CN100387024C - Method for receiving data packet of wireless communication system network processing place - Google Patents
Method for receiving data packet of wireless communication system network processing place Download PDFInfo
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- CN100387024C CN100387024C CNB2004100705348A CN200410070534A CN100387024C CN 100387024 C CN100387024 C CN 100387024C CN B2004100705348 A CNB2004100705348 A CN B2004100705348A CN 200410070534 A CN200410070534 A CN 200410070534A CN 100387024 C CN100387024 C CN 100387024C
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Abstract
The present invention relates to a method for processing received data packets at a network side of a wireless communication system, which comprises: A, after a data packet is received by a network side, the network side judges whether a target MS address connection carried by the data packet is established, if true, step B is executed, else, step C is executed; B, the network side judges whether the established connection can transfer the data packet, if true, the established connection is used for sending out the data packet to the target MS, else, a connection notice is sent to the target MS; after the target MS modifies the established connection or reestablishes the connection, the data packet is sent to the target MS by the connection; C, the network side judges whether the target MS receiving the data packet establishes a connection with other target MS addresses according to corresponding relations, if true, the network side sends out a notice for establishing a connection to the target MS, and the data packet is sent to the target MS by using the connection after the connection is established by the target MS, if false, the network side discards the data packet.
Description
Technical field
The present invention relates to the treatment technology of wireless communication system to packet, particularly a kind of wireless communication system network processing place receives the method for packet.
Background technology
Along with the development of Packet data service, many wireless communication systems have all increased to be handled the entity of Packet data service or increase the function of handling Packet data service on existing entity.For example: code division multiple access (CDMA) 2000 systems have increased packet data serving node (PDSN, Packet Data ServingNode) Packet data service are changed, managed and controls; The general packet radio service gateway support node (GGSN) and the general packet wireless business support node (SGSN) of Wideband Code Division Multiple Access (WCDMA) (WCDMA) system are changed, are managed and control Packet data service.These entities also are responsible for and outside packet data network carries out alternately, receive the data from the external packet data network, and the application server in the external packet data network sends data.
At present, when the wireless communication system network side joint is received packet, the network side of wireless communication system uses and existingly sends packet to purpose MS with being connected of purpose travelling carriage (MS), thereby perhaps the process that connects of initiation and purpose MS connects and is used for transfer data packets.
For universal mobile telecommunications system (UMTS) system, the connection procedure of foundation and purpose MS is exactly the pdp context activation of being initiated by GGSN.
In existing standard 3GPPTS 23.060, receive that for UMTS grid side the processing procedure after the packet is: when GGSN receives a packet data protocol (PDP) protocol Data Unit (PDU) packet, check at first whether the pdp address that this PDP PDU packet will send to has set up a PDP Context: if having, the PDP Context that then direct use has been set up transmits PDP PDU packet; If do not have, then GGSN initiates network side activation, GGSN is for the static PDP information of network enabled side activating process need relevant for pdp address, also need to realize optional Gc interface and location management message between GGSN and the attaching position register (HLR), be used to transmit PDP PDU packet thereby set up a PDP Context.
The method flow diagram that the UMTS system network processing place of prior art receives packet as shown in Figure 1, its concrete steps are:
Step 100, GGSN receive after the PDP PDU packet, judges whether the UMTS system has set up the PDP Context of purpose MS, promptly whether set up the PDP Context of the destination address that PDP PDU packet will send, if, execution in step 101; Otherwise, execution in step 102;
The PDP Context that step 101, direct utilization have been set up sends PDP PDU packet to purpose MS;
Step 102, GGSN carry out buffer memory with the follow-up PDP PDU packet of receiving to this pdp address; The uncertain current SGSN address of GGSN for this pdp address service, be sent as the message (Send RouteingInfo for GPRS) that general packet radio service (GPRS) sends routing iinformation by the Gc interface to HLR, the parameter that this message comprises has: the mobile contracted user's sign of the estimation of the purpose MS of the static PDP information correspondence of this pdp address (IMSI);
Step 103, the HLR that receives this message judge whether to be this request service according to the IMSI of the signatory MS of storage in advance, if do not have the IMSI that this message is carried among Cun Chu the IMSI in advance, then execution in step 104; Otherwise, execution in step 105;
Step 104, HLR do not have the IMSI of storage purpose MS, be returned as the affirmation message (Send Routeing Info for GPRS Ack) that GPRS sends routing iinformation by the Gc interface to GGSN, this message is carried IMSI and the MAP error code of purpose MS, the MAP error code is used to indicate the reason that can't serve, process ends;
Step 105, HLR return Send Routeing Info for GPRSAck by the Gc interface to GGSN, comprise IMSI, the SGSN address of purpose MS in this message, change step 106 over to;
When being provided with mobile device inaccessible flag bit (MNRG in GPRS network among the HLR, when Mobile Station Not Reachable for GPRS flag) identifying the position, also comprise Mobile Station Not Reachable Reason in this message, be designated as No Paging Response;
Mobile Station Not Reachable Reason and the MNRG that is provided with in HLR are in order to reduce the inquiry times to HLR in the method, and the load that alleviates HLR is provided with;
Step 106, GGSN judge whether the SGSN address of receiving that Send Routeing Info for GPRS Ack carries, and do not receive the Mobile Station Not Reachable Reason that carries or receive that the Mobile Station Not Reachable Reason that carries is designated as No PagingResponse, if, execution in step 108; Otherwise, execution in step 107;
Step 107, GGSN will be provided with process ends to the MMRG flag bit of this purpose MS;
After being provided with the MMRG flag bit, when having when sending to GGSN with the PDP PDU packet of the corresponding identical pdp address of pdp address of this purpose MS, GGSN can find that this MMRG flag bit is provided with, just can not go to have visited HLR again;
The PDU notification request message that step 108, GGSN will send (PDU NotificationRequest) sends to SGSN;
Step 109, SGSN return PDU notice response message (PDU Notification Response) and give GGSN, confirm that SGSN will activate PDP Context according to the pdp address of appointment;
Step 110, SGSN send request PDP context activation message (Request PDP ContextActivation) and give purpose MS, requesting activation is specified the PDP Context of pdp address, comprising parameter have: Transaction Identifier TI, PDP type, pdp address and APN (APN);
Step 111, purpose MS are initiated to the pdp context activation of GGSN according to this message, and the PDP PDU packet to this pdp address that GGSN will transmit sends to purpose MS.
After step 111, when if purpose MS activation PDP Context is unsuccessful, SGSN can return to GGSN corresponding error cause value, and this value is carried at PDU notice response message or PDU notice refuse information, and GGSN can refuse or abandon the PDP PDU packet of receiving after receiving this message.Simultaneously, initiate unnecessary inquiry to HLR once more after receiving the PDP PDU packet of identical pdp address for fear of next time, the MNRG flag bit of this purpose MS can be set in GGSN, perhaps GGSN refuses all PDP PDU packets to this pdp address in certain section special time, and perhaps GGSN preserves use next time a period of time or the like with the SGSN address that obtains.When this purpose MS can activate PDP Context, then MS sent to HLR by SGSN and successfully activates PDP Context message, and HLR notifies GGSN successively according to the GGSN tabulation of preserving, and GGSN removes the MNRG flag bit that is provided with for this purpose MS.
At present, in PDP Context, have traffic flow template (TFT, Traffic FlowTemplate) parameter sometimes.TFT is made up of 1 to 8 packet filter, and each filter has a unique packet filtering sign and an assessment priority index.Each packet filter has a unique packet filtering sign, each packet filter also has an assessment priority index, this index is unique in the relevant TFT of a plurality of PDP Contexts of all public pdp addresses, and this index range is 255～0, and the more little priority of numeral is high more.MS is in charge of packet filtering sign and corresponding assessment priority index, and generates the content of packet filter.
A PDP Context can not have the TFT more than to be associated, and can only have a PDP Context not have TFT to be associated in a plurality of PDP Contexts of a whenever public pdp address at most, will comprise an effective packet filter among the TFT at least.
The attribute of TFT comprises: source address and subnet mask, Protocol Number among the IPv4 or the Next Header among the IPv6, destination slogan scope, the source port number scope, ipsec security parameter reference (SPI:Security Parameter Index), business-level (Traffic Class) among type of service TOS among mask and the IPv4 (TypeOf Service) or the IPv6, the stream label among the IPv6 (FlowLabel).
If all properties coupling in the parameter in PDP PDU head of receiving and the packet filter is so just thought a coupling that has found this packet filter, the process of mating according to priority index just can be out of use.Generally be to assess according to priority index order from high to low, up to coupling of discovery, otherwise failure.
Said method exists some shortcomings:
At first, said method has only when finding not set up PDP Context for this pdp address after GGSN receives PDP PDU packet, just initiates pdp context activation.Yet in reality, have this situation and occur, this pdp address has been set up PDP Context, but this PDP Context has been with this parameter of TFT when setting up.Being provided with of packet filter can cause this PDP PDU packet to check by TFT in the TFT entire parameter, so though there is the PDP Context that activates in the pdp address of this PDP PDU packet indication, but, cause these PDP PDU packets can't send purpose MS to by the PDP Context of having set up because TFT does not match.In this case, GGSN can only abandon these PDP PDU packets;
Secondly, need to support the Gc interface between GGSN and the HLR in said method, this interface clearly has been the interface of an optional realization in standard.But in the reality operation, this interface is not realized in nearly all operation commercial city.If there is not the existence of this interface, GGSN could determine SGSN at the SGSN address relevant with pdp address of preserving that can only paddle one's own canoe, but mobile network for wireless communication system, the SGSN address is constantly to change, and the SGSN address information that only is kept among the HLR is only the up-to-date SGSN for the corresponding purpose MS of specific pdp address.Therefore, do not realize that the GGSN of Gc interface can't network enabled side activating process.Also have, GGSN be used to inquire about the SGSN address send position administrative messag such as routing iinformation for GPRS also be the message of optional realization, need activate special realization in order to realize network side.
At last, GGSN is for the static PDP information of network enabled side activating process need relevant for pdp address in said method, but the static PDP information about pdp address does not define hereto, therefore when realizing, have different understanding, also be unfavorable for the correct realization that network side activates.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method of wireless communication system network side handle packet, and this method not only can not checked because of the TFT in the PDP Context that can't set up by this pdp address and cause packet loss; And do not need to rely on the realization of the location management message of Gc interface and HLR, thereby easier realization.
According to above-mentioned purpose, concrete technical scheme of the present invention is achieved in that
A kind of wireless communication system network processing place receives the method for packet, the mobile contracted user who has set up the purpose mobile station MS of packet data protocol PDP Context in general packet radio service gateway support node GGSN storage identifies IMSI, pdp address and is the corresponding relation between the wireless universal service business support node SGSN three of purpose MS service, and this method also comprises:
After A, GGSN receive PDP protocol Data Unit PDU packet, judge whether to store the corresponding relation that purpose MS that this packet will send to sets up, if, execution in step B; Otherwise, abandon this packet, finish;
B, GGSN judge whether to have set up the PDP Context of the pdp address correspondence of the purpose MS that this packet carries, if, execution in step C; Otherwise, execution in step D;
C, GGSN judge whether the PDP Context of having set up can transmit this packet, if utilize the PDP Context transmits data packets of having set up to purpose MS; Otherwise, GGSN sends to set up from packet to purpose MS by the SGSN for purpose MS service and will send the PDP Context notice of purpose MS address to GGSN, after purpose MS revised the PDP Context of having set up or rebulids PDP Context, GGSN utilized this PDP Context to send to purpose MS the packet of receiving;
D, GGSN judge according to corresponding relation whether the IMSI of the pdp address correspondence that receives this packet has other pdp addresses to set up PDP Context, if, execution in step E; Otherwise GGSN abandons this packet, finishes;
E, GGSN send to set up from packet to purpose MS by the SGSN for purpose MS address service and will send the PDP Context notice of purpose MS address to GGSN, after purpose MS set up PDP Context, GGSN utilized this PDP Context to send to purpose MS the packet of receiving.
Described wireless communication system is code division multiple access CDMA2000 system or Wideband Code Division Multiple Access (WCDMA) cdma system or general packet radio service GRPS system or universal mobile communications UMTS system.
When described wireless communication system was the UMTS system, the described GGSN of step C judged that whether the PDP Context of having set up can transmit this packet is according to whether judging by the traffic flow template TFT inspection of this PDP Context:
C1, GGSN judge whether the PDP Context of having set up exists TFT to check, if not, utilize the PDP Context transmits data packets of having set up to purpose MS; Otherwise, execution in step C2;
C2, GGSN judge that whether the TFT attribute set up PDP Context is complementary with the information that packet carries, if utilize the PDP Context transmits data packets of having set up to purpose MS; Otherwise GGSN is defined as the SGSN that purpose MS serves according to corresponding relation, by the message that the SGSN that determines has carried the requesting activation PDP Context of APN APN, pdp address, Transaction Identifier TI and PDP type to purpose MS transmission, execution in step C3;
After C3, purpose MS receive this message, purpose MS judges that this notice is will activate PDP Context or will revise the PDP Context that has activated, if will activate PDP Context, after purpose MS activated PDP Context, packet utilized the PDP Context of this activation to be sent to purpose MS; If will revise the PDP Context that has activated, after then purpose MS revised and activated the TFT of PDP Context or activated PDP Context again, packet utilized this activation PDP Context to be sent to purpose MS.
The described purpose MS of step C3 judges that this notice is that will to activate PDP Context or will revise the PDP Context that has activated be to judge according to pdp address and APN that this message is carried:
Whether judgement has existed the PDP Context of activation to this pdp address that should APN APN, if then be to revise the PDP Context that has activated; Otherwise, then be to activate a new PDP Context.
When wireless communication system was the UMTS system, being provided with in a plurality of PDP Contexts of a public pdp address to have a PDP Context not have TFT to be associated at most, and must have a PDP Context not have TFT to be associated.
Described purpose MS is and the purpose MS of more than one IMSI that has.
From such scheme as can be seen, the present invention proposes a kind of network side and receive the processing method of packet, by between the pdp address of the PDP Context of preserving the IMSI of a purpose MS on the GGSN and being set up, between the PDP Context that activates on each pdp address and this pdp address connects, MS and be corresponding relation between the SGSN of this MS service, make when network side is received packet, the pdp address that can utilize the corresponding relation of pdp address that existing PDP Context connects and IMSI will send for these packets is set up new PDP Context, make these packets purpose MS with send to purpose MS surely with regard to one when network side has PDP Context to be connected, avoided wrong packet loss, thereby can improve satisfaction service.Therefore, this method not only can not checked because of the TFT in the PDP Context that can't set up by this pdp address and cause packet loss; And do not need to rely on the realization of the location management message of Gc interface and HLR, thereby easier realization.
Description of drawings
Fig. 1 is the method flow diagram that the UMTS system network processing place of prior art receives packet.
The purpose MS that sets up PDP Context that Fig. 2 stores in GGSN for the present invention, pdp address, PDP Context connect and are the corresponding relation figure of the SGSN address of this purpose MS service.
Fig. 3 is the method flow diagram that UMTS system network processing place of the present invention receives packet.
Fig. 4 handles an embodiment flow chart of the packet of receiving for GGSN of the present invention.
Fig. 5 handles another embodiment flow chart of the packet of receiving for GGSN of the present invention.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, below lift specific embodiment and, the present invention is described in more detail with reference to accompanying drawing.
Purpose MS and GGSN have set up after the PDP Context, and the present invention preserves the IMSI of the purpose MS that has set up PDP Context and pdp address, is the corresponding relation of the SGSN address of this purpose MS service on GGSN.The purpose MS that sets up PDP Context that Fig. 2 stores in GGSN for the present invention, pdp address, PDP Context connect and are the corresponding relation figure of the SGSN address of this purpose MS service, as shown in the figure, suppose that a purpose MS has a plurality of IMSI, then carry out a plurality of IMSI and pdp address, the SGSN that serves for purpose MS corresponding according to the PDP Context set up respectively with this IMSI, wherein, same purpose MS of the present invention can have a plurality of IMSI, and each IMSI can corresponding a plurality of pdp addresses; A SGSN can be a plurality of purpose MS services with different IMS I; A pdp address can corresponding a plurality of PDP Contexts.The present invention can be static PDP address for pdp address without limits, also can be dynamic PDP addresses.The pdp address of an IMSI correspondence can be 11 at most, and the PDP Context of a pdp address correspondence mostly is 11 most, and the context number of the total co-activation of a plurality of pdp addresses of an IMSI correspondence can not be above 11.
GGSN is by preserving corresponding relation, just can be according to the pdp address of the PDP PDU packet indication of receiving, which the IMSI that judges this pdp address correspondence is, and then learns the SGSN address of serving for the purpose MS with this IMSI at present, thereby sends the PDU notification message to the SGSN that determines.
Fig. 3 is the method flow diagram that UMTS system network processing place of the present invention receives packet,
Its detailed process is:
The information that packet carries is source address and the many information of port numbers, destination address and port numbers or the like; So when judging whether can the TFT by PDP Context to check, check that exactly whether the information in the PDP PDU packet head be complementary with the TFT attribute of PDP Context;
The Transaction Identifier TI that step 305, purpose MS carry according to this message, PDP type, pdp address and APN revise the PDP Context of having set up, and PDP PDU packet can directly utilize amended this PDP Context to be transmitted to purpose MS;
When the IMSI of this pdp address correspondence does not have the activation PDP Context of other pdp addresses, this purpose MS and UMTS network are described without any contact, so GGSN abandons this PDP PDU packet, do not initiate the PDP context activation of network side.
In the described step 307 of Fig. 3, receive the PDU notice request of GGSN transmission as SGSN after, carry out according to initiation pdp context activation of the prior art, promptly send request PDP context activation message to purpose MS, the PDP Context of the pdp address of requesting activation appointment, comprising parameter: Transaction Identifier TI, PDP type, pdp address and APN; After purpose MS receives this message, initiate pdp context activation according to the pdp address of appointment.
When SGSN when purpose MS sends the PDP context activation request, pdp address and APN that purpose MS carries according to the request PDP context activation message that receives SGSN judge, if do not have the PDP Context that activates to pdp address that should APN is current, purpose MS initiates pdp context activation so; If have the PDP Context of activation to exist to this pdp address that should APN is current, illustrate that the TFT inspection do not pass through, purpose MS can select to revise the TFT of current PDP Context, perhaps initiates PDP Context activation again.No matter be modification process or activation again, the TFT that carries is that the PDP PDU bag that can allow the current network side receive is checked by TFT, because TFT determines according to APN that receives and pdp address information.
In the present invention, do not connect if set up any PDP Context between purpose MS and the network side, GGSN can't handle these PDP PDU packets that will arrive this purpose MS so.But consider on the existing bearer network and can carry various application,,, require to exist between purpose MS and the network PDP Context to connect so in order to carry out various business at portable terminal such as the IMS territory on the GPRS network.Lost if cause this PDP Context to connect for some reason, existing regulation and stipulation must be initiated process of reconstruction, will keep one at least and transmit the PDP Context connection that signaling needs.Therefore, in real application process, the possibility that exists PDP to connect between purpose MS and the network side is very big, uses the present invention and can not be subjected to too many restriction.
In addition, the present invention can not influence the enforcement of prior art, can realize separately, can realize together in conjunction with prior art yet.Promptly when connecting without any PDP Context between purpose MS and the network side, carry out the described step 102 of Fig. 1～step 111 in the prior art.
Below specify method provided by the invention for two example two.
Fig. 4 handles an embodiment flow chart of the packet of receiving for GGSN of the present invention, in the present embodiment, suppose to have PDP Context between GGSN and the purpose MS, and the pdp address that uses in the PDPPDU packet of the receiving pdp address that will send and this PDP Context is identical, but can't check that at the GGSN place step that GGSN carries out is by TFT:
Step 400, GGSN receive PDP PDU packet;
Step 401, GGSN are determined the SGSN of this purpose MS correspondence to send the PDU notice request to the SGSN that determines according to corresponding relation, and this request carries the APN of purpose MS correspondence of this PDP PDU packet and the pdp address that this PDP PDU packet will send; Simultaneously, GGSN is with the PDP PDU data pack buffer of follow-up this pdp address of receiving;
After step 402, SGSN receive this request, return PDU notice response message, confirm that SGSN will ask MS to activate PDP Context according to the pdp address of appointment to GGSN;
Step 403, SGSN send request PDP context activation message to purpose MS, and requesting activation is specified the PDP Context of pdp address, and the parameter that this message carries is: Transaction Identifier TI, PDP type, pdp address and APN;
After step 404, purpose MS receive the request PDP context activation message of SGSN, according to wherein the pdp address and the APN of band judge, have the PDP Context of activation to exist if this pdp address of corresponding this APN is current, explanation is that execution in step 405 is not passed through in the TFT inspection; Otherwise, execution in step 406;
The PDP Context of this pdp address of step 405, purpose MS execution APN is activation again, perhaps carries out the PDP context modification of this pdp address of APN, promptly revises the TFT of the PDP Context that has activated;
Step 406, purpose MS carry out the pdp context activation of this pdp address of APN.
Fig. 5 handles another embodiment flow chart of the packet of receiving for GGSN of the present invention, in the present embodiment, suppose that GGSN checks the pdp address that the PDP PDU packet receive will send, not PDP Context existence actively accordingly, but preserve the corresponding relation of this pdp address and purpose MS, and the PDP Context of the activation of other pdp addresses is arranged between GGSN and the corresponding purpose MS, the step that GGSN carries out is:
Step 500, GGSN receive PDP PDU packet;
Step 501, GGSN are determined the SGSN of this purpose MS correspondence to send the PDU notice request to the SGSN that determines according to corresponding relation, and this request carries the APN of purpose MS correspondence of this PDP PDU packet and the pdp address that this PDP PDU packet will send; Simultaneously, GGSN is with the PDP PDU data pack buffer of follow-up this pdp address of receiving;
After step 502, SGSN receive this request, return PDU notice response message, confirm that SGSN will ask MS to activate PDP Context according to the pdp address of appointment to GGSN;
Step 503, SGSN send request PDP context activation message to purpose MS, and requesting activation is specified the PDP Context of pdp address, and the parameter that this message carries is: Transaction Identifier TI, PDP type, pdp address and APN;
Step 504, purpose MS receive after the request PDP context activation message of SGSN, carry out the pdp context activation of this pdp address of APN.
The present invention can also set in advance in a plurality of PDP Contexts of an at any time public pdp address can only have a PDP Context not have TFT to be associated at most, and must have a PDP Context not have TFT to be associated.Like this, as long as behind the PDP PDU packet that network side receives, as long as there is the PDP Context that activates in the pdp address that this packet will send, be sent to purpose MS surely with regard to one, promptly when this PDP PDU can't check by other TFT, just can directly utilize this PDP Context that does not have TFT to check to transmit this packet.
But can there be some problems in this method: at first will revise the realization of existing standard, this way that optional parameters is defined as mandatory parameter can influence existing device; Secondly, this method may be brought the problem of secure context, because the PDP Context that does not have TFT to check can receive any packet in principle,, the packet of some attacks may be handed down to purpose MS if the borde gateway of GGSN and fire compartment wall do not play effect.
The method that network side provided by the invention is handled the packet that is received not only can be applied in the UMTS system, also can be applied in the network system of other various access styles, for example: WCDMA system, CDMA2000 system etc.
When in the network system that is applied in other various access styles, the purpose MS that has connected in network side storing and will send the corresponding relation of the address that packet has in advance, then in the time will sending packet, judge whether the address that this packet has has set up connection: if set up connection, judge whether the connection of having set up can transmit this packet, if directly packet is sent to purpose MS; Otherwise then network side notice purpose MS sets up the connection from network side to the address that this packet has, and purpose MS rebulids to connect or revise to have and connects, and packet sends to purpose MS along this connection.If do not connect, judging whether other addresses that this purpose MS has have with network side is connected, if having, then network side notice purpose MS sets up the connection from network side to the address that this packet has, purpose MS connects, and packet sends to purpose MS along the connection of setting up.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a wireless communication system network processing place receives the method for packet, it is characterized in that, the mobile contracted user who has set up the purpose mobile station MS of packet data protocol PDP Context in general packet radio service gateway support node GGSN storage identifies IMSI, pdp address and is the corresponding relation between the wireless universal service business support node SGSN three of purpose MS service, and this method also comprises:
After A, GGSN receive PDP protocol Data Unit PDU packet, judge whether to store the corresponding relation that purpose MS that this packet will send to sets up, if, execution in step B; Otherwise, abandon this packet, finish;
B, GGSN judge whether to have set up the PDP Context of the pdp address correspondence of the purpose MS that this packet carries, if, execution in step C; Otherwise, execution in step D;
C, GGSN judge whether the PDP Context of having set up can transmit this packet, if utilize the PDP Context transmits data packets of having set up to purpose MS; Otherwise, GGSN sends to set up from packet to purpose MS by the SGSN for purpose MS service and will send the PDP Context notice of purpose MS address to GGSN, after purpose MS revised the PDP Context of having set up or rebulids PDP Context, GGSN utilized this PDP Context to send to purpose MS the packet of receiving;
D, GGSN judge according to corresponding relation whether the IMSI of the pdp address correspondence that receives this packet has other pdp addresses to set up PDP Context, if, execution in step E; Otherwise GGSN abandons this packet, finishes;
E, GGSN send to set up from packet to purpose MS by the SGSN for purpose MS address service and will send the PDP Context notice of purpose MS address to GGSN, after purpose MS set up PDP Context, GGSN utilized this PDP Context to send to purpose MS the packet of receiving.
2. the method for claim 1 is characterized in that, described wireless communication system is code division multiple access CDMA2000 system or Wideband Code Division Multiple Access (WCDMA) cdma system or general packet radio service GRPS system or universal mobile communications UMTS system.
3. method as claimed in claim 2, it is characterized in that, when described wireless communication system was the UMTS system, the described GGSN of step C judged that whether the PDP Context of having set up can transmit this packet is according to whether judging by the traffic flow template TFT inspection of this PDP Context:
C1, GGSN judge whether the PDP Context of having set up exists TFT to check, if not, utilize the PDP Context transmits data packets of having set up to purpose MS; Otherwise, execution in step C2;
C2, GGSN judge that whether the TFT attribute set up PDP Context is complementary with the information that packet carries, if utilize the PDP Context transmits data packets of having set up to purpose MS; Otherwise GGSN is defined as the SGSN that purpose MS serves according to corresponding relation, by the message that the SGSN that determines has carried the requesting activation PDP Context of APN APN, pdp address, Transaction Identifier TI and PDP type to purpose MS transmission, execution in step C3;
After C3, purpose MS receive this message, purpose MS judges that this notice is will activate PDP Context or will revise the PDP Context that has activated, if will activate PDP Context, after purpose MS activated PDP Context, packet utilized the PDP Context of this activation to be sent to purpose MS; If will revise the PDP Context that has activated, after then purpose MS revised and activated the TFT of PDP Context or activated PDP Context again, packet utilized this activation PDP Context to be sent to purpose MS.
4. method as claimed in claim 3 is characterized in that, the described purpose MS of step C3 judges that this notice is that will to activate PDP Context or will revise the PDP Context that has activated be to judge according to pdp address and APN that this message is carried:
Whether judgement has existed the PDP Context of activation to this pdp address that should APN APN, if then be to revise the PDP Context that has activated; Otherwise, then be to activate a new PDP Context.
5. method as claimed in claim 2, it is characterized in that, when wireless communication system was the UMTS system, being provided with in a plurality of PDP Contexts of a public pdp address to have a PDP Context not have TFT to be associated at most, and must have a PDP Context not have TFT to be associated.
6. the method for claim 1 is characterized in that, described purpose MS is and the purpose MS of more than one IMSI that has.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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