CN101310542A - Method and apparatus for effecting a handoff in a mobile internet protocol communication system - Google Patents
Method and apparatus for effecting a handoff in a mobile internet protocol communication system Download PDFInfo
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Abstract
A communication system (100) provides for an expedited Mobile Internet Protocol handoff by allowing a mobile station (102) that is engaged in a communication session with a first access network (110) to obtain Internet Protocol (IP) connectivity information associated with a second access network (120) via the first access network. A tunnel is then established between the mobile station and the second access network via the first access network based on the IP connectivity information and the mobile station obtains IP configuration parameters from the second access network via the established tunnel. By obtaining the IP configuration parameters associated with the second access network via the first access network instead of waiting until an air interface connection has been established with the second access network, the mobile station may be more expeditiously handed off to the second access network in the event that such a handoff determination is made.
Description
MULTIPLE-BLADE
It is the provisional application No.60/757 of " METHOD ANDAPPARATUS FOR EFFECTING A HANDOFF IN A MOBILEINTERNET PROTOCOL COMMUNICATION SYSTEM " that the application requires in the title that on January 9th, 2006 submitted to, 272 priority, this application is that the applicant of this patent enjoys jointly, at this in conjunction with its full content for your guidance.
Technical field
The present invention relates generally to mobile Internet Protocol (mobile IP) communication system, more particularly, the present invention relates to realize packet data communication session is connected the method and apparatus that switches to another IP connection from an IP.
Background technology
When travelling carriage (MS) participated in mobile IP communication session, MS was allocated for the fixed ip address of session.The mobile agent of local network is served as the anchor point that communicates with MS during communication session, this mobile agent is called as local agent.When MS when its local network moves to external network, the packet that local agent utilizes tunneling technique will be sent to travelling carriage is sent to the Care-of Address related with travelling carriage (CoA).Usually, CoA is associated with the mobile agent of external network, and the mobile agent of this external network is the external agent just.Then, the packet of being sent to MS can utilize tunneling technique to be sent to the external agent, and sends MS to subsequently.
External network is announced their existence to MS by beacon signal.These beacon signals comprise the identifier related with external network, such as network identifier or Operator ID.As MS during by the variation in network externally of the beacon signal detection that receives, MS just sends to local agent by new mobile agent with mobile IP login request.In other words, MS must come to connect with new network by the air interface of new network, obtains CoA from new network, then by with being connected of new network foundation this CoA being sent to local agent.Usually, this CoA is the external agent's that is associated with external network CoA, this process need external agent's support.In fact, before obtaining high layer information,, is connected, just constructs and the switching of network newly from bottom upstream sequence ground by setting up with the low layer of new network such as before obtaining the IP link information of CoA for example.Yet, sequentially connecting and can spend the considerable time, probably between 100 milliseconds to 2 seconds, to such an extent as to this can not support application of many time-sensitives usually too slowly, such as ip voice (VoIP), it needs to switch faster number.
Therefore, just exist the needs of the method and apparatus that quickens mobile IP switching are provided.
Description of drawings
Fig. 1 is the block diagram according to the wireless communication system of the embodiment of the invention.
Fig. 2 is the block diagram according to travelling carriage among Fig. 1 of the embodiment of the invention.
Fig. 3 is the block diagram according to Access Network among Fig. 1 of the embodiment of the invention.
Fig. 4 is the block diagram according to media independent handoff server among Fig. 1 of the embodiment of the invention.
Fig. 5 is the signal flow graph according to the method for being carried out by the communication system of Fig. 1 in switching of the embodiment of the invention.
Fig. 6 is the signal flow graph of the method for being carried out by the communication system of Fig. 1 in switching according to other embodiments of the present invention.
Those of ordinary skill in the art will recognize that the element in the accompanying drawing is to be described for simple and clear purpose, and they are also unnecessaryly proportionally described.For example, some size of component in the accompanying drawing can be with respect to other element by exaggerative, and this helps to promote the understanding to various embodiments of the invention.And, for fear of these various embodiment of the present invention are produced excessive interference, do not describe general and well-known element usually, these elements are useful or essential in the embodiment of viable commercial.
Embodiment
In order to solve to the needs of the method and apparatus that quickens mobile Internet Protocol (IP) switching are provided, a kind of communication system is provided, the travelling carriage that this communication system allows to participate in communicating session with first Access Network provides the mobile IP of acceleration to switch by the Internet Protocol link information that the acquisition of first Access Network is associated with second Access Network.Then, based on this Internet Protocol link information, be based upon tunnel between the travelling carriage and second Access Network by first Access Network, this travelling carriage obtains the Internet Protocol configuration parameter by the tunnel of this foundation from second Access Network.By the Internet Protocol configuration parameter that obtains through first Access Network to be associated with second Access Network, rather than wait is connected with the air interface of second Access Network up to setting up, under the situation of determining this switching of execution, travelling carriage just can be switched to second Access Network more quickly.
Usually, embodiments of the invention comprise a kind of method that mobile IP switches that is used to quicken, this method comprises the communication session that participates in first Access Network, obtain the Internet Protocol link information be associated with second Access Network by first Access Network, based on this Internet Protocol link information, set up tunnel with second Access Network by first Access Network, and obtain the Internet Protocol configuration parameter from second Access Network by the tunnel of this foundation.
Another embodiment of the present invention comprises a kind of method that mobile IP switches that is used to quicken, this method comprises by the communication session of first Access Network participation with travelling carriage, receive from the request of travelling carriage by first Access Network the Internet Protocol link information, this Internet Protocol link information is relevant with second Access Network, obtain the Internet Protocol link information asked, and send the Internet Protocol link information that obtains to travelling carriage by first Access Network.
Another embodiment of the present invention comprises a kind of travelling carriage, this travelling carriage comprises processor, this processor is configured to participate in the communication session with first Access Network, obtain the Internet Protocol link information be associated with second Access Network by first Access Network, based on this Internet Protocol link information, set up tunnel with second Access Network by first Access Network, and obtain the Internet Protocol configuration parameter from second Access Network by the tunnel of this foundation.
Still another embodiment of the present invention comprises a kind of Access Network, this Access Network comprises processor, this processor is configured to participate in the communication session with travelling carriage, reception is from the request of travelling carriage to the Internet Protocol link information, this Internet Protocol link information is associated with another Access Network, obtain the Internet Protocol link information asked, and send the Internet Protocol link information that obtains to travelling carriage.
The present invention can more fully be narrated with reference to Fig. 1-6.Fig. 1 is the block diagram according to the wireless communication system 100 of the embodiment of the invention.Communication system 100 is the wireless communication systems according to mobile IP (Internet Protocol) standard operation, and this moves the IP standard is the standard of being developed by the internet engineering task group, such as mobile IPv 4 or mobile IP v 6 standard.For example, communication system 100 can comprise that this 802.xx standard for example is 802.11,802.15,802.16,802.20 or 802.21 standards according to the wireless lan (wlan) communication system of one or more standard operations in IEEE (IEEE) the 802.xx standard.Yet, those of ordinary skill in the art will recognize, communication system 100 can comprise any or multiple cellular communication system of realizing mobile IP standard, these cellular communication systems for example, but be not limited to general packet radio service (GPRS) communication system, Universal Mobile Telecommunications System (UMTS) communication system, code division multiple access (CDMA) 2000 communication systems or such as the 4th generation (4G) communication system of OFDM (OFDM) communication system.
Each Access Network 110,120 is coupled to corresponding authentication, mandate, charging/DHCP (AAA/DHCP) server 112,122.Yet in other embodiments of the invention, the function of each AAA unit can reside in the network entity of entity separation of function of the unit of corresponding DHCP with trustship.Each Access Network 110,120 also is coupled to IP network 130, and can be coupled to based on web server 132 by this IP network, the database of IP link information is preserved in this server 132 trustships, and this IP link information is AAA and the DHCP configuration information for being associated with each Access Network in a plurality of Access Networks 110,120 for example.Preferably, server 132 comprises media independent handovers (MIH) server; Yet, those of ordinary skill in the art will recognize, server 132 can comprise can be by any server based on web of an Access Network contact, and this Access Network is such as an Access Network in Access Network 110 and 120, so that obtain the IP link information of other Access Network.In various embodiment of the present invention, IP network 130 can comprise IP kernel heart net, public IP network (such as the internet) or the two, and the one or more Access Networks in a plurality of Access Networks 110,120 can be coupled to IP network 130 by packet data serving node (PDSN) (not shown).Each air interface 104 and 106 comprises forward link and reverse link.Each forward link comprises a plurality of forward signaling channels and a plurality of forward traffic channel, and each reverse link comprises a plurality of reverse signalling channels and a plurality of reverse traffic channel.When the forward direction link comprised the honeycomb forward link, this forward link can also comprise pilot channel, and when the forward direction link comprised the WLAN forward link, this forward link can also comprise beacon channel.
Fig. 3 is the block diagram according to the Access Network 300 of the embodiment of the invention, and this Access Network 300 for example is Access Network 110 and 120.Access Network 300 comprises processor 302, and this processor for example is one or more microprocessors, microcontroller, digital signal processor (DSP), their combination or the known this miscellaneous equipment of those of ordinary skill in the art.Access Network 300 also comprises at least one memory device 304 that is associated with processor, this memory device for example is random access storage device (RAM), dynamic RAM (DRAM) and/or read-only memory (ROM) or their equivalent device, memory device 304 has been preserved data and the program that allows the necessary all functions of operation in the Access Network executive communication system 100, and these data and program can be carried out by corresponding processor.At least one memory device 304 of Access Network 300 has also been preserved each aaa functionality relevant with the AAA/DHCP server and the routing address of DHCP function, IP address for example, and the routing address of server 132, IP address for example, this AAA/DHCP server is associated with Access Network, such as AAA/DHCP server 112 and 122.Access Network 300 also comprises the transceiver 306 that communicates with processor 302, and this transceiver receives by the air interface that is associated and sends signal, and this air interface for example is air interface 104 and 106.
Fig. 4 is the block diagram according to the server 132 of the embodiment of the invention.Server 132 comprises processor 402, and this processor for example is one or more microprocessors, microcontroller, digital signal processor (DSP), their combination or the known this miscellaneous equipment of those of ordinary skill in the art.Server 132 also comprises at least one memory device 404 that is associated with corresponding processor, this memory device for example is random access storage device (RAM), dynamic RAM (DRAM) and/or read-only memory (ROM) or their equivalent device, memory device 404 has been preserved data and the program that allows the necessary all functions of operation in Access Network and the server executive communication system 100, and these data and program can be carried out by corresponding processor.At least one memory device 404 of server 132 also comprises database 406, this database has been preserved and the relevant IP link information of each Access Network 110,120 in the communication system 100, such as the IP address of IP address, name server (DNS) address, the gateway that is associated with Access Network or router and each aaa functionality that is associated with Access Network and DHCP function.The database 406 of server 132 can also be preserved low layer information and the high layer information that is associated with each Access Network 110,120, and this low layer information for example is bandwidth capacity, and this high layer information is the service for supporting for example.In one embodiment of the invention, server 132 can be safeguarded by the operator of communication system 100.In other embodiments of the invention, server 132 can safeguard that the operator of each Access Network 110,120 that comprises can get in touch with this third party by the third party in communication system 100, so that the service of visit and acquisition server 132.
Embodiments of the invention preferably MS 102, Access Network 110 and 120 and each equipment of server 132 in realize, more particularly, can use software program and instruction or realize embodiments of the invention in the mode of software program and instruction, these programs and instruction are stored at least one memory device 204,304,404 of MS, Access Network and server, and they can move by the processor in MS, Access Network and the server 202,302,402.Yet, those of ordinary skill in the art will recognize, embodiments of the invention can alternatively be realized with example, in hardware, for example, use integrated circuit (IC), application-specific integrated circuit (ASIC) (ASIC) or the like to realize, such as use MS 102, Access Network 110 and 120 and one or more equipment of server 132 in the ASIC that realizes, here for " be used for ... device " all with reference to relating to any this enforcement of the present invention.Based on content disclosed herein, under the situation of too much not testing, those of ordinary skill in the art will be easy to make and to realize this software and/or hardware.
In communication system 100, when MS 102 participated in mobile IP communication session, MS was assigned with the local address that carries out session, just fixed ip address.The mobile agent of local network is served as the anchor point that communicates with MS 102 during communication session.When MS roams in the middle of different networks, for example, when in the middle of Access Network 110 and 120, roaming, mobile IP allows MS 102 to keep identical IP address, and the packet that will be sent to MS is routed to the Care-of Address (CoA) that is associated with this MS, so just guarantee the professional current location that flows to MS all the time, and MS can continue its communication session when roaming, and session does not go offline.And owing to be the locomotive function of carrying out mobile IP in network layer rather than physical layer, therefore, MS 102 can roam in the middle of the network of implementing different air interface technologies, keeps the connection of the application of well afoot simultaneously.
In the prior art, as MS during from the netsurfing of current service to new objective network, be connected with the physical layer of objective network by setting up, verify, also connect the Care-of Address (CoA) that obtains in the objective network, just can realize switching objective network by the physical layer of setting up to objective network.Then, MS is sent to local agent by objective network with this CoA.This process need spends the considerable time, and usually too slow so that can not support the application of many time-sensitives, and such as internet protocol voice (VoIP), its needs to switch faster.In order to reduce the stand-by period of switching, before determining to switch to objective network and foundation and the low layer of objective network be connected, high level (more than 3 layers and the 3 layers) configuration parameter that communication system 100 just provides acquisition to be associated with objective network for MS, and negotiation is connected with the high level of objective network.Before the switching that starts low layer connects,, just can quicken to carry out mobile IP and switch, and minimizing is switched the relevant stand-by period with mobile IP by obtaining high-rise configuration parameter and high-rise through consultation the connection.
With reference now to Fig. 5,, the signal flow graph 500 according to the embodiment of the invention is provided, this flow chart description the mobile IP that carries out by communication system 100 switch.Move the IP communication session when MS 102 is just participating in 502 at present, and reside in such as in the overlay area of first Access Network of Access Network 110 time, with regard to commencing signal flow chart 500.First Access Network 110 can comprise the local network of MS, perhaps can comprise the external network that this MS roams into when MS participates in communication session.When in the overlay area that resides in first Access Network 110, MS 102 detects the existence of 504 contiguous Access Networks, and this contiguous Access Network for example is an Access Network 120.In one embodiment of the invention, MS 102 can detect the channel that is associated with the second contiguous Access Network, and such as beacon channel or pilot channel, this contiguous Access Network for example is an Access Network 120.Usually, beacon channel or pilot channel will comprise network identifier or Operator ID, and this identifier has identified the network with the signal correction connection.MS 102 can also determine the quality metric value that is associated with detected channel, such as signal strength signal intensity, signal to noise ratio (snr), Carrier interference ratio (C/I), pilot power and gross power (Ec/Io) than, the error rate (BER) or frame error rate (FER).MS 102 also monitors the similar channel that is associated with the Access Network 110 of current service, such as beacon channel or pilot channel, and further definite quality metric value about these monitoring channels.In other embodiments of the invention, MS 102 can detect the existence of contiguous Access Network, and this contiguous Access Network is Access Network 120 just, as long as MS thinks be sure of to have contiguous Access Network, and MS knows the identifier that is associated with contiguous Access Network.For example, MS 102 can import or based on from the Access Network of current service or the pre-configured neighbor list that receives from any source of MS outside based on the user, detect contiguous Access Network 120, this user's input is such as the user command that is connected to contiguous Access Network, wherein the identifier of contiguous Access Network is stored at least one memory device 204 of MS, and the identifier of this contiguous Access Network for example is network or Operator ID.
Response detects the existence of second Access Network 120, and MS 102 is by the reverse link of air interface 104, and the request of the IP link information that will be associated with second Access Network 120 transmits 506 to first Access Networks 110, and this IP link information is layer 3 information just.For example, in various embodiment of the present invention, MS 102 can respond and detect the channel that is associated with second Access Network 120 and transmit request, response determines that the detection quality of channel that is associated with second Access Network 120 is better than corresponding quality threshold and transmits request, for example, when signal strength signal intensity or SNR have surpassed corresponding signal strength signal intensity or SNR thresholding, transmit request, and/or response determines that the channel quality that is associated with first Access Network 110 is better than corresponding quality threshold and transmits request.Preferably, these thresholdings are different from the employed any handoff threshold of MS on rank, thereby before MS determines to be fit to switch, allow MS to transmit request.In other words, no matter be because the detection signal quality of the Access Network that detects or because the detection signal quality of the Access Network 110 of current service or because the two, as long as MS is by the algorithm with reference to preservation at least one memory device 204 of MS, determine that the Access Network 120 that is detected is potential switching targets, MS 102 just can transmit request so.Those of ordinary skill in the art will recognize, can use many available algorithms to determine whether the request of transmitting, and this does not break away from the spirit and scope of the present invention.
Just as known in the art, the layer representation of agreement is commonly called protocol stack.Protocol stack generally includes at least 5 layers, and these layers are according to being application layer, transport layer, network layer, link layer and physical layer from being up to minimum order.Bottom is physical layer just, and it comprises the network hardware and the physical medium that is used for transfer of data.The last layer of adjacency is link layer or layer 2, and its is carried out and to guarantee that data carry out the agreement of reliable transmission in communication system, so that guarantee the transmission of data.Layer 3 or network layer are responsible for transmitting data on a series of different physical networks in interconnect data source and data destination.In network layer, comprise Routing Protocol, for example the IP agreement of IPv4 or IPv6 etc.The IP packet that exchanges between the network layer of equity comprises the IP header, and this IP header has comprised the information of IP agreement and the data of upper-layer protocol.The IP header comprises protocol identification field, and further comprises the transport address, IP address normally, and this transport address correspondence is sent each transport layer of packet and the transport layer destination of packet.The transport address has identified interface uniquely, and this interface can send and receive the packet of arrival transport layer by network layer, and this interface has carried out concrete narration in IETF RFC (Request for Comment) 1246.In IETF RFC791, specifically define the IP agreement.
Response is from the request of the IP link information that is associated with second Access Network 120 of MS 102 receptions, and first Access Network 110 will transmit 508 to server 132 to the request of IP link information.Response receives the request from first Access Network 110, and server 132 is retrieved the IP link information that is associated with second Access Network 120 of being asked from database 406, and will comprise message transmission 510 to first Access Networks 110 of the IP link information of retrieval.The IP link information of this retrieval and transmission comprises layer 3 information, and this layer 3 information are to verify and carry out high level (layer 3 and layer are more than 3) the negotiation information necessary that is connected with second Access Network for MS 102 to second Access Network 120.For example, the IP link information that is associated with second Access Network 120 of this retrieval and transmission can comprise routing address, IP address just, and this routing address is associated with each aaa functionality and the DHCP function of AAA/DHCP server 122.The information of this retrieval and transmission may further include low layer information and the high layer information that is associated with second Access Network 120, and this low layer information for example is bandwidth capacity, and this high layer information is the service for supporting for example.
Preferably, the message that is sent to first Access Network 110 by server 132 comprises the revision of IEEE802.21MIH information server (IS) message, and this message is modified to and comprises dhcp address data field and AAA address data field.The dhcp address data field comprises the DHCP IP address of the DHCP function that is associated with second Access Network 120, the IP address that is associated with the DHCP function of AAA/DHCP server 122 just, MS 102 can get in touch this IP address to obtain the CoA relevant with second Access Network 120.Under the situation of IPv6, this address can comprise as the local multicast address of the All_DHCP_Relay_Agents_and_Servers link that defines in DHCPv6.The AAA address data field comprises the IP address that is associated with the aaa functionality of AAA/DHCP server 122, and MS can get in touch these addresses, oneself verifies to second Access Network 120 so that make.
Response receives the message from server 132, and first Access Network 110 transmits 512 to MS 102 by the forward link of air interface 104 with the information that receives.By the IP link information that use obtains from server 132, MS 102 just passes through air interface 104 and first Access Network 110 is set up and the tunnel of second Access Network 120.Then, MS 102 carries out the layer negotiations of 514,516 and second Access Network 120 by the tunnel of setting up, consult and/or the AAA negotiation such as PPP(Point-to-Point Protocol), whereby, MS 102 makes and oneself verifies to the aaa functionality of AAA/DHCP server 122, and obtain IP configuration parameter and AAA parameter from second Access Network, obtain the CoA address such as DHCP function from AAA/DHCP server 122, when MS is that this CoA address can be used to use tunneling technique to send packet to MS 102 when providing service by second Access Network 120.Then, MS 102 stores 518 at least one memory device 204 of MS with the IP configuration parameter and the AAA parameter that receive.Like this, MS 102 just obtains the IP link information, and participates in layer negotiations, and does not need to set up being connected of physical layer and link layer by air interface 106.
Consult with the PPP(Point-to-Point Protocol) of second Access Network 120 and/or after AAA consults carrying out, MS 102 determines that 520 switch to second Access Network with communication session from first Access Network 110.Then, MS 102 is by the air interface 106 relevant with second Access Network and according to well-known handoff technique, participate in the handover negotiation optimization of 522 and second Access Network 120, so that set up and the physical layer of Access Network and being connected of link layer, such as obtaining channel allocation and consulting service quality.Yet, because MS 102 verifies to AAA/DHCP server 122, and obtained high-rise IP configuration parameter from second Access Network 120, when obtaining the CoA address relevant with second Access Network, being connected just can be connected of physical layer and link layer bind 524, and do not need to get in touch now AAA/DHCP server 122 with high level.Then, realize the switching of 526MS 102 from first Access Network, 110 to second Access Networks 120 according to well-known technology, this MS can receive and send packet from the CoA that AAA/DHCP server 122 obtains by second Access Network with by MS.
In other embodiments of the invention, MS 102 can based on the reciprocity query/response signaling of second Access Network 120, rather than, obtain IP and connect parameter based on the inquiry of server 132.Fig. 6 has described the signal flow graph 600 that mobile IP according to other embodiments of the present invention switches, and this moves the IP switching is to be carried out by communication system 100.Be similar to signal flow graph 500, just participating in 602 and move the IP communication session in that MS 102 is current, and reside in such as in the overlay area of first Access Network of Access Network 110 time, with regard to commencing signal flow chart 600.Once more, first Access Network 110 can comprise the local network of MS, perhaps can comprise the external network that MS has roamed into when participating in communication session.When in the overlay area that resides in first Access Network 110, MS 102 detects the existence of 604 contiguous Access Networks, such as Access Network 120.Be similar to signal flow graph 500, in one embodiment of the invention, MS 102 can detect the channel that is associated with contiguous Access Network, such as detecting beacon channel or the pilot channel that is associated with Access Network 120.MS 102 can also determine and detect the quality metric value that channel is associated.MS 102 also monitors the similar channel that is associated with the Access Network 110 of current service, such as beacon channel or pilot channel, and further definite quality metric value about these monitoring channels.In other embodiments of the invention, MS 102 can detect the existence of contiguous Access Network, and the existence of Access Network 120 just as long as MS thinks is be sure of to have contiguous Access Network, and MS knows and the relevant identifier of contiguous Access Network.
Response detects the existence of second Access Network 120, and the request to the IP link information that MS 102 will be associated with second Access Network 120 transmits 606 to first Access Networks 110, and this IP link information is 3 layers of information just.For example, in various embodiment of the present invention, MS 102 can respond and detect the channel that is associated with second Access Network 120 and transmit request, perhaps MS 102 can respond MS and determines that the channel quality be associated with second Access Network 120 is better than corresponding quality threshold and transmits request, for example when signal strength signal intensity or SNR have surpassed corresponding signal strength signal intensity or SNR thresholding, just transmit request, and/or response MS determines that the channel quality that is associated with first Access Network 110 transmits request when being better than corresponding quality threshold.Be similar to signal flow graph 500, preferably, these thresholdings are different from the employed any handoff threshold of MS on rank, thereby before MS determines to be fit to switch, allow MS to transmit request.In other words, be similar to signal flow graph 500, no matter be because the detection signal quality of the Access Network that detects or because the detection signal quality of the Access Network 110 of current service or because the two, as long as MS is by the algorithm with reference to preservation at least one memory device 204 of MS, determine that the Access Network 120 that is detected is potential switching targets, MS 102 just can transmit request.
Preferably, the request that is sent to first Access Network 110 by MS 102 is the revision of CARD (candidate access router discovery agreement) request or any similar agreement request, this request is modified to and comprises expansion (a plurality of), and this expansion comprises the request to the IP link information that is associated with second Access Network.The request that response receives from MS 102, by reusing modified as mentioned above CARD request, first Access Network 110 transmits 608 to second Access Networks 120 with the request of IP link information.The request that response receives from first Access Network 110, second Access Network 120 is retrieved institute's information requested, and will comprise message transmission 610 to first Access Networks 110 of this solicited message.
Preferably, the message that is sent to first Access Network 110 by second Access Network 120 is the revision of CARD answer or any similar protocol message, this message is modified to and comprises expansion (a plurality of), this expansion comprises information requested, this information requested comprises dhcp address data field and AAA address data field such as being modified to, and they provide the DHCP function that is associated with second Access Network 120 and the IP address of aaa functionality respectively.For example, the information that is provided by second Access Network 120 can comprise layer 3 information, this layer 3 information are for making MS 102 verify and be the high level that MS 102 carried out is connected with second Access Network (layer 3 and layer more than 3) negotiation information necessary that to second Access Network 120 this layer 3 information are the IP addresses that is associated such as with each aaa functionality and the DHCP function of AAA/DHCP server 122.The information that is provided can also comprise low layer information and the high layer information that is associated with second Access Network 120, and this low layer information for example is bandwidth capacity, and this high layer information is the service for supporting for example.
The message that response receives from second Access Network 120, first Access Network 110 transmits 612 to MS 102 by the forward link of air interface 104 with reception information.By using the IP link information that obtains from second Access Network 120, MS 102 sets up tunnel with second Access Network 120 by the air interface 104 and first Access Network 110.Then, MS 102 carries out the layer negotiations of 614,616 and second Access Network 120 by the tunnel of setting up, consult and/or the AAA negotiation such as PPP(Point-to-Point Protocol), whereby, MS 102 makes and oneself verifies to the aaa functionality of AAA/DHCP server I 22, and obtain IP configuration parameter and AAA parameter from second Access Network, obtain the CoA address such as DHCP function from AAA/DHCP server 122, when MS when providing service by second Access Network 120, can use this CoA address to utilize tunneling technique that packet is sent to MS 102.Then, MS 102 stores 618 at least one memory device 204 of MS with the IP configuration parameter and the AAA parameter that receive.Like this, MS 102 has just obtained the IP link information, and participates in layer negotiations, and does not need to set up being connected of physical layer and link layer by air interface 106.
Consult with the PPP(Point-to-Point Protocol) of second Access Network 120 and/or after AAA consults carrying out, MS 102 determines that 620 switch to second Access Network 120 with communication session from first Access Network 110.Then, MS 102 is by the air interface 106 that is associated with second Access Network and according to well-known handoff technique, participate in the handover negotiation optimization of 622 and second Access Network 120, be connected with link layer with the physical layer of second Access Network, such as obtaining channel allocation and consulting service quality so that set up.Yet, because MS 102 verifies to AAA/DHCP server 122, and obtain high-rise IP link information from second Access Network 120, such as obtaining the CoA address relevant with second Access Network, being connected just can be connected of physical layer and link layer bind 624, and do not need to get in touch now AAA/DHCP server 122 with high level.Then, realize the switching of 626MS 102 according to well-known technology, and this MS can receive and send packet from the CoA that AAA/DHCP server 122 obtains by second Access Network 120 with by MS from first Access Network, 110 to second Access Networks 120.
When the communication session that participates in first Access Network, this first Access Network is Access Network 110 just, by allowing MS 102 to obtain the IP link information relevant with second Access Network through first Access Network, this second Access Network is Access Network 120 just, under the situation of determining this switching of execution, MS just can be switched to second Access Network more quickly.MS 102 can be from the IP link information that obtains based on the server of web be associated with second Access Network 120, perhaps can based on the reciprocity query/response signaling of second Access Network, obtain the IP link information.Then, based on this IP link information, be based upon tunnel between the MS 102 and second Access Network 120 by first Access Network 110, MS obtains the IP configuration parameter by the tunnel of setting up from second Access Network.By the IP configuration parameter that obtains through first Access Network 110 to be associated with second Access Network 120, rather than wait is connected with the air interface of second Access Network 120 up to setting up, determining that MS 102 just can be switched to second Access Network more quickly under the situation that execution is switched.
Although the present invention has carried out specific demonstration and description with reference to certain embodiments, but those of ordinary skill in the art will understand, in not breaking away from, under the situation of disclosed invention scope, can carry out various modifications and carry out equivalent element replacement the present invention as back claims.Therefore, specification and accompanying drawing should be considered to illustrative effect, but not restrictive, sense, all such modifications and replacement should be contemplated as falling with in the scope of the present invention.
Narrated the solution of benefit, other advantage and problem in the above about certain embodiments.Yet, the solution of these benefits, advantage, problem and may make any benefit, advantage or solution produces or make any key element that they become more outstanding should not be considered to any one or the key of all authority requirement, essential or essential feature or key element.Use as this paper, term " comprises " or their any distortion means it is to have covered comprising of non-exclusionism, not merely comprise those key elements so that comprise process, method, article or the equipment of a series of key elements, and can comprise clearly do not list or be other intrinsic key element of this process, method, article or equipment.Also will recognize if used any relevant term, such as first and second, top and bottom or the like, the use of these relational languages just is used for an entity or action are distinguished with other entity or action, and not necessarily requires or this relation of hint any reality between these entities or action or in proper order.
Claims (14)
1. one kind is quickened the method that mobile Internet Protocol switches, and comprising:
Participate in communication session with first Access Network;
Obtain the Internet Protocol link information that is associated with second Access Network by described first Access Network;
Based on described Internet Protocol link information, by the tunnel of described first Access Network foundation with described second Access Network; And
Tunnel by described foundation obtains the Internet Protocol configuration parameter from described second Access Network.
2. described method as claimed in claim 1, wherein said Internet Protocol link information comprise the Internet Protocol address of the authentication that is associated with second Access Network, mandate, billing function and the Internet Protocol address of the DHCP function that is associated with described second Access Network in one or more.
3. described method as claimed in claim 1 wherein obtains the Internet Protocol link information and comprises by described first Access Network, obtains the Internet Protocol link information from media independent handoff server.
4. described method as claimed in claim 1 wherein obtains the Internet Protocol link information and comprises by described first Access Network, obtains the Internet Protocol link information from described second Access Network.
5. described method as claimed in claim 1 further comprises:
After described second Access Network obtains described Internet Protocol configuration parameter, determine to switch to described second Access Network;
Before determining to switch to described second Access Network,, consult to be connected with the point-to-point of described second Access Network based on the Internet Protocol link information of described acquisition;
Response determines to switch to described second Access Network, sets up to be connected with link layer with the physical layer of described second Access Network; And
High level connected to be connected with link layer with the physical layer of described foundation bind.
6. one kind is quickened the method that mobile Internet Protocol switches, and comprising:
By first Access Network, participate in communication session with travelling carriage;
By described first Access Network, receive request from the described travelling carriage pair Internet Protocol link information that is associated with second Access Network;
Obtain the Internet Protocol link information of described request; And
By described first Access Network, the Internet Protocol link information of described acquisition is sent to described travelling carriage.
7. described method as claimed in claim 6, wherein said Internet Protocol link information comprise the Internet Protocol address of the authentication that is associated with described second Access Network, mandate, billing function and the Internet Protocol address of the DHCP function that is associated with described second Access Network in one or more.
8. described method as claimed in claim 6, the Internet Protocol link information that wherein obtains described request comprises:
To be sent to media independent handovers (MIH) server to the request of described Internet Protocol link information; And
Reception is from the message of described MIH server, and this message comprises the Internet Protocol link information.
9. described method as claimed in claim 6, the Internet Protocol link information that wherein obtains described request comprises:
To be sent to described second Access Network to the request of described Internet Protocol link information; And
Reception is from the message of described second Access Network, and this message comprises described Internet Protocol link information.
10. travelling carriage, this travelling carriage comprises processor, this processor is configured to participate in the communication session with first Access Network, obtain the Internet Protocol link information that is associated with second Access Network by described first Access Network, based on this Internet Protocol link information, set up tunnel with described second Access Network by described first Access Network, and the tunnel by described foundation is from described second Access Network acquisition Internet Protocol configuration parameter.
11. as travelling carriage as described in the claim 10, described processor further is configured to after described second Access Network obtains described Internet Protocol configuration parameter, determine to switch to described second Access Network, before determining to switch to described second Access Network, Internet Protocol link information based on described acquisition, consult to be connected with the point-to-point of described second Access Network, response determines to switch to described second Access Network, set up and the physical layer of described second Access Network and being connected of link layer, and high level is connected and binding physical layer and being connected of link layer of setting up.
12. Access Network, this Access Network comprises processor, this processor is configured to participate in the communication session with travelling carriage, reception is from the request of the described travelling carriage pair Internet Protocol link information that is associated with another Access Network, obtain the Internet Protocol link information of described request, and the Internet Protocol link information of described acquisition is sent to described travelling carriage.
13. as Access Network as described in the claim 12, wherein said Internet Protocol link information comprises one or more in the Internet Protocol address of the Internet Protocol address of the authentication that is associated with another Access Network, mandate, billing function and the DHCP function relevant with described another Access Network.
14. as Access Network as described in the claim 12, wherein said processor is configured to: by being sent to media independent handovers (MIH) server to the request of described Internet Protocol link information, and, obtain the Internet Protocol link information of described request by receiving message from comprising of described MIH server of described Internet Protocol link information.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US75727206P | 2006-01-09 | 2006-01-09 | |
| US60/757,272 | 2006-01-09 | ||
| US11/618,947 | 2007-01-02 |
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| CN101310542A true CN101310542A (en) | 2008-11-19 |
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| CNA2007800000917A Pending CN101310542A (en) | 2006-01-09 | 2007-01-04 | Method and apparatus for effecting a handoff in a mobile internet protocol communication system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8594099B2 (en) | 2008-12-04 | 2013-11-26 | Electronics And Telecommunications Research Institute | Tunneling-based mobility support equipment and method |
| WO2018233419A1 (en) * | 2017-06-24 | 2018-12-27 | 华为技术有限公司 | Information processing method and apparatus |
-
2007
- 2007-01-04 CN CNA2007800000917A patent/CN101310542A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8594099B2 (en) | 2008-12-04 | 2013-11-26 | Electronics And Telecommunications Research Institute | Tunneling-based mobility support equipment and method |
| CN102273254B (en) * | 2008-12-04 | 2014-03-12 | 韩国电子通信研究院 | Tunneling-based mobility support equipment and method |
| WO2018233419A1 (en) * | 2017-06-24 | 2018-12-27 | 华为技术有限公司 | Information processing method and apparatus |
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