
Technical field
The present invention relates to communication technical field, particularly relate to the transmission method of a kind of time multiplexing date, device
And network side edge device.
Background technology
Along with user is more and more higher to the requirement of bandwidth, communication network full IPization trend is more and more obvious.This is just
Need conventional communication networks is transformed, and the Internet resources existed can not be wasted, the most still
Need that traditional time division multiplex (Time Division Multiplex, TDM) link is possessed business support energy
Power.
In order at packet switching network (Packet Switched Network, PSN), such as IP network or many
Protocol label exchange (Multi-Protocol Label Switching, MPLS) network realizes traditional TDM
Business function, a kind of Pseudo Wire Emulation Edge-to-Edge of needs employing (Pseudo-Wire Emulation Edge to Edge,
PWE3) two layer service bearing technologies.PWE3 is virtual dedicated line service (Virtual Private Wire
Service, VPWS) one, belong to the L2VPN (Layer2Virtual Private Network) of point-to-point
Technology, user's two layer message is transparent transmission between pseudo-wire (Pseudo Wire, PW), for network side edge device
(Provider Edge, PE), PW virtual connections set up after, user side AC (Access Circuit) interface and
The mapping relations of PW have entirely defined；For core P equipment, it is only necessary to according to MPLS label
Carry out MPLS forwarding, be indifferent to the two-layer user message of MPLS message enclosed inside.
In current TDM business simulating functional design, in order to realize the end-to-end emulation of TDM business,
Need to bind an AC link and two PW labels (PW private network tags and PW public network label).
Like this, PE equipment needs to reserve a number of PW private network tags to TDM artificial service, this
The PW private network tags of part just slatterns, it is impossible to uses on public network, causes the money of PW public network label
, there is the problem that PW label resources is not enough in source bottleneck.
Summary of the invention
It is an object of the invention to provide the transmission method of a kind of time multiplexing date, device and network side edge
Equipment, solves the problem that in existing TDM business simulating technology, PW label resources is not enough.
To achieve these goals, the invention provides the transmission method of a kind of time multiplexing date, be applied to
First network lateral edges equipment, including:
From user's sidelinks that customer side edge device and described first network lateral edges equipment are set up, obtain
User needs to be sent to the time division multiplexing tdm of the second network edge device from described first network lateral edges equipment
Data stream, and obtain the virtual LAN VLAN label for identifying described user's sidelinks；
According to described VLAN tag, it is packaged described tdm traffic processing, obtains IP message；
In the pseudo-wire PW routing table pre-saved, obtain the multi-protocols mark corresponding with described VLAN tag
Sign exchange MPLS label, and according to described MPLS label, described IP message be packaged into MPLS message,
And it is sent to described second network edge device by packet switching network PSN, by described second network edge
Equipment carries out decapsulation process and obtains described tdm traffic described MPLS message.
Wherein, described according to described VLAN tag, it is packaged described tdm traffic processing,
Step to IP message includes:
Described tdm traffic is carried out demultiplexing process, obtains E1 frame；
In described E1 frame, increase described VLAN tag, Ethernet header and link layer headers, obtain described IP
Message.
Wherein, described MPLS label includes: PW label and the tunnel label corresponding with described PW label；
And
In the pseudo-wire PW routing table pre-saved, obtain the multi-protocols mark corresponding with described VLAN tag
Sign exchange MPLS label, including:
In the PW routing table pre-saved, search whether to there is the PW corresponding with described VLAN tag
Label；
If existing, then obtain the PW label corresponding with described VLAN tag, and obtain and described PW mark
Sign corresponding tunnel label.
Wherein, described according to described MPLS label, described IP message is packaged into MPLS message, including:
Peel off the VLAN tag of described IP message, and described tunnel label and described PW Tag Packaging are arrived
In described IP message, obtain described MPLS message.
Wherein, described VLAN tag includes the first VLAN tag and the second VLAN tag；
Wherein, the 0bit-5bit of described first VLAN tag is used for indicating the length of message payload, the
6bit-10bit is used for identification message type of service, and 11bit is for indicating the direction of transfer of message, 12bit
Representing criteria field, 13bit-15bit is for representing the priority of message；
The 0bit-7bit of described second VLAN tag is for identifying the numbering of user's sidelinks, and 8bit uses
In the polymeric type attribute of identification message business, 9bit-11bit is for representing the physical interface of user's sidelinks
Numbering, 12bit represents criteria field, and 13bit-15bit is for representing the priority of message.
Present invention also offers the transmitting device of a kind of time multiplexing date, be applied to first network lateral edges and set
Standby, including:
First acquisition module, for set up from customer side edge device and described first network lateral edges equipment
In user's sidelinks, obtaining user needs to be sent to the second network edge from described first network lateral edges equipment
The tdm traffic of equipment, and obtain the virtual LAN VLAN mark for identifying described user's sidelinks
Sign；
First processing module, for according to described VLAN tag, is packaged described tdm traffic
Process, obtain IP message；
Second processing module, in the pseudo-wire PW routing table pre-saved, obtains and described VLAN
The multiprotocol label switching MPLS label that label is corresponding, and according to described MPLS label by described IP message
It is packaged into MPLS message, and is sent to described second network edge device by PSN network, by described
Two network edge devices carry out decapsulation process and obtain described tdm traffic described MPLS message.
Wherein, described first processing module includes:
First processing unit, for described tdm traffic is carried out demultiplexing process, obtains E1 frame；
Second processing unit, for increasing described VLAN tag, Ethernet header and link layer in described E1 frame
Head, obtains described IP message.
Wherein, described MPLS label includes: PW label and the tunnel label corresponding with described PW label；
And
Described second processing module includes:
First searches unit, in the PW routing table pre-saved, searches whether to exist with described
The PW label that VLAN tag is corresponding；
, if in described PW routing table, there is PW corresponding with described VLAN tag in the first acquiring unit
Label, then obtain the PW label corresponding with described VLAN tag, and obtain corresponding with described PW label
Tunnel label.
Wherein, described second processing module includes:
3rd processing unit, for peeling off the VLAN tag of described IP message, and by described tunnel label and
Described PW Tag Packaging, in described IP message, obtains described MPLS message.
Present invention also offers a kind of network side edge device, including the biography of time multiplexing date as above
Defeated device.
Present invention also offers the transmission method of a kind of time multiplexing date, be applied to first network lateral edges and set
Standby, including:
Obtaining the multiprotocol label switching MPLS message that packet switching network PSN sends, described MPLS reports
User is needed to be sent to described the from the second network side edge device by literary composition for described second network side edge device
The tdm traffic of one network edge device is packaged processing and obtains；
In the pseudo-wire PW routing table pre-saved, obtain and the MPLS entrained by described MPLS message
The VLAN tag that label is corresponding, and according to described VLAN tag, described MPLS message is packaged into IP
Message, described VLAN tag is used for identifying customer side edge device and builds with described first network lateral edges equipment
Vertical user's sidelinks；
Described IP message is carried out decapsulation process, obtains described tdm traffic, and marked by VLAN
Described tdm traffic is sent to the customer side edge device of correspondence by the user's sidelinks signing mark.
Wherein, described MPLS label includes: PW label and the tunnel label corresponding with described PW label；
And
Described in the pseudo-wire PW routing table pre-saved, obtain and entrained by described MPLS message
The VLAN tag that MPLS label is corresponding, including:
In described PW routing table, search whether to exist and the PW label entrained by described MPLS message
Corresponding VLAN tag；
If existing, then obtain the VLAN tag corresponding with the PW label entrained by described MPLS message.
Wherein, described according to described VLAN tag, described MPLS message is packaged into IP message, including:
Peel off the tunnel label in described MPLS message and PW label, and described VLAN tag is encapsulated
In described MPLS message, obtain described IP message.
Wherein, described described IP message is carried out decapsulation process, obtain the step of described tdm traffic
Including:
In the VLAN routing table pre-saved, search whether to there is the VLAN entrained by described IP message
Label；
If existing, then peel off VLAN tag, Ethernet header and the link layer headers in described IP message, obtain
E1 frame；
Described E1 frame is carried out multiplexing process, obtains described tdm traffic.
Wherein, described VLAN tag includes the first VLAN tag and the second VLAN tag；
Wherein, the 0bit-5bit of described first VLAN tag is used for indicating the length of message payload, the
6bit-10bit is used for identification message type of service, and 11bit is for indicating the direction of transfer of message, 12bit
Representing criteria field, 13bit-15bit is for representing the priority of message；
The 0bit-7bit of described second VLAN tag is for identifying the numbering of user's sidelinks, and 8bit uses
In the polymeric type attribute of identification message business, 9bit-11bit is for representing the physical interface of user's sidelinks
Numbering, 12bit represents criteria field, and 13bit-15bit is for representing the priority of message.
Present invention also offers the transmitting device of a kind of time multiplexing date, be applied to first network lateral edges and set
Standby, including:
Second acquisition module, for obtaining the multiprotocol label switching MPLS message that PSN network sends, institute
Stating MPLS message is that user is needed to pass from the second network side edge device by described second network side edge device
Deliver to the tdm traffic of described first network edge device be packaged processing and obtain；
3rd processing module, in the pseudo-wire PW routing table pre-saved, obtains and described MPLS
The VLAN tag that MPLS label entrained by message is corresponding, and according to described VLAN tag by described
MPLS message is packaged into IP message, and described VLAN tag is used for identifying customer side edge device and described the
User's sidelinks that one network side edge device is set up；
Fourth processing module, for described IP message is carried out decapsulation process, obtains described tdm data
Stream, and described tdm traffic is sent to corresponding visitor by the user's sidelinks identified by VLAN tag
Family lateral edges equipment.
Wherein, described MPLS label includes: PW label and the tunnel label corresponding with described PW label；
And
Described 3rd processing module includes:
Second searches unit, in described PW routing table, searches whether to exist and reports with described MPLS
The VLAN tag that PW label entrained by literary composition is corresponding；
Second acquisition unit, if in described PW routing table, existing and taken with described MPLS message
The VLAN tag corresponding to PW label of band, then obtain and the PW label entrained by described MPLS message
Corresponding VLAN tag.
Wherein, described 3rd processing module includes:
Fourth processing unit, for peeling off the tunnel label in described MPLS message and PW label, and will
Described VLAN tag is encapsulated in described MPLS message, obtains described IP message.
Wherein, described fourth processing module includes:
3rd searches unit, in the VLAN routing table pre-saved, searches whether to there is described IP
VLAN tag entrained by message；
5th processing unit, if in described VLAN routing table, existing entrained by described IP message
VLAN tag, then peel off VLAN tag, Ethernet header and the link layer headers in described IP message, obtain
E1 frame；
6th processing unit, for described E1 frame is carried out multiplexing process, obtains described tdm traffic.
Present invention also offers a kind of network side edge device, including the biography of time multiplexing date as above
Defeated device.
The embodiment of the present invention has the advantages that
The transmission method of the time multiplexing date of the embodiment of the present invention, utilizes VLAN tag by tdm data
It is packaged into IP message, then in the PW routing table pre-saved, obtains corresponding with VLAN tag
MPLS label, and according to described MPLS label, described IP message is packaged into MPLS message, complete TDM
Business packed, and in opposite side inverse process reduction TDM business, it is achieved the emulation of TDM business.The present invention
By utilizing VLAN tag to carry out the forwarding of IP message at PE device interior, from without PE equipment it is
TDM artificial service reserves a number of PW private network tags, solves in TDM business simulating technology
The problem of pseudo line tag inadequate resource.
Accompanying drawing explanation
Fig. 1 represents the network diagram of PWE3 in existing TDM business simulating technology；
Fig. 2 represents the form schematic diagram of PWE3 message in existing TDM business simulating technology；
Fig. 3 represents the form schematic diagram of MPLS message in existing TDM business simulating technology；
Fig. 4 represents tdm traffic encapsulation schematic diagram in prior art；
Fig. 5 represents tdm traffic decapsulation schematic diagram in prior art；
Fig. 6 represents the first workflow diagram of the transmission method of the time multiplexing date of the embodiment of the present invention；
Fig. 7 represents the form schematic diagram of the IP message of the transmission method of the time multiplexing date of the embodiment of the present invention；
Fig. 8 represents that in the transmission method of the time multiplexing date of the embodiment of the present invention, the message of PE device interior turns
Send out schematic diagram；
Fig. 9 represents the ingress of PE device interior in the transmission method of the time multiplexing date of the embodiment of the present invention
The message encapsulation schematic diagram in direction；
Figure 10 represents the first structured flowchart of the transmitting device of the time multiplexing date of the embodiment of the present invention；
Figure 11 represents the second workflow diagram of the transmission method of the time multiplexing date of the embodiment of the present invention；
Figure 12 represents the egress of PE device interior in the transmission method of the time multiplexing date of the embodiment of the present invention
The message decapsulation schematic diagram in direction；
Figure 13 represents the second structured flowchart of the transmitting device of the time multiplexing date of the embodiment of the present invention.
Detailed description of the invention
For making the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with tool
Body embodiment and accompanying drawing are described in detail.
In prior art, in PSN network, realize traditional TDM by PWE3 bis-layer service bearing technology
Business function.Concrete, as it is shown in figure 1, by PWE3 technology at IP/MPLS between PE1 and PE2
Packet switch achieves AC link (the concretely TDM link) exchange between CE1 and CE2 on the net,
For CE1 and CE2, PE1 and PE2 and the IP/MPLS packet switching network are all transparent.
The PE of IP/MPLS packet switch network edge, by AC link and PW being bound, carries out TDM business envelope
Dress, and in other end inverse process reduction TDM business, thus realize TDM business simulating.
In order to realize tdm traffic encapsulation and decapsulation function on PE equipment, PE equipment needs to support
TDM service board.TDM service board needs to comprise TDM interface module and network processor module.Root
According to RFC4553/RFC5086 standard, in entrance ingress direction, TDM interface module is according to the PW of configuration
Label (privately owned label is used merely to inside TDM service board E-Packet) will receive from AC port
To tdm traffic be packaged into PWE3 message (message format is as shown in Figure 2), TDM interface module will
PWE3 message after encapsulation is transmitted to network processor module.Network processor module is according to the tunnel of configuration
Tunnel label and PW label (public network label is used at PSN forwarded message), will connect from TDM
The PWE3 message that mouth die block receives is peeled PW private network tags off and is encapsulated tunnel label and PW public affairs the most again
Network mark label, message now has become the MPLS message (message format is as shown in Figure 3) of standard, will encapsulation
After MPLS message be transmitted to PSN network.The message encapsulation process in entrance Ingress direction is as shown in Figure 4.
In egress direction, the MPLS message received from PSN network is first peeled off tunnel by network processor module
Label and PW public network label encapsulate PW private network tags the most again, are transmitted to by the PWE3 message after encapsulation
TDM interface module.The PWE3 message received is peeled off PW private network tags by TDM interface module, will
Tdm traffic after decapsulation is sent to AC port.The decapsulation process of MPLS message is as shown in Figure 5.
But, during above-mentioned TDM business simulating, PE equipment needs to TDM artificial service reserved certain
The PW private network tags of quantity, the PW private network tags of this part can not use on public network, causes PW public
, there is the problem that PW label resources is not enough in the resource bottleneck of network mark label.
Based on the problems referred to above, The embodiment provides the transmission method of a kind of time multiplexing date, dress
Putting and network side edge device, pseudo line tag resource is not in emulation technology to solve existing TDM service
The problem of foot.
The transmission method of the time multiplexing date of the embodiment of the present invention, as shown in Figure 6, including:
Step S61: the user's sidelinks set up with described first network lateral edges equipment from customer side edge device
In, obtaining user needs to be sent to the time-division of the second network edge device from described first network lateral edges equipment
Multiplexed TDM data stream, and obtain the virtual LAN VLAN label for identifying described user's sidelinks.
Step S62: according to described VLAN tag, is packaged described tdm traffic processing, obtains
IP message.
Step S63: in the pseudo-wire PW routing table pre-saved, obtains corresponding with described VLAN tag
Multiprotocol label switching MPLS label, and according to described MPLS label, described IP message is packaged into
MPLS message, and it is sent to described second network edge device by packet switching network PSN, by described
Second network edge device carries out decapsulation process and obtains described tdm traffic described MPLS message.
The transmission method of the time multiplexing date of the embodiment of the present invention, utilizes VLAN tag by tdm data
Stream is packaged into IP message, then in the PW routing table pre-saved, obtains corresponding with VLAN tag
MPLS label, and according to described MPLS label, described IP message is packaged into MPLS message, complete TDM
Business packed, and in opposite side inverse process reduction TDM business, it is achieved the emulation of TDM business.The present invention
By utilizing VLAN tag to carry out the forwarding of IP message at PE device interior, from without PE equipment it is
TDM artificial service reserves a number of PW private network tags, solves in TDM business simulating technology
The problem of pseudo line tag inadequate resource.
Further, described VLAN tag includes the first VLAN tag and the second VLAN tag；
Wherein, the 0bit-5bit of described first VLAN tag is used for indicating the length of message payload, the
6bit-10bit is used for identification message type of service, and 11bit is for indicating the direction of transfer of message, 12bit
Representing criteria field, 13bit-15bit is for representing the priority of message；
The 0bit-7bit of described second VLAN tag is for identifying the numbering of user's sidelinks, and 8bit uses
In the polymeric type attribute of identification message business, 9bit-11bit is for representing the physical interface of user's sidelinks
Numbering, 12bit represents criteria field, and 13bit-15bit is for representing the priority of message.
In a particular embodiment of the present invention, the TDM service board of PE equipment includes two modules, i.e. TDM
Interface module and network processor module, connected by SGMII interface or XGMII interface between the two.
The method that the present invention is to be realized is jointly to be completed by TDM interface module and network processor module.In order to
Realizing the end-to-end emulation of TDM business, the present invention uses two-layer VLAN tag (private network tags) at TDM
Forward ether IP message between interface module and network processor module, message format as it is shown in fig. 7, its
In, in addition to Packet Payload, it being self-defined head, DMAC represents equipment MAC, can configure；SMAC
Represent self-defined veneer MAC, can be any MAC；802.1Q represents 802.1Q standard definition format；Packet
Payload represents message content.For convenience of description, two-layer VLAN tag is respectively defined as by the present invention
VLAN1 and VLAN2.In order to realize message turning between TDM interface module and network processor module
Sending out, the present invention needs to redefine VLAN tag.The present invention uses VLAN1 label to add VLAN2
Label uniquely identifies an AC link.
As shown in table 1, the VLAN1 tag definition in the present invention is as follows:
Bit0～bit5 of VLAN1 label is defined as PKT_LEN field, for the filling of message with go to fill,
Represent the length of message payload (including link layer headers and message actual content two parts), if PKT_LEN
Field is 0, represents that the length of message payload is more than 60 bytes；Otherwise represent message reality in addition to filling field
Border payload length.Bit6～bit10 is defined as ENCAP_TYPE field, represent message traffic type (when
When the value of ENCAP_TYPE field is 0xa, represent TDM service message).Bit11 is defined as
CPU_PKT_INDICATOR field, when the value of CPU_PKT_INDICATOR field is 0x1,
Representing transmitted to CPU message, in the case of other, the value of CPU_PKT_INDICATOR field is 0x0.bit12
It is defined as CFI field, criteria field.Bit13～bit15 is defined as PRIORITY (802.1p) field, table
Show priority, be used for dispatching.
As shown in table 1, the VLAN2 tag definition in the present invention is as follows:
Bit0～bit7 of VLAN2 label is defined as CHANNEL_NO field, represents certain under AC port
The numbering of bar TDM link, for certain AC port, the value of CHANNEL_NO field is unique.
Bit8 is defined as AGGREGATION field, and AGGREGATION field value is that 0x0 indicates without polymerization
The business of generic attribute, value is the business that 0x1 represents polymeric type attribute, for TDM business simulating,
AGGREGATION field value is 0x0.Bit9～bit11 is defined as PORT_ID field, represents AC
The numbering of physical port, if AC port is PDH port, the value of PORT_ID field is 0, as
If really AC port is empty port, then the value of PORT_ID field is 0.Bit12 is defined as CFI field, mark
Quasi-field.Bit13～bit15 is defined as PRIORITY (802.1p) field, represents priority, due to scheduling.
Table 1
Further, described according to described VLAN tag, it is packaged described tdm traffic processing,
The step obtaining IP message includes:
Described tdm traffic is carried out demultiplexing process, obtains E1 frame；
In described E1 frame, increase described VLAN tag, Ethernet header and link layer headers, obtain described IP
Message.
In a particular embodiment of the present invention, described Ethernet header comprises the steps that target MAC (Media Access Control) address DMAC (this
Invention is defined as the MAC Address of PE equipment) and source MAC SMAC (present invention is defined as except extensively
Broadcast any MAC Address outside address)；Described link layer headers is packaged according to standard RFC4385.
Further, described MPLS label includes: PW label and the tunnel mark corresponding with described PW label
Sign；And
In the pseudo-wire PW routing table pre-saved, obtain the multi-protocols mark corresponding with described VLAN tag
Sign exchange MPLS label, including:
In the PW routing table pre-saved, search whether to there is the PW corresponding with described VLAN tag
Label；
If existing, then obtain the PW label corresponding with described VLAN tag, and obtain and described PW mark
Sign corresponding tunnel label.
In a particular embodiment of the present invention, the PE equipment of PSN network creates virtual connections PW (public network
PW) after, distribution PW label (public network label), create tunnel tunnel, and distribute tunnel label, will
PW binds with tunnel., AC link is bound with virtual connections PW meanwhile, will
VLAN1/VLAN2 label maps with PW label, obtains described PW routing table, wherein, described
In PW routing table, storage has the PW label according to corresponding relation storage, the first VLAN tag, the 2nd VLAN
Label and tunnel label.
Further, described according to described MPLS label, described IP message is packaged into MPLS message, bag
Include:
Peel off the VLAN tag of described IP message, and described tunnel label and described PW Tag Packaging are arrived
In described IP message, obtain described MPLS message.
In a particular embodiment of the present invention, as shown in Figure 8, in Way in (AC → PSN direction),
TDM interface module receives tdm traffic from AC port, and tdm traffic demultiplexes into E1 frame,
And E1 frame is packaged into ether IP message, by SGMII interface or XGMII interface, ether IP is reported
Literary composition is transmitted to network processor module.
Network processor module receives ether IP message, according to the two-layer VLAN tag of ether IP message
(private network tags), searches PW routing table, if finding corresponding tunnel label and PW label, then
Then the two-layer VLAN tag (private network tags) peeling off ether IP message encapsulates tunnel label and PW mark
Signing, the link layer headers of ether IP message keeps constant (link layer headers is as a part for message payload),
Complete the encapsulation of MPLS message, the MPLS message after encapsulation is transmitted to PSN network.Without lookup
To tunnel label and PW label, then by the IP packet loss of this ether, wherein, Fig. 9 represents PE equipment
The message encapsulation schematic diagram of internal Way in (AC → PSN direction).
In a particular embodiment of the present invention, a PE equipment according to two-layer VLAN tag by described TDM
Data stream becomes IP message and is transmitted to network processor module, network processor module mark according to PW
Sign and described IP message is packaged into MPLS message by the tunnel label corresponding with described PW label, and forward
To PSN network, PSN network described MPLS message is sent to the 2nd PE equipment, by described second
PE equipment carries out decapsulation process to described MPLS message, obtains described tdm traffic, completes TDM
Artificial service.
Embodiments of the invention additionally provide the transmitting device of a kind of time multiplexing date, are applied to first network
Lateral edges equipment, as shown in Figure 10, including:
First acquisition module 101, for setting up with described first network lateral edges equipment from customer side edge device
User's sidelinks in, obtain user need be sent to the second network edge from described first network lateral edges equipment
The tdm traffic of edge equipment, and obtain the virtual LAN VLAN for identifying described user's sidelinks
Label；
First processing module 102, for according to described VLAN tag, seals described tdm traffic
Dress processes, and obtains IP message；
Second processing module 103, in the pseudo-wire PW routing table pre-saved, obtains and described VLAN
The multiprotocol label switching MPLS label that label is corresponding, and according to described MPLS label by described IP message
It is packaged into MPLS message, and is sent to described second network edge device by PSN network, by described
Two network edge devices carry out decapsulation process and obtain described tdm traffic described MPLS message.
The transmitting device of the time multiplexing date of the embodiment of the present invention, described first processing module 102 includes:
First processing unit, for described tdm traffic is carried out demultiplexing process, obtains E1 frame；
Second processing unit, for increasing described VLAN tag, Ethernet header and link layer in described E1 frame
Head, obtains described IP message.
The transmitting device of the time multiplexing date of the embodiment of the present invention, described MPLS label includes: PW label
And the tunnel label corresponding with described PW label；And
Described second processing module 103 includes:
First searches unit, in the PW routing table pre-saved, searches whether to exist with described
The PW label that VLAN tag is corresponding；
, if in described PW routing table, there is PW corresponding with described VLAN tag in the first acquiring unit
Label, then obtain the PW label corresponding with described VLAN tag, and obtain corresponding with described PW label
Tunnel label.
The transmitting device of the time multiplexing date of the embodiment of the present invention, described second processing module 103 includes:
3rd processing unit, for peeling off the VLAN tag of described IP message, and by described tunnel label and
Described PW Tag Packaging, in described IP message, obtains described MPLS message.
The embodiment of the present invention additionally provides a kind of network side edge device, including time division multiplex number as above
According to transmitting device.
It should be noted that this device and network side edge device are the devices corresponding with said method embodiment
And equipment, in said method embodiment, all implementations are all be applicable to the embodiment of this device and equipment,
Also identical technique effect can be reached.
The decapsulation to described MPLS message is realized according to VLAN tag in order to realize PE equipment, this
Bright embodiment additionally provides the transmission method of a kind of time multiplexing date, is applied to first network lateral edges equipment,
As shown in figure 11, including:
Step 111: obtain the multiprotocol label switching MPLS message that packet switching network PSN sends, institute
Stating MPLS message is that user is needed to pass from the second network side edge device by described second network side edge device
Deliver to the tdm traffic of described first network edge device be packaged processing and obtain；
Step 112: in the pseudo-wire PW routing table pre-saved, obtains and entrained by described MPLS message
VLAN tag corresponding to MPLS label, and according to described VLAN tag, described MPLS message is sealed
Dressing up IP message, described VLAN tag is used for identifying customer side edge device and described first network lateral edges
User's sidelinks that equipment is set up；
Step 113: described IP message is carried out decapsulation process, obtains described tdm traffic, and pass through
Described tdm traffic is sent to the customer side edge device of correspondence by user's sidelinks of VLAN tag mark.
The transmission method of the time multiplexing date of the embodiment of the present invention, after obtaining MPLS message, on PW road
By table obtains the VLAN tag corresponding with the MPLS label entrained by described MPLS message, and according to
Described MPLS message is packaged into IP message by described VLAN tag, finally solves described IP message
Encapsulation process, obtains described tdm traffic, completes the decapsulation to MPLS message and processes.At above-mentioned place
During reason, carried out the forwarding of IP message at PE device interior by VLAN tag, from without PE
Equipment is that TDM artificial service reserves a number of PW private network tags, solves at TDM business simulating
The problem of pseudo line tag inadequate resource in technology.
Further, described MPLS label includes: PW label and the tunnel mark corresponding with described PW label
Sign；And
Described in the pseudo-wire PW routing table pre-saved, obtain and entrained by described MPLS message
The VLAN tag that MPLS label is corresponding, including:
In described PW routing table, search whether to exist and the PW label entrained by described MPLS message
Corresponding VLAN tag；
If existing, then obtain the VLAN tag corresponding with the PW label entrained by described MPLS message.
Further, described according to described VLAN tag, described MPLS message is packaged into IP message, bag
Include:
Peel off the tunnel label in described MPLS message and PW label, and described VLAN tag is encapsulated
In described MPLS message, obtain described IP message.
In a particular embodiment of the present invention, as shown in Figure 8, in Way out (PSN → AC direction),
Network processor module receives the MPLS message of PSN network, according to PW label lookup PW routing table,
If finding VLAN1 and VLAN2 label (private network tags), then peel off the tunnel of MPLS message
Label and PW label, then encapsulation two-layer VLAN tag (VLAN1 label and VLAN2 label, private
Network mark label), complete the encapsulation of ether IP message, by SGMII interface or XGMII interface by ether IP
Message is transmitted to TDM interface module.Without finding corresponding VLAN1 and VLAN2 label,
Then by this MPLS packet loss.
Further, described described IP message is carried out decapsulation process, obtain described tdm traffic
Step includes:
In the VLAN routing table pre-saved, search whether to there is the VLAN entrained by described IP message
Label；
If existing, then peel off VLAN tag, Ethernet header and the link layer headers in described IP message, obtain
E1 frame；
Described E1 frame is carried out multiplexing process, obtains described tdm traffic.
In a particular embodiment of the present invention, as shown in Figure 8, in Way out (PSN → AC direction),
TDM interface module, from SGMII interface or XGMII interface ether IP message, searches VLAN
Routing table, if finding VLAN1 and VLAN2 label, then peels off the Ethernet header of ether IP message
(DMAC and SMAC), two-layer VLAN tag (VLAN1 label and VLAN2 label), link layer
Head (Control word), deblocking is dressed up E1 frame, then E1 frame is multiplexed into tdm traffic and is transmitted to
AC port.Without finding VLAN1 and VLAN2 label, then by the IP packet loss of this ether,
Wherein, Figure 12 represent PE device interior Way out (PSN → AC direction) message decapsulation signal
Figure.
Below in conjunction with the above-mentioned encapsulation to tdm traffic and the description of decapsulation process, illustrate that the present invention is real
Execute the simulation process of tdm data business in example.
As shown in Figure 8, in Way in (AC → PSN direction), TDM interface module receives TDM
Data stream, increases two-layer VLAN tag (private network tags) and is packaged into ether IP message, pass through SGMII
Interface or XGMII interface are transmitted to network processor module.Network processor module receives ether IP
Message, peels off two-layer VLAN tag, increases tunnel label and becomes MPLS message with PW Tag Packaging,
It is transmitted to PSN network.
In Way out (PSN → AC direction), network processor module receives MPLS message, stripping
From tunnel label and PW label, increase two-layer VLAN tag (private network tags) and be packaged into ether IP report
Literary composition, is transmitted to TDM interface module by SGMII interface or XGMII interface.TDM interface module
Receiving ether IP message, peel off the two-layer VLAN tag of message, tdm traffic is dressed up in deblocking, complete
Become the emulation of TDM business.
The embodiment of the present invention additionally provides the transmitting device of a kind of time multiplexing date, is applied to first network side
Edge device, as shown in figure 13, including:
Second acquisition module 131, for obtaining the multiprotocol label switching MPLS message that PSN network sends,
Described MPLS message is that user is needed from the second network side edge device by described second network side edge device
It is sent to the tdm traffic of described first network edge device be packaged processing and obtain；
3rd processing module 132, in the pseudo-wire PW routing table pre-saved, obtains and described MPLS
The VLAN tag that MPLS label entrained by message is corresponding, and according to described VLAN tag by described
MPLS message is packaged into IP message, and described VLAN tag is used for identifying customer side edge device and described the
User's sidelinks that one network side edge device is set up；
Fourth processing module 133, for described IP message is carried out decapsulation process, obtains described TDM number
According to stream, and described tdm traffic is sent to correspondence by the user's sidelinks identified by VLAN tag
Customer side edge device.
The transmitting device of the time multiplexing date of the embodiment of the present invention, described MPLS label includes: PW label
And the tunnel label corresponding with described PW label；And
Described 3rd processing module 132 includes:
Second searches unit, in described PW routing table, searches whether to exist and reports with described MPLS
The VLAN tag that PW label entrained by literary composition is corresponding；
Second acquisition unit, if in described PW routing table, existing and taken with described MPLS message
The VLAN tag corresponding to PW label of band, then obtain and the PW label entrained by described MPLS message
Corresponding VLAN tag.
The transmitting device of the time multiplexing date of the embodiment of the present invention, described 3rd processing module 132 includes:
Fourth processing unit, for peeling off the tunnel label in described MPLS message and PW label, and will
Described VLAN tag is encapsulated in described MPLS message, obtains described IP message.
The transmitting device of the time multiplexing date of the embodiment of the present invention, described fourth processing module 133 includes:
3rd searches unit, in the VLAN routing table pre-saved, searches whether to there is described IP
VLAN tag entrained by message；
5th processing unit, if in described VLAN routing table, existing entrained by described IP message
VLAN tag, then peel off VLAN tag, Ethernet header and the link layer headers in described IP message, obtain
E1 frame；
6th processing unit, for described E1 frame is carried out multiplexing process, obtains described tdm traffic.
Embodiments of the invention additionally provide a kind of network side edge device, including time division multiplex as above
The transmitting device of data.
It should be noted that this device and network side edge device are the devices corresponding with said method embodiment
And equipment, in said method embodiment, all implementations are all be applicable to the embodiment of this device and equipment,
Also identical technique effect can be reached.
The transmission method of the time multiplexing date of the embodiment of the present invention, after obtaining MPLS message, on PW road
By table obtains the VLAN tag corresponding with the MPLS label entrained by described MPLS message, and according to
Described MPLS message is packaged into IP message by described VLAN tag, finally solves described IP message
Encapsulation process, obtains described tdm traffic, completes the decapsulation to MPLS message and processes.At above-mentioned place
During reason, carried out the forwarding of IP message at PE device interior by VLAN tag, from without PE
Equipment is that TDM artificial service reserves a number of PW private network tags, solves at TDM business simulating
The problem of pseudo line tag inadequate resource in technology.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Within bright spirit and principle, any modification, equivalent substitution and improvement etc. made, should be included in this
Within bright protection domain.
Claims (20)
1. a transmission method for time multiplexing date, is applied to first network lateral edges equipment, its feature
It is, including:
From user's sidelinks that customer side edge device and described first network lateral edges equipment are set up, obtain
User needs to be sent to the time division multiplex of the second network edge device from described first network lateral edges equipment
Tdm traffic, and obtain the virtual LAN VLAN label for identifying described user's sidelinks；
According to described VLAN tag, it is packaged described tdm traffic processing, obtains IP message；
In the pseudo-wire PW routing table pre-saved, obtain the multi-protocols corresponding with described VLAN tag
Tag switching MPLS label, and according to described MPLS label, described IP message is packaged into MPLS report
Literary composition, and it is sent to described second network edge device by packet switching network PSN, by described second net
Network edge device carries out decapsulation process and obtains described tdm traffic described MPLS message.
The transmission method of time multiplexing date the most according to claim 1, it is characterised in that described
According to described VLAN tag, it is packaged described tdm traffic processing, obtains the step of IP message
Suddenly include:
Described tdm traffic is carried out demultiplexing process, obtains E1 frame；
In described E1 frame, increase described VLAN tag, Ethernet header and link layer headers, obtain described IP
Message.
The transmission method of time multiplexing date the most according to claim 1, it is characterised in that described
MPLS label includes: PW label and the tunnel label corresponding with described PW label；And
In the pseudo-wire PW routing table pre-saved, obtain the multi-protocols corresponding with described VLAN tag
Tag switching MPLS label, including:
In the PW routing table pre-saved, search whether to there is the PW corresponding with described VLAN tag
Label；
If existing, then obtain the PW label corresponding with described VLAN tag, and obtain and described PW
The tunnel label that label is corresponding.
The transmission method of time multiplexing date the most according to claim 3, it is characterised in that described
According to described MPLS label, described IP message is packaged into MPLS message, including:
Peel off the VLAN tag of described IP message, and by described tunnel label and described PW Tag Packaging
In described IP message, obtain described MPLS message.
The transmission method of time multiplexing date the most according to claim 1, it is characterised in that described
VLAN tag includes the first VLAN tag and the second VLAN tag；
Wherein, the 0bit-5bit of described first VLAN tag is used for indicating the length of message payload, the
6bit-10bit is used for identification message type of service, and 11bit is for indicating the direction of transfer of message, 12bit
Representing criteria field, 13bit-15bit is for representing the priority of message；
The 0bit-7bit of described second VLAN tag is for identifying the numbering of user's sidelinks, 8bit
For the polymeric type attribute of identification message business, 9bit-11bit is for representing that the physics of user's sidelinks connects
The numbering of mouth, 12bit represents criteria field, and 13bit-15bit is for representing the priority of message.
6. a transmitting device for time multiplexing date, is applied to first network lateral edges equipment, its feature
It is, including:
First acquisition module, for set up from customer side edge device and described first network lateral edges equipment
In user's sidelinks, obtaining user needs to be sent to the second network edge from described first network lateral edges equipment
The tdm traffic of equipment, and obtain the virtual LAN VLAN mark for identifying described user's sidelinks
Sign；
First processing module, for according to described VLAN tag, is packaged described tdm traffic
Process, obtain IP message；
Second processing module, in the pseudo-wire PW routing table pre-saved, obtains and described VLAN
The multiprotocol label switching MPLS label that label is corresponding, and according to described MPLS label, described IP is reported
Literary composition is packaged into MPLS message, and is sent to described second network edge device by PSN network, by institute
State the second network edge device described MPLS message is carried out decapsulation process obtain described tdm traffic.
The transmitting device of time multiplexing date the most according to claim 6, it is characterised in that described
First processing module includes:
First processing unit, for described tdm traffic is carried out demultiplexing process, obtains E1 frame；
Second processing unit, for increasing described VLAN tag, Ethernet header and link in described E1 frame
Layer head, obtains described IP message.
The transmitting device of time multiplexing date the most according to claim 6, it is characterised in that described
MPLS label includes: PW label and the tunnel label corresponding with described PW label；And
Described second processing module includes:
First searches unit, in the PW routing table pre-saved, searches whether to exist with described
The PW label that VLAN tag is corresponding；
First acquiring unit, if in described PW routing table, existing corresponding with described VLAN tag
PW label, then obtain the PW label corresponding with described VLAN tag, and obtain and described PW label
Corresponding tunnel label.
The transmitting device of time multiplexing date the most according to claim 8, it is characterised in that described
Second processing module includes:
3rd processing unit, for peeling off the VLAN tag of described IP message, and by described tunnel label
With in described PW Tag Packaging to described IP message, obtain described MPLS message.
10. a network side edge device, it is characterised in that include as described in any one of claim 6-9
The transmitting device of time multiplexing date.
The transmission method of 11. 1 kinds of time multiplexing dates, is applied to first network lateral edges equipment, its feature
It is, including:
Obtain the multiprotocol label switching MPLS message that packet switching network PSN sends, described MPLS
Message is that user is needed to be sent to institute from the second network side edge device by described second network side edge device
State the tdm traffic of first network edge device to be packaged processing and obtain；
In the pseudo-wire PW routing table pre-saved, obtain and the MPLS entrained by described MPLS message
The VLAN tag that label is corresponding, and according to described VLAN tag, described MPLS message is packaged into IP
Message, described VLAN tag is used for identifying customer side edge device and described first network lateral edges equipment
The user's sidelinks set up；
Described IP message is carried out decapsulation process, obtains described tdm traffic, and pass through VLAN
Described tdm traffic is sent to the customer side edge device of correspondence by user's sidelinks of tag identifier.
The transmission method of 12. time multiplexing dates according to claim 11, it is characterised in that institute
State MPLS label to include: PW label and the tunnel label corresponding with described PW label；And
Described in the pseudo-wire PW routing table pre-saved, obtain and entrained by described MPLS message
The VLAN tag that MPLS label is corresponding, including:
In described PW routing table, search whether to exist and the PW mark entrained by described MPLS message
Sign corresponding VLAN tag；
If existing, then obtain the VLAN tag corresponding with the PW label entrained by described MPLS message.
The transmission method of 13. time multiplexing dates according to claim 12, it is characterised in that institute
State, according to described VLAN tag, described MPLS message is packaged into IP message, including:
Peel off the tunnel label in described MPLS message and PW label, and described VLAN tag is sealed
Install to, in described MPLS message, obtain described IP message.
The transmission method of 14. time multiplexing dates according to claim 11, it is characterised in that institute
Stating and described IP message is carried out decapsulation process, the step obtaining described tdm traffic includes:
In the VLAN routing table pre-saved, search whether to there is the VLAN entrained by described IP message
Label；
If existing, then peel off VLAN tag, Ethernet header and the link layer headers in described IP message,
To E1 frame；
Described E1 frame is carried out multiplexing process, obtains described tdm traffic.
The transmission method of 15. time multiplexing dates according to claim 11, it is characterised in that institute
State VLAN tag and include the first VLAN tag and the second VLAN tag；
Wherein, the 0bit-5bit of described first VLAN tag is used for indicating the length of message payload, the
6bit-10bit is used for identification message type of service, and 11bit is for indicating the direction of transfer of message, 12bit
Representing criteria field, 13bit-15bit is for representing the priority of message；
The 0bit-7bit of described second VLAN tag is for identifying the numbering of user's sidelinks, 8bit
For the polymeric type attribute of identification message business, 9bit-11bit is for representing that the physics of user's sidelinks connects
The numbering of mouth, 12bit represents criteria field, and 13bit-15bit is for representing the priority of message.
The transmitting device of 16. 1 kinds of time multiplexing dates, is applied to first network lateral edges equipment, its feature
It is, including:
Second acquisition module, for obtaining the multiprotocol label switching MPLS message that PSN network sends,
Described MPLS message is that user is needed to set from the second network side edge by described second network side edge device
The standby tdm traffic being sent to described first network edge device is packaged processing and obtains；
3rd processing module, in the pseudo-wire PW routing table pre-saved, obtains and described MPLS
The VLAN tag that MPLS label entrained by message is corresponding, and according to described VLAN tag by described
MPLS message is packaged into IP message, and described VLAN tag is used for identifying customer side edge device with described
User's sidelinks that first network lateral edges equipment is set up；
Fourth processing module, for described IP message is carried out decapsulation process, obtains described TDM number
According to stream, and described tdm traffic is sent to correspondence by the user's sidelinks identified by VLAN tag
Customer side edge device.
The transmitting device of 17. time multiplexing dates according to claim 16, it is characterised in that institute
State MPLS label to include: PW label and the tunnel label corresponding with described PW label；And
Described 3rd processing module includes:
Second searches unit, in described PW routing table, searches whether to exist and described MPLS
The VLAN tag that PW label entrained by message is corresponding；
Second acquisition unit, if in described PW routing table, existing and described MPLS message institute
The VLAN tag that the PW label that carries is corresponding, then obtain and the PW entrained by described MPLS message
The VLAN tag that label is corresponding.
The transmitting device of 18. time multiplexing dates according to claim 17, it is characterised in that institute
State the 3rd processing module to include:
Fourth processing unit, for peeling off the tunnel label in described MPLS message and PW label, and
Described VLAN tag is encapsulated in described MPLS message, obtains described IP message.
The transmitting device of 19. time multiplexing dates according to claim 17, it is characterised in that institute
State fourth processing module to include:
3rd searches unit, in the VLAN routing table pre-saved, searches whether that existence is described
VLAN tag entrained by IP message；
5th processing unit, if in described VLAN routing table, existing entrained by described IP message
VLAN tag, then peel off VLAN tag, Ethernet header and the link layer headers in described IP message,
To E1 frame；
6th processing unit, for described E1 frame is carried out multiplexing process, obtains described tdm traffic.
20. 1 kinds of network side edge devices, it is characterised in that include such as any one of claim 16-19 institute
The transmitting device of the time multiplexing date stated.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510359424.1A CN106330499A (en) | 2015-06-25 | 2015-06-25 | Time division multiplexing data transmission method and device, as well as network-side edge devices |
| PCT/CN2016/077783 WO2016206432A1 (en) | 2015-06-25 | 2016-03-30 | Time-division multiplexed data transmission method and device, and network-side edge device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510359424.1A CN106330499A (en) | 2015-06-25 | 2015-06-25 | Time division multiplexing data transmission method and device, as well as network-side edge devices |
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| CN106330499A true CN106330499A (en) | 2017-01-11 |
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| CN (1) | CN106330499A (en) |
| WO (1) | WO2016206432A1 (en) |
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| WO2021129749A1 (en) * | 2019-12-25 | 2021-07-01 | 中兴通讯股份有限公司 | Virtual local area network packet editing method and apparatus, electronic device, and computer readable medium |
| CN114258127A (en) * | 2020-09-25 | 2022-03-29 | 维沃移动通信有限公司 | Information determining method, information sending method, device and equipment |
| WO2022262614A1 (en) * | 2021-06-15 | 2022-12-22 | 华为技术有限公司 | Communication method, apparatus, and system |
| WO2022267875A1 (en) * | 2021-06-23 | 2022-12-29 | 华为技术有限公司 | Packet transmission method and related device |
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