CN103107990A

CN103107990A - Medium conversion system and connection method thereof

Info

Publication number: CN103107990A
Application number: CN2013100167113A
Authority: CN
Inventors: 张春青
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2013-01-16
Filing date: 2013-01-16
Publication date: 2013-05-15
Anticipated expiration: 2033-01-16
Also published as: CN103107990B

Abstract

The invention provides a medium conversion system and a connection method of the medium conversion system, and aims at solving the problems that a large quantity of data is consumed in a protocol conversion process and an arrangement conversion process, and a large amount of time is wasted. The medium conversion system comprises a medium conversion box and an Iu interface based on an internet protocol (IP) medium, wherein the medium conversion box is used for realizing conversion between the IP medium and an asynchronous transfer mode (ATM) medium in a physical layer, and the Iu interface based on the IP medium is used for protocol conversion between an IP and an ATM. The medium conversion box comprises an IP port and an ATM port, wherein the IP port is a connecting port of the IP medium, and the ATM port is a connecting port of the ATM medium. The Iu interface based on the IP medium comprises a protocol stack. The protocol stack comprises a wireless network layer, a transmission network layer and the physical layer, wherein the wireless network layer and the transmission network layer are constructed according to an ATM protocol stack, the physical layer is constructed according to an IP protocol stack, and the IP port is arranged on the physical layer.

Description

A kind of change of medium system and attaching method thereof

Technical field

The present invention relates to the communication technology, particularly relate to a kind of change of medium system, and the method for attachment of a kind of change of medium system.

Background technology

at TD SDMA (Time Division-Synchronous Code Division MultipleAccess, TD-SCDMA) in system, core net (Core Network, CN) and radio network controller (Radio Network Controller, the composition of the Iu interface RNC) can be by ATM(Asynchronous Transfer Mode, asynchronous transfer mode) medium or IP(Internet Protocol, network interconnection agreement) medium composition, wherein, the ATM medium comprises: ATM dielectric and ATM light medium, the IP medium comprises: IP dielectric and IP light medium.

Two kinds of protocol stack differences that different media makes the Iu interface adopt, wherein, when the Iu interface was made of the ATM medium, the Iu interface adopted the ATM protocol stack; When the Iu interface was made of the IP medium, the Iu interface adopted IP stack.

With reference to Fig. 1, provided Iu interface ATM protocol stack schematic diagram in prior art.

With reference to Fig. 2, provided Iu interface IP stack schematic diagram in prior art.

Wherein, ATM protocol stack and IP stack all consist of by 3 layers, are respectively wireless network layer (RadioNetwork Layer), transport network layer (Transport Network Layer) and physical layer (PhysicalLayer).The physical layer of ATM protocol stack adopts the ATM medium, and the physical layer of IP stack adopts the IP medium.

Therefore when reality is used, because the Iu interface of the opposite equip. of CN and RNC may adopt different media, thereby cause occurring ATM medium and the interconnected scene of IP medium needs.Because medium is different, thereby the protocol stack that the Iu interface adopts is different, causes the Iu interface of equipment room directly to be communicated with.

In order to solve the above problems, designed a kind of protocol conversion Zhuan Ge, this protocol conversion Zhuan Ge supports two kinds of protocol stacks of Iu interface simultaneously, namely comprises simultaneously ATM protocol stack and IP stack.

With reference to Fig. 3, provided the protocol stack schematic diagram in the described protocol conversion Zhuan of prior art Ge.

In protocol conversion Zhuan Ge, adopt simultaneously ATM protocol stack and IP stack to realize wireless network layer, transport network layer and physical layer, wherein, described physical layer adopts ATM medium and IP medium simultaneously.

Therefore, when the Iu interface of the opposite equip. of CN and RNC adopts different media, the end of described protocol conversion Zhuan Ge can be connected the opposite equip. of RNC, the other end connects the opposite equip. of CN.Thereby realize the conversion of ATM agreement and IP agreement in protocol conversion Zhuan Ge, and the conversion of ATM medium and IP medium, and then the UNICOM that realizes CN and RNC.

But, owing to having realized the conversion of ATM agreement and IP agreement in described protocol conversion Zhuan Ge, therefore need a large amount of data of Pei Ge and service parameter in Gai Zhuan Ge, and need to carry out complicated protocol conversion process when carrying out conversion, Shuo Ju Pei Ge, processing and maintenance complexity very, need in conversion to expend a large amount of data, relatively lose time.

Summary of the invention

The embodiment of the present invention provides a kind of change of medium system, to need to expend a large amount of data, the problem of relatively losing time in resolution protocol Zhuan Huan Zhuan Ge conversion.

Accordingly, the embodiment of the present invention also provides the method for attachment of a kind of change of medium system.

In order to address the above problem, the invention discloses a kind of change of medium system, comprising:

The change of medium box is used for realizing the conversion of IP medium and ATM medium on physical layer; Wherein

Described change of medium box comprises: IP port and atm port, IP port are the connectivity port of IP medium, and atm port is the connectivity port of ATM medium;

Based on the Iu interface of IP medium, be used for carrying out the protocol conversion of ATM and IP, comprise protocol stack;

Described protocol stack comprises: wireless network layer, transport network layer and physical layer, and wherein, wireless network layer and transport network layer build according to the ATM protocol stack, and physical layer builds according to IP stack, and described physical layer Pei Ge has the IP port.

Optionally, described Iu interface also sends Pei Ge and asks to described change of medium box; Described change of medium box also according to Iu interface De Pei Ge Qing Qiu She Ge port, comprising: set up atm link, and the mapping relations of described atm link and IP port.

Optionally, described Pei Ge request comprises Pei Ge parameter, and described Pei Ge parameter comprises: Linktype, link identification, IP address and port value; Wherein, described Linktype is for the type of Pei Ge ATM Adaptation Layer; Described link identification is used for atm link of unique expression; Described IP address is specially the IP address that has the IP port of mapping relations with described atm link; Described port value is used for Pei Ge IP port.

Optionally, described change of medium box is also selected the type of ATM Adaptation Layer, and is created atm link according to link identification according to the Linktype in described Pei Ge parameter; And, according to described Linktype and port value, determine the IP port of described Iu interface side, and set up the mapping relations of described atm link and IP port according to described IP address.

Optionally, described change of medium box also sends connection request to described Iu interface; Described Iu interface also creates control channel according to the connection request that receives.

Optionally, described change of medium box also sends and the corresponding De Pei Ge response of described Pei Ge request, and whether Pei Ge is successful with feedback port; Whether described Iu interface also detects Pei Ge response by described control channel, and periodically detect described change of medium box and work.

Optionally, described Iu interface also according to described Pei Ge response, creates link-state list with the mapping relations of storage atm link and IP port.

Optionally, described system also comprises: core net and radio network controller, and wherein, described Iu Jie Kou Pei Ge is in core net, and Huo Pei Ge is in radio network controller.

Accordingly, the embodiment of the invention also discloses the method for attachment of a kind of change of medium system, adopt as above arbitrary described change of medium system, described change of medium system comprises change of medium box and Iu interface, described change of medium box comprises IP port and atm port, wherein the IP port of change of medium box is connected with the IP port of Iu interface, and described method comprises:

Described change of medium box receives described Iu interface and sends De Pei Ge request;

Described change of medium box is set up atm link according to described Pei Ge request;

Described change of medium box is set up the mapping relations of described atm link and IP port according to described Pei Ge request.

Optional ， Pei Ge request comprises Pei Ge parameter, and described Pei Ge parameter comprises: Linktype, link identification; Described change of medium box is set up the method for atm link according to described Pei Ge request, and comprising: described change of medium box is selected the type of ATM Adaptation Layer according to the Linktype in described Pei Ge parameter; Described change of medium box creates atm link according to described link identification.

Optional ， Pei Ge request comprises Pei Ge parameter, and described Pei Ge parameter comprises: IP address and port value; Described change of medium box is set up the method for the mapping relations of described atm link and IP port according to described Pei Ge request, and comprising: described change of medium box is determined the IP port of described Iu interface side according to described Linktype and port value; The described change of medium box described IP of foundation sets up the address mapping relations of described atm link and IP port.

Optionally, the change of medium box also comprises before receiving Pei Ge request: described change of medium box connection request is to described Iu interface.

The connection request of Iu interface receiver media boxcar;

The Iu interface sends Pei Ge request Yi Pei Ge port for described change of medium box according to described connection request.

Optionally, the Iu interface creates control channel according to described connection request; The described control channel of Iu interface employing detects responding with the corresponding De Pei Ge of described Pei Ge request of change of medium box transmission, and whether Pei Ge is successful with detection port; And whether the Iu interface adopts the described change of medium box of the periodic detection of described control channel to work.

Compared with prior art, the present invention includes following advantage:

At first, when the Iu interface of the opposite equip. of CN and RNC adopts different medium, the embodiment of the present invention can adopt the change of medium box to realize the conversion of IP medium and ATM medium on physical layer, and carry out the protocol conversion of ATM and IP in the Iu interface based on the IP medium, thereby realize interconnected between different medium, the Iu interface of equipment room is communicated with.Therefore and the change of medium box is realized conversion on physical layer, Xu Pei Ge and safeguard too much parameter not.In addition, in the protocol stack based on the Iu interface of IP medium, wireless network layer and transport network layer build according to the ATM protocol stack, and physical layer builds according to IP stack, and described physical layer Pei Ge has the IP port.Therefore, protocol conversion process is relatively simple, does not need in conversion to expend a large amount of data, relatively saves time.

Secondly, the embodiment of the present invention can be set up atm link in the change of medium box, and the mapping relations of described atm link and IP port, and is concrete, select the type of ATM Adaptation Layer according to the Linktype in described Pei Ge parameter, and create atm link according to link identification; And, according to described Linktype and port value, determine the IP port of described Iu interface side, and set up the mapping relations of described atm link and IP port according to described IP address.Thereby realize the mapping of Iu interface of the opposite equip. of CN and RNC, realize interconnected between different medium the Iu interface of equipment room being communicated with.

Again, in the embodiment of the present invention, the Iu interface also creates control channel according to the connection request that receives, thereby detect Pei Ge response by described control channel, and periodically detect described change of medium box and whether work, guarantee the normal connection of the Iu interface of equipment room, the assurance data are transmitted normally.

Again, in the embodiment of the present invention based on the Iu interface Ke Yi Pei Ge of IP medium in core net, also Ke Yi Pei Ge in radio network controller ， Pei Ge very flexibly, easy to use.

Description of drawings

Fig. 1 is Iu interface ATM protocol stack schematic diagram in prior art;

Fig. 2 is Iu interface IP stack schematic diagram in prior art;

Fig. 3 is the protocol stack schematic diagram in the described protocol conversion Zhuan of prior art Ge;

Fig. 4 is the described a kind of change of medium system construction drawing of the embodiment of the present invention;

Fig. 5 is the described a kind of change of medium system configuration schematic diagram of the embodiment of the present invention;

Fig. 6 is the described Duan Kou of embodiment of the present invention Pei Ge method flow diagram;

Fig. 7 is the Duan Kou Pei Ge method schematic diagram of the described scheme one of the embodiment of the present invention;

Fig. 8 is the Duan Kou Pei Ge method schematic diagram of the described scheme two of the embodiment of the present invention;

Fig. 9 is the described Iu Jie of embodiment of the present invention Kou Pei Ge flow chart;

Figure 10 is the described change of medium box of the embodiment of the present invention and Iu interface data communication scheme.

Embodiment

For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.

When reality is used, because the Iu interface of the opposite equip. of CN and RNC may adopt different media, thereby cause occurring ATM medium and the interconnected scene of IP medium needs.Because medium is different, thereby the protocol stack that the Iu interface adopts is different, causes the Iu interface of equipment room directly to be communicated with.

Wherein, in ATM protocol stack and IP stack, the bilingual of partial content is as follows:

Radio Access Network Application Part (Radio Access Network Application Part, RANAP), transmission network user face (Transport Network User Plane), signaling connection control protocol (Signal Connection Control Protocol, SCCP), broadband Message Transfer Part (Message Transport Part (broadband), MTP3B), service specific coordination function-Network-Node Interface (Service-Specific Coordination Function-Network to Network Interface, SSCF-NNI), Service Specific Connection Oriented Protocol (Service Specific Connection OrientedProtocol, SSCOP), transmission network chain of command (Transport Network Control Plane), the 3rd layer of user adaptation layer of MTP (MTP3-User Adaptation Layer M3UA), media transmission protocol (Media Transfer Protocol, MTP) SCTP (Stream ControlTransmission Protocol, SCTP), User Datagram Protoco (UDP) (User Datagram Protocol, UDP), upper-layer protocol layer (Iu UP Protocol layer) RTP/RTCP Real-time Transport Control Protocol (Real-time Transport Protocol/Real-time Transport Control Protocol, RTP/RTCP).

The embodiment of the present invention proposes a kind of change of medium system, in the time of can adopting different medium at the Iu interface of the opposite equip. of CN and RNC, realizes interconnected between different medium, thereby the Iu interface of equipment room is communicated with.Under this scene, in the opposite equip. of CN and RNC, one of them Iu interface adopts the ATM medium, and another Iu interface adopts the IP medium.

The below adopts the IP medium with the Iu interface of CN, and it is that example is specifically discussed that the Iu interface of RNC adopts the ATM medium:

With reference to Fig. 4, provided the described a kind of change of medium system construction drawing of the embodiment of the present invention.

With reference to Fig. 5, provided the described a kind of change of medium system configuration schematic diagram of the embodiment of the present invention.

Described change of medium system comprises: wherein, there are the Iu interface 21 based on the IP medium in change of medium box 1, CN2 and RNC3 in CN2.

Wherein, refer to based on the Iu interface 21 of IP medium, this Iu interface is made of the IP medium, and namely physical layer Pei Ge's is the IP port.

Wherein, described change of medium box 1 is used for realizing the conversion of IP medium and ATM medium on physical layer.Comprise: IP port one 1 and atm port 12, IP port one 1 is the connectivity port of IP medium, atm port 12 is the connectivity port of ATM medium.

Iu interface 21 is used for carrying out the protocol conversion of ATM and IP, comprises protocol stack.

Wherein, the protocol stack of Iu interface 21 comprises: wireless network layer L1, transport network layer L2 and physical layer L3.Wherein, wireless network layer L1, transport network layer L2 build according to the ATM protocol stack, and physical layer L3 builds according to IP stack, and physical layer L3 Pei Ge has the IP port.

In concrete enforcement, the physical layer L3 of the physical layer of change of medium box 1 and Iu interface 21 can adopt the UDP transmission means in the IP agreement.Change of medium box 1 can be realized the adaptive of atm port and IP port, completes the UDP mode to the forwarding of atm link, and above-mentioned all De Pei Ge control by the equipment (the present embodiment is CN2) at Iu interface 21 places and complete.Specific as follows:

1) create CN2 and change of medium box 1 De Pei Ge control designated lane

For the CN2 and the RNC3 that adopt different medium are communicated with, thereby being communicated with, the interior IP port of change of medium box 1 and atm port realize data interaction, namely to complete change of medium box 1 Pei Ge, specific as follows:

The connection request of Iu interface 21 receiver media boxcars 1; And Iu interface 21 sends Pei Ge request Yi Pei Ge port for described change of medium box 1 according to described connection request.

Concrete, after the connection request of Iu interface 21 receiver media boxcars 1, also create control channel according to described connection request.

Described control channel be CN2 to the Tong Xin Pei Ge passage of change of medium box 1, all Tong Dao Pei Ge instructions for change of medium box 1 are all issued by control channel by CN2.This control channel is used identical physical channel with the data between Iu interface 21 and change of medium box 1.

In actual treatment, for realizing that CN2 to change of medium box 1 De Pei Ge, at first will set up control channel at CN2 and 1, change of medium box.In embodiments of the present invention, control channel adopts the TCP connected mode, CN2 can be regarded as server end, change of medium box 1 can be regarded as client, CN2 can create a special watcher thread in initialization procedure, be responsible for monitoring the connection request on fixing port (concrete port number can at CN2 one Ce She Ge).After the port of monitoring is received the connection request of change of medium box 1, can create CN2 and be connected with TCP between change of medium box 1, thus the control channel of foundation, i.e. Socket passage.

2) Duan Kou Pei Ge

With reference to Fig. 6, provided the described Duan Kou of embodiment of the present invention Pei Ge method flow diagram.

Step 601, change of medium box 1 receive Iu interface 21 and send De Pei Ge request;

Change of medium box 1 is after sending connection request, can receive the 21 feedback De Pei Ge requests of Iu interface, there is Pei Ge parameter in described Pei Ge request, change of medium box 1 can be according to Gai Pei Ge request Pei Ge port, make the IP port in change of medium box 1 be connected with atm port connecting, thereby make CN2 and the RNC3 at change of medium box 1 two ends to be communicated with, realize data interaction.

Step 602, change of medium box 1 is set up atm link according to described Pei Ge request;

At first change of medium box 1 sets up atm link according to De Pei Ge parameter in Pei Ge request, thereby the data of atm port can be transmitted by this atm link.

Step 603, change of medium box 1 are set up the mapping relations of described atm link and IP port according to described Pei Ge request.

Change of medium box 1 is also set up the mapping relations of described atm link and IP port according to De Pei Ge parameter in Gai Pei Ge request, thereby make the data of atm port be transferred in corresponding IP port by atm link, thereby realize adopting the CN2 of different medium and the connection of RNC3.

Therefore in actual treatment, may need to create many atm links, need to send many Tiao Pei Ge request, after the Jun Pei Ge such as all atm links and port complete, can think Duan Kou Pei Ge success in the change of medium system, follow-uply just can carry out transfer of data.

Concrete, described Pei Ge request comprises Pei Ge parameter, described Pei Ge parameter comprises: Linktype, link identification, IP address and port value.

Wherein, described Linktype is for the type of Pei Ge ATM Adaptation Layer;

Described link identification is used for atm link of unique expression;

Described IP address is specially the IP address that has the IP port of mapping relations with described atm link;

Described port value is used for Pei Ge IP port.

Optionally, change of medium box 1 is set up the method for atm link according to described Pei Ge request, comprising:

Change of medium box 1 is selected the type of ATM Adaptation Layer according to the Linktype in described Pei Ge parameter; And create atm link according to described link identification.

Can affect the creation method of atm link due to different Linktypes, and can exert an influence to subsequent port De Pei Ge, therefore, at first will be according to the type of Linktype Pei Ge ATM Adaptation Layer (ATM AdaptationLayer, AAL), as AAL2, AAL5 etc.And then create atm link according to link identification.

Optionally, change of medium box 1 is set up the method for the mapping relations of described atm link and IP port according to described Pei Ge request, comprising:

Change of medium box 1 is determined the IP port of Iu interface 21 sides according to described Linktype and port value; And the change of medium box is set up the mapping relations of described atm link and IP port according to described IP address.

Different Linktypes can cause the compound method of IP port different, and for example, when adopting AAL5, the port value that the value of IP port can be in Pei Ge parameter is consistent; And during AAL2, the port value of the value of IP port in can Shi Pei Ge parameter add a certain threshold value and.

Change of medium box 1 is also set up the mapping relations of above-mentioned atm link and IP port according to the IP address, thereby when the atm port of change of medium box 1 receives data, can pass through this atm link the transmission of data, and then be mapped in corresponding IP port, send Iu interface 21 to.

In actual treatment, after control channel creates, CN2 can initiatively send Pei Ge request to change of medium box 1 by this control channel, change of medium box 1 creates atm link according to De Pei Ge parameter in described Pei Ge request, and create the udp port corresponding with this atm link, namely set up the mapping relations of described atm link and IP port.In actual treatment, physical layer adopts the UDP mode to transmit, so one of the specific implementation of IP port is udp port.

Wherein, the form of a kind of Pei Ge parameter of actual treatment can be as follows:

MsgID+LinkType+VPI+VCI+IP+Port；

1. request mark MsgID

Physical significance: identify the request ID(Identity in described Pei Ge request);

Data type: UINT8;

Value: 0x0a.

2. Linktype LinkType

The type of physical significance: Pei Ge ATM Adaptation Layer;

Data type: UINT8;

Value: { 0,1} identifies, and the AAL5 link is adopted in 0 expression, and the AAL2 link is adopted in 1 expression as adopting set.

Wherein, ATM Adaptation Layer is used for adaptive customer service.

3. virtual path identifier (Virtual Path identifier, VPI)

Data type: UINT8;

Value: [0,255].

4. Virtual Path Identifier (Virtual Channel Identifier, VCI)

Data type: UINT8;

Value: [0,255].

Wherein, VPI and VCI are the nouns of ATM transmission, and ATM is divided into several virtual logical paths to a physical circuit, is called VPI; Then divide virtual channel again in each VPI, be called VCI, VPI/VCI identifies a virtual connections together.

Therefore, can adopt VPI/VCI as a kind of link identification, with atm link of unique expression.

5. IP address

Physical significance: have the IP address of the IP port of mapping relations, i.e. the IP address of the CN side UDP passage corresponding with atm link with described atm link;

Data type: 4 UINT8 numerical value, 4 parts of storing IP address respectively

Value: for example IP address " 192.168.2.7 " to should message being exactly four continuous bytes, be respectively 0xc0,0xa8,0x02,0x07;

6. port value Port

Physical significance: Pei Ge IP port;

Data type: UINT16

Value: [1025,65535], more than or equal to 1025, and less than or equal to 65535 integer value.Port value less than or equal to 1024 is system's retention of operating system regulation.

Wherein, the LinkType value not simultaneously, the Linktype of concrete atm link is different, it is also different that corresponding end mouth is joined the Ge method.

For example, LinkType equals 0, i.e. AAL5 link, Port represent the port value to CN side UDP passage that should the AAL5 link.

And for example, LinkType equals 1, it is the AAL2 link, Port is illustrated under the AAL2 link, the port value of the corresponding CN side of atm link UDP passage is the Port+ threshold value, and when being cid as threshold value, the port value that is the corresponding CN side of the atm link UDP passage of i as cid is Port+i, be 255 as cid, the port value of the corresponding CN side of atm link UDP passage is Port+255.

Adopt above-mentioned De Pei Ge parameter, the length of parameter has 10 bytes, comprises VPI, the VCI that creates an atm link, the corresponding information such as UDP passage.

Above-mentioned description for Pei Ge parameter is only a kind of mode in concrete enforcement, according to the different ， Pei Ge parameters of actual conditions, different De Pei Ge methods may be arranged, and should not be understood as limitation of the present invention herein.

3) Pei Ge request responses

Optionally, change of medium box 1 also sends and the corresponding De Pei Ge response of described Pei Ge request, so that Duan Kou Pei Ge situation is informed Iu interface 21.

After change of medium box 1 receives Pei Ge request, create port according to De Pei Ge parameter in Pei Ge request, comprise atm link and IP port corresponding to this atm link.And, be responsible for preservation:

(1) mapping relations of atm link and change of medium box 1 side udp port, the i.e. mapping relations of atm link and IP port;

(2) mapping relations of change of medium box 1 side udp port and CN side udp port, the IP port of corresponding Iu interface side.

Follow-up, when the IU interface of CN2 and RNC3 carries out signaling and data interaction, all need to adopt this two mapping relations, thereby realize the mutual of ATM medium and IP medium.

Change of medium box 1 can send the establishment result that Pei Ge responds to notify this atm link of CN2 after completing port Pei Ge.

In Pei Ge response, a kind of form of response parameter is as follows:

MsgID+Status+IP+Port；

1. response identification MsgID

Physical significance: the response ID of Biao Shi Pei Ge response;

Data type: UINT8;

Value: 0x0b.

② Pei Ge result sign Status

Physical significance: Biao Shi Pei Ge response middle port De Pei Ge result;

Data type: UINT8;

Value: success or failure, represent successfully as 0, nonzero value represents various failure causes.

3. IP address

Physical significance: the IP address of the corresponding change of medium box of atm link 1 side UDP passage;

Data type: 4 UINT8;

Wherein, when Status is nonzero value, i.e. during failure, IP address field is meaningless.

4. port value Port

Physical significance: the port value of the corresponding change of medium box of atm link 1 side UDP passage.

Data type: UINT16

Value: [1025,65535], more than or equal to 1025, and less than or equal to 65535 integer value.

Above-mentioned description for response parameter is only a kind of mode in concrete enforcement, and according to the difference of actual conditions, response parameter may have different De Pei Ge methods, should not be understood as limitation of the present invention herein.

After Iu interface 21 receives the 1 feedback De Pei Ge response of change of medium box, can be according to the mapping relations of Gai Pei Ge response creation link-state list with storage atm link and IP port, maintenance link state.Link-state list is as shown in table 1:

ID	0	1	2	3
					Link VPI	3	3	4	4
Link VCI	53	54	53	54

Local terminal IP	192.168.2.1	192.168.2.1	192.168.2.1	192.168.2.1
					Local terminal Port	2000	2001	2003	2003
Far-end IP	Wait to insert	Wait to insert	Wait to insert	Wait to insert
					Far-end Port	Wait to insert	Wait to insert	Wait to insert	Wait to insert
Linktype	1	1	1	0
					The link purposes	The PS signaling	The CS signaling	The PS data	The CS data

Table 1

Wherein, local terminal IP, local terminal Port, far-end IP and far-end Port are corresponding to the IP port of change of medium box.Part to be inserted is inserted according to the Hang Pei Ge of Pei Ge response Jin.

In the embodiment of the present invention, a Tiao Pei Ge request only is used for atm link of Pei Ge, if therefore need many atm links of Pei Ge need send successively the Hang Pei Ge of Pei Ge request Jin.As totally two the AAL5 link (CS of signaling link in Iu interface office direction data in table 1, the PS territory each one), two (CS of data link, the PS territory each one), therefore CN2 can send 4 Tiao Pei Ge requests to change of medium box 1, only receive that in the corresponding De Pei of a Tiao Pei Ge request message Ge response Qie Pei Ge response, Status is that 0(represents Pei Ge success), just can send next Tiao Pei Ge request, until all four request full Bu Pei Ge success, 1 De Pei Ge finishes to the change of medium box, and the initialization procedure of CN2 successfully finishes, and CN enters normal operating phase.The response message of middle any Tiao Pei Ge request message is unsuccessful or wait-for-response message is overtime, all represents the failure to boxcar De Pei Ge, the initialization procedure failure of CN2, and CN2 has information and tells the user.

Linktype in upper table represents that this link is AAL2 or AAL5 type, and value is enumerated value, and the LinkType definition in Pei Ge request message is identical.Also it should be noted that, for CS numeric field data link, in namely showing, ID is 3 record, because be the AAL2 link, that finally distribute to each user is certain cid under this Path, in order to use a record to set up the ATM_UDP mapping relations of many cid under this Path, therefore the field " local terminal Port " of this record accurately physical significance be the cardinal extremity mouth of the mapping udp port of all cid under this Path.For instance, the field of this record in table " the local terminal Port of corresponding UDP passage " is 2004, namely notifying change of medium box VPI/VCI is that all cid corresponding to AAL2 link of 4/54 are all 256 cid paths of 0 to 255, and the CN side ports scope of corresponding UDP path is 2004 to 2259 one by one.If the change of medium box is to receive the data that RNC sends on 4/54/15 passage at VPI/VCI/cid like this, just can be by simple calculations: 2004+15=2019, find the far-end udp port, then being dealt into far-end IP is 192.168.2.1, and remote port is 2019 UDP passage.

The udp port value of the IP port of ， Pei Ge Iu interface side in concrete enforcement, and the method for the mapping relations of atm link and udp port value can be as follows:

Scheme one

With reference to Fig. 7, provided the Duan Kou Pei Ge method schematic diagram of the described scheme one of the embodiment of the present invention.

Wherein, RNC3 and change of medium box 1 adopt VPI/VCI to set up atm link, and change of medium box 1 and CN2 are by the UDP channel transmission data.

Concrete, the atm link in change of medium box 1 is corresponding one by one with atm link in RNC3, but all interior atm links of change of medium box 1 use unified udp port value to communicate by letter with CN2.The different udp port value of the corresponding CN2 side of different atm link is Base_Port as the corresponding CN2 side of the atm link udp port value of cid=0, and the corresponding CN2 side of the atm link of cid=1 udp port value is Base_Port+1, by that analogy.

Concrete, in the 1 feedback De Pei Ge response of change of medium box, the port value of change of medium box 1UDP passage is Port, after CN receives Pei Ge response message, remote port for each this side udp port: Base_Port+i is Port, has so just set up the two ends port mapping relation of UDP passage.Under this scheme, the both sides udp port is the relation of one-to-many.The change of medium box can be learnt the port numbers in source according to receiving the UDP message that CN sends, thereby finds the cid link of corresponding AAL2.In like manner, after receiving data from the cid link, the change of medium box also can be determined the peer port number of UDP passage, thereby uses the unique udp port value of this side as source udp port value, data to be sent.

Scheme two

With reference to Fig. 8, provided the Duan Kou Pei Ge method schematic diagram of the described scheme two of the embodiment of the present invention.

Concrete, the offside port of corresponding each UDP passage creates the udp port of a change of medium box side.After the change of medium box is received Pei Ge request message, can create successively the Socket of 256 local UDP types, the IP address of Socket should guarantee with request message in the IP address be a network segment, port range is that Base_Port1 is to Base_Port1+255.After whole Socket creates successfully, the change of medium box should be notified CN this side IP address in responding De Pei Ge response message, " Port " in response message (port value of change of medium box side UDP passage) should insert Base_Port1, after CN receives Pei Ge response message, the remote port that can obtain corresponding local terminal Port:Base_Port2+i according to simple calculating is Base_Port1+i, has so just set up the two ends port mapping relation of UDP passage.Under this scheme, the both sides udp port is man-to-man relation.

In the embodiment of the present invention, the method for attachment of change of medium system comprises in the processing of Iu interface:

The connection request of Iu interface receiver media boxcar; The Iu interface sends Pei Ge request Yi Pei Ge port for described change of medium box according to described connection request.

Wherein, a kind of processing method of Iu interface is as follows:

With reference to Fig. 9, provided the described Iu Jie of embodiment of the present invention Kou Pei Ge flow chart.

When being connected connection with the Iu interface by the discussion ， Pei Ge change of medium box 1 of above-described embodiment, specifically comprise following steps:

The Iu interface creates watcher thread first, monitored the message of change of medium box by watcher thread, watcher thread is after receiving connection request, Ge is joined in meeting establishment control channel and transmission to be asked to the change of medium box, then detect and whether receive Pei Ge and respond to detect whether successful Ruo Pei Ge failure of Pei Ge, Ze Pei Ge initialization failure flags receives the initialization failure.If join Ge success, detect whether there is the link of not joining Ge, if exist, continue to send and join Ge and ask to join Ge into row, if do not have, join the Ge initialization and successfully indicate, receive the initialization success.

Whether in the embodiment of the present invention, described Iu interface also detects Pei Ge response by described control channel, and periodically detect described change of medium box and work.

Whether the Iu interface can adopt heartbeat detection mechanism to monitor the state of change of medium box normal, after finding change of medium box operation irregularity, can be at once to reporting of user, and the user can grasp in the very first time operating state of change of medium box like this.CN can periodically send detect-message such as HeartBeat message to the change of medium box by the control channel of having set up, and wait for the feedback message that receives response, as HeartBeatAck message after successful Pei Ge change of medium box.The timing cycle interval of user Ke Yi Pei Ge timer.

Wherein, if the Iu interface is before overtime, if do not receive the HeartBeatAck message of change of medium box, just be designated as heartbeat failure, when the successive heartbeat frequency of failure surpasses certain preset value, Ke when (user Ke Yi She Ge preset value), thinks namely that irrecoverable error appears in the change of medium box take She Ge as ATM max-timeout number of times, can stop the monitoring for the change of medium box this moment, and report of user.

Wherein, HeartBeat information query change of medium box operating state, message format can for:

MsgID

Physical significance: the message id that identifies this message

Data type: UINT8

Value: 0x0c

Wherein, the message format of HeartBeatAck message can for:

MsgID

Physical significance: the message id that identifies this message

Data type: UINT8

Value: 0x0d

With reference to Figure 10, the described change of medium box of the embodiment of the present invention and Iu interface data communication scheme have been provided.

When being connected connection with the Iu interface by the discussion ， Pei Ge change of medium box 1 of above-described embodiment, specifically comprise following communication process:

10.1, the change of medium box sends connection request to CN;

10.2, CN creates control channel;

10.3, CN sends Pei Ge and asks to the change of medium box;

10.4, the change of medium box is according to Pei Ge request ， Pei Ge port;

10.5, the change of medium box sends Pei Ge and responds to CN;

10.6, CN periodically detects the operating state of change of medium box.

In embodiments of the present invention, can adopt the mode of IP to encapsulate the ATM message content between Iu interface and change of medium box, therefore in the Iu interface, remain by the ATM protocol stack and remove to resolve the ATM message content.

Above-described embodiment is the Iu interface employing IP medium with CN, it is that example is discussed that the Iu interface of RNC adopts the ATM medium, if the Iu interface of RNC adopts the IP medium, the Iu interface of CN adopts the ATM medium, only need and will get final product in the RNC side based on the Iu Jie Kou Pei Ge of IP medium, above-mentioned all also changed by the RNC execution by the performed operation of CN and get final product.Concrete grammar is discussed referring to above-described embodiment and is got final product, and repeats no more herein.

In sum, when the Iu interface of the opposite equip. of CN and RNC adopts different medium, the embodiment of the present invention can adopt the change of medium box to realize the conversion of IP medium and ATM medium on physical layer, and carry out the protocol conversion of ATM and IP in the Iu interface based on the IP medium, thereby realize interconnected between different medium, the Iu interface of equipment room is communicated with.Therefore and the change of medium box is realized conversion on physical layer, Xu Pei Ge and safeguard too much parameter not.In addition, in the protocol stack based on the Iu interface of IP medium, wireless network layer and transport network layer build according to the ATM protocol stack, and physical layer builds according to IP stack, and described physical layer Pei Ge has the IP port.Therefore, protocol conversion process is relatively simple, does not need in conversion to expend a large amount of data, relatively saves time.

Each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment that between each embodiment, identical similar part is mutually referring to getting final product.

The present invention can describe in the general context of the computer executable instructions of being carried out by computer, for example program module.Usually, program module comprises the routine carrying out particular task or realize particular abstract data type, program, object, assembly, data structure etc.Also can put into practice the present invention in distributed computing environment (DCE), in these distributed computing environment (DCE), be executed the task by the teleprocessing equipment that is connected by communication network.In distributed computing environment (DCE), program module can be arranged in the local and remote computer-readable storage medium that comprises memory device.

At last, also need to prove, in this article, relational terms such as the first and second grades only is used for an entity or operation are separated with another entity or operating space, and not necessarily requires or hint and have the relation of any this reality or sequentially between these entities or operation.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby make the process, method, commodity or the equipment that comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or also be included as the intrinsic key element of this process, method, commodity or equipment.In the situation that not more restrictions, the key element that is limited by statement " comprising ... ", and be not precluded within process, method, commodity or the equipment that comprises described key element and also have other identical element.

Above to a kind of change of medium provided by the present invention system, and the method for attachment of a kind of change of medium system, be described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.

Claims

1. a change of medium system, is characterized in that, comprising:

2. system according to claim 1, is characterized in that;

Described Iu interface also sends Pei Ge and asks to described change of medium box;

Described change of medium box also according to Iu interface De Pei Ge Qing Qiu She Ge port, comprising: set up atm link, and the mapping relations of described atm link and IP port.

3. system according to claim 2, is characterized in that, described Pei Ge request comprises Pei Ge parameter, and described Pei Ge parameter comprises: Linktype, link identification, IP address and port value; Wherein

Described Linktype is for the type of Pei Ge ATM Adaptation Layer;

Described link identification is used for atm link of unique expression;

Described port value is used for Pei Ge IP port.

4. system according to claim 3, is characterized in that;

Described change of medium box is also selected the type of ATM Adaptation Layer, and is created atm link according to link identification according to the Linktype in described Pei Ge parameter; And, according to described Linktype and port value, determine the IP port of described Iu interface side, and set up the mapping relations of described atm link and IP port according to described IP address.

5. system according to claim 2, is characterized in that;

Described change of medium box also sends connection request to described Iu interface;

Described Iu interface also creates control channel according to the connection request that receives.

According to claim 1 to 5 arbitrary described system, it is characterized in that;

Described change of medium box also sends and the corresponding De Pei Ge response of described Pei Ge request, and whether Pei Ge is successful with feedback port;

Whether described Iu interface also detects Pei Ge response by described control channel, and periodically detect described change of medium box and work.

7. system according to claim 6, is characterized in that, described Iu interface also according to described Pei Ge response, creates link-state list with the mapping relations of storage atm link and IP port.

8. system according to claim 7, is characterized in that, also comprises core net and radio network controller, and wherein, described Iu Jie Kou Pei Ge is in core net, and Huo Pei Ge is in radio network controller.

9. the method for attachment of a change of medium system, it is characterized in that, adopt as arbitrary in claim 1 to 8 described change of medium system, described change of medium system comprises change of medium box and Iu interface, described change of medium box comprises IP port and atm port, wherein the IP port of change of medium box is connected with the IP port of Iu interface, and described method comprises:

10. method according to claim 9, is characterized in that ， Pei Ge request comprises Pei Ge parameter, and described Pei Ge parameter comprises: Linktype, link identification;

Described change of medium box is set up the method for atm link according to described Pei Ge request, comprising:

Described change of medium box is selected the type of ATM Adaptation Layer according to the Linktype in described Pei Ge parameter;

Described change of medium box creates atm link according to described link identification.

11. method according to claim 9 is characterized in that ， Pei Ge request comprises Pei Ge parameter, described Pei Ge parameter comprises: IP address and port value;

Described change of medium box is set up the method for the mapping relations of described atm link and IP port according to described Pei Ge request, comprising:

Described change of medium box is determined the IP port of described Iu interface side according to described Linktype and port value;

The described change of medium box described IP of foundation sets up the address mapping relations of described atm link and IP port.

12. method according to claim 10 is characterized in that, the change of medium box also comprises before receiving Pei Ge request:

Described change of medium box connection request is given described Iu interface.

13. the method for attachment of a change of medium system, it is characterized in that, adopt as arbitrary in claim 1 to 8 described change of medium system, described change of medium system comprises change of medium box and Iu interface, described change of medium box comprises IP port and atm port, wherein the IP port of change of medium box is connected with the IP port of Iu interface, and described method comprises:

The connection request of Iu interface receiver media boxcar;

14. method according to claim 13 is characterized in that, also comprises:

The Iu interface creates control channel according to described connection request;

The described control channel of Iu interface employing detects responding with the corresponding De Pei Ge of described Pei Ge request of change of medium box transmission, and whether Pei Ge is successful with detection port; And

Whether the Iu interface adopts the described change of medium box of the periodic detection of described control channel to work.