CN101232454B - Integration isomerization wireless network and communication method - Google Patents
Integration isomerization wireless network and communication method Download PDFInfo
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- CN101232454B CN101232454B CN2008100575357A CN200810057535A CN101232454B CN 101232454 B CN101232454 B CN 101232454B CN 2008100575357 A CN2008100575357 A CN 2008100575357A CN 200810057535 A CN200810057535 A CN 200810057535A CN 101232454 B CN101232454 B CN 101232454B
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Abstract
The invention provides a concordant heterogeneous wireless network and a communication method thereof, a Silkroad access router is positioned on the boundary of a IPv4 Internet and a IPv6 network; a home agent equipment is a wireless WAN service based on the IPv4, and positioned in the network based on the IPv6; a multi-mode mobile terminal passes through the wireless WAN based on IPv4 via a Silkroad tunnel mechanism, and establishes a tunnel with the IPv6 network; the multi-mode mobile terminal sends a corresponding route notice to a corresponding tunnel interface according to tunnel parameters, and realizes the communication with the IPv6 network. By the communication method, a MIPv6 protocol can be executed in the IPv4 wireless WAN including a network address conversion equipment or a fire wall, in order to provide an uniform seamless mobile environment and a complete MIPv6 service function for the multi-mode mobile terminal, and therefore, the link load of the wireless WAN is greatly reduced.
Description
Technical field
The present invention relates to the mobile communication technology field, more specifically, the present invention relates to a kind of heterogeneous wireless network and communication means thereof of integration.
Background technology
At present, the development of global communication technology is maked rapid progress, and development of wireless communication devices speed and application have surpassed the fixed communication technology.Along with the fast development of wireless communication technology, various cordless communication networks highlight intrinsic advantage, but wireless network develops desired covering seamless process and broadband, go back the independent network of neither one at present and can bear.Simultaneously, also the neither one network can satisfy the accessing wirelessly demand of mobile subscriber to any time, any place and any service separately, and the higher data transfer rate is provided.
Wireless wide area network (WWAN) can guarantee portable terminal any time and ubiquitous connectedness with lower data transmission rate; Long-term popularization through operators; WWAN is perfect relatively aspect network design and security control, has huge user group.Wireless lan (wlan) generally is deployed in positions such as airport, restaurant, school; Especially the WWAN signal interior of building that is difficult for penetrating; The higher data transfer rate is provided; Support real-time sound, video transmission business preferably, obtain numerous mobile subscribers' favor, but WLAN can only cover small range.Owing to there is complementarity between the various wireless networks, if various wireless networks are integrated, just can dynamically improve the adaptability of wireless data service, satisfy mobile subscriber's various demands better.
In order to realize a real seamless mobile environment, need to integrate various wireless networks, support the vertical switching of multimode mobile device, promptly mobile node (MN) can switch between heterogeneous network (based on the network of different link-layer technologies).WWAN and WLAN are incompatible on the wave point aspect, so can only form united frame with its integration on network layer.
The integrated scheme of heterogeneous wireless network mainly comprises closely integrated and loose integrated at present.
Closely integrated main thought is to let the function of wireless network 1 analog wireless networks 2, the virtual access network of wireless network 1 as wireless network 2.The outlet gateway of wireless network 1 directly connects the core network element to wireless network 2.The flow of wireless network 1 directly injects wireless network 2, not only increases the load of wireless network 2, and makes wireless network 2 become the bottleneck of whole network.The more important thing is that wireless network 2 has been exposed to wireless network 1 with its interface, therefore, need wireless network 1 and wireless network 2 to belong to same operator.In fact, in this case, the wireless network 1 of independent operation is difficult to be integrated in the wireless network 2.
Though loose integrated agency or the such network element of gateway also need in wireless network, disposed, loose integrated agency or gateway link to each other with Internet, and can directly not connect the core network element to other wireless network.Therefore, this scheme need not to revise the underlying protocol stack of any wireless network, also need not a kind of details of wireless network is exposed to the wireless network of other type.And various wireless networks can independently dispose and traffic management.Since more than many advantages, loose Integrated Solution approved widely, and the mobile IP technology loose Integrated Solution of main flow at present just.
The WWAN of operation only supports IPv4 communication on network layer at present; But,, can't satisfy the demand of numerous mobile subscribers to network insertion based on the internet address insufficient space of IPv4; Especially for the country that network demand is big, address assignment is not enough, such as China.And; Said network using network address translation (nat) technology; Make portable terminal can only obtain privately owned internetwork address based on IPv4; The mobile IPv 4 agreement requires portable terminal to have the publicly-owned internetwork address based on IPv4 again, therefore, uses the mobile IPv 4 agreement to integrate the demand for development that WWAN and WLAN are difficult to satisfy following mobile environment.
With respect to IPv4; The Internet based on IPv6 has huge address space and the good advantage of extensibility; Satisfy portable terminal and no matter be positioned at the demand that where can obtain overall unique address; Be used for many WLAN, and in the development of WeiLai Technology, possibly progressively replaced IPv4 and in WWAN, be able to implement.Simultaneously, the Internet of international organization engineering duty group (IETF) has proposed mobile IP v 6 (MIPv6) technology (RFC3775) again, supports the mobility problem of the Internet to a certain extent, makes MIPv6 become a kind of scheme of integrating various WWAN and WLAN.But the MIPv6 agreement of standard does not consider that but access network do not support the situation of IPv6.
Do not support IPv6 and intention to adopt the integrated isomerous wireless network of MIPv6 contradiction between the two in order to solve WWAN, tunneling technique becomes a kind of solution that widely adopts at present.Tunneling technique (Tunneling) is a kind of mode of passing through infrastructure Data transmission between network of internet usage network.The data (or load) of using the tunnel to transmit can be the Frame or the bag of different agreement.Tunnel protocol sends the Frame or the bag encapsulation again of other agreement then through the tunnel.New frame head (packet header) provides routing iinformation, so that transmit packed load data through the Internet.Therefore, tunneling technique is contained in the IPv6 data envelope in the load of IPv4 packet, utilizes that existing IPv4 routing architecture transmits among the WWAN, solves the portable terminal that inserts WWAN and the problem of IPv6 enabling communication between nodes.
But; Domestic WWAN does not only support IPv6 at present, and because the IPv4 address resource is not enough, some WWAN (like GPRS network) has adopted the NAT technology; Make portable terminal can only be assigned to private ip v4 address; And other WWAN (like cdma network) also in view of the consideration of factors such as safety, are provided with fire compartment wall at Web portal even for portable terminal has distributed publicly-owned IPv4 address.These NAT device and fire compartment wall do not allow the 6-in-4 packet to pass through, and cause the 6-in-4 tunneling technique can't support the portable terminal of WWAN such as GPRS, CDMA to communicate by letter with other IPv6 are internodal.
Summary of the invention
For overcome in the prior art comprise NAT device or fire compartment wall based on the wireless network of IPv4 in multi-module mobile terminal can't realize the vertical defective of switching, the present invention provides a kind of heterogeneous wireless network and communication means thereof of integration.
According to an aspect of the present invention, a kind of heterogeneous wireless network of integration is provided, has comprised:
Based on the wireless wide area network of IPv4, network, Silkroad couple in router and home agent equipment based on IPv6;
Said wireless wide area network based on IPv4 has network address translation apparatus or fire compartment wall; Said Silkroad couple in router is positioned on IPv4 Internet and the border based on the network of IPv6; Said home agent equipment is the wireless wide area network service based on IPv4, is arranged in the network based on IPv6;
Multi-module mobile terminal is through the Silkroad tunneling mechanism, utilizes said Silkroad couple in router to pass through the wireless wide area network based on IPv4 of network address translation apparatus or fire compartment wall, sets up and tunnel based on the network of IPv6; Multi-module mobile terminal sends corresponding advertising of route according to parameters for tunnel from the corresponding tunnel interface of trend, realizes and communicating by letter based on the network of IPv6.
Wherein, When said multi-module mobile terminal cuts out or during said multi-module mobile terminal switchback wireless wide area network from wireless wide area network; Said home agent equipment sends redirect request to said Silkroad couple in router, and the flow direction to the packet of said multi-module mobile terminal is sent out in decision.
Wherein, preferably, be deployed on same the main frame for the home agent equipment of wireless wide area network service and said Silkroad couple in router said.
Wherein, the IPv6 address prefix of said home agent equipment and the Silkroad couple in router IPv6 address prefix of distributing to the multi-module mobile terminal in the wireless wide area network is identical.
Wherein, said multi-module mobile terminal is supported among the MIPv6 Silkroad client in the mobile node and Silkroad tunneling mechanism simultaneously.
According to a second aspect of the invention, a kind of method of integrated isomerous wireless network is provided, has comprised:
Step 10), dispose the heterogeneous wireless network topological structure,, in network, be deployed as home agent based on the wireless wide area network service of IPv4 based on IPv6 at IPv4 Internet and border deploy Silkroad couple in router based on the network of IPv6;
Step 20), multi-module mobile terminal utilizes the Silkroad tunneling mechanism, passes through the wireless wide area network based on IPv4 of network address translation apparatus or fire compartment wall, set up and tunnel based on the network of IPv6;
Step 30), said multi-module mobile terminal sends corresponding advertising of route according to parameters for tunnel from the corresponding tunnel interface of trend, realize and communicating by letter based on the network of IPv6.
Wherein, in the step 10), preferably, be deployed on same the main frame for the home agent of wireless wide area network service and said Silkroad couple in router said.
Wherein, the IPv6 address prefix of said home agent and the Silkroad couple in router IPv6 address prefix of distributing to the multi-module mobile terminal in the wireless wide area network is identical.
Wherein, said multi-module mobile terminal is supported among the MIPv6 Silkroad client in the mobile node and Silkroad tunneling mechanism simultaneously.
Wherein, step 20) further comprise:
Step 210), when said multi-module mobile terminal when wireless wide area network inserts, after said multi-module mobile terminal obtains the publicly-owned IPv4 address of Silkroad couple in router, send the Address requests message that comprises parameters for tunnel to the Silkroad couple in router;
Step 220), the Silkroad couple in router is according to said Address requests message; Be that said multi-module mobile terminal is set up corresponding IPv6-in-UDP-in-IPv4 tunnel interface on said Silkroad couple in router; And be said multi-module mobile terminal structure IPv6 address, return to said multi-module mobile terminal as response message;
Step 230), after said multi-module mobile terminal is received said response message; Extract said IPv6 address; Configuration of IP v6-in-UDP-in-IPv4 tunnel interface is set up the IPv6-in-UDP-in-IPv4 tunnel between said multi-module mobile terminal and the said Silkroad couple in router.
Wherein, step 220) further comprise: on said Silkroad couple in router, dispose corresponding routing rule, make the IPv6 route of said multi-module mobile terminal point to said tunnel interface for said multi-module mobile terminal.
Wherein, step 220) in, the Silkroad couple in router is according to the parameters for tunnel structure IPv6 address that extracts in the said Address requests message.
According to a third aspect of the invention we, a kind of method of integrated isomerous wireless network is provided, has comprised:
Step 40), cut out or during said multi-module mobile terminal switchback wireless wide area network from wireless wide area network when said multi-module mobile terminal; The home agent of serving for wireless wide area network sends redirect request to the Silkroad couple in router, and the flow direction to the packet of said multi-module mobile terminal is sent out in decision.
Wherein, step 40) further comprise:
Step 410), when said multi-module mobile terminal when wireless wide area network cuts out, send binding update messages to the home agent of said wireless wide area network and bind to set up;
Step 420), after said home agent receives said binding update messages, send redirect request to the Silkroad couple in router, notify the said multi-module mobile terminal of said Silkroad couple in router to cut out from said wireless wide area network;
Step 430), after said Silkroad couple in router receives redirect request, the IPv6 address of pointing to said home agent to the route of said multi-module mobile terminal.
Wherein, step 420) in, when said multi-module mobile terminal when said wireless wide area network cuts out, said multi-module mobile terminal does not re-use Silkroad tunnel transceive data bag.
Wherein, step 420) in, said redirect request comprises back 64 interface identifier and the flag bit of representing that said multi-module mobile terminal cuts out from said wireless wide area network of said multi-module mobile terminal home address.
Wherein, step 420) in, when said multi-module mobile terminal vertically switches as home network with the wireless network based on IPv6, for the Silkroad couple in router of wireless wide area network service is equivalent to nonlocal couple in router.
Wherein, step 40) further comprise:
Step 410), when wireless wide area network is got back in the multi-module mobile terminal switching, to the home agent transmission binding update messages cancellation binding of said wireless wide area network;
Step 420), after said home agent receives said binding update messages; Send redirect message to the Silkroad couple in router; The said multi-module mobile terminal of notice Silkroad couple in router switches back wireless wide area network, need reuse Silkroad tunnel transceive data bag;
Step 430), after said Silkroad couple in router receives said redirect message, point to the Silkroad tunnel interface corresponding again to the route of said multi-module mobile terminal with said multi-module mobile terminal.
Wherein, step 420) in, said redirect request comprises back 64 interface identifier of said multi-module mobile terminal home address and the flag bit of the said wireless wide area network of the said multi-module mobile terminal switchback of expression.
The present invention is based on Silkroad tunnel access technology,, be embodied as the function that WWAN user provides complete MIPv6 service through the Silkroad couple in router is combined with home agent among the MIPv6; Integrate WLAN and NAT device and fire compartment wall are arranged at interior various WWAN; Successfully dispose home agent for the WWAN terminal; Form unified seamless mobile environment; For the vertical switching of multi-module mobile terminal provides complete MIPv6 service function,, significantly reduce the link load of WWAN simultaneously through the method for the spontaneous advertising of route of portable terminal.
Description of drawings
Fig. 1 is the topological diagram of the heterogeneous network of integration of the prior art;
Fig. 2 is the topological diagram according to the heterogeneous network of integration of the present invention;
Fig. 3 be multi-module mobile terminal from the WWAN based on IPv4 insert, with the procedure chart of Silkroad tunneling mechanism and IPv6 network interworking;
The procedure chart that Fig. 4 vertically switches as home network with the wireless network based on IPv6 for multi-module mobile terminal;
The procedure chart that Fig. 5 vertically switches as home network with the WWAN based on IPv4 for multi-module mobile terminal.
Embodiment
Further describe below in conjunction with accompanying drawing and specific embodiment heterogeneous wireless network and communication means thereof a kind of integration provided by the invention.
Two kinds of penetrating NAT equipment that exist at present realize that the tunneling mechanism of IPv6 terminal interconnect comprises: Teredo (RFC 4380) and Silkroad (draft-liumin-v6ops-silkroad-03); These two kinds of tunneling mechanisms can make the two stack main frames of the IPv6/IPv4 that is positioned at behind the NAT can use the privately owned address of IPv4 of oneself; Pass through the IPv4 network and other IPv6 main frame connects.
The Teredo tunneling mechanism can be passed through all the NAT types except that symmetrical NAT (Symmetric NAT), and still, it can only distribute temporary transient IPv6 address for NAT user.Be embedded with the IPv4 address of Teredo server in the IPv6 address of Teredo, and IPv4 address and port after the client mapping.So its IPv6 address can change with the change of embedded IPv4 address and port.Yet IPv4 address assignment and mapping among the WWAN are dynamic assignment.Because the IPv6 address that the Teredo tunneling mechanism can not guarantee that portable terminal is each to be obtained when inserting same WWAN is identical, therefore uses the Teredo tunneling mechanism to be difficult to various WWAN are integrated into a unified heterogeneous wireless environment.
The Silkroad tunneling mechanism can be distributed temporary transient or fixing IPv6 address for NAT user, and supports existing whole NAT type.Therefore, utilize the Silkroad tunneling mechanism can various WWAN be incorporated in the unified heterogeneous wireless network environment.Silkroad mechanism relates generally to three entities, is respectively Silkroad client (SC), Silkroad couple in router (SAR) and Silkroad omniselector (SN).SC is the IPv6/IPv4 dual stack node that is positioned at the NAT territory, supports the Silkroad tunnel interface, can set up IPv6 with other SC or other node on the IPv6 Internet through the Silkroad agreement and communicate by letter.SAR can set up the IPv6 connection with helping SC through the IPv6/IPv4 dual-stacker router of publicly-owned IPv4 accessed IPv4 the Internet.SN is with the node of helping the mutual route of Silkroad couple in router.The process that SC inserts the IPv6 network is following: in order to obtain the address of SAR, SC at first sends the request of access to SN; SN specifies a suitable SAR according to dispatching algorithm for the user, returns its publicly-owned IPv4 address; SC sends the Address requests message to the SAR of appointment then; SAR extracts parameters for tunnel and preserves from request message, construct an IPv6 address, returns to SC as response message; SC receives that extracting the IPv6 address behind the response message is configured, and the IPv6-in-UDP-in-IPv4 tunnel between foundation and the SAR, accomplishes initialization procedure.After this, SC just can communicate with other IPv6 nodes.
At present; The prior art of integrated isomerous wireless network (for example WLAN and based on the WWAN of IPv4) is that tunneling mechanism and MIPv6 agreement are carried out amalgamation simply; Select for use the Silkroad tunneling mechanism to pass through the WWAN that contains NAT or fire compartment wall; Its network design is disposed home agent (HA) referring to Fig. 1 in each WLAN, the couple in router (AR) general and WLAN of the HA among the WLAN is deployed in together.The deploy SAR on the border of IPv4 Internet and IPv6 network.Portable terminal and SAR set up the IPv6-in-UDP-in-IPv4 tunnel, and SAR periodically sends advertising of route (RA) to portable terminal through this tunnel.
But there is following defective in this technical scheme: (1) according to the MIPv6 agreement, RA is the foundation that network layer moves detection.Every at a distance from 30 milliseconds to 70 milliseconds, couple in router needs all portable terminals in compass of competency to send RA.For the lower wireless wide area network of data transmission rate (like networks such as GPRS, CDMA), so frequent RA sends will increase the link load of WWAN, even take the network bandwidth of the overwhelming majority; (2) existing scheme can only be deployed in HA in the wireless network of supporting IPv6, and can only be as field network based on the WWAN of IPv4, and this makes the portable terminal that at first inserts from IPv4 WWAN can't enjoy the mobile management service.
In an embodiment according to the present invention, the deploy SAR on the border of IPv4 Internet and IPv6 network is deployed as the HA based on the WWAN service of IPv4 in the IPv6 network.In order to reduce unnecessary routing procedure, preferably be deployed in HA and SAR on same the main frame, and the IPv6 address prefix of this HA should to distribute to the IPv6 address prefix of portable terminal among the WWAN identical with SAR for WWAN service.In each WLAN, dispose HA, likewise, the HA among the WLAN also can be deployed in together with the couple in router (AR) of WLAN.
As shown in Figure 2, select for use GPRS network and cdma network to represent two kinds of WWAN of NAT device and fire compartment wall respectively in the present embodiment.Being deployed in for the HA of GPRS network service and SAR1 on the two stack main frames that are positioned at IPv4 Internet and IPv6 network intersection, the IPv6 address prefix of this main frame should to distribute to the IPv6 address prefix at GPRS terminal identical with SAR1; Being deployed in for the HA of cdma network service and SAR2 on another two stack main frames that are positioned at IPv4 Internet and IPv6 network intersection, the IPv6 address prefix of this main frame should to distribute to the IPv6 address prefix at CDMA terminal identical with SAR2; In each WLAN that needs are integrated, be deployed in HA with the AR that links to each other with AP.
In the present embodiment, require multi-module mobile terminal to have to support simultaneously the function of SC in mobile node among the MIPv6 (MN) and the Silkroad tunneling mechanism.
As shown in Figure 3, multi-module mobile terminal is realized intercommunication through WWAN and IPv6 network based on IPv4.
1-1, when multi-module mobile terminal when WWAN inserts, in order to obtain the address of SAR, multi-module mobile terminal at first sends the request of access through corresponding M odem interface to SN;
1-2, SN are that portable terminal is specified a suitable SAR according to dispatching algorithm, return the access response of the publicly-owned IPv4 address that has SAR;
After 1-3, portable terminal will comprise Address requests message use UDP (UDP) encapsulation of parameters for tunnel; Send out to SAR through the IPv4 network from corresponding M odem interface; Wherein, Parameters for tunnel mainly comprises the IPv4 address and the udp port of portable terminal, if through NAT mapping, then parameters for tunnel mainly comprises publicly-owned IPv4 address and the port after the mapping;
1-4, SAR extract parameters for tunnel and preserve from request message; Then according to the parameters for tunnel of preserving; On SAR, set up corresponding IPv6-in-UDP-in-IPv4 tunnel interface for this portable terminal; And dispose corresponding routing rule, make the IPv6 route of portable terminal point to this tunnel interface;
1-5, for complete IPv6 address of portable terminal structure, be placed in the response message, and return to portable terminal through the IPv4 network with UDP encapsulation back;
After 1-6, portable terminal are received response message, extract the IPv6 address, configuration of IP v6-in-UDP-in-IPv4 tunnel interface and corresponding routing rule on this portable terminal are so set up the IPv6-in-UDP-in-IPv4 tunnel between portable terminal and the SAR.
1-7, portable terminal can send corresponding advertising of route (RA) from the tunnel interface of trend oneself according to parameters for tunnel (IPv6 link-local (linklocal) address of IPv6 network prefix, SAR etc.).
After above initialization procedure is accomplished; Portable terminal just can communicate through WWAN and other IPv6 nodes, and portable terminal is when each initial WWAN that inserts based on IPv4, or before the WWAN that switches to based on IPv4; All need carry out above step; Easy in order to explain below, in describing the vertical process of switching, no longer reaffirm above step.
In the present embodiment, when multi-module mobile terminal vertically switched as home network with the IPv6 wireless network, the SAR that serves for WWAN is equivalent to nonlocal couple in router (FAR), and was as shown in Figure 4, the similar process described in handoff procedure and the MIPv6:
2-1, when multi-module mobile terminal when the IPv6 wireless network switches to the WWAN based on IPv4, after initialization is accomplished, send BU to set up or to upgrade binding to HA for the WWAN service, BU is routed to HA through SAR;
2-2, after HA receives BU, set up or upgrade corresponding the binding, and return corresponding binding acknowledgement message (BA) to portable terminal, BA is transmitted to this portable terminal through SAR; After accomplishing vertical the switching, portable terminal is from the WWAN transceive data bag based on IPv4;
2-3, if multi-module mobile terminal when the WWAN based on IPv4 switches to other based on the WWAN of IPv4, after in new WWAN, reinitializing, sends BU to its HA and binds to upgrade, BU is routed to HA through the SAR for new WWAN service;
2-4, after HA receives BU, upgrade accordingly and bind, and return corresponding BA to portable terminal, BA is transmitted to this portable terminal through the SAR for new WWAN service, accomplish vertical the switching after, portable terminal is from new WWAN transceive data bag;
2-5, if multi-module mobile terminal is when the WWAN based on IPv4 switches to IPv6 other places wireless network or home network; Portable terminal sends BU to its HA and binds or nullify and bind to upgrade; And receive the BA that returns after HA handles BU; After accomplishing vertical the switching, portable terminal is from the IPv6 wireless network transceive data bag at place;
For the WWAN that gives to have NAT or fire compartment wall provides the mobility support after the vertical switching as the multi-module mobile terminal of home network; The present invention improves the HA function of stipulating among SAR function described in the draft-liumin-v6ops-silkroad-03 and the MIPv6, increases the interactive function between HA and the SAR.When multi-module mobile terminal when the local WWAN based on IPv4 cuts out, it sends binding update messages (BU) to the HA of WWAN and binds to set up.After HA receives BU, know that this portable terminal will cut out local WWAN.So HA sends redirect request to SAR, certain portable terminal of notice SAR cuts out from WWAN, does not re-use Silkroad tunnel transceive data bag.After SAR receives redirect request, no longer point to the Silkroad tunnel interface corresponding to route, but point to the IPv6 address of HA to this portable terminal with it.When multi-module mobile terminal switched the local WWAN get back to based on IPv4, it sent BU to its HA and binds to nullify.After HA receives BU, know that this portable terminal will switch among the WWAN that goes back home.So HA sends redirect message once more to SAR, certain portable terminal of notice SAR switches back WWAN, need reuse Silkroad tunnel transceive data bag.After SAR receives redirect message,, but point to the Silkroad tunnel interface corresponding again with this portable terminal no longer the IPv6 address of pointing to its HA to the route of this portable terminal.
In the present embodiment, when multi-module mobile terminal vertically switched as home network with the WWAN based on IPv4, as shown in Figure 5, step was following:
3-1, when multi-module mobile terminal when WWAN switches to other network (comprise IPv6 wireless network with other based on the WWAN of IPv4 etc.) from the local, portable terminal sends BU to its HA and binds to set up;
3-2, after HA receives BU; Can learn that this portable terminal will switch in other network and go, so HA sends redirect request to local SAR; Certain portable terminal of notice local SAR cuts out from the WWAN of local, does not re-use IPv6-in-UDP-in-IPv4 tunnel transceive data bag; Wherein redirect request comprises back 64 interface identifier and the expression portable terminal flag bit that WWAN cuts out from the local of portable terminal home address (HoA), and this sign is set to 1;
3-3, after local SAR receives redirect request, no longer pointing to the IPv6-in-UDP-in-IPv4 tunnel interface corresponding, but the IPv6 address of sensing HA with it to the route of this portable terminal; Afterwards, local SAR returns to HA with the success or failure situation of redirection of router through " be redirected and confirm " message, comprises redirected Status Flag in " be redirected and confirm ", if success then puts 0, if failure then puts 1;
3-4, after HA receives " be redirected confirm ", according to redirected success or failure, whether decision is that MN sets up or upgrades corresponding binding, and returns corresponding BA to portable terminal;
3-5, when portable terminal when switching between the IPv6 wireless network or between IPv6 wireless network and nonlocal WWAN based on IPv4, with the similar process described in the MIPv6, portable terminal sends BU to its HA, and receives the BA that returns after HA handles BU; If objective network is based on the nonlocal WWAN of IPv4, need before this step on new WWAN, to reinitialize earlier;
3-6, switch when coming back to hometown WWAN from the IPv6 wireless network or based on the nonlocal WWAN of IPv4 when multi-module mobile terminal, after reinitializing, said terminal is sent BU to its HA and is bound to nullify;
3-7, after HA receives BU; Can learn that this portable terminal will switch back to local WWAN, so HA sends redirect request once more to local SAR; Certain portable terminal of notice local SAR has switched back to local WWAN; Need reuse IPv6-in-UDP-in-IPv4 tunnel transceive data bag, wherein redirect request comprises back 64 interface identifier of portable terminal HoA and the flag bit of expression portable terminal switchback local WWAN, and should indicate that removing was 0;
3-8, after local SAR receives redirect request; No longer the IPv6 address of pointing to its HA to the route of this portable terminal; But point to the IPv6-in-UDP-in-IPv4 tunnel interface corresponding again with this portable terminal; Afterwards, local SAR returns to HA through " be redirected and confirm " message once more with the success or failure situation of redirection of router;
3-9, after HA receives " be redirected confirm ", according to redirected success or failure, whether decision is that MN nullifies corresponding binding, and return corresponding BA to portable terminal.
What should explain at last is; Above embodiment is only in order to explain technical scheme of the present invention and to be not limited thereto; But on using, can extend to other modification, variation, application and embodiment, and therefore think that all such modifications, variation, application, embodiment are within the spirit and scope of the present invention.
Claims (17)
1. the heterogeneous wireless network of an integration comprises:
Based on the wireless wide area network of IPv4, network, Silkroad couple in router and home agent equipment based on IPv6;
Said wireless wide area network based on IPv4 has network address translation apparatus or fire compartment wall; Said Silkroad couple in router is positioned on IPv4 Internet and the border based on the network of IPv6; Said home agent equipment is the wireless wide area network service based on IPv4, is arranged in the network based on IPv6;
Multi-module mobile terminal is through the Silkroad tunneling mechanism, utilizes said Silkroad couple in router to pass through the wireless wide area network based on IPv4 of network address translation apparatus or fire compartment wall, sets up and tunnel based on the network of IPv6; Multi-module mobile terminal sends corresponding advertising of route according to parameters for tunnel from the corresponding tunnel interface of trend, realize with based on the communicating by letter of the network of IPv6,
Wherein, When said multi-module mobile terminal cuts out or during said multi-module mobile terminal switchback wireless wide area network from wireless wide area network; Said home agent equipment sends redirect request to said Silkroad couple in router, and the flow direction to the packet of said multi-module mobile terminal is sent out in decision.
2. the heterogeneous wireless network of the said integration of claim 1 wherein, is deployed on same the main frame for the home agent equipment of wireless wide area network service and said Silkroad couple in router said.
3. the heterogeneous wireless network of the said integration of claim 1, wherein, the IPv6 address prefix of said home agent equipment is identical with the IPv6 address prefix that the Silkroad couple in router is distributed to the multi-module mobile terminal in the wireless wide area network.
4. the heterogeneous wireless network of the said integration of claim 1, wherein, said multi-module mobile terminal is supported among the MIPv6 Silkroad client in the mobile node and Silkroad tunneling mechanism simultaneously.
5. the method for an integrated isomerous wireless network comprises:
Step 10), dispose the heterogeneous wireless network topological structure,, in network, be deployed as home agent based on the wireless wide area network service of IPv4 based on IPv6 at IPv4 Internet and border deploy Silkroad couple in router based on the network of IPv6;
Step 20), multi-module mobile terminal utilizes the Silkroad tunneling mechanism, passes through the wireless wide area network based on IPv4 of network address translation apparatus or fire compartment wall, set up and tunnel based on the network of IPv6;
Step 30), said multi-module mobile terminal sends corresponding advertising of route according to parameters for tunnel from the corresponding tunnel interface of trend, realize and communicating by letter based on the network of IPv6;
Step 40), cut out or during said multi-module mobile terminal switchback wireless wide area network from wireless wide area network when said multi-module mobile terminal; The home agent of serving for wireless wide area network sends redirect request to the Silkroad couple in router, and the flow direction to the packet of said multi-module mobile terminal is sent out in decision.
6. the described method of claim 5 wherein, in the step 10), is deployed on same the main frame for the home agent of wireless wide area network service and said Silkroad couple in router said.
7. the described method of claim 5, wherein, the IPv6 address prefix of said home agent is identical with the IPv6 address prefix that the Silkroad couple in router is distributed to the multi-module mobile terminal in the wireless wide area network.
8. the described method of claim 5, wherein, said multi-module mobile terminal is supported among the MIPv6 Silkroad client in the mobile node and Silkroad tunneling mechanism simultaneously.
9. the described method of claim 5, wherein, step 20) further comprise:
Step 210), when said multi-module mobile terminal when wireless wide area network inserts, after said multi-module mobile terminal obtains the publicly-owned IPv4 address of Silkroad couple in router, send the Address requests message that comprises parameters for tunnel to the Silkroad couple in router;
Step 220), the Silkroad couple in router is according to said Address requests message; Be that said multi-module mobile terminal is set up corresponding IPv6-in-UDP-in-IPv4 tunnel interface on said Silkroad couple in router; And be said multi-module mobile terminal structure IPv6 address, return to said multi-module mobile terminal as response message;
Step 230), after said multi-module mobile terminal is received said response message; Extract said IPv6 address; Configuration of IP v6-in-UDP-in-IPv4 tunnel interface is set up the IPv6-in-UDP-in-IPv4 tunnel between said multi-module mobile terminal and the said Silkroad couple in router.
10. the described method of claim 9, wherein, step 220) further comprise: on said Silkroad couple in router, dispose corresponding routing rule, make the IPv6 route of said multi-module mobile terminal point to said tunnel interface for said multi-module mobile terminal.
11. the described method of claim 9, wherein, step 220) in, the Silkroad couple in router is according to the parameters for tunnel structure IPv6 address that extracts in the said Address requests message.
12. the described method of claim 5, wherein, step 40) further comprise:
Step 410), when said multi-module mobile terminal when wireless wide area network cuts out, send binding update messages to the home agent of said wireless wide area network and bind to set up;
Step 420), after said home agent receives said binding update messages, send redirect request to the Silkroad couple in router, notify the said multi-module mobile terminal of said Silkroad couple in router to cut out from said wireless wide area network;
Step 430), after said Silkroad couple in router receives redirect request, the IPv6 address of pointing to said home agent to the route of said multi-module mobile terminal.
13. the described method of claim 5, wherein, step 40) further comprise:
Step 410), switch when getting back to wireless wide area network when multi-module mobile terminal, sending binding update messages to the home agent of said wireless wide area network binds to nullify;
Step 420), after said home agent receives said binding update messages; Send redirect message to the Silkroad couple in router; The said multi-module mobile terminal of notice Silkroad couple in router switches back wireless wide area network, need reuse Silkroad tunnel transceive data bag;
Step 430), after said Silkroad couple in router receives said redirect message, point to the Silkroad tunnel interface corresponding again to the route of said multi-module mobile terminal with said multi-module mobile terminal.
14. the described method of claim 12, wherein, step 420) in, when said multi-module mobile terminal when said wireless wide area network cuts out, said multi-module mobile terminal does not re-use Silkroad tunnel transceive data bag.
15. the described method of claim 12, wherein, step 420) in, said redirect request comprises back 64 interface identifier and the flag bit of representing that said multi-module mobile terminal cuts out from said wireless wide area network of said multi-module mobile terminal home address.
16. the described method of claim 12; Wherein, Step 420) in, when said multi-module mobile terminal vertically switches as home network with the wireless network based on IPv6, for the Silkroad couple in router of wireless wide area network service is equivalent to nonlocal couple in router.
17. the described method of claim 13, wherein, step 420) in, said redirect request comprises back 64 interface identifier of said multi-module mobile terminal home address and the flag bit of the said wireless wide area network of the said multi-module mobile terminal switchback of expression.
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| CN102300241B (en) * | 2010-06-23 | 2014-11-05 | 中兴通讯股份有限公司 | Base station performance measurement method and device |
| CN102075519A (en) * | 2010-12-10 | 2011-05-25 | 谭中飞 | Network layer protocol capable of replacing IPv6 |
| US10104540B2 (en) | 2013-01-23 | 2018-10-16 | Qualcomm Incorporated | Determining to use multi-RAN interworking by correlating different RAN identifiers |
| CN103441933A (en) * | 2013-07-22 | 2013-12-11 | 汉柏科技有限公司 | Method for achieving communication between IPV4 device and IPV6 device |
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