CN1192565C - Internet access method based on radio block network gateway - Google Patents
Internet access method based on radio block network gateway Download PDFInfo
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- CN1192565C CN1192565C CNB02124183XA CN02124183A CN1192565C CN 1192565 C CN1192565 C CN 1192565C CN B02124183X A CNB02124183X A CN B02124183XA CN 02124183 A CN02124183 A CN 02124183A CN 1192565 C CN1192565 C CN 1192565C
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Abstract
The present invention discloses an internet access method based on a radio block network gateway. A local area network and a radio block service network are mutually connected with a radio block network gateway with the double channel function by an access controller (AC) and are accessed to an external data network by the radio block network gateway. The method comprises the following steps: a terminal is communicated with the radio block network gateway by a radio block network channel to establish a local area network channel; if the local area network channel is successfully established, then the terminal sends a packed upstream data pack to the radio block network gateway by the local area network channel, and the upstream data pack is forwarded to an external data network after being unpacked by the radio block network gateway; the radio block network gateway sends a packed downstream data pack sent by the external data network to an AC, and the packed downstream data pack is forwarded to the terminal via the local area network channel after being unpacked by the AC. The method can provide double channels for a user to communicate, which leads that a terminal user can enjoy wide area coverage and rapid access, and the high-speed radio access can also be guaranteed in a local area.
Description
Technical field
The present invention relates to the communication technology in the grouping service wireless, refer to a kind of internet access method that is applicable to GPRS (GPRS) especially based on radio block network gateway.
Background of invention
At present, data transmission technology develop rapidly on the mobile communications network, GPRS (GPRS, General Packet Radio Service) be exactly at global system for mobile communications (GSM, Global System for Mobile Communications) a kind of general packet data transmission technology that develops on the network foundation, promptly usually said 2.5G mobile communication technology.GPRS adopts the GSM base station sub-system (BSS through upgrading, Base Station Sub-system), finish the function of authentication, mobile management and packet data transmission of access, the user identity of wireless network by Serving GPRS Support Node (SGSN, Serving GPRS Support Node); Finish the function of access outer data networks such as (Internet) by Gateway GPRS Support Node (GGSN, Gateway GPRS Support Node).Because GPRS develops on the GSM basis, therefore inherited GSM authentification of user, mobile management and wide area cover and roaming aspect advantage, and the design philosophy of GPRS and technology have obtained further succession at the packet-based core networks of Wideband Code Division Multiple Access (WCDMA) (WCDMA).
In theory, current GPRS network can provide the transmission rate about about 100Kbps, but in actual applications, because factors such as the number of channel that frequency resource-constrained, multiple users share, terminal can bundle is limited, the bandwidth that the user obtains will be far below this numerical value, at present the flank speed that can support of terminal has only about 40kbps, and this speed also need relatively just can reach under the situation of abundance in the network channel resource.
Along with the user is more and more higher to the requirement of wireless access rate, WLAN (wireless local area network) (WLAN, Wireless Local Area Network) arise at the historic moment, it is a kind of based on the 802.11b/a standard, the technology that can provide high speed wireless data to insert in more among a small circle.Fig. 1 is the classical group web frame schematic diagram of existing WLAN, as shown in Figure 1, WLAN generally comprises access point (AP, Access Pont), access controller (AC, Access Controller), authentication server and DHCP (DHCP, Dynamic Host Configuration Protocol) equipment, AC not only connects all AP, authentication server and DHCP equipment, and connects Internet protocol (IP) network by inlet (Portal) server simultaneously.The terminal use connects AP by wireless mode, and by data networks such as AC access Internet, AC controls user's visit here.Terminal use's access procedure is like this: each terminal use inserts with wireless mode with oneself number of the account and password, utilizes authentication server to carry out authentication earlier, then by DHCP distributing IP address; Or earlier by DHCP distributing IP address, terminal is logined Portal server under the situation of authentication not then, carries out the authentication of number of the account and password, and after authentication was passed through, AC just allowed other online website of this user accesses data.This WLAN can obtain the transmission rate up to 11Mbps in the nearer zone of distance W LAN AP, and equipment price is cheap.
Though WLAN can provide high-speed local area network to insert, its coverage is very limited, and the frequency range of use is interfered easily, and mobility is relatively poor, is not suitable for carrying out large-scale mobile network and covers continuously.In addition, there is not at present the so ripe network of can majority state covering the whole world, can roam of GSM/GPRS network in WLAN yet, for the user who roams into the strange land, owing to there is not the online number of the account of local WLAN operator, business is difficult to use, and, in the fail safe of authentification of user, a certain distance is also arranged with GPRS.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of internet access method based on radio block network gateway, can communicate for the user provides radio block network and local area network (LAN) binary channels, make the terminal use can enjoy wide area and cover and high-speed mobile, can guarantee that again high-speed radio inserts in some areas.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of internet access method based on radio block network gateway, be applicable to GPRS (GPRS), the radio block network gateway of local area network (LAN) and grouping service wireless Netcom being crossed access controller (AC) and having a binary channels function interconnects, and via this radio block network gateway access outer data network, this access controller (AC) is BAS Broadband Access Server (BAS) or is layer three switch (L3 Switch); Its key is that this method comprises the following step:
A. terminal is communicated by letter with radio block network gateway by the radio block network passage, set up the local area network (LAN) passage between terminal and the radio block network gateway,, then enter step b if this local area network (LAN) passage is set up successfully, otherwise radio block network gateway selects radio block network passage and terminal to continue to communicate by letter automatically;
B. terminal to radio block network gateway, after the radio block network gateway decapsulation, is forwarded to external data network by the upstream data bag of local area network (LAN) passage transmission process encapsulation;
C. radio block network gateway downlink data packet that this external data network is sent out is issued AC after through encapsulation, after the AC decapsulation, is transmitted to terminal by the local area network (LAN) passage.
This method further comprises: after the local area network (LAN) passage connects foundation, the terminal use carries out handshake operation by timing of local area network (LAN) passage and radio block network gateway, radio block network gateway sends new random number in each handshake response, terminal receives that the back generates new authenticator in encapsulated data packet subsequently.Continuously failure N time and do not receive new upstream data bag if shake hands, then radio block network gateway is changed to current local area network (LAN) channel status in the PDP Context unavailable, and wherein N is a positive integer.
This method further comprises: initiatively cut off twin-channel when related when the user roams out current local area network (LAN) or user, terminal is changed to current local area network (LAN) channel status unavailable, and the notice radio block network gateway, radio block network gateway also is changed to current local area network (LAN) channel status unavailable.
In said process, when local Netcom road state is set to when unavailable, radio block network gateway is selected radio block network channel transfer data automatically.
In the present invention, the terminal use is after definite local area network (LAN) passage is set up, still can continue to keep this terminal use's radio block network passage, so, when this terminal use was switched between radio block network and local area network (LAN) or between two local area network (LAN)s, its upper-layer service was directly switched between radio block network passage and local Netcom road continuously.
This method will increase the association attributes of definition local area network (LAN) in PDP Context, comprise local area network (LAN) channel status, LAN IP address, AC address, user encryption key, random number and encapsulation key at least.Terminal is when encapsulating, and the encapsulation key is generated by encryption key and the random number that radio block network gateway issues.
The present invention is that GPRS (GPRS) net and wireless lan (wlan) is interrelated by the Gateway GPRS Support Node (GGSN) with binary channels function, inserts outer data network via this GGSN.In such cases, step a further comprises:
A1. after the terminal use enters the WLAN net, judge whether the current WLAN passage is available earlier,,, adopt dynamic address allocation (DHCP) agreement, to the WLAN net application WLAN IP address that AC managed then by the WLAN passage if available;
A2. after obtaining WLAN IP address, terminal is initiated related request by the GPRS channel to GGSN;
After a3.GGSN receives this request, wherein WLAN IP address is deposited in packet data protocol (PDP) context that comprises the currently used GPRS IP of this terminal use address, and return related request response;
A4. after terminal is received response, utilize the WLAN passage to send test request to GGSN;
After a5.GGSN received test request, it was available that the WLAN channel status is set, and confirmed the foundation of WLAN passage, and returned the test request response.
Encapsulation described in the said method is meant the GRE encapsulation, and therefore, step b further comprises:
B1. after terminal is carried out the GRE encapsulation first time to the upstream data that will send, send to AC, wherein the outer purpose IP address of packet is GGSN IP address;
B2.AC issues GGSN after the GRE encapsulation of data of receiving is carried out secondary GRE encapsulation, and wherein the destination address of GRE packet is the GGSN public ip address of configuration, and source address is the public ip address of AC;
B3.GGSN is with the upstream data bag decapsulation of receiving, preserve AC IP address, if the processing module of terminal uses WLAN IP to be source address in original message, then this moment, GGSN will replace with GPRS IP address by WLAN IP with source address in the original message, then this packet is issued external data network, if terminal processing module directly uses GPRS IP to be source address, then directly this packet is issued external data network after the GGSN decapsulation herein in original message.
Therefore, the internet access method based on radio block network gateway provided by the present invention has following advantage and characteristics:
1) owing to the present invention radio packet network and local area network (LAN) are combined, for the user provides radio block network and two kinds of passages of local area network (LAN) simultaneously, make the user can be as required and the current state of passage select best passage to insert online, when the user is in the local area network (LAN) overlay area, can select local area network (LAN) transmission data; When the user is in beyond the local area network (LAN) overlay area, then utilize radio packet network transmission data,, both can insert at a high speed to guarantee best laser propagation effect, again can high-speed mobile, cover wider zone, and flexibility is higher.
2) owing to the present invention is mapped terminal use's LAN IP address and its radio block network IP address, as long as the user is through the safety certification of radio block network, the legitimacy of user identity just can be confirmed, when using the local area network (LAN) passage, need not the reauthentication identity, thereby the local area network terminal user can be switched in two kinds of passages arbitrarily, guaranteed the twin-channel seamless fusion of local area network (LAN) and radio block network, simplified access procedure, provide convenience for the user uses; And because radio block network channel security height, thereby guaranteed the reliability of authentification of user.
3) the present invention adopts LAN IP address and its radio block network IP address correlation of a PDP Context with the local area network terminal user, makes that control and realization are all very simple, convenient.
4) the present invention is in data transmission procedure, packet is carried out twice GRE encapsulation, and only use GPRS IP address to communicate by letter with external data network, with assurance current all local area network (LAN)s of outside net mask and radio block network are inserted passage for two kinds, thereby make the switching of passage not produce any influence to external world.
5) the present invention can still keep the radio block network passage to continue when using the local area network (LAN) passage, thereby in consumption systems channel resource not, guarantees the continuity of upper-layer service, and then guarantee the seamless switching between radio block network and the local area network (LAN).
6) the present invention with radio block network as secret channel transfer initial encryption key and random number, terminal and radio block network gateway are according to the Key in initial encryption key and the random number generation GRE data packet head, be used for the communication checking of data message on the local area network (LAN) passage, thus the fail safe that broadcast type access networks such as raising local area network (LAN) are not illegally usurped.
7) the present invention does not have specific (special) requirements to hardware, as long as terminal has common local area network (LAN) network interface card and common packet radio network termination to use, local area network (LAN) network interface card and packet radio network termination that terminal is used can be unified, and also can separate; The equipment such as AC, AP of existing local area network (LAN) also can prolong usefulness, thereby guarantee that interconnecting with communicating by letter of radio block network and local area network (LAN) is easier to realization.
8) the present invention has unloaded the service traffics of hot zones radio block network with local area network (LAN), reduced consumption to the radio block network frequency resource, be implemented in taking over seamlessly between radio block network passage and the local Netcom road by radio block network gateway simultaneously, improve message transmission rate and quality of service greatly in the area that has local net network to cover; And the present invention also helps and carries out unified business provide on radio block network/local area network (LAN), and the professional independence that provides with transmission channel is provided, makes the advantage of local area network (LAN) high-speed local area network network and radio block network slow wan network fully be able to complementation.
Description of drawings
Fig. 1 is the classical group web frame schematic diagram of existing WLAN;
Fig. 2 is GPRS among the present invention and networking structure schematic diagram after WLAN combines;
The process chart that Fig. 3 inserts for terminal use among the present invention.
Embodiment
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
As shown in Figure 2, GPRS backbone network 200 interconnects by access controller (AC) and GGSN+ with WLAN 201, and the terminal use can pass through WLAN 201 access GPRS backbone networks 200, and then via the GGSN+ access external data network of GPRS.This AC can adopt different equipment according to the difference of actual networking, such as: BAS Broadband Access Server (BAS), layer three switch (L3Switch) or the like, this GGSN+ is meant the GGSN equipment with the association of WLAN/GPRS binary channels, access, handoff functionality, in order to realize binding, selection and the switching of WLAN, two kinds of passages of GPRS, the present invention is just at the superposeed enhancement mode GGSN of minority of original GPRS net one side, that is: increase a spot of GGSN+, be exclusively used in the access of GPRS/WLAN binary channels mode.In GPRS backbone network 200, CG (Charging Gateway) is a charging gateway, is used for the preliminary treatment charge information; The name server that links to each other with CG (DNS) is responsible for the domain name mapping in the GPRS backbone network; The charging center that links to each other with GPRS backbone network 200 (Billing Center) is used to handle and settle accounts all station message recordings.
For the terminal use who makes WLAN can insert the GPRS backbone network by WLAN, the present invention will dispose WLAN/GPRS bimodulus card or dispose independently WLAN network interface card and GPRS card or only dispose common WLAN network interface card in equipment in WLAN user's terminal equipment, but connect the GPRS portable terminal by serial ports, interface such as infrared simultaneously, wherein, terminal equipment is meant portable machine or PDA.The present invention is in configurating terminal device hardware, and corresponding this terminal equipment is provided with special-purpose access processing module, to realize mutual between terminal and the GGSN.
As shown in Figure 3, the terminal use comprises the steps at least that via the implementation procedure of WLAN, GPRS online wherein, the GGSN that is mentioned all refers to have the GGSN+ of binary channels access function.
Step 301, terminal use enter into after the wlan network, judge by inserting processing module whether the current WLAN passage is available earlier, if the WLAN passage is unavailable, then the terminal packet that will send arrives GGSN according to the forwarding process of standard through GSM/GPRS wireless channel, base station sub-system (BSS), SGSN, insert outer data network thus, as Ineternet/Intranet, because also link to each other with GSM/GPRSBSS when as can be seen from Figure 2, terminal equipment connects WLAN by wireless mode.
If the WLAN passage can be used, then by the WLAN passage, adopt the DHCP agreement, by inserting processing module to the WLAN ground network application WLAN IP address that AC managed of carrying out the wlan network access control, AC gives the corresponding WLAN IP of this terminal distribution address by DHCP.
The access processing module of step 302-303, this terminal is initiated the related request of WLAN/GPRS Start-WLAN-Req by the GPRS passage to the GGSN with binary channels access function, comprising WLAN IP address, GGSN deposits WLAN IP address in corresponding packet data protocol (PDP) context in, shows that this WLAN IP and current GPRS IP represent same user.Because the GPRS passage is more safe and reliable passage, and the user on the GPRS passage has passed through safety identification authentication, therefore, as long as GGSN knows terminal WLAN IP address and GPRS IP address correspondence and same user, corresponding user identity repeats authentication again with regard to not needing, the legitimacy of user identity just can confirm that also corresponding cost also can count in same user's the expense number of the account, has guaranteed the legitimacy and the fail safe of WLAN terminal user ID safety certification thus.
GGSN returns related request response Start-WLAN-Rsp to the access processing module of terminal, wherein contains information such as GGSN IP address, encryption key and random number.The top PDP Context of mentioning is used for recording user information and session information, the basic format of PDP Context is as shown in table 1, because PDP Context is used to write down the information of GPRS/WLAN dual-channels communication among the present invention, therefore, needing in the PDP Context increases corresponding attribute, and the attribute format that is increased is as shown in table 2.
| Domain name | Describe |
| IMSI | International mobile subscriber identity |
| NSAPI | Network layer Service Access point identification code |
| MSISDN | Travelling carriage ISDN number |
| PDP?Type | The PDP type, such as: X.25, PPP, or IP. |
| PDP?Address | Pdp address, such as: address X.121 |
| Dynamic?Address | The indication pdp address is a static state or dynamic |
| APN?inUse | The APN network identity of current use |
| QoS?Profile?Negotiated | Consult definite QoS parameter |
| SGSN?Address | Serve the IP address of the SGSN of current mobile station |
| MNRG | The mobile subscriber is current is changed to unreachable state at HLR in indication |
| Recovery | Whether indication SGSN finishes the recovery of database |
| SND | Send to the GTP sequence number of the next down link N-PDU of SGSN |
| SNU | GTP sequence number from the next up link N-PDU of SGSN |
| Charging?Id | Charging identifier, the identification station message recording is generated by SGSN or is generated by GGSN |
| Reordering?Required | Indicate GGSN and whether need the N-PDUs that resequences and receive from SGSN |
Table 1
| Domain name | Describe |
| WLAN?Status | Whether indication WLAN passage is available, and whether the WLAN passage is set up |
| WLAN?IP | The IP address of indicating this user to use on the WLAN passage associates with the PDP Address of table 1, represents same user |
| AC?Address | Indication enters into the IP address of the Access Controller of GGSN from wlan network, carries out tunnel encapsulation when being used for GGSN and issuing packet |
| Subscriber?Key | GGSN is the interim encryption key that this user generates by certain algorithm, is used for adopting certain cryptographic algorithm to generate the Key in GRE packet header together with RAND |
| RAND | Random number is used to generate GRE Key, can dynamically change in shaking hands at every turn |
| GREKey | Key with in the GRE packet header of Subscriber Key and current RAND generation is used to differentiate whether GRE packet transmit leg is validated user |
Table 2
Step 304-305, this terminal are passed through the WLAN passage to GGSN sendaisle test request Test-WLAN-Req, after GGSN receives request, confirm that the WLAN passage is available, then the WLAN passage in the PDP Context is arranged to upstate, then to terminal backward channel test response Test-WLAN-Rsp.
The packet that the access processing module of step 306-308, this terminal will send encapsulates, the mode of this encapsulation has a lot, be to carry out tunnel encapsulation in the present embodiment according to Generic Routing Encapsulation (GRE), so-called gre tunneling encapsulation just is meant GRE head of encapsulation outside the IP bag, encapsulate one deck IP outside the GRE head again, the original message of outer field IP bag destination address or source address and internal layer is different, to reach control, to change the effect that IP wraps forward-path.Among the present invention, outer purpose IP address is GGSN IP address, is GGSN with the destination address that guarantees this GRE data message.Insert processing module and generate authenticator as the key in the GRE head (Key) with encryption key and the random number that GGSN issues, MSISDN is encapsulated in the field of GRE.The generation of this check word be with encryption key and random number as input, GRE Key utilizes the cryptographic algorithm of standard again as output, such as: the GSMA8 algorithm calculates.
When this packaged GRE packet passes through AC in process of transmitting, by AC or the external router of AC it is carried out secondary GRE encapsulation, destination address is the GGSN public ip address of configuration, and source address is the public ip address of AC, afterwards, AC will be sent to GGSN through the packet of secondary encapsulation again.To sending the purpose difference that packet carries out twice GRE encapsulation, the purpose of carrying out encapsulation for the first time is to make packet through GGSN in the present embodiment, that is: purpose IP address is GGSN; The purpose of encapsulation is to give GGSN with the AC address strap for the second time, and GGSN knows how downlink data packet is encapsulated like this.
GGSN is with the upstream data bag decapsulation of receiving, preserve AC IP address, and source address in the original message replaced with GPRS IP address by WLAN IP, issue the application server of Internet net at last, purpose is to guarantee that the packet rs destination address of returning the website is the GPRSIP that terminal inserts processing module, can arrive GGSN through routing forwarding.In fact, whether GGSN replaces source address behind decapsulation upstream data bag depends on the packing forms of terminal processing module to packet, if terminal processing module directly uses GPRS IP to encapsulate as source address in original message, GGSN just needn't carry out the source address conversion again after decapsulation so; If terminal processing module uses WLAN IP to encapsulate as source address in original message, then GGSN forwards packet just the source address in the original message need be converted to GPRS IP by WLAN IP after decapsulation after again, which kind of processing mode no matter is as long as the packet that guarantees to be transferred at last in the external data network uses GPRS IP address as source address.
Step 309-311, application server send downlink data packet to terminal, can use as if indication WLAN passage in the PDP Context of downlink data packet correspondence, then this packet is through GGSN the time, GGSN replaces with WLAN IP address with destination address in this downlink data packet by GPRS IP, the AC IP that preserves with PDP Context carries out after the GRE encapsulation to this downlink data packet, mail to AC, issue terminal through the WLAN passage by after the AC decapsulation.The purpose of carrying out address transition among the GGSN is in order to allow outer data network only need see GPRS network, thus guarantee packet that external network returns must the road through GGSN, make the switching of passage not produce any influence to external world again simultaneously.
Step 312, user carry out handshake operation by timing of WLAN passage and GGSN, and GGSN sends new random number in each handshake response, generate new authenticator for terminal in GRE packet subsequently; Fail N time continuously if shake hands, and do not receive new upstream data bag, GGSN thinks that the WLAN passage breaks down, then be changed to current WLAN channel status in the PDP Context unavailable, thereafter downlink data is no longer done address transition and GRE encapsulation, directly packet is handled according to the GPRS forwarding process of standard, directly be handed down to terminal by the GPRS passage, promptly SGSN and the wireless channel by GPRS issues.Here, N is a positive integer.
In said process, if the WLAN passage can be used, then the GPRS passage connects foundation as control channel, and GGSN mails to downlink data packet the WLAN passage automatically and transmits; If the WLAN passage is unavailable, then GGSN selects GPRS channel transfer data automatically, and this moment, GPRS was as data transmission channel, and the conversion between the passage is transparent fully to external website or upper-layer service.
In said process, when the user roams out wlan network, or the user initiatively cuts off twin-channel when related, execution in step 313 and 314 then, terminal is changed to current WLAN channel status unavailable, and sends out to GGSN and to stop related request Stop-WLAN-Req, and GGSN is changed to current WLAN channel status unavailable, return then and stop associated response Stop-WLAN-Rsp and give terminal, packet after this will be from the GPRS channel transfer.
In last network process, can determine whether the WLAN passage continues to keep the GPRS passage after setting up according to inserting being provided with of processing module in the terminal, keep not consumption systems channel resource of GPRS passage, keep if continue, the terminal use is switched between two kinds of passages, and the continuity of upper-layer service when guaranteeing that the user is switched between WLAN and GPRS, WLAN and wlan network (can be discontinuous); Certainly, this GPRS passage can not keep yet, and upper-layer service will be interrupted when like this user leaves original wlan network, need initiate GPRS passage activation again.
Transmit the ticket that data produced for the WLAN passage, to in GGSN, generate, adopt the format of billing of GPRS standard among the GSM12.15, and will be wherein no field, as: the SGSN address setting becomes special value, so that the charging center can know that this is a WLAN ticket, thereby can adopt the rate different with the GPRS ticket to charge.
By said process as can be seen, the present invention adopts WLAN/GPRS binary channels handoff technique, can provide high speed access, high-speed mobile, the overlay area is wide and reliability is high service for the user.And the present invention is not only applicable to GPRS and WLAN, and GPRS can be replaced by other radio block network, such as: WCDMA packet-based core networks (WCDMA PS); WLAN also can replace with wired Local Area Network.In a word, the above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (15)
1, a kind of internet access method based on radio block network gateway, be applicable to general packet radio service gprs, the radio block network gateway of local area network (LAN) and grouping service wireless Netcom being crossed access controller AC and having a binary channels function interconnects, and, it is characterized in that this method may further comprise the steps via this radio block network gateway access outer data network:
A. terminal is communicated by letter with radio block network gateway by the radio block network passage, set up the local area network (LAN) passage between terminal and the radio block network gateway, if this local area network (LAN) passage is set up successfully, then enter step b, otherwise radio block network gateway selects radio block network passage and terminal to continue to communicate by letter automatically;
B. terminal to radio block network gateway, after the radio block network gateway decapsulation, is forwarded to external data network by the upstream data bag of local area network (LAN) passage transmission process encapsulation;
C. radio block network gateway downlink data packet that this external data network is sent out is issued AC after through encapsulation, after the AC decapsulation, is transmitted to terminal by the local area network (LAN) passage.
2, method according to claim 1, it is characterized in that this method further comprises: after the local area network (LAN) passage connects foundation, the terminal use carries out handshake operation by timing of local area network (LAN) passage and radio block network gateway, radio block network gateway sends new random number in each handshake response, terminal receives that the back generates new authenticator in encapsulated data packet subsequently.
3, method according to claim 2, it is characterized in that this method further comprises: if shake hands continuously failure N time and do not receive new upstream data bag, then radio block network gateway is changed to current local area network (LAN) channel status in the PDP Context unavailable, and wherein N is a positive integer.
4, method according to claim 1, it is characterized in that this method further comprises: when the user roams out current local area network (LAN), terminal is changed to current local area network (LAN) channel status unavailable, and the notice radio block network gateway, radio block network gateway also is changed to current local area network (LAN) channel status unavailable.
5, method according to claim 1, it is characterized in that this method further comprises: when the user initiatively cuts off twin-channel association, terminal is changed to current local area network (LAN) channel status unavailable, and the notice radio block network gateway, radio block network gateway also is changed to current local area network (LAN) channel status unavailable.
6, according to claim 3,4 or 5 described methods, it is characterized in that this method further comprises: when local Netcom road was unavailable, radio block network gateway was selected radio block network channel transfer data automatically.
7, method according to claim 1 is characterized in that this method further comprises: the terminal use still continues to keep this terminal use's radio block network passage after definite local area network (LAN) passage is set up; When this terminal use was switched between radio block network and local area network (LAN) or between two local area network (LAN)s, its upper-layer service was directly switched between radio block network passage and local Netcom road continuously.
8, method according to claim 1, it is characterized in that this method further comprises: in PDP Context, increase the association attributes of definition local area network (LAN), comprise local area network (LAN) channel status, LAN IP address, AC address, user encryption key, random number and encapsulation key at least.
9, according to claim 1 or 8 described methods, it is characterized in that: terminal is when encapsulating, and the encapsulation key is generated by encryption key and the random number that radio block network gateway issues.
10, method according to claim 1 is characterized in that: this method is interrelated by the ggsn GGSN with binary channels function with GPRS net and WLAN (wireless local area network) WLAN, inserts outer data network via this GGSN.
11,, it is characterized in that step a further comprises according to claim 1 or 10 described methods:
A1. after the terminal use enters the WLAN net, judge whether the current WLAN passage is available earlier,,, adopt Dynamic Host Configuration Protocol, to the WLAN net application WLAN IP address that AC managed then by the WLAN passage if available;
A2. after obtaining WLAN IP address, terminal is initiated related request by the GPRS channel to GGSN;
After a3.GGSN receives this request, wherein WLAN IP address is deposited in the PDP Context that comprises the currently used GPRS IP of this terminal use address, and return related request response;
A4. after terminal is received response, utilize the WLAN passage to send test request to GGSN;
After a5.GGSN received test request, it was available that the WLAN channel status is set, and confirmed the foundation of WLAN passage, and returned the test request response.
12, method according to claim 1 is characterized in that: the described generic route encapsulation GRE that is encapsulated as.
13,, it is characterized in that step b further comprises according to claim 1,10 or 12 described methods:
B1. after terminal is carried out the GRE encapsulation first time to the upstream data that will send, send to AC, wherein the outer purpose IP address of packet is GGSN IP address;
B2.AC issues GGSN after the GRE encapsulation of data of receiving is carried out secondary GRE encapsulation, and wherein the destination address of GRE packet is the GGSN public ip address of configuration, and source address is the public ip address of AC;
B3.GGSN preserves AC IP address with the upstream data bag decapsulation of receiving, will issue external data network through the upstream data bag of decapsulation then.
14, method according to claim 13 is characterized in that: GGSN preserves in the upstream data bag behind the AC IP address among the step b3, further comprises: source address in the original message is replaced with GPRS IP address by WLANIP.
15, method according to claim 1 is characterized in that: described AC is BAS Broadband Access Server or is layer three switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB02124183XA CN1192565C (en) | 2002-07-16 | 2002-07-16 | Internet access method based on radio block network gateway |
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| CNB02124183XA CN1192565C (en) | 2002-07-16 | 2002-07-16 | Internet access method based on radio block network gateway |
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| CN1469604A CN1469604A (en) | 2004-01-21 |
| CN1192565C true CN1192565C (en) | 2005-03-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101252616B (en) * | 2007-02-20 | 2011-01-26 | 株式会社Ntt都科摩 | Mobile communication terminal and website browsing method |
| CN101150601B (en) * | 2007-10-17 | 2014-09-10 | 中兴通讯股份有限公司 | Multi-user concurrent access system and method |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1937632B (en) * | 2005-09-23 | 2011-05-11 | 中兴通讯股份有限公司 | Address distributing method for broadband wireless access system |
| JP4977665B2 (en) * | 2007-10-26 | 2012-07-18 | 株式会社日立製作所 | Communication system and gateway device |
| CN102238563A (en) * | 2010-04-21 | 2011-11-09 | 华为终端有限公司 | Wireless connection method and equipment |
| CN101902720B (en) * | 2010-08-27 | 2013-07-03 | 中国电信股份有限公司 | Wireless local area network charging method, system and access gateway |
| CN102638470B (en) * | 2012-04-20 | 2014-09-17 | 姜宁 | WIFI (wireless fidelity) internet surfing filtering method |
| CN103813395A (en) * | 2012-11-09 | 2014-05-21 | 中兴通讯股份有限公司 | Method for moving seamlessly among different networks by terminal user, and wireless local area network optimization gateway (WOG) |
| CN103368977A (en) * | 2013-07-31 | 2013-10-23 | 华为终端有限公司 | Network connection method and terminal equipment |
| CN106937315B (en) * | 2015-12-30 | 2020-01-17 | 中移(苏州)软件技术有限公司 | Data transmitting and receiving method and device |
-
2002
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101252616B (en) * | 2007-02-20 | 2011-01-26 | 株式会社Ntt都科摩 | Mobile communication terminal and website browsing method |
| CN101150601B (en) * | 2007-10-17 | 2014-09-10 | 中兴通讯股份有限公司 | Multi-user concurrent access system and method |
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| Publication number | Publication date |
|---|---|
| CN1469604A (en) | 2004-01-21 |
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