CN1879425A - Arrangement in an access router for optimizing mobile router connections based on delegated network prefixes - Google Patents
Arrangement in an access router for optimizing mobile router connections based on delegated network prefixes Download PDFInfo
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Abstract
An access router of a local mobile network includes a delegation resource for delegating address prefixes and a routing resource configured for parsing reverse routing headers from received data packets. The delegation resource supplies each mobile router attaching to the local mobile network with a corresponding unique delegated address prefix within an available network prefix for use within the local mobile network. Each mobile router attached to the access router via another mobile router utilizes a reverse routing header to establish a tunnel with the access router, enabling the access router to source route messages to the mobile router via its corresponding local care-of address and next-hop addresses specified in the reverse routing header. Each mobile router creates a remote care-of address based on the delegated address prefix, minimizing the need for binding updates with the corresponding home agent as the mobile router moves within the local mobile network.
Description
Cross reference with related application
The application requires the priority of the provisional application 60/518,346 submitted on November 10th, 2003, incorporates its whole disclosures here by reference into.
Technical field
The present invention relates to by such as mobile IP network (NEMO) or the routing optimality that carries out based on the mobile router of the mobile network the mobile ad-hoc network (MANET) of Internet Protocol (IP), and the couple in router that is provided to the attachment point of the wide area network such as the internet.
Background technology
Internet engineering task group (IETF) has proposed motion at the improved mobility support based on the mobile device (for example laptop, IP phone, personal digital assistant etc.) of Internet Protocol (IP), to attempt providing the continuous connectedness based on Internet Protocol (IP).IETF has two work groups that are devoted to the mobile network: mobile ad-hoc network (MANET) work group and NEMO (mobile network), wherein MANET work group's MANET Route Selection standard of developing standard is adopted for IETF.NEMO uses mobile IP (MIP) that connectedness between mobile network and the infrastructure (as the internet) is provided.Key component among the NEMO is to represent the mobile network of its service to handle the mobile router of MIP.
Disclose " mobile IP v 6 " agreement in people's such as Johnson the Internet-Draft that is entitled as " Mobility Support in IPv6 ", this draft can obtain (incorporating its whole disclosures here by reference into) at www network address http://www.ietf.org/internet-drafts/draft-ietf-mobileip-ipv6-24 .txt place.According to people's such as Johnson saying, mobile IPv 6 protocol makes that mobile node can be from a link moving to another link, and need not to change the IP address of mobile node.Specifically, mobile node is assigned with one " home address "." home address " is the IP address of distributing in its home subnet prefixes on its home link of mobile node.When mobile node was in this locality, the destination was utilized the home link that traditional internet routing mechanism routes to mobile node for the grouping of its home address.
Mobile node also is assigned with a home agent, and this home agent is used at mobile node during away from its home link, and registering mobile node is at its any Care-of Address that uses to attachment point place of internet.Care-of Address is the IP address that is associated with the mobile node of the subnet prefix with the particular link (as foreign link) away from its home link.Home agent is that mobile node is registered the router of its current Care-of Address to it on the home link of mobile node.When mobile node during away from its home link, the destination is the grouping of the home address of mobile node on the home agent interception home link; The home agent encapsulating packets, and transmit the packet to the Care-of Address of the registration of mobile node with tunnel style.
NEMO work group has expanded to the mobile network based on such routing protocol with the feature (up to the present it is confined to the IPv6 mobile node, for example wireless laptop) of mobile IP v 6: these routing protocols make mobile router can be attached to couple in router and establish routing optimality for mobile router and the mobile network that is associated thereof.An example of the solution of the proposed routing optimality that is used for nested mobile network is open in people's such as Thubert the Internet-Draft that is entitled as " Taxonomy of Route Optimization models in the Nemo Context ", this draft can obtain at http://www.ietf.org/internet-drafts/draft-thubert-nemo-ro-taxon omy-02.txt place on the IETF website, incorporates its whole disclosures (hereinafter referred to as " Thubert-RO ") here by reference into.Particularly, Thubert-RO notices that NEMO supports mobile router to realize the mobile network by mobile IP is expanded to; How Thubert-RO in the context of MIPv6 can be adapted to NEMO with node among the optimization mobile network and the flow Route Selection between its corresponding node if having described the routing optimality of describing.
Proposed another example that is used for routing optimality discloses at people's such as Thubert the Internet-Draft that is entitled as " IPv6Reverse Routing Header and its application to Mobile Networks ", this draft can obtain at http://www.ietf.org/internet-drafts/draft-thubert-nemo-reverse-routing-header-04.txt place on the IETF website, incorporates its whole disclosures (hereinafter referred to as " Thubert-RRH ") here by reference into.Thubert-RRH discloses: utilize and eliminate the reverse Route Selection head that makes it possible to use individual tunnel to the demand in the nested tunnel between mobile router and its home agent, on the contrary between mobile router and its home agent that is associated, mobile IP can be extended to the support mobile router, and realizes nested mobile network.
A particular aspects of above-mentioned motion is that the home agent that mobile router is associated with it is communicated by letter, to guarantee the accessibility between mobile router and the wide area packet switching network (for example internet).In some cases, may wish to reduce home agent that mobile router is associated with it and establish the tunnel to have the necessity with the connectedness of wide area packet switching network.For example, in some cases, may wish that mobile router can establish anonymous route and connect, and need not the source that route connects is propagated to home agent.In some cases, may also wish when moving (i.e. " roaming ") between mobile router each service at couple in router, mobile router can be established a plurality of attached with different access router, and will each attached home agent that is notified to, especially when attached when being temporary.
Other motions attempt making the nested bottom line that reaches in tunnel by adding the operation of regulation to mobile network's top mobile router, and avoid the tunnel between mobile router and its respective home agency.An example is open in people's such as Kang the Internet-Draft that is entitled as " Route Optimization for MobileNetwork by Using Bi-directional Between Home Agent and Top Level MobileRouter ", this draft can obtain at www network address http://www.watersprings.org/pub/id/draft-hkang-nemo-ro-tlmr-00. txt place, by reference it is all incorporated into here.
Make the tunnel nested reach bottom line and avoid mobile router and its respective home agency between another example in tunnel comprise and use mobility anchor point (MAP).The variant of mobile IPv 6 protocol is open in June, 2003 people's such as Soliman the IETF Internet-Draft that is entitled as " Hierarchical Mobile IPv6mobility management (HMIPv6) ", this draft can obtain at www network address http://www.ietf.org/internet-drafts/draft-ietf-mobileip-hmipv6-08.txt place, by reference it is all incorporated into here.People's such as Soliman Internet-Draft discloses the mobility anchor point (MAP) in the IPv6 network, and it is by realizing HMIPv6 for the mobile node in its field, address regional assignment of care-of-addresses.Thereby mobile node can be used for Care-of Address on the link communication in the field, address of MAP, and regional Care-of Address is used for IPv6 communication outside the field, MAP address.Like this, MAP serves as local home agent.
Thereby mobile node can be addressed by its " home address " all the time: no matter the current attachment point to the internet of mobile node how, can use this address to route the packet to mobile node.Mobile node can also continue to communicate by letter with other nodes (static or move) after moving to new link.Thereby mobile node leaves its home link for transport layer and upper-layer protocol and to use be transparent more.But as what can find out from preamble, people such as Soliman are confined to mobile node, do not describe in the mode that can be applied to the mobile network who is served by mobile router HMIP to be used for mobile router.But, routing optimality is described in people's such as Ohnishi the Internet-Draft that is entitled as " HMIP basedRoute Optimization Method in a Mobile Network " to some extent, this draft can obtain at http://www.ietf.org/internet-drafts/draft-ohnishi-nemo-ro-hmip-00.txt place on the IETF website, incorporates its whole disclosures here by reference into.
What cherish a special interest is to describe the motion of using prefix delegation (delegation), for example DHCP (DHCP): DHCP is being described as being entitled as in " Dynamic Host Configuration Protocol for IPv6 (DHCPv6) " of people such as Droms of request note (RFC) 3315 issues to some extent by IETF, and this RFC can obtain (incorporating its whole disclosures here by reference into) at www network address http://www.ieft.org/rfc/rfc3315.txt place.Prefix delegation among the DHCP is being described as being entitled as in " IPv6 Prefix Options for Dynamic Host Configuration Protocol (DHCP) version 6 " of people such as Troan of RFC 3633 issues to some extent by IETF, and this RFC can obtain (incorporating its whole disclosures here by reference into) in http://www.ietf.org/rfc/rfc3633.txt place on the IETF website.
Particularly, people's such as Lee the Internet-Draft that is entitled as " Route Optimization for Mobile Nodes inMobile Network based on Prefix Delegation " discloses the couple in router of prefix delegation being given top mobile router, and this draft can obtain (incorporating its whole disclosures here by reference into) in http://www.ietf.org/internet-drafts/draft-leekj-nemo-ro-pd-02.t xt place on the IETF website.
Fig. 1 and Fig. 2 are the figure from the above people's such as Lee that incorporate into Internet-Draft.Fig. 1 illustrates network 10, and it has and is attached to its home agent 14a separately and mobile router 12a and the 12b of 14b.In Fig. 1, home agent 14a and 14b provide the attachment point between corresponding mobile router one 2a and 12b and the internet 16 separately, thereby make mobile node 18 to communicate by letter with corresponding node 20.IPv6 addressing agreement according to appointment among the RFC 3513, among home agent 14a and the 14b each has corresponding home address prefix: home agent " HA-MR1 " 14a home address prefix 22a is " 1:: ", the home address prefix 22b of home agent " MA-MR2 " 14b is " 2:: ", and this RFC can obtain (incorporating its whole disclosures here by reference into) at http://www.ietf.org/rfc/rfc3513 place on the internet.Thereby mobile router " MR1 " 12a and " MR2 " 12b are equipped with mobile network's prefix 24a and the 24b that has value " 1:1:: " and " 2:1:: " respectively by their home agent 14a and 14b branches separately.Therefore, mobile network's prefix 24a that mobile router 12a and 12b will be separately and 24b declare the attached nodes 18 to separately, therefore form mobile network 30a and 30b.Fig. 1 also illustrates the couple in router 26 with corresponding local network 42, and this local network 42 is also referred to as interviewed network here, the network prefix 28 of its value of having for " 3:: ".
Fig. 2 illustrate based on mobile router 12a and 12b leave its separately home agent 14a and 14b and with the attached amended network topology 10 of couple in router 26 '.As shown in Figure 2, each mobile router (for example 12a and 12b) has the home address (HoA) (for example 34a, 34b) based on its corresponding home address prefix (for example 22a, 22b): the home address 34a of mobile router (MR1) 12a has the interior value " 1::1 " of address space of home address prefix 22a " 1:: ", and the home address 34b of mobile router (MR2) 12b has the interior value " 2::3 " of address space of home address prefix 22b " 2:: ".
According to people's such as Lee Internet-Draft, mobile router 12a detects and moves, and according to delegated prefix with value " 3:1:: " (DP) 32a of the acquisition of the prefix delegation agreement such as DHCPv6 from couple in router 26.Mobile router 12a to the test example that moves as based on the forfeiture of the connectedness of detected and home agent 14a, detect from the router advertisement message of couple in router 26 and be attached to couple in router 26.In response to receiving delegated prefix 32a, Care-of Address (CoA) 36a in the mobile router 12a building network prefix 28, and the Binding Update of execution and its home agent 14a can arrive via Care-of Address 36a so that home agent 14a can identify the home address 24a of mobile router 12a.
In response to the distribution of delegated prefix 32a, mobile router 12a also utilizes the router advertisement message of the delegated prefix option output propaganda delegated prefix 32a of regulation.Notice that mobile router 12a also exports the router advertisement message of its mobile network's prefix of propaganda 24a.In response, second mobile router (MR2) 12b is attached to mobile router 12a, and obtain sub-delegated prefix 32b from mobile router 12a, this sub-delegated prefix 32b has value " 3:1:1:: ", and is in the address space of the delegated prefix 32a that distributes to mobile router 12a " 3:1:: ".
The mobile router 12b that has been attached to mobile router 12a obtains Care-of Address (CoA2) 36b based on mobile network's prefix 24a (based on the router advertisement message of specifying MNP 24a), and obtains Care-of Address (CoAl) 36c based on delegated prefix 32a (based on the router advertisement message of specifying DP 32a).Mobile router 12b selects Care-of Address 36c, carry out Binding Update so that Care-of Address 36c is notified to home agent 14b, and its sub-delegated prefix 32b is propagated to attached nodes 18b, and attached nodes 18 is established its Care-of Address 36d and 36e separately in response.Be also noted that the visit mobile node that is attached to mobile router 12b also makes up Care-of Address 36f (" 2:1::9 ") based on the router advertisement message from the mobile router 12b that specifies MNP 24b.
But the prefix delegation of being undertaken by mobile router 12a among Fig. 2 has following shortcoming: sub-delegated prefix 32b is limited in limited in the address space of delegated prefix 32a of mobile router 12a mobile router 12b with couple in router 26 as the flexibility of in the interviewed network 42 of the attachment point of internet 16, moving.Particularly, the prefix delegation that mobile router 12a carries out can't provide inner mobility in the nested network topology under the mobile router 12a 40: if any mobile router (for example 12a, 12b) changes the attachment point that it is provided by couple in router 26 in visited network 42, then mobile router must renumber its all delegated prefix.
Consider that mobile router 12b is with its attached example that changes to couple in router 26 from mobile router 12a: mobile router 12b will need to stop using sub-delegated prefix 32b, because it conflicts mutually with the delegated prefix 32a that distributes to mobile router 12a.Thereby mobile router 12b will need to obtain new delegated prefix (for example " 3:2:: ") from couple in router 26.In addition, in case mobile router 12b determines that it no longer is attached to mobile router 12a, mobile router 12b will need to propagate its mobile network's prefix 24b, and to remain on the connectedness in its mobile network 30b, this no longer is effective (can reach) prefix because of delegated prefix 32a and 32b.Thereby unknown visit mobile node can make up Care-of Address 36f based on MNP 24b, thereby the identity of mobile router 12b may be exposed to unknown visit mobile node.
In addition, suppose that mobile router 12a is with its attached mobile router 12b that is attached to couple in router 26 now that changes to from couple in router 26, then mobile router 12a will need to stop using its delegated prefix 32a, and this is because it is outside the address space of the new delegated prefix (" 3:2:: ") of mobile router 12b.
In addition, attached for each, mobile router 12a and 12b need repeat with its separately home agent 14a and the Binding Update of 14b, this be because in amended network topology previous delegated prefix no longer share.
Summary of the invention
Need a kind of like this layout, it makes mobile router to move pellucidly having to be configured in attached mobile router is distributed the interviewed network of couple in router of delegated prefix, and need not redistributing and that cause thus and Binding Update home agent of address prefix.
Also need a kind of like this layout, it makes the mobile router in the accessed mobile network to provide the fail safe and the anonymity of increase by propagating delegated prefix to the visit mobile node, and need not to propagate the mobile network's prefix that is associated with its home network separately.
The present invention has satisfied these and other demands, in the present invention, a kind of local mobile network's couple in router comprises the delegation resource that is used for delegated address prefix and is configured for the Route Selection resource of parsing from the reverse Route Selection head of the packet that receives.The corresponding unique delegated address prefix of delegation resource in each mobile router that is attached to local mobile network is provided for available network prefix in the local mobile network.The reverse Route Selection head of each mobile router utilization that is attached to couple in router via another mobile router is established the tunnel with couple in router, thereby makes couple in router to send source routing message to mobile router via its corresponding local Care-of Address and the next hop address of appointment in the reverse Route Selection head.Each mobile router is created remote care-of address based on delegated address prefix, thereby makes that when mobile router is mobile in local mobile network pair acting on behalf of the demand of carrying out Binding Update with respective home reaches minimum.In addition, mobile router can keep the confidentiality of its home network prefix simultaneously to other mobile node propaganda delegated prefix, and the confidentiality that is attached to the visit mobile node of mobile router by the delegated prefix of utilizing Care-of Address.
One aspect of the present invention provides the method in a kind of couple in router.This method comprises based on first mobile router provides delegated address prefix to couple in router and the attached of one of second mobile router that is attached to couple in router to first mobile router.Each mobile router among the local mobile network who is served by couple in router receives the corresponding unique delegated address prefix that is used in the local mobile network.This method also comprises the remote care-of address that has delegated address prefix to the home agent registration of the regulation of first mobile router, to register the accessibility of first mobile router.When mobile router was mobile in local mobile network, unique delegated address prefix made each mobile router can use this delegated address prefix, no matter and whether mobile router changes its attachment point.Unique delegated address prefix also makes couple in router be corresponding mobile router establishment fail safe and traffic policy separately.In addition, registration with remote care-of address of delegated address prefix makes home agent can keep the connectedness with first mobile router, this is that couple in router will be safeguarded the reachability information of delegated address prefix because when first mobile router is mobile in whole local mobile network.
Another aspect of the present invention provides the method in a kind of mobile router.This method comprises the router advertisement message of detection by second mobile router output of the attachment router of serving as mobile router.This router advertisement message has prefix option and tree information option, prefix option is specified first network prefix in the local mobile network who is used for being served by second mobile router, and the tree information option is specified the couple in router that serves as top router and be configured to be used to provide the trust router of delegated address prefix.This method also comprises based on first network prefix and generates local Care-of Address, and output is to via the request of second mobile router from the delegated prefix of couple in router.The delegated prefix that reception is distributed by couple in router, wherein delegated prefix is different from first network prefix.This method also is included on the inbound link of mobile router and propagates delegated prefix.
More advantages of the present invention and novel feature part will be set forth in the following description, and part will obviously be found out by the those skilled in the art who consults hereinafter, perhaps can know by putting into practice the present invention.Advantage of the present invention can realize with combination by the means of especially pointing out in claims and obtain.
Description of drawings
With reference to the accompanying drawings, the element that wherein has same numeral in all figure is represented similar elements, in the accompanying drawing:
Fig. 1 is (prior art) figure of the network topology of the mobile router in the home network that is illustrated in separately.
Fig. 2 is (prior art) figure that the network topology of the nested mobile router with nested prefix in the interviewed network is shown.
Fig. 3 A and Fig. 3 B be illustrate according to the embodiment of the invention based on the couple in router that serves as attachment point in the interviewed network to its distribution and when in interviewed network, moving, have the figure of the mobile router of continuous delegated prefix;
Fig. 4 is the figure that is shown specifically according to the couple in router of Fig. 3 A of the embodiment of the invention and 3B.
Fig. 5 is the figure that is shown specifically according to the attached mobile router of the router advertisement message of being exported by couple in router of the embodiment of the invention and Fig. 3 A and Fig. 3 B.
Fig. 6 is the figure that is shown specifically according to one of Fig. 3 A of the embodiment of the invention and mobile router of Fig. 3 B.
Fig. 7 illustrates according to the mobile router of Fig. 3 A of the embodiment of the invention and Fig. 3 B figure to the processing of reverse Route Selection head.
Fig. 8 A and Fig. 8 B illustrate according to Fig. 3 A of the embodiment of the invention and couple in router and the mobile router of Fig. 3 B to establish the figure of the method for unique delegated prefix for each mobile router.
Embodiment
Fig. 3 A and Fig. 3 B be illustrate network topology 50,50 according to the embodiment of the invention ' and 50 " figure, these network topologies based on couple in router (AR) 52 via fixedly connected 51 connectednesses that are provided for roaming mobile router 54a, 54b and 54c in local mobile network 56.Couple in router 52 is configured to carry out the operation based on NEMO, and is as described below.Particularly, couple in router 52 is selected the available network prefix 58 (for example " 3:: ") for mobile router 54a, 54b and 54c use.Notice that in fact couple in router 52 may have other network prefixs that it is reserved for cable network, dedicated network etc.
Couple in router 52 output router advertisement message, this router advertisement message comprises prefix option and tree information option, this prefix option is specified and is supplied mobile router 54a, 54b and 54c to be used as the available network prefix 58 (for example " 3:: ") of attachment point.Couple in router 52 is also to wide area network 16 propagandas: the available network prefix 58 with value " 3:: " can reach via couple in router 52 overall situations.
Fig. 3 A also illustrates in response to mobile router 54b and becomes and be attached to couple in router 52 from being attached to mobile router 54a, local mobile network's 56 topology 50 to topology 50 ' transformation 66a.Fig. 3 B illustrates in response to mobile router 54a and becomes and be attached to mobile router 54b from being attached to couple in router 52, local mobile network's 56 topology 50 ' to topology 50 " transformation 66b.
As described below, couple in router 52 is configured in case carry out initial registration with couple in router 52, just distribute corresponding unique delegated address prefix 60a, 60b and 60c to each mobile router 54a, 54b and 54c, thereby make mobile router in whole local mobile network 56, to move, and need not to redistribute delegated address prefix. Delegated prefix 60a, 60b and 60c choose from the gathering of the available network prefix 58 of couple in router.Thereby, have value " 3:1:: " separately, delegated prefix 60a, 60b and the 60c of " 3:2:: " and " 3:3:: " is in the address space of the available network prefix 58 with value " 3:: ".
In addition, couple in router 52 is configured for and serves as the mobile IP home agent of supporting reverse Route Selection header operations, thereby makes mobile router 12a, 12b and 12c can utilize separately tunnel to local Care-of Address (LCoA) 62a, 62b and the 62c of couple in router 52 registration its values of having " 3::1 ", " 3:1::1 " and " 3:2::4 ".Each tunnel can also have corresponding security association, thereby makes couple in router 52 and corresponding mobile router five 4a, 54b or 54c keep privacy.Notice that because mobile router 54a and couple in router 52 shared links (promptly being directly connected to couple in router 52), therefore oppositely the use of Route Selection head is optionally, but still can use the tunnel with security association.
Thereby, couple in router 52 can be maintained as the banding cache that each mobile router is specified delegated network prefixes (for example 60a, 60b, 60c), local Care-of Address (for example 62a, 62b and 62c) and source routing head, and wherein this source routing head is specified the hop-by-hop path that goes to corresponding local Care-of Address.
Shown in Fig. 3 A and Fig. 3 B, each mobile router 54a, 54b and 54c also keep its corresponding former mobile network's prefix 24a, 24b, the 24c (being original mobile network's prefix) by its corresponding home agent 63 distribution.For example, mobile router 54a (MR1) and mobile router 54c (MR3) have original mobile network's prefix 24a (" 1:1:: ") separately and the 24c (" 1:2:: ") that is distributed by the home agent 63a (HA1) with respective home prefix 22a (" 1:: "); Mobile router 54b (MR2) has the original mobile network's prefix 24b (" 2:1:: ") that is distributed by the home agent 63b (HA2) with respective home prefix 22b (" 2:: ").
But, the distribution of delegated network prefixes (for example 60a, 60b, 60c) makes mobile router (for example 54a, 54b, 54c) can utilize its corresponding delegated network prefixes (for example 60a, 60b, 60c) to establish and safeguard the mobile network, thereby eliminated necessity that mobile router (for example 54a, 54b, 54c) is propagated its original mobile network's prefix (for example 24,24b, 24c).
In addition, each among mobile router 54a, 54b and the 54c is configured for from its corresponding delegated prefix 60a, 60b and 60c and selects corresponding ownership Care-of Address (being also referred to as remote care-of address (RcoA)) 64a, 64b and 64c.In case mobile router 54a, 54b and 54c have selected ownership Care-of Address 64a, 64b and 64c separately, mobile router just can send Binding Update to its home agent (for example 63a or 63b) separately, is to arrive via its remote care-of address 64a, 64b and 64c separately to specify mobile router (can be identified by its home address H1, H2, H3 separately). Mobile router 54a, 54b and 54c can also send its original mobile network's prefix 24a, 24b and 24c separately of appointment can be via the binding update messages of remote care-of address 64a, 64b and 64c arrival.
In response, home agent upgrades its banding cache clauses and subclauses, with the home address (for example H1, H2, H3) of specifying mobile router 54a, 54b and 54c with and separately original mobile network's prefix 24a, 24b and 24c can arrive via separately delegated prefix 60a, 60b and remote care-of address 64a separately, 64b in the 60c and 64c.Because each delegated prefix is in the available network prefix 58 of couple in router 52 of advertisement on the internet 16, so home agent (k is 63a or 63b for example) can be safeguarded accessibility with its mobile router (for example 54a, 54b, 54c) via corresponding ownership Care-of Address (64a, 64b, 64c).Thereby home agent (for example 63a or 63b) can forward a packet to remote care-of address 64a, 64b and 64c via what couple in router 52 will want to go to home address (for example H1, H2, H3).
Couple in router 52 is safeguarded the banding cache of delegated prefix (for example 60a, 60b, 60c) based on corresponding local Care-of Address (for example 62a, 62b, 62c).Each mobile router (for example 54a, 54b, 54c) sends the banding cache updating message in response to the new attachment point of establishing among the local mobile network 56 to couple in router, is can be via the local Care-of Address of establishing based on new attachment point (62a, 62b, 62 ' b, the 62c among Fig. 3 A for example to specify mobile router (for example 54a, 54b and 54c) and corresponding delegated network prefixes (for example 60a, 60b and 60c) thereof; 62a among Fig. 3 B, 62 ' a, 62 ' b and 62c) arrive.
Thereby, couple in router 52 is by transmitting 16 that receive via the internet, as to want to go to mobile router grouping based on its ownership Care-of Address (for example 64a, 64b, 64c), perhaps based on upgrade its banding cache clauses and subclauses of specifying local Care-of Address (for example 62a, 62b, 62c) transmit 16 that receive via the internet, go to the grouping of its corresponding original mobile network's prefix (for example 24a, 24b, 24c) mutually, coming provides accessibility for each mobile router (for example 54a, 54b, 54c).
For example, Fig. 3 A illustrates mobile router 54b and leaves mobile router 54a, and directly is attached to couple in router 52, thus generation topology 50 '.Mobile router 54b is based on the router advertisement message that detects from the appointment available network prefix 58 " 3:: " of couple in router 52, and the new Care-of Address 62 ' b that has value " 3::2 " by establishment is attached to couple in router 52.Mobile router 54b sends binding update messages to couple in router 52, is notified to couple in router 52 with the new local Care-of Address 62 ' b that will replace former Care-of Address 62b.But remote care-of address 64b is constant, and this is because mobile router 54b continues to use its delegated address prefix 60b.
Similarly, Fig. 3 B shows mobile router 54b and leaves couple in router 52, and is attached to mobile router 54b, thereby produces topology 50 ".Mobile router 54a can be " 3:2:: " from the delegated network prefixes 60b of mobile router 54b acquisition based on the appointment that detects from mobile router 54b, new Care-of Address 62 ' a by establishment has value " 3:2::2 " is attached to mobile router 54b.Mobile router 54a sends binding update messages to couple in router 52, is notified to couple in router 52 with the new local Care-of Address 62 ' a that will replace former Care-of Address 62a.But remote care-of address 64a is constant, and this is because mobile router 54a continues to use its delegated address prefix 60a.
Thereby, no matter whether shown in Fig. 3 A and Fig. 3 B change in topology takes place, during mobile router is roamed in local mobile network 56, only need to carry out following steps once: send the remote care-of address (for example 64a, 64b, 64c) of Binding Update to register corresponding mobile router (for example 54a, 54b and 54c) to home agent (for example 63a or 63b).
Fig. 4 is the block diagram that illustrates according to the couple in router 52 of the embodiment of the invention.Couple in router 52 comprises DHCPv6 delegation resource 70, and it is configured for delegated prefix, described in the Internet-Draft that the Troan that incorporates into as mentioned etc. is.As described below, delegation resource 70 is configured for to each mobile router (for example 54a, 54b, 54c) corresponding delegated address prefix (for example 60a, 60b and 60c) is provided, wherein each in the delegated address prefix (for example 60a, 60b and 60c) is within the address space of available network prefix 58, thereby makes delegated address prefix can be used in the whole local mobile network 56.
Couple in router 52 also comprises Route Selection resource 72, and this Route Selection resource 72 comprises router advertisement resource 74, routing table 76 and reverse Route Selection head (RRH) resource 70.Routing table is configured for a plurality of banding cache clauses and subclauses 80 of storage.Each banding cache clauses and subclauses (for example 80a, 80b, 80c) are configured to corresponding delegated address prefix (for example 60a, 60b and 60c) or corresponding mobile router (for example 54a, 54b, 54c) storage corresponding local Care-of Address (for example 62a, 62b, 62c).But, clearly,, can store different clauses and subclauses for each mobile router and each delegated prefix 80, this depends on the implementation of routing table 76.
Oppositely Route Selection header resource 78 is configured for reverse Route Selection header functionality is provided, and serves as endpoint of a tunnel to use mobile router termination tunnel, described in the above Thubert-RRH Internet-Draft of incorporating into.Particularly, oppositely Route Selection header resource 78 is configured for based on the continuous next hop address of appointment in the reverse Route Selection head of the message that receives and establishes the source routing that arrives corresponding local Care-of Address 62.Oppositely the Route Selection head is described with reference to figure 7 hereinafter.
Fig. 5 illustrates according to the figure of the embodiment of the invention by the router advertisement message 82 of router advertisement resource 74 outputs.Router advertisement message 82 comprises according to the pressure router advertisement part 84 of title for the RFC 2461 of " Neighbor Discoveryfor IP Version 6 (IPv6) ", this RFC can obtain at http://www.ietf.org/rfc/rfc2461.txt place on the IETF website, by reference it is all incorporated into here.Router advertisement message 82 also comprises the prefix option part 86 according to the 4.6.2 of RFC 2461 joint, and according to the tree information option part 88 of the above Thubert-RRH Internet-Draft of incorporating into.
Tree information option part 88 is used to identify the characteristic of the tree that is formed by the couple in router 52 that serves as top mobile router.Particularly, tree information option part 88 comprise option type field 90b (" 10 "), specify the regulation preference value of corresponding tree preference field 95, specify depth field 96, woodlot group field 98 and flag bit 100a, 100b and the 100c of the jumping figure of the top mobile router (TLMR) that goes to appointment in the TLMR field 97.TLMR field 97 is specified the global I Pv6 address of the router that sends router advertisement message 82 (for example 52,54a, 54b, 54c).Woodlot group field 98 is specified the IPv6 global address (being provided with by TLMR 52) that is used to identify tree (for example network topology 50 comprise based on from the single tree that be linked in sequence of router five 4c to 54b to 54a to 53).
It is fixing mobile routers that flag bit 100a (F=1) is used to specify couple in router 52.Flag bit 100b (H=1) is used to specify couple in router 52 to serve as home agent, and flag bit 100a (D=1) is used to specify couple in router 52 to be configured for to serve as and entrusts router (DR), this trusts router to be configured for according to DHCPv6 agreement execution prefix delegation (PD).Thereby couple in router 52 is entrusted router (DHCPv6-PD DR) with its DHCPv6 that oneself propagates to being used for prefix delegation.
Fig. 6 is the figure that illustrates according to the mobile router 54 of the embodiment of the invention.Mobile router 54 comprises that outlet connects 140, ingress interface 142 and Route Selection resource 144, and this Route Selection resource 144 comprises router advertisement resource 74 and mobility (NEMO) resource 146.Ingress interface 142 is configured for: attached based on couple in router 52 and any other intermediate router receives the data traffic from attached node, and forwards the traffic to internet 16 via discharge coupling 140.Ingress interface 142 also is configured for the router advertisement message 82 that output is generated by router advertisement resource 74.
Mobility resource 146 comprises that the address generates resource 148, reverse Route Selection header resource 78 and defer to the prefix request resource 150 of DHCPv6, and this prefix request resource 150 is served as according to the mutual DHCPv6 client of RFC3633 and DHCPv6 delegation resource 70.Below more details will be described.
Fig. 7 be illustrate according to more than the figure of the reverse Route Selection head that generates by the RRH resource in the mobile router of the Thubert-RRH draft incorporated into.Particularly, Fig. 7 illustrates by having reverse Route Selection head 190a, 190b that topology 50 the mobile router 54c that makes a start, middle mobile router 54b and mobile router 54a carry out respectively and the renewal of 190c.Particularly, Fig. 7 illustrates grouping 101, and this grouping 101 has source address field 102, destination address field 104, extended head 106, reverse Route Selection head (for example 190a) and divide into groups 108 request of delegated address prefix (for example to) by the inside that the source of making a start (for example mobile router 54c) generates.
Described in the above Thubert-RRH that incorporates into, output has the grouping 101 of the source address field 102 of the Care-of Address 112c (MR3LCoA) that specifies mobile router 54c as the mobile router 54c of the mobile router of making a start, and the reverse address blank time slot 114 of the selected number in the Route Selection head 190a.Empty slot makes router five 4b and 54c its Care-of Address separately can be stored in (for example in reverse Route Selection head or source address field 102) in the IPv6 head.
Particularly, the RRH resource 78 of mobile router 54c resource 43 is inserted the regulation home address 116 (MR3_Haddr) (or being used for the anonymous another name that connects) of mobile router 54c in first time slot (slot0), and specified type is the Route Selection head of " 4 " in type field 118.RRH resource 78 is inserted the Care-of Address 112c of mobile router 54c in source address field 102, and inserts the address 120 (AR) of corresponding couple in router 52 in destination address field 104, and will divide into groups 101 to output to its attachment router 54b.
Couple in router 52 reads the home address of bottom entries 116 with identification mobile router 54c, when identification it to the occupation mode of these clauses and subclauses just look like these clauses and subclauses are mobile IP v 6 home address destination option the same (being about to it) as the index that enters banding cache.Now, couple in router 52 can directly send it back grouping via the tunnel by reverse Route Selection head 190c and source address field 102 are used to make up source routing selection head.
Fig. 8 A and Fig. 8 B illustrate the figure that address prefix is entrusted to mobile router 54 according to embodiment of the invention couple in router 52.Here the step of describing with reference to figure 8A and Fig. 8 B can be implemented in separately the mobile node and is embodied as the executable code of propagating via computer-readable transmission medium (for example optical cable, conduction transmission line medium, wireless electromagnetic medium etc.) that is stored on the computer-readable medium (for example floppy disk, hard disk, EEPROM, CD-ROM or the like).
This method starts from step 200, the router advertisement resource 74 output router advertisement message of couple in router 52 in this step, this message comprises prefix option 86 and tree information option 88, this prefix option 86 is specified has the available network prefix (P) 58 of value " 3:: ", and it is the fixing top mobile routers (TLMR) with NEMO ability that can carry out prefix delegation that this tree information option 88 is specified couple in router 52.In response to detecting router advertisement message, in step 202, mobile router 54a is by disposing its local Care-of Address 62a based on the prefix of being propagated 58, send the request of delegated prefix (DP1) 60a and receiving propaganda delegated prefix 60a on its ingress port 142 at that time to couple in router 52, thereby be attached to couple in router 52.Particularly, the router advertisement message 82 that mobile router 54a is exported is specified delegated prefix 60a in the prefix part 94 of prefix option 86, and suitable prefix length is specified in length field 92; Tree information option 88 is identical with the tree information option that couple in router 52 is exported, and only mobile router 54a has increased " 1 " with depth field 96, jumps with indication mobile router 54a and TLMR distance one.As mentioned above, mobile router 54a does not need to utilize reverse Route Selection head, and this is because it directly is attached to couple in router 52.Mobile router 54a also sends Binding Update to its home agent 63a (HA1), can arrive via remote care-of address 64a (" 3:1::1 ") to specify mobile router 54a (can be identified by its home address H1) and/or its corresponding original mobile network's prefix 24a (" 1:1:: ").
In step 204, the Route Selection resource 144 of mobile router 54b detects the router advertisement message 82 that is received from mobile router 54a by discharge coupling 140, and this router advertisement message 82 is specified delegated prefix 60a and tree information option 88.In response to detecting tree information option 88, mobility resource 146 is analytic tree information option 88 in step 206, and detects the 100c that puts in place and be set, thereby specifies the couple in router 52 as top mobile router to be configured to entrust router.In response, in step 208, the address generates resource 148 by making up local Care-of Address 62b based on delegated prefix 60a (DP1), causes mobile router 54b to be attached to mobile router 54a.
In step 210, mobile router 54b generates grouping.This grouping comprises DHCPv6 request 108 that is generated by request resource 150 and the reverse Route Selection head 190 that is generated by RRH resource 78.Route Selection resource 72 is added its local Care-of Address 62b in the source address field 102 to, and the address 120 of couple in router 52 added in the destination address field 104, this destination address field 104 is by obtaining in the TLMR identifier 97 of mobility resource 146 from tree information option 88.
In step 212, the delegation resource 70 in the couple in router 52 receives delegated prefix request and attached RRH 190.In step 214, in response, delegation resource 70 is distributed delegated prefix 60b (DP2), and upgrades its banding cache clauses and subclauses 80b, can arrive via local Care-of Address 62b to specify delegated prefix 60b and mobile router 54b; Route Selection resource 72 is also stored reverse Route Selection head with the form of the source router clauses and subclauses of local Care-of Address 62b, can arrive via the source routing that generates from reverse Route Selection head to specify local Care-of Address 62b.
In step 216, delegation resource 70 utilizes the source routing that obtains from reverse Route Selection head that delegated prefix 60b is sent to mobile router 54b.
Receive delegated prefix 60b in response to DHCPv6 client 150, in step 218, Care-of Address generates interior remote care-of address (R-CoA) 64b of address space that resource 148 is chosen in delegated prefix 60b.In step 220, the router advertisement resource 74 among the mobile router 54b is propagated delegated prefix 60b on its ingress interface 142.
In step 222, the mobility resource 146 of mobile router 54b uses its inner Binding Update resource (not shown) to come to send the Binding Update that has reverse Route Selection head to its home agent 63b (HA2), can arrive via remote care-of address 64b to specify mobile router 54b (can be identified by its home address H2) and/or its original mobile network's prefix 24b (MNP2) that has value " 2:1:: " accordingly.In step 224, the reverse Route Selection header resource 78 of couple in router 52 is come the termination tunnel by divesting reverse Route Selection header fields 190, its relevant the returning of Care-of Address value 62b of the appointment source routing of mobile router 54b of making a start in storage simultaneously and the reverse Route Selection head; Couple in router 52 adds its oneself address in the source address field 102 to, and binding update messages is forwarded to home agent 63b in step 226.
Fig. 8 B illustrates the figure that changes 66a and Fig. 3 A, and wherein mobile router 54b directly is attached to couple in router 52.In step 230, mobile router 54b detects the router advertisement message 82 from the specified prefix (P) 58 of couple in router 52 and tree information option 88.In step 232, it is top mobile routers that mobility resource 146 detects couple in router 52, and flag bit 100c to be set with indication couple in router 52 be to entrust router.In step 234, the Care-of Address among the mobile router 54b generates resource 148 and is attached to couple in router 52 by new Care-of Address 62 ' b (" 3::2 ") that generation is positioned at the address space of the available network prefix of being propagated by couple in router 52 58.In step 236, the binding update messages that the mobility resource 146 of mobile router 54b generates at couple in router 52, this message is specified new local Care-of Address 62 ' b.Receive binding update messages in response to the Route Selection resource 72 in the couple in router in step 238 52, in step 240, Route Selection resource 72 is upgraded banding cache clauses and subclauses 80b, can arrive via the new local Care-of Address 62 ' b with value " 3::2 " to specify mobile router 54b and delegated prefix 60b.In step 242, Route Selection resource 72 sends it back mobile router 54b with binding acknowledgement.
According to the disclosed embodiments, the NEMO routing optimality can be applied to the roaming mobile router in the interviewed network, follows the basic Nemo agreement outside the nested structure simultaneously.
In addition, because mobile router only need propagate delegated prefix in the clear, therefore just make its home address prefix keep to keep secret with regard to the secret for the couple in router of not trusted or visit mobile node.Thereby in case realize RFC 3041 in each node, mobile router and couple in router (and local mobile node) just can be anonymous each other.
In addition, couple in router can place particular category with the mobile router flow, thereby interviewed couple in router can be strengthened the fail safe of himself, and prevents to visit mobile router and too utilize its resource.
At last, when moving in the local mobile network of mobile router at couple in router, protected the long distance registration to home agent, this makes couple in router can limit access.
Notice that oppositely the use of Route Selection head has been optimized communication by the nested tunnel of eliminating between mobile router and the couple in router; But,, then can omit the use of reverse Route Selection head if be cost to utilize nested tunnel.
In addition, be easy to find out that the disclosed embodiments can be applied to the mobile router that can be attached to attachment router of any number.
Think that at present the most practical and preferred embodiment have described the disclosed embodiments though got in touch, but be appreciated that, the present invention is not limited to the disclosed embodiments, but opposite, wants to cover various modifications and the equivalent arrangements that comprises in the spirit and scope of appended claims.
Claims (52)
1. the method in the couple in router, this method comprises:
Based on first mobile router to described couple in router be attached in second mobile router of described couple in router one attached, provide delegated address prefix to described first mobile router, each mobile router among the local mobile network who is served by described couple in router receives unique delegated address prefix of using accordingly in described local mobile network; And
Has the remote care-of address of described delegated address prefix to the home agent registration of the regulation of described first mobile router, to register the accessibility of described first mobile router.
2. the method for claim 1, comprise that also output has the router advertisement message of prefix option and tree information option, described prefix option is specified the available network prefix that is used in the described local mobile network, and it is top router and the trust router that is configured to be used to provide described delegated address prefix that described tree information option is specified described couple in router.
3. method as claimed in claim 2, the wherein said step that provides comprises:
Reception is from the request to described delegated address prefix of described first mobile router, this request comprises the reverse Route Selection head of specifying the path of going to described first mobile router, this reverse Route Selection head comprises the interior local Care-of Address of address space of described available network prefix, and described request also comprises first source address field of jumping of specifying described path;
Can upgrade the banding cache clauses and subclauses via the delegated address prefix that described local Care-of Address arrives by utilizing, come the gathering of the prefix in described available network prefix, described delegated address prefix is distributed to described first mobile router; And
In the grouping that comprises the source routing head of specifying described path, the delegated address prefix that will be used for described first mobile router sends to first of described path and jumps.
4. method as claimed in claim 3, wherein said second mobile router is assigned with second delegated address prefix, this second delegated address prefix is different from described delegated address prefix and is in the address space of described available network prefix, and described local Care-of Address is in the address space of described second delegated address prefix.
5. method as claimed in claim 4, wherein said registration step comprises binding update messages is forwarded to the home agent of described regulation from described first mobile router, described binding update messages specify described first mobile router and distribute to by described home agent in original mobile network's prefix of described first mobile router at least one can arrive via described remote care-of address.
6. method as claimed in claim 5, wherein said forwarding step comprises:
From described binding update messages, remove described reverse Route Selection head, and the described local Care-of Address of storage is to arrive via first path of jumping that comprises described path in the banding cache clauses and subclauses,
In the source address field of described binding update messages, insert the address of described couple in router, and
The described binding update messages that does not have described reverse Route Selection head is forwarded to the home agent of described regulation.
7. method as claimed in claim 4 also comprises:
Reception is from second binding update messages of described first mobile router, this second binding update messages is specified in the address space that is in described available network prefix and is different from the second local Care-of Address of described second delegated address prefix, and described second Binding Update replaces described local Care-of Address; And
Utilization can be upgraded described banding cache clauses and subclauses via described delegated address prefix and described first mobile router that the described second local Care-of Address arrives.
8. the method for claim 1 comprises that also the output appointment is used for the router advertisement message of the available network prefix in the described local mobile network, and wherein:
Described second mobile router is assigned with second delegated address prefix, this second delegated address prefix is different from described delegated address prefix and is in the address space of described available network prefix, and described local Care-of Address is in the address space of described second delegated address prefix.
9. method as claimed in claim 8, wherein said registration step comprises binding update messages is forwarded to the home agent of described regulation from described first mobile router, described binding update messages specify described first mobile router and distribute to by described home agent in original mobile network's prefix of described first mobile router at least one can arrive via described remote care-of address.
10. method as claimed in claim 9, wherein said forwarding step comprises:
From described binding update messages, remove described reverse Route Selection head, and the described local Care-of Address of storage is to arrive via first path of jumping that comprises described path in the banding cache clauses and subclauses,
In the source address field of described binding update messages, insert the address of described couple in router, and
The described binding update messages that does not have described reverse Route Selection head is forwarded to the home agent of described regulation.
11. the method in the mobile router, this method comprises:
Detection is by the router advertisement message of second mobile router output of the attachment router of serving as described mobile router, this router advertisement message has prefix option and tree information option, described prefix option is specified first network prefix in the local mobile network who is used for being served by described second mobile router, and described tree information option is specified the couple in router that serves as top router and be configured to be used to provide the trust router of delegated address prefix;
Generate local Care-of Address based on described first network prefix;
Output is to via the request of described second mobile router from the delegated prefix of described couple in router;
The described delegated prefix that reception is distributed by described couple in router, described delegated prefix is different from described first network prefix; And
The described delegated prefix of propaganda on the inbound link of described mobile router.
12. method as claimed in claim 11 also comprises:
Generate the ownership Care-of Address based on described delegated prefix; And
Send binding update messages via described second mobile router to home agent, with specify described mobile router and distribute to by described home agent in original mobile network's prefix of described mobile router at least one can arrive via described ownership Care-of Address.
13. method as claimed in claim 12, comprise separately in wherein said output and the forwarding step and insert reverse Route Selection head that this reverse Route Selection head comprises described local Care-of Address and is used for described second mobile router and goes to the empty slot of the defined amount of any middle hop on the path of described couple in router.
14. method as claimed in claim 12 also comprises:
Detection is by the second router promotional messages of described couple in router output, this the second router promotional messages has second prefix option and described couple in router is designated the tree information option of described top mobile router and described trust router, and described second prefix option is specified the available network prefix in the local mobile network who is used for being served by described couple in router;
Be attached to described couple in router by following steps;
(1) utilize new local Care-of Address to replace described local Care-of Address based on described available network prefix, and
(2) send binding update messages to described couple in router, it is to arrive via described new local Care-of Address that this binding update messages is specified described mobile router and described delegated prefix.
15. a couple in router, it is configured for the connectedness that is provided to the wide area packet switching network for local mobile network, and this couple in router comprises:
Delegation resource, it is configured for to each mobile router corresponding delegated address prefix is provided, and each in the described delegated address prefix is in the available network prefix that is used in the described local mobile network; And
The Route Selection resource that comprises routing table, this routing table are configured for the corresponding local Care-of Address that is used for arriving described local mobile network's corresponding mobile router for the storage of each delegated address prefix.
16. couple in router as claimed in claim 15, wherein said Route Selection resource comprises the router advertisement resource, this router advertisement resource is configured for the router advertisement message that output comprises prefix option and tree information option, described prefix option is specified the available network prefix that is used in the described local mobile network, and it is top router and the trust router that is configured to be used to provide described delegated address prefix that described tree information option is specified described couple in router.
17. couple in router as claimed in claim 16, wherein:
Described Route Selection resource comprises reverse Route Selection header resource, this reverse Route Selection header resource is configured for the continuous next hop address based on appointment in from the reverse Route Selection head of the message that receives of corresponding mobile router, establishes the source routing that is used for arriving the corresponding local Care-of Address of described local Care-of Address;
Described delegation resource is configured for the request for corresponding first delegated address prefix of reception from first mobile router in the described mobile router, this request comprises the reverse Route Selection head of specifying the path of going to described first mobile router, this reverse Route Selection head comprises the interior local Care-of Address of address space of described available network prefix, and described request also comprises first source address field of jumping of specifying described path;
Described delegation resource is configured for by utilizing can upgrade the banding cache clauses and subclauses via first delegated address prefix that described local Care-of Address arrives, and comes the gathering of the prefix in described available network prefix described first delegated address prefix to be distributed to described first mobile router;
Described delegation resource is in the grouping that comprises the source routing head of specifying described path, and first delegated address prefix that will be used for described first mobile router sends to first of described path and jumps.
18. couple in router as claimed in claim 17, wherein said local Care-of Address is in the address space of distributing to second delegated address prefix of corresponding second mobile router in the described mobile router.
19. couple in router as claimed in claim 18, wherein:
Described Route Selection resource is configured for reception from binding update messages described first mobile router and home agent that want to go to regulation, with specify described first mobile router and distribute to by the home agent of described regulation in original mobile network's prefix of described first mobile router at least one be to arrive via ownership Care-of Address with described first delegated address prefix;
Described reverse Route Selection header resource is configured for the attached reverse Route Selection head of removal from described binding update messages, and the described local Care-of Address of storage is to arrive via first path of jumping that comprises described path in the banding cache clauses and subclauses;
Described Route Selection resource is configured in the source address field of described binding update messages the address of inserting described couple in router, and the described binding update messages that will not have a described reverse Route Selection head is forwarded to the home agent of described regulation.
20. couple in router as claimed in claim 17, wherein:
Described Route Selection resource is configured for second binding update messages of reception from described first mobile router, this second binding update messages is specified in the address space that is in described available network prefix and is different from the second local Care-of Address of described second delegated address prefix, and described second Binding Update replaces described local Care-of Address; And
Described Route Selection resource is configured for to be utilized described first delegated address prefix and can upgrade described banding cache clauses and subclauses via described first mobile router that the described second local Care-of Address arrives.
21. a mobile router comprises:
Discharge coupling, it is configured for the router advertisement message of reception by second mobile router output of the attachment router of serving as described mobile router, this router advertisement message has prefix option and tree information option, described prefix option is specified first network prefix in the local mobile network who is used for being served by described second mobile router, and described tree information option is specified the couple in router that serves as top router and be configured to be used to provide the trust router of delegated address prefix; And
The Route Selection resource, it comprises:
(1) mobility resource, it is configured for based on described first network prefix and generates local Care-of Address, and via the output of described discharge coupling to via of the request of described second mobile router from the delegated prefix of described couple in router, described mobility interface is configured for the described delegated prefix of reception from described first network prefix of being different from of described couple in router, and
(2) propaganda resource, it is configured for the promotional messages of the described delegated prefix of output appointment on ingress interface.
22. mobile router as claimed in claim 21, wherein said mobility resource is configured for based on described delegated prefix and generates the ownership Care-of Address, and send binding update messages via described second mobile router to home agent, this binding update messages specify described mobile router and distribute to by described home agent in original mobile network's prefix of described mobile router at least one can arrive via described ownership Care-of Address.
23. mobile router as claimed in claim 22, wherein said mobility resource is configured for inserts reverse Route Selection head, and this reverse Route Selection head comprises described local Care-of Address and is used for described second mobile router and goes to the empty slot of the defined amount of any middle hop on the path of described couple in router.
24. mobile router as claimed in claim 22, wherein:
Described discharge coupling is configured for the second router promotional messages of reception by described couple in router output, this the second router promotional messages has second prefix option and described couple in router is designated the tree information option of described top mobile router and described trust router, and described second prefix option is specified the available network prefix in the local mobile network who is used for being served by described couple in router;
Described mobility resource is configured for by following steps and is attached to described couple in router;
(1) utilize new local Care-of Address to replace described local Care-of Address based on described available network prefix, and
(2) send binding update messages to described couple in router, it is to arrive via described new local Care-of Address that this binding update messages is specified described mobile router and described delegated prefix.
25. a computer-readable medium has been stored on it and is used for providing connective command sequence by couple in router for local mobile network, described command sequence comprises the instruction that is used to carry out following steps:
Based on first mobile router to described couple in router be attached to one of second mobile router attached of described couple in router, provide delegated address prefix to described first mobile router, each mobile router among the local mobile network who is served by described couple in router receives the corresponding unique delegated address prefix that is used in the described local mobile network; And
Has the remote care-of address of described delegated address prefix to the home agent registration of the regulation of described first mobile router, to register the accessibility of described first mobile router.
26. medium as claimed in claim 25, also comprise the instruction that is used to carry out following steps: output has the router advertisement message of prefix option and tree information option, described prefix option is specified the available network prefix that is used in the described local mobile network, and it is top router and the trust router that is configured to be used to provide described delegated address prefix that described tree information option is specified described couple in router.
27. medium as claimed in claim 26, the wherein said step that provides comprises:
Reception is from the request to described delegated address prefix of described first mobile router, this request comprises the reverse Route Selection head of specifying the path of going to described first mobile router, this reverse Route Selection head comprises the interior local Care-of Address of address space of described available network prefix, and described request also comprises first source address field of jumping of specifying described path;
Can upgrade the banding cache clauses and subclauses via the delegated address prefix that described local Care-of Address arrives by utilizing, the gathering of the prefix in described available network prefix, described delegated address prefix be distributed to described first mobile router; And
In the grouping that comprises the source routing head of specifying described path, the delegated address prefix that will be used for described first mobile router sends to first of described path and jumps.
28. medium as claimed in claim 27, wherein said second mobile router is assigned with second delegated address prefix, this second delegated address prefix is different from described delegated address prefix and is in the address space of described available network prefix, and described local Care-of Address is in the address space of described second delegated address prefix.
29. medium as claimed in claim 28, wherein said registration step comprises binding update messages is forwarded to the home agent of described regulation from described first mobile router, described binding update messages specify described first mobile router and distribute to by described home agent in original mobile network's prefix of described first mobile router at least one can arrive via described remote care-of address.
30. medium as claimed in claim 29, wherein said forwarding step comprises:
From described binding update messages, remove described reverse Route Selection head, and the described local Care-of Address of storage is to arrive via first path of jumping that comprises described path in the banding cache clauses and subclauses,
In the source address field of described binding update messages, insert the address of described couple in router, and
The described binding update messages that does not have described reverse Route Selection head is forwarded to the home agent of described regulation.
31. medium as claimed in claim 28 also comprises the instruction that is used to carry out following steps:
Reception is from second binding update messages of described first mobile router, this second binding update messages is specified in the address space that is in described available network prefix and is different from the second local Care-of Address of described second delegated address prefix, and described second Binding Update replaces described local Care-of Address; And
Utilization can be upgraded described banding cache clauses and subclauses via described delegated address prefix and described first mobile router that the described second local Care-of Address arrives.
32. medium as claimed in claim 25 also comprises the instruction that is used to carry out following steps: the router advertisement message that is used for the available network prefix in the described local mobile network is specified in output, and wherein:
Described second mobile router is assigned with second delegated address prefix, this second delegated address prefix is different from described delegated address prefix and is in the address space of described available network prefix, and described local Care-of Address is in the address space of described second delegated address prefix.
33. medium as claimed in claim 32, wherein said registration step comprises binding update messages is forwarded to the home agent of described regulation from described first mobile router, described binding update messages specify described first mobile router and distribute to by described home agent in original mobile network's prefix of described first mobile router at least one can arrive via described remote care-of address.
34. medium as claimed in claim 33, wherein said forwarding step comprises:
From described binding update messages, remove described reverse Route Selection head, and the described local Care-of Address of storage is to arrive via first path of jumping that comprises described path in the banding cache clauses and subclauses,
In the source address field of described binding update messages, insert the address of described couple in router, and
The described binding update messages that does not have described reverse Route Selection head is forwarded to the home agent of described regulation.
35. a computer-readable medium has been stored the command sequence that is used for being attached to for mobile router local mobile network on it, described command sequence comprises the instruction that is used to carry out following steps:
Detection is by the router advertisement message of second mobile router output of the attachment router of serving as described mobile router, this router advertisement message has prefix option and tree information option, described prefix option is specified first network prefix in the local mobile network who is used for being served by described second mobile router, and described tree information option is specified the couple in router that serves as top router and be configured to be used to provide the trust router of delegated address prefix;
Generate local Care-of Address based on described first network prefix;
Output is to via the request of described second mobile router from the delegated prefix of described couple in router;
The described delegated prefix that reception is distributed by described couple in router, described delegated prefix is different from described first network prefix; And
The described delegated prefix of propaganda on the inbound link of described mobile router.
36. medium as claimed in claim 35 also comprises:
Generate the ownership Care-of Address based on described delegated prefix; And
Send binding update messages via described second mobile router to home agent, this binding update messages specify described mobile router and distribute to by described home agent in original mobile network's prefix of described mobile router at least one can arrive via described ownership Care-of Address.
37. medium as claimed in claim 36, comprise separately in wherein said output and the forwarding step and insert reverse Route Selection head that this reverse Route Selection head comprises described local Care-of Address and is used for described second mobile router and goes to the empty slot of the defined amount of any middle hop on the path of described couple in router.
38. medium as claimed in claim 36 also comprises the instruction that is used to carry out following steps:
Detection is by the second router promotional messages of described couple in router output, this the second router promotional messages has second prefix option and described couple in router is designated the tree information option of described top mobile router and described trust router, and described second prefix option is specified the available network prefix in the local mobile network who is used for being served by described couple in router;
Be attached to described couple in router by following steps;
(1) utilize new local Care-of Address to replace described local Care-of Address based on described available network prefix, and
(2) send binding update messages to described couple in router, it is to arrive via described new local Care-of Address that this binding update messages is specified described mobile router and described delegated prefix.
39. a couple in router comprises:
Be used for providing the device of delegated address prefix to described couple in router and the attached of one of second mobile router that be attached to described couple in router to described first mobile router based on first mobile router, each mobile router among the local mobile network who is served by described couple in router receives corresponding unique delegated address prefix of using in described local mobile network; And
Be used for remote care-of address that home agent registration to the regulation of described first mobile router has a described delegated address prefix device with the accessibility of registering described first mobile router.
40. couple in router as claimed in claim 39, wherein said register device comprises the device that is used to export the router advertisement message with prefix option and tree information option, described prefix option is specified the available network prefix that is used in the described local mobile network, and it is top router and the trust router that is configured to be used to provide described delegated address prefix that described tree information option is specified described couple in router.
41. couple in router as claimed in claim 40, wherein said generator is configured for:
Reception is from the request to described delegated address prefix of described first mobile router, this request comprises the reverse Route Selection head of specifying the path of going to described first mobile router, this reverse Route Selection head comprises the interior local Care-of Address of address space of described available network prefix, and described request also comprises first source address field of jumping of specifying described path;
Can upgrade the banding cache clauses and subclauses via the delegated address prefix that described local Care-of Address arrives by utilizing, come the gathering of the prefix in described available network prefix, described delegated address prefix is distributed to described first mobile router; And
In the grouping that comprises the source routing head of specifying described path, the delegated address prefix that will be used for described first mobile router sends to first of described path and jumps.
42. couple in router as claimed in claim 41, wherein said second mobile router is assigned with second delegated address prefix, this second delegated address prefix is different from described delegated address prefix and is in the address space of described available network prefix, and described local Care-of Address is in the address space of described second delegated address prefix.
43. couple in router as claimed in claim 42, wherein said register device is configured for binding update messages is forwarded to the home agent of described regulation from described first mobile router, described binding update messages specify described first mobile router and distribute to by described home agent in original mobile network's prefix of described first mobile router at least one can arrive via described remote care-of address.
44. couple in router as claimed in claim 43, wherein said register device is configured for:
From described binding update messages, remove described reverse Route Selection head, and the described local Care-of Address of storage is to arrive via first path of jumping that comprises described path in the banding cache clauses and subclauses,
In the source address field of described binding update messages, insert the address of described couple in router, and
The described binding update messages that does not have described reverse Route Selection head is forwarded to the home agent of described regulation.
45. couple in router as claimed in claim 42, wherein said register device is configured for:
Reception is from second binding update messages of described first mobile router, this second binding update messages is specified in the address space that is in described available network prefix and is different from the second local Care-of Address of described second delegated address prefix, and described second Binding Update replaces described local Care-of Address; And
Utilization can be upgraded described banding cache clauses and subclauses via described first mobile router and described delegated address prefix that the described second local Care-of Address arrives.
46. comprising, couple in router as claimed in claim 39, wherein said register device be used to export the device of specifying the router advertisement message that is used for the available network prefix in the described local mobile network, and wherein:
Described second mobile router is assigned with second delegated address prefix, this second delegated address prefix is different from described delegated address prefix and is in the address space of described available network prefix, and described local Care-of Address is in the address space of described second delegated address prefix.
47. couple in router as claimed in claim 46, wherein said register device is configured for binding update messages is forwarded to the home agent of described regulation from described first mobile router, described binding update messages specify described first mobile router and distribute to by described home agent in original mobile network's prefix of described first mobile router at least one can arrive via described remote care-of address.
48. couple in router as claimed in claim 47, wherein said register device is configured for based on following steps and transmits described binding update messages:
From described binding update messages, remove described reverse Route Selection head, and the described local Care-of Address of storage is to arrive via first path of jumping that comprises described path in the banding cache clauses and subclauses,
In the source address field of described binding update messages, insert the address of described couple in router, and
The described binding update messages that does not have described reverse Route Selection head is forwarded to the home agent of described regulation.
49. a mobile router comprises:
Be used to detect the device of the router advertisement message of exporting by second mobile router of the attachment router of serving as described mobile router, this router advertisement message has prefix option and tree information option, described prefix option is specified first network prefix in the local mobile network who is used for being served by described second mobile router, described tree information option is specified the couple in router that serves as top router and be configured to be used to provide the trust router of delegated address prefix, and described checkout gear comprises the device that is used for generating based on described first network prefix local Care-of Address;
Be used to export to via described second mobile router from the request of the delegated prefix of described couple in router and the device that is used to receive the described delegated prefix of distributing by described couple in router, described delegated prefix is different from described first network prefix; And
The device that is used for the described delegated prefix of propaganda on the inbound link of described mobile router.
50. mobile router as claimed in claim 49, wherein:
Described generating apparatus is configured for based on described delegated prefix and generates the ownership Care-of Address; And
Described output device is configured for via described second mobile router and sends binding update messages to home agent, this binding update messages specify described mobile router and distribute to by described home agent in original mobile network's prefix of described mobile router at least one can arrive via described ownership Care-of Address.
51. mobile router as claimed in claim 50, wherein said checkout gear comprises the device that is used for inserting to described request and described binding update messages reverse Route Selection head, and this reverse Route Selection head comprises described local Care-of Address and is used for described second mobile router and goes to the empty slot of the defined amount of any middle hop on the path of described couple in router.
52. mobile router as claimed in claim 50, wherein:
Described checkout gear is configured for the second router promotional messages of detection by described couple in router output, this the second router promotional messages has second prefix option and described couple in router is designated the tree information option of described top mobile router and described trust router, and described second prefix option is specified the available network prefix in the local mobile network who is used for being served by described couple in router;
Described generating apparatus is configured for by following steps and is attached to described couple in router;
(1) utilize new local Care-of Address to replace described local Care-of Address based on described available network prefix, and
(2) send binding update messages to described couple in router, it is to arrive via described new local Care-of Address that this binding update messages is specified described mobile router and described delegated prefix.
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| Application Number | Priority Date | Filing Date | Title |
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| US51834603P | 2003-11-10 | 2003-11-10 | |
| US60/518,346 | 2003-11-10 | ||
| US10/806,312 | 2004-03-23 |
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| CN100593346C CN100593346C (en) | 2010-03-03 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101924685B (en) * | 2009-06-11 | 2012-08-08 | 华为技术有限公司 | Prefix updating method, device and system |
| CN103873375A (en) * | 2012-12-17 | 2014-06-18 | 三菱电机株式会社 | Mart meter system, management router, and meter |
| CN105874829A (en) * | 2014-01-10 | 2016-08-17 | 华为技术有限公司 | System and method for distributed and integrated mobility support for mobile networks and mobile hosts |
| WO2016191906A1 (en) * | 2015-05-29 | 2016-12-08 | 华为技术有限公司 | Internet protocol address allocation method and router |
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2004
- 2004-11-09 CN CN200480033009A patent/CN100593346C/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101924685B (en) * | 2009-06-11 | 2012-08-08 | 华为技术有限公司 | Prefix updating method, device and system |
| CN103873375A (en) * | 2012-12-17 | 2014-06-18 | 三菱电机株式会社 | Mart meter system, management router, and meter |
| CN105874829A (en) * | 2014-01-10 | 2016-08-17 | 华为技术有限公司 | System and method for distributed and integrated mobility support for mobile networks and mobile hosts |
| US10231164B2 (en) | 2014-01-10 | 2019-03-12 | Futurewei Technologies, Inc. | System and method for distributed and integrated mobility support for mobile networks and mobile hosts |
| CN105874829B (en) * | 2014-01-10 | 2019-11-01 | 华为技术有限公司 | For the system and method to mobile network and the distributed and integrated mobility support of mobile host |
| WO2016191906A1 (en) * | 2015-05-29 | 2016-12-08 | 华为技术有限公司 | Internet protocol address allocation method and router |
| CN106576120A (en) * | 2015-05-29 | 2017-04-19 | 华为技术有限公司 | Internet protocol address allocation method and router |
| CN106576120B (en) * | 2015-05-29 | 2019-09-13 | 华为技术有限公司 | Internet protocol address distribution method, router and computer readable storage medium |
| US10432579B2 (en) | 2015-05-29 | 2019-10-01 | Huawei Technologies Co., Ltd. | Internet protocol address allocation method and router |
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| CN100593346C (en) | 2010-03-03 |
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