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 PDF

Info

Publication number
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
Authority
CN
China
Prior art keywords
node
mobile node
information
mobile
management entity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN200710028253.XA
Other languages
Chinese (zh)
Other versions
CN101316222A (en
Inventor
姚忠辉
何诚
田永刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CN200710028253.XA priority Critical patent/CN101316222B/en
Priority to PCT/CN2008/070743 priority patent/WO2008145035A1/en
Publication of CN101316222A publication Critical patent/CN101316222A/en
Application granted granted Critical
Publication of CN101316222B publication Critical patent/CN101316222B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • 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
    • 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]

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

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

Mobility management entity, communication system and route optimization method of mobile IP
Technical Field
The present invention relates to the field of communications, and in particular, to a mobility management entity, a communication system, and a route optimization method for mobile IP.
Background
Mobile IP (Mobile IP) protocol provides a routing mechanism to support connectivity of a Mobile Node (MN) when the MN moves in an IP network, so that the MN can maintain a connection with the network after leaving its home network.
In MIPv4, when a MN leaves a Home network, the MN, on the one hand, always identifies with a Home Address (HoA) and does not change due to a change in a visited network, and on the other hand, will obtain a Care of Address (CoA) and register the CoA with its Home Agent (HA) so as to be associated with a Care of Address (CoA). When receiving a data packet transmitted by a Correspondent Node (CN), the MN intercepts and captures the data packet by the HA of the MN, and then sends the data packet to the CoA of the MN through a tunnel; however, when the MN sends a packet to the CN, the packet can be directly routed to the CN, as shown in fig. 1, so that a triangular route is formed when the CN communicates with the MN, which increases the delay in the transmission process, makes it difficult to ensure Quality of service (QoS), and also causes consumption of network resources.
In view of the above problems, MIPv6 performs Route Optimization (RO) processing, each IPv6 node can maintain a binding cache of a home address and a care-of address (HoA-CoA), and due to the existence of the binding cache, the CN can directly send data to the MN without going through the HA, thereby avoiding the phenomenon of "triangular routing", and therefore, the update maintenance of the binding cache is very important, and when the MN moves, the CoA of the MN changes, and the MN notifies the CN and the home agent of updating the binding cache by sending a Binding Update (BU) message.
Currently, the MN informs the CN of updating the binding cache by sending a Binding Update (BU) message, in order to ensure the security of signaling transmission, the MN must perform round-trip Routability Procedure (RRP) test before sending the BU, where on one hand, the RRP test needs to transmit through the HA, which burdens the HA and causes a large delay, and on the other hand, since the RRP test can generally protect against off-path (off-path) attacks by the MN and the CN, but cannot protect the attack from the On-Path (On-Path) between MN and CN, so in order to minimize the impact of the On-Path attack, BU operation must be performed every 420 seconds at most, and this scheme is used for MN, particularly, in the case of an MN that does not frequently move, a large signaling overhead load is generated, and this load is particularly serious when both communication parties are mobile nodes.
Disclosure of Invention
The embodiment of the invention provides a mobility management entity, a communication system and a route optimization method of a mobile IP (Internet protocol), which not only ensure the safety of signaling transmission, but also avoid larger time delay with an RRP (remote radio resource procedure) test scheme and heavier signaling overhead burden.
In order to solve the above technical problem, an embodiment of the present invention provides a mobility management entity, including
Memory cell, receiving element and processing unit, wherein:
the storage unit is used for storing the opposite end node information of the mobile node;
the receiving unit is used for receiving the current address information of the mobile node from the mobile node;
and the processing unit is used for sending the current address information of the mobile node received by the receiving unit to the opposite node of the mobile node according to the opposite node information of the mobile node in the storage unit.
Correspondingly, an embodiment of the present invention further provides a communication system, including: and the mobility management entity is deployed at a network side and used for receiving the current address information of the mobile node from the mobile node and sending the current address information of the mobile node to the opposite node of the mobile node according to the opposite node information of the mobile node in the storage unit.
Correspondingly, the embodiment of the invention also provides a route optimization method of the mobile IP, which comprises the following steps:
receiving the current address information of the mobile node from the mobile node, and sending the current address information of the mobile node to an opposite node of the mobile node;
and the opposite node receives the current address information of the mobile node and takes the current address as the care-of address of the mobile node.
In the routing optimization system of the embodiment of the present invention, each node is configured with an MME of a home location, and the MME sends a message carrying a current address of a mobile node from the mobile node to an opposite node of the mobile node according to stored opposite node information of the mobile node, and instructs the opposite node to use the current address as a care-of address of the mobile node. Therefore, the information of the current address of the mobile node carried in the Binding Update (BU) signaling message in the embodiment of the present invention is finally sent to one or more CNs through the MN, the mobility management entity (MME/MN) of the mobile node home location, and the mobility management entity (MME/CN) of the correspondent node home location, and signaling transmission can be easily protected, which is specifically as follows:
because the signaling interaction between the MME/MN and the MN belongs to the communication between the mobile node and the network managed by the same operator, the signaling protection can be carried out by pre-establishing a security alliance, for example, adopting a security mechanism (IPsec);
similarly, the same method can be adopted between MME/CN and CN to carry out signaling transmission protection;
for the communication path between the MME/MN and the MME/CN, because the trust relationship of mutual negotiation exists between different operators, the signaling transmission on the path can be protected by a method of establishing a security tunnel between the MME/MN and the MME/CN after the negotiation. Moreover, the secure tunnel is established on the wired network, and the establishment can continue until the trust relationship negotiated among the operators expires, so that the transmission delay of the BU message is not increased.
In summary, since the whole BU message signaling transmission process has security protection, a round-trip Routability Procedure (RRP) is no longer needed, and the binding update time is shortened; meanwhile, no new security threat is introduced, the security level is improved, on-path attack can be prevented, the life cycle of binding update is prolonged, 86400 seconds can be achieved to the maximum extent, namely the effective time of the HoA prefix of the MN is prolonged, and the signaling overhead caused by frequent binding update is reduced.
Drawings
FIG. 1 is a diagram illustrating a prior art interworking of data between a mobile node and a correspondent node;
fig. 2 is a schematic diagram of a first embodiment of the communication system of the present invention;
fig. 3 is a network architecture diagram of an applied embodiment of the first embodiment of the communication system of the present invention;
fig. 4 is a schematic diagram of a second embodiment of the communication system of the present invention;
fig. 5 is a schematic diagram of a network architecture of an application embodiment of a second embodiment of the communication system of the present invention;
fig. 6 is a schematic diagram of a first embodiment of the mobility management entity of the present invention;
fig. 7 is a schematic diagram of a second embodiment of the mobility management entity of the present invention;
fig. 8 is a schematic diagram of a third embodiment of the mobility management entity of the present invention;
fig. 9 is a schematic format diagram of a BU message movement option of an embodiment of the present invention;
fig. 10 is a schematic diagram of a fourth embodiment of the mobility management entity of the present invention;
fig. 11 is a flowchart illustrating a mobile IP route optimization method according to a first embodiment of the present invention;
FIG. 12 is a flowchart illustrating the detailed step of step s1 in FIG. 10;
fig. 13 is a flowchart illustrating a mobile IP route optimization method according to a second embodiment of the present invention;
fig. 14 is a format diagram of a BU message of an embodiment of the present invention;
fig. 15 is a schematic diagram of the format of the BA message according to the embodiment of the present invention.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
First, in the embodiment of the present invention, one end node of two end nodes communicating with each other is a Mobile Node (MN), and the other end node may be a fixed node or a mobile node, and is collectively referred to as a Correspondent Node (CN) in the embodiment of the present invention.
In addition, the information of the current address of the mobile node from the mobile node in the implementation of the present invention may be carried in a binding update message in practical applications, and the binding update message is taken as an example for description below.
Referring to fig. 2, the first embodiment of the communication system of the present invention is schematically illustrated, and the first embodiment of the present invention includes a Mobility Management Entity (MME) 1, which is deployed on a network side and is configured to receive current address information of a mobile node from the mobile node, and send the current address information of the mobile node to a corresponding node of the mobile node according to corresponding node information of the mobile node in the storage unit.
Fig. 3 is a network architecture diagram of an application embodiment of this embodiment, where Mobile Node represents a Mobile Node, MME/MN represents a mobility management entity of a home of the Mobile Node, DNS Server represents a domain name Server, Corresponding Nodes represent a correspondent Node, MME/CN represents a mobility management entity of a home of the correspondent Node, and forceign Link represents a Foreign Link.
When the mobile node moves, the mobility management entity of the mobile node home location first receives the binding update message of the mobile node 11, and then sends the binding update message to the mobility management entity of the mobile node home location according to the stored correspondent node information of the mobile node, and after receiving the binding update message, the mobility management entity of the correspondent node home location forwards the binding update message to the corresponding correspondent node.
It should be noted that, in the present application embodiment, the home locations of the mobile node and the corresponding node are different, that is, the mobile node and the corresponding node correspond to different mobility management entities, respectively, but in practical applications, the home location of the mobile node and the home location of the corresponding node may also be the same, that is, correspond to the same mobility management entity, and accordingly, the mobility management entity MME/MN of the home location of the mobile node in fig. 3 is the same as the mobility management entity MME/CN of the home location of the corresponding node.
In addition, the embodiment of the communication system of the present invention may further include a positioning Server 2, for example, a Domain Name Server (DNS), which stores information of the MME, as shown in fig. 4. In specific implementation, before sending a binding update message to a mobility management entity of a home location of a Corresponding Node, a mobility management entity of the home location of the Mobile Node queries a domain name Server to obtain MME information, such as an IP address, of each home location of the Corresponding Node.
In the following, a detailed description is made on an MME in an embodiment of the present invention, with reference to fig. 6, which is a schematic diagram of a first embodiment of a mobility management entity of the present invention, and mainly includes: the storage unit 21, the receiving unit 23, and the processing unit 22, where the storage unit 21 stores mobile node information, and when the mobile node is actually applied, the correspondent node information is a table entry (List), and when the mobile node registers with a home network, the mobile node may register information of the correspondent node, and the correspondent node information may be identified by an IP address, or may be identified by other means such as a Session Initiation Protocol (SIP) address or a domain name address, and if the mobile node is an IP address, the IP address of the CN in the List should be HoA and CoA of the CN, and if the CN is a fixed node, the IP address of the CN in the List should be a fixed address of the CN;
the processing unit 22 sends the current address information of the mobile node received by the receiving unit 23 to the correspondent node of the mobile node according to the correspondent node information of the mobile node stored by the storage unit 21, and instructs the correspondent node to update the binding between the home address and the care-of address of the mobile node. In this embodiment, we assume that the current address information of the mobile node is carried in a binding update message, and then the processing unit 22 actually sends the binding update message to the correspondent node of the mobile node.
Referring to fig. 7, which is a schematic diagram of a second embodiment of the mobility management entity of the present invention, the second embodiment also includes, as in the first embodiment: : a storage unit 21, a receiving unit 23, and a processing unit 22.
When the processing unit 22 is specifically implemented, after receiving a binding update message of a mobile node, determining an opposite end node to be updated and bound according to the stored information of each end node of the mobile node, acquiring mobility management entity information of a home location of the opposite end node to be updated and bound, and sending the binding update message according to the mobility management entity information of the opposite end node, if the mobility management entity information of the opposite end node indicates that the home location of the opposite end node is the same as that of the mobile node, directly sending the update message to the opposite end node, otherwise, sending the binding update message to the opposite end node through the mobility management entity of the home location of the opposite end node; or when receiving the binding update message from the MME of the mobile node home location, forwarding the binding update message from the mobility management entity of the mobile node home location to the corresponding opposite node; or forwarding the binding update message from the correspondent node to the corresponding mobile node.
As shown in fig. 7, the processing unit 22 mainly includes: a policy determination unit 2211, a judgment processing unit 2212, and a transmission unit 2213;
in concrete implementation, first, after receiving the current address information of the mobile node from the mobile node, the policy determining unit 2211 determines, through interaction with an upper application layer, a policy for sending the current address information to a corresponding node of the mobile node, then, the determining processing unit 2212 determines whether the storage unit 21 stores mobility management entity information of the determined corresponding node home location, if so, obtains the mobility management entity information of the corresponding node home location, otherwise, obtains the mobility management entity information of the corresponding node home location through interaction with a positioning server, and finally, the sending unit 2213 determines, according to the mobility management entity information of the corresponding node home location obtained by the determining processing unit 2212, if the determined corresponding node and the mobile node belong to the same home location, the current address information is sent to the selected correspondent node according to the policy determined by the policy determining unit 2211, otherwise, the current address information is sent to the selected correspondent node through the mobility management entity of the determined correspondent node home location according to the policy determined by the policy determining unit 2211.
It should be noted that, after receiving the current address information of the mobile node from the mobile node (i.e. receiving the binding update message), the policy determining unit 2211 determines, according to the saved information of each pair of end nodes of the mobile node, a policy for sending the current address information to the corresponding node of the mobile node by interacting with an upper application layer, and selects to which corresponding node to send the binding update message, for example, may select to send a BU message to N registered CNs that have recently communicated, or to send a BU message to a CN that is registered by an online mobile terminal, so as to improve the efficiency of BU signaling transmission.
In addition, in the present embodiment, the setting of the determination processing unit 2212 fully considers that the information list of the correspondent node registered by the mobile node stored in the storage unit 21 may include, in addition to the HoA of the CN, the MME address of the CN home location associated with the CN, and at this time, the MME information of the correspondent node home location may be directly acquired from the information list, and it is no longer necessary to query a positioning server, such as a Domain Name Server (DNS), to acquire the MME address of the CN home location, thereby reducing signaling overhead.
Referring to fig. 8, which is a schematic diagram of a third embodiment of the mobility management entity of the present invention, in this embodiment, the mobility management entity includes the same functional modules as in the embodiment, and the processing unit 22 further includes:
a correspondent node information editing unit 2214, configured to add, delete, or modify the correspondent node information of the mobile node in the storage unit. That is, when the binding update message carries an instruction to add the corresponding node to the storage unit, or delete the mobile option of the corresponding node already stored in the storage unit, the information of the corresponding node is deleted or added according to the mobile option.
In this embodiment, the problem of updating the correspondent node information list is fully considered, and the CN information can be updated through the BU message as needed, and in addition, when the mobile node is registered with the home network and no correspondent node information is initialized, that is, when the content of the storage unit 21 is empty, the CN information can also be added through the mobile option in the BU message.
In addition, as shown in fig. 9, when a CN node needs to be added, the format of the BU message mobile option has a mobile option Type (Type) value of 6, and includes the main information as the IP address of the CN to be added, and if the CN is a mobile node, includes the HoA of the CN; when deleting a CN node, the value of Type in the mobile option is 7, and the message mainly comprises the IP address of the CN to be deleted.
When the storage unit 21 stores the MME address of the CN home location, if the CN needs to be added, the BU message move option needs to include the MME address of the CN home location in addition to the HoA of the CN to be added; if the CN needs to be deleted, the mobile option may include the HoA of the CN to be deleted.
In addition, the MME in the implementation of the present invention may further provide a location-hidden service to the MN, as shown in fig. 10, which is a diagram illustrating a fourth embodiment of the mobility management entity of the present invention, and the embodiment is different from the first embodiment of the mobility management entity in that the MME further includes a packet processing unit 24, configured to receive a packet from a correspondent node of a mobile node, and send the packet to the mobile node through a tunnel between the mobile node and the entity. That is, when the correspondent node for currently sending a packet to the mobile node does not belong to the correspondent node of the mobile node already stored in the storage unit 21, the mobility management entity to which the mobile node belongs intercepts the packet from the correspondent node and sends the packet to the mobile node through the tunnel with the mobile node, so that the MME is compatible with the functions of all the HAs, and HAs strong portability and extensibility.
In addition, although the MME in the embodiment of the present invention has a packet processing unit, the MME is mainly used to replace the MN to send a BU message to the CN, and does not participate in packet transmission in most cases, so that the MME realizes separation of a control plane and a user plane, which is beneficial to flattening of communication.
Referring to fig. 11, it is a schematic flowchart of a mobile IP route optimization method according to a first embodiment of the present invention, where the flowchart includes:
step s1, receiving the current address information of the mobile node from the mobile node, and sending the current address information of the mobile node to the opposite node of the mobile node;
step s2, the correspondent node receives the current address information of the mobile node, and takes the current address as the care-of address of the mobile node.
FIG. 12 shows a specific implementation flow of step s1, which includes the following steps
Step s11, receiving the current address information of the mobile node from the mobile node;
step s12, determining a policy for sending the current address information to a correspondent node of the mobile node;
step s13, determining the mobility management entity information of the correspondent node home location;
step s14, determining whether the peer node and the mobile node belong to the same home location, if yes, executing step s15, otherwise executing step s 16;
step s15, sending the current address information of the mobile node to the opposite node according to the strategy;
step s16, sending the current address information of the mobile node to the opposite node through the mobility management entity of the opposite node attribution according to the strategy.
Wherein, the steps s12 and s13 further include:
step s121, determining the correspondent node receiving the address information according to the current address information of the mobile node from the mobile node, and acquiring the information of the selected correspondent node from the saved information of each correspondent node of the mobile node;
step s122, according to the information of the selected correspondent node, determining whether the mobility management entity information of the home location of the selected correspondent node is stored, if so, acquiring the mobility management entity information of the home location of the selected correspondent node, otherwise, interacting with a positioning server to acquire the mobility management entity information of the home location of the correspondent node.
After step s2, the correspondent node communicates packets with the mobile node in accordance with the updated binding of the mobile node's home address and care-of address. Here, if the CN that sends a packet to the MN is not the CN that the MN is registered with, that is, if the correspondent node information that sends a packet to the mobile node is not currently stored, the MME of the MN home location receives the packet and tunnels the packet to the MN in order to hide the address of the MN.
It should be noted that, under the conditions that the MN location changes, the service requirement or the binding lifetime is about to expire, the MN may initiate a BU message to the MME/MN.
As shown in fig. 13, the MME of the MN home location is represented by MME/MN, and the MME of the CN home location is represented by MME/CN, the second embodiment of the mobile IP routing optimization method of the present invention includes the following procedures:
step s21, the MN sends a BU message to the MME/MN;
step s22, after the MME/MN performs security check on the BU message, updating the binding of the MN;
step s23, MME/MN replies BA message to the MN;
step s24, the MME/MN obtains CN information of the MN, determines which CNs in the stored CNs need to update the binding of the MN, and obtains information of the CN to which the MN is bound to be updated, where the CN information may be HoA of the CN. During specific implementation, a policy for determining to send the current address information to the correspondent node of the mobile node is interacted with an upper application layer, for example, BU messages can be sent to N recently communicated registered CNs, or BU messages can be sent to on-line mobile terminal registered CNs, so that the efficiency of BU signaling transmission is improved;
step s25, the MME/MN sends a request for MME/CN to the DNS according to the acquired HoA of the CN bound by the MN to be updated, and inquires the address of the MME/CN registered by the mobile terminal;
step s26, DNS replies response to MME/MN, and replies MME/CN address to MME/MN;
step s27, the MME/MN sends BU message to the MME/CN through the tunnel between the MME/CN and the MME/CN according to the address of the MME/CN;
step s28, the MME/CN forwarding the BU message to one or more corresponding CNs indicated in said BU message;
step s29, the CN updates the binding cache according to the received BU, and when the implementation is specific, the CN determines whether to reply the BA message according to the value of the "a" bit of the BU message after receiving the BU message, as shown in fig. 14, which is a basic format of the BU message, if the a bit is set, the BA message is replied, otherwise, the BA message is not replied.
It should be noted that, in this embodiment, the home locations of the mobile node MN and the correspondent node CN are different, that is, the MN and the CN correspond to different mobility management entities respectively, but in practical application, the home location of the MN and the CN may also be the same, that is, the MN and the CN correspond to the same mobility management entity, and accordingly, after the step s25, before the step s26, the method further includes: sending the binding update message according to the mobility management entity information of the correspondent node, if the mobility management entity information of the correspondent node indicates that the home location of the correspondent node is the same as that of the mobile node, sending the current address information of the mobile node to the correspondent node according to the policy, otherwise, executing step s 26;
in addition, the CN information of MN registration saved by the MME/MN in the embodiment of the present invention may also be updated, and when the specific implementation is implemented, the CN information is carried in the BU message, and accordingly after the step s22 receives the BU message from the MN, the CN indicated in the mobile option is deleted or added according to the Type of the mobile option, if the Type (Type) value of the mobile option is 6, the CN indicated in the mobile option is added to the CN information table registered by the MN, and if the Type value of the mobile option is 7, the CN indicated by the mobile option is deleted; therefore, the opposite node is deleted or added according to the mobile option, if the BU message is only used for deleting the CN node information list, the MME/MN does not send the BU message of the MN to the CN in the list after receiving the BU message; if the BU message is to add a CN node into the List, the MME/MN also sends the BU message of the MN to the newly added CN node after the List addition processing is carried out on the MME/MN;
correspondingly, step s23, the MME/MN returns a BA message to the MN, where the BA message carries a relevant status code, to indicate an update condition of the CN information table registered by the MN, for example, if the BA message carries a number 2, it indicates that the addition is accepted; if the number is 3, the deletion is accepted; if the number 140 is carried, the addition is rejected; if the number 141 is carried, it indicates that deletion is rejected, etc., as shown in fig. 15, which is a schematic diagram of a BA message carrying a status code, wherein
Mobility Option: representing a move option;
sequence #: represents a serial number;
life time: indicating the survival time of the binding cache;
status: the status, i.e. the status code in the embodiment of the present invention, is, for example:
1)2, indicating that the addition of the table entry is accepted;
2)3, receiving the deletion of the table entry;
3)140, indicating rejection of entry addition;
4)141, indicating rejection of entry deletion;
in addition, the following briefly describes the basic format of the BU message in step s28, as shown in fig. 13:
mobility Option: representing a move option;
sequence #: represents a serial number;
life time: indicating the survival time of the binding cache;
reserved: represents a reserved bit;
a: represents a bit;
h: represents an H bit;
l: represents L bits;
k: represents K bits;
in summary, according to the embodiments of the communication system, the mobility management entity, and the mobile IP routing optimization method of the present invention, since the whole BU message signaling transmission process has security protection, a round-trip Routability Procedure (RRP) is not needed any more, and the binding update time is shortened; meanwhile, no new security threat is introduced, the security level is improved, on-path attack can be prevented, the life cycle of binding update is prolonged, 86400 seconds can be achieved to the maximum extent, namely the effective time of the HoA prefix of the MN is prolonged, and the signaling overhead caused by frequent binding update is reduced.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims (9)

1. A mobility management entity, comprising:
the storage unit is used for storing opposite end node information of the mobile node;
a receiving unit for receiving current address information of a mobile node from the mobile node;
a processing unit, configured to send the current address information of the mobile node received by the receiving unit to an opposite node of the mobile node according to the opposite node information of the mobile node in the storage unit;
wherein,
the processing unit includes:
a policy determining unit, configured to determine, after receiving current address information of a mobile node from the mobile node, a policy for sending the current address information to an opposite node of the mobile node;
a judging and processing unit, configured to judge whether the storage unit stores mobility management entity information of a determined correspondent node home location, if so, obtain the mobility management entity information of the correspondent node home location, and otherwise, interact with a positioning server to obtain the mobility management entity information of the correspondent node home location;
a sending unit, configured to judge according to the mobility management entity information of the correspondent node home location acquired by the judgment processing unit, if the determined correspondent node and the mobile node belong to the same home location, send the current address information to the selected correspondent node according to the policy determined by the policy determining unit, otherwise, send the current address information to the selected correspondent node through the mobility management entity of the determined correspondent node home location according to the policy determined by the policy determining unit.
2. The mobility management entity of claim 1, wherein the processing unit further comprises:
and the opposite end node information editing unit is used for adding, deleting or modifying the opposite end node information of the mobile node in the storage unit.
3. The mobility management entity of claim 1, further comprising:
and the data packet processing unit is used for receiving a data packet from an opposite end node of the mobile node and sending the data packet to the mobile node through a tunnel between the mobile node and the entity.
4. A communication system, comprising: a mobility management entity, deployed on a network side, configured to receive current address information of a mobile node from the mobile node, and send the current address information of the mobile node to an opposite node of the mobile node according to opposite node information of the mobile node in a storage unit;
wherein,
the mobility management entity comprises:
the storage unit is used for storing opposite end node information of the mobile node;
a receiving unit for receiving current address information of a mobile node from the mobile node;
a processing unit, configured to send the current address information of the mobile node received by the receiving unit to an opposite node of the mobile node according to the opposite node information of the mobile node in the storage unit;
the processing unit includes:
a policy determining unit, configured to determine, after receiving current address information of a mobile node from the mobile node, a policy for sending the current address information to an opposite node of the mobile node;
a judging and processing unit, configured to judge whether the storage unit stores mobility management entity information of a determined correspondent node home location, if so, obtain the mobility management entity information of the correspondent node home location, and otherwise, interact with a positioning server to obtain the mobility management entity information of the correspondent node home location;
a sending unit, configured to judge according to the mobility management entity information of the correspondent node home location acquired by the judgment processing unit, if the determined correspondent node and the mobile node belong to the same home location, send the current address information to the selected correspondent node according to the policy determined by the policy determining unit, otherwise, send the current address information to the selected correspondent node through the mobility management entity of the determined correspondent node home location according to the policy determined by the policy determining unit.
5. The communication system of claim 4, further comprising:
and the positioning server is used for storing the information of the mobility management entity in the network.
6. A route optimization method for mobile IP is characterized by comprising the following steps:
a mobile management entity receives the current address information of the mobile node from the mobile node and sends the current address information of the mobile node to an opposite node of the mobile node;
the opposite node receives the current address information of the mobile node and takes the current address as the care-of address of the mobile node;
wherein,
the step of sending the current address information of the mobile node to the opposite node of the mobile node specifically includes:
determining a policy for sending the current address information to a correspondent node of the mobile node;
determining mobility management entity information of the home location of the opposite node;
if the opposite end node and the mobile node belong to the same home location, the current address information of the mobile node is sent to the opposite end node according to the strategy; otherwise, the current address information of the mobile node is sent to the opposite node through the mobile management entity of the attribution place of the opposite node according to the strategy.
7. The method for route optimization of mobile IP according to claim 6, comprising:
determining an opposite end node receiving the address information according to the current address information of the mobile node from the mobile node, and acquiring the information of the selected opposite end node from each pair of saved end node information of the mobile node;
and judging whether the selected mobility management entity information of the home location of the opposite node is stored or not according to the selected information of the opposite node, if so, acquiring the mobility management entity information of the home location of the selected opposite node, and otherwise, interactively acquiring the mobility management entity information of the home location of the selected opposite node with a positioning server.
8. The method for route optimization for mobile IP according to claim 6, further comprising:
receiving indication information from a mobile node, wherein the indication information indicates that information of a corresponding node of the mobile node is deleted or added;
and deleting or adding the information of the opposite end node according to the indication information.
9. The method for optimizing routing of mobile IP according to any one of claims 6 to 8, wherein when the correspondent node information of the packet currently sent to the mobile node is not saved, further comprising:
and the mobility management entity of the home of the mobile node receives the data packet from the opposite node and sends the data packet to the mobile node through a tunnel between the mobility management entity and the mobile node.
CN200710028253.XA 2007-05-29 2007-05-29 Mobility management entity, communication system and routing optimization method of mobile IP Expired - Fee Related CN101316222B (en)

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

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
CN101316222A CN101316222A (en) 2008-12-03
CN101316222B true CN101316222B (en) 2013-04-17

Family

ID=40074574

Family Applications (1)

Application Number Title Priority Date Filing Date
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

Country Status (2)

Country Link
CN (1) CN101316222B (en)
WO (1) WO2008145035A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN118174969B (en) * 2024-05-15 2024-08-13 山东仟淼信息技术有限公司 Data management method and system for network security test

Citations (3)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
WO2008145035A1 (en) 2008-12-04
CN101316222A (en) 2008-12-03

Similar Documents

Publication Publication Date Title
EP2250827B1 (en) A method and an apparatus for providing route optimisation
CN101268670B (en) Multihomed mobile node, homed proxy and method for enabling simultaneous use of home network and foreign network
US8379599B2 (en) Local mobility anchor relocation and route optimization during handover of a mobile node to another network area
JP5072864B2 (en) Communication system and domain management device
KR101410836B1 (en) Method and system for terminal handover in wireless communication system
US8169966B2 (en) Method and a network node for managing handovers in a packet data communication environment
US20110103260A1 (en) Binding cache creating method, binding cache creating system, home agent, and mobile node
WO2010041440A1 (en) Interface switching system, mobile node, proxy node, and mobile management node
US20150312383A1 (en) Handling multipath trasnmission control protocol signalling in a communications network
CN101383755B (en) Proxy mobile IPv6 switching method and related network entity
JP4990985B2 (en) Proxy mobile IP routing
JP2007534195A (en) Packet data communication
WO2009152669A1 (en) Method for realizing network switching and system and mobile node
WO2009116246A1 (en) Communication method, communication system, mobile node, access router
KR101031979B1 (en) Communication system
WO2010010695A1 (en) Mobile terminal and network node
CN101316222B (en) Mobility management entity, communication system and routing optimization method of mobile IP
KR20070034542A (en) Mobile terminal management device and mobile terminal and communication system
US7505770B2 (en) Mobile communication method and mobile communication apparatus
US20100316018A1 (en) Network-based handover control mechanism
Mavromoustakis et al. QoS in Next generation mobile networks: an analytical study
KR20090054145A (en) Method for performing fast handover traffic based on network
EP2068527A1 (en) Network control of an MAP selection and of a route selection in a Mobile IP environment
Yokota et al. Network Working Group H. Chan (Ed.) Internet-Draft Huawei Technologies Intended status: Informational D. Liu Expires: December 7, 2014 China Mobile P. Seite
WO2009116276A1 (en) Communication method, communication system, communication node, mobile communication device, mobile management device, and relay node

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130417

Termination date: 20140529