CN100438489C

CN100438489C - Secondary activating data transmitting method and equipment thereof

Info

Publication number: CN100438489C
Application number: CNB2004100750926A
Authority: CN
Inventors: 魏中华; 高辉
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2004-08-27
Filing date: 2004-08-27
Publication date: 2008-11-26
Anticipated expiration: 2024-08-27
Also published as: CN1741494A

Abstract

The present invention relates to data retransmission technology in a radio communication system, particularly to a method and a device thereof for retransmitting secondary activation data. Thus, the processing burden of a CPU is decreased and matching efficiency and retransmission throughput are increased. The method for retransmitting secondary activation data is used for a GGSN and comprises the following procedures that one PDP context is selected in PDP contexts with the same PDP address as a main PDP context; when a down data message is retransmitted, the main PDP context is found according to a destination IP address of the down data message, and according to the down data message, a filter link of a packet package, which is led out by the main PDP context, is searched so as to obtain a packet package filter matched with the down data message. According to the matched packet package filter, the corresponding PDP context is found, and again according to a parameter, the down data message is encapsulated or is retransmitted after unpacked.

Description

Secondary activating data transmitting method and equipment thereof

Technical field

The present invention relates to the data forwarding technology in the wireless communication system, particularly the retransmission technique of secondary activating data in the gateway GPRS supporting node (GGSN).

Background technology

Along with mobile communication technology and internet (Internet Protocol, abbreviation " IP ") the continuous development of technology, mobile communication system has experienced global system for mobile communications (Global System for MobileCommunications, abbreviation " GSM "), GPRS (General Packet RadioService, be called for short " GPRS ") network, constantly develop to 3-G (Generation Three mobile communication system) at present.3-G (Generation Three mobile communication system) is a kind ofly can provide polytype and high-quality multimedia service for the user, compatible and can realize global seamless covering with fixed network, also allow the various small portable terminals system that communicates of random time at any time simultaneously.

Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division Multiple, abbreviation " WCDMA ") communication system is one of 3-G (Generation Three mobile communication system) of present main flow in the world, it is the new generation network that grows up on traditional GSM network, structure is similar to the GSM network configuration, mainly in network, added Gateway GPRS Support Node (Gateway GPRS Support Node, be called for short " GGSN "), Serving GPRS Support Node (Service GPRS Support Node, be called for short " SGSN "), and other various devices in the GSM network are upgraded, make network can handle Packet data service, thereby realize the interconnection and interflow of (Packet Data Network is called for short " PDN ") of WCDMA net and Packet Data Network.

GGSN and SGSN are the capital equipments of wcdma core network packet domain.GGSN is mainly used in provides route and the encapsulation of packet between WCDMA net and external data network, finishes functions such as access, forwarding and charging thus.When data insert the WCDMA network by PDN, packet data protocol (the Packet Data Protocol that GGSN will analyze through PDN, abbreviation " PDP ") context address is linked into the WCDMA network, search the routing iinformation of the WCDMA service-user that has activated simultaneously, according to this routing iinformation protocol Data Unit (Protocol Data Units is called for short " PDU ") is sent to SGSN by tunneling technique.When data sent to PDN by WCDMA, the data cell that comprises WCDMA service-user information that GGSN mainly sends over SGSN was encapsulated as and is fit to data structure that PDN transmits and with its transmission.Therefore, it seems that from extranets GGSN is the router of all User IPs the addressable WCDMA network.

SGSN is mainly used in to subscriber equipment (User Equipment is called for short " UE ") provides miscellaneous service, realizes functions such as Certificate Authority, travelling performance management and session management.Wherein session management is mainly realized by activation, modification, the deexcitation signaling process of PDP Context.Those of ordinary skill in the art should be understood that described PDP context activation flow process is mainly used in the transmitted in packets route of setting up user's face; Described PDP context modification flow process is used to revise the PDP Context service quality (Qualityof Service is called for short " Qos ") and the communication flows template (Traffic Flow Template is called for short " TFT ") of activation; Described PDP context deactivation flow process is used to remove the PDP Context of activation.If PDP Context is set up successfully, all can preserve PDP Context on SGSN, GGSN and the UE, only when PDP Context is in state of activation, just can carries out data between SGSN and GGSN and transmit.

Because in actual use, a UE can comprise one or more signatory pdp addresses, and each pdp address might comprise one or more sessions, and each session all has two states: state of activation and unactivated state.Wherein nonactivated session does not comprise routing iinformation, can not carry out data forwarding.Therefore to carry out SGSN and GGSN data and transmit, at first need to activate PDP Context.

PDP context activation comprises the PDP context activation of travelling carriage (Mobile Station is called for short " MS ") side initiation, PDP context activation and the secondary activating that network side is initiated.To introduce above-mentioned three kinds of active modes below respectively.

Fig. 1 transmits schematic diagram for the PDP context activation message that the MS side is initiated.As shown in the figure, mainly by MS 10, universal mobile telecommunications system (Universal Mobile Telecommunications System, abbreviation " UMTS ") land radio access web (UMTS Terrestrial Radio Access Network is called for short " UTRAN ") 11, SGSN 12 and GGSN 13 form.Wherein MS 10 is travelling carriage, can be mobile communication equipments such as mobile phone, wireless network card; UTRAN 11 is used to receive wireless data that MS 10 sends over or sends data to MS 10.

When activating, at first send to SGSN 12 and activate PDP Context request message 101, requesting activation PDP Context by MS 10.Those of ordinary skill in the art will be appreciated that, described activation PDP Context request message 101 should comprise network layer Service Access Point Indicator (the Network Layer Service Access Point Identifier that is used for mark P DU, abbreviation " NSAPI "), be used to distribute to identical PDP Context address and the APN PDP Context of activation parameter TI, PDP type, pdp address, APN and the Qos of (Access Point Name is called for short " APN ").Wherein said pdp address can be static address or dynamic address, when pdp address is dynamic address, need respective field be set to sky.

SGSN 12 tests to PDP type, pdp address, APN and PDP Context subscription data after receiving and activating PDP Context request message 101.Request message 101 is effective if checking shows the activation PDP Context, and GPRS Tunnel Protocol (the GPRS TunnellingProtocol that use this moment, abbreviation " GTP ") version number of passage is V1, then SGSN 12 distributes Tunnel End Point Identifier (Tunnel Endpoint Identifier is called for short " TEID ") to PDP Context; If it is effective to activate PDP Context request message 101, and the GTP passage version number that uses this moment is V0, and then SGSN12 distributes Tunnel Identifier (Tunnel Identifier, abbreviation " TID ") to PDP Context.After distributing the GTP tunnel sign, SGSN 12 selects APN according to certain algorithm, sends to GGSN 13 and creates PDP Context request message 102.Those of ordinary skill in the art should be understood that described establishment PDP Context request message 102 should comprise PDP type, pdp address, APN, NSAPI, TEID or information such as TID, preference pattern.

GGSN 13 receives the establishment PDP Context request message 102 that SGSN 12 sends over, for PDP Context distributes dynamic address, configuring charging sign, carries out the Qos negotiation.If can create PDP Context, then send and create PDP Context response message 103 to SGSN 12.

Behind the establishment PDP Context response message 103 that SGSN 12 receives from GGSN 13, judge.If allow to activate PDP Context, then send and allow to activate PDP Context message 104 to MS 10.Wherein, described permission activation PDP Context message comprises information such as PDP Context address, Qos.

Fig. 2 is that the PDP context activation message that network side is initiated is transmitted schematic diagram.As shown in the figure, mainly constitute by MS 20, SGSN 21, attaching position register (Home Location Register is called for short " HLR ") 22, GGSN 23.Wherein the effect of MS 10, the SGSN 12 among MS 20, SGSN21, GGSN23 and Fig. 1, GGSN 13 is identical, and HLR 22 is databases, is used for permanent storage leading subscriber and service log.

At first GGSN 13 receives the PDU from PDN, and sends " Send RouteingInformation for GPRS " message 201 to HLR 22.This message should comprise expression and wait to receive the MS IMSI International Mobile Subscriber Identity of data (International Mobile Subscriber Identity is called for short " IMSI "), the address of taking out SGSN 21 simultaneously.

HLR 22 receives after " Send Routeing Information for GPRS " message 201, if MS 10 can reach, then sends " Send Routeing Information for GPRSAck " message 202 to GGSN 23.Those of ordinary skill in the art should be understood that described " Send RouteingInformation for GPRS Ack ", and message 202 comprises the IMSI of MS 10, the information such as reason that the address of SGSN 21, travelling carriage can not arrive.

GGSN 23 receives message 202 backs and sends " PDU Notification Request " message 203 to SGSN21, and notice SGSN 21 has PDU to need to send.Those of ordinary skill in the art are through knowing that this message should comprise information such as IMSI, PDP type, pdp address and APN.

SGSN 21 handles after receiving " PDU Notification Request " message 203, and returns " PDU Notification Response " message 204 and give GGSN 23, and affirmation will ask MS10 to activate PDP Context.

SGSN 21 sends to MS 10 and activates PDP Context request message 205 then, requires MS 10 to initiate to activate the PDP Context request.From the above, described activation PDP Context request message 205 should comprise message such as TI, PDP type, pdp address, APN.After this will enter the pdp context activation of initiating by the MS side.

The handling process of secondary activating is similar to the PDP context activation handling process that the MS side is initiated, and could initiate when it only has PDP context activation on identical pdp address and APN.The PDP Context of secondary activating has only Qos different with the PDP Context that has activated, each PDP Context for identical pdp address all uses unique TI and NSAPI sign, each PDP Context only may be relevant with a TFT, and only allow a PDP Context not have relevant TFT.When carrying out the downlink data transmission, GGSN is according to the suitable PDP Context of TFT match selection; MS then selects different PDP Contexts according to Qos when transmitting upstream data.

Because when secondary activating transmitted downlink data, GGSN need select suitable PDP Context according to TFT, thereby distinguish the payload of different user, therefore be necessary to understand the structure and the course of work thereof of TFT.

TFT is actually by one to eight grouping IP filter and forms, and each filter discerns by unique grouping IP filter identifier.Each grouping IP filter also comprises a preferential index of assessment, is used to identify the TFT of each the PDP Context correspondence with identical pdp address.Those of ordinary skill in the art should be understood that the preferential index of above-mentioned assessment is one 0～255 a value, and the big more priority of numerical value is low more, and all are unique to the TFT of identical pdp address.Each grouping IP filter all has one or more in the attributes such as the will of failing to be sold at auction of communication class (Traffic class) among type of service/IPv6 among protocol number (Protocol Number) among source address and subnet mask, the IPv4 or the next header (Next header) among the IPv6, destination interface scope, destination port range, Internet Protocol Security (InternetProtocol Security is called for short " IPSec ") Security Parameter Index, the IPv4 and shielding, IPv6.The attribute that different grouping IP filters allows to coexist is not quite similar, and following table will be described the different grouping IP filter and allow the attribute that coexists, and " X " expression allows coexistence and has one at least.

When MS initiated the PDP context modification process, GGSN added TFT in the PDP Context that has activated to.If later PDP Context is made amendment, can also make amendment to TFT as required; If PDP Context is carried out deexcitation, then TFT is also deleted.Those of ordinary skill in the art should understand, and when PDP Context is made amendment, can revise or delete one or more already present grouping IP filters, also can create new grouping IP filter or deletion TFT.

Because corresponding pdp address of TFT, corresponding PDP Context of grouping IP filter among the TFT, all PDP Contexts that prior art will have same pdp address usually all are stored in the same array, are about to all grouping IP filters of TFT and all exist in the same array.When downlink data packet arrives GGSN, the central processing unit of GGSN inside (Central Processing Unit, be called for short " CPU ") according to the array of the corresponding pdp address of IP address search of downlink data packet, in the array of corresponding pdp address, successively the grouping IP filter attribute of each PDP Context and the information of downlink data packet are compared then, judge whether it mates.If coupling, then CPU transmits according to the parameter of this coupling PDP Context; If do not match, then continue to search.

In actual applications, there is following problem in such scheme: all be stored in the array because each group has the PDP Context of identical pdp address, then need a plurality of arrays for a plurality of pdp addresses, searching the PDP Context that is complementary with downlink data message can only handle by universal cpu, when matching efficiency is low, it is very low that the treatment effeciency of CPU just becomes, thereby can influence the throughput that secondary activating data is transmitted.

Cause the main cause of this situation to be, universal cpu need carry out the matching judgment processing of grouping IP filter among downlink data message and the TFT simultaneously and handle this two operations by the parameter realization data forwarding of coupling PDP Context, and the data forwarding throughput is subjected to the restriction of CPU treatment effeciency.When grouping IP filter matching efficiency was low, therefore CPU treatment effeciency step-down can influence the throughput that secondary activating data is transmitted.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of secondary activating data transmitting method and equipment thereof, makes the processing burden of CPU reduce, and matching efficiency and forwarding throughput improve.

For achieving the above object, the invention provides a kind of secondary activating data transmitting method, be used for gateway general grouping service wireless support node, comprise following steps:

In block data protocol context, select one as main block data protocol context with same packets data protocol address;

When carrying out the downlink data message forwarding:

The A network processing unit finds main block data protocol context according to the purpose internetworking protocol address of described downlink data message;

B searches the grouping IP filter chain that described main block data protocol context is drawn according to described downlink data message, obtains the grouping IP filter with described downlink data message coupling;

C finds corresponding block data protocol context according to the grouping IP filter of described coupling, and according to the block data protocol context parameter described downlink data message is encapsulated again or decapsulation after transmit.

Wherein, described main block data protocol context is identical with the packet data protocol address of the pairing block data protocol context of each node of its grouping IP filter chain of drawing.

Described block data protocol context all is stored in the one-dimensional linear table, and is call number of each block data protocol context layout.

Described method also comprises following steps, for described main block data protocol context is set up concordance list;

Described steps A also further comprises following substep:

Search the concordance list of described main block data protocol context according to the purpose internetworking protocol address of described downlink data message, find corresponding main block data protocol context call number;

In the described one-dimensional linear table of all block data protocol contexts of storage, find described main block data protocol context according to described main block data protocol context call number.

The concordance list of described main block data protocol context is according to binary tree form tissue.

In described step B, each the grouping IP filter in the described grouping IP filter chain all comprises the block data protocol context call number field corresponding with this grouping IP filter.

In described step B, the grouping IP filter in the described grouping IP filter chain is arranged in order according to priority order from high to low.

In described step B, the grouping IP filter at described grouping IP filter chain end is a sensing and the incoherent block data protocol context of this chain respective communication Traffic Profile, can handle according to the parameter of this block data protocol context when guaranteeing that described downlink data message can't mate.

The present invention also provides a kind of gateway general grouping service wireless support node apparatus, the support secondary activating data is transmitted, this gateway general grouping service wireless support node comprises the polylith service processing board, and described service processing board comprises central processing unit and network processing unit, wherein:

Described central processing unit is used for protocol processes and interface communication;

Described network processing unit is used to finish data message forwarding, and described data message forwarding comprises:

When carrying out the downlink data message forwarding:

By finding that relatively technical scheme difference with the prior art of the present invention is, the signaling in the GGSN service processing board is handled with data forwarding separated, signaling is handled by CPU, and data forwarding is handled by NP; The data structure that has also adopted simultaneously suitable NP to handle, all PDP Contexts are kept in the one-dimensional linear table, for the identical PDP Context of pdp address, ordering one of them is main PDP Context, the TFT of the corresponding PDP Context of this pdp address torn open be a plurality of filters, in filter, increase the index that a field is represented the PDP Context of the TFT correspondence under this filter.A plurality of filters according to priority are linked at after the main PDP Context from high to low successively, increase a kind of content and point to not related with TFT PDP Context for empty filter.Also be that main PDP Context is set up index, this index can use the form of binary tree to organize.

In secondary activating, correspond to the index of main PDP Context according to the purpose IP address lookup table of data message, look into main PDP Context table according to the index of main PDP Context, visit the filter chain of its back, the attribute that carries out filter carries out transmitting according to the parameter in the PDP Context of this filter correspondence after the match is successful.

Difference on this technical scheme, brought comparatively significantly beneficial effect, promptly carry out the data message processing by adopting special-purpose NP to replace universal cpu, and designed the data structure that suitable NP handles (comprise the one-dimensional linear table of all PDP Contexts of storage, according to the filter chain of priority arrangement, main PDP Context index etc.), the efficient of data message coupling PDP Context improves the throughput of the data forwarding when having increased secondary activating greatly when making secondary activating.

Description of drawings

Fig. 1 is that the PDP context activation message that the MS side is initiated is transmitted schematic diagram;

Fig. 2 is that the PDP context activation message that network side is initiated is transmitted schematic diagram;

Fig. 3 is a GGSN internal structure schematic diagram of realizing that according to an embodiment of the invention the GGSN secondary activating data is transmitted;

Fig. 4 is a service processing board structural representation of realizing that according to an embodiment of the invention the GGSN secondary activating data is transmitted;

Fig. 5 realizes non-secondary activating uplink data messages forwarding process chart according to an embodiment of the invention;

Fig. 6 realizes non-secondary activating downlink data message forwarding process chart according to an embodiment of the invention;

Fig. 7 is a main PDP Context index organization structural representation of realizing according to an embodiment of the invention that the GGSN secondary activating data transmits;

Fig. 8 realizes GGSN secondary activating downlink data message forwarding process chart according to an embodiment of the invention.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.

Main thought of the present invention is that signaling and data forwarding are separated, and signaling adopts universal cpu to handle, and The data network processing unit (Network Processor is called for short " NP ") is handled.In order to make NP higher than CPU to the treatment effeciency of data, the data structure and the handling process that have adopted suitable NP to handle, for example all PDP Context unifications are left in the one-dimensional linear table rather than the PDP Context of same pdp address is kept at an array separately, adopt the form of binary tree to organize context index or the like.

Fig. 3 is a GGSN internal structure schematic diagram of realizing that according to an embodiment of the invention the GGSN secondary activating data is transmitted.As shown in the figure, GGSN 30 mainly comprises master control borad 31,

service processing board

32,33 and

interface board

34,35.

Wherein, master control borad 31 is used for being responsible for route and collects and issue and carry out equipment control.

Service processing board

32,33 is used for being responsible for protocol processes and data forwarding.The main business of system all is to realize that on

service processing board

32,33 whole system can comprise a plurality of service processing boards, and each service processing board all comprises a CPU and NP.

Fig. 4 is a service processing board structural representation of realizing that according to an embodiment of the invention the GGSN secondary activating data is transmitted.As shown in the figure, each service processing board all is made up of CPU 41 and NP 42.Wherein CPU 41 is responsible for protocol processes and interface communication.NP 42 is used to receive the packet information that CPU 41 sends over, and message is carried out processing such as encapsulate forwarded or decapsulation forwarding according to the information of packet.Those of ordinary skill in the art should be understood that NP 42 is made up of some microprocessors and some hardware co-processor usually, adopt a plurality of microprocessors to carry out parallel processing, come the control and treatment flow process by software.Adopting hardware co-processor mainly is in order to improve the treatment effeciency of some complicated standard operation.Described complicated standard operation comprises congestion avoidance algorithm, flow scheduling algorithm of internal memory operation, routing table lookup algorithm, Qos etc.

Interface board

34,35 provides the interface that is connected with other equipment, thereby realizes abundant networking structure.Can be respectively applied for connection external data network and SGSN as

interface board

34,35.

When carrying out the downlink data forwarding, at first the routing table information of collecting is issued to

service processing board

32,33 and

interface board

34,35 respectively by master control borad 31.NP on service processing board 32 or the service processing board 33 handles the downlink data packet message that receives, obtain the grouping IP filter that is complementary with current downlink data package informatin and the corresponding PDP Context of IP filter that will divide into groups, according to downlink data message being carried out protocol conversion with this PDP Context parameter, again encapsulation or decapsulation, message sends by interface board 34 or interface board 35 the most at last.

In order more clearly to introduce the forwarding process of secondary activating uplink and downlink data message, at first introduce the forwarding process of non-secondary activating uplink and downlink data message below.

Fig. 5 realizes non-secondary activating uplink data messages forwarding process chart according to an embodiment of the invention, as shown in the figure.

When data forwarding, at first enter step 510, the NP in the service processing board searches the user index table according to TID in the user uplink data message or TEID, obtains user index number.Those of ordinary skill in the art should be understood that when adopting GTP passage version number to be V0 between GGSN and SGSN, use TID to search the user index table; When adopting GTP passage version number to be V1 between GGSN and SGSN, use TEID to search the user index table.

Then enter step 520, service processing board number finds user's forwarding-table item according to the user index that is obtained, obtain user profile, uplink message is encapsulated again or the decapsulation processing, make the message of encapsulation again or decapsulation in Packet Data Network, to transmit.

Enter step 530 at last, interface board will encapsulate again according to routing table or the uplink data messages of decapsulation sends, thereby finishes the process of transmitting of data from the mobile network to the Packet Data Network.

Fig. 6 realizes non-secondary activating downlink data message forwarding process chart according to an embodiment of the invention, as shown in the figure.

At first enter step 610, user's downlink data message is searched the downlink user concordance list on service processing board, obtains user index number and service processing board number.Those of ordinary skill in the art will be appreciated that, described downlink user concordance list can be with the plate number of managing business that comprises IP address, user, the inner cable quotation marks of PDP Context, and Virtual Private Network (Virtual Private Network, be called for short " VPN ") etc. field, and with VPN and IP address as critical field.

Then enter step 620, judge the service processing board that obtains whether be this plate.If then enter step 630, if not then entering step 640.

In step 630, service processing board number finds user's forwarding-table item by user index, takes out user profile, and message is carried out encapsulation process.

In step 640, GGSN carries out flap together with user index number and message and handles, and makes data message carry out encapsulation process on another service processing board.

Enter step 650 at last, GGSN sends from interface board according to the message that routing table will encapsulate again, realizes that the data from the Packet Data Network to the mobile network send.

During secondary activating, the forwarding process of uplink data messages is similar to non-secondary activating uplink data messages forwarding process, but the forwarding process of downlink data message and non-secondary activating downlink data message forwarding process are different.This mainly is because during secondary activating, same user has a plurality of different PDP Contexts, and the pdp address of these PDP Contexts is identical.When carrying out the uplink data messages forwarding, MS can select suitable PDP Context according to Qos, and this operation need not GGSN and handles, and is therefore similar with the forwarding process of non-secondary activating upstream data; When carrying out the downlink data forwarding, GGSN requires packet data package is changed according to certain specific PDP Context, therefore when carrying out the downlink data message forwarding, at first need the PDP Context of identical pdp address is selected, make downlink data message and selected PDP Context coupling, and then encapsulate again and transmit according to the PDP Context parameter of coupling.

Because in the prior art, the PDP Context that all pdp addresses are identical between GGSN all leaves in separately in the middle of the array, therefore has a lot of the arrays that vary in size.This data structure is not suitable for the inflexible NP of memory management, therefore can only be handled it by CPU, causes the message treatment effeciency low.Substitute CPU deal with data message by NP now, in order to make the treatment effeciency of NP be higher than CPU, need the storage organization of PDP Context be changed the data structure of using NP efficiently to handle, thereby improve the message matching efficiency, improve the throughput of data forwarding.

The present invention at first is stored in all users' of GGSN the PDP Context form with one-dimension array among the NP of service processing board, and is each PDP Context permutation index number.In all PDP Contexts of same user, select one then as main PDP Context, for the user that a PDP Context is only arranged then directly with this PDP Context as main PDP Context, with the call number of these main PDP Contexts according to certain data structure storage.In order to be fit to the NP management, usually these main PDP Context call numbers are stored with the structure of binary tree, because special optimization has been carried out in the processing to binary tree among the NP.

Fig. 7 is a main PDP Context index organization structural representation of realizing according to one embodiment of the invention that the GGSN secondary activating data transmits.As shown in the figure, mainly form by a main PDP Context call number storage list 70 with by the TFT grouping IP filter chain 71 that extracts in one of them main PDP Context with same pdp address, those of ordinary skill in the art can know, in actual use, TFT grouping IP filter chain 71 can have a plurality of.

Wherein, main PDP Context call number in the table 70 is the form storage according to binary tree, because the pdp address of each main PDP Context call number correspondence all is different, therefore can arrive corresponding pdp address according to the IP address search of downlink data message, thereby find out corresponding main PDP Context call number.

Because main PDP Context might not mate with described downlink data message, therefore for the pdp address that a plurality of PDP Contexts are arranged, also need to draw a TFT grouping IP filter chain 71 from main PDP Context, each the grouping IP filter in the chain all increases a field in order to show and the corresponding PDP Context call number of this grouping IP filter.In order to search conveniently, usually each is divided into groups IP filter according to priority sequence arrangement from high to low.System also can handle the downlink data message that can't mate in order to guarantee, adds an empty grouping IP filter usually at the end of chain, and this sky grouping IP filter points to the relevant PDP Context of a no TFT.Concerning empty packet filter, any data message can mate, and therefore can finally can match a default PDP Context so that can't mate the data message of other packet filters.

Because secondary activating only is the characteristic of the GTP passage V1 of version number, when being V0, then need not to add grouping IP filter chain in GTP passage version number.

Fig. 8 realizes GGSN secondary activating downlink data message forwarding process chart according to an embodiment of the invention, as shown in the figure.

At first enter step 810, at first search main PDP Context index stores table 70, obtain the main PDP Context call number corresponding with this data message according to the downlink message data message by the CPU of Business Processing piece.Those of ordinary skill in the art can know, can arrive the call number of main PDP Context according to the IP address search of message data.

Enter step 820 then, the Business Processing piece is sought the TFT grouping IP filter with described downlink data message coupling according to the grouping IP filter chain of the main PDP Context call number visit carry that finds in its back.Because the grouping IP filter chain of carry is that therefore the order of mating also is to carry out according to priority order from high to low according to from high to low tactic of PDP Context priority.If find the grouping IP filter that mates with this downlink data message, then enter step 830, still do not find the grouping IP filter that mates with this downlink data message if find grouping IP filter chain end, then enter step 840.

In step 830,, find corresponding PDP Context, thereby finish Data Format Transform according to the information of this PDP Context according to corresponding PDP Context call number field in the TFT grouping IP filter that obtain in the step 820 and the current data message coupling.

In step 840,, therefore can carry out format conversion according to the pairing PDP Context information of sky grouping IP filter of chain end definition owing to do not find the TFT grouping IP filter that mates with current data message.

Then enter step 850, interface board sends the data message of encapsulation again according to routing iinformation.

Though by reference some preferred embodiment of the present invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that, can do various changes to it in the form and details, and the spirit and scope of the present invention that do not depart from appended claims and limited.

Claims

1. a secondary activating data transmitting method is used for gateway general grouping service wireless support node, it is characterized in that, comprises following steps:

When carrying out the downlink data message forwarding:

2. secondary activating data transmitting method according to claim 1, it is characterized in that described main block data protocol context is identical with the packet data protocol address of the pairing block data protocol context of each node of its grouping IP filter chain of drawing.

3. secondary activating data transmitting method according to claim 2 is characterized in that, described block data protocol context all is stored in the one-dimensional linear table, and is call number of each block data protocol context layout.

4. secondary activating data transmitting method according to claim 3 is characterized in that described method also comprises following steps, for described main block data protocol context is set up concordance list;

Described steps A also further comprises following substep:

5. secondary activating data transmitting method according to claim 4 is characterized in that, the concordance list of described main block data protocol context is according to binary tree form tissue.

6. secondary activating data transmitting method according to claim 3, it is characterized in that, in described step B, each the grouping IP filter in the described grouping IP filter chain all comprises the block data protocol context call number field corresponding with this grouping IP filter.

7. secondary activating data transmitting method according to claim 2 is characterized in that, in described step B, the grouping IP filter in the described grouping IP filter chain is arranged in order according to priority order from high to low.

8. secondary activating data transmitting method according to claim 2, it is characterized in that, in described step B, the grouping IP filter at described grouping IP filter chain end is a sensing and the incoherent block data protocol context of this chain respective communication Traffic Profile, can handle according to the parameter of this block data protocol context when guaranteeing that described downlink data message can't mate.

9. gateway general grouping service wireless support node apparatus, the support secondary activating data is transmitted, and this gateway general grouping service wireless support node comprises the polylith service processing board, it is characterized in that, described service processing board comprises central processing unit and network processing unit, wherein:

When carrying out the downlink data message forwarding: