CN102546555B - User terminal is when plurality of access modes and the interoperability methods of external network and equipment - Google Patents
User terminal is when plurality of access modes and the interoperability methods of external network and equipment Download PDFInfo
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- CN102546555B CN102546555B CN201010607722.5A CN201010607722A CN102546555B CN 102546555 B CN102546555 B CN 102546555B CN 201010607722 A CN201010607722 A CN 201010607722A CN 102546555 B CN102546555 B CN 102546555B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/102—Gateways
- H04L65/1033—Signalling gateways
- H04L65/1036—Signalling gateways at the edge
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/04—Interfaces between hierarchically different network devices
- H04W92/14—Interfaces between hierarchically different network devices between access point controllers and backbone network device
Abstract
The invention discloses a kind of user terminal when plurality of access modes and the interoperability methods of external network, it is characterized in that, described method is applied to the network that identify label is separated with station location marker, the method comprises: access node sends to the data message carrying the identify label of source user of external network to Interworking gateway node transmission source user terminal, wherein, described access node with the addition of station location marker and the Interworking gateway address of node of described access node at this data message; Interworking gateway node receives described data message, peel off the station location marker of described access node and Interworking gateway address of node that described access node adds, record the mapping relations of the station location marker of the described access node of the described data message identify label corresponding with described user terminal; And Interworking gateway node externally network send described data message.The invention also discloses a kind of intercommunication gateway equipment.The present invention makes can normally realize based on the basic service of outer net.
Description
Technical field
The present invention relates to communication technical field, relate to a kind of user terminal when plurality of access modes and the interoperability methods of external network and equipment.
Background technology
Existing internet widely used transmission control protocol/Internet Protocol (TransmissionControlProtocol/InternetProtocol, TCP/IP) in, IP address has dual-use function, that is: both as the station location marker of communication terminal host network interface in network topology of network layer, again as the identify label of transport layer host network interface.The situation of host mobility is not considered at the beginning of TCP/IP design.But when host mobility is more and more general, the semanteme overload defect of IP address is day by day obvious.When the IP address of main frame changes, not only route will change, and the identify label of communication terminal main frame also changes, thus routing overhead can be caused more and more heavier, and the change of host identification can cause application and the interruption be connected.The object that identify label is separated with station location marker be in order to solve IP address in TCP/IP semanteme overload and routing overhead serious, and the problem such as fail safe, thus the dual-use function of IP address is separated, realize mobility, many locals property, the dynamic code reassignment in IP address, alleviate the support of the problems such as exchanging visit in routing overhead and Next Generation Internet between heterogeneous networks region.
For solving the problem, propose the network architecture that multiple identify label is separated with station location marker at present, comprise host identity protocol (HostIdentityProtocol, HIP), location identity separated protocol (LISP), all belong to identify label and locator separation network.
(application number is the Chinese patent application of CN200910174826.9 for identify label shown in Fig. 1 and locator separation network framework, the applying date is on October 17th, 2009), for convenience of description, hereafter by this User Identity and locator separation network referred to as SILSN (SubscriberIdentifier & LocatorSeparationNetwork); SILSN comprises access server (AccessServiceNode, ASN), subscriber equipment (UserEquipment, and identify label and location register register (Identification & LocaterRegister, ILR) etc. UE).Wherein ASN is used for access user equipment, is responsible for the access realizing subscriber equipment, and bears the function such as charging and switching, and ILR bears position registration and the identity recognition function of user.Wherein, ASN is logic entity, can be service universal packet wireless business business (GeneralPacketRadioService) support node (ServingGPRSSupportNode, SGSN), Gateway GPRS Support Node (GatewayGPRSSupportNode, GGSN), group data service node (PacketDataServingNode, and the equipment such as BAS Broadband Access Server (BroadbandRemoteAccessServer, BRAS) PDSN).Above-mentioned ILR can be key management system (KeyManagementSystem in embody rule scene, KMS), attaching position register (HomeLocationRegister, HLR), home subscriber server (HomeSubscriberServer, HSS), mandate/certification/accounting server (Authorization, Authentication, Accounting, AAA) and other bear the entity of end-to-end key management and negotiation functionality.
In SILSN, user is to access identifier (AccessIdentification, AID) (identity for identifying user) is identified, ASN is with Route Distinguisher (RouteIdentification, RID) identify (position for identifying user place), each user and ASN have oneself independently AID or RID.When the user of in SILSN is by user terminal (as UE1) access network, first register its position (namely register this UE1 be positioned at which ASN under) by ASN to ILR, the identify label AID that ILR preserves user and the corresponding relation of ASN Route Distinguisher RID accessed.ILR after UE registration, the AID setting up user and the corresponding relation of the RID of ASN accessed.If UE1 needs and UE2 communication afterwards, after UE1 sends data message, being inquired about the position of UE2 to ILR by ASN1, under namely which ASN UE2 is positioned at, is ASN9 in Fig. 1.Then data message is sent to corresponding ASN9 by ASN1, and the data message after process is sent to UE2 by ASN9 again.
Above-mentioned network well achieves the identify label of UE and being separated of station location marker, when subscriber equipment moves and roams, does not need to change identify label again, ensure that the continuity of business in moving process.Routing expansion and fail safe also significantly improve.
In initial SILSN, each subscriber equipment can only access network in one way, SILSN does not access for plurality of access modes simultaneously and designs, when user adopts plurality of access modes access network, a different AID can only be distributed for the various access waies of each terminal, just having there is the situation of the corresponding multiple identify label of a user in this, has run counter to the basic demand of User Identity uniqueness in SILSN.
In prior art, when user terminal adopts plurality of access modes access network, between original user terminal and external network easily there is confusion in the mode of data message transmission.
Technical problem to be solved by this invention is to provide a kind of user terminal when plurality of access modes and the interoperability methods of external network, be applied to the network that identify label is separated with station location marker, thus make the user adopting various ways access network in identity and station location marker separated network, can normally access other external networks.
In order to solve the problems of the technologies described above, the invention provides a kind of user terminal when plurality of access modes and the interoperability methods of external network, it is characterized in that, described method is applied to the network that identify label is separated with station location marker, and the method comprises:
Access node sends to the data message carrying the identify label of source user of external network to Interworking gateway node transmission source user terminal, wherein, described access node with the addition of station location marker and the Interworking gateway address of node of described access node at this data message;
Interworking gateway node receives described data message, peel off the station location marker of described access node and Interworking gateway address of node that described access node adds, record the mapping relations of the station location marker of the described access node of the described data message identify label corresponding with described user terminal; And
Interworking gateway node externally network sends described data message.
Further, after recording the mapping relations step of the station location marker of the described access node of the described data message identify label corresponding with described user terminal, described method also comprises:
The port numbers of source user terminal is mapped as the port numbers for external network by described Interworking gateway node, and by the port numbers of source user terminal be recorded in the mapping relations of identify label of the source user corresponding with this source user terminal for the port numbers of external network;
Interworking gateway node externally network sends in the step of described data message, and described data message is the data message after carrying out port mapping.
Further, the step that the port numbers of source user terminal is mapped as the port numbers of external network comprises by described Interworking gateway node:
Described Interworking gateway node checks whether that existence and the data message that this receives have the data message received of station location marker of the identify label of identical sources user, the port numbers of identical sources user terminal and different access node,
If existed, described Interworking gateway node judges whether to comprise in described mapping relations mapping relations corresponding to the port numbers of the identify label of this source user and source user terminal, if do not comprised, the port numbers of the source user terminal of the data message this received is mapped as the port numbers for external network; If comprised, then the port numbers of the source user terminal in notebook data message is mapped as the port numbers difference for outer net corresponding to the identify label of the user identical with described mapping relations for the port numbers of outer net;
If described Interworking gateway node is checked through there is not the data message received that the data message received from this has the station location marker that the identify label of identical sources user, the port numbers of identical sources user terminal and different access save, then do not perform the step port numbers of source user terminal being mapped as the port numbers for external network, direct execution Interworking gateway node externally network sends the step of described data message.
Further, the step that the port numbers of source user terminal is mapped as the port numbers of external network comprises by described Interworking gateway node:
Described Interworking gateway node by all have the identify label of same source user, the port numbers of same user terminal and different source user station location marker data message in the port numbers of source user terminal be mapped as the different port numbers for outer net successively.
Further, after Interworking gateway node receives the step of described data message, described method also comprises:
Described Interworking gateway node checks in described mapping relations the identify label of the source user in the datagram whether existing and receive with this, the port numbers of source user terminal and the station location marker of access node, if existed, then according to described mapping relations, described source user port numbers is mapped as the corresponding port numbers for outer net, execution Interworking gateway node externally network sends the step of described data message.
Further, described method also comprises:
Described Interworking gateway node receives the data message that external network sends; And
The station location marker of the object user that the identify label of the object user of the data message that described Interworking gateway node checks sends to described external network is corresponding, sends to the data message that described external network sends the access node that the station location marker of described object user is corresponding.
Further, described method also comprises, in the step of the station location marker of the object user that the identify label of the object user of the data message that described Interworking gateway node checks sends to described external network is corresponding,
Described Interworking gateway node is the station location marker searching object user corresponding to the identify label of the object user of the data message that described external network sends from the authentication node of the station location marker corresponding to the identify label storing described object user of described object user attaching; Or
Described Interworking gateway node is the station location marker of object user corresponding to the identify label of the object user searching the data message that described external network sends from described mapping relations.
Further, before the data message that described external network sends being sent to the step of the access node that the station location marker of described object user is corresponding, described method also comprises:
Described Interworking gateway node checks the mapping relations of the destination interface of the data message that the identify label of whether this Interworking gateway node being preserved described object user and described external network send, if existed, described Interworking gateway node carries out port mapping according to mapping relations.
Further, before the data message that described external network sends being sent to the step of the access node that the station location marker of described object user is corresponding, described method also comprises:
When described Interworking gateway node checks the mapping relations of this Interworking gateway node not preserving the identify label of object user in data message that described external network sends and the port numbers of object user terminal, described Interworking gateway node is by the identify label of described object user, the station location marker of the user found, the port numbers of object user terminal, and be saved in described mapping relations for the port numbers of outer net; The port numbers of wherein said object user terminal is identical with the port numbers for outer net.
Further, the step of access node corresponding to the station location marker of described object user is sent to by the data message that described external network sends to comprise:
Described Interworking gateway node increases destination address in data message, and this destination address is the station location marker finding object user, then the data message adding destination address is sent to corresponding access node.
Further, the network that described identify label is separated with station location marker is User Identity and locator separation network (SILSN); Described access node is access server (ASN), described authentication node is identify label and location register register (ILR), described identify label is access identifier (AID), and described station location marker is Route Distinguisher (RID).
In order to solve the problems of the technologies described above, present invention also offers a kind of intercommunication gateway equipment, it is characterized in that, be applied to the network that identify label is separated with station location marker, this intercommunication gateway equipment comprises:
Receiver module, the source user terminal sent for receiving access node sends to the data message carrying the identify label of source user of external network, wherein, described access node with the addition of the station location marker of described access node and the address of intercommunication gateway equipment at this data message;
Message processing module (MPM), peel off for the station location marker of described access node that described access node is added and Interworking gateway address of node, and identify label corresponding with described user terminal for the station location marker of the described access node of described data message is sent to memory module, the data message after process is sent to sending module;
Memory module, the mapping relations of the identify label that the station location marker for the described access node recording described data message is corresponding with described user terminal; And
Sending module, sends described data message for externally network.
Further, message processing module (MPM), also for the port numbers of source user terminal being mapped as the port numbers for external network, and send to memory module by the port numbers of source user terminal with for the port numbers of external network, the data message after port mapping is sent to described sending module;
Described memory module, also for by the port numbers of source user terminal be recorded in the mapping relations of identify label of the source user corresponding with this source user terminal for the port numbers of external network;
Described sending module is that externally network sends the data message after carrying out port mapping.
Further, described message processing module (MPM) is for as follows the port numbers of source user terminal being mapped as the port numbers for external network:
Described message processing module (MPM) checks whether that existence and the data message that this receives have the data message received of station location marker of the identify label of identical sources user, the port numbers of identical sources user terminal and different access node,
If existed, described message processing module (MPM) judges whether to comprise in described mapping relations mapping relations corresponding to the port numbers of the identify label of this source user and source user terminal, if do not comprised, the port numbers of the source user terminal of the data message this received is mapped as the port numbers for external network; If comprised, then the port numbers of the source user terminal in notebook data message is mapped as the port numbers difference for outer net corresponding to the identify label of the user identical with described mapping relations for the port numbers of outer net;
If described message processing module (MPM) is checked through there is not the data message received that the data message received from this has the station location marker that the identify label of identical sources user, the port numbers of identical sources user terminal and different access save, then send the data message without port mapping to described sending module.
Further, described message processing module (MPM) is for as follows the port numbers of source user terminal being mapped as the port numbers for external network:
Described message processing module (MPM) by all have the identify label of same source user, the port numbers of same user terminal and different source user station location marker data message in the port numbers of source user terminal be mapped as the different port numbers for outer net successively.
Further, described message processing module (MPM), also for after the described data message of reception, check in described mapping relations the identify label of the source user in the datagram whether existing and receive with this, the port numbers of source user terminal and the station location marker of access node, if existed, then according to described mapping relations, described source user port numbers is mapped as the corresponding port numbers for outer net.
Further, described receiver module, also for receiving the data message that external network sends; And
Described message processing module (MPM), also for the station location marker of object user corresponding to the identify label of the object user finding the data message that described external network sends, and sends to described sending module by the station location marker of described object user;
Described sending module, the data message also for being sent by described external network sends to the access node that the station location marker of described object user is corresponding.
Further, described message processing module (MPM), also for checking in described mapping relations the mapping relations of the destination interface of the data message that the identify label of whether preserving described object user and described external network send, if so, carry out port mapping according to mapping relations.
Further, described message processing module (MPM), time also for being checked through the mapping relations of this Interworking gateway node not preserving the identify label of object user in data message that described external network sends and the port numbers of object user terminal, by the identify label of described object user, the station location marker of the user found, the port numbers of object user terminal, and send to described memory module for the port numbers of outer net
Described memory module, also for the identify label by described object user, the station location marker of the user found, the port numbers of object user terminal, and be saved in described mapping relations for the port numbers of outer net; The port numbers of wherein said object user terminal is identical with the port numbers for outer net.
Further, described sending module is for as follows the data message that described external network sends being sent to the access node that the station location marker of described object user is corresponding:
In data message, increase destination address, this destination address is the station location marker finding object user, then the data message adding destination address is sent to corresponding access node.
Adopt technical scheme of the present invention, when user adopts plurality of access modes to access, use same AID can access external network smoothly, the basic service based on outer net can normally be realized.Further, no matter user, from the access of how many kinds of access way, at outer net, remains same IP address designation, is convenient to monitor and trace to the source, improves security of system.
Summary of the invention
Accompanying drawing explanation
Fig. 1 is the schematic diagram of SILSN framework;
Fig. 2 is the method Problems existing schematic diagram of the intercommunication of user terminal and external network when adopting access way;
Fig. 3 is the schematic diagram of the encapsulation format of the data message of ASN to ISN in the embodiment of the present invention;
Fig. 4 schematic diagram that to be different ASN may repeat to the data message port numbers of ISN;
The schematic diagram of the port mapping of ISN when Fig. 5 is the transmission of one embodiment of the invention forward;
The schematic diagram of the port mapping of ISN when Fig. 6 is reverse transfer of the present invention;
When Fig. 7 is the transmission of another embodiment of the present invention forward, ISN carries out the schematic diagram of port mapping to all data messages;
Fig. 8 be in application example of the present invention ISN to the flow chart of the process of the data message that ASN sends;
Fig. 9 be in application example of the present invention ISN to the flow chart of the process of the data message that outer net is sent;
Figure 10 is the structural representation of intercommunication gateway equipment in the embodiment of the present invention.
Embodiment
In the network that identify label is separated with station location marker, each user has two identifiers, AID and RID, wherein the identity of AID representative of consumer, the position of RID representative of consumer.When user adopts plurality of access modes access network, in order to the uniqueness of user identity AID will be kept, AID must remain unchanged, a kind of user terminal that realizes in the network that identify label is separated with station location marker is comprised by the technical scheme of plurality of access modes access network: when user terminal uses different access way access network, must register at different access nodes, more precisely, be exactly same user when adopting the access of different access way, the access node accessed must possess different RID, the necessary difference of RID that various access way is corresponding.On the basis of this technical scheme, corresponding also proposition: when user registers, access node is to the access way should carrying user during the positional information of authentication node report of user terminal simultaneously, as WLAN (wireless local area network) (WirelessLocalAreaNetwork, and Wideband Code Division Multiple Access (WCDMA) (WideCodeDivisionMultiplexingAccess WLAN), WCDMA) etc., when such user adopts plurality of access modes access network at the same time, the positional information of each access way that access node reports to authentication node would not cover mutually, for user adopts various ways access network to create primary condition.
When the user in SILSN needs to communicate with external network (abbreviation outer net), need through Interworking gateway (InterconnectServiceNode, ISN) and outbound communication.Because user is when adopting various ways access network, plurality of access modes uses same AID.Therefore, when transmitting and receive data message, the data message of different access way all sends with identical AID, and these data messages are easy to be confused together at ASN, adopts original method to go wrong.
In original method, when user terminal and outer net communication, if ASN finds that data message is when mailing to outer net, the data message with regard to no longer sending user terminal encapsulates and is forwarded directly to ISN.After ISN receives data message, directly this data message is sent to outer net.This is a kind of fast efficient implementation method when single access way.But in plurality of access modes situation, the data message of what user terminal sent have identical AID can be transmitted to ISN through multiple ASN, send (hereinafter referred to as forward transmission) by ISN is unified to outer net, and do not carry the RID of ASN in the data message that forwards to ISN of ASN.And under multi-access mode, AID may the RID of corresponding multiple ASN.So when external user terminal is replied to Home Network user terminal (hereafter becoming reverse transfer), ISN does not just know be transmitted to which ASN after receiving the data message of reply, if random forwarding, data message will be caused to send chaotic, business cannot normally be carried out.As shown in Figure 2, user terminal UE1 and UE2 using the identify label AID1 of same user respectively via ASN1, ASN2 and ASN3 with three kinds of access way access networks, the wherein corresponding ASN of a kind of access way.When three kinds of access waies simultaneously and outer net communication time, Interworking gateway ISN will receive same user respectively from the bottom of the data message of ASN1, ASN2 and ASN3, and when the original mode of use and outer net interconnecting, data message is directly sent to outer net by ISN.The data message that three kinds of access waies of UE1 and UE2 forward via ASN1 and ASN3 etc. is owing to employing the identify label of same user, therefore, show as same IP address (IP3) outside on the net to send, when such ISN receives the reverse data message that outer net replys to AID1 again, ISN does not just know to issue which ASN.
As can be seen from upper surface analysis, after user adopts plurality of access modes to access, originally SILSN be single access design with the method cisco unity malfunction of outer net interconnecting.In order to solve user when adopting plurality of access modes and the problem of outer net interconnecting, the original mechanism of the present invention to SILSN and outer net interconnecting is revised, to meet SILSN when plurality of access modes and the needs of other network interworkings, ensure that outer network service can normally carry out.
The invention provides a kind of user terminal when plurality of access modes and the interoperability methods of external network, the method is applied to the network that identify label is separated with station location marker, and the method comprises:
Access node sends to the data message carrying the identify label of source user of external network to Interworking gateway node transmission source user terminal, and wherein, access node with the addition of the station location marker of this access node and the address of Interworking gateway at this data message;
Interworking gateway node receives this data message, peels off the station location marker of access node and the address of Interworking gateway that access node adds, the mapping relations of the identify label that the station location marker of the access node in record data message is corresponding with described user terminal; And
Interworking gateway node externally network sends datagram.
Preferably, after the mapping relations step of the identify label that the station location marker of the access node of record data message is corresponding with user terminal, method also comprises:
The port numbers of source user terminal is mapped as the port numbers for external network by Interworking gateway node, and by the port numbers of source user terminal be recorded in the mapping relations of identify label of the source user corresponding with this source user terminal for the port numbers of external network;
Interworking gateway node externally network sends in the step of described data message, and described data message is the data message after carrying out port mapping.
Wherein, the step that the port numbers of source user terminal is mapped as the port numbers of external network comprises by Interworking gateway node:
Interworking gateway node checks whether that existence and the data message that this receives have the data message received of station location marker of the identify label of identical sources user, the port numbers of identical sources user terminal and different access node,
If existed, Interworking gateway node judges in the mapping relations that this Interworking gateway node is preserved, whether comprise the mapping relations that the port numbers of the identify label of this source user and source user terminal is corresponding, if do not comprised, the port numbers of the source user terminal of the data message this received is mapped as the port numbers for external network; If comprised, then the port numbers of the source user terminal in notebook data message is mapped as the port numbers difference for outer net corresponding to the identify label of the user identical with mapping relations for the port numbers of outer net;
If described Interworking gateway node is checked through there is not the data message received that the data message received from this has the station location marker that the identify label of identical sources user, the port numbers of identical sources user terminal and different access save, then do not perform the step port numbers of source user terminal being mapped as the port numbers for external network, directly perform the Interworking gateway node externally step that sends datagram of network.
Or,
The step that the port numbers of source user terminal is mapped as the port numbers of external network comprises by Interworking gateway node:
Interworking gateway node by all have the identify label of same source user, the port numbers of same user terminal and different source user station location marker data message in the port numbers of source user terminal be mapped as the different port numbers for outer net successively.
The method also comprises:
Interworking gateway node receives the data message that external network sends; And
The station location marker of the object user that the identify label of the object user of the data message that Interworking gateway node checks sends to external network is corresponding, the data message sent by external network sends to the access node that the station location marker of object user is corresponding.
The method also comprises, in the step of the station location marker of the object user that the identify label of the object user of the data message that described Interworking gateway node checks sends to described external network is corresponding,
Interworking gateway node is the station location marker searching object user corresponding to the identify label of the object user of the data message that external network sends from the authentication node of the station location marker corresponding to the identify label storing this object user of object user attaching; Or
Interworking gateway node is the station location marker searching object user corresponding to the identify label of the object user of the data message that external network sends from its mapping relations stored.
Wherein, before the data message sent by external network sends to the step of the access node that the station location marker of object user is corresponding, described method also comprises:
Interworking gateway node checks the mapping relations of the destination interface of the data message that the identify label of whether this Interworking gateway node being preserved object user and external network send, if existed, Interworking gateway node carries out port mapping according to port mapping relationship.
Before the data message that described external network sends being sent to the step of the access node that the station location marker of described object user is corresponding, the method also comprises:
When Interworking gateway node checks the mapping relations of this Interworking gateway node not preserving the identify label of object user in data message that external network sends and the port numbers of object user terminal, Interworking gateway node is by the identify label of described object user, the station location marker of the user found, the port numbers of object user terminal, and be saved in described mapping relations for the port numbers of outer net; Wherein the port numbers of object user terminal is identical with the port numbers for outer net.
The data message sent by external network sends to the step of access node corresponding to the station location marker of described object user to comprise:
Described Interworking gateway node increases destination address in data message, and this destination address is the station location marker finding object user, then the data message adding destination address is sent to corresponding access node.
Hereinafter will be described in detail to embodiments of the invention by reference to the accompanying drawings.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combination in any mutually.In addition, in embodiments of the invention, be described for SILSN, but the present invention is not limited to this, the network that other identify labels are separated with station location marker can be applied to equally.
In the interoperability methods of existing SILSN and outer net, the data message that user terminal in SILSN sends to outer net directly transfers to ISN to forward by ASN, ASN is when handing to ISN, do not carry out any encapsulation or replacement work, data message only has object IP address and source IP address, does not carry the positional information of ASN.Like this when ISN replies to data message (i.e. the reverse data message) of the user terminal of this SILSN in forwarding, data message cannot be understood and from which ASN send, so reverse data message also cannot normally be replied.
Distinguish the data message being sent to outer net in order to enable ISN and which ASN to be dealt into ISN via, the present invention have modified the data message treatment mechanism of ASN to outer net, namely when ASN sends to the data message of external network to ISN transmission user terminal, in the address of RID and ISN of this data message original IP heading (comprising UE mark and outer net address) front this ASN of interpolation.Therefore, in the present invention, ASN needs data message UE being mail to outer net to add that outer field data message encapsulates, the heading that namely increase by is new.Specifically, be exactly ASN whole data message (i.e. IP message) that UE is sent as the payload of a new data message, namely former IP message payload and former IP head (UE identifies (mark of this UE includes the port numbers of identify label AID and UE of user) and outer net address) is comprised, this data message payload increases new IP heading, and the source address of new IP heading, be set to the station location marker of the ASN that user terminal accesses, i.e. RID, the destination address of new data message is set to the address of ISN, and the form of this data message as shown in Figure 3.
Like this, when data message mails to ISN from ASN, ISN, after the new IP heading of stripping, just can tell this data message and from which ASN send, thus likely the data message that outer net returns is sent to suitable ASN.
Consider the message of the identical sources AID that different ASN is sent, likely come from different user terminals (namely different user terminals uses the identify label access network of same user), therefore its port numbers also may repeat.As shown in Figure 4, it is AID1 that UE1 and UE2 have issued source AID, and source port number is the data message of 5000.For this situation, although ISN have recorded the source RID of two data messages, but because IP address and port are all the same, after data message is sent to outer net by ISN, the destination address (i.e. AID1) of the data message of the reverse reverting received will be identical with destination interface, and such ISN still cannot be distributed to correct ASN the reverse data message of these identical address and same port.
For solving this special circumstances Problems existing, the mechanism of the present invention to ISN deal with data message has done further improvement, carries out port translation, comprising at ISN:
For the data message (user terminal namely in this SILSN is transmitted data on network message externally) of forward transmission, when ISN receives the data message from ASN mono-is new, first the data message of the identical sources AID that other ASN existing send is checked whether, if had, illustrate that this user have employed plurality of access modes access network, the source port carried in the data message of identical AID that now whether the source port checked in this new data message is sent with other ASN by ISN repeats, if repeated, it is then a different port by the port mapping of repetition, preserve port mapping relationship, then the data message after carrying out port mapping is sent.As shown in Figure 5, when ISN receives the data message sent from RID2 and RID5, be checked through the data message that RID1 sends identical sources AID1 and identical sources port 23, be source port 9001 by the port mapping of the repetition of RID2, be source port 9002 by the port mapping of the repetition of RID5, then send.
When ISN receives the data message that outer net sends, then according to existing mapping relations, port numbers is remapped.As shown in Figure 6, when ISN receives the data message of object AID1, destination interface 9001 respectively, during data message with object AID1, destination interface 9002, ISN is according to existing mapping relations, the destination interface 9001 of data message and destination interface 9002 are all revised as destination interface 23, then data message are sent.
Wherein, when port mapping, should avoid by well-known port that Internet Engineering Task group (InternetEngineeringTaskForce, IETF) is distributed.
In order to simplify processes, the source port in the data message that all ASN carrying the AID of same user also can send by ISN at the very start, carries out port mapping process all successively.As shown in Figure 7, ISN is for the data message initiatively sent from same AID, and all carry out unified port mapping, such as to AID1, will be positioned at RID1, source port is the message of 23, is converted to the message that port is 9000; To be positioned at RID9, source port is the message of 23, is converted to the message that port is 9001.Like this, even if the data message of the identical sources AID that sends of different ASN and source port, ISN and external network server can both correctly process, and are unlikely to cause data message chaotic.Meanwhile, because user still adopts the AID of oneself, trace to the source and the security functions such as Lawful Interception so do not affect.
For the data message that outer net is initiated, if ISN can not find corresponding relation in local source port mapping table, then do not carry out port translation, and after directly encapsulating, be sent to corresponding ASN.Although for being the data message that outer net is initiated, but the destination slogan that this data message carries also can find the destination slogan of this data message in local source port mapping table, then illustrate that this user uses this destination slogan outwards to net and sent data message, now, after directly the destination slogan in data message being mapped according to local source port mapping table, send datagram.Inquire about less than RID corresponding to the object AID of this data message if ISN is upper, need the RID of the ASN inquiring about user terminal access corresponding to this object AID to ILR.Now, if when inquiring the corresponding multiple RID of this AID to ILR, the user terminal that this data message sends to object AID corresponding by the default priority orders that can return according to ILR or ASN corresponding to random selecting RID.
The application example that ISN carries out port mapping is provided below in conjunction with accompanying drawing.ISN needs to process the data message of both direction, and first is the data message that Intranet is dealt into outer net, hereinafter referred to as forward data Message processing.Second is the data message that outer net is dealt into Intranet, hereinafter referred to as reverse data Message processing.
Application example one, forward data Message processing flow process
In this application example, ISN to the handling process of the forward data message that ASN sends as shown in Figure 7, comprising:
The step 801:ISN ASN received in SILSN sends the data message sending to outer net, flow process starts, wherein, a new IP head is encapsulated in the data message that this ASN sends, this new IP head comprises: the RID of ASN, the address of i.e. source RID, and ISN, and also carry active AID and source port number in this data message.
Step 802:ISN, to data message decapsulation, extracts the source RID in data message, and source AID and source port number;
Step 803:ISN is with the source AID carried in this data message and source port number for index, and in search local port mapping table, whether existing same map relation exists; If search for less than, perform step 804; If searched, perform step 805;
Step 804: if do not find the mapping relations of this source AID and source port number in local port mapping table, then source port number is mapped, and mapping relations are stored in local port mapping table, perform step 806.
Step 805: according to the port mapping relationship in local port mapping table, maps the source port of data message;
Step 806: the data message after port mapping is sent to outer net, and flow process terminates.
Application example two, reverse data Message processing flow process
During reverse data Message processing, due to the data message sent for outer net, ISN not necessarily preserves the positional information of object AID in this data message.If the positional information of ISN not this object AID, needs to ILR launch position query manipulation.In addition, for the data message of directly initiating from outer net, do not carry out port translation, identical with the port numbers after conversion before conversion in other words.This application is executed in example, and ISN to the flow process of the process of the data message that outer net is sent as shown in Figure 9, comprising:
Step 901:ISN receives the data message that outer net sends, and flow process starts.
Step 902:ISN checks in this ISN the positional information that whether there is AID (the object IP address namely in data message), namely with the corresponding relation of this data message object AID and RID; If existed, perform step 903, if there is no, perform step 910.
Step 903: if there is the positional information of this object AID, then check the object AID carried in notebook data message and destination interface further whether Already in local port mapping table, if there is no, forward step 904 to, if existed, forward step 920 to.
Step 904: be stored in local mapping table by the object AID carried in notebook data message and destination interface, is set to identical by the port numbers before conversion and after conversion.
After performing this step, if follow-up ISN receives the data message sending to this object AID, ISN directly can find RID corresponding to this object AID from local mapping table, thus without the need to inquiring about the positional information of this object AID from ILR.
Step 905:ISN is conventionally direct increases outer field IP heading on data message, and destination address is set to ASN address by this IP heading, and be then sent to corresponding ASN, flow process terminates.
Step 910: if do not preserve the corresponding relation of AID and RID in ISN, ISN is to ILR launch position query manipulation, and the RID that inquiry AID is corresponding, when after the corresponding relation receiving AID and RID that ILR returns, performs step 904.
Step 920: according to local port mapping table, after carrying out port mapping, destination address by data message is replaced into the port found in port mapping table, then increase the encapsulation of outer IP head on data message after, the destination address of outer IP head encapsulation is set to the RID of the ASN inquired, then be sent to corresponding A SN, flow process terminates.
The present embodiment additionally provides a kind of intercommunication gateway equipment, and as described in Figure 10, be applied to the network that identify label is separated with station location marker, this intercommunication gateway equipment comprises:
Receiver module, the source user terminal sent for receiving access node sends to the data message carrying the identify label of source user of external network, wherein, access node with the addition of the station location marker of this access node and the address of intercommunication gateway equipment at this data message;
Message processing module (MPM), peel off for the station location marker of access node that access node is added and Interworking gateway address of node, and identify label corresponding with described user terminal for the station location marker of the described access node of described data message is sent to memory module, the data message after process is sent to sending module;
Memory module, the mapping relations of the identify label that the station location marker for the described access node recording described data message is corresponding with described user terminal; And
Sending module, sends described data message for externally network.
Preferably, message processing module (MPM) is also for being mapped as the port numbers for external network by the port numbers of source user terminal, and send to memory module by the port numbers of source user terminal with for the port numbers of external network, the data message after port mapping is sent to sending module;
Memory module is also for by the port numbers of source user terminal be recorded in the mapping relations of identify label of the source user corresponding with this source user terminal for the port numbers of external network;
Sending module is that externally network sends the data message after carrying out port mapping.
Wherein, message processing module (MPM) is for as follows the port numbers of source user terminal being mapped as the port numbers for external network:
Message processing module (MPM) checks whether that existence and the data message that this receives have the data message received of station location marker of the identify label of identical sources user, the port numbers of identical sources user terminal and different access node,
If existed, message processing module (MPM) judges whether to comprise in mapping relations mapping relations corresponding to the port numbers of the identify label of this source user and source user terminal, if do not comprised, the port numbers of the source user terminal of the data message this received is mapped as the port numbers for external network; If comprised, then the port numbers of the source user terminal in notebook data message is mapped as the port numbers difference for outer net corresponding to the identify label of the user identical with described mapping relations for the port numbers of outer net;
If message processing module (MPM) is checked through there is not the data message received that the data message received from this has the station location marker that the identify label of identical sources user, the port numbers of identical sources user terminal and different access save, then send the data message without port mapping to sending module.
Or
Message processing module (MPM) is for as follows the port numbers of source user terminal being mapped as the port numbers for external network:
Message processing module (MPM) by all have the identify label of same source user, the port numbers of same user terminal and different source user station location marker data message in the port numbers of source user terminal be mapped as the different port numbers for outer net successively.
Wherein, message processing module (MPM) is also for after the described data message of reception, the identify label of the source user in the datagram received with this, the port numbers of source user terminal and the station location marker of access node whether is there is in inspection mapping relations, if existed, then according to mapping relations, described source user port numbers is mapped as the corresponding port numbers for outer net.
Preferably, receiver module is also for receiving the data message that external network sends; And
The station location marker of object user also for the station location marker of object user corresponding to the identify label of the object user finding the data message that external network sends, and is sent to sending module by message processing module (MPM);
The data message of sending module also for being sent by external network sends to the access node that the station location marker of object user is corresponding.
Wherein, message processing module (MPM) also for checking the mapping relations of the destination interface of the data message that the identify label of whether preserving object user in described mapping relations and external network send, if so, carries out port mapping according to mapping relations.
Wherein, message processing module (MPM) is also for when being checked through the mapping relations of this Interworking gateway node not preserving the identify label of object user in data message that external network sends and the port numbers of object user terminal, by the identify label of object user, the station location marker of the user found, the port numbers of object user terminal, and send to memory module for the port numbers of outer net;
Memory module also for the identify label by object user, the station location marker of the user found, the port numbers of object user terminal, and be saved in described mapping relations for the port numbers of outer net; Wherein the port numbers of object user terminal is identical with the port numbers for outer net.
Wherein, sending module is for as follows the data message that described external network sends being sent to the access node that the station location marker of object user is corresponding:
In data message, increase destination address, this destination address is the station location marker finding object user, then the data message adding destination address is sent to corresponding access node.
The all or part of step that one of ordinary skill in the art will appreciate that in said method is carried out instruction related hardware by program and is completed, and described program can be stored in computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can use one or more integrated circuit to realize.Correspondingly, each module/unit in above-described embodiment can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range described in claim.
Claims (16)
1. user terminal is when plurality of access modes and an interoperability methods for external network, and it is characterized in that, described method is applied to the network that identify label is separated with station location marker, and the method comprises:
Access node sends to the data message carrying the identify label of source user of external network to Interworking gateway node transmission source user terminal, wherein, described access node with the addition of station location marker and the Interworking gateway address of node of described access node in this data message;
Interworking gateway node receives described data message, peel off the station location marker of described access node and Interworking gateway address of node that described access node adds, record the mapping relations of the identify label of the station location marker of the described access node of the described data message source user corresponding with described source user terminal; And
Interworking gateway node externally network sends described data message;
After recording the mapping relations step of the identify label of the station location marker of the described access node of the described data message source user corresponding with described source user terminal, described method also comprises:
The port numbers of source user terminal is mapped as the port numbers for external network by described Interworking gateway node, and by the port numbers of source user terminal be recorded in the mapping relations of identify label of the source user corresponding with this source user terminal for the port numbers of external network;
Interworking gateway node externally network sends in the step of described data message, and described data message is the data message after carrying out port mapping;
The step that the port numbers of source user terminal is mapped as the port numbers of external network comprises by described Interworking gateway node:
The port numbers of the source user terminal in the data message of the identify label that described Interworking gateway node has a same source user by all, the port numbers of same source user terminal and the station location marker of different source user is mapped as the different port numbers for external network successively; Or,
Described Interworking gateway node checks whether that existence and the data message that this receives have the data message received of station location marker of the identify label of identical sources user, the port numbers of identical sources user terminal and different access node, if existed, described Interworking gateway node judges whether to comprise in described mapping relations mapping relations corresponding to the port numbers of the identify label of this source user and source user terminal, if do not comprised, the port numbers of the source user terminal of the data message this received is mapped as the port numbers for external network; If comprised, then the port numbers of the source user terminal in notebook data message is mapped as the port numbers difference for external network corresponding to the identify label of the user identical with described mapping relations for the port numbers of external network.
2. the method for claim 1, is characterized in that,
If described Interworking gateway node is checked through there is not the data message received of station location marker that the data message received from this has the identify label of identical sources user, the port numbers of identical sources user terminal and different access node, then do not perform the step port numbers of source user terminal being mapped as the port numbers for external network, direct execution Interworking gateway node externally network sends the step of described data message.
3. the method for claim 1, is characterized in that, after Interworking gateway node receives the step of described data message, described method also comprises:
Described Interworking gateway node checks in described mapping relations the port numbers mapping relations identical with the station location marker of access node of the identify label of the source user in the data message whether existing and receive with this, source user terminal, if existed, then according to described mapping relations, the port numbers of described source user terminal is mapped as the corresponding port numbers for external network, execution Interworking gateway node externally network sends the step of described data message.
4. method as claimed in claim 1 or 2, it is characterized in that, described method also comprises:
Described Interworking gateway node receives the data message that external network sends; And
The station location marker of the object user that the identify label of the object user of the data message that described Interworking gateway node checks sends to described external network is corresponding, sends to the data message that described external network sends the access node that the station location marker of described object user is corresponding.
5. method as claimed in claim 4, it is characterized in that, described method also comprises, in the step of the station location marker of the object user that the identify label of the object user of the data message that described Interworking gateway node checks sends to described external network is corresponding,
Described Interworking gateway node is the station location marker searching object user corresponding to the identify label of the object user of the data message that described external network sends from the authentication node of the station location marker corresponding to the identify label storing described object user of described object user attaching; Or
Described Interworking gateway node is the station location marker of object user corresponding to the identify label of the object user searching the data message that described external network sends from described mapping relations.
6. method as claimed in claim 4, it is characterized in that, before the data message that described external network sends being sent to the step of the access node that the station location marker of described object user is corresponding, described method also comprises:
Described Interworking gateway node checks the mapping relations of the destination interface of the data message that the identify label of whether this Interworking gateway node being preserved described object user and described external network send, if existed, described Interworking gateway node carries out port mapping according to mapping relations.
7. the method as described in claim 5 or 6, is characterized in that, before the data message that described external network sends being sent to the step of the access node that the station location marker of described object user is corresponding, described method also comprises:
When described Interworking gateway node checks the mapping relations of this Interworking gateway node not preserving the identify label of object user in data message that described external network sends and the port numbers of object user terminal, described Interworking gateway node is by the identify label of described object user, the station location marker of the user found, the port numbers of object user terminal, and be saved in described mapping relations for the port numbers of external network; The port numbers of wherein said object user terminal is identical with the port numbers for external network.
8. method as claimed in claim 4, is characterized in that, sent to by the data message that described external network sends the step of access node corresponding to the station location marker of described object user to comprise:
Described Interworking gateway node increases destination address in data message, and this destination address is the station location marker finding object user, then the data message adding destination address is sent to corresponding access node.
9. method as claimed in claim 5, it is characterized in that, the network that described identify label is separated with station location marker is User Identity and locator separation network SILSN; Described access node is access server ASN, and described authentication node is identify label and location register register ILR, and described identify label is access identifier AID, and described station location marker is Route Distinguisher RID.
10. an intercommunication gateway equipment, is characterized in that, is applied to the network that identify label is separated with station location marker, and this intercommunication gateway equipment comprises:
Receiver module, the source user terminal sent for receiving access node sends to the data message carrying the identify label of source user of external network, wherein, described access node with the addition of the station location marker of described access node and the address of intercommunication gateway equipment in this data message;
Message processing module (MPM), peel off for the station location marker of described access node that described access node is added and Interworking gateway address of node, and identify label corresponding with described user terminal for the station location marker of the described access node of described data message is sent to memory module, the data message after process is sent to sending module;
Memory module, the mapping relations of the identify label that the station location marker for the described access node recording described data message is corresponding with described user terminal; And
Sending module, sends described data message for externally network;
Message processing module (MPM), also for the port numbers of source user terminal being mapped as the port numbers for external network, and send to memory module by the port numbers of source user terminal with for the port numbers of external network, the data message after port mapping is sent to described sending module;
Described memory module, also for by the port numbers of source user terminal be recorded in the mapping relations of identify label of the source user corresponding with this source user terminal for the port numbers of external network;
Described sending module is that externally network sends the data message after carrying out port mapping;
Described message processing module (MPM) is for as follows the port numbers of source user terminal being mapped as the port numbers for external network:
The port numbers of the source user terminal in the data message of the identify label that described message processing module (MPM) has a same source user by all, the port numbers of same source user terminal and the station location marker of different source user is mapped as the different port numbers for external network successively; Or,
Described message processing module (MPM) checks whether that existence and the data message that this receives have the data message received of station location marker of the identify label of identical sources user, the port numbers of identical sources user terminal and different access node, if existed, described message processing module (MPM) judges whether to comprise in described mapping relations mapping relations corresponding to the port numbers of the identify label of this source user and source user terminal, if do not comprised, the port numbers of the source user terminal of the data message this received is mapped as the port numbers for external network; If comprised, then the port numbers of the source user terminal in notebook data message is mapped as the port numbers difference for external network corresponding to the identify label of the user identical with described mapping relations for the port numbers of external network.
11. intercommunication gateway equipments as claimed in claim 10, is characterized in that,
If described message processing module (MPM) is checked through there is not the data message received of station location marker that the data message received from this has the identify label of identical sources user, the port numbers of identical sources user terminal and different access node, then send the data message without port mapping to described sending module.
12. intercommunication gateway equipments as claimed in claim 10, is characterized in that:
Described message processing module (MPM), also for after the described data message of reception, check in described mapping relations the port numbers mapping relations identical with the station location marker of access node of the identify label of the source user in the data message whether existing and receive with this, source user terminal, if existed, then according to described mapping relations, the port numbers of described source user terminal is mapped as the corresponding port numbers for outer net.
13. intercommunication gateway equipments as described in claim 10 or 11, is characterized in that:
Described receiver module, also for receiving the data message that external network sends; And
Described message processing module (MPM), also for the station location marker of object user corresponding to the identify label of the object user finding the data message that described external network sends, and sends to described sending module by the station location marker of described object user;
Described sending module, the data message also for being sent by described external network sends to the access node that the station location marker of described object user is corresponding.
14. intercommunication gateway equipments as claimed in claim 13, is characterized in that:
Described message processing module (MPM), also for checking in described mapping relations the mapping relations of the destination interface of the data message that the identify label of whether preserving described object user and described external network send, if so, carries out port mapping according to mapping relations.
15. intercommunication gateway equipments as claimed in claim 14, is characterized in that:
Described message processing module (MPM), time also for being checked through the mapping relations of this Interworking gateway node not preserving the identify label of object user in data message that described external network sends and the port numbers of object user terminal, by the identify label of described object user, the station location marker of the user found, the port numbers of object user terminal, and send to described memory module for the port numbers of external network;
Described memory module, also for the identify label by described object user, the station location marker of the user found, the port numbers of object user terminal, and be saved in described mapping relations for the port numbers of external network; The port numbers of wherein said object user terminal is identical with the port numbers for external network.
16. intercommunication gateway equipments as claimed in claim 13, is characterized in that:
Described sending module is for as follows the data message that described external network sends being sent to the access node that the station location marker of described object user is corresponding:
In data message, increase destination address, this destination address is the station location marker finding object user, then the data message adding destination address is sent to corresponding access node.
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| PCT/CN2011/084026 WO2012089027A1 (en) | 2010-12-27 | 2011-12-15 | Method and device for external network interworking for user terminals with multiple access methods |
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