CN102868610A

CN102868610A - Data transmission method and system as well as first provider edge router

Info

Publication number: CN102868610A
Application number: CN2012103301228A
Authority: CN
Inventors: 郑莲淑; 陈国义
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2012-09-07
Filing date: 2012-09-07
Publication date: 2013-01-09
Anticipated expiration: 2032-09-07
Also published as: WO2014036840A1; CN102868610B

Abstract

The embodiment of the invention discloses a data transmission method and system as well as a first provider edge (PE) router, relating to the technical field of communication. The problem that the high cost caused by establishing a data transmission channel by using an RRU (Remote Radio Unit) and a BBU (Base Band Unit) can be effectively reduced; and the maintenance cost can be effectively reduced. The implementation method provided by the invention comprises the following steps of: establishing a CPRI (Common Public Radio Interface) pseudo-wire the pseudo-wire type of which is a CPRI type through a first PE and a second PE; the PE is connected with an RRU; the second PE is connected with the BBU; the first PE and the second PE are located in an MPLS (Multiple Protocol Label Switching) network; and CPRI data between the RRU and the BBU can be transmitted through the CPRI pseudo-wire transmission. The embodiment of the invention is mainly used for a data transmission process between the RRU and the BBU.

Description

Data transmission method, the first provider edge router and system

Technical field

The present invention relates to communication technical field, relate in particular to a kind of data transmission method, the first provider edge router and system.

Background technology

In wireless communication system, the base station is comprised of a plurality of funtion parts, and wherein topmost two parts are Base Band Unit and radio frequency unit.Base Band Unit and the radio frequency unit of traditional base station integrate usually, cause the base station architecture sealing, are unfavorable for the separately technological progress in field of Base Band Unit and radio frequency unit.

In order to make the base station have open framework, a new generation adopts based on emulation common public radio interface (Common Public Radio Interface the base station, CPRI) technology, Base Band Unit and radio frequency unit are separated, baseband processing unit (the Base Band Unit that formation links to each other by optical fiber, BBU) and Remote Radio Unit (Radio Remote Unit, RRU), the partial carrier wave of base station is passed through the CPRI Interface realization distributed networking of standard, adopt to be exclusively used in the Optical Fiber Transmission BBU of CPRI transfer of data and the CPRI data between the RRU.

State in realization in the data transmission procedure based on CPRI, the inventor finds that there are the following problems at least in the prior art:

Owing to need between BBU and RRU, lay optical fiber, to be exclusively used in the CPRI transfer of data, when RRU disposes in a large number, can cause optical fiber to lay cost and optical fiber maintenance high cost, especially, when RRU is connected with a plurality of BBU, need RRU and a plurality of BBU to lay respectively optical fiber, it is higher that optical fiber is laid cost, in addition, also need respectively the optical fiber of laying to be safeguarded, maintenance cost sharply increases.

Summary of the invention

Embodiments of the invention provide data transmission method, the first provider edge router and system, are used for solution RRU and BBU set up data transmission channel by laying optical fiber optical fiber laying cost and the too high problem of maintenance cost.

For achieving the above object, embodiments of the invention adopt following technical scheme:

First aspect provides a kind of data transmission method, and described data transmission method comprises:

The first provider edge router (Provider Edge, PE) set up pseudo-line (Pseudo Wire with the 2nd PE, PW) type is the pseudo-line of CPRI of CPRI type, a described PE links to each other with RRU, described the 2nd PE links to each other with BBU, a described PE and described the 2nd PE are in multiprotocol label switching (Multi Protocol Label Switch), MPLS) in the network;

A described PE transmits CPRI data between described RRU and the described BBU by the pseudo-line of described CPRI.

In the possible implementation of the first of described first aspect, the pseudo-line of the CPRI that it is the common public radio interface CPRI type that a described PE and the 2nd PE set up pseudo-line type, comprise: a described PE sends the first pseudo line tag mapping message by described MPLS network to described the 2nd PE, the pseudo-line sign of CPRI that comprises a described PE in described the first pseudo line tag mapping message, the pseudo-line sign of the CPRI of described the 2nd PE and the first pseudo line tag, so that described the 2nd PE mates the pseudo-line sign of the CPRI of described the 2nd PE that comprises in described the first pseudo line tag mapping message, and after the match is successful, described the first pseudo line tag that comprises in described the first pseudo line tag mapping message is stored, as the pseudo line tag from described the 2nd PE to a described PE.

In the possible implementation of the first of described first aspect, the possible implementation of the second of described first aspect also is provided, in the possible implementation of the second of described first aspect, the pseudo-line of the CPRI that it is the common public radio interface CPRI type that a described PE and the 2nd PE set up pseudo-line type, also comprise: a described PE receives the second pseudo line tag mapping message that described the 2nd PE sends by described MPLS network, comprises the pseudo-line sign of CPRI of a PE in described the second pseudo line tag mapping message, the pseudo-line sign of the CPRI of described the 2nd PE and the second pseudo line tag; A described PE mates the pseudo-line sign of CPRI of a described PE who comprises in described the second pseudo line tag mapping message; If described the match is successful, a described PE is with described the second pseudo line tag storage that comprises in described the second pseudo line tag mapping message, as the pseudo line tag from a described PE to described the 2nd PE.

In above-mentioned any one possible implementation of described first aspect, the third possible implementation of described first aspect also is provided, in the third possible implementation of described first aspect, the pseudo-line of the CPRI that it is the common public radio interface CPRI type that a described PE and the 2nd PE set up pseudo-line type, also comprise: if described coupling is unsuccessful, a described PE sends the pseudo line tag release message by described MPLS network to described the 2nd PE.

In the third possible implementation of the possible implementation of the second of the possible implementation of the first of described first aspect or described first aspect or described first aspect, the 4th kind of possible implementation of described first aspect also is provided, in the 4th kind of possible implementation of described first aspect, describedly transmit CPRI data between described RRU and the described BBU by the pseudo-line of described CPRI, comprising: a described PE receives CPRI data of described RRU transmission; A described PE sends a CPRI message to described the 2nd PE, comprise described CPRI data and described the second pseudo line tag in the described CPRI message, so that described the 2nd PE gives described BBU with a described CPRI data retransmission behind described the second pseudo line tag of identification.

In the 4th kind of possible implementation of the third possible implementation of the possible implementation of the second of described first aspect or described first aspect or described first aspect, the 5th kind of possible implementation of described first aspect also is provided, in the 5th kind of possible implementation of described first aspect, describedly transmit CPRI data between described RRU and the described BBU by the pseudo-line of described CPRI, also comprise: a described PE receives the 2nd CPRI message that described the 2nd PE sends, and comprises the 2nd CPRI data and described the first pseudo line tag in described the 2nd CPRI message; After a described PE identifies described the first pseudo line tag, give described RRU with described the 2nd CPRI data retransmission.

Second aspect provides an a kind of PE, and a described PE comprises:

Pseudo-line is set up the unit, is used for the pseudo-line of CPRI that to set up pseudo-line type be the CPRI type with the 2nd PE, and a described PE links to each other with RRU, and described the 2nd PE links to each other with BBU, and a described PE and described the 2nd PE are in the multiprotocol label switching MPLS network;

Transmission unit is used for setting up the pseudo-line of the described CPRI that sets up the unit by described pseudo-line and transmits CPRI data between described RRU and the described BBU.

In the implementation possible in conjunction with the first of described second aspect, described pseudo-line is set up the unit and is comprised: set up subelement, be used for sending the first pseudo line tag mapping message by the MPLS network between a described PE and described the 2nd PE to described the 2nd PE, the pseudo-line sign of CPRI that comprises a described PE in described the first pseudo line tag mapping message, the pseudo-line sign of the CPRI of described the 2nd PE and the first pseudo line tag, so that described the 2nd PE mates the pseudo-line sign of the CPRI of described the 2nd PE that comprises in described the first pseudo line tag mapping message, and after the match is successful, described the first pseudo line tag is stored, as the pseudo line tag from described the 2nd PE to a described PE.

In the possible implementation of the first of described second aspect, the possible implementation of the second of described second aspect also is provided, in the possible implementation of the second of described second aspect, described pseudo-line is set up the unit and also comprised: first receives subelement, be used for receiving the second pseudo line tag mapping message that described the 2nd PE sends by described MPLS network, comprise the pseudo-line sign of CPRI and the second pseudo line tag of the pseudo-line sign of CPRI of a PE, described the 2nd PE in described the second pseudo line tag mapping message; The coupling subelement is used for mating the pseudo-line sign of CPRI of the described PE that described the second pseudo line tag mapping message comprises.The tag storage subelement, be used for when described coupling subelement when the match is successful, receive described the second pseudo line tag that comprises in the described second pseudo line tag mapping message of subelement reception with described first and store, as the pseudo line tag from a described PE to described the 2nd PE.

In above-mentioned any one possible implementation of described second aspect, the third possible implementation of described second aspect also is provided, in the third possible implementation of described first aspect, described pseudo-line is set up the unit and also comprised: label discharges subelement, be used for mating when unsuccessful when described coupling subelement, by described MPLS network to described the 2nd PE transmission pseudo line tag release message.

In the third possible implementation of the possible implementation of the second of the possible implementation of the first of described second aspect or described second aspect or described second aspect, the 4th kind of possible implementation of described second aspect also is provided, in the 4th kind of possible implementation of described second aspect, described transmission unit comprises: second receives subelement, is used for receiving CPRI data of the described RRU transmission that links to each other with a described PE; First sends subelement, be used for sending a CPRI message to described the 2nd PE, comprise in the described CPRI message by described second and receive described the second pseudo line tag that described CPRI data that subelement receives and described tag storage subelement obtain, so as described the 2nd PE will a described CPRI data retransmission behind described the second pseudo line tag of identification to described BBU.

In the third possible implementation of the possible implementation of the second of the possible implementation of the first of described second aspect or described second aspect or described second aspect, the 4th kind of possible implementation of described second aspect also is provided, in the 4th kind of possible implementation of described second aspect, described transmission unit also comprises: the 3rd receives subelement, be used for receiving the 2nd CPRI message that described the 2nd PE sends, comprise the 2nd CPRI data and described the first pseudo line tag in described the 2nd CPRI message; Second sends subelement, is used for identifying described the first pseudo line tag, and will receive described the 2nd CPRI data retransmission of subelement reception to described RRU by the described the 3rd.

The third aspect provides a kind of data transmission system, and described data transmission system comprises: the first provider edge router PE, the 2nd PE, radio frequency remote unit RRU and baseband processing unit BBU; A described PE links to each other with radio frequency remote unit RRU, and described the 2nd PE links to each other with baseband processing unit BBU, and a described PE and described the 2nd PE are in the multiprotocol label switching MPLS network, wherein,

A described PE comprises:

The first pseudo-line is set up the unit, is used for the pseudo-line of CPRI that to set up pseudo-line type be the common public radio interface CPRI type with described the 2nd PE;

The first transmission unit is used for setting up the pseudo-line of the described CPRI that sets up the unit by the described first pseudo-line and transmits CPRI data between described RRU and the described BBU;

Described the 2nd PE comprises:

The second pseudo-line is set up the unit, is used for setting up the pseudo-line of described CPRI with a described PE;

The second transmission unit is used for setting up the pseudo-line of the CPRI that sets up the unit by the described second pseudo-line and transmits CPRI data between described RRU and the described BBU;

Described RRU comprises:

The first transmitting element is used for sending the CPRI data by a described PE and described the 2nd PE to described BBU;

The first receiving element is used for receiving the CPRI data that described BBU sends by described the 2nd PE and a described PE;

Described BBU comprises:

The second transmitting element is used for sending the CPRI data by described the 2nd PE and a described PE to described RRU;

The second receiving element is used for receiving the CPRI data that described RRU sends by a described PE and described the 2nd PE.

The data transmission method that the embodiment of the invention provides, the one PE and system, by the pseudo-line of a PE and described the 2nd PE CPRI that to set up pseudo-line type be CPRI, the one PE is linked to each other with BBU with RRU respectively with the 2nd PE, transmit CPRI data between described RRU and the described BBU by the pseudo-line of described CPRI, and prior art is by the special optical fiber of laying between BBU and RRU, the technology that is used for the CPRI data between transmission RRU and the BBU is compared, can utilize the transmission line between a PE and the 2nd PE to set up the CPRI interface of emulation, multiplexing PE and can bearing multiple service the MPLS network of transmission, to realize the CPRI transfer of data, need between RRU and BBU, not lay special-purpose optical fiber, reduced and aimed at the laying cost of laying optical fiber between BBU and the RRU, in addition, utilize the maintenance technology of MPLS network maturation can effectively reduce maintenance cost when carrying out the CPRI transfer of data between BBU and the RRU.

Description of drawings

In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is a kind of data transmission method schematic flow sheet in the embodiment of the invention;

Fig. 2 is a kind of data circulation schematic diagram in the embodiment of the invention;

Fig. 3 is the first implementation schematic flow sheet of data transmission method shown in Figure 1;

Fig. 4 is the schematic flow sheet of the second implementation of data transmission method shown in Figure 1;

Fig. 5 is the schematic flow sheet of the third implementation of data transmission method shown in Figure 1;

Fig. 6 is the schematic flow sheet of the 4th kind of implementation of data transmission method shown in Figure 1;

Fig. 7 is a kind of PE structural representation in the embodiment of the invention;

Fig. 8 is the structural representation of a kind of implementation of a PE shown in Figure 7;

Fig. 9 is another kind the one PE structural representation in the embodiment of the invention;

Figure 10 is that a kind of data transmission system in the embodiment of the invention forms schematic diagram.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.

Referring to Fig. 1, the embodiment of the invention provides a kind of data transmission method, and described method comprises:

101, the pseudo-line of a PE and the 2nd PE CPRI that to set up pseudo-line type be the CPRI type, a described PE links to each other with radio frequency remote unit RRU, and described the 2nd PE links to each other with baseband processing unit BBU, and a described PE and described the 2nd PE are in the MPLS network.

The pseudo-line of the CPRI that it is the CPRI type that a described PE and the 2nd PE set up pseudo-line type needs the support of MPLS network, the pseudo-line of the CPRI that sets up is used for the CPRI data between transmission RRU and the BBU, certainly the pseudo-line that can also set up other types in the MPLS network is used for the business datum of transmission other types, and the embodiment of the invention is not done restriction to this.Described RRU can be that RRU is connected with a PE with the method that BBU is connected with a PE or the 2nd PE respectively, and BBU is connected with the 2nd PE; Also can be that BBU is connected with a PE, RRU be connected with the 2nd PE.Concrete, RRU and BBU can pass through AC (Attachment Circuit, AC) and be connected to the pseudo-line of described CPRI, are linked in the MPLS network.

For example, as shown in Figure 2, RRU links to each other by AC with a PE, and BBU links to each other by AC with the 2nd PE, sets up by the pseudo-line of the CPRI of a PE to the two PE directions and by the pseudo-line of the CPRI of the 2nd PE to a PE direction.Because a PE and the 2nd PE be in the MPLS network, so RRU and BBU also are linked in the MPLS network by being connected to CPRI puppet line.Be understandable that, the position of RRU and BBU also can exchange among Fig. 2, and the present embodiment repeats no more.

Certainly, can also set up the transfer of data that other pseudo-lines are used for other equipment that a PE is connected with the 2nd PE between a PE and the 2nd PE, and the CPRI that sets up in embodiment of the invention puppet line is applicable to transmit the CPRI data between described RRU and the BBU.

102, a described PE transmits CPRI data between described RRU and the described BBU by the pseudo-line of described CPRI.

Wherein, the CPRI data between described RRU and the described BBU can be the CPRI data that RRU is sent to BBU, also can be the CPRI data that BBU is sent to RRU.The designated lane that the pseudo-line of described CPRI is the described CPRI data of transmission namely utilizes a PE and the pseudo-line of the CPRI between the 2nd PE set up, transmits the CPRI data between described RRU and the described BBU.

The data transmission method that the embodiment of the invention provides, by the pseudo-line of a PE and described the 2nd PE CPRI that to set up pseudo-line type be the CPRI type, with a PE and the 2nd PE respectively with RRU and BBU, transmit CPRI data between described RRU and the described BBU by the pseudo-line of described CPRI, and prior art is by the special optical fiber of laying between BBU and RRU, the technology that is used for the CPRI data between transmission RRU and the BBU is compared, can utilize the transmission line between a PE and the 2nd PE to set up the CPRI interface of emulation, multiplexing PE and can bearing multiple service the MPLS network of transmission, to realize the CPRI transfer of data, need between RRU and BBU, not lay special-purpose optical fiber, reduced and aimed at the laying cost of laying optical fiber between BBU and the RRU, in addition, utilize the maintenance technology of MPLS network maturation can effectively reduce maintenance cost when carrying out the CPRI transfer of data between BBU and the RRU.

Referring to Fig. 2, the embodiment of the invention also provides another kind of data transmission method, and described another kind of data transmission method is the refinement for the described data transmission method of Fig. 1, and described another kind of data transmission method comprises:

201, a PE sends the first pseudo line tag mapping message by the MPLS network to described the 2nd PE.

Wherein, described the first pseudo line tag mapping message comprises the CPRI type, the pseudo-line sign of the CPRI of a described PE, the pseudo-line sign of the CPRI of described the 2nd PE and the first pseudo line tag, so that described the 2nd PE mates the pseudo-line sign of described the 2nd PE that comprises in described the first pseudo line tag mapping message, namely the 2nd PE mates the pseudo-line sign of the described PE that comprises in the first pseudo line tag mapping message with the upper pre-stored pseudo-line sign of the 2nd PE, if the match is successful, then the 2nd PE is described the first pseudo line tag storage that comprises in described the first pseudo line tag mapping message, as the pseudo-line type pseudo-line of CPRI that is the CPRI type from described the 2nd PE to a described PE pseudo line tag.Like this, when follow-up the 2nd PE sends the CPRI message for a PE again, just can carry this first pseudo line tag in the CPRI message, a PE just can send to the CPRI data in the message RRU corresponding to the pseudo-line of this CPRI when receiving the CPRI message that carries this first pseudo line tag.Wherein, the pseudo-line sign of the CPRI of described the 2nd PE that comprises in described the first pseudo line tag mapping message is that a PE obtains in advance and stores, can carry out the pseudo-line sign of CPRI that manual configuration obtains described the 2nd PE to a PE, also can be a PE obtains described the 2nd PE by dynamic learning the pseudo-line sign of CPRI.

Need to prove, described the first pseudo line tag mapping message comprises forwarding equivalence class type lengths values (Forwarding Equivalence Class Type Length Value, FEC TLV) and label TLV.Comprise pseudo line tag among the label TLV corresponding with described the first pseudo line tag of the embodiment of the invention, comprise FEC unit (FEC Element) among the FEC TLV.When the first pseudo line tag mapping message adopts general pseudo-line sign FEC unit, the FEC unit comprises source access sign (Source Access Identifier, SAI) and destination access sign (Target Access Identifier, TAI), when a PE was sent as the pseudo line tag mapping message to the 2nd PE, SAI was corresponding with the pseudo-line sign of CPRI of the pseudo-line sign of the CPRI of a PE and the 2nd PE respectively with TAI; When the 2nd PE sent the pseudo line tag mapping message to a PE, SAI was corresponding with the pseudo-line sign of CPRI of the pseudo-line sign of the CPRI of the 2nd PE and a PE respectively with TAI.When the first pseudo line tag mapping message adopted pseudo-line sign FEC unit, the FEC unit comprised pseudo-line sign (Pseudo Wire Identification, PW ID).The pseudo-line sign of the CPRI of a described PE and the 2nd PE is identical, i.e. PW ID.At this moment, only comprise the pseudo-line sign of a CPRI in the described pseudo line tag map information.When the 2nd PE receives described pseudo line tag mapping message, the pseudo-line sign of CPRI is compared with all pseudo-line signs of local storage, there is the pseudo-line sign of CPRI, then the match is successful, the pseudo-line of described CPRI and the binding of the pseudo-line sign of the CPRI of the 2nd PE end, CPRI puppet line has also been set up corresponding relation with AC between the RRU that the 2nd PE links to each other simultaneously.

202, described the 2nd PE receives described the first pseudo line tag mapping message that a described PE sends by described MPLS network, and described the first pseudo line tag mapping message comprises the pseudo-line sign of CPRI of a described PE and the pseudo-line sign of CPRI and the first pseudo line tag of described the 2nd PE.

203, described the 2nd PE mates the pseudo-line sign of CPRI of described the 2nd PE that comprises in described the first pseudo line tag mapping message.If described the match is successful, then execution in step 204; If described coupling is unsuccessful, then execution in step 205.

Wherein, after described the first pseudo line tag mapping message arrives described the 2nd PE, the 2nd PE checks pseudo-line signs all in the local storage of the 2nd PE, and all pseudo-line signs can comprise other CPRI access signs different from the pseudo-line sign of CPRI of the pseudo-line sign of the CPRI of a PE and the 2nd PE in the described local storage.The pseudo-line sign of CPRI that local all CPRI of the 2nd PE is accessed described the 2nd PE that comprises in sign and described the first pseudo line tag mapping message compares, if in the local storage of described the 2nd PE, find the CPRI access sign identical with the pseudo-line sign of CPRI of described the 2nd PE that comprises in described the first pseudo line tag mapping message, the marking matched success of the pseudo-line of the CPRI of described the 2nd PE that then comprises in described the first pseudo line tag mapping message of described coupling, the first pseudo line tag storage that this puppet line sign that comprises in the first pseudo line tag mapping message is corresponding, finish the CPRI access sign binding of the pseudo-line of CPRI and the 2nd PE end, thereby set up corresponding relation with RRU that the 2nd PE holds.If in the local storage of described the 2nd PE, do not find the pseudo-line sign identical with the pseudo-line sign of CPRI of described the 2nd PE that comprises in described the first pseudo line tag map information, the pseudo-line of the CPRI of described the 2nd PE that then comprises in described the first pseudo line tag mapping message of described coupling is marking matched unsuccessful, and the pseudo-line of CPRI does not identify binding with the CPRI access that the 2nd PE holds.

204, described the 2nd PE is with described the first pseudo line tag storage that comprises in described the first pseudo line tag mapping message, as the pseudo line tag from a described PE to described the 2nd PE.

Wherein, after described the 2nd PE mates the marking matched success of pseudo-line of a described PE who comprises in described the first pseudo line tag mapping message, described the first pseudo line tag that comprises in described the first pseudo line tag mapping message is stored in the memory cell of the 2nd PE, and described the first pseudo line tag that will store is as the pseudo line tag from a described PE to described the 2nd PE of the pseudo-line of CPRI.At this moment, the pseudo-line of described CPRI and the binding of the pseudo-line sign of the CPRI of the 2nd PE end, the pseudo-line of CPRI has also been set up corresponding relation with AC between the RRU that the 2nd PE links to each other simultaneously, is finished by the CPRI puppet line foundation of the 2nd PE to a PE direction.

205, described the 2nd PE sends the pseudo line tag release message by described MPLS network to a described PE.

Wherein, when described the 2nd PE mate the pseudo-line of described the 2nd PE that comprises in described the first pseudo line tag mapping message marking matched unsuccessful after, the 2nd PE does not store described the first pseudo line tag that comprises in described the first pseudo line tag mapping message, and send the pseudo line tag release message to a described PE, notify a described PE no longer to send described the first pseudo line tag mapping message to described the 2nd PE, can not set up the pseudo-line by the CPRI of the 2nd PE to a PE direction.

Need to prove, set up the pseudo-line of CPRI and comprise that foundation is from the pseudo-line of the CPRI of a PE to the two PE directions with from the pseudo-line of the CPRI of the 2nd PE to a PE direction.Foundation does not have sequencing from the pseudo-line of the CPRI of a PE to the two PE directions with from the pseudo-line of the CPRI of the 2nd PE to a PE direction.Wherein, step 201-205 is described to be that described pseudo-line by the 2nd PE to a PE direction is set up process, after the pseudo-line of described CPRI by the 2nd PE to a PE direction is set up and is finished, also need set up the pseudo-line by the CPRI of a PE to the two PE directions, as shown in Figure 4, described foundation by the process of setting up of the pseudo-line of the CPRI of a PE to the two PE directions as described in the step 206-210.

Be understandable that, because the pseudo line tag on each PE can configure in the local zone, therefore the first pseudo line tag described in the step 201-205 is identical with the second pseudo line tag possibility described in the step 206-210 also may be different, and the embodiment of the invention is not done restriction to this.

206, the 2nd PE sends the second pseudo line tag mapping message by the MPLS network to a described PE.

Wherein, described the second pseudo line tag mapping message comprises the pseudo-line sign of CPRI of a described PE and the pseudo-line sign of CPRI and the second pseudo line tag of described the 2nd PE, so that a described PE mates the pseudo-line sign of a described PE who comprises in described the second pseudo line tag mapping message, and after the match is successful with the described pseudo line tag storage that comprises in described the second pseudo line tag mapping message, as the pseudo line tag from a described PE to described the 2nd PE of the pseudo-line type pseudo-line of CPRI that is the CPRI type.The pseudo-line sign of the CPRI of a described PE who comprises in described the second pseudo line tag mapping message, can obtain by the 2nd PE being carried out manual configuration the pseudo-line sign of CPRI of a described PE, also can be the 2nd PE obtains a described PE by dynamic learning the pseudo-line sign of CPRI.

207, a described PE receives the second pseudo line tag mapping message that described the 2nd PE sends by described MPLS network, and described the second pseudo line tag mapping message comprises the pseudo-line sign of CPRI of a PE and the pseudo-line sign of CPRI and the second pseudo line tag of described the 2nd PE.

208, a described PE mates the pseudo-line sign of CPRI of a described PE who comprises in described the second pseudo line tag mapping message.If described the match is successful, then execution in step 209; If described coupling is unsuccessful, then execution in step 210.

Wherein, after described the second pseudo line tag mapping message arrives a described PE, the one PE checks pseudo-line signs all in the local storage of a PE, and the pseudo-line sign that has described in the described local storage can comprise other pseudo-line signs different from the pseudo-line sign of the pseudo-line sign of the CPRI of a PE and the 2nd PE.The pseudo-line sign of CPRI of a described PE who comprises in the pseudo-line sign that the one PE this locality is all and described the second pseudo line tag mapping message compares, if in the local storage of a described PE, find the pseudo-line sign identical with the pseudo-line sign of CPRI of the described PE that comprises in described the second pseudo line tag mapping message, the marking matched success of the pseudo-line of the CPRI of a described PE who then comprises in described the second pseudo line tag mapping message of described coupling; If do not find the pseudo-line sign identical with the pseudo-line sign of CPRI of the described PE that comprises in described the second pseudo line tag map information in the local storage of a described PE, the pseudo-line of the CPRI of a described PE who then comprises in described the second pseudo line tag mapping message of described coupling is marking matched unsuccessful.

209, a described PE is with described the second pseudo line tag storage that comprises in described the second pseudo line tag mapping message, as the pseudo line tag from a described PE to described the 2nd PE.

Wherein, after a described PE mates the marking matched success of pseudo-line of described the 2nd PE that comprises in described the second pseudo line tag mapping message, described the second pseudo line tag that comprises in described the second pseudo line tag mapping message is stored in the memory cell of a PE, and with described second pseudo line tag of the described storage pseudo line tag from a described PE to described the 2nd PE as the pseudo-line of described CPRI.At this moment, the pseudo-line of described CPRI and the binding of the pseudo-line sign of the CPRI of PE end, the pseudo-line of CPRI has also been set up corresponding relation with AC between the RRU that a PE links to each other simultaneously, and described pseudo-line foundation by the 2nd PE to a PE direction is finished.

210, a described PE sends the pseudo line tag release message by described MPLS network to described the 2nd PE.

Wherein, when a described PE mate the pseudo-line of a described PE who comprises in described the second pseudo line tag mapping message marking matched unsuccessful after, the one PE does not store the pseudo-line sign of CPRI of a described PE who comprises in described the second pseudo line tag mapping message, and send the pseudo line tag release message to described the 2nd PE, notify described the 2nd PE no longer to send described the second pseudo line tag mapping message to a described PE, can not set up the pseudo-line by the CPRI of a PE to the two PE directions.

In the present embodiment, after the pseudo-line of CPRI between a described PE and described the 2nd PE is successfully established, by the pseudo-line of the CPRI between a described PE and described the 2nd PE, can transmit the CPRI data, described transmission CPRI data, as shown in Figure 5, can be to send CPRI data by a PE to the 2nd PE, as described in step 211-215:

211, a described PE receives CPRI data of the described RRU transmission that links to each other with a described PE.

Wherein, because the pseudo-line of the CPRI between a described PE and the 2nd PE is set up, described RRU and described BBU are by the pseudo-line binding of the CPRI between AC and a described PE and the 2nd PE, and a described PE can directly receive by AC CPRI data of the described RRU transmission that links to each other with a described PE.

212, a described PE encapsulates described CPRI data and obtains a CPRI message.

Wherein, described encapsulation the one CPRI data can be by described CPRI data are stamped described the second pseudo line tag and packet switching network label, and described packet switching network label is convenient to a described CPRI message and is transmitted at the MPLS network.

213, a described PE sends a CPRI message to described the 2nd PE, comprise described CPRI data and described the second pseudo line tag in the described CPRI message, so that described the 2nd PE gives described BBU with a described CPRI data retransmission behind described the second pseudo line tag of identification.

214, described the 2nd PE receives the CPRI message that a described PE sends, and comprises described CPRI data and described the second pseudo line tag in the described CPRI message.

Wherein, when a CPRI message that sends to described the 2nd PE as a described PE arrives described the 2nd PE, described the 2nd PE receives the described CPRI message that a described PE sends, described the 2nd PE removes the packet switching network label of a described CPRI message, is only comprised a CPRI message of the second pseudo line tag and CPRI data.

215, described the 2nd PE identifies described the second pseudo line tag, and gives described BBU with a described CPRI data retransmission.

Need to prove, after the pseudo-line of CPRI between a described PE and described the 2nd PE is successfully established, by the pseudo-line of the CPRI between a described PE and described the 2nd PE, can transmit the CPRI data, described transmission CPRI data, as shown in Figure 6, can also be to send CPRI data by the 2nd PE to a PE, as described in step 216-220:

216, described the 2nd PE receives the 2nd CPRI data of the described RRU transmission that links to each other with described the 2nd PE.

Wherein, because the pseudo-line of the CPRI between a described PE and the 2nd PE is set up, described RRU and described BBU are by the pseudo-line binding of the CPRI between a described PE and the 2nd PE, and a described PE can directly receive by AC CPRI data of the described RRU transmission that links to each other with a described PE.

217, described the 2nd PE encapsulates described the 2nd CPRI data and obtains the 2nd CPRI message.

Wherein, described encapsulation the 2nd CPRI data can be by described the 2nd CPRI data are stamped described the first pseudo line tag and packet switching network label, and described packet switching network label is convenient to described the 2nd CPRI message and is transmitted at described MPLS network.

218, described the 2nd PE sends the 2nd CPRI message to a described PE, comprise described the 2nd CPRI data and described the first pseudo line tag in described the 2nd CPRI message, so that a described PE gives described CPRI data retransmission and described BBU behind described the first pseudo line tag of identification.

219, a described PE receives the 2nd CPRI message that described the 2nd PE sends, and comprises the 2nd CPRI data and described the first pseudo line tag in described the 2nd CPRI message.

Wherein, when the 2nd CPRI message that sends to a described PE as described the 2nd PE arrives a described PE, a described PE receives described the 2nd CPRI message that described the 2nd PE sends, a described PE removes the packet switching network label of described the 2nd CPRI message, is only comprised the 2nd CPRI message of the first pseudo line tag and the 2nd CPRI data.

220, a described PE identifies described the first pseudo line tag, and gives the described BBU that links to each other with a described PE with described the 2nd CPRI data retransmission.

The data transmission method that the embodiment of the invention provides, by the pseudo-line of a PE and described the 2nd PE CPRI that to set up pseudo-line type be the CPRI type, the one PE is linked to each other with BBU with RRU respectively with the 2nd PE, transmit CPRI data between described RRU and the described BBU by the pseudo-line of described CPRI, and prior art is by the special optical fiber of laying between BBU and RRU, the technology that is used for the CPRI data between transmission RRU and the BBU is compared, can utilize the transmission line between a PE and the 2nd PE to set up the CPRI interface of emulation, multiplexing PE and can bearing multiple service the MPLS network of transmission, to realize the CPRI transfer of data, need between RRU and BBU, not spread the special-purpose optical fiber of establishing, reduced and aimed at the laying cost of laying optical fiber between BBU and the RRU, in addition, utilize the maintenance technology of MPLS network maturation can effectively reduce maintenance cost when carrying out the CPRI transfer of data between BBU and the RRU.

Referring to Fig. 7, the embodiment of the invention also provides an a kind of PE30, and a described PE30 comprises: pseudo-line is set up unit 31, transmission unit 32.

Pseudo-line is set up unit 31, be used for the pseudo-line of CPRI that to set up pseudo-line type be the common public radio interface CPRI type with the 2nd PE, a described PE30 links to each other with radio frequency remote unit RRU, described the 2nd PE links to each other with baseband processing unit BBU, and a described PE30 and described the 2nd PE are in the MPLS network.

Transmission unit 32 is used for setting up the pseudo-line of the described CPRI that sets up unit 31 by described pseudo-line and transmits CPRI data between described RRU and the described BBU.

Need to prove, described RRU and described BBU are linked in the multiprotocol label switching MPLS network by the pseudo-line of described CPRI.

Further, as shown in Figure 8, described pseudo-line is set up unit 31 and can be comprised: set up subelement 311.

Set up subelement 311, be used for sending the first pseudo line tag mapping message by described MPLS network to described the 2nd PE, described the first pseudo line tag mapping message comprises the pseudo-line sign of CPRI and the first pseudo line tag of the pseudo-line sign of CPRI of a described PE30, described the 2nd PE, so that described the 2nd PE mates the pseudo-line sign of described the 2nd PE that comprises in described the first pseudo line tag mapping message, and after the match is successful, described the first pseudo line tag is stored, as the pseudo line tag from described the 2nd PE to a described PE30.

Further, as shown in Figure 8, described pseudo-line is set up unit 31 and can also be comprised: first receives subelement 312, coupling subelement 313, tag storage subelement 314.

First receives subelement 312, receive the second pseudo line tag mapping message that described the 2nd PE sends by described MPLS network, described the second pseudo line tag mapping message comprises the pseudo-line sign of CPRI and the second pseudo line tag of the pseudo-line sign of CPRI of a PE30, described the 2nd PE;

Coupling subelement 313, the pseudo-line sign of CPRI of mating a described PE30 who comprises in described the second pseudo line tag mapping message.

Tag storage subelement 314, be used for when described coupling subelement 313 when the match is successful, receive described the second pseudo line tag that comprises in the described second pseudo line tag mapping message of subelement 312 receptions with described first and store, as the pseudo line tag from a described PE30 to described the 2nd PE.

Further, as shown in Figure 8, described pseudo-line is set up unit 31 and can also be comprised: label discharges subelement 315.

Label discharges subelement 315, is used for sending the pseudo line tag release message by described MPLS network to described the 2nd PE when described coupling subelement 313 couplings are unsuccessful.

Further, as shown in Figure 8, described transmission unit 32 can comprise: second receives subelement 321, first sends subelement 322.

Second receives subelement 321, is used for receiving CPRI data of the described RRU transmission that links to each other with a described PE30.

First sends subelement 322, be used for sending a CPRI message to described the 2nd PE, comprise in the described CPRI message by described second and receive described the second pseudo line tag that described CPRI data that subelement 321 receives and described tag storage subelement 314 obtain, so as described the 2nd PE identify behind described the second pseudo line tag will a described CPRI data retransmission to described BBU.

Further, as shown in Figure 8, described transmission unit 32 can also comprise: the 3rd receives subelement 323, second sends subelement 324.

The 3rd receives subelement 323, is used for receiving the 2nd CPRI message that described the 2nd PE sends, and comprises the 2nd CPRI data and described the first pseudo line tag in described the 2nd CPRI message.

Second sends subelement 324, is used for identifying described the first pseudo line tag, and will receive described the 2nd CPRI data retransmission of subelement 323 receptions to described RRU by the described the 3rd.

Alternatively, a described PE 30 can be switch or router or other network equipments.

Alternatively, the pseudo-line of the described PE30 that provides of the embodiment of the invention is set up unit 31, transmission unit 32 can be merged into one or more unit; What described pseudo-line set up that unit 31 comprises first receives subelement 312, coupling subelement 313, tag storage subelement 314 and label and discharges subelement 315 and can merge into one or more unit; The second reception subelement 321, first that described transmission unit 32 comprises sends subelement 322, the 3rd reception subelement 323 and second sends subelement 324 and can merge into one or more unit.

Referring to Fig. 9, the embodiment of the invention also provides an another kind of PE40, and a described PE40 comprises: transmitter 41, processor 43, receiver 42 and memory 44.

Processor 43, be used for the pseudo-line of CPRI that to set up pseudo-line type be the common public radio interface CPRI type with the 2nd PE, a described PE40 links to each other with radio frequency remote unit RRU, described the 2nd PE links to each other with baseband processing unit BBU, and a described PE40 and described the 2nd PE are in the multiprotocol label switching MPLS network.

Transmitter 41 and receiver 42, the pseudo-line of described CPRI that is used for setting up by described processor 43 transmits the CPRI data between described RRU and the described BBU.

Wherein, between a described PE40 and described the 2nd PE, be provided with multiprotocol label switching MPLS network; Described RRU and described BBU are connected on the described CPRI data of transmission in the described MPLS network by the pseudo-line of described CPRI.

Further, described transmitter 41 also is used for: send the first pseudo line tag mapping message by the MPLS network between a described PE40 and described the 2nd PE to described the 2nd PE, the pseudo-line sign of CPRI that comprises a described PE40 in described the first pseudo line tag mapping message, the pseudo-line sign of the CPRI of described the 2nd PE and the first pseudo line tag, so that described the 2nd PE mates the pseudo-line sign of the CPRI of described the 2nd PE that comprises in described the first pseudo line tag mapping message, and after the match is successful, described the first pseudo line tag is stored, as the pseudo line tag from described the 2nd PE to a described PE40.

Described receiver 42, also be used for receiving the second pseudo line tag mapping message that described the 2nd PE sends by MPLS network between a described PE40 and described the 2nd PE, comprise the pseudo-line sign of CPRI and the second pseudo line tag of the pseudo-line sign of CPRI of a PE40, described the 2nd PE in described the second pseudo line tag mapping message.

Described processor 43 also is used for mating the pseudo-line sign of CPRI of the described PE40 that the second pseudo line tag mapping message that described receiver 42 receives comprises.

Described memory 44 is used for described the second pseudo line tag that comprises in described the second pseudo line tag mapping message being stored, as the pseudo line tag from a described PE40 to described the 2nd PE when described processor 43 when the match is successful.

Further, described transmitter 41 also is used for sending the pseudo line tag release message by described MPLS network to described the 2nd PE when the coupling of described processor 43 is unsuccessful.

Further, described receiver 42 is also for CPRI data that receive the described RRU transmission that links to each other with a described PE40; Described transmitter 41, also be used for sending a CPRI message to described the 2nd PE, comprise described CPRI data and described the second pseudo line tag in the described CPRI message, so that after described the 2nd PE identifies described the second pseudo line tag, give described BBU with a described CPRI data retransmission.

Further, described receiver 42 also is used for receiving the 2nd CPRI message that described the 2nd PE sends, and comprises the 2nd CPRI data and described the first pseudo line tag in described the 2nd CPRI message; Described processor 43 also is used for identifying described the first pseudo line tag; Described transmitter 41, also being used for will be by described the 2nd CPRI data retransmission to the described BBU that links to each other with a described PE40.

Alternatively, a described PE40 can be switch or router or other network equipments.

Alternatively, the transmitter 41 of an above-mentioned PE40, processor 43, receiver 42 and memory 44 can be integrated into one or more independently circuit or hardware, as: application-specific integrated circuit (ASIC) (English full name is Application Specific Integrated Circuit, and is English referred to as ASIC).

Need to prove, in the embodiment of the invention specific descriptions of partial devices can reference method embodiment in corresponding content, the embodiment of the invention is given unnecessary details here no longer one by one.

The PE40 that the embodiment of the invention provides, by the pseudo-line of a PE40 and described the 2nd PE CPRI that to set up pseudo-line type be the CPRI type, the one PE40 is linked to each other with BBU with RRU respectively with the 2nd PE, transmit CPRI data between described RRU and the described BBU by the pseudo-line of described CPRI, and prior art is by laying optical fiber between BBU and RRU, the technology that is used for the CPRI data between transmission RRU and the BBU is compared, can utilize the transmission line between a PE40 and the 2nd PE to set up the CPRI interface of emulation, multiplexing PE and can bearing multiple service the MPLS network of transmission, to realize the CPRI transfer of data, need between RRU and BBU, not lay special-purpose optical fiber, reduced and aimed at the laying cost of laying optical fiber between BBU and the RRU, in addition, utilize the maintenance technology of MPLS network maturation can effectively reduce maintenance cost when carrying out the CPRI transfer of data between BBU and the RRU.

Referring to Figure 10, the embodiment of the invention also provides a kind of data transmission system 50, described data transmission system 50 comprises a PE51, the 2nd PE52, RRU53 and BBU54, a described PE51 links to each other with RRU53, described the 2nd PE52 links to each other with BBU54, a described PE51 and described the 2nd PE52 are in the MPLS network, wherein

A described PE51 comprises: the first pseudo-line is set up unit 511, is used for the pseudo-line of CPRI that to set up pseudo-line type be the common public radio interface CPRI type with described the 2nd PE52; The first transmission unit 512 is used for setting up the pseudo-line of the described CPRI that sets up unit 511 by the described first pseudo-line and transmits CPRI data between described RRU53 and the described BBU54;

Described the 2nd PE52 comprises: the second pseudo-line is set up unit 521, is used for setting up the pseudo-line of described CPRI with a described PE51; The second transmission unit 522 is used for setting up the pseudo-line of the CPRI that sets up unit 521 by the described second pseudo-line and transmits CPRI data between described RRU53 and the described BBU54;

Described RRU53 comprises: the first transmitting element 531 is used for sending the CPRI data by a described PE51 and described the 2nd PE52 to described BBU54; The first receiving element 532 is used for receiving the CPRI data that described BBU54 sends by described the 2nd PE and a described PE;

Described BBU54 comprises: the second transmitting element 541 is used for sending the CPRI data by described the 2nd PE52 and a described PE51 to described RRU53; The second receiving element 542 is used for receiving the CPRI data that described RRU53 sends by a described PE51 and described the 2nd PE52.

In Figure 10, BBU54 links to each other with the 2nd PE52, and RRU53 links to each other with a PE51, sets up the pseudo-line of CPRI between a PE51 and the 2nd PE52.Certainly, the position of BBU53 and RRU54 also can exchange among Figure 10, and namely BBU54 links to each other with a PE51, and RRU53 links to each other with the 2nd PE52.

The data transmission system 50 that the embodiment of the invention provides, by the pseudo-line of a PE51 and described the 2nd PE52 CPRI that to set up pseudo-line type be the CPRI type, with a PE51 and the 2nd PE52 respectively with RRU53 and BBU54, transmit CPRI data between described RRU53 and the described BBU54 by the pseudo-line of described CPRI, and prior art is by the special optical fiber of laying between BBU and RRU, the technology that is used for the CPRI data between transmission RRU and the BBU is compared, can utilize the transmission line between a PE51 and the 2nd PE52 to set up the CPRI interface of emulation, multiplexing PE and can bearing multiple service the MPLS network of transmission, to realize the CPRI transfer of data, need between RRU53 and BBU54, not lay special-purpose optical fiber, reduced and aimed at the laying cost of laying optical fiber between BBU54 and the RRU53, in addition, utilize the maintenance technology of MPLS network maturation can effectively reduce maintenance cost when carrying out the CPRI transfer of data between BBU54 and the RRU53.

A PE who mentions in the embodiment of the invention, the first pseudo line tag, the first pseudo line tag mapping message, CPRI data, a CPRI message, first receive subelement, first and send subelement, the first pseudo-line and set up " first " in unit, the first transmission unit, the first transmitting element and the first receiving element and just be used for doing name identification, do not represent first on the order; The 2nd PE, the second pseudo line tag, the second pseudo line tag mapping message, the 2nd CPRI data, the 2nd CPRI message, second receive subelement, second and send subelement, the second pseudo-line and set up " second " in unit, the second transmission unit, the second transmitting element and the second receiving element and also just be used for doing name identification, do not represent second on the order.

One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforementioned program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: the various media that can be program code stored such as read-only memory (Read-only Memory, ROM), random access memory (Random-AccessMemory, RAM), magnetic disc or CD.

It should be noted that at last: above embodiment only in order to exemplary explanation technical scheme of the present invention, is not intended to limit; Although with reference to previous embodiment the beneficial effect that the present invention and the present invention bring is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the scope of claim of the present invention.

Claims

1. a data transmission method is characterized in that, comprising:

The pseudo-line of the CPRI that it is the common public radio interface CPRI type that the first provider edge router PE and the 2nd PE set up pseudo-line type, a described PE links to each other with radio frequency remote unit RRU, described the 2nd PE links to each other with baseband processing unit BBU, and a described PE and described the 2nd PE are in the multiprotocol label switching MPLS network;

2. data transmission method according to claim 1 is characterized in that, the pseudo-line of the CPRI that it is the common public radio interface CPRI type that described the first provider edge router PE and the 2nd PE set up pseudo-line type comprises:

A described PE sends the first pseudo line tag mapping message by described MPLS network to described the 2nd PE, the pseudo-line sign of CPRI and the first pseudo line tag that comprise the pseudo-line sign of CPRI of a described PE, described the 2nd PE in described the first pseudo line tag mapping message, so that described the 2nd PE mates the pseudo-line sign of the CPRI of described the 2nd PE that comprises in described the first pseudo line tag mapping message, and after the match is successful, described the first pseudo line tag that comprises in described the first pseudo line tag mapping message is stored, as the pseudo line tag from described the 2nd PE to a described PE.

3. data transmission method according to claim 2 is characterized in that, the pseudo-line of the CPRI that it is the common public radio interface CPRI type that described the first provider edge router PE and the 2nd PE set up pseudo-line type also comprises:

A described PE receives the second pseudo line tag mapping message that described the 2nd PE sends by described MPLS network, comprises the pseudo-line sign of CPRI and the second pseudo line tag of the pseudo-line sign of CPRI of a described PE, described the 2nd PE in described the second pseudo line tag mapping message;

A described PE mates the pseudo-line sign of CPRI of a described PE who comprises in described the second pseudo line tag mapping message;

If described the match is successful, a described PE is with described the second pseudo line tag storage that comprises in described the second pseudo line tag mapping message, as the pseudo line tag from a described PE to described the 2nd PE.

4. data transmission method according to claim 3 is characterized in that, the pseudo-line of the CPRI that it is the common public radio interface CPRI type that described the first provider edge router PE and the 2nd PE set up pseudo-line type also comprises:

If described coupling is unsuccessful, a described PE sends the pseudo line tag release message by described MPLS network to described the 2nd PE.

5. according to claim 2 to the described data transmission method of 4 arbitrary claims, it is characterized in that, describedly transmit CPRI data between described RRU and the described BBU by the pseudo-line of described CPRI, comprising:

A described PE receives the CPRI data that described RRU sends;

A described PE sends a CPRI message to described the 2nd PE, comprise described CPRI data and described the second pseudo line tag in the described CPRI message, so that described the 2nd PE gives described BBU with a described CPRI data retransmission behind described the second pseudo line tag of identification.

6. according to claim 3 to the described data transmission method of 5 arbitrary claims, it is characterized in that, describedly transmit CPRI data between described RRU and the described BBU by the pseudo-line of described CPRI, also comprise:

A described PE receives the 2nd CPRI message that described the 2nd PE sends, and comprises the 2nd CPRI data and described the first pseudo line tag in described the 2nd CPRI message;

After a described PE identifies described the first pseudo line tag, give described RRU with described the 2nd CPRI data retransmission.

7. a provider edge router PE is characterized in that, comprising:

Pseudo-line is set up the unit, be used for the pseudo-line of CPRI that to set up pseudo-line type be the common public radio interface CPRI type with the 2nd PE, a described PE links to each other with radio frequency remote unit RRU, described the 2nd PE links to each other with baseband processing unit BBU, and a described PE and described the 2nd PE are in the multiprotocol label switching MPLS network;

8. a PE according to claim 7 is characterized in that, described pseudo-line is set up the unit and comprised:

Set up subelement, be used for sending the first pseudo line tag mapping message by described PMPLS network to described the 2nd PE, the pseudo-line sign of CPRI and the first pseudo line tag that comprise the pseudo-line sign of CPRI of a described PE, described the 2nd PE in described the first pseudo line tag mapping message, so that described the 2nd PE mates the pseudo-line sign of the CPRI of described the 2nd PE that comprises in described the first pseudo line tag mapping message, and after the match is successful, described the first pseudo line tag is stored, as the pseudo line tag from described the 2nd PE to a described PE.

9. a PE according to claim 8 is characterized in that, described pseudo-line is set up the unit and also comprised:

First receives subelement, be used for receiving the second pseudo line tag mapping message that described the 2nd PE sends by described MPLS network, comprise the pseudo-line sign of CPRI and the second pseudo line tag of the pseudo-line sign of CPRI of a described PE, described the 2nd PE in described the second pseudo line tag mapping message;

The coupling subelement is used for mating the pseudo-line sign of CPRI of the described PE that described the second pseudo line tag mapping message comprises.

The tag storage subelement, be used for when described coupling subelement when the match is successful, receive described the second pseudo line tag that comprises in the described second pseudo line tag mapping message of subelement reception with described first and store, as the pseudo line tag from a described PE to described the 2nd PE.

10. a PE according to claim 9 is characterized in that, described pseudo-line is set up the unit and also comprised:

Label discharges subelement, be used for mating when unsuccessful when described coupling subelement, by described MPLS network to described the 2nd PE transmission pseudo line tag release message.

11. to the described PE of 10 arbitrary claims, it is characterized in that according to claim 8, described transmission unit comprises:

Second receives subelement, is used for receiving the CPRI data that described RRU sends;

First sends subelement, be used for sending a CPRI message to described the 2nd PE, comprise in the described CPRI message by described second and receive described the second pseudo line tag that described CPRI data that subelement receives and described tag storage subelement obtain, so as described the 2nd PE will a described CPRI data retransmission behind described the second pseudo line tag of identification to described BBU.

12. to the described PE of 11 arbitrary claims, it is characterized in that according to claim 9, described transmission unit also comprises:

The 3rd receives subelement, is used for receiving the 2nd CPRI message that described the 2nd PE sends, and comprises the 2nd CPRI data and described the first pseudo line tag in described the 2nd CPRI message;

Second sends subelement, is used for behind described the first pseudo line tag of identification, will receive described the 2nd CPRI data retransmission of subelement reception to described RRU by the described the 3rd.

13. a data transmission system is characterized in that, described data transmission system comprises the first provider edge router PE, the 2nd PE, radio frequency remote unit RRU and baseband processing unit BBU; A described PE links to each other with radio frequency remote unit RRU, and described the 2nd PE links to each other with baseband processing unit BBU, and a described PE and described the 2nd PE are in the multiprotocol label switching MPLS network, wherein,

A described PE comprises:

Described the 2nd PE comprises:

Described RRU comprises:

Described BBU comprises: