CN101316222B - Mobility management entity, communication system and routing optimization method of mobile IP - Google Patents
Mobility management entity, communication system and routing optimization method of mobile IP Download PDFInfo
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- CN101316222B CN101316222B CN200710028253.XA CN200710028253A CN101316222B CN 101316222 B CN101316222 B CN 101316222B CN 200710028253 A CN200710028253 A CN 200710028253A CN 101316222 B CN101316222 B CN 101316222B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W8/08—Mobility data transfer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
- H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]
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Abstract
The invention discloses a mobile management entity which includes: a storage unit for storing the information of a node opposite to a mobile node, a receiving unit for receiving the information carrying the current address of the mobile node and coming from the mobile node, and an updating processing unit used for transmitting the information received by the receiving unit and carrying the current address of the mobile node to the node opposite to the mobile node according to the information of the node opposite to the mobile node, which is stored by the storage unit, so as to instruct the opposite node to use the current address as the transfer address of the mobile node. In addition, the invention also discloses a method for optimizing the communication system and a mobile IP routing. By adopting the invention, the safety of the signaling transmission process of the whole BU message can be guaranteed under the condition of not transmitting a RRP (return routability procedure) test, and binding update time can be shortened.
Description
Technical field
The present invention relates to communication field, relate in particular to the routing optimization method of a kind of Mobility Management Entity, communication system and Mobile IP.
Background technology
Mobile IP (Mobile IP) agreement provides a kind of routing mechanism, supports the connectivity of mobile node (Mobile Node, MN) when moving in IP network, and MN still can be kept after leaving its home network and being connected of network.
In MIPv4, when MN leaves home network, MN adopts home address (HomeAddress, HoA) to identify on the one hand all the time, and the change because of visited network does not change, to obtain on the other hand a Care-of Address (Care of Address, CoA), and to its home agent (Home Agent, HA) register CoA, thereby (Care ofAddress, CoA) is associated with a Care-of Address.MN will be intercepted and captured by the HA of MN when receiving the packet of peer node (Corresponding Node, CN) transmission, send to the CoA of MN by the tunnel again; But MN is when sending packet to CN, then can be routed directly to CN, as shown in Figure 1, consist of a triangle route when therefore CN communicates by letter with MN, increased the time-delay in the transmission course, be difficult to guarantee service quality (Quality of Services, QoS), and caused the consumption of Internet resources.
For the problems referred to above, MIPv6 has carried out routing optimality (Route Optimization, RO) process, each IPv6 node can be safeguarded the banding cache of a home address and Care-of Address (HoA-CoA), because the existence of this banding cache, so CN just can directly send the data to MN, and do not need through HA, thereby avoided the phenomenon of " triangle route ", so the updating maintenance of banding cache weighs very, when MN is moved, the CoA of MN changes, and MN upgrades banding cache by sending Binding Update (BU) message informing CN and home agent.
At present; MN upgrades in the banding cache process by sending Binding Update (BU) message informing CN; in order to guarantee the fail safe of signalling; but MN must come and go routing procedure (Return Routability Procedure before sending BU; RRP) test; on the one hand; the RRP test needs to transmit through HA; increased the weight of the burden of HA; bring larger time delay; on the other hand; because the RRP test usually can be attacked (off-path) outside MN and the CN path and be protected, but can't be to protect the impact of therefore attacking in order to reduce on-path as far as possible from the attack of (On-Path) on MN and the CN path; the longlyest just must carry out BU operation every 420 seconds; this scheme is for MN, and the MN that does not particularly frequently move will produce larger signaling consumption burden; when communicating pair all was mobile node, it is particularly serious that this burden shows.
Summary of the invention
The embodiment of the invention provides the routing optimization method of a kind of Mobility Management Entity, communication system and Mobile IP, has not only guaranteed the fail safe of signalling, and avoided with the RRP testing scheme than long time delay, and heavier signaling consumption burden.
In order to solve the problems of the technologies described above, the embodiment of the invention has proposed a kind of Mobility Management Entity, comprises
Memory cell, receiving element and processing unit, wherein:
Described memory cell, the correspondent node information that is used for preserving mobile node;
Described receiving element is used for receiving the current address information from the described mobile node of mobile node;
Described processing unit is used for the correspondent node information according to described memory cell mobile node, and the current address information of the described mobile node that described receiving element is received sends to the peer node of described mobile node.
Correspondingly, the embodiment of the invention also provides a kind of communication system, comprise: Mobility Management Entity, it is deployed in network side, be used for receiving the current address information from the described mobile node of mobile node, and according to the correspondent node information of mobile node in the described memory cell, the current address information of described mobile node is sent to the peer node of described mobile node.
Correspondingly, the embodiment of the invention also provides a kind of routing optimization method of Mobile IP, comprising:
Reception sends the current address information of described mobile node from this mobile node current address information of mobile node to the peer node of this mobile node;
Described peer node receives the current address information of described mobile node, with the Care-of Address of this current address as described mobile node.
Each node in the embodiment of the invention route optimization system disposes the MME of ownership place, by the correspondent node information of MME according to the mobile node of having preserved, to send to from the message of the described mobile node of carrying of described mobile node current address the peer node of described mobile node, and indicate described peer node with the Care-of Address of described current address as described mobile node.Therefore; be carried on the information of the described mobile node current address in Binding Update (BU) signaling message in the embodiment of the invention; through MN, the Mobility Management Entity (MME/MN) of mobile node ownership place, the Mobility Management Entity (MME/CN) of peer node ownership place; send at last one or more CN; signalling all can obtain safeguard protection easily, and concrete condition is as follows:
Because Signalling exchange between MME/MN and MN belongs to the mobile node of same operator management and communicating by letter of network, therefore can by setting up in advance Security Association, for example, adopt security mechanism (IPsec) to carry out the signaling protection;
In like manner, also can adopt same method to carry out the signalling protection between MME/CN and CN;
And for the communication path between MME/MN and MME/CN; owing to there is the trusting relationship of mutually consulting between different operators, therefore can after the negotiation by in the method for setting up secure tunnel between MME/MN and MME/CN the signalling on this section path being protected.And this secure tunnel is set up at wired network, till can continue until between operator the trusting relationship of mutually consulting after the foundation and expiring, does not therefore increase the propagation delay time of BU message.
In sum, because whole BU message signalling process has safeguard protection, but therefore can no longer need to come and go routing procedure (Return Routability Procedure, RRP), shorten the Binding Update time; Do not introduce simultaneously new security threat, improved safe class, can prevent the attack of on-path, prolonged the life cycle of Binding Update, maximum can reach 86400 seconds, the HoA prefix that is MN has obtained prolongation effective time, reduces owing to the signaling consumption that needs frequent Binding Update to bring.
Description of drawings
Fig. 1 is the schematic diagram of mobile node and peer node intercommunication data in the existing technology;
Fig. 2 is the first embodiment schematic diagram of communication system of the present invention;
Fig. 3 is the network architecture diagram of the Application Example of communication system the first embodiment of the present invention;
Fig. 4 is the second embodiment schematic diagram of communication system of the present invention;
Fig. 5 is the network architecture schematic diagram of the Application Example of communication system the second embodiment of the present invention;
Fig. 6 is the first embodiment schematic diagram of Mobility Management Entity of the present invention;
Fig. 7 is the second embodiment schematic diagram of Mobility Management Entity of the present invention;
Fig. 8 is the 3rd embodiment schematic diagram of Mobility Management Entity of the present invention;
Fig. 9 is the form schematic diagram of the BU message mobile option of the embodiment of the invention;
Figure 10 is the 4th embodiment schematic diagram of Mobility Management Entity of the present invention;
Figure 11 is the first embodiment schematic flow sheet of movable IP routing optimizing method of the present invention;
Figure 12 is the concrete steps schematic flow sheet of step s1 among Figure 10;
Figure 13 is the second embodiment schematic flow sheet of movable IP routing optimizing method of the present invention;
Figure 14 is the form schematic diagram of the BU message of the embodiment of the invention;
Figure 15 is the form schematic diagram of the BA message of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing preference of the present invention is elaborated.
At first, need to prove that in two end nodes of the mutual communication in the embodiment of the invention, an end node is mobile node (MN), other end node can be that stationary nodes also can be mobile node, is referred to as in embodiments of the present invention peer node (CN).
In addition, the information from the described mobile node current address of mobile node described in the invention process, portability is in binding update messages in actual applications, and the below describes as an example of binding update messages example.
With reference to figure 2, this figure is the first embodiment schematic diagram of communication system of the present invention, comprise Mobility Management Entity (Mobility Management Entity, MME) 1, it is deployed in network side, be used for to receive the current address information from the described mobile node of mobile node, and according to the correspondent node information of mobile node in the described memory cell, the current address information of described mobile node is sent to the peer node of described mobile node.
Fig. 3 is the network architecture diagram of an Application Example of present embodiment, wherein, Mobile Node represents mobile node, MME/MN represents the Mobility Management Entity of mobile node ownership place, DNS Server represents name server, Corresponding Nodes represents peer node, and MME/CN represents the Mobility Management Entity of peer node ownership place, and Foreign Link represents foreign link.
When mobile node is moved, the Mobility Management Entity of mobile node ownership place at first receives the binding update messages of described mobile node 11, then, correspondent node information according to the mobile node of preserving, this binding update messages is sent to the Mobility Management Entity of peer node ownership place, after the Mobility Management Entity of peer node ownership place receives this binding update messages, binding update messages is transmitted to corresponding peer node.
Need to prove, this application embodiment is different from the ownership place of peer node with mobile node, be mobile node and the corresponding different Mobility Management Entity of peer node difference, describe, but the mobile node ownership place also can be identical with the peer node ownership place in the practical application, namely corresponding to identical Mobility Management Entity, correspondingly, the Mobility Management Entity MME/CN of the Mobility Management Entity MME/MN of the mobile node ownership place among Fig. 3 and peer node ownership place is same.
In addition, also can comprise the location-server 2 of the information of preserving MME among the communication system embodiment of the present invention, name server (Domain Name Server, DNS) for example, as shown in Figure 4.During specific implementation, the Mobility Management Entity of mobile node ownership place, before the Mobility Management Entity to the peer node ownership place sends binding update messages, the nslookup server is to obtain the MME information of each peer node ownership place, such as information such as IP addresses, the network architecture of this application embodiment as shown in Figure 5, wherein Mobile Node represents mobile node, MME/MN represents the Mobility Management Entity of mobile node ownership place, DNS Server represents name server, Corresponding Nodes represents peer node, and MME/CN represents the Mobility Management Entity of peer node ownership place, and Foreign Link represents foreign link.
The below is elaborated to the MME in the embodiment of the invention, with reference to figure 6, this figure is the first embodiment schematic diagram of Mobility Management Entity of the present invention, mainly comprise: memory cell 21, receiving element 23 and processing unit 22, memory cell 21 is preserved the mobile node correspondent node information, when practical application, correspondent node information is a list item (list), mobile node can be when registering to belonging area network, the information of registration peer node, correspondent node information can be passed through the IP address designation, can also pass through conversation initialized protocol (SIP:Session Initiation Protocol, SIP) alternate manner such as address or domain name addresses sign, if adopt the IP address to identify, when CN was mobile node, the IP address of CN should be HoA and the CoA of CN among the List, if CN is stationary nodes, then the IP address of CN is the fixed address of CN among the List;
With reference to figure 7, this figure is the second embodiment schematic diagram of Mobility Management Entity of the present invention, and identical with the first embodiment is to comprise equally:: memory cell 21, receiving element 23 and processing unit 22.
Different is, during processing unit 22 specific implementation, behind the binding update messages that receives mobile node, determine the peer node of binding to be updated according to each correspondent node information of the described mobile node of having preserved, obtain the Mobility Management Entity information of the peer node ownership place of described binding to be updated, and send described binding update messages according to the Mobility Management Entity information of described peer node, if the Mobility Management Entity information of described peer node indicates described peer node identical with the ownership place of described mobile node, then described updating message is directly sent to described peer node, otherwise, through the Mobility Management Entity of described peer node ownership place described binding update messages is sent to described peer node; Perhaps when the binding update messages that receives from the MME of mobile node ownership place, will from the binding update messages of the Mobility Management Entity of mobile node ownership place, be transmitted to corresponding peer node; Perhaps will from the binding update messages of peer node, be transmitted to corresponding mobile node.
As shown in Figure 7, described processing unit 22 mainly comprises: tactful determining unit 2211, judgement processing unit 2212 and transmitting element 2213;
During specific implementation, at first, by tactful determining unit 2211 after the described mobile node current address information that receives from mobile node, by with the mutual strategy of determining to send to the peer node of described mobile node described current address information of upper layer application layer, then, judge the Mobility Management Entity information of whether preserving described definite peer node ownership place in the described memory cell 21 by judging processing unit 2212, if, then obtain the Mobility Management Entity information of described peer node ownership place, otherwise, obtain alternately the Mobility Management Entity information of described peer node ownership place with location-server, at last, the Mobility Management Entity information of the peer node ownership place that is obtained according to described judgement processing unit 2212 by transmitting element 2213 is judged, if described definite peer node and described mobile node belong to identical ownership place, the strategy of then determining according to described tactful determining unit 2211 sends to described current address information the peer node of described selection, otherwise the strategy of determining according to described tactful determining unit 2211 sends to described current address information by the Mobility Management Entity of described definite peer node ownership place the peer node of described selection.
Need to illustrate, strategy determining unit 2211 is after the described mobile node current address information (namely receiving binding update messages) that receives from mobile node, each correspondent node information according to the described mobile node of having preserved, by alternately determining to send to the peer node of described mobile node the strategy of described current address information with the upper layer application layer, selection sends binding update messages to which peer node, for example, can select to the CN transmission BU message of N registration of nearest communication, or send BU message etc. to the CN of online portable terminal registration, improved the high efficiency of BU signalling.
In addition, the setting of judging processing unit 2212 in the present embodiment fully takes into account in the information list of peer node of the mobile node registration of preserving in the memory cell 21, except the HoA that comprises CN, the situation that can also comprise the MME address of the CN ownership place related with CN, at this moment the direct MME information of obtaining the peer node ownership place from information list then, no longer need to inquire about location-server, for example name server (DNS) obtains the MME address of CN ownership place, has reduced signaling consumption.
With reference to figure 8, this figure is the 3rd embodiment schematic diagram of Mobility Management Entity of the present invention, and in the present embodiment, described Mobility Management Entity is except comprising the functional module identical with embodiment two, and described processing unit 22 also includes:
Correspondent node information edit cell 2214, for increasing, delete or revise the correspondent node information of mobile node in the described memory cell.That is, carrying indication in binding update messages increases peer node in described memory cell, or when deleting the mobile option of the peer node of having preserved in the described memory cell, according to described mobile option deletion or increase correspondent node information.
Fully take into account the replacement problem of correspondent node information tabulation in the present embodiment, can be as required, upgrade by BU message, in addition, when mobile node when registering to belonging area network, when not having the information of peer node to carry out initialization, when namely the content of said memory cells 21 is empty, also can increase CN information by the mobile option in the BU message.
In addition, the form of BU message mobile option, as shown in Figure 9, when needs added the CN node, mobile option type (Type) value was 6, the main information that comprises is the IP address of CN to be added, if CN is mobile node, then comprises the HoA of CN; When deletion CN node, the value of Type is 7 in the mobile option, mainly comprises the IP address of CN to be deleted in this message.
In addition, when preserving the MME address of CN ownership place in the memory cell 21, if need to add CN, then in the BU message mobile option except the HoA that comprises CN to be added, also need to comprise the MME address of the ownership place of CN to be added; If need deletion CN, the HoA that then comprises CN to be deleted in the mobile option is just passable.
In addition, MME in the invention process can also provide the position hiding service to MN, as shown in figure 10, this figure is the 4th embodiment schematic diagram of invention Mobility Management Entity, what the first embodiment of this embodiment and Mobility Management Entity was different is, also comprise processing data packets unit 24, be used for receiving the packet from the peer node of mobile node, give described mobile node by the tunnel between described mobile node and this entity with described Packet Generation.Namely, be used for when the peer node of forward direction mobile node transmission packet does not belong to the peer node of the mobile node of having preserved when memory cell 21, the Mobility Management Entity of described mobile node ownership place is intercepted and captured the packet from described peer node, and by giving described mobile node with the tunnel of described mobile node with described Packet Generation, therefore the MME compatibility function of all HA, have stronger portability and extensibility.
In addition, although the MME in the embodiment of the invention has the processing data packets unit, be mainly used in replacing MN to send BU message to CN, under most data cases, do not participate in the transmission of packet, therefore that has realized chain of command and user's face separates the flattening that is conducive to communicate by letter.
With reference to Figure 11, this figure is the first embodiment schematic flow sheet of movable IP routing optimizing method of the present invention, and this flow process comprises:
Step s1 receives this mobile node current address information from mobile node, sends the current address information of described mobile node to the peer node of this mobile node;
Step s2, described peer node receive the current address information of described mobile node, with the Care-of Address of this current address as described mobile node.
Figure 12 shows the specific implementation flow process of step s1, may further comprise the steps
Step s11 receives this mobile node current address information from mobile node;
Step s12, definite strategy that sends described current address information to the peer node of described mobile node;
Step s13 determines the Mobility Management Entity information of described peer node ownership place;
Step s14 judges whether described peer node and described mobile node belong to identical ownership place, if execution in step s15 then, otherwise execution in step s16;
Step s15 sends to described peer node according to described strategy with described mobile node current address information;
Step s16 sends to described peer node according to the Mobility Management Entity of described strategy by described peer node ownership place with described mobile node current address information.
Wherein, step s12 and s13 further comprise:
Step s121 according to the described mobile node current address information from mobile node, determine to receive the peer node of described address information, obtains the information of the peer node of described selection from each correspondent node information of the described mobile node preserved;
Step s122, information according to the peer node of described selection, judge whether to preserve the Mobility Management Entity information of the peer node ownership place of described selection, if, then obtain the Mobility Management Entity information of described selection peer node ownership place, otherwise, obtain alternately the Mobility Management Entity information of described peer node ownership place with location-server.
After step s2, described peer node transmits packet according to the binding of home address and the Care-of Address of the described mobile node that has upgraded with described mobile node.Here, if the CN that sends packet to MN is not the CN of described MN registration, namely, when the correspondent node information of forward direction mobile node transmission packet is not saved, then the MME of MN ownership place receives described packet, and in order to hide the address of MN, and send described packet to MN by the tunnel.
Need explanation, in MN change in location, business demand or binding life cycle soon in the situation such as expired, MN can initiate BU message to MME/MN.
As shown in figure 13, represent the MME of MN ownership place with MME/MN, represent the MME of CN ownership place with MME/CN, then the second embodiment of movable IP routing optimizing method of the present invention comprises following flow process:
Step s21, MN sends BU message to MME/MN;
Step s22, MME/MN upgrade the binding of described MN after described BU message is carried out security inspection;
Step s23, MME/MN replys BA message to described MN;
Step s24, MME/MN obtain the CN information of MN, and which CN determines has to upgrade the binding of MN among the CN of described preservation, and obtain the information of the CN of described MN binding to be updated, and this CN message can be the HoA of CN.During specific implementation, by alternately determining to send to the peer node of described mobile node the strategy of described current address information with the upper layer application layer, for example, can select to the CN transmission BU message of N registration of nearest communication, or send BU message etc. to the CN of online portable terminal registration, improved the high efficiency of BU signalling;
Step s25, MME/MN sends Requestfor MME/CN according to the HoA of the CN of described MN binding to be updated of obtaining to DNS, inquires about the address of the MME/CN of described portable terminal registration;
Step s26, DNS replys Responsefor MME/CN to MME/MN, replys the address of MME/CN to MME/MN;
Step s27, MME/MN be according to the address of described MME/CN, by and MME/CN between the tunnel BU message is sent to MME/CN;
Step s28, MME/CN are transmitted to BU message the one or more corresponding CN of described BU message indicating;
Step s29, CN upgrades banding cache according to the BU that receives, during specific implementation, CN will according to the value of BU message " A " bit, judge whether to need to reply BA message after receiving BU message, as shown in figure 14, this figure is the basic format of BU message, if BA message is then replied in the set of A bit, otherwise, do not reply BA message.
Need to illustrate, mobile node MN is different from the ownership place of peer node CN in the present embodiment, be MN and the corresponding different Mobility Management Entity of CN difference, but the MN ownership place also can be identical with the CN ownership place in the practical application, namely corresponding to identical Mobility Management Entity, correspondingly, after the step s25, also comprise before the step s26: the Mobility Management Entity information according to described peer node sends described binding update messages, if the Mobility Management Entity information of described peer node indicates described peer node identical with the ownership place of described mobile node, then according to described strategy described mobile node current address information is sent to described peer node, otherwise, execution in step s26;
In addition, the CN information of the MN registration that the MME/MN in the embodiment of the invention preserves also can be upgraded, during specific implementation, realize by carrying mobile option in the BU message, correspondingly above-mentioned steps s22 is after the BU message that receives from MN, delete or increase the CN of described mobile option indicating according to the type of mobile option, if mobile option type (Type) value is 6, then the CN with the mobile option indicating adds in the CN information table of MN registration, if the value of Type is 7 in the mobile option, then delete the CN of mobile option indication; Therefore according to described mobile option deletion or increase peer node, if this BU message just in order to delete the tabulation of CN nodal information, then MME/MN receives after the BU message that not the CN in the tabulation sends the BU message of MN; If this BU message for adding a CN node in List, after then MME/MN tabulates and adds processing, also should send to the CN node of new interpolation the BU message of MN;
Correspondingly, step s23MME/MN returns to MN and carries relevant conditional code in the BA message, and with the update status of the CN information table of indication MN registration, if for example carry numeral 2, then interpolation is accepted in expression; If carry numeral 3, then deletion is accepted in expression; If carry numeral 140, then the expression refusal adds; If carry numeral 141, then deletion etc. is refused in expression, and as shown in figure 15, this figure is the schematic diagram that carries the BA message of conditional code, wherein
Mobility Option: expression mobile option;
Sequence#: expression sequence number;
Lifetime: the life span of expression banding cache;
Status: the expression state, i.e. conditional code in the embodiment of the invention, for example:
1) 2, expression is accepted list item and is added;
2) 3, the list item deletion is accepted in expression;
3) 140, expression refusal list item adds;
4) 141, the deletion of expression refusal list item;
In addition, the below carries out briefly bright to the basic format of BU message among the step s28, as shown in figure 13:
Mobility Option: expression mobile option;
Sequence#: expression sequence number;
Lifetime: the life span of expression banding cache;
Reserved: expression keeps the position;
A: expression A bit;
H: expression H bit;
L: expression L bit;
K: expression K bit;
In sum, embodiment by communication system of the present invention, Mobility Management Entity, movable IP routing optimizing method, because whole BU message signalling process has safeguard protection, but therefore can no longer need to come and go routing procedure (Return Routability Procedure, RRP), shortened the Binding Update time; Do not introduce simultaneously new security threat, improved safe class, can prevent the attack of on-path, prolonged the life cycle of Binding Update, maximum can reach 86400 seconds, the HoA prefix that is MN has obtained prolongation effective time, reduces owing to the signaling consumption that needs frequent Binding Update to bring.
The above is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also are considered as protection scope of the present invention.
Claims (9)
1. a Mobility Management Entity is characterized in that, comprising:
Memory cell, the correspondent node information that is used for preserving mobile node;
Receiving element is used for receiving the current address information from the described mobile node of mobile node;
Processing unit is used for the correspondent node information according to described memory cell mobile node, and the current address information of the described mobile node that described receiving element is received sends to the peer node of described mobile node;
Wherein,
Described processing unit comprises:
The strategy determining unit is used for determining to send to the peer node of described mobile node the strategy of described current address information after the described mobile node current address information that receives from mobile node;
Judge processing unit, be used for judging whether described memory cell preserves the Mobility Management Entity information of definite peer node ownership place, if, then obtain the Mobility Management Entity information of described peer node ownership place, otherwise, obtain alternately the Mobility Management Entity information of described peer node ownership place with location-server;
Transmitting element, Mobility Management Entity information for the peer node ownership place that obtains according to described judgement processing unit is judged, if described definite peer node and described mobile node belong to identical ownership place, the strategy of then determining according to described tactful determining unit sends to described current address information the peer node of selection, otherwise the strategy of determining according to described tactful determining unit sends to described current address information by the Mobility Management Entity of described definite peer node ownership place the peer node of described selection.
2. Mobility Management Entity as claimed in claim 1 is characterized in that, described processing unit also comprises:
The correspondent node information edit cell, for increasing, delete or revise the correspondent node information of mobile node in the described memory cell.
3. Mobility Management Entity as claimed in claim 1 is characterized in that, also comprises:
The processing data packets unit is used for receiving the packet from the peer node of mobile node, gives described mobile node by the tunnel between described mobile node and this entity with described Packet Generation.
4. communication system, it is characterized in that, comprise: Mobility Management Entity, it is deployed in network side, be used for receiving the current address information from the described mobile node of mobile node, and according to the correspondent node information of mobile node in the memory cell, the current address information of described mobile node is sent to the peer node of described mobile node;
Wherein,
Described Mobility Management Entity comprises:
Memory cell, the correspondent node information that is used for preserving mobile node;
Receiving element is used for receiving the current address information from the described mobile node of mobile node;
Processing unit is used for the correspondent node information according to described memory cell mobile node, and the current address information of the described mobile node that described receiving element is received sends to the peer node of described mobile node;
Described processing unit comprises:
The strategy determining unit is used for determining to send to the peer node of described mobile node the strategy of described current address information after the described mobile node current address information that receives from mobile node;
Judge processing unit, be used for judging whether described memory cell preserves the Mobility Management Entity information of definite peer node ownership place, if, then obtain the Mobility Management Entity information of described peer node ownership place, otherwise, obtain alternately the Mobility Management Entity information of described peer node ownership place with location-server;
Transmitting element, Mobility Management Entity information for the peer node ownership place that obtains according to described judgement processing unit is judged, if described definite peer node and described mobile node belong to identical ownership place, the strategy of then determining according to described tactful determining unit sends to described current address information the peer node of selection, otherwise the strategy of determining according to described tactful determining unit sends to described current address information by the Mobility Management Entity of described definite peer node ownership place the peer node of described selection.
5. communication system as claimed in claim 4 is characterized in that, also comprises:
Location-server, the information that is used for preserving the network Mobility Management Entity.
6. the routing optimization method of a Mobile IP is characterized in that, comprising:
Mobility Management Entity receives this mobile node current address information from mobile node, sends the current address information of described mobile node to the peer node of this mobile node;
Described peer node receives the current address information of described mobile node, with the Care-of Address of this current address as described mobile node;
Wherein,
The step that described peer node to mobile node sends described mobile node current address information specifically comprises:
Determine to send to the peer node of described mobile node the strategy of described current address information;
Determine the Mobility Management Entity information of described peer node ownership place;
If described peer node and described mobile node belong to identical ownership place, then according to described strategy described mobile node current address information is sent to described peer node; Otherwise, according to the Mobility Management Entity of described strategy by described peer node ownership place described mobile node current address information is sent to described peer node.
7. the routing optimization method of Mobile IP as claimed in claim 6 is characterized in that, comprising:
According to the described mobile node current address information from mobile node, determine to receive the peer node of described address information, from each correspondent node information of the described mobile node preserved, obtain the information of the peer node of selection;
Information according to the peer node of described selection, judge whether to preserve the Mobility Management Entity information of selectable peer node ownership place, if, then obtain the Mobility Management Entity information of the peer node ownership place of described selection, otherwise, obtain alternately the Mobility Management Entity information of the peer node ownership place of described selection with location-server.
8. the routing optimization method of Mobile IP as claimed in claim 6 is characterized in that, further comprises:
Reception is from the indication information of mobile node, and the information of the peer node of this mobile node is deleted or increased in this indication information indication;
According to indication information, the information of deletion or increase peer node.
9. such as the routing optimization method of each described Mobile IP among the claim 6-8, it is characterized in that, when the correspondent node information of forward direction mobile node transmission packet is not saved, also comprise:
The Mobility Management Entity of described mobile node ownership place receives the packet from described peer node, gives described mobile node by the tunnel of this Mobility Management Entity and described mobile node with described Packet Generation.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710028253.XA CN101316222B (en) | 2007-05-29 | 2007-05-29 | Mobility management entity, communication system and routing optimization method of mobile IP |
| PCT/CN2008/070743 WO2008145035A1 (en) | 2007-05-29 | 2008-04-17 | Mobility management entity, communication system and mobile ip route updating method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200710028253.XA CN101316222B (en) | 2007-05-29 | 2007-05-29 | Mobility management entity, communication system and routing optimization method of mobile IP |
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| CN101316222A CN101316222A (en) | 2008-12-03 |
| CN101316222B true CN101316222B (en) | 2013-04-17 |
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| CN200710028253.XA Expired - Fee Related CN101316222B (en) | 2007-05-29 | 2007-05-29 | Mobility management entity, communication system and routing optimization method of mobile IP |
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| CN (1) | CN101316222B (en) |
| WO (1) | WO2008145035A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US8385285B2 (en) * | 2009-11-20 | 2013-02-26 | Telefonaktiebolaget Lm Ericsson (Publ) | System, method and devices for enabling efficient hybrid route optimization between two mobile endpoints |
| US8434142B2 (en) * | 2010-02-26 | 2013-04-30 | Telefonaktiebolaget L M Ericsson (Publ) | Method for mitigating on-path attacks in mobile IP network |
| CN102256236B (en) * | 2011-06-08 | 2014-05-28 | 北京交通大学 | System and method for mobility management under separate mapping mechanism |
| CN102929945B (en) * | 2012-09-28 | 2016-03-30 | 用友网络科技股份有限公司 | Data distribution device and data distributing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6704311B1 (en) * | 1999-06-25 | 2004-03-09 | Lucent Technologies Inc. | Application-level switching server for internet protocol (IP) based networks |
| CN1747471A (en) * | 2004-09-10 | 2006-03-15 | 日立通讯技术株式会社 | Communication system, server, router, and mobile communications terminal |
| CN1777137A (en) * | 2005-12-02 | 2006-05-24 | 浙江中控技术有限公司 | Data translation device and system based on ethernet and serial communication technology |
-
2007
- 2007-05-29 CN CN200710028253.XA patent/CN101316222B/en not_active Expired - Fee Related
-
2008
- 2008-04-17 WO PCT/CN2008/070743 patent/WO2008145035A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6704311B1 (en) * | 1999-06-25 | 2004-03-09 | Lucent Technologies Inc. | Application-level switching server for internet protocol (IP) based networks |
| CN1747471A (en) * | 2004-09-10 | 2006-03-15 | 日立通讯技术株式会社 | Communication system, server, router, and mobile communications terminal |
| CN1777137A (en) * | 2005-12-02 | 2006-05-24 | 浙江中控技术有限公司 | Data translation device and system based on ethernet and serial communication technology |
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| CN101316222A (en) | 2008-12-03 |
| WO2008145035A1 (en) | 2008-12-04 |
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