CN101352014A - Base station methods and apparatus for establishing connections - Google Patents
Base station methods and apparatus for establishing connections Download PDFInfo
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- CN101352014A CN101352014A CNA200680046425XA CN200680046425A CN101352014A CN 101352014 A CN101352014 A CN 101352014A CN A200680046425X A CNA200680046425X A CN A200680046425XA CN 200680046425 A CN200680046425 A CN 200680046425A CN 101352014 A CN101352014 A CN 101352014A
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Abstract
Methods and apparatus for establishing communication links, used to support communications sessions with one or more end nodes, e.g., mobile devices, are described. Various features are directed to a mobile node controlling the establishment of initial links to a first access node and the establishment of new links from a first access node to a second access node during a handoff operation using highly efficient messages and signal.
Description
Related application
The application requires the U.S. Provisional Patent Application S.N.60/725 that is entitled as " WIRELESS TERMINALMETHODS AND APPARATUS FOR ESTABLISHING CONNECTIONS ANDBASE STATION METHODS AND APPARATUS FOR ESTABLISHINGCONNECTIONS (wireless terminal methods that is used to connect and device and base station methods that is used to connect and device) " of submission on October 11st, 2005,589 rights and interests, this application is clearly included in this by reference.
Invention field
The present invention relates to communication system, relate in particular to and be used for the method and apparatus that the cordless communication network at for example cellular communications networks etc. connects.
Background of invention
Communication system usually comprises a plurality of network nodes that are coupled to access node, and for example the end node of mobile device etc. is coupled to network by these access nodes.Network node can be arranged into hierarchical structure.Access authentication is the node that is placed in relative higher stratum usually in this network level structure with mandate (AAA) server.They are provided for the information of fail safe and access control purpose usually.In the situation of using aaa server, access node usually has the safety chain with this type of server.This safety chain can pass the one or more nodes in this hierarchical structure.
Operator typically uses radius protocol and the RADIUS aaa server that is associated to come access session in the IP network management.In the future, aaa server may be based on the New Deal such as DIAMETER etc.In the system that uses the RADIUS aaa server, when the user attempts to obtain access to carrier network, during the access session lasts, local-access router sends one or more RADIUS to certificate server usually and inserts request, authenticates this user with the request authentication server based on user's the identity such as network access identifier (NAI) etc.The AAA database will be allowed to access the service features that those users' of its system identity can call in company with them usually and store together.As user during by success identity, its access interface on access device is configured to have the Policy Status that the authorization of service with this user matches.This authorization of service is normally delivered to couple in router via RADIUS by authorization server.When being authorized, the service during the access session is used by the couple in router record, and uses the book keeping operation request message in the radius protocol to send to the billed services device as accounting records.The billed services device can be the part of aaa server, and perhaps it can be the separate server that uses identical agreement with authorization server.If the user is connected to a plurality of couple in routers during individual session, then these a plurality of sessions need be assembled in the billed services device.
AAA system is distributed to couple in router with management ip address distribution (HoA), dynamic assignment HA (home agent), with MN (mobile node) overview and goes back distributing security keys with mobile IP (MIP) coupling usually and authenticates MIP message and protection airlink.Mobile node---promptly can change the end node of its point of network attachment---and typically sends MIP message and obtain access to system, this triggering authentication and authorize the AAA request of this mobile node.AAA MN overview and fail safe state are delivered to couple in router with the service of control by this MN consumption from AAA system subsequently.
MN can change its point of network attachment, for example, and along with they move to another cellular cell and do this change from a cellular cell.This relates to the attachment point of MN is changed to for example second access node of the second router etc. from first access node of for example the first router etc.This process is commonly called changes hand.As a part of changing hand, the CoA of MN (Care-of Address)/CCoA (co-located care-of address) need be updated and use the MIP signaling to be delivered among the HA subsequently, so that grouping is redirected to this MN via this new couple in router.As a part of changing the hand process, need with first couple in router change in the corresponding state information of MN related in the hand with this at least some pass to this new couple in router so that the MN service is not interrupted.This process is called state transfer.State transfer can comprise that for example before former is to deliver to this MN via RADIUS to insert the transmission of session in the AAA overview state information of that AR (couple in router) of its place's beginning.It also can comprise airlink security vectors for example, MN-NAI, MN IP address, MN-EUI-64, MIP registration residue lifetime, the qualification of MN multicast group members, access control state, resource reserved state, differentiated services state, SIP session status, compressor state, MN schedule history and/or because of the transmission of many other potential possible items of the different AR state information of MN.
In at least a known system, the transmission of state information is to reach to the original old access node transmit status pass-along message that connects of this mobile node by communication network by the new access node that mobile node is connecting during a handoff.In response to this, old access node is transmitted to new access node with state information.Alternatively, use core node to store and given mobile node associated state.When described mobile node attempted to shift to another target access node, described target access node can be from described core node retrieval and described mobile node associated state.
Be also referred to as MIPv4[MIPv4] and MIPv6[MIPv6] mobile IP (edition 4 and 6) make mobile node (MN) to register its temporary position to its home agent (HA) by Care-of Address (CoA) indication.Subsequently, the mapping (being also referred to as binding) between the CoA that HA keeps the permanent address of this MN---being also referred to as home address (HoA) in addition---and registered is so that can use IP encapsulation technology (tunnelling) to be redirected to its current location for the grouping of this MN.When using MIPv4, the employed CoA of MN can be the address that belongs to Foreign Agent (FA) in the couple in router, perhaps it can be the address of temporarily distributing to this MN oneself from the couple in router prefix, and it is called as co-located care-of address (CCoA) in this case.Back one model also can be applicable to MIPv4, though it is unique mode of operation in MIPv6.Attention: with regard to the purpose of this document, term CCoA and CoA and registration and Binding Update (BU) are interchangeable, because they are corresponding terms of MIPv4 and MIPv6.
Minimum possibility MIPv4 complies with login request message and comprises following at least header and field.
-IP header (at least 160 bit long)
-UDP header (at least 64 bit long)
UDP header continues with the mobile IP field shown in following: (at least 192 bit long)
0 1 2 3
0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| type | the S|B|D|M|G|r|T|X| lifetime |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| home address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| home agent |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Care-of Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
+ sign+
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| expansion
+-+-+-+-+-+-+-+-
Class1 (register requirement)
S binds simultaneously.If ' S ' bit is set, then mobile node is just asking home agent to keep its previous mobility binding.
B broadcast data newspaper.If ' B ' bit is set, then mobile node request home agent is given this mobile node with any broadcast data newspaper tunnelling that it receives on home network.
D is by the mobile node decapsulation.If ' D ' bit is set, then mobile node will oneself come decapsulation to send to the datagram of Care-of Address.That is, mobile node is using co-located care-of address.
The minimum encapsulation of M.If ' M ' bit is set, then its home agent of mobile node request uses minimum encapsulation [34] for the datagram of this mobile node to tunnelling.
G GRE encapsulation.If ' G ' bit is set, then its home agent of mobile node request uses GRE encapsulation [16] for the datagram of this mobile node to tunnelling.
R sends as zero; When receiving, be left in the basket.
T has asked reverse tunnel;
X sends as zero; When receiving, be left in the basket.
Lifetime
Be considered to remaining second number before expired in registration.Null value indication de-registration request.
The 0xffff value is indicated indefinite duration.
Home address
The IP address of mobile node.
Home agent
The IP address of the home agent of mobile node.
Care-of Address
The IP address of tunnel end.
Sign
By the numeral of 64 bits of mobile node structure, be used for register requirement answered with registration and be complementary, and the Replay Attack that is used to be protected from registration message.
Expansion (at least 176 bit long)
The standing part of register requirement continues one or more expansions.
Mandate is enabled expansion and must be received in all register requirement.
0 1 2 3
0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| type | length | SPI ....
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
... SPI (continuing) | authenticator ...
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Type
32
Length
4 add the byte number in the authenticator.
SPI
Security parameters index (4 byte).An opaque identifier.
Authenticator
The acquiescence identifying algorithm uses HMAC-MD5 to calculate " eap-message digest " of 128 bits of registration message.
The authenticator expansion
0 1 2 3
0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| type | length | SPI ....
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
... SPI (continuing) | authenticator ...
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Type
32
Length
4 add the byte number in the authenticator.
SPI
Security parameters index (4 byte).An opaque identifier.
Authenticator
The acquiescence identifying algorithm uses HMAC-MD5 to calculate " eap-message digest " of 128 bits of registration message.
More than shown minimum may MIPv4 to comply with login request message be 592 bit long, this can be at it for registration with change the purpose of hand and cause the poor efficiency utilization of resource must transmit by Radio Link the time.Attention: in practice, typical MIPv4 complies with login request message significantly greater than the minimum value that calculates, but described minimum value is to be used for the example illustration purpose.
Minimum possibility MIPv4 complies with registration reply message and comprises following at least header and field.
-IP header (at least 160 bit long)
-UDP header (at least 64 bit long)
UDP header continues with the mobile IP field shown in following: (at least 160 bit long)
0 1 2 3
0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| type | sign indicating number | the lifetime |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| home address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| home agent |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
+ sign+
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| expansion ...
-++-+-+-+-+-+-+-+-
Type 3 (registration is answered)
The result's of sign indicating number indication register requirement value.
Lifetime
If code field indication registration is accepted, then lifetime field be changed to registration be considered to expired before remaining second number.Null value indication mobile node is canceled.The 0xffff value is indicated indefinite duration.
Home address
The IP address of mobile node.
Home agent
The IP address of the home agent of mobile node.
Sign
The numeral of 64 bits is used for register requirement and registration answer are complementary, and the Replay Attack that is used to be protected from registration message.
Expansion (at least 176 bit long)
The standing part that registration is answered continues one or more expansions.Mandate is enabled expansion and must be included in all registration answers.
The authenticator expansion
0 1 2 3
0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| type | length | SPI ....
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
... SPI (continuing) | authenticator ...
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Type
32
Length
4 add the byte number in the authenticator.
SPI
Security parameters index (4 byte).An opaque identifier.
Authenticator
The acquiescence identifying algorithm uses HMAC-MD5 to calculate " eap-message digest " of 128 bits of registration message.
More than shown minimum may MIPv4 to comply with registration reply message be 560 bit long, this can be at it for registration with change the purpose of hand and cause the poor efficiency utilization of resource must transmit by Radio Link the time.Attention: in practice, typical MIPv4 complies with registration reply message significantly greater than the minimum value that calculates, but described minimum value is to be used for the example illustration purpose.
Also note: as those skilled in the art known, minimumly may mobile IP v 6 (MIPv6) comply with Binding Update (being equivalent to the MIPv4 register requirement) and may comply with login request message by MlPv4 greater than minimum.Note at last: as those skilled in the art known, minimumly may mobile IP v 6 (MIPv6) comply with binding Ack (being equivalent to MIPv4 registration response) and may comply with registration reply message by MlPv4 greater than minimum.
In view of above discussion, will be appreciated that need to be implemented in mobile node at first to network registry, be handed off to the situation of new access node or enter new and more high efficiency method from other situation of new cellular cell to access node that set up network link at mobile node.
Summary of the invention
The present invention is directed to and be used for the method and apparatus that between wireless terminal and access node, connects.
The whole bag of tricks of the present invention and device can be used for setting up communication link with one or more mobile nodes.The link of having set up can be used for supporting the communication session with one or more end nodes of for example mobile device etc.
Each novel feature is set up the mobile node method of initial link circuit to first access node at control.Further feature is at using very high efficiency message and signal partially to set up new link from first access node to what second access node changed hand as mobile node during changing manual manipulation.
Often be generated, use and store more than the mobile IPv 4 that can be used for carrying out similar tasks or short very high efficiency message each embodiment according to the present invention of IPv6 message.
Although some features are at wireless terminal methods and device, and be stored in the novel message of the present invention in the wireless terminal, further feature is the access node method and apparatus at novelty.
The present invention is also at the data storage device of for example memory devices etc. of storage one or more novel message of the present invention.
More features of the present invention and benefit are discussed in detailed description subsequently.
The accompanying drawing summary
Fig. 1 shows the network diagram of the example communication system that realizes according to the present invention.
Fig. 2 shows the example end node that realizes according to the present invention.
Fig. 3 shows the exemplary access node of realizing according to the present invention.
Fig. 4 shows the exemplary servers node of realizing according to the present invention.
Fig. 5 shows the example home agent node of realizing according to the present invention.
Fig. 6 shows according to the present invention the IP registration message that the exemplary size that realizes has been reduced.
Fig. 7 shows according to the present invention the IP registration reply message that the exemplary size that realizes has been reduced.
Fig. 8 shows the exemplary signaling of carrying out when an access node carries out the transition to another access node at end node according to of the present invention.
Describe in detail
Of the present invention be used for to access node set up to support with the link of the communication session of one or more end nodes of for example mobile device etc. and method of network connection and device can with the communication system coupling of wide range.For example, the present invention can with support such as the mobile communication equipment of the notebook that is equipped with modulator-demodulator, PDA etc. and system's coupling of supporting the various miscellaneous equipments of wave point for equipment mobility.
Fig. 1 shows according to the present invention the example communication system 100 of for example cellular communications networks realized etc., and this system comprises a plurality of nodes by the communication link interconnection.Node in this example communication system 100 uses the signal based on for example message of the communication protocol of for example Internet protocol (IP) etc. etc. to come exchange message.The communication link of system 100 can for example use lead, fiber optic cables and/or wireless communication technology to realize.This example communication system 100 comprises a plurality of end nodes 144,146,144 ', 146 ', 144 ", 146 ", they are via a plurality of access nodes 140,140 ', 140 " insert this communication system.End node 144,146,144 ', 146 ', 144 ", 146 " can be for example Wireless Telecom Equipment or terminal, and access node 140,140 ', 140 " can be for example wireless access routers or base station.Example communication system 100 also comprises other node 104,106,109,110 and 112 that several are used to provide interconnectivity or are used to provide special services or function.Especially specifically, this example communication system 100 comprises the transfer of the state that is used to support to relate to end node and the server 104 of storage.This server node 104 can be an aaa server, and perhaps it can be the context transfer server, and perhaps it can be the server that comprises the functional and context transfer server functionality of aaa server.
The example system 100 of Fig. 1 has described to comprise the network 102 of server 104, home agent node 109 and node 106, and all these nodes are connected to intermediate network node 110 by corresponding network link 105,108 and 107 respectively.It is interconnectivities of the network node of external node that intermediate network node 110 in the network 102 also provides from the angle of this network 102 via network link 111.Network link 111 is connected to another intermediate network node 112, and the latter is respectively via network link 141,141 ', 141 " be provided to a plurality of access nodes 140,140 ', 140 " further connectedness.
Each access node 140,140 ', 140 " be depicted as respectively via corresponding access link (145,147), (145 ', 147 '), (145 ", 147 ") provide branch to be clipped to the connectedness of a plurality of N of being end node (144; 146), (144 ', 146 '), (144 ", 146 ").In this example communication system 100, each access node 140,140 ', 140 " be drawn into and for example use that the wireless technology of wireless access links etc. provides access.Each access node 140,140 ', 140 " separately for example communications cell 148,148 ', 148 " etc. radio coverage area be illustrated as circle around corresponding access node.
This example communication system 100 is used as the basis of describing each embodiment of the present invention then.Alternative embodiment of the present invention comprises various network topologies, and what the interconnectivity between the number of the number of the number of network node and type, access node and type, end node and type, server and ownership or other agency's number and type, quantity of links and type and the node can be with example communication system 100 depicted in figure 1 therein is different.
In each embodiment of the present invention, some in the functional entity depicted in figure 1 can be omitted or make up.Position or the layout of these functional entitys in network is also convertible.
Fig. 2 provides the detailed diagram to the example end node 200 of for example mobile node of realizing according to the present invention etc.The example end node of describing in Fig. 2 200 is to can be used as end node 144,146,144 ', 146 ', 144 depicted in figure 1 ", 146 " in the detailed expression of any one device.In the embodiment of Fig. 2, end node 200 comprises processor 204, wireless communication interface 230, user's input/output interface 240 and the memory 210 that is coupled by bus 206.Correspondingly, via bus 206, each assembly exchange information, signal and the data of end node 200.The assembly 204,206,210,230,240 of end node 200 is positioned at frame 202 inside.
The intraware that wireless communication interface 230 provides end node 200 by means of its can to/from the external equipment of for example access node etc. with network node sends and the mechanism of received signal.For example, wireless communication interface 230 comprises the receiver circuit 232 and the transmitter circuitry 234 with corresponding transmitting antenna 238 that is used for end node 200 is coupled to via for example radio communication channel the corresponding reception antenna 236 of having of other network node.
The operation of control end node 200 is to carry out various as discussed below signalings and processing under the control of the various modules of for example routine of processor 204 in being included in memory 210 etc.The module that is included in the memory 210 is carried out when starting or is carried out by other module invokes the time.Module is exchange data, information and signal when being performed.Module is gone back shareable data and information when being performed.In the embodiment of Fig. 2, the memory 210 of end node 200 of the present invention comprises signaling/control module 212 and signaling/control data 214.
Signaling/control module 212 control signal relevant with the signal that receives and send for example message that is used for controlled state information stores, retrieval and processing etc. generates and processing.The message that is stored in the memory 210 comprises connection request message 610, connection response message 660, IP registration message 800 and IP registration reply message 900. Message 800 and 900 can be message---for example small-sized message that size of the present invention has been reduced, and they are littler than mobile IP v4 of routine and/or v6 message.The message that is stored in the memory can be the message that is generated and/or receive.These message will discuss in more detail following.Signaling/control data 214 comprises state information, for example parameter, state and/or the out of Memory relevant with the operation of end node.Particularly, signaling/control data 214 can comprise the configuration information 216 of end node identification information etc. for example and for example about operation information 218 of information of situation of current treatment state, unsettled response etc. etc. or the like.Module 212 addressable and/or modification data 214 are for example upgraded configuration information 216 and/or operation information 218.
Fig. 3 provides the detailed diagram of the exemplary access node of realizing according to the present invention 300.Exemplary access node 300 depicted in figure 3 is to can be used as access node 140,140 ', 140 depicted in figure 1 " in the detailed expression of any one device.In the embodiments of figure 3, access node 300 comprises processor 304, memory 310, network/internetwork interface 320 and the wireless communication interface 330 that is coupled by bus 306.Correspondingly, via bus 306, each assembly exchange information, signal and the data of access node 300.The assembly 304,306,310,320,330 of access node 300 is positioned at frame 302 inside.
The intraware that network/internetwork interface 320 provides access node 300 by means of its can to/from external equipment with network node sends and the mechanism of received signal.Network/internetwork interface 320 comprises receiver circuit 322 and the transmitter circuitry 324 that is used for via for example copper cash or fibre circuit etc. node 300 being coupled to other network node.The intraware that wireless communication interface 330 also provides access node 300 by means of its can to/from the external equipment of for example end node etc. with network node sends and the mechanism of received signal.Wireless communication interface 330 comprises receiver circuit 332 that for example has corresponding reception antenna 336 and the transmitter circuitry 334 with corresponding transmitting antenna 338.This interface 330 is used for via for example radio communication channel access node 300 being coupled to other network node.
The operation of control access node 300 is to carry out various signalings and processing under the control of each module of for example routine of processor 304 in being included in memory 310 etc.Be included in that module in the memory 310 is performed or be performed during in other module invokes that may be appeared in the memory 310 when starting.Module is exchange data, information and signal when being performed.Module is gone back shareable data and information when being performed.In the embodiments of figure 3, the memory 310 of access node 300 of the present invention comprises state management module 312 and signaling/control module 314.Corresponding in these modules each, memory 310 also comprises state management data 313 and signaling/control data 315.The message that is stored in the memory 310 comprises connection request message 610, connection response message 660, IP registration message 800 and IP registration reply message 900. Message 800 and 900 can be message---for example small-sized message that size of the present invention has been reduced, and they are littler than mobile IP v4 of routine and/or v6 message.Memory 310 also comprises mobile IPv 4 and/or mobile IP v 6 registration message 680.The message that is stored in the memory can be the message that is generated and/or receive.These message will discuss in more detail following.
Other operation of signaling/control module 314 control such as basic radio function, network managements etc. required to go to by wireless communication interface 330/from end node and by network/internetwork interface 320 go to/from the Signal Processing of other network node.Signaling/control data 315 comprises end-node related data and other network related data that for example relates to the wireless channel assignment of basic operation, such as the address of support/management server, about the configuration information of basic network communication etc.Signaling/control module 314 addressable and/or modification signaling/control datas 315.
Fig. 4 provides the detailed diagram of the exemplary servers node of realizing according to the present invention 400.Exemplary servers node 400 depicted in figure 4 is the detailed expressions that can be used as the device of server 104 depicted in figure 1.In the embodiment of Fig. 4, server node 400 comprises processor 404, memory 410, the network/internetwork interface 420 that is coupled by bus 406.Correspondingly, via bus 406, each assembly exchange information, signal and the data of access node 400.The assembly 404,406,410,420 of access node 400 is positioned at frame 402 inside.
The intraware that network/internetwork interface 420 provides server node 400 by means of its can to/from external equipment with network node sends and the mechanism of received signal.Network/internetwork interface 420 comprises receiver circuit 422 and the transmitter circuitry 424 that is used for via for example copper cash or fibre circuit etc. node 400 being coupled to other network node.
The operation of Control Server 400 is to carry out various signalings and processing under the control of each module of for example routine of processor 404 in being included in memory 410 etc.Be included in that module in the memory 410 is performed or be performed during in other module invokes that may be appeared in the memory 410 when starting.In the embodiment of Fig. 4, the memory 410 of server 400 of the present invention comprises kernel state administration module 412 and kernel state management data 413 and AAA module 415.
412 controls of kernel state administration module are to being received from the Signal Processing that relates to state storage and retrieval of other server, access node or network node.Kernel state management data 413 comprises for example end node state information.This kernel state administration module 412 is addressable and/or revise this kernel state management data 413.
Fig. 5 shows the example home agent node of realizing according to the present invention 500.Example home agent node 500 can be used in the system of Fig. 1, for example as the home agent node 109 that serves as home agent.In the embodiment of Fig. 5, home agent node 500 comprises input/output interface 501, processor 503 and the memory 507 that is coupled by bus 502.The element 501,502,503 and 507 of home agent node 500 be positioned at for example plastics and/or metal shell etc. by frame 508 inside of representing around the rectangle of the inner member 501,502,503 of node and 507.Correspondingly, via bus 502, each assembly exchange information, signal and the data of access node 500.Input/output interface 501 comprises and is used for for example via fibre circuit etc. node 500 being coupled to other network node and for example via potential Circuits System that possibly it is coupled to end node such as communication channels.
The operation of control home agent node 500 is to carry out various signalings, route and will be in other operation described below under the control of each module of for example routine of processor 503 in being included in memory 507 etc.The module that is included in the memory 507 is performed or is performed by other module invokes the time when starting.Module is exchange data, information and signal when being performed.Module is gone back shareable data and information when being performed.In the embodiment of Fig. 5, the memory 507 of home agent node 500 of the present invention comprises mobility agent module 506, and this module for example comprises and mutual and/or communicate by letter relevant parameter, communication session and/or end node state information, safety information and/or the out of Memory of end node with access node and/or other equipment.Mobility agent module 506 also comprise the home address that comprises end node and the mapping between the Care-of Address etc. because of the different state of end node.
Fig. 6 shows according to the present invention the IP registration message 800 that the exemplary size that realizes has been reduced.As shown in the present, although described message 800 is connective and to be redirected for the purpose of mobile IP tunnel be enough for setting up network layer, its size in addition may mobile IPv 4 than in the minimum shown in background one joint to comply with login request message also little.The IP registration message 800 that exemplary size has been reduced comprises: message type field 810, reserved field 820, " D " (cancellation) field 830, " I " (initially) field 840, message identifier 850 and zero or a plurality of optional expansion 860.
Reserved field 820 is retained for using in the future.In one embodiment of the invention, the value person of being sent out of reserved field 820 is changed to zero, and the person of being received ignores.
" D " (cancellation) field 830 comprises that this message of indication is the value that sends for the registered network layer or for the network layer of nullifying previous registration.
" I " (initially), field 840 comprised that this message of indication is at the initial registration message of this network layer or at the value of the follow-up registration of the network layer of having set up not long ago.
Can include zero or a plurality of optional expansion 860 in, these expansions can comprise various additional parameters.In some exemplary embodiment of the present invention, this type of expansion comprises that access node that identification message 800 mail to (for example, the end node of the target access node identifier extension 870 target access node 530 among Fig. 8), sign transmission message 800 (for example, end node 510 among Fig. 8) expansion of the authenticator of the last access node identifier extension 880 of the access node (for example, the access node among Fig. 8 520) that connects at the network layer place at last and authentication message 800 890.In certain embodiments of the present invention, each in the described expansion 870 and 880 all comprise at least the type of its value sign expansion type field, its value sign expansion length length field, with and value identify target access node and the identifier field of one of access node at last.In some this type of embodiment of the present invention, authenticator expansion 890 comprise at least the type of its value sign expansion type field, its value sign expansion length length field, with and the value cryptography authenticate the authenticator field of this message; Described authentication field value is based on that between sender and the recipient cipher key shared calculates.In some exemplary embodiment of the present invention, last access node identifier extension 880 is not included into when the value Indication message 800 of " I " field 840 is initial registration, and last access node identifier extension 880 is included into when the value Indication message 800 of " I " field 840 is not initial registration.In certain embodiments of the present invention, authenticator expansion 890 is optional expansions, so it can be omitted from message 800.The various combinations that can choose expansion wantonly are possible, and each embodiment according to the present invention comprises zero, one, two or three expansions 890 etc.
In one exemplary embodiment of the present invention, message type field 810 is 8 bit long, reserved field 820 is 14 bit long, " D " field 830 is signs of 1 bit long, " I " field 840 is signs of 1 bit long, and message identifier 850 is made of the sequence number of 16 bits and the timestamp of 32 bits.In same embodiment of the present invention, in the time can choosing expansion, target access node identifier 870 wantonly and access node identifier 880 is received in the message 800 at last, the identifier of the type field of their each free 8 bits, the length field of 8 bits and maximum 64 bits constitutes.In same embodiment of the present invention, when optional authenticator expansion 890 was received in the message 800, it comprised the type field of 8 bits, the length field of 8 bits and the authenticator of maximum 64 bits.In same embodiment of the present invention, the maximum length of the IP registration message 800 that size has been reduced is 312 bits, and this significantly may comply with login request message by MIPv4 less than the minimum that proves 592 bit long in background one joint.
Fig. 7 shows according to the present invention the IP registration reply message 900 that the exemplary size that realizes has been reduced.As shown in the present, although described message 900 is connective and to be redirected for the purpose of mobile IP tunnel be enough for setting up network layer, its size in addition may mobile IPv 4 than in the minimum shown in background one joint to comply with registration reply message also little.The IP registration reply message 900 that exemplary size has been reduced comprises: message type field 910, message identifier field 920, answer code field 930, reserved field 940, lifetime field 950 and zero or a plurality of optional expansion 960.
Reserved field 940 is retained for using in the future.In a certain embodiment of the present invention, the value person of being sent out of this reserved field 940 is changed to zero, and the person of being received ignores.
Can include zero or a plurality of optional expansion 960 in, these expansions can comprise various additional parameters.In certain embodiments of the present invention, these expansions comprise that home address extension 970 that the IP address (for example, the IP address of end node 810 among Fig. 8) that is associated by the recipient with message 900 constitutes, sign provide the home agent address extension 980 of address of mobile IP home agent of service and the authenticator expansion 990 of authentication message 900 to expanding the home address that comprises in 970.In some exemplary embodiment of the present invention, the length field that each in the described expansion 970 and 980 comprises the type field of the type of its value sign expansion, length that its value sign is expanded at least with and the address field of value representation IP address.In some this type of embodiment of the present invention, authenticator expansion 990 comprise at least the type of its value sign expansion type field, its value sign expansion length length field, with and the value cryptography authenticate the authenticator field of this message; Described authentication field value is based on that between sender and the recipient cipher key shared calculates.In some exemplary embodiment of the present invention, only 900 of message in response to the IP registration message 800 that reduced of corresponding size in the value indication of " I " field 840 when being initial registration home address extension 970 and home agent address extension 980 just be included into, and 900 of message in response to the IP registration message 800 that reduced of corresponding size in the value of " I " field 840 indicate that home address extension 970 and home agent address extension 980 are not included into when being follow-up registration.The various combinations of optional expansion are possible, each embodiment according to the present invention comprise the zero of expansion in 970,980,990, one, two or three.
In one exemplary embodiment of the present invention, message type field 910 is 8 bit long, and message identifier 920 comprises the sequence number of 16 bits, and answer code field 930 is 8 bit long, and reserved field 940 is 8 bit long, and lifetime field 950 is 16 bit long.In same embodiment of the present invention, when optional expansion home address 970 and home agent address 980 were received in the message 900, they comprised the type field of 8 bits, the length field of 8 bits and the IP address of maximum 32 bits separately.In same embodiment of the present invention, when optional authenticator expansion 990 was received in the message 900, it comprised the type field of 8 bits, the length field of 8 bits and the authenticator of maximum 64 bits.In same embodiment of the present invention, the maximum length of the IP registration reply message 900 that size has been reduced is 232 bits, and this significantly may comply with registration reply message by MIPv4 less than the minimum that proves 560 bit long in background one joint.
Fig. 8 shows the exemplary signaling of carrying out according to exemplary embodiment of the present invention.These signalings are shown in the background of the example system shown in Fig. 1 100.End node 510 is corresponding to the end node 144,146,144 ', 146 ', 144 of example system 100 ", 146 " in any one, and be to realize that according to the example end node of Fig. 2 200 realize.Access node 520 and target access node 530 are that the simplification of the exemplary access node 300 of Fig. 3 realizes, and corresponding to the access node in the example system 100 of Fig. 1 140,140 ', 140 " in any one.Server 540 is that the simplification of the server 400 among Fig. 4 realizes, and corresponding to the server in the example system among Fig. 1 100 104.Home agent node 550 is the reduced representation of the home agent 500 among Fig. 5 and corresponding to the home agent node 109 in the example system among Fig. 1 100.
In Fig. 8, vertically solid line 511,521,531,541 and 551 is represented node 510,520,530,540 and 550 with time form, represents early than the time of described each line in those parts of Fig. 8 bottom in those parts at Fig. 8 top at this line 511,521,531,541 and 551.Signal between solid horizontal line 610,620,640,660,670,680,690,700,710 and the 720 expression nodes 510,520,530,540 and 550.The wide line 600,630 and 650 of double-head arrow is illustrated in the ensemble of exchange between node 510,520,530,540 and 550.The replacement signal of dash line 621 and 641 expression signals 620 and 640.But dotted line 630 and 650 expression optional signals.If the line of expression signal or ensemble is indicated a point on the ordinate of representing described node with time form, then this signal is transmitted between two nodes.For example, signal 610 is transmitted at time 610a by end node 510, and is received at time 610c by target access node 530.
To describe physical layer now sets up.In Fig. 8, end node 510 transmits the signal that inserts to described node 530 request physical layers as the part of ensemble 600 at a 600a to target access node 530.Target access node 530 receives this signal as the part of ensemble 600 at a 600c, and transmits to end node 510 and to grant another signal that physical layers insert as the part of ensemble 600 to end node 510.
To describe link layer now sets up.End node 510 transmits connection request (Connections Request) message 610 at a 610a to target access node 530, sets up link with request with target access node 530 and communicates by letter with media access control layer.In some exemplary embodiment of the present invention, connection request message 610 comprises first identifier that identifies end node 510.In certain embodiments of the present invention, described message 610 also comprises sign end points 510 previous second identifiers of having set up the access node of for example access node 520 grades that connect with it.Described target access node 530 receives connection request message 610 at a 610c, and the parameter (for example, identifier) that be included in the described message 610 this moment is stored in the memory of target access node 530.In other exemplary embodiment of the present invention, message 610 is that access node or another access node (for example, access node 520) have been set up the hand request of changing (HandoffRequest) message of communication to indication end node 510 therewith in the early time.
Exemplary core context transfer embodiment will be described.At a 620c, described node 530 is to server 540 delivery status requests (State Request) message 620, with request mandate and other state corresponding to end node 530.Status request message 620 is included in a 610c and is stored in the parameter in the memory of node 530 at least some; For example, identifier of end node 510 etc.Server 540 receives status request message 620 at a 620d, and to its memory search and end node 510 associated state.At wherein server 540 of the present invention is in some exemplary embodiment of kernel state transfer service device, described server 540 transmits at some 640d and comprises the licensing status that is associated with end node 510 and the status response message 640 of other state (for example, security key, IP address and other parameter).Destination node 530 receives described message 640 and at least a portion with in end node 510 associated state that will be included in the message 640 is stored in its memory at a 640c.
Aaa server embodiment will be described.At wherein server 540 of the present invention is in some other exemplary embodiment of authentication and authorization (AAA) server, and server 540 is in the message of a 630d transmission as the proof of identification of the request end node 510 of the part that can choose group of messages 630 wantonly.Described node 510 receives as the message of the part of group of messages 630 and the proof of identification message that transmits as the part of group of messages 630 to server 540 at a 630a.In certain embodiments of the present invention, server 540 and end node 510 exchange end nodes 510 and server 540 both prove the additional messages of identity towards each other.When server 540 when a 640d has proved conclusively the identity of end node 510, its transmission comprises the message 640 of the authentication state that is associated with end node 510 and other state (for example, security key, IP address and other parameter).Target access node 530 receives described message 640 and at least a portion with in end node 510 associated state that will be included in the message 640 is stored in its memory at a 640c.
To exemplary reciprocity context transfer embodiment be described.In some exemplary embodiment of the present invention, target access node 530 is not to send message 620 but replace at a 621c to send message 621 to access node 520; Described access node 520 is last access nodes that end node 510 has connection with it.According to the present invention, described message 621 is included in a 610c and is stored in the parameter in the memory of node 530 at least some; For example, identifier of end node 510 etc.Access node 520 receives message 621 at a 621b, and to its memory search and end node 510 associated state.Described access node 520 transmits at some 641b and comprises the licensing status that is associated with end node 510 and the response message 641 of other state (for example, security key, IP address and other parameter).Destination node 530 receives described message 641 and at least a portion with in end node 510 associated state that will be included in the message 641 is stored in its memory at a 641c.
The optional security association stage of using in some embodiments of the invention will be described now.Among some embodiment that data traffic on the link between peer node 510 of the present invention and target access node 530 requires to encrypt, described node 530 transmits as the message that is used for setting up with end node 510 at least one encryption key that can choose the part of group of messages 650 wantonly at a 650c.Described node 510 receives to transmit as the key of the part of group of messages 650 as the message of the part of group of messages 650 and to target access node 530 at a 650a sets up message.In certain embodiments of the present invention, target access node 530 and end node 510 exchange additional messages are to set up this encryption key.
Finishing of link layer foundation will be described now.Target access node 530 sends connection response (Connection Response) message 660 at a 660c, grants link layer at least with peer node 510 and inserts.End node 510 receives described message 660 at a 660a.In wherein message 610 of the present invention is to change among the embodiment of hand request (Handoffrequest) message, and message 660 is to change hand response (HandoffResponse) message.
To describe network layer now sets up.End node 510 makes up IP registration message 670 that size reduced and sends it to target access node 530 at a 670a in its memory, set up and be redirected via the grouping of described node 530 with the request and the network layer of described node 530.In some exemplary embodiment of the present invention, the IP registration message 670 that described size has been reduced is to realize according to the type of message 800 of Fig. 6 according to the present invention.Target access node 530 a 670c receive message 670 and with described message 670 at least some value in each field of comprising be stored in its memory.Target access node 530 makes up mobile IP login information 680 and sends it to home agent 550 at a 680c.According to the present invention, the identification field of mobile IP login request message 680 comprises at least a portion of message identifier field 850 of the message 800 of Fig. 6.
Now initial registration embodiment will be described.670 li of the IP registration messages that the size that promptly realizes according to the message among Fig. 6 800 in one exemplary embodiment of the present invention has been reduced, " I " field 840 indication initial registration.In this embodiment of the present invention, target access node 530 makes up mobile IP login information 680 and sends it to home agent 550 at a 680c.For the structure of mobile IP login request message 680,530 of target access nodes and end node 510 associated state coexist, and to be received from the state of server 540 combined for a 640c.At wherein server 540 of the present invention is among the embodiment of aaa server, be stored in and comprise home address and the home agent address value that is associated with end node 510 with end node 510 associated state in the node 530, described home address and home agent address value be allowed to null.In one embodiment of the invention, be included in home agent address in the state of described storage be not equal to zero and target access node 530 use the part of described value as the corresponding field of mobile IP login request message 680.In another embodiment of the present invention, be included in that equal zero in home agent address in the state of described storage and target access node 530 uses the part of the home agent address value of local configuration as the corresponding field of mobile IP login request message 680.In another embodiment of the present invention, be included in home address in the state of described storage be not equal to zero and target access node 530 use the part of described value as the corresponding field of mobile IP login request message 680.In an embodiment more of the present invention, be included in that home address in the state of described storage equals zero and target access node 530 uses the part of these null values as the corresponding field of mobile IP login request message 680.
Follow-up registration embodiment will be described now.670 li of the IP registration messages that the size that promptly realizes according to the message among Fig. 6 800 in one exemplary embodiment of the present invention has been reduced, the non-initial registration of " I " field 840 indications.According to the one embodiment of the present of invention as discussing among Fig. 6, in non-initial registration message 800, last access node identifier extension 880 is received in the described message 800.According to the present invention, described last access node identifier is configured to identify the identifier of access node 520.
In this embodiment of the present invention, target access node 530 makes up mobile IP login information 680 and sends it to home agent 550 at a 680c.For the structure of mobile IP login request message 680,530 of target access nodes and end node 510 associated state coexist, and to be received from the state of server 540 combined for a 640c.In an embodiment of this expansion, server 540 is core context transfer servers, is stored in to comprise home address and the home agent address value that is associated with end node 510 with end node 510 associated state in the node 530.In one embodiment of the invention, target access node 530 uses a described home address and the part of home agent address value as the corresponding field of mobile IP login request message 680.
In one exemplary embodiment of the present invention, end node 510 is communicated by letter with target access node 530 as illustrated in fig. 8, and end node 510 is not connected with other physics, link or the network layer that identical or different access node is set up simultaneously.In another exemplary embodiment of the present invention, end node 510 is communicated by letter with target access node 530 as illustrated in fig. 8, and simultaneously end node 510 at least one or a plurality of physics, link or the network layer that have and identical or different access node---for example access node 520---foundation is connected.
In each embodiment, one or more modules that node described herein is to use to be carried out and the corresponding step of one or more methods of the present invention---for example signal processing, message generate and/or transfer step---realize.Therefore, in certain embodiments, each feature of the present invention is to use module to realize.This generic module can use the combination of software, hardware or software and hardware to realize.The machine-executable instruction such as software etc. that many machine readable medias that are included in such as memory devices etc. that use is arranged in---for example RAM, floppy disk etc.---in method described above or the method step realizes to realize as the machine of the all-purpose computer that possesses or do not possess additional firmware etc. with control example all or a few part of above-described method in one or more nodes for example.Correspondingly, the present invention also especially is used to make the machine of processor and associated hardware etc. for example to carry out the machine readable media of machine-executable instruction of one or more steps of above-described method at comprising.
In view of above description the of the present invention, numerous other variants of above-described method and apparatus of the present invention will be conspicuous to those skilled in the art.This class variant should be considered to fall within the scope of the present invention.Method and apparatus of the present invention can and in each embodiment really and CDMA, OFDM (OFDM) or be used in access node and mobile node between the communication technology coupling of various other types of wireless communication link is provided.In certain embodiments, access node is implemented as the base station of using OFDM and/or CDMA and mobile node to set up communication link.In each embodiment, mobile node is implemented as notebook, personal digital assistant (PDA) or comprises receiver/transmitter circuitry and other portable set that is used to realize method of the present invention of logic and/or routine.
Claims (20)
1. method of operating the base station, described method comprises:
Receive the mobile IP login information that size has been reduced; And
The mobile IP login information of having reduced from described size generates at least one mobile IPv 4 or the mobile IP v 6 registration message.
2. the method for claim 1 is characterized in that, describedly receives mobile IP login information that size reduced and comprises by airlink and receive described registration message.
3. method as claimed in claim 2 is characterized in that, the mobile IP login information that described size has been reduced comprises the base station identifier that identifies described base station.
4. method as claimed in claim 2 is characterized in that, described method also comprises:
Described receive the mobile IP login information that size reduced before, storage and the corresponding state information of described wireless terminal, described state information comprises at least one in home address, home agent address and the wireless terminal profile information.
5. method as claimed in claim 4 is characterized in that, also be included in before the described storing step, from different with described wireless terminal another nodes receive home address, home agent address and wireless terminal profile information described at least one.
6. method as claimed in claim 4, it is characterized in that at least one in described generation mobile IPv 4 and the mobile IP v 6 registration message comprises generating includes the registration message that is not included in the home agent address value in the mobile IP login information that described size reduced originally in.
7. method as claimed in claim 6, it is characterized in that, in described generation mobile IPv 4 and the mobile IP v 6 registration message at least one also comprises includes the home agent address value in, and described home address value is the home agent address value that before is received from described another node of storage.
8. method as claimed in claim 7 is characterized in that, when described storage do not comprise non-zero home address value with described wireless terminal information corresponding the time, described home address value is zero.
9. method as claimed in claim 6 is characterized in that, at least one in described generation mobile IPv 4 and the mobile IP v 6 registration message also comprises to be brought the Care-of Address of the described base station of sign in the mobile IPv 4 and mobile IP v 6 registration message of described generation into.
10. method as claimed in claim 10 is characterized in that, the mobile IP login information that described size has been reduced comprises message identifier, and described message identifier comprises at least one in sequence number and the timestamp.
12. method as claimed in claim 11 is characterized in that, described message identifier comprises described sequence number and timestamp.
13. method as claimed in claim 5 is characterized in that, another different node of described and described wireless terminal node is the authorization services device.
14. method as claimed in claim 5 is characterized in that, another different node of described and described wireless terminal node is previous another base station that connects of described wireless terminal.
15. a base station comprises:
Receiver module is used to receive the mobile IP login information that size has been reduced;
The signal generation module is used for generating at least one of mobile IPv 4 or mobile IP v 6 registration message from the mobile IP login information that described size has been reduced.
16. base station as claimed in claim 15 is characterized in that, described receiver module is the radio receiver module that is used for receiving by airlink described registration message.
17. base station as claimed in claim 16 is characterized in that, also comprises:
Memory is used to store the mobile IP login information that the size that receives has been reduced, and described memory comprises the mobile IP login information that the size of the base station identifier of including the described base station of sign in of storage has been reduced.
18. base station as claimed in claim 16 is characterized in that, described memory also comprises:
With the corresponding state information of described wireless terminal, described state information comprises at least one in home address, home agent address and the wireless terminal profile information.
19. base station as claimed in claim 18 is characterized in that, also comprises:
Network interface, be used for from different with described wireless terminal another nodes receive home address, home agent address and wireless terminal profile information described at least one.
20. base station as claimed in claim 18, it is characterized in that described signal generation module comprises that the state information that is used for visiting described storage was not included in the mobile IP login information that described size reduced but will be received in the device of the home agent address value in mobile IPv 4 that the mobile IP login information of will reduce from size generates or the mobile IP v 6 registration message at least one to retrieve from the state information of being stored originally.
21. base station as claimed in claim 20, it is characterized in that described signal generation module also comprises and is used for obtaining before to be received from the home agent address value of described another node so that it is incorporated in the described device at least one of the mobile IPv 4 that will generate or mobile IP v 6 registration message from canned data.
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| US72558905P | 2005-10-11 | 2005-10-11 | |
| US60/725,589 | 2005-10-11 | ||
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