CN100531227C

CN100531227C - Method for interface communication between wireless network controller and base station

Info

Publication number: CN100531227C
Application number: CNB2006100870857A
Authority: CN
Inventors: 朱伟; 申纪伟
Original assignee: Huawei Technologies Co Ltd
Current assignee: XFusion Digital Technologies Co Ltd
Priority date: 2006-06-16
Filing date: 2006-06-16
Publication date: 2009-08-19
Anticipated expiration: 2026-06-16
Also published as: CN1968287A

Abstract

The invention relates to an interface communication method between wireless network controller and base station, wherein the interfaces (Iub interfaces) between wireless network controller and base station use IP transmission network as support; and the method comprises that: wireless network controller obtains the projections between the IP address, user data pack protocol port of Node B, and the IP address and user data pack protocol port provided by network address converter; the wireless network controller based on said projection communicates with Node B. The invention can confirm normal communication of Iub interface when Node B uses private IP address.

Description

Method for interface communication between a kind of radio network controller and the base station

Technical field

The present invention relates to communication field, specifically relate to a kind of IP of use transmission network as method for interface communication between radio network controller that carries and the base station.

Background technology

Along with broadband CDMA system (Wideband Code Division Multiple Access System, abbreviation WCDMA system) continuous evolution, and the high speed development of IP broadband networks, use the IP transmission not only can effectively improve the bandwidth of Iub interface as the carrying of the physical interface (Iub interface) between RNC and the Node B, reduce the cost of transmission, and because at any website, the IP transfer resource all can obtain very easily, so, adopt and use the Iub interface carrying of IP transmission as carrying, can improve the flexibility that transfer resource obtains greatly, reduce the difficulty of web construction.

Yet, because the communications protocol of WCDMA of the prior art system itself is not all considered the network address translation application of (Net Address Translation is called for short NAT), therefore, there are following two kinds of situations in Iub interface for using the IP transmission network as carrying:

First kind of situation, (be responsible for the logical node of wireless receiving and transmission if be used for as the IP network and the Node B of Iub interface carrying, also claim the base station) all support the public network IP address agreement, the IP address that Node B obtains is a public network address, so Node B need not by NAT can be directly and RNC carry out communication, in this case, the communications protocol of the WCDMA system of prior art can be directly used in the communication of Iub interface.

Second kind of situation, because public network IP address resources lacks, expense costliness, existing IP transmission network generally adopt uses the IP network of private IP address to be connected with public network by NAT, realizes the mode of IP communication.For this kind situation, if can't distribute public network IP address for Node B, so, Node B can only obtain private IP address, so, any message by this Node B transmission, all need the nat feature by the IP transmission system, the private IP address with in the message header is converted to public network IP address, information could be sent to radio network controller (the Radio Network Controller that has public network IP address, be called for short RNC), carry out communication with RNC, so, in this case, can not directly use the communications protocol of the WCDMA system of prior art at Iub interface.

Below specify under second kind of situation, directly use the communications protocol of the WCDMA system of prior art will cause problem how:

In the WCDMA system, the foundation and the configuration of user's face of Iub interface specifically according to the IP address of the required user's of foundation face that carries in the signaling message content and UDP Port number, are set up and are disposed.

After signaling plane is finished alternately, begin to set up user's face and connect, after the successful connection of user's face was set up, RNC and Node B began to carry out according to signaling the transmission of user data package.The response signaling message of receiving for RNC is that example is specifically analyzed, this response signaling message is the signaling message that is sent by Node B, what carry in the signaling message content is the IP address of Node B local terminal and User Datagram Protocol port (User Datagram Protocol Port is called for short UDP Port) number.After RNC receives this response signaling message,, set up user's face according to the IP address in the message, UPD Port number.

After user's face is set up, discuss according to the difference of the direction of user data package transmission:

At first, issue the direction of user data package to Node B according to signaling message for RNC, specifically be, RNC is according to the signaling message content, and the purpose IP address in the data packet message head, purpose UDPPort extend this as respectively: the IP address in the signaling message content, UDP Port number.Because the IP address of the Node B in this signaling message content is a private IP address, and the network at RNC place is the network of use public network IP address, so RNC can not successfully send to the user data package that will send the UDP Port of the Node B of this IP address, UPD Port correspondence.As seen, use existing mechanics of communication agreement, RNC and the Node B that uses private IP address can not normal communications.

Secondly, send the direction of user data package to RNC for Node B, because the source IP address of the message header of this user data package is privately owned IP address, after this packet sends from Node B, when being the Iub interface of carrying through the IP transmission network, must use nat feature, when first user data package of Node B is passed through NAT, NAT is the IP address of a public network of this link assignment and UDP Port number, and with the source IP address in the data packet message head (private IP address of Node B), UDP Port number (the UDP Port of Node B number) converts the IP address of the public network that NAT provides to, the UDPPort that NAT provides number.Therefore, the IP address of the public network that the source IP address of the message header of the user data package that RNC receives provides for NAT, provide for NAT for source UDP Port number UDP Port number, and since the IP address in the received signaling message content of RNC be: Node B private IP address, UDP Port number is UDP Port number of Node B, and because not the coinciding property of public network IP address and private IP address, because the characteristic that does not coincide of public network address and privately owned address, as seen RNC is according to the signaling message content, to all can't discern for the right user packet that all Node B send, and it is abandoned.

Therefore, by as can be seen above, for the situation of using the IP transmission network as the Iub interface carrying, if when Node B uses private IP address, use the communications protocol of existing WCDMA, will cause causing can not normal communication between Node B and the RNC.

Summary of the invention

The technical problem to be solved in the present invention provides method for interface communication between a kind of radio network controller and the base station, to be implemented under the IP transmission means, Iub interface is supported nat feature, uses in the base station under the situation of private IP address, realizes the normal communication between Node B and the RNC.

For solving the problems of the technologies described above, the objective of the invention is to be achieved through the following technical solutions:

Method for interface communication between a kind of radio network controller and the base station, the interface between wherein said radio network controller and the base station use the IP transmission network as carrying, may further comprise the steps:

The IP address that the IP address of A, radio network controller to obtain base station, User Datagram Protocol port numbers provide with network address translater respectively, the mapping relations of User Datagram Protocol port numbers;

B, radio network controller are according to described mapping relations, with base station communication.

Method of the present invention, obtaining of the mapping relations of the IP address of the base station described in the described steps A and the IP address that network address translater provides specifically may further comprise the steps:

Arbitrary User Datagram Protocol port of A1, base station sends message to radio network controller, the message content of wherein said message comprises the IP address of described base station, after change by network address translation IP address in the message header of described message, arrive radio network controller, radio network controller is according to the message content and the message header of described message, obtains the mapping relations of the IP address that IP address, described base station and network address translater provide.

Method of the present invention, obtaining of the mapping relations of the User Datagram Protocol port numbers that the User Datagram Protocol port numbers of described steps A base station and network address translater provide specifically may further comprise the steps:

The User Datagram Protocol port of A2, base station periodically sends message to radio network controller, the message content of wherein said message comprises the User Datagram Protocol port numbers of base station, after the message header of described message is changed through network address translation, arrive radio network controller, radio network controller obtains the mapping relations of the User Datagram Protocol port numbers of base station and the User Datagram Protocol port numbers that network address translater provides according to the message content and the message header of described message.

Method of the present invention, the message content of message further comprises the Base Station Identification of described base station described in the steps A 1, and radio network controller obtains the corresponding relation of the IP address of described Base Station Identification and described base station further according to described message content.

Method of the present invention, described steps A specifically may further comprise the steps:

A3, the User Datagram Protocol port of base station periodically sends message to radio network controller, the message content of described message comprises the Base Station Identification of described base station, the IP address of base station, and the User Datagram Protocol port numbers of described base station, the message header of described message is through after the network address translation, arrive radio network controller, radio network controller is according to described message content, message header, obtain the IP address of base station and the IP address that network address translater provides, and the User Datagram Protocol port numbers of base station and network address translater provide the mapping relations of User Datagram Protocol port numbers.

Method of the present invention, described Base Station Identification are number of base stations or base station title.

Method of the present invention in described steps A 2 or A3, further may further comprise the steps:

If the A4 base station has increased new User Datagram Protocol port numbers, then described new User Datagram Protocol port is first to described radio network controller, send at least one described message, radio network controller obtains the new User Datagram Protocol port numbers of described base station and the mapping relations of the User Datagram Protocol port numbers that network address translater provides according to described message content and message header.

When if the A5 base station need discharge existing User Datagram Protocol port numbers, then stop to send described message, radio network controller keeps the mapping relations of the User Datagram Protocol port numbers of described base station and the User Datagram Protocol port numbers that network address translater provides.

When if the described base station of A6 User Datagram Protocol port is taken by business, stop to send described message, radio network controller keeps the mapping relations of the User Datagram Protocol port numbers of described base station and the User Datagram Protocol port numbers that network address translater provides.

Method of the present invention, described step B specifically may further comprise the steps:

When B1, radio network controller receive the signaling message that is sent by the base station, according to described mapping relations, with IP address, base station, the User Datagram Protocol port numbers in the described signaling message content, convert IP address and User Datagram Protocol port numbers that network address translater provides to;

When B2, radio network controller send packet to the base station, IP address, User Datagram Protocol port numbers with the purpose base station, after extending this as IP address that described network address translater provides, User Datagram Protocol port numbers respectively, described packet is sent to described purpose base station.

As can be seen from the above technical solutions, the present invention has following advantage:

Because the mapping relations of the IP address that the present invention has set up Node B at RNC IP address, Port number and NAT provide, Port number, when if the IP address that Node B gets access to is private IP address, RNC can be according to these mapping relations, with this private IP address and convert the IP address of the public network that corresponding NAT provides and UDP Port number for UDP Port number to, solved the signaling configuration parameter of RNC, can not correctly discern the response message that receives and the problem of packet according to the signaling message content; Realized using the IP transmission network can support the function of NAT to realize the normal data transfer between Node B and the RNC as the Iub interface of carrying.

Further, IP address at the Node B that obtains, the IP address that provides with NAT for UDP Port number, during UDP Port number mapping relations, obtain the IP address at Node B to the RNC that is used for that RNC sends, further comprise this Node B sign in the message of UDP Port number mapping relations, make the IP address of each NodeB corresponding with the sign of this Node B respectively, make the IP that RNC obtained, in the UDP Port mapping relations, the sign that also comprises every Node B, make the IP address of each Node B corresponding one by one with each Node B sign, this will help the administrative mechanism of RNC execution to Node B more.

Further, if in the same wireless access network, the Node B that is connected with unified RNC, both there had been the Node B that uses public network IP address, had the Node B that uses private IP address again, in this kind mixed networking, use method of the present invention, if RNC is used identical management, in RNC, all Node B are used method of the present invention, obtain the mapping relations of IP address, UDP Port number.Conspicuous, for the Node B that uses public network IP address, because the message between Node B and the RNC, need not the process network address translation and directly communication, therefore, for the Node B that uses public network IP address, in mapping relations, the IP address of Node B, UDP Port number respectively provide IP address, UDP Port number identical with described NAT, and the mechanism that RNC carries out communication according to these mapping relations does not influence communication; And,, can carry out normal communication according to these mapping relations owing to set up mapping relations to using the Node B of private IP address.In addition,, also can in RNC, only use the inventive method, set up the mapping relations table, and carry out communication according to the mapping relations table to the Node B that uses private IP address for above-mentioned mixed networking; And, need not to set up IP address, UDP Port mapping relations to using the Node B of public network IP address, and directly communication.Therefore the inventive method both had been applicable to the single network of the NodeB that can only use private IP address, was applicable to the Node B that uses public network IP address too, and the hybrid network of using the Node B of private IP address.

In addition, the inventive method need not change to the hardware of existing communication network, only need send the message that is used to set up IP mapping relations, Port mapping relations at Node B, and RNC preserves its mapping relations at the RNC end and gets final product according to connecing this message.Therefore, the inventive method is implemented simple, convenient.

Description of drawings

Fig. 1 is a WCDMA system configuration schematic diagram;

Fig. 2 is the system configuration schematic diagram of IP transmission network as the Iub interface carrying;

Fig. 3 is the method flow schematic diagram of embodiment 1;

Fig. 4 is the IP address transition schematic diagram of the message that NAT sends the Node B that uses private IP address in the IP transmission network;

Fig. 5 is the IP address mapping table structural representation of preserving among the RNC;

Fig. 6 is IP address, the UDP Port mapping table structural representation of preserving among the RNC;

Fig. 7 is the method flow diagram of embodiment 2.

Embodiment

Core concept of the present invention is, use the Iub interface of IP transmission network for containing, if Node B uses private IP address, so as carrying, by at RNC end, the mapping relations of the public network IP address that the IP address, UDP Port of setting up Node B provides with NAT number respectively, UDP Port number.RNC carries out communication according to these mapping relations with the Node B that uses private IP address.

In order to allow those skilled in the art better understand content of the present invention, be further detailed below in conjunction with accompanying drawing and embodiment:

Fig. 1 is a WCDMA system configuration schematic diagram, and as shown, whole WCDMA system is made up of three parts, be core network subsystem (Core Network, abbreviation CN), RNS (RadioNetwork System is called for short RNS) and subscriber equipment (User Equipment is called for short UE).The exchange and the route of audio call and external network in the core net processing WCDMA system.RNS comprises RNC and two entities of Node B again, and RNC links to each other with core net by the Iu interface, mainly is responsible for establishment of connection and release, switching, and grand diversity merges, the resource management controlled function of wireless network; NodeB is the base station of WCDMA system, links to each other with RNC by Iub interface, and be the interface equipment of user and system, controlled by RNC.In system of the present invention, Iub interface is carried by the IP transmission network.UE is a subscriber terminal equipment, is undertaken providing the miscellaneous service function of circuit domain and packet domain for the user alternately by the Uu interface (wave point) and the network equipment.

Figure 2 shows that Node B shown in Figure 1 and the Iub interface between the RNC use XDSL (x DigitalSubscriber Line, be called for short XDSL, be a kind of IP transmission network of using always) be the system configuration schematic diagram of Iub interface carrying, show as Fig. 2, base station (Node B) is passed through by Digital Subscriber Line (Digital SubscriberLine, be called for short DSL), Digital Subscriber Line Access Multiplexer (Digital Subscriber Line AccessMultiplexer, be called for short DSLAM), and BAS Broadband Access Server (Broadband Access Server, abbreviation BAS) the IP transmission network of forming carries out communication as the Iub interface between Node B and the RNC with radio network controller.

According to different IP transmission networks narrate agreement and whether Node B can obtain public network IP address, exist Node B can only obtain privately owned IP address, such as, if the operator has sufficient public network IP address resources, and be willing to mean Node B and distribute public network IP address, then the IP address of Node B acquisition is a public network address, therefore, Node B need not can directly arrive RNC through network address translation (nat) to the signaling message or the packet of RNC transmission in this case; Otherwise then Node B can only obtain private IP address, signaling message or packet that this Node B sends to RNC, in the IP transmission network, must be through network address translation (nat), the private IP address in the message header is converted to public network address after, could arrive RNC.

What deserves to be explained is, the present invention is in embodiment, is that example describes with the XDSL network as the IP transmission network, but the scope of application of the present invention is not limited in the XDSL network, and is applicable to the WCDMA system of all use IP transmission networks for the Iub interface of carrying.

Below specify in using the WCDMA system of IP transmission as the Iub interface of carrying, how to use the inventive method, the realization Iub interface is supported NAT, and realizes Node B and RNC normal communication.

Embodiment 1:

Fig. 3 is a present embodiment method flow schematic diagram, and as shown, this method may further comprise the steps:

Step S301: obtain the IP address mapping relation.

After Node B starts successfully, send a message that includes this Node B private IP address, this Node B sign in message content to RNC, this Node B sign can be that Node B ID or Node B Name etc. can show the sign which Node B this Node B specifically is.

As shown in Figure 4, after this message is sent from Node B, arrive RNC through NAT.In the time of this message process NAT, IP source address is modified the public network IP address that provides for NAT from private IP address in the message header.RNC receives after this message, according to the IP source address in the message header (public network IP address that NAT provides), and the private IP address in the message content, Node sign, obtain IP mapping relations table as shown in Figure 5.

When RNC receives that source address is the packet of this public network IP address, according to these IP mapping relations, find and the corresponding private IP address of this public network IP address, Node B sign just knows this packet is from which Node B.

Step S302: obtain UDP Port mapping relations.

The communication of Node B and RNC specifically is the communication of Node UDP Port and RNC UDP Port.Each Node B is at a UDP Port of local maintenance resource pool, and this resource pool comprises several UDP Port, such as can being 20, and towards all Node B, RNC uses same definite UDP Port, and therefore, the target UDP Port of all Node B correspondences is identical.

As network control port (Network Control Port, be called for short NCP) and Communication Control port (Communication Control Port, abbreviation CCP) after setting up successfully, Node B uses the UDP Port in the resource pool periodically to be sent in UDP Port number the message that comprises Node B in the message content to RNC (specifically being RNC UDP Port), discern this message for the ease of RNC, the length of this message content, form is fixed.

When all message are passed through NAT for the first time, NAT is UDP Port of this information distribution, and in the change message header private IP address of source Node B and UDP Port number, the private IP address of Node B is changed to the public network IP address that NAT provides, change to UDP Port number that NAT provides for UDP Port number with Node B, and in nat translation table the corresponding relation of record: (Node B private IP address, Node B distributes UDP Port, RNC IP address, RNC UDP Port)--(NAT public network IP address, NAT distributes UDP Port, RNC IP address, RNC UDP Port).Because in NAT, what use is the mechanism of public network IP address, UDP Port dynamic assignment, if in a time period of setting, NAT does not receive Node B private IP address, Node B distributes UDP Port, and RNC IP address is when RNC UDP Port distinguishes identical message, NAT will discharge the former UDP Port that distributes to this Node B Port, deletion corresponding N AT conversion corresponding relation.And, the former UDP Port that distributes to this Node B Port can be redistributed message to other links according to service needed.Therefore, in order to keep the conversion corresponding relation among the NAT, this Node B UDP Port must periodically send this identical message.In the transmission cycle of this message, specifically be provided with according to actual NAT in the IP transmission network of reality.Such as, in the IP transmission network, if set NAT in 1 minute, do not receive the data that the corresponding relation in the nat translation table is consistent once more, then do not keep the corresponding relation in this nat translation table, so, the cycle that Node B is sent this message got final product less than 1 minute.In order to reduce the burden of this message sink end RNC, generally can keep on the basis of nat translation table in assurance, what will be provided with in the cycle is bigger as far as possible.

This message is for the second time and when passing through NAT later on, and NAT is according to the relation record in the conversion table, and the change message header is transmitted to RNC.

After RNC receives this message, read source UDP Port number in the message header: UDP Port number of the Node B in the UDPPort that NAT provides number and the message content, the mapping relations of obtain Node B UDP Port number and NATUDP Port number.RNC whenever receives once, and mapping relations are once upgraded.The mapping relations of Node B Port and NAT Port in RNC, have just been formed like this.

Node B safeguards local resource pool, and Port more in resource pool is used, and during the Port a resource shrinkage, Node B need increase in this resource pool new UDP Port number.When Node B decision increases new UDP Port in resource pool, use this UDP Port that increases newly to be sent in and comprise this UDP Port that increases newly number message in the message content to RNC, message in order to ensure this transmission is received by RNC, can be when sending for the first time, send a plurality of described message continuously, then, according to the transmission cycle that configures, periodically send described message, to safeguard the conversion table among the NAT.

When business is released, when UDP Port resource increases, Node B need delete UDP Port number an of part from UDP Port resource pool, then directly making the UDP Port of this UDP Port correspondence that is stopped stop to send message gets final product, after this UDP Port stops to send, NAT is because within a certain period of time, do not receive the message of the transmission of this UDP Port, then in nat translation table, automatically delete the corresponding relation of this UDP Port, again discharge the former NAT UDPPort that distributes to the UDP Port of this Node B of this NAT, when service needed, NAT can redistribute this d/d UDP Port the UDP Port to other Node, or the link of the message of other UDP Port transmissions of this Node B.And the RNC end can be deleted the UDP Port mapping relations that the NAT of the UDP Port correspondence of this deleted Node B distributes.When new information used the UDP Port of this NAT, RNC, covered former record and gets final product directly with new corresponding relation according to the message that receives.

When if the UDP Port of Node B is taken by business, this occupied UDP Port can stop to send described periodic message, because the business data packet between the UDP Port of the UDP Port of RNC and this Node B, perhaps FP synchronization frame can be kept the corresponding relation of the UDP Port of this Node B in the nat translation table.

Step S303:RNC carries out communication according to the mapping relations of IP address, UDP Port number with Node B.

The IP, the Port corresponding relation that obtain more than the RNC basis obtain as shown in Figure 6 IP address, UDPPort mapping table, and preserve this mapping table.As seen from the figure, each Node B has unique NodeB sign, and IP address, each Node B has a plurality of UDP Port, the public network IP address that IP address and the NAT of each Node B provide is corresponding, each UDP Port under each Node B number, each UDPPort that the public network IP address that corresponding with each NodeB respectively NAT provides, NAT provide number corresponding.When RNC receives user data package from the UDP Port of certain Node B, the public network IP address that provides according to the NAT in the user data package message header, UDP Port number, contrast mapping table shown in Figure 6, can know received user data package is specifically from which concrete Node B, the IP address of this Node B, and UDP Port number of Node B that sends this user data package.

Between RNC and the Node B, set up and configuration of user plane by the signaling message of Iub interface, the entrained IP address of setting up user's face and UDP Port number in the signaling message content below specify the process of Signalling exchange:

RNC sends demand signalling message to Node B, and the type of this demand signalling message according to concrete service needed, can be that common signal channel is set up request, and RL sets up request, RL reconfiguration request etc.This request message carries IP address, RNC UDPPort number of RNC of the user data package of the user's face that will set up, and the IP address of establishing this RNC is IP address 10, is for the UDP Port of this RNC number Port numbers 10.

After Node B receives this demand signalling message of RNC transmission, carry out corresponding Internet resources configuration according to request message, set up such as common signal channel, RL sets up, RL resets etc.Node B is to RNC transmission response signaling message, and this corresponding message can be that common signal channel is set up response according to the respective resources configuration operation that this Node B carries out accordingly, and it is ready that RL sets up and responds, RL resets etc.Can only obtain at Node B under the situation of private IP address, this response signaling message is carried is the private IP address of Node B of the user's face that will set up and UDP Port number, and the IP address, UDP Port of establishing this Node B number are respectively: IP address 1, Port numbers 2.

After signaling plane is finished alternately, begin to set up user's face and connect, after the successful connection of user's face was set up, RNC and Node B began to carry out according to the signaling content transmission of user data package.

If the employing existing technical scheme, obviously the IP address of the Node B that preserves among the RNC, UDPPort number are respectively: IP address 1, Port numbers 2, below analyze respectively at the difference of the transmission direction of user data package:

At first, issue the situation of user data package to Node B for the UDPPort of RNC, RNC is according to the signaling message of being preserved, source IP address in the message header of the user data package that issues and UDPPort are respectively the IP address (IP address 10) of RNC and UDP Port number (Port number 10), target ip address and UDP Port are respectively the IP address (IP address 1) of Node B and UDP Port number (Port number 2), and because the IP address of Node B is a private IP address, and the network at RNC place is for using the network of public network address, therefore this user data package of sending can't correctly arrive the Node B of institute's syllabus, as seen, RNC can not communication to Node B direction on user's face.

Secondly, send the situation of user data package to the UDP of RNC for the UDP of Node B, NodeB according to the signaling message of preserving in the message header of the user data package that RNC sends purpose IP address and be respectively for UDP number: the IP address of the RNC that carries in the signaling message content (IP address 10) and UDP Port number (Port number 10), be respectively the IP address (IP address 1) of this Node B that sends this packet for source IP address and UDP Port number and send (Port number 2) UDP Port number of UDP Port of user data package, when the user data package process of sending is the Iub interface of carrying with the IP transmission network, because the source IP address in the message header of this user data package is a private IP address, therefore the NAT needs will be to the source IP address in the message header of user data package, carry out the NAT conversion for source UDP Port number, with the source IP address in the data packet message head and UDP Port number, convert the IP address that NAT provides respectively to, the UDP Port that NAT provides number, could arrive the UDP Port of the purpose RNC of public network side.As seen the source IP address of the message header of the user data package that receives of RNC and the IP address (IP address 1) that no longer is Node B UDP Port number and UDP Port (Port number 2), but through the IP address that provides of NAT after the conversion and UDP Port number, because the characteristic that does not coincide of public network address and privately owned address, as seen RNC is according to the signaling message content, to all can't discern for the right user packet that all NodeB send, and it is abandoned, thereby Node B is to the data transmission exception of RNC direction.

Appearance for fear of above-mentioned situation, the present invention adopts following technical scheme, when RNC receives the response signaling message of NodeB transmission, according to mapping table shown in Figure 6, with UDP Port number of the private IP address of Node B in the signaling message content, Node B, convert public network IP address that NAT provides, UDP Port number respectively to.After this conversion, the IP address of the Node B of the signaling message content that is used for configuration of user plane of on RNC, preserving, be modified respectively for UDP Port number and be the public network IP address that NAT provides, the UDP Port that NAT provides number, if the IP address of the Node B that is used for configuration of user plane in the signaling message content is IP address 1, be for the UDP Port of this Node B number Port numbers 2, after RNC receives this signaling message, according to mapping table shown in Figure 6, with the IP address of the Node B in the signaling message content and UDP Port number, be revised as the public network IP address that NAT provides respectively: the UDP Port that IP address 1 ' and NAT provide number: Port number 2 ', thus RNC go up the signaling message of preserving Node B the IP address and be respectively for UDP Port number: IP address 1 ', Port number 2 '.

After user's face is set up successfully, send the situation of user data package to the UDP of RNC for the UDP of Node B, on this Node B of Node B UDP Port number is the UDP Port of Port numbers 2, according to sending user data package to RNC at the received signaling message of local terminal, when this user data package process is the Iub interface of carrying with the IP transmission network, because the source IP address of the message header of user data package is a private IP address, therefore NAT is according to the source IP in this user data package, source UDP Port purpose IP, purpose UDP Port obtains this source IP in nat translation table, the public network IP address that UDP Port number corresponding respectively NAT provides, UDP Port number, and with the source IP address (IP address 1) of this user data package message header, UDP Port number (Port number 2), change to the public network IP address that NAT provides (IP address 1 ') respectively, the UDP Port that NAT provides number (Port number 2 ').Therefore RNC receives that the source IP address of right user packet should be: IP address 1 ' is for source UDP Port number: Port number 2 '.When RNC receives the user data package of this source address, source UDP Port number, according to the signaling message of being preserved, the source of correct this user data package of identification, to make correct processing according to signaling, as seen be with after the technical scheme of the present invention, Node B is normal to the user data package transmission of RNC direction.

Issue the situation of user data package to Node B for the UDP Port of RNC, RNC sends user data package according to the signaling message of being preserved to Node B, with the purpose IP address of user data package, purpose UDP Port number, extend this as public network IP address (IP address 1 ') that NAT provides, UDP Port number (Port number 2 ') respectively.During this packet process NAT, NAT obtains the NAT transformational relation according to the source IP address in this user data package message header, source UDP Port number, purpose IP address, the purpose UPD Port number conversion table at NAT, with the purpose IP address in the user data package message header (IP address 1 '), purpose UDPPort number (Port number 2 '), be modified to respectively (Port number 2) private IP address (IP address 1), Node B UDP Port number of Node B, this user data package successfully sent to the UPD Port of the required NodeB that sends to.

Embodiment 2:

Different of present embodiment and embodiment 1 are, implementing to obtain IP mapping relations, UDP Port mapping relations respectively in 1, and in this enforcement, Node B not transmission information separately obtains the mapping relations of IP, but when obtaining UDP Port mapping relations, obtain the IP mapping relations.

Fig. 7 is the schematic flow sheet of this implementation method, and as shown, this method may further comprise the steps:

Step S701: the mapping relations of obtaining IP address, UDP Port number.

Step S302 basic and among the embodiment 1 is identical for this step.Different is, because a NodeB has several UDP Port, and being the IP address of this Node B for the IP address of all the UDP Port under this Node B, each the UDP Port under this Node B uses same IP address (the IP address of this Node B) and has mutually different UDP Port number.Therefore, the mapping relations of the IP address that the private IP address of NodeB and NAT provide in embodiment 1, specifically be after starting Node B and before this Node B and RNC set up communication, the arbitrary UDP Port that uses this Node B sends a message that comprises the private IP address that Node B is obtained separately to RNC, this message arrives RNC through behind the NAT, by RNC according to the source address of the message header of this message (by the IP address that provides by NAT after the NAT conversion), and the private IP address of this Node B in the message content, obtain the IP mapping relations.And UDP Port number mapping relations that provide for each the UDP Port under this Node B with NAT for each UDP Port number of all the UDP Port under this Node B, then obtain: after Node B successfully starts by following scheme, before the UDP Port that uses this Node B and RNC set up communication, need set up the UDP Port of Node B of communication to periodic UDP Port number the message that sends the UDP Port that comprises this NodeB of RNC with RNC, this message is for the first time through NAT the time, NAT is UDP Port of this distribution of messages, and change source IP address in the message header of this message, and source UDPPort number, source IP address in the message header (private IP address of Node B) and source UDP Port number (the UDP Port of Node B number) changes to UDP Port number for the UDP Port of this distribution of messages of IP address (public network IP address) that NAT provides and NAT, and in nat translation table, write down IP, UDP Port number conversion corresponding relation, after RNC receives this message for the first time, provide according to NAT in the message header UDP Port number, and the UDP Port of the Node B of this message of transmission in the message content number, obtain and UDP Port number mapping relations that NAT provides UDP Port number of Node B.And because NAT adopts the mechanism of dynamic assignment to IP address on this NAT and UDP, if NAT receives the message that the UDP Port of certain Node B sends for the first time, and for the UDP Port of Node B sets up corresponding relation in nat translation table after, if at certain time intervals, do not receive the message of the UDPPort transmission of this Node B, NAT will discharge the former UDP Port that distributes to the UDP Port of this Node B automatically so, when service needed, with soon it redistributes the UDP Port to other Node B, the perhaps UDP Port of other of this Node B, therefore, in order to keep the conversion table record among the NAT, the UDP Port of this Node B needs periodically to send message to RNC, if this transmission cycle should less than the NAT in this IP transmission network at certain time intervals in, do not receive identical source IP, source UDP Port and purpose IP, the message of purpose UDP Port then discharges former this source IP address of distributing to, distribute to the time interval of other service messages the IP address of source UDP Port and UDP Port number.And for the purpose of controlling conveniently, the message content of this transmission still comprises UDP Port number of this Node B, and RNC whenever receives once described message, all the UDP Port mapping relations of former preservation is upgraded once.Because the IP address that all the UDP Port under the same Node B all use this Node B, and the communication essence between Node B and the RNC is the communication of the UDP Port of the UDP Port of Node B and RNC, therefore when the message of periodic UDP Port number of sending that UDP Port number of being used to obtain this Node B and NAT provide, guaranteed in NAT keeping simultaneously to the IP address of distributing to this Node B.

In the present embodiment, the IP address and the mapping relations of the IP address that NAT provides for obtaining Node B sends one separately and comprises the IP address of this Node B and the message that Node B identifies no longer separately.But after Node B successfully starts, certain UDP Port of Node B need set up before the communication relation with RNC, the UDP Port that the needs of this Node B are set up the communication relation includes this Node B sign to periodic transmission of RNC, the IP address of Node B, and the UDP Port of this Node B number message, in like manner, when this message is passed through NAT for the first time, NAT is UDP Port of this distribution of messages, and change IP in this message header, UDP Port number, IP address with the Node B in the message header, and the UDP Port of NodeB number convert the IP address that NAT provides to, and UDP Port number, and in nat translation table, write down corresponding relation: (Node B private IP address, Node B distributes UDP Port, RNC IP address, RNC UDP Port)---(the IP address that NAT provides, the UDP Port that NAT provides, the RNCIP address, RNC UDP Port).When this message arrived RNC for the first time, the Node B sign in the IP address that RNC provides according to the NAT in this message header, UDP Port number and the message content, the IP address of Node B, UDP Port number were obtained mapping relations as shown in Figure 6.In order to keep (Node B private IP address in the nat translation table among the NAT, Node B distributes UDP Port, RNC IP address, RNCUDP Port)---(the IP address that NAT provides, the UDP Port that NAT provides, RNC IP address, RNC UDP Port) record, prevent that the UDP Port that NAT will distribute to this Node B from redistributing, the UDP Port of this Node B periodically sends message to RNC, when the UDP of this Node B Port when RNC message is passed through NAT for the first time, NAT changes the address of message header according to the nat translation table record, and be transmitted to RNC, RNC whenever receives once, all the mapping relations of former preservation is upgraded, and guarantees the up-to-date ageing of the mapping relations that write down.

The UDP Port a resource shrinkage of Node B in Node B, need to increase new UDP Port, when this UDP Port that increases newly need set up communication with RNC, before setting up communication, use this new UDP Port to send and comprise this Node B sign to RNC, the IP address of Node B, and this UDP Port number message, with embodiment 1 in like manner, when this message is passed through NAT for the first time, NAT distributes a UDPPort for it, be transmitted to RNC after changing IP address in the message header of its message and UDP Port number, after RNC receives this message, message header and message content according to message, get access to the IP of the UDP Port that increases newly of this Node B, the mapping relations of UDP Port, and in mapping table as shown in Figure 6, increase these new mapping relations.For being used to of guaranteeing that this UDP Port that increases newly sends makes RNC get access to the IP of this UDP and the message of UDP Port mapping relations can arrive RNC, can take following measure: when Node B increases a UDP Port newly, before this new UDP Port and RNC set up communication, this comprises this Node B sign at first to use new UDP Port to send at least one (such as being 5) to RNC continuously, the IP address of Node B, and the UDP Port of this new UDP Port number message, and then keep the predefined cycle of institute to send, to keep the nat translation table record among the NAT.

When business is released, the UDP Port resource of Node B increases, and when needing a part of UDP Port of deletion, Node B only needs directly to delete this UDP Port in the locality and gets final product.Obviously, UDP Port after deleted stops to comprise the IP address of this Node B and UDPPort number the message of this UDP Port to the RNC transmission, after crossing certain time interval so, NAT will discharge the former UDP Port that distributes to this deleted Node B UDP Port, and, again it is distributed to other business according to service needed.And can not do special processing at the deletion of this Node B UDP Por at the RNC end, the former UDP Port that distributes to the UDP Port of this deleted Node B is distributed to its UDP Port of Node B as NAT or other UDP Port of this Node B the time, RNC is when receiving the message of the IP address that comprises Node B in the information content, UDP Port so, according to the information header content and the message content of this message, the mapping relations of upgrading in the mapping table get final product.

When the UDP of Node B Port is taken by business, in order to reduce the burden of network, this UDP Port that is taken by business can stop to be sent in the Node B sign that comprises Node B in the information content, the IP address of Node B, UDP Port number message, because the link address information of the message header of the business data packet that the UDP of this Node B sends, be used to obtain the IP address with the UDP Port of this Node B to what RNC sent, UDP Port number mapping relations, the Node B sign that in the information content, comprises Node B, the IP address of Node B, the link address information of the message header of UDP Port number message is identical, is specially the source IP address (the IP address of Node B) in the message header, source UDP Port (the UDP Port of this Node B), purpose IP address (the IP address of RNC), purpose UDP Port (the UDP Port of RNC) is identical.So NAT according to this user data package, can keep the record in the nat translation table, and the former UDP Port that distributes to the UDP Port of this Node B can not distributed to other business.

Step S702:RNC carries out communication according to the mapping relations of IP address, UDP Port number with Node B.

Step S303 concrete and among the embodiment 1 is identical for this step.

By as can be seen above, adopt method of the present invention, solved when using the IP transmission network to carry as Iub interface, because present communications protocol is not supported NAT, and the RNC that produces can not correctly discern the response message and the packet that receive according to the signaling configuration parameter, and the problem that causes communication to be obstructed, guaranteed when using the IP transmission network to carry the normal communication between RNC and the Node B as Iub interface.

More than method for interface communication between a kind of radio network controller provided by the present invention and the base station is 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, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.

Claims

1, the method for interface communication between a kind of radio network controller and the base station, the interface between wherein said radio network controller and the base station use the IP transmission network as carrying, it is characterized in that, may further comprise the steps:

2, method for interface communication between radio network controller according to claim 1 and the base station, it is characterized in that, obtaining of the mapping relations of the IP address of the base station described in the described steps A and the IP address that network address translater provides specifically may further comprise the steps:

3, method for interface communication between radio network controller according to claim 2 and the base station, it is characterized in that, obtaining of the mapping relations of the User Datagram Protocol port numbers that the User Datagram Protocol port numbers of described steps A base station and network address translater provide specifically may further comprise the steps:

4, method for interface communication between radio network controller according to claim 2 and the base station, it is characterized in that, the message content of message further comprises the Base Station Identification of described base station described in the steps A 1, radio network controller obtains the corresponding relation of the IP address of described Base Station Identification and described base station further according to described message content.

5, method for interface communication between radio network controller according to claim 1 and the base station is characterized in that, described steps A specifically may further comprise the steps:

6, according to method for interface communication between claim 4 or 5 described radio network controllers and the base station, it is characterized in that described Base Station Identification is: number of base stations or base station title.

7, method for interface communication between radio network controller according to claim 3 and the base station is characterized in that, in described steps A 2, further may further comprise the steps:

8, method for interface communication between radio network controller according to claim 5 and the base station is characterized in that, in described steps A 3, further may further comprise the steps:

9, method for interface communication between radio network controller according to claim 3 and the base station is characterized in that, in described steps A 2, further may further comprise the steps:

10, method for interface communication between radio network controller according to claim 5 and the base station is characterized in that, in described steps A 3, further may further comprise the steps:

11, method for interface communication between radio network controller according to claim 3 and the base station is characterized in that, in described steps A 2, further may further comprise the steps:

12, method for interface communication between radio network controller according to claim 5 and the base station is characterized in that, in described steps A 3, further may further comprise the steps: