CN100452764C - Mobile router device, mobile network system, and mobile management method of mobile router device - Google Patents
Mobile router device, mobile network system, and mobile management method of mobile router device Download PDFInfo
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Abstract
A mobile router device connects a mobile network containing several terminal devices and moving in a backbone network with the backbone network. The mobile router device includes: means for deciding whether to operate as a master router which is a router for actually connecting the mobile network with the backbone network; means for recording a virtual address as an address common to the mobile router devices belonging to the mobile network and generating for this virtual address, a care-of address which is an address that the mobile router can use at the moving destination; and means for generating and transmitting a binding update message for correlating the virtual address to the care-of address when the mobile router device operates as the master router.
Description
Technical field
The present invention relates to a kind ofly to hold one or more terminal installations, be displaced in the underlying network and with the mobile router device that underlying network is connected with terminal installation, contain the mobile network system of mobile router device and terminal installation.
Background technology
Be displaced into one of communication means of the terminal installation in the Internet system, for example, rugged great, " Details say figure separate IPv6 エ キ ス パ one ト ガ イ De " the elegant and シ ス テ system publication of closing that Gu Yongsi, lucky rattan wisdom, Shi Yuan know that the ocean shown in river is arranged, the Mobile IPv6 (MobileInternet Protocol Version 6) that on May 25th, 2002 was put down in writing in p.96-99.According to this agreement, even terminal installation also can communicate with same address under situation about moving between different networks.
In Mobile IPv6, terminal installation, under situation away from the home link that is connecting in the place that should be positioned at originally (home link), by obtain prefix (prefix) information with the present link that just is being connected from the router advertisement message (advertise message) that sends by the access router of the present link that is connecting, home address (home address) and above-mentioned prefix information by as original address are created on the Care-of Address (care of address) that can temporarily use in this link.
Then, by sending Binding Update (binding updata) message, this Care-of Address as main Care-of Address (primary care of address), is logined the home agent on the home link of terminal installation to home agent (home agent).Home agent behind the binding update messages that receives from terminal installation, generates or upgrades related banding cache (bindingcache) between clear and definite home address and the Care-of Address.
Home agent is with reference to banding cache, and the agency receives the packet that the home address on the home link of terminal installation sends.Home agent encapsulates (capsule) with the packet that the agency receives, and shifts to the Care-of Address of terminal installation.Terminal installation carries out the encapsulation of the packet that is sent to and removes by home agent, and accepts to give the packet of the home address of terminal installation.
Mobile IPv6, be that the supposition terminal installation moves, rather than suppose the mobile network that a certain network integral body is moved between different networks as a unit, this network integral body, so, under these circumstances, terminal installation must carry out processing as described above respectively.
In addition, open among the flat 9-172451 the spy, as the communication means that is moved the terminal installation that network holds, publicity below content.Except with moving IP (Internet Protocol) address changes, promptly be equivalent to the address of Care-of Address, even also router is given in different networks mobile also indeclinable VIP (Virtual IP) address, is home address.Home agent is with reference to the related address administration table (AMT:Address Mapping Table) that is used between clear and definite VIP address and the IP address, to IP address transfer data packets.Below, be called the VIP mode.
In the VIP mode, specific mobile router device holds terminal installation, mails to the packet of terminal installation, and by the home agent of management AMT, the IP address transfer data packets to above-mentioned specific mobile router can communicate.Owing to there is no need to implement to follow mobile processing in the terminal installation in the mobile network, so the simple of change compared in the processing when mobile with Mobile IPv6.
Yet, in above-mentioned VIP mode, the occasion of change has taken place in the specific mobile router device of the terminal installation in holding the mobile network, in each terminal installation, just need follow mobile processing.
Promptly, mobile router device on a plurality of mobile networks that become access router on the internet and the tie point between mobile network is set, fault is arranged or lost under internuncial situation with the internet at the mobile router device that uses so far, when using other mobile router devices, break annexation with specific mobile router device and terminal installation, terminal installation moves to the subordinate of other mobile routers from the mobile router of present use.Therefore, each terminal installation must belong to the related processing that is used between clear and definite home address and the Care-of Address to home agent.Thus, network load increases, simultaneously, because all terminal installations can not carry out the login process of physical address simultaneously, so, situation about differing widely with regard to the concluding time that has the physical address login process according to the terminal installation difference.
Summary of the invention
The invention provides a kind of management method of mobile of such mobile network system, mobile router device and mobile router device: the mobile network who is being used for moving between a plurality of accesses network that link to each other with underlying network, in the mobile network, be provided with the occasion of the mobile router device of a plurality of connection mobile networks and accesses network, under the situation of the load that does not increase network, realize the change of the mobile router device of use.
For this reason, mobile router device of the present invention, it holds one or more terminal installations, and connect by first access router in a plurality of access router and to be positioned at the mobile network of primary importance and underlying network with a plurality of access router, described mobile network has by moving to the second place and being connected to second access router in a plurality of access router and moving in underlying network: decision is used for the unit whether mobile router device of actual connection mobile network and underlying network moves as active router; Record belong to the mobile network who is positioned at first and second positions mobile router device common virtual address, for this virtual address, the generation mobile router device is in the unit of the utilizable Care-of Address of the second place; And under the situation that mobile router device moves as active router, generate and send the unit that makes the virtual address binding update messages corresponding with Care-of Address; Under the situation of moving, has the structure that sends binding update messages as active router; Wherein, the mobile network further comprises the alternate routing apparatus, if the alternate routing apparatus is determined to have lost between the mobile router device and first access router and being connected of underlying network, the alternate routing apparatus sends another binding update messages, and described another binding update messages comprises corresponding to the virtual address of this mobile router device with corresponding to the Care-of Address of alternate routing apparatus.
According to this structure, even under the situation of the router apparatus that change is used in the mobile network, also there is no need to send the mobile router device that is used in advance using and belong at binding update messages positional information, that be used to eliminate the old information in the banding cache of home agent management mobile router device.Have only the actual mobile router device that is connected with the internet of carrying out, only carry out handling by using same virtual address, so can continue communicating by letter of terminal installation in the mobile network and the terminal installation that becomes communication object to the Binding Update of home network.
In addition, in the home agent in home network, move the corresponding home address of Care-of Address of destination with the expression mobile router device since irrelevant with the change of mobile router device be unique, so the setting change in the path that just do not need to provide and deliver.
In addition, mobile router device of the present invention has following structure: virtual address, and for being assigned to any one real address of each mobile router device of belonging to the mobile network.According to this structure, owing to there is no need to give again common address, so can realize the saving of address space.In addition, even, also can move as mobile router device according to virtual address for the mobile router device that does not distribute the address in advance.
In addition, mobile router device of the present invention has: the unit that monitors the link quality that is connected with underlying network; The unit that is used to determine the relative importance value of active router and standby router according to link quality change; With decide mobile router device whether as the unit of active router action according to relative importance value.According to this structure, owing to can will move as active router, so even also can carry out high-quality communication when mobile with the mobile router device that is connected performance optimal of underlying network.
In addition, mobile router device of the present invention, have: under the situation that mobile router device moves as active router, be the serial number of the described binding update messages of storage in the active router advertisement packets of active router and the unit that sends described active router advertisement packets at the notice mobile router device.
According to this structure, a plurality of mobile router devices are set in the mobile network, even the mobile router device that Binding Update is handled is carried out in change in home agent, also can continue to receive up-to-date serial number and carry out the Binding Update processing, contain up-to-date information so can guarantee message, and can prevent that home agent is judged as old information with above-mentioned information and discards.
In addition, mobile router device of the present invention, have: under the situation that mobile router device moves as standby router, the unit of the active router advertisement packets that reception is sent by another mobile router device, described active router advertisement packets with described another mobile router device as the described mobile router device of the message informing of active router work; The serial number that is recorded in the binding update messages that the active router advertisement packets that receives contains is to use the unit of described serial number when mobile router device self becomes active router.According to this structure, a plurality of mobile router devices are set in the mobile network, even the mobile router device that Binding Update is handled is carried out in change in home agent, also can continue to receive up-to-date serial number and carry out the Binding Update processing, contain up-to-date information so can guarantee message, and can prevent that home agent is judged as old information with above-mentioned information and discards.
In addition, mobile router device of the present invention has: the active router advertisement packets, and according to the structure of Virtual Router Redundancy Protocol use virtual router advertisement.According to this structure, in each mobile router device that uses the virtual redundancy agreement,, send new message so can prevent mobile router device owing to notify up-to-date serial number to other router apparatus.Therefore, can prevent to be sent to the increase of the message number in the mobile network.
In addition, mobile router device of the present invention has: active router advertisement packets, the structure of use IPv6 router advertisement message.According to this structure, in mobile router device,, send new message so can prevent mobile router device owing to notify up-to-date serial number to other router apparatus as the router apparatus action.Therefore, can prevent the increase of the message number in being sent to the mobile network.
In addition, mobile network system of the present invention has: a plurality of mobile router devices; At least one is housed in the terminal installation of above-mentioned mobile router device; Manage the home agent apparatus that moves of above-mentioned mobile router device.According to this structure, even can not be connected with underlying network at a mobile router device, and other router apparatus are can be connected with underlying network the time, do not appending under the situation of new processing capacity to terminal or home agent apparatus, also can replace and use the mobile router device that utilizes, continue communication.
In addition, mobile network system of the present invention constitutes: the underlying network physical interface classification of at least one mobile router device is different with the underlying network physical interface classification of other mobile router devices.According to this structure, even under situation about moving between the access network of multiple kind, also can continue communication.
In addition, mobile network system of the present invention has: the structure of using same virtual address, implementing virtual redundancy router protocol, use same virtual address to communicate under as the situation of active router at mobile router device in mobile network's side in the underlying network side of each mobile router device.According to this structure, move the corresponding home address of Care-of Address of destination with the expression mobile router device, irrelevant but unique with the change of mobile router device, the such effect of the setting in path change so do not need to provide and deliver, in addition, do not need the interior communication terminal of mobile network to follow the processing of the change of mobile router device.
In addition, mobile network system of the present invention, has such structure:, will use same virtual address and send to home agent apparatus with binding update messages that the Care-of Address of the corresponding generation of same virtual address is used for carrying out mobile management as the mobile router of active router.
According to this structure, even under the situation of the mobile router that change is used in the mobile network, also there is no need to send the mobile router device that is used in advance using binding update messages positional information, that be used to eliminate the old information in the banding cache at home agent management mobile router device.Have only the actual mobile router device that is connected with the internet of carrying out, only carry out handling by using same virtual address, so can continue communicating by letter of terminal installation in the mobile network and the terminal installation that becomes communication object to the Binding Update of home network.
In addition, in the home agent in home network, move the corresponding home address of Care-of Address of destination with the expression mobile router device, irrelevant but unique with the change of mobile router device, so the setting change in the path that do not need to provide and deliver.
In addition, mobile router device of the present invention, it is contained in mobile network system, and mobile network system comprises: one or more terminal installations; The mobile network, have hold terminal installation, described mobile network is connected to a plurality of mobile router devices of underlying network, described a plurality of mobile router devices comprise active router equipment and standby router equipment; And home agent apparatus is associated home address and manages with Care-of Address.
The mobile network moves to the second place in the underlying network from being connected to the home network that is in the primary importance in the underlying network, when the active router that is positioned at primary importance also moves as active router after the mobile network moves to the second place, described mobile router device will with move to the second place after the corresponding Care-of Address of the above-mentioned virtual address that generates be associated with described virtual address and with described Care-of Address login at home agent apparatus, and, when if the alternate routing apparatus is determined to have lost between active router device and underlying network with being connected of underlying network, the alternate routing apparatus sends binding update messages, and this binding update messages comprises corresponding to the virtual address of described active router device with corresponding to another Care-of Address of described alternate routing apparatus.
According to this structure, when the mobile network moves, even replacing under the situation in fact be used for mobile router device that underlying network is connected with the mobile network, even the situation equivalence that moves with used mobile router device, promptly have a plurality of router apparatus, manage to get final product as a mobile router device by home agent, the setting change in the path that do not need to provide and deliver.
In addition, even under the situation of the mobile router device that change is used in the mobile network, the mobile router device of Shi Yonging also there is no need to send the binding update messages that is used to eliminate the old information in the banding cache that is used in the positional information of home agent management mobile router device in advance.Have only the mobile router device that is connected that in fact carries out with network, undertaken handling, can continue communicating by letter of terminal installation in the mobile network and the terminal installation that becomes communication object to the Binding Update of home network by only using same virtual address.
In addition, in the mobile router device of the present invention, virtual address is when each mobile router device that belongs to the mobile network is connected to home network, any one in the physical address that underlying network side physical interface uses.
According to this structure, owing to there is no need to give again common address, so can realize the saving of address space.In addition, even, also can move as mobile router device according to virtual address for the mobile router device that does not distribute the address in advance.
In addition, mobile router device of the present invention, in order to notify described home agent apparatus mobile router device to move, contain above-mentioned virtual address and the serial number of another binding update messages of sending to home agent apparatus in the active router advertisement packets that sends to the mobile network as active router.
According to this structure, even the mobile router device that Binding Update is handled is carried out in change in home agent, inherit and receive up-to-date serial number and can carry out the Binding Update processing, contain up-to-date information so can guarantee message, and can prevent that home agent is judged as old information with above-mentioned information and discards.
In addition, in the mobile router device of the present invention, active router advertisement packets, the employed virtual router advertisement packets of Virtual Router Redundancy Protocol that mobile network's side of serving as reasons at mobile router device is implemented.According to this structure, use in each mobile router device of virtual redundancy agreement,, send new message so can prevent mobile router device owing to notify up-to-date serial number to other router apparatus, therefore, can prevent to be sent to the increase of the message number in the mobile network.
In addition, in the mobile router device of the present invention, active router advertisement packets, the IPv6 router advertisement message that sends to mobile network's side for the mobile router device that moves as active router.According to this structure, in the mobile router device that moves as router apparatus,, send new message so can prevent mobile router device owing to notify up-to-date serial number to other router apparatus.Therefore, can prevent the increase of the message number that in the mobile network, is sent out.
Description of drawings
Fig. 1 is the schematic diagram of the network architecture relevant with embodiment of the present invention 1;
Fig. 2 is in the network system relevant with embodiment of the present invention 1, the schematic diagram of the structure of mobile network when home network moves;
Fig. 3 is in the network system relevant with embodiment of the present invention 1, the schematic diagram of the structure when change is used for the mobile network with mobile router device that the internet is connected;
Fig. 4 is the block diagram of the structure of the expression mobile router device relevant with embodiment of the present invention 1;
Fig. 5 is the schematic diagram of the step handled of the Binding Update relevant with embodiment of the present invention 1;
Fig. 6 is the schematic diagram with the structure of embodiment of the present invention 1 relevant binding update messages;
Fig. 7 A is the schematic diagram of the form of the migration head ownership in the binding update messages relevant with embodiment of the present invention 1;
Fig. 7 B is the schematic diagram of migration head (mobilityheader) form in the binding update messages relevant with embodiment of the present invention 1;
Fig. 7 C is the schematic diagram of the Binding Update form in the binding update messages relevant with embodiment of the present invention 1;
Fig. 7 D is the schematic diagram of the form of acting on behalf of Care-of Address migration head in the binding update messages relevant with embodiment of the present invention 1;
Fig. 8 is the schematic diagram of the structure of the binding update messages relevant with embodiment of the present invention 1;
Fig. 9 A is the schematic diagram of the home address option form in the binding update messages relevant with embodiment of the present invention 1;
Fig. 9 B is the schematic diagram of a form of the migration head in the binding update messages relevant with embodiment of the present invention 1;
Fig. 9 C is the showing of Binding Update form in the binding update messages relevant with embodiment of the present invention 1
Fig. 9 D is the schematic diagram of the form of acting on behalf of Care-of Address migration option in the binding update messages relevant with embodiment of the present invention 1;
Figure 10 is the block diagram of the structure of the expression mobile router device relevant with embodiment of the present invention 1;
Figure 11 is the precedence diagram of an example of the expression management method of mobile relevant with embodiment of the present invention 1;
Figure 12 is the schematic diagram of the structure of the router advertisement message relevant with this execution mode 1 and 2;
Figure 13 A is the schematic diagram of the router advertisement message form relevant with this execution mode 1 and 2;
Figure 13 B is the schematic diagram of the prefix information option form in the router advertisement message relevant with this execution mode 1 and 2;
Figure 13 C is the advertisement schematic diagram of choice format at interval in the router advertisement message relevant with this execution mode 1 and 2;
Figure 13 D is the schematic diagram of the binding update messages serial number choice format in the router advertisement message relevant with this execution mode 1 and 2;
Figure 14 is an exemplary plot of the banding cache relevant with embodiment of the present invention 1;
Figure 15 is the precedence diagram of an example of the expression management method of mobile relevant with embodiment of the present invention 1;
Figure 16 is an exemplary plot of the banding cache relevant with embodiment of the present invention 1;
Figure 17 is the schematic diagram of the structure of the network system relevant with embodiment of the present invention 2;
Figure 18 is in the network system relevant with embodiment of the present invention 2, the schematic diagram of the structure of mobile network when home network moves;
Figure 19 is in the network system relevant with embodiment of the present invention 2, the schematic diagram of the structure when change is used for the mobile network with mobile router device that the internet is connected;
Figure 20 is the block diagram of the structure of the expression mobile router device relevant with embodiment of the present invention 2;
Figure 21 is the schematic diagram of the step handled of the Binding Update relevant with embodiment of the present invention 2;
Figure 22 is the schematic diagram of the structure of the binding update messages relevant with embodiment of the present invention 2;
Figure 23 A is the schematic diagram of the home address option form in the relevant binding update messages of embodiment of the present invention 2;
Figure 23 B is the schematic diagram of a form of the migration head in the relevant binding update messages of embodiment of the present invention 2;
Figure 23 C is the schematic diagram of the Binding Update form in the relevant binding update messages of embodiment of the present invention 2;
Figure 23 D is the schematic diagram of acting on behalf of Care-of Address migration choice format in the relevant binding update messages of embodiment of the present invention 2;
Figure 24 is the block diagram of the structure of the expression mobile router device relevant with embodiment of the present invention 2;
Figure 25 is the precedence diagram of an example of the expression management method of mobile relevant with embodiment of the present invention 2;
Figure 26 is an exemplary plot of the banding cache relevant with embodiment of the present invention 2;
Figure 27 is the precedence diagram of an example of the expression management method of mobile relevant with embodiment of the present invention 2;
Figure 28 is an exemplary plot of the banding cache relevant with embodiment of the present invention 2;
Figure 29 is the precedence diagram of the virtual redundancy router protocol relevant with embodiment of the present invention 2;
Figure 30 is the schematic diagram of the VRRP field format relevant with embodiment of the present invention 2.
Embodiment
Below, describe with reference to accompanying drawing for embodiment of the present invention.
Fig. 1 is the schematic diagram of the network architecture relevant with embodiment of the present invention 1.
In Fig. 1, the mobile network 1 that expression is connected with home network 20 is connected with internet (underlying network) 8 through gateway 7.The mobile network 1, has: mobile router device MR2, MR3 (also being write as mobile router 2,3) and terminal installation LFN5.The interface of underlying network 8 sides has identical or different physical interfaces in mobile router device MR2, MR3.
As the interface of underlying network 8 sides, for example, can enumerate Ethernet (login trade mark) mode, IEEE802.11 (a, b, e, g etc.) mode, HIPERLAN mode, IMT-2000 mode, PDC mode, GPRS mode, HPS mode etc.In addition, the interface of mobile network's 1 side uses identical interface, for example Ethernet mode, Bluetooth mode, UWB (Ultra Wide Band) mode, IEEE802.11 (a, b, e, g etc.) mode.
In the example of Fig. 1, expression mobile network 1 be connected with home network 20 through mobile router device MR2, and mobile router device MR3 only connects the interface of mobile network's side, does not connect the state of underlying network side interface.In addition, the address of also having expressed the underlying network side interface of mobile router device MR2 is MR2-HoA, and the address of mobile network's side interface is MR3-In, and the address of mobile network's side interface of mobile router device MR3 is MR3-HoA
In addition, by the mobile router device MR2 that home network 20 is connected with mobile network 1, to mobile network's 1 transmission router advertisement message 1010 as shown in FIG. 13A.In addition, in the Option Field 1020 of this router advertisement message 1010, as shown in figure 12, contain the prefix information option 1030 shown in Figure 13 B.Therefore, the default router of terminal installation LFN5 is MR2-In, in addition, is MR2-HoA to the mobile network's 1 of home gateway HGW7 the section of distance next time.
By communication object terminal installation CN11, when the packet of terminal installation LFN5 was mail in transmission, the packet that is sent out arrived home gateway HGW7 according to the routing iinformation in the internet 8.In home gateway HGW7, the packet that mails to mobile network 1 is sent to MR2-HoA.Mobile router device MR2 transmits the packet that mails to terminal installation LFN5 to mobile network 1, and packet is sent to terminal installation LFN5.
On the other hand, as following, carry out to the packet transmission of communication object terminal installation CN11 from terminal installation LFN5.Terminal installation LFN5 is the packet that mobile router device MR2 mails to communication object terminal installation CN11 to the MR2-In as default router.Mobile router device MR2 is when accepting to mail to the packet of communication object terminal installation CN11, whether the destination of decision data bag is the terminal that belongs to home network 20, because communication object terminal CN11 is not the terminal that belongs to home network 20, so to the conduct home gateway HGW7 transmission of distance section next time.Home gateway HGW7, because the destination of the packet that receives is not the packet to network of self home 20, thus transmit to internet 8, and deliver to communication object terminal installation CN11 via internet 8.
Secondly, by moving of mobile network 1,, describe at its example shown in Fig. 2 and Figure 11 for the management method of mobile of change when the tie point of internet 8.
As shown in Figure 2, suppose that mobile network 1 leaves home network 20, moved to the subordinate (S901) of the access router AR9 with physical connection identical with the underlying network side interface of mobile router device MR2.At this moment, mobile router device MR2 receives the router advertisement message (S902) that sends from access router AR9.Generate visit temporary transient Care-of Address MR2-CoA (S903) that uses under router-A R9 by the prefix information that in router advertisement message, comprises.
In addition, Figure 13 A～Figure 10 D is the exemplary plot of router advertisement message 1010 forms, and the advertisement that contains the prefix information option 1030 of Figure 13 B and Figure 13 C at the Option Field 1020 of the router advertisement message 1010 of Figure 13 A is option one 050 at interval.
Next, mobile router device MR2 generates the binding update messages 600 (S904) of storage as illustrative home address MR2-HoA603, Care-of Address MR2-CoA634 among Fig. 6 and Fig. 7 A～Fig. 7 D, and sends (S905) to home agent HA6.Thus, this Care-of Address MR2-HoA as main Care-of Address, is logined among the home agent HA6 on mobile network 1 home network 20.
Home agent HA6, receive binding update messages 600 after, generate the related banding cache 1100 (S906) between clear and definite home address MR2-HoA and the Care-of Address MR2-CoA.Mobile network 1 finishes the transmission preparations (S907) of the mobile network 1 after moving from home network 20.Figure 14 is an exemplary plot of banding cache 1100, related between clear and definite home address 1101, Care-of Address 1102, effective time 1103, sign 1104, serial number 1105 and the habitual information 1106 and with its storage.
And then, mobile router device MR2, be created on not only contain in the Option Field 1020 of router advertisement message 1010 prefix information option 1030, also contain router advertisement message just like the binding message serial number option one 070 shown in Figure 13 D, and mobile network 1 is sent.Be subordinated to the mobile network's 1 who receives the router advertisement message 1010 that contains this binding update messages serial number option one 070 mobile router device, store this serial number.
The packet that mails to terminal installation LFN5 from communication object terminal installation CN11 is sent according to the routing iinformation in the internet 8, arrives home gateway HGW7.In home gateway GHW7, the packet that mails to mobile network 1 transmits to MR2-HoA.
Yet, in home agent HA6, owing to have the banding cache 1100 of MR2-HoA and Care-of Address MR2-CoA,, the MR2-CoA that mails to after the packet encapsulation of terminal installation FLN5 to the Care-of Address of mobile router device MR2 is transmitted so home agent HA6 catches above-mentioned packet.The packet that encapsulated is sent to mobile router device MR2 via access router AR9, removes encapsulation in mobile router device MR2, transmits to terminal installation LFN5.
On the other hand, as following, carry out to the packet transmission of communication object terminal installation CN11 from terminal installation LFN5.Terminal installation LFN5 to as the MR2-In of default router, be the packet that mobile router device MR2 mails to communication object device CN11.Mobile router device MR2 will mail to the packet encapsulation of communication object terminal installation CN11 and transmit to home agent HA6 when accepting to mail to the packet of communication object terminal installation CN11.
The packet that encapsulated is delivered to home agent HA6 via access router AR9, in home agent HA6, remove encapsulation, the result of destination address is mail in inspection, because destination address does not belong to home network 20, so transmit to communication object terminal installation CN11 via internet 8.
Secondly, the management method of mobile when having found the operable access link of mobile router device MR3 finding the operable access link of mobile router device MR2, expression one example describes in Fig. 3 and Figure 15.
As shown in Figure 3, suppose that mobile network 1 leaves home network 20 or accesses network 21, and moved to the subordinate (S1201) of the access router AR10 with physical link identical with the underlying network physical interface of mobile router device MR3.
At this moment, in mobile router device MR2, from receiving the moment of the router advertisement message 1010 that access router AR9 sends at last, outclass the router advertisement that in above-mentioned router advertisement message 1010, comprises time of 1054 is (for example at interval even passed through, advertisement at interval * 3), can't receive under the situation of next router advertisement message 1010, be judged as the connectivity of having lost with access router AR9.
In addition, mobile router device MR3 receives the router advertisement message 1010 (S1202) from access router AR9.Mobile router device MR3 obtains prefix information 1043 from above-mentioned router advertisement message 1010, is created on the temporary transient Care-of Address MR3-CoA (S1203) that uses of access router AR10 subordinate.
Next, mobile router device MR3 detects being stopped from the mobile router device MR2 transmission of the router advertisement message 1010 of transmission regularly.From receiving the moment of the up-to-date router advertisement message 1010 that mobile router device MR2 sends, outclass the router advertisement that in above-mentioned router advertisement message 1010, comprises time of 1054 is (for example at interval even passed through, advertisement at interval * 3), and can't receive under the situation of next router advertisement message 1010, the transmission that is judged as the router advertisement message 1010 that regularly sends from mobile router device MR2 has been stopped.
At this moment, illustrated as Fig. 8 and Fig. 9, not at home address from mobile router device MR3, but will be when mobile network 1 be connected with home network 20, as the home address MR2-HoA of the mobile router device MR2 that links the router action, as the home address in binding update messages 603, store Care-of Address MR3-CoA734.
And then, generate storage adds the sequence number after 1 to the serial number of being notified by mobile router device MR2, by the binding update messages serial number option one 070 of router advertisement message 1010 in serial number 621 binding update messages 700 (S1204).By sending the binding update messages 700 (S1205) that generates, this Care-of Address MR3-HoA as main Care-of Address, is logined among the home agent HA6 on mobile network 1 home network 20 to home agent HA6.
Home agent HA6, receive binding update messages 700 after, generate the related banding cache 1300 (S1206) between clear and definite home address MR2-HoA and the Care-of Address MR3-CoA.Mobile network 1 finishes the transmission preparations (S1207) of the mobile network 1 after moving from home network 20.
Figure 16 is an exemplary plot of banding cache 1300, related between clear and definite home address 1101, Care-of Address 1302, valid period 1103, sign 1104, serial number 1105 and the habitual information 1106 and with its storage.
Lose the mobile router device MR2 that is connected with external network, stop transmission to the router advertisement message 1010 of mobile network's 1 transmission, again the mobile router device MR3 that is connected with external network begins the transmission of router advertisement message 1010 to the mobile network.Thus, after the effective time of containing in the last router advertisement message that the mobile router device MR2 that associates sends 1040, the default router of terminal installation LFN5 becomes MR3-In.
The packet that mails to terminal installation LFN5 from communication object terminal installation CN11 sends according to the routing iinformation in the internet 8, arrives home gateway HGW7.In home gateway HGW7, the packet that mails to mobile network 1 is sent to MR2-HoA.
Yet, in belonging to for HA6, owing to have MR2-HoA and Care-of Address MR2---the banding cache 1300 of CoA,, will mail to the packet encapsulation of terminal installation FLN5 and transmit to the MR3-CoA of the Care-of Address of mobile router device MR3 so home agent HA6 catches above-mentioned packet.
The packet that encapsulated is delivered to mobile router device MR3 via access router AR10, removes encapsulation in mobile router device MR3, transmits to terminal installation LFN5.
On the other hand, send to the packet of communication object terminal installation CN11 from terminal installation LFN5 by following carrying out like that.Terminal installation LFN5 mails to the packet of communication object device CN11 to the mobile router device MR3 as the MR3-In of default router.Mobile router device MR3 when accepting to mail to the packet of communication object terminal installation CN11, encapsulates the packet that mails to communication object terminal installation CN11 and transmits to home agent HA6.
The packet that encapsulated is delivered to home agent HA6 via access router AR10, in home agent HA6, remove encapsulation, result to after the destination address inspection does not belong to home network 20 owing to mail to the destination, so transmit to communication object terminal installation CN11 via internet 8.
Secondly, the structure example of expression mobile router device MR2, MR3 in Fig. 4, and describe.
Fig. 4 is the schematic diagram of the structure example of mobile router device MR2, MR3, is made of underlying network physical interface 12, L3 handling part 13, mobile network's physical interface 14, MobileIPv6 handling part 15 and mobile management handling part 23.
Underlying network physical interface 12 carries out following processing: the processing of carrying out the physical layer process of the packet received from underlying network 8 side joints and data link layer deals and delivering to L3 handling part 13; In order to send, the packet that receives from L3 handling part 13, carry out data link layer deals and physical layer process to underlying network 8.
Mobile network's physical interface 14 carries out following processing: the processing of carrying out the physical layer process of the packet received from mobile network's 1 side joint and data link layer deals and delivering to L3 handling part 13; In order to send, the packet that receives from L3 handling part 13, carry out data link layer deals and physical layer process to mobile network 1.
And then, in L3 handling part 13, carrying out generation, the transmitting-receiving of router advertisement message 1010 handles, and judgement other router apparatus in the mobile network, whether as the mobile router device action that is used for the mobile router device of internuncial supervision of underlying network and is used for mobile network and underlying network are linked.
In addition, in L3 handling part 13, MobileIPv6 handles the handing-over of carrying out where necessary with MobileIPv6 handling part 15 in packet.
Mobile management handling part 23 carries out following processing: accept storage in order to detect the processing of moving the prefix information that is contained in the admission advertisement information that the underlying network physical interface receives by the L3 handling part; Be stored in the processing of the home address that uses in the backbone physics physical interface 12 of the mobile router device in the mobile network 1; Be kept at the processing of the serial number that uses in the binding update messages; When mobile and under the accesses network situation about being connected, carry out mobile management, deliver the processing of this address and serial number to MobileIPv6 handling part 15 in order to use home address.
To the basic action of the mobile router device MR2 of formation as shown in Figure 4, describe.The packet of mobile router device MR2 as shown in Figure 4 transmits action, and is as described below.In addition, mobile router device MR3 also is same structure and carries out same action.
Mobile router device MR2, the state of supervision underlying network physical interface 12.By the underlying network side, when reception comprises the router advertisement message of prefix information option 1030 and advertisement interval option one 050, be judged as underlying network physical interface 12 and be state with network connections, this connection status, last by the router advertisement message 1010 that receives, even, be judged as and lost this connectivity receiving under the situation of next router advertisement message 1010 with same prefix information 1043 through certain hour.
In addition, simultaneously, judge in the mobile network whether have mobile router device as the mobile router action that the mobile network is connected with underlying network.Promptly, by mobile network's side, when other router apparatus sent router advertisement message 1010 termly, the mobile router device that is judged as the mobile router action existed in the mobile network, when not being such, being judged as such mobile router device and not existing.
When the mobile router device that state that underlying network physical interface 12 is connected with network and conduct are connected the mobile network with underlying network mobile router moves does not exist, move as router apparatus, and carry out the transmission processing of the packet between underlying network 8 and the mobile network 1.
When mobile router device MR2 moves as router apparatus, after network physical interface 12 carries out physical layer protocol processing, SDL processing, transmit the packet that receives from underlying network 8 to the L3 handling part 13 that carries out the IP protocol processes, when implementing the IP processing, MobileIPv6 handling part 15 carries out the additional IP head relevant with MobileIPv6 and handles according to the MobileIPv6 processing procedure.After this, the result that the route in L3 handling part 13 is handled is sent to any one in underlying network physical interface 12 or the mobile network's physical interface 14.
On the other hand, for the packet that receives from mobile network 1, after the processing of mobile network's physical interface 14, also transmit to the L3 handling part 13 that carries out the IP protocol processes, when implementing the IP processing, MobileIPv6 handling part 15 carries out the additional IP head relevant with MobileIPv6 and handles according to the MobileIPv6 processing procedure.After this, the result that the route in L3 handling part 13 is handled is sent in underlying network physical interface 12 or the mobile network's physical interface 14 any one.
Be created on the router advertisement message 1010 of having stored prefix information option 1030 in the Option Field 1020 in this external L3 handling part 13, transmit the message packets that generates to mobile network's physical interface 14.
In addition, self not when moving as router apparatus, do not carry out the processing relevant and discarded transfer data packets with transfer data packets, in addition, also do not carry out the generation of router advertisement message.And then mobile network's physical interface receives, the packet that transmits at the L3 handling part is the router advertisement message 1010 that other router apparatus send, and then when not containing binding update messages serial number option one 070, to mobile management handling part 23 notification sequence number, the mobile management handling part 23 that receives the serial number notice is preserved serial numbers.
Secondly, handle action, describe with Fig. 5～Fig. 7 for the Binding Update of the mobile router device MR2 of mobile network 1 when home network 20 moves.
Fig. 5 is the figure of the Binding Update processing procedure of expression mobile router device MR2.Mobile router device MR2, by mobile management handling part 23, the prefix prefix 1043 of the prefix information option 1030 that L3 handling part 13 is comprised from the router advertisement message 1010 that underlying network physical interface 13 receives is checked, the prefix that contains in prefix 1043 and the router advertisement message that received in the past detects and has changed to the tie point of underlying network 8 i.e. mobile (S51) not simultaneously.
Detecting when mobile, generating Care-of Address (S52) by prefix information 1043 that contains in router advertisement message 1010 and virtual address from mobile network 8.When generating Care-of Address, judge that whether self is as router apparatus action (S55).Under situation, generate binding update messages 600 as shown in Figure 6 and send (S56) as the router apparatus action.
In binding update messages 600, at least contain home address option 605, migration 610 in the extension header of IPv6 destination address option head, at least contain Binding Update 620 in the message data in the migration head, contain at least in the migration option in Binding Update and act on behalf of Care-of Address option 630.In addition, in the sequence number field 621 in Binding Update 620, preserve the serial number of preserving to mobile management handling part 23 and add 1 sequence number that obtains.
Do not detecting under the situation of movement, judging the binding response message (S53) that whether receives at the binding update messages that sends before.It whether is effective elapsed time of the binding update messages that sends before this, next message sends judgement (S54) regularly, self being, if necessary generate and send binding update messages 600 (S56) as the occasion (S55) of router apparatus action.
And then behind the transmission binding update messages 600, mobile management handling part 23 is updated to the sequence number of having stored with the serial number of preserving in the sequence number field 621 of the binding update messages 600 that sent.
In addition, among the mobile router device MR2 that moves as router apparatus, be judged to be under the mobile situation at mobile management handling part 23, by the serial number of 23 pairs of L3 handling parts of mobile management handling part, 13 notice storages in the serial number 621 of binding update messages 600.In L3 handling part 13, generation contains in binding message serial number 1074 the binding message serial number option one 070 of storage notification sequence number and the router address message 1010 of prefix information option 1030, and, send by 14 couples of mobile networks of mobile network's physical interface 1 to 14 transmission of mobile network's physical interface.
In addition, mobile router device MR2 also can have mobile router device MR2 self produces and send data packet function and receive the function of packet as terminal, and the structure example of this moment below describes as shown in figure 10.Basic structure is identical with as shown in Figure 4 structure, but also contains the upper layer handling part 17 of processing of the upper layer that carries out TCP and UDP etc. and the application handling part 18 that carries out application controls.
Below the elemental motion of the mobile router device MR2 that constitutes is as described above described.The transmission action of the mobile router device MR2 starting of structure shown in Figure 10 is carried out like that by following.
To use the data that handling part 18 generates in order sending to internet 8,, to transmit to the L3 handling part 13 that carries out the IP protocol processes via the upper layer handling part 17 of the processing of abideing by agreements such as socket, TCP or UDP.When implementing the IP processing, the MobileIPv6 handling part 15 of abideing by the processing of MobileIPv6 processing procedure carries out the additional IP head relevant with MobileIP and handles.After underlying network physical interface 12 carries out SDL processing and physical layer protocol processing, send to underlying network 8.
In addition, the transmission data that the application handling part 18 of mobile router device MR2 generates in order to send to mobile network 1, upper layer handling part 17 via the processing of abideing by agreements such as socket, TCP or UDP transmits to the L3 handling part 13 that carries out the IP protocol processes.Implement IP and handle, after mobile network's physical interface 14 carries out SDL processing and physical layer protocol processing, send to mobile network 1.
In addition, mobile router device MR2 becomes the reception action of terminal, is that the operation opposite with sending action carried out like that according to following.
The packet that will receive from underlying network 8 carries out after physical layer protocol and SDL handle at underlying network physical interface 12, carry out in the IP protocol processes at L3 handling part 13, MobileIPv6 handling part 15 carries out the additional IP head processing relevant with MobileIP simultaneously.Then carry out the processing of upper layer handling part 17 and transmit to using handling part 18.
The packet that will receive from mobile network 1 carries out carrying out the IP protocol processes at L3 handling part 13 after physical layer protocol and SDL handle at mobile network's physical interface 14.Then carry out the processing of upper layer handling part 17 and transmit to using handling part 18.
In addition, in the present embodiment, mobile router device being narrated as 1 as 2, terminal installation, certainly, also is applicable under the situation that multiple arrangement exists.
As described above in the present embodiment, in having the mobile network of a plurality of mobile router devices, interface in the underlying network side of mobile router device is distributed to as common address in some addresses of a plurality of mobile router devices, use is carried out Binding Update at this Care-of Address and is handled, thus, Yi Bian can or else increase under the situation of load of network, can provide the terminal installation in the mobile network that MobileIPv6 is not installed between multiple accesses network, to move the function that communicates on one side.
In addition, in the present embodiment, as the mobile router device of router action, to the mobile router device that does not have action as the mobile router device that in same mobile network, exists, the serial number that notice is used in Binding Update.When will not have the mobile router device of action to move, upgrade the up-to-date serial number of above-mentioned notice as above-mentioned router apparatus as router apparatus.Carry out Binding Update by using with the mobile router device and the same virtual address of moving as router apparatus, in the mobile network, there are a plurality of mobile router devices, and be used in switching under the situation of the mobile router device that links with underlying network, under the situation of the switching of imperceptible mobile router, home agent can be managed up-to-date mobile message.Thus, even when a plurality of mobile router is set in the mobile network, also can under the situation of the load that does not increase network, deal with mobile.
(execution mode 2)
Figure 17 is an exemplary plot of the structure of the mobile network system relevant with embodiment of the present invention 2.
Figure 17 is the mobile network 1 who links with home network 20, is connected to the exemplary plot of internet (underlying network) 8 through home gateway 7.The mobile network 1, has mobile router device MR2, MR3 and terminal installation LFN5.In mobile router device MR2, MR3, the interface of underlying network 8 sides has identical or different physical interfaces.
As the interface of underlying network 8 sides, for example can enumerate Ethernet (login trade mark) mode, IEEE802.11 (a, b, e, g etc.) mode, HIPERLAN mode, IMT-2000 mode, PDC mode, GPRS mode, HPS mode etc.In addition, the interface of mobile network's 1 side uses identical interface, for example Ethernet mode, Bluetooth mode, UWB (Ultra Wide Band) mode, IEEE802.11 (a, b, e, g etc.) mode.
Mobile router device MR2, MR3, virtual redundancy router protocol in the interface of starting mobile network 1 side, specifically, VRRP (Virtual Router Redundancy Protocol) for example.
In the example of Figure 17, the relative importance value of supposing the active router standby router relation of decision mobile router device MR2 is 100, supposes that the relative importance value of mobile router device MR3 is 80, the active router standby router relation that follows the physical interface of mobile network's 1 side at the physical interface of backbone physics 8 sides, the router that becomes active router carry out with backbone physics and with mobile network's binding.At this, mobile router device MR2 comes work as active router, and mobile router device MR3 comes work as standby router, represents with solid line and dotted line in Figure 17.
In the physical interface of mobile network's 1 side, with VRIP (MRi) as virtual router ip address, home network 20 sides with VRIP (MRo) as virtual router ip address.VRIP (MRi), VRIP (MRo) are according to the IPv6 address format, and for example VRIP (MRi) is 3ffe:0501::5F00:0202:2cff:fe00:000A, and VRIP (MRo) is 3ffe:0501::0100:0202:2cff:fe00:0001.Therefore, the default gateway of terminal installation LFN5 is VRIP (MRi), to the mobile network's 1 of home gateway HGW7 next distance section VRIP (MRo).
By communication object terminal installation CN11, when the packet of terminal installation LFN5 was mail in transmission, the packet of transmission arrived home gateway HGW7 according to the routing iinformation in the internet 8.In home gateway HGW7, mail to mobile network 1 packet to VRIP (MRo).As the mobile router device MR2 of active router, transmit the packet that mails to terminal installation LFN5 to mobile network 1, packet is sent to terminal installation LFN5.
On the other hand, carry out like that by following to the packet transmission of communication object terminal installation CN11 from terminal installation LFN5.Terminal installation LFN5 is to the packet that mails to communication terminal CN11 as the VRIP (MRi) of default router.Mobile router device MR2 as active router, when accepting to mail to the packet of communication object terminal installation CN11, whether the destination address of judgment data bag is the terminal that belongs to home network 20, because communication terminal CN11 is not the terminal that belongs to home network 20, so to the conduct home gateway HGW7 transmission of distance section next time.Home gateway HGW7 because the destination address of the packet that receives is not the packet to the home network 20 of self, so transmit to internet 8, sends to communication object terminal installation CN11 via internet 8.
Can not receive that router advertisement message 1010, mobile router device MR2 from the access router that is connected with underlying network can not find the access link that is connected with underlying network and packet transmits in impossible occasion etc. at occasion that mobile router device MR2 breaks down or mobile router device MR2, become the transmission that active router carries out packet as the mobile router device MR3 of standby router.At this moment, because interface IP address do not become VRIP (MRo), VRIP (MRi), so terminal installation LFN5 there is no need to belong in home gateway HGW7 and carries out any new processing.
Secondly, to because the moving of mobile network 1, and the management method of mobile of change when the tie point of internet 8, its example of expression and describing in Figure 18 and Figure 25.
As shown in figure 18, suppose that mobile network 1 leaves home network 20, move to the subordinate (S2101) of the access router AR9 with physical link identical with the underlying network side interface of mobile router device MR2.
At this moment, mobile router device MR2, reception sends router advertisement message (S2102) from access router AR9, by the prefix information that contains in router advertisement message, is created under the access router AR9 the temporary transient Care-of Address CoA-9 (MR) that uses (S2103).As an example of generation method, the upper bit (prefix long) that the address arranged is the value of the prefix that obtains, and the next bit is the method for the identical bit of the corresponding bit of virtual address.
In addition, Figure 12 and Figure 13 A～Figure 13 D are the exemplary plot of the form of router advertisement message 1010, contain the prefix information option of representing with Figure 12 and Figure 13 B 1030 in router advertisement message 1010, and the advertisement of representing with Figure 12 and Figure 13 C option one 050 at interval.In addition, in the present embodiment, in router advertisement message 1010, there is no need to comprise the binding message serial number option one of representing with Figure 12 and Figure 13 D 070.Contain prefix long 1033 and prefix information 1043 at prefix information option 1030 internal memories.
For example, prefix in the prefix information option 1030 long 1033 is 64 bits, when prefix information 1043 was 3ffe:0501::1f00:3110:5aff:fe00:4326, the Care-of Address CoA-9 that above-mentioned VRIP (MRo) is generated was 3ffe:0501::1f00:0202:2cff:fe00:0001.
In addition, as an example of generation method, expression the send as an envoy to the next bit and the method for the corresponding bit same bits of virtual address of the address that generates, but about this next bit partly also can be by using other mode, for example use random number etc. to generate.
Mobile router device MR2, owing to come work as active router, so, afterwards, generate storage shown in Figure 22 and Figure 23 A～Figure 23 D home address VRIP (MRo) 1903 and the binding update messages 1900 (S2104) of Care-of Address CoA-9 (MR) 1934, and send (S2105), like this to home agent HA6, as main Care-of Address, the home agent HA6 on mobile network 1 home network 20 logins with this Care-of Address CoA-9 (MR).
Home agent HA6, after receiving binding update messages 1900, generate the related banding cache 2200 (S2106) between clear and definite home address VRIP (MRo) and the Care-of Address CoA-9 (MR), the transmission preparations of the mobile network 1 after mobile network 1 moves from home network 20 finish (S2107).Figure 26 is an exemplary plot of banding cache 2200, related between clear and definite home address 2201, Care-of Address 2202, valid period 2203, sign 22104, serial number 2205 and the habitual information 2206 and with its storage.
The packet that mails to terminal installation LFN5 from communication object terminal installation CN11 sends according to the routing iinformation in the internet 8, arrives home gateway HGW7.In home gateway GHW7, the packet that mails to mobile network 1 transmits to VRIP (MRo).Yet, in home agent HA6, owing to preserve the banding cache 2200 of VRIP (MRo) and Care-of Address CoA-9 (MR), so home agent HA6 catches above-mentioned packet, will mail to the packet encapsulation of terminal installation FLN5 and transmit to the Care-of Address CoA-9 of mobile router device MR2 (MR).The packet that encapsulated is sent to mobile router device MR2 via access router AR9, removes encapsulation in mobile router device MR2, transmits to terminal installation LFN5.
Secondly, under the situation that can not find the operable access link of mobile router device MR2, the management method of mobile when having found the operable access link of mobile router device MR3 illustrates with Figure 19 and exemplary plot shown in Figure 27.
In mobile router device MR2, MR3, relative importance value is changed according to connectivity with underlying network 8.In the time can being connected with underlying network, making relative importance value is general value, but die down at received electric field strength, make it to receive regular router advertisement message etc., along with connectivity worsens, the value corresponding with the network bandwidth reduces, and when can not get connectivity fully, relative importance value then is 0.At this moment, when mobile router device MR3 can obtain connectivity, mobile router device MR3 became higher than mobile router device MR2 relative importance value, and mobile router device MR3 just becomes active router.
As shown in figure 19, suppose that mobile network 1 leaves accesses network 21, move to the subordinate (S2301) of the access router AR10 with physical link identical with the underlying network physical interface of mobile router device MR3.At this moment, in mobile router device MR2, with the connectivity variation of underlying network 8, can not receive router advertisement message 1010 (S2310), with the router advertisement message 1010 (S2302) of mobile router device MR3 reception from access router AR10 from access router AR9.
Mobile router device MR3 obtains prefix information 1043 from above-mentioned router advertisement message 1010, is created under the access router AR10 the temporary transient Care-of Address CoA-10 (MR) that uses (S2303).For example, prefix in the prefix information option 1030 that contains in the router advertisement message 1010 that receives in S2302 long 1033 is 64 bits, when prefix information 1043 was 3ffe:0501::2f00:3110:5aff:fe00:4326, the Care-of Address CoA-10 that above-mentioned VRIP (MRo) is generated was 3ffe:0501::2f00:0202:2cff:fe00:0001.In mobile router device MR2, MR3, according to connectivity relative importance value is changed as described above with underlying network.When the worthwhile mobile router device MR3 of this relative importance value uprised, mobile router device MR3 just became active router (S2304).
Mobile router device MR3, owing to come work as active router, so, afterwards, generate storage shown in Figure 22 and Figure 23 A home address VRIP (MRo) 1903 and the binding update messages 1900 (S2305) of Care-of Address CoA-10 (MR) 1934, and send (S2306), like this to home agent HA6, as main Care-of Address, the home agent HA6 on the home link of mobile router device MR3 logins with this Care-of Address CoA-10 (MR).
Behind the binding update messages 1900 of home agent HA6 reception from mobile router device MR3, the banding cache of home address VRIP (MRo) is updated to related banding cache 2400 (S2307) between clear and definite home agent VRIP (MRo) and the Care-of Address CoA-10 (MR), and the transmission preparations (S2308) when finishing in mobile network 1, to replace the mobile router device that is used for being connected with underlying network 8.
Below, from communication object terminal installation CN11 when terminal installation LFN5 sends packet, be replaced as the subordinate's who is in access router AR10 situation by the situation that mobile network 1 is in the subordinate of access router AR9, be about to Care-of Address CoA-9 (MR) and be replaced as CoA-10 (MR), carry out action same as described above, so omit explanation.
Secondly, Figure 20 represents the configuration example of mobile router device MR2, MR3, and describes.
Figure 20 is the schematic diagram of the structure example of mobile router device MR2, MR3, handles 23 by underlying network physical interface 12, L3 handling part 13, mobile network's physical interface 14, MobileIPv6 handling part 15, virtual router handling part 16 and mobile management and constitutes.
Underlying network physical interface 12 carries out following processing: the processing of carrying out the physical layer process of the packet received from underlying network 8 side joints and data link layer deals and delivering to L3 handling part 13; In order to send, carry out to the packet that receives from L3 handling part 13 processing of data link layer deals and physical layer process to underlying network 8; Monitor internuncial link quality of expression and underlying network 8, and deliver the processing of link information to the virtual router handling part.
Mobile network's physical interface 14 carries out following processing: the processing of carrying out the physical layer process of the packet received from mobile network's 1 side joint and data link layer deals and delivering to L3 handling part 13; In order to send, to carrying out the processing of data link layer deals and physical layer process the packet that receives from L3 handling part 13 to mobile network 1.
Virtual router handling part 16 according to virtual redundancy router protocol, is used for other mobile routers in same mobile network as a virtual processing that router moves.Carry out following processing: the reception according to the virtual router advertisement packets that obtains from the processing of the connectivity information-change relative importance value of underlying network physical interface 12, from 13 acceptance of L3 handling part is handled, the processing that generates the virtual router advertisement packets and deliver to L3 handling part 13, and will self be the processing that the active router or the information of standby router are stored in mobile management handling part 23.Moreover, also carry out the serial number that is comprised is handed to the processing of mobile management handling part 23 in the virtual router advertisement that receives.
Mobile management handling part 23 carries out following processing: the processing that is stored in the address of using in the backbone physics physical interface 12 of the mobile router device in the mobile network 1; The processing of the serial number that preservation is received by the virtual router handling part; Whether accept self from virtual router handling part 16 is the information of active router, and when being active router in order to use virtual address to carry out mobile management, deliver the processing of this address and serial number to MobileIPv6 handling part 15.
Basic action to the mobile router device MR2 that constitutes as Figure 20 describes.The packet of mobile router device MR2 shown in Figure 20 transmits action, carries out like that according to following.In addition, mobile router device MR3 also has same formation and moves equally.
Mobile router device MR2 monitors self state of in virtual router handling part 16 management, and whether discern self is active router.
When self is active router, after underlying network physical interface 12 carries out physical layer protocol processing, SDL processing, transmit the packet that receives from underlying network 8 to the L3 handling part 13 that carries out the IP protocol processes, when implementing the IP processing, MobileIPv6 handling part 15 carries out the additional IP head relevant with MobileIPv6 and handles according to the MobileIPv6 processing procedure.After this, the result that the route in L3 handling part 13 is handled is sent in underlying network physical interface 12 or the mobile network's physical interface 14 any one.
On the other hand, for the packet that receives from mobile network 1, also by after the processing of mobile network's physical interface 14, transmit to the L3 handling part 13 that carries out the IP protocol processes, when implementing the IP processing, MobileIPv6 handling part 15 carries out the additional IP head relevant with MobileIPv6 and handles according to the MobileIPv6 processing procedure.After this, the result that the route in L3 handling part 13 is handled is sent in underlying network physical interface 12 or the mobile network's physical interface 14 any one.
In addition, when self is standby router, do not carry out processing relevant and discarded transfer data packets with transfer data packets.
Secondly, the Binding Update of the mobile router device MR2 of mobile network 1 when home network 20 moves is handled action, describe with Figure 21～Figure 23.
Figure 21 is the figure of the Binding Update processing sequence of expression mobile router device MR2.Mobile router device MR2 generates Care-of Address (S52) by prefix information 1043 that contains in the router advertisement message 1010 from mobile network 8 and virtual address when detecting mobile (S51).When generating Care-of Address, judge that whether self is as active router device action (S181).Under situation, generate and send binding update messages 1900 (S182) as shown in figure 22 as the active router device action.
Shown in Figure 22 and Figure 23 A～Figure 23 D, in binding update messages 1900, contain at least in the extension header of IPv6 destination address option head to contain at least in home address option 1905, migration 1910, the message data in the migration head to contain at least in Binding Update 1920, the migration option in Binding Update and act on behalf of Care-of Address option one 930.In home address option 1905, the home address of storing virtual address rather than mobile router device self in home address field 1903.In addition, reset and be illustrated in the V sign 1922 that utilization in the Binding Update 1920 has the order of virtual address.
Do not detecting under the mobile situation, judge the binding response message (S53) that whether receives at the binding update messages that sends before this, it whether is effective elapsed time of the binding update messages that sends before this, message sends judgement (S54) regularly next time, when self moving (S181), if necessary generate and send binding update messages 600 (S182) as active router.
And then behind the transmission binding update messages 600, mobile management handling part 23 is updated to the serial number of preserving the sequence number of storage in the sequence number field 621 of the binding update messages 600 that sent.
In addition, at this, mobile detection among the so-called S51, in fact after moving, mobile network 1 changed the situation with the tie point of internet 8, also contain with good grounds virtual redundancy router protocol, the situation that the operate condition of mobile router device MR2 physically changes to active router from standby router in the starting of mobile network's 20 sides.
Secondly, mobile router device MR2, Figure 29 represent an example based on the order of virtual redundancy router protocol, below the deterioration mobile router device MR3 by chain environment are described to the order of active router migration.Suppose that mobile router device MR2 comes work as active router, mobile router device MR3 as standby router.
As the mobile router device MR2 of active router, send the virtual router advertisement packets (S2501) of the VRRP field 2600 that contains as shown in figure 30 termly from mobile network's physical interface.The virtual router advertisement packets contains the priority level information of mobile router device and advertisement at interval.The mobile router device that moves as standby router, priority level information in this packet is littler than the relative importance value of self, perhaps the certain timeout value that decides according to advertisement packets with interior situation about not receiving from the virtual router advertisement packets of active router under, active router is no longer suitable, and self just becomes active router.
Follow moving of mobile network 1, during the quality variation of the communication link between mobile router MR2 and access router AR9, reduce relative importance value (S2502) by the virtual router handling part 16 in the mobile router device MR2.
Mobile router device MR2, the priority level information that storage is lowered according to the chain environment variation continues to send termly virtual router advertisement packets (S2503).
Mobile router device MR3, when receiving the virtual router advertisement packets, with reference to the priority level information in the virtual router advertisement packets, verify whether low than the relative importance value of self, if the relative importance value high-self of self is just as active router (S2504).
Become the mobile router device MR3 of active router, send the virtual router advertisement packets (S2505) of storing self relative importance value from mobile network's physical interface 14 termly.
Mobile router device MR2 when receiving the virtual router advertisement packets of the storage relative importance value higher than the relative importance value of self (S2505), self just becomes standby router (S2506), stops the transmission of virtual router advertisement packets, ends the processing as router.
The VRRP field of the virtual router advertisement packets in the present embodiment, as shown in figure 30 for existing VRRP field, reset M sign 1605, when this bit is set, virtual redundant router moves with mobile router, and the VRRP field 2600 that is illustrated in the virtual router advertisement packets contains sequence number field 2613.In the sequence number field 2613 in VRRP field 2600, be stored in the value of in sequence number field 1921, storing in the binding update messages 1900 before this.Under the situation that active router has exchanged, add 1 to the value of this sequence number field 2613, put into binding update messages 1900.
In addition, mobile router device MR2 also can have mobile router device MR2 self produces and send data packet function and receive the function of data packet as terminal installation, and the configuration example of this moment describes following as shown in figure 24.Basic structure is identical with structure shown in Figure 20, but also contains the upper layer handling part 17 of the upper layer processing of carrying out TCP, UDP etc. and the application handling part 18 that carries out application controls.
Below the elemental motion of mobile router device MR2 is as constituted above described.The transmission action of the mobile router device MR2 starting of structure shown in Figure 24 is by carrying out to get off.
Use the transmission data that handling part 18 generates in order to send to internet 8, upper layer handling part 17 via the processing of abideing by agreements such as socket, TCP or UDP, transmit to the L3 handling part 13 that carries out the IP protocol processes, when implementing the IP processing, carry out NobileIPv6 handling part 15 according to the processing of MobileIPv6 processing procedure, carrying out the additional IP head relevant with MobileIPv6 handles, after underlying network physical interface 12 carries out SDL processing and physical layer protocol processing, send to underlying network 8.
In addition, this moment since source address carry out with the original home address of mobile router device or at the Care-of Address of the original home address of mobile router device, so it is irrelevant with the master-backup in the virtual redundancy router protocol, Binding Update at this Care-of Address is handled, and carries out with common MobileIPv6.
In addition, the transmission data that the application handling part 18 of mobile router device MR2 generates in order to send to mobile network 1, upper layer handling part 17 via the processing of abideing by agreements such as socket, TCP or UDP, transmit to the L3 handling part 13 that carries out the IP protocol processes, implementing IP handles, after mobile network's physical interface 14 carries out SDL processing and physical layer protocol processing, send to mobile network 1.
In addition, mobile router device MR2 is as the reception of terminal installation action, is the operation opposite with sending action and carries out like that by following.
The packet that will receive from underlying network 8 carries out after physical layer protocol and SDL handle at underlying network physical interface 12, carry out in the IP protocol processes at L3 handling part 13, MobileIPv6 handling part 15 carries out the additional IP head processing relevant with MobileIP simultaneously.Then carry out the processing of upper layer handling part 17 and transmit data to using handling part 18.
Will be from the packet of mobile network's 1 reception, after mobile network's physical interface 14 carries out physical layer protocol and SDL processing, L3 handling part 13 carries out the IP protocol processes, then, carries out the processing of upper layer handling part 17 and transmits data to using handling part 18.
In addition, in the present embodiment, mobile router device is made as 2, terminal installation is made as 1 and narrates, still, certainly, even under the situation that multiple arrangement exists, also can be suitable for.
As described above in the present embodiment, in having the mobile network of a plurality of mobile router devices, in the underlying network side interface of mobile router device, use virtual address, at mobile network's side interface starting virtual redundancy router protocol, by using underlying network side interface virtual address and carry out Binding Update at its Care-of Address and handle, Yi Bian under the situation of the load that does not increase network, can provide the terminal installation in the mobile network that MobileIPv6 is not installed between multiple accesses network, to move the function that communicates on one side.
The possibility of using on the industry
As described above, the present invention is on the mobile road that is provided with a plurality of connection mobile networks and accesses network In the situation by apparatus, be in the situation of the load that does not increase network, realize the mobile road of using By the change of apparatus, so, be applicable to a certain network integral body as a unit, in different visits Ask mobile network system mobile between network etc.
Claims (18)
1. mobile router device, it is used for holding one or more terminal installations and first access router by a plurality of access router and connects and be positioned at the mobile network of primary importance and the underlying network with described a plurality of access router, described mobile network moves in underlying network with being connected to second access router in a plurality of access router by moving to the second place
It is characterized in that possessing:
Whether the mobile router device that decision is used to connect described mobile network and described underlying network is as the unit of active router action;
Record belong to the described mobile network who is positioned at first and second positions mobile router device common virtual address, for described virtual address, the generation mobile router device is in the unit of the utilizable Care-of Address of the second place; With
Under the situation of mobile router device as described active router action, generate and send the unit that makes the described virtual address binding update messages corresponding with described Care-of Address,
Wherein,
The mobile network further comprises the alternate routing apparatus,
If the alternate routing apparatus is determined to have lost between the mobile router device and first access router and being connected of underlying network, the alternate routing apparatus sends another binding update messages, and described another binding update messages comprises corresponding to the virtual address of this mobile router device with corresponding to the Care-of Address of alternate routing apparatus.
2. mobile router device according to claim 1 is characterized in that,
Described virtual address is distributed to any one mobile router device of each mobile router device that belongs to described mobile network as the real address.
3. mobile router device according to claim 1 is characterized in that having:
Monitor the unit of the quality of the link that is connected with described underlying network;
Use the unit of the relative importance value that decides described active router and standby router according to the quality change of described link; With
Decide mobile router device whether as the unit of described active router action according to described relative importance value.
4. mobile router device according to claim 1 is characterized in that also having:
Under the situation of mobile router device, be the serial number of the described binding update messages of storage in the active router advertisement packets of described active router and the unit that sends described active router advertisement packets in notice as the action of described active router.
5. mobile router device according to claim 4 is characterized in that, described active router advertisement packets is used the virtual router advertisement according to Virtual Router Redundancy Protocol.
6. mobile router device according to claim 4 is characterized in that,
Described active router advertisement packets is used the IPv6 router advertisement message.
7. mobile router device according to claim 1 is characterized in that also having:
Under the situation of mobile router device as the standby router action,
The unit of the active router advertisement packets that reception is sent by another mobile router device, described active router advertisement packets with described another mobile router device as the described mobile router device of the message informing of active router work;
The serial number that is recorded in the binding update messages that the described active router advertisement packets of reception contains is to use the unit of described serial number when mobile router device self becomes active router.
8. mobile router device according to claim 7 is characterized in that,
Described active router advertisement packets is used the virtual router advertisement according to Virtual Router Redundancy Protocol.
9. mobile router device according to claim 7 is characterized in that,
Described active router advertisement packets is used the IPv6 router advertisement message.
10. mobile network system is characterized in that having:
A plurality of mobile router devices as claimed in claim 1;
At least one is housed in the terminal installation of described mobile router device; With
Manage the home agent apparatus that moves of described mobile router device.
11. mobile network system according to claim 10 is characterized in that,
The underlying network physical interface classification of at least one mobile router device is different with the underlying network physical interface classification of other mobile router devices.
12. mobile network system according to claim 10 is characterized in that,
In the underlying network side of each mobile router device with same virtual address, implement virtual redundancy router protocol, under as the situation of active router, use described same virtual address to communicate at mobile router device in mobile network's side.
13. mobile network system according to claim 12 is characterized in that,
As the mobile router of active router, use described same virtual address and Care-of Address to be used for carrying out the binding update messages of mobile management with the corresponding generation of described same virtual address to described home agent apparatus transmission.
14. a mobile router device, it is contained in mobile network system, and described mobile network system comprises: one or more terminal installations; The mobile network, have accommodate described terminal installation, described mobile network is connected to a plurality of mobile router devices of underlying network, described a plurality of mobile router devices comprise active router equipment and standby router equipment; And home agent apparatus is associated home address and double-address is managed with Care-of Address,
It is characterized in that,
Described mobile network moves to the second place in the underlying network from being connected to the home network that is in the primary importance in the underlying network,
When the active router that is positioned at primary importance also moves as active router after the mobile network moves to the second place, described mobile router device will with move to the second place after the corresponding Care-of Address of the described virtual address that generates be associated with described virtual address and described Care-of Address signed in to home agent apparatus, and
When if the alternate routing apparatus is determined to have lost between active router device and underlying network with being connected of underlying network, the alternate routing apparatus sends binding update messages, and this binding update messages comprises corresponding to the virtual address of described active router device with corresponding to another Care-of Address of described alternate routing apparatus.
15. mobile router device according to claim 14 is characterized in that,
Described virtual address is any one when each mobile router device that belongs to described mobile network is connected to described home network, in the employed physical address of described underlying network side physical interface.
16. mobile router device according to claim 14 is characterized in that,
In order to notify the described mobile router device of described home agent apparatus to move as described active router, in the active router advertisement packets that sends to described mobile network, contain described virtual address and the serial number of another binding update messages of sending to described home agent apparatus.
17. mobile router device according to claim 16 is characterized in that,
The employed virtual router advertisement packets of Virtual Router Redundancy Protocol that described active router advertisement packets, mobile network's side of serving as reasons at described mobile router device are implemented.
18. mobile router device according to claim 16 is characterized in that,
Described active router advertisement packets, the IPv6 router advertisement message that sends to described mobile network's side for mobile router device as the action of described active router.
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| JP2003042875 | 2003-02-20 | ||
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| CN1297662A (en) * | 1999-03-29 | 2001-05-30 | 诺基亚网络有限公司 | Arrangement for secure communication and key distribution in telecommunication system |
| JP2002290445A (en) * | 2001-03-28 | 2002-10-04 | Seiko Epson Corp | Automatic switching method for communication interface and its system |
| US20020147837A1 (en) * | 2001-04-04 | 2002-10-10 | Tantivy Communications, Inc. | Proxy mobile node capability for mobile IP |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1297662A (en) * | 1999-03-29 | 2001-05-30 | 诺基亚网络有限公司 | Arrangement for secure communication and key distribution in telecommunication system |
| JP2002290445A (en) * | 2001-03-28 | 2002-10-04 | Seiko Epson Corp | Automatic switching method for communication interface and its system |
| US20020147837A1 (en) * | 2001-04-04 | 2002-10-10 | Tantivy Communications, Inc. | Proxy mobile node capability for mobile IP |
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