CN101500219B - Mobility managing method and mobile terminal - Google Patents

Mobility managing method and mobile terminal Download PDF

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Publication number
CN101500219B
CN101500219B CN2009101184548A CN200910118454A CN101500219B CN 101500219 B CN101500219 B CN 101500219B CN 2009101184548 A CN2009101184548 A CN 2009101184548A CN 200910118454 A CN200910118454 A CN 200910118454A CN 101500219 B CN101500219 B CN 101500219B
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China
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home agent
portable terminal
address
mobile
area network
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CN101500219A (en
Inventor
池田新吉
船引诚
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Panasonic Intellectual Property Corp of America
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Matsushita Electric Industrial Co Ltd
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Priority claimed from JP2003161808A external-priority patent/JP4289030B2/en
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Abstract

The invention relates to a mobile managing method and a mobile terminal. In a mobile communication system using a mobile IP, a mobile terminal (10) determines a main home agent (50-1) and a main home address. When the mobile terminal (10) moved to a network (2) different in service form, a home address for use on a movedin domain network is registered as a primary care of address to the main home agent (50-1), thereby enabling communications by using the main home address even upon accessed from the other than the belonging domain network (2). This makes it possible to flexibly cope with an incoming call from the external by the use of a representative home address even on the Internet as a distributed network.

Description

Be used to manage mobile method and portable terminal
The application be submitted on July 25th, 2003, application number is 03804887.6, denomination of invention is divided an application for the application for a patent for invention of " management method of mobile and portable terminal ".
Technical field
The present invention relates to management method of mobile and portable terminal in the mobile communication system that a kind of its purpose is to want access internet, this management method of mobile and portable terminal can be supported the change of caused home address when portable terminal is roamed between the different mobile communications network of service form, therefore can communicate according to an address of disclosed notice.
Background technology
Mobile IP is as a management method of mobile in the internet system.In RFC3220 (IP moves support), make and the corresponding mobile IPv 4 standardization of IPv4 (Internet Protocol Version 4).Simultaneously, in internet draft draft-ietf-mobileip-ipv6 (IPv6 moves support), be among the standardization with the corresponding mobile IP v 6 of IPv6 (IPv6).Even portable terminal is to roam between heterogeneous networks, these agreements also can make by utilizing identical address to communicate.
In mobile IP v 6, from the network information that the access router of current phase connected link sends, obtain the prefix information of current phase connected link away from the portable terminal of home link, therefore produce employed Care-of Address on this link.After this, by binding update messages is sent to home agent, this Care-of Address is registered as initial Care-of Address to deliver to the home agent on the home link that is arranged in portable terminal.After the binding update messages that receives from portable terminal, home agent is created or is upgraded the binding high-speed cache so that home address and Care-of Address link together.
Home agent reference one binding high-speed cache and agency's reception are sent to the packets of information of the home address on the home link that is positioned at portable terminal so that the acted on behalf of packets of information that receives is encapsulated, and therefore execution sends it to the such processing of Care-of Address of portable terminal.Portable terminal carries out decapsulation to the bag that home agent transmitted, and receives the packets of information of the home address that is sent to portable terminal thus.
Simultaneously, traditional, as the method for mobile communication in this field, have some method that is similar to described in the JP-T-2002-503415.Figure 23 has provided the traditional method of mobile communication described in the disclosure thing.
In Figure 23, dispose a plurality of mobile communications networks by Private Automatic Exchange (PABXs) 2303, home base station (HBSs) 2305, advanced digital radio communication (DECTs) 2306 and portable terminal 2304.These mobile communications networks link to each other by mobile subscriber's repeater (M-TVSt) 2301.Ownership database (HDB) 2302 is by being positioned at Private Automatic Exchange (PABX) 2303 on each mobile communications network and obtaining the call number of employed portable terminal 2304 on each network and it being managed, and make it relevant, therefore can the incoming call from the outside be transmitted with generation table number sign indicating number.
Yet in the mobile communication system that adopts traditional mobile IP, portable terminal and home agent are in man-to-man relation, and wherein home agent is mounted/is controlled among each zone of mobile communication carrier.Under such situation, when portable terminal was mobile between the zone, portable terminal was by the different home address of the region allocation that is moved into.In communication from the outside, require exterior terminal to select the home address of addressable portable terminal, that is to say the operator zone of knowing that portable terminal is being visited, this enforceable communication efficiency and convenience of having reduced.
Simultaneously, can be used for the change that DNS that the corresponding relation to the host name of portable terminal and address manages supports home address, especially be used to the dynamic-dns that dynamically updates by utilization.Yet, from registering, therefore in the process of mobile terminal roaming being made quick response, produced many problems usually until making the DNS system stability will spend some minutes or more time.
By the way, in above-mentioned publication, be used for closed communication network, provide relevance by ownership database (HDB) 2302 on each communication network and Private Automatic Exchange (PABX) such as the such mobile communications network of GSM at it.Yet, there is such problem, promptly comprise the Internet shortcoming flexibility of the free distributed network of these mobile communications networks.
Summary of the invention
An object of the present invention is to provide a kind of management method of mobile and portable terminal, even the home address of portable terminal has taken place to change under such situation when portable terminal is roamed between the different mobile communications network of service form, thereby by utilizing representative home address can guarantee to tackle its Internet as distributed network flexibly from the safety of the incoming call of outside.
In order to address the above problem, the present invention proposes in the mobile communication system that adopts mobile IP, portable terminal is determined a main home agent and a main home address.When portable terminal moves to the different network of service form, employed home address in the immigration network area (inferior home address) is registered in the main home agent as initial Care-of Address.When the outside conducts interviews,,, also can carry out PERCOM peripheral communication by utilizing this main home address even be assigned under the situation of different home address in roaming between the Local Area Network and its at portable terminal by utilizing this main home address.In addition, utilizing under the situation of DNS, registering that main home address can eliminate must be to because the change of roaming caused each local home address (inferior home address) between Local Area Network be registered, and this can tackle the fast moving of portable terminal.
Be used to manage mobile method and comprise according to of the present invention: a home agent determining step is used for portable terminal, execution is to the location management of portable terminal, this portable terminal with communicate and between the subnet Local Area Network different, move at the access point apparatus that is used to dispose on the subnet of a Local Area Network with service form; One step be used for portable terminal with main home agent equipment given main home address be registered to server that the address to equipment manages to connect with this Local Area Network; And a home address registration step, when portable terminal moved on in another different Local Area Network of service form, this step made main home agent equipment that employed home address on institute's receiving area network is registered as Care-of Address.
Like this, even carry out between Local Area Network when mobile when portable terminal, also can make outsidely by utilizing identical address, promptly main home address visits this portable terminal.Can eliminate as traditional, between Local Area Network the confusion that change caused of home address during roaming.Can realize uniform mobile communication.
In addition, be used for managing mobile method according to of the present invention, portable terminal has been stored the relevant information of candidate that becomes main home agent equipment with home agent equipment in advance.
Like this, if obtained in advance with such as IP address such main home agent and the relevant information of main home address, this portable terminal can be realized location registration process fast in the destination of moving so.
In addition, be used to manage mobile method and further comprise such step according to of the present invention, this step makes portable terminal obtain to become with home agent equipment the relevant information of candidate of main home agent from Local Area Network.
Like this, because be required information in the Local Area Network that obtains to be moved at every turn, therefore can suppress the memory use amount of portable terminal.
In addition, be used for managing mobile method according to of the present invention, in the home agent determining step, portable terminal is as required by changing main home agent equipment from the relevant information of home agent equipment.
This can tackle the failure of home agent or tackle sharing of load tolerance in the home agent neatly.
In addition, be used for managing mobile method according to of the present invention, in the home agent determining step, according to the priority as one of information, portable terminal is determined main home agent equipment from the information relevant with home agent equipment.
This can predict to guarantee the advantage of network management the load of network or home agent.
In addition, in the method that management according to the present invention is moved, in the home agent determining step, according to the frequency of visit home agent equipment, portable terminal is determined main home agent from the information relevant with home agent equipment.
This can select a main home agent of its mobility that is suitable for portable terminal.Especially, can reduce transmission delay during registration one position, this can realize improving treatment effeciency.
In addition, be used to manage mobile method and further comprise a register requirement step that generates to the register requirement of home agent equipment according to of the present invention, this home agent equipment is arranged in a Local Area Network and links to each other by link layer and be in an effective status that can obtain the IP address of the link layer that portable terminal is handled, at least one converts effective status to from non-effective status, wherein, inferior home address registration step is carried out when inferior home agent equipment allows register requirement.
Compare with the mobile detection case that the change that is used to detect the IP address is such, this can realize detecting and handle the short time.
Portable terminal according to the present invention comprises: a main home agent is selected part, be used for selecting a main home agent equipment with the request location management and be used to generate one with main home agent equipment given main home address be registered to the request of the server that the address to the equipment that links to each other with Local Area Network manages; One moves the IP processing section, when moving to the different Local Area Network of service form, this moves the IP processing section and notifies time home agent equipment to require that institute's receiving area network of the employed Care-of Address of a subnet within employed home address on institute's receiving area network and the institute's receiving area network is carried out location management according to mobile IP protocol; And a home agent registration part, be used for employed main home address and time home address on main home agent equipment notice institute receiving area network.
Like this, even when portable terminal is mobile between Local Area Network, also can make the outside by utilizing identical address, promptly main home address visits this portable terminal.Can eliminate as traditional, between Local Area Network the confusion that change caused of home address during roaming.Can realize uniform mobile communication.
In addition, further comprise an attributed region storage area according to portable terminal of the present invention, this attributed region storage area is used for the store home list of proxies with as becoming the relevant message of candidate of main home agent equipment with home agent equipment, and wherein main home agent selects part to select a main home agent equipment from the home agent tabulation.
Like this, if obtain in advance with such as IP address such main home agent and the relevant information of main home address, so portable terminal can be in the destination of moving the quick location registration process of realization.
In addition, in portable terminal according to the present invention, main home agent is selected part to obtain the information relevant with home agent equipment from Local Area Network and it is stored in the attributed region storage area.
Like this, because just obtain required information in institute's receiving area network at every turn, therefore can suppress the memory use amount of portable terminal.
In addition, in portable terminal according to the present invention, main home agent selection portion branch changes the main home agent equipment in the home agent tabulation that is stored in the attributed region storage area according to needs.
Like this, as required by selecting or reselect a main home agent, can tackle the fault of home agent or tackle sharing of load tolerance in the home agent flexibly.
In addition, in portable terminal according to the present invention, according to as with home agent equipment priority one of for information about, main home agent is selected to select main home agent equipment in the home agent tabulation of part from be stored in the attributed region storage area.
This can predict to guarantee the advantage of network management the load on network or the home agent.
In addition, in portable terminal according to the present invention, the home agent equipment that main home agent is selected to select its access frequency to be equal to, or greater than a predetermined value in the home agent tabulation of part from be stored in the attributed region storage area is with as main home agent equipment.
This can select a home agent of its mobility that is suitable for portable terminal.Especially, can reduce transmission delay during registration one position, this can realize improving treatment effeciency.
In addition, in portable terminal according to the present invention, the home agent registration part has generated such request, promptly ask to be registered to time home agent equipment from the link layer that disarmed state converts effective status to by it, receive time home agent equipment when agreeing register requirement with box lunch, start the notice of time home address to main home agent equipment.
Compare with the mobile detection case that is used to detect the IP address modification, this can realize detecting and handle the short time.
In addition, in portable terminal according to the present invention, when receiving repeatedly the encapsulated information bag, mobile IP processing section adopts source address described in the inner letter head as the destination of registered location.
This has eliminated the possibility of the address of home agent equipment that has write down or access point apparatus being carried out repeated registration, has prevented that the useless of resource of portable terminal and home agent equipment from expending.
As mentioned above, according to the present invention,, also can guarantee incoming call by utilizing representative home address from the outside even under situation about roaming between the different mobile communication terminal of service form.
According to a kind of mobile method that is used to manage of the present invention, comprise: main home agent is selected step, the main home agent equipment of the location management of the described portable terminal of portable terminal selection carrying out, described portable terminal communicates with the accessing points equipment that is configured on the subnet that constitutes Local Area Network, and moves between the subnet in the same area net or between the different Local Area Network of service form; Determination step, whether described portable terminal changes by link layer or the communication medium that uses in the communication, judges that moving is moving between the subnet in the same area net, or moves between the different Local Area Network of service form; And first registration step, between the different Local Area Network of service form, having carried out when mobile when being judged to be described portable terminal, described portable terminal is registered to the main home address and time home address of described portable terminal in the described main home agent equipment.
In addition, the method that described management is moved, also comprise: second registration step, between the different Local Area Network of service form, carried out when mobile when being judged to be described portable terminal, described portable terminal will be in the subnet in the Local Area Network of mobile destination Care-of Address that use, described portable terminal and subnet home address be registered in the inferior home agent equipment of Local Area Network of the mobile destination of administration.
In addition, the method that described management is moved, also comprise: the 3rd registration step, described when moving when judging to mobile between the subnet of described portable terminal in the same area net, the Care-of Address of described portable terminal and the home address of affiliated area network are registered in the home agent equipment of affiliated area network.
In addition, the method that described management is moved, described portable terminal has been stored the information relevant with the home agent equipment of the candidate that becomes main home agent equipment in advance.
In addition, the method that described management is moved further comprises: the information obtaining step makes described portable terminal obtain the information relevant with the home agent equipment of the candidate that becomes main home agent from the home agent information-providing server.
In addition, the method that described management is moved is selected in the step at described main home agent, and described portable terminal uses and the relevant information of described home agent equipment, switches main home agent equipment as required.
In addition, the method that described management is moved is selected in the step at described main home agent, and described portable terminal is from the information relevant with described home agent equipment, according to select described main home agent equipment as the priority of one of described information.
In addition, the method that described management is moved is selected in the step at described main home agent, and the selection of described main home agent is carried out according in the stop number of times of described portable terminal in each zone and the visit bag amount at least one.
In addition, the method that described management is moved in described first registration step, when change has taken place the employed link layer of described communication of mobile terminal, is judged to be described portable terminal and moves between the different Local Area Network of service form.
In addition, the method that described management is moved, under the situation among home prefix information is included in the home agent tabulation, described time home address generates according to home prefix information.
A kind of portable terminal according to the present invention comprises: main home agent selected cell (18), the main home agent equipment of the location management of described portable terminal is carried out in selection, described portable terminal communicates with the accessing points equipment that is configured on the subnet that constitutes Local Area Network, and moves between the subnet in the same area net or between the different Local Area Network of service form; Network layer communication processing unit (12), whether described portable terminal changes by link layer or the communication medium that uses in the communication, judges that moving is moving between the subnet in the same area net, or moves between the different Local Area Network of service form; And home agent registering unit (19), between the different Local Area Network of service form, carried out when mobile when being judged to be described portable terminal, the main home address and time home address of described portable terminal is registered in the described main home agent equipment.
In addition, described portable terminal, further comprise: mobile IP processing unit (14), between the different Local Area Network of service form, carried out when mobile when being judged to be described portable terminal, will in the subnet in the Local Area Network of mobile destination, use, Care-of Address and subnet home address be registered in the inferior home agent equipment of Local Area Network of the mobile destination of administration.
In addition, described portable terminal, further comprise: mobile IP processing unit (14), described when moving when judging to mobile between the subnet of described portable terminal in the same area net, the Care-of Address of described portable terminal and the home address of affiliated area network are registered in the home agent equipment of affiliated area network.
In addition, described portable terminal also comprises: attributed region storage part, described portable terminal are stored the information relevant with the home agent equipment of the candidate that becomes main home agent equipment in advance.
In addition, for described portable terminal, described main home agent selected cell also makes described portable terminal obtain the information relevant with the home agent equipment of the candidate that becomes main home agent from the home agent information-providing server.
In addition, for described portable terminal, described main home agent selected cell also makes described portable terminal use and the relevant information of described home agent equipment, switches main home agent equipment as required.
In addition, for described portable terminal, described main home agent selected cell also makes described portable terminal from the information relevant with described home agent equipment, according to select described main home agent equipment as the priority of one of described information.
In addition, for described portable terminal, described main home agent selected cell also carries out the selection of described main home agent according in the stop number of times of described portable terminal in each zone and the visit bag amount at least one.
In addition, for described portable terminal, described home agent registering unit when change has taken place the employed link layer of communication, is judged to be described portable terminal and moves between the different Local Area Network of service form.
In addition, for described portable terminal, under the situation among home prefix information is included in the home agent tabulation, described time home address generates according to home prefix information.
As mentioned above, according to the present invention,, also can guarantee incoming call by utilizing representative home address from the outside even under situation about roaming between the different mobile communication terminal of service form.
Description of drawings
Fig. 1 has provided the schematic diagram according to the network configuration of the mobile communication system of the embodiment of the invention 1;
Fig. 2 has provided the schematic diagram according to the network configuration of the mobile communication system of the embodiment of the invention 1;
Fig. 3 has provided the schematic diagram according to the network configuration of the mobile communication system of the embodiment of the invention 1:
Fig. 4 has provided the schematic diagram according to first structure of the portable terminal of the embodiment of the invention 1;
Fig. 5 has provided the schematic diagram according to second structure of the portable terminal of the embodiment of the invention 1:
Fig. 6 has provided the schematic diagram according to first structure of the home agent equipment of the embodiment of the invention 1;
Fig. 7 has provided the schematic diagram according to second structure of the home agent equipment of the embodiment of the invention 1:
Fig. 8 has provided the schematic diagram according to first structure of the accessing points equipment of the embodiment of the invention 1;
Fig. 9 has provided the schematic diagram according to second structure of the accessing points equipment of the embodiment of the invention 1:
Figure 10 has provided the operational flowchart according to the portable terminal of the embodiment of the invention 1;
Figure 11 has provided the operational flowchart according to the home agent equipment of the embodiment of the invention 1;
Figure 12 A has provided the flow chart that operation is provided according to the information of the accessing points equipment of the embodiment of the invention 1;
Figure 12 B has provided the flow chart that operation is provided according to the information of the accessing points equipment of the embodiment of the invention 1;
Figure 13 has provided the flow chart that operation is provided according to the information of the accessing points equipment of the embodiment of the invention 1:
Figure 14 has provided the schematic diagram according to the regional network structure of the embodiment of the invention 1:
Figure 15 has provided according to the tabulate schematic diagram of an example of the home agent of the embodiment of the invention 1;
Figure 16 has provided the structural representation according to the home agent information providing apparatus of the embodiment of the invention 1;
Figure 17 A has provided the schematic diagram of binding high-speed cache one example that traditional home agent equipment managed;
Figure 17 B has provided the schematic diagram of binding high-speed cache one example of being managed according to the home agent equipment of the embodiment of the invention 1;
Figure 18 has provided the tabulate schematic diagram of an example of the Binding Update of managing according to the mobile terminal device of the embodiment of the invention 1;
Figure 19 has provided the schematic diagram from the bag of exterior terminal stream according to the embodiment of the invention 1;
Figure 20 has provided the schematic diagram according to the mobile communication system structure of the embodiment of the invention 2;
Figure 21 has provided the schematic diagram according to the binding update messages among the mobile IP of the embodiment of the invention 1;
Figure 22 has provided the schematic diagram according to the binding acknowledgement message among the mobile IP of the embodiment of the invention 1;
Figure 23 has provided the structural representation of traditional mobile communication system.
Embodiment
Utilize accompanying drawing to come embodiments of the invention are described below.It should be noted that identical assembly represents by additional identical Reference numeral.
(embodiment 1)
Utilize Fig. 1 to 22 to come embodiments of the invention 1 are described.
Fig. 1 to Fig. 3 and Figure 14 have provided the schematic network structure according to mobile communication system of the present invention.In Fig. 1 to Fig. 3, Local Area Network the 1,2, the 3rd has the Local Area Network of different service forms.Especially, Local Area Network 1 is portable terminal (MN) 10 selected and determined Local Area Networks, and Local Area Network the 2, the 3rd, the perimeter network.Home agent equipment (HA) 50-1,50-2,50-3 are respectively applied for management area network 1,2,3.Especially, home agent equipment 50-1 is that main home agent equipment (M-HA) manages with the attributed region network to portable terminal 10.Simultaneously, home agent equipment 50-2,50-3 are the inferior home agent equipment (HA-1, HA-2) on other Local Area Networks that are positioned at outside the attributed region network.Simultaneously, local area network system (DNS) server 20 is got in touch an IP address on a host name and the Internet, related management is carried out with host name and with Local Area Network 2 in the IP address that this server 20 pairs of home agent equipment 50-1 or its belong to the portable terminal 10 of Local Area Network 1,3 are defined as the perimeter network and further have the home agent device definition in the network of perimeter is time home agent equipment 50-2, such function of 50-3.
In addition, the structure that has respectively as shown in figure 14 of each Local Area Network 1,2,3.
In Figure 14, although accessing points equipment (AP) 60 carries out radio communication with portable terminal 10, this accessing points equipment can be not to be confined to this by utilizing the electric wire that is laid to come executive communication yet.The present invention also is not limited thereto.Simultaneously, local network 100 is subnets that are positioned within the Local Area Network.
In addition, home agent information-providing server (HIS) 70 have for portable terminal 10 provide be positioned at Local Area Network 1 on such function of the relevant information of home agent equipment 50.
As above the mobile method that manages on the mobile communication system can describe according to its operation and function.
When beginning, portable terminal 10 is appointed as attributed region network 1 with the Local Area Network 1 in a plurality of Local Area Networks 1,2,3, and selects home agent equipment 50-1 to manage with the address to portable terminal 10 as main home agent.
After this, home agent equipment 50-1 gives portable terminal 10 with home address assignment available on the Local Area Network.The home address that this distributed is defined as binding the main home address of high-speed cache.
Simultaneously, portable terminal 10 requests are registered to main home address among the DNS 20.When receiving this request, the name of 20 pairs of portable terminals of being asked 10 of DNS and home address carry out related registration.
Now portable terminal 10 being roamed (moving to subnet from subnet) such a case within attributed region network 1 describes.
When beginning, in a up-to-date subnet that moves into, portable terminal 10 comprises that at least Care-of Address CoA-M and main home address HoA-M will be being sent to main home agent equipment 50-1 in accordance with the login request message packing of mobile IP process.
After this, when receiving active registration request message (A1), 50-1 pair of main home agent equipment upgrades with the portable terminal 10 corresponding inlet content among self the binding high-speed cache and registration confirmation message packing is sent back portable terminal 10 (A2).
After this, the packet of being appointed as the home address HoA-M that is sent to portable terminal 10 can correctly be sent to portable terminal 10 thus by main home agent equipment 50-1, be sent on the Care-of Address CoA-M that is registered in the portable terminal 10 in the binding high-speed cache in the mode (A2) in tunnel.
Now by utilizing Fig. 2 to come the operation when leaving attributed region network 1 when portable terminal 10 and moving to perimeter network 2 under the administrative area that is in inferior home agent equipment 50-2 to describe.
At first, the subnet in the portable terminal 10 visit perimeter networks 2, and produce Care-of Address CoA-1 according to the network information of immigration subnet.This network information can be transmitted, and for example transmits by a router advertisement message bag.If it is not the such fact of attributed region network 1 that portable terminal 10 identifies the Local Area Network 2 of being visited, portable terminal 10 has obtained inferior home address HoA-1 so.This time home address is corresponding with a home address.
By the way, Care-of Address CoA-1 can be produced according to the network information or be come to receive a distribution by utilization such as the such agreement of DHCP (DHCP) from network and produce by portable terminal 10.
Obtain time home address HoA-1 according to the information that is obtained in the accessing points equipment 60 that links to each other with network or according to the information that is obtained in the home agent information-providing server 70 that links to each other with network.Specifically, portable terminal 10 sends to accessing points equipment 60 or home agent information-providing server 70 with an inquiry packet, and accessing points equipment 60 or home agent information-providing server 70 will include one of as shown in figure 15 home agent list content successively and confirm that bag sends it back portable terminal 10.In addition, portable terminal 10 receives and uses such packet, this packet to comprise that accessing points equipment 60 or home agent information-providing server 70 are broadcasted with fixed time interval or the content of a home agent of institute's multi-address broadcast tabulation.Here, below the information relevant with home agent equipment shown in Figure 15 is described.
IP address 141 is addresses of home agent equipment.Priority 1 42 is according to the surplus resources of home agent equipment or the determined priority that is suitable for selecting of loading condiction.Useful life 143 is the remaining operation time of home agent equipment 50.Home prefix 144 has provided the row home prefix that home agent equipment 50 will be managed.Simultaneously, in that home address assignment is given under the situation of portable terminal 10, the home address that is distributed is described.
This information that portable terminal 10 is obtained is to have bar none and the tabulate information of corresponding content of home agent.Specifically, obtain the information relevant with home agent equipment 50.Portable terminal 10 is by selecting a home agent equipment 50 based on any system of selection of priority 1 42, selects go up most one or choose at random in this tabulation.
As shown in figure 15, under the situation among home prefix information is included in the home agent tabulation, home address HoA-1 can produce according to relevant home prefix and obtain.The present invention adds home prefix information on the description project of the defined home agent tabulation of traditional mobile IP protocol to.In the home prefix row of home agent tabulation, one or more home prefix that each home agent is managed have been described.
By the way, this method be not limited to that portable terminal uses mobile prefix request/advertisement scheme or based on the dynamic home address discovery protocol of mobile IP protocol to obtain home agent tabulation and generation/acquisition home address HoA-1 thus.
After this, portable terminal 10 is registered to the up-to-date Care-of Address CoA-1 that obtains among the home agent equipment 50-2 (B1) with inferior home address HoA-1.In addition, portable terminal 10 is registered to inferior home address HoA-1 among the main home agent equipment 50-1 (B2) with main home address HoA-M as initial Care-of Address.
After this, when by with roam into from subnet the identical process of subnet receive from portable terminal 10 include the packets of information of login request message the time, main home agent equipment 50-1 and time home agent equipment 50-2 upgrade binding high-speed cache itself and send a packets of information with a registration confirmation message and arrive portable terminal 10.
After this, the packets of information that is sent to the portable terminal 10 of main home address HoA-M is that main home agent equipment 50-1 at first acts on behalf of reception.As relating to the result who binds high-speed cache itself, main home agent equipment 50-1 sends it to the inferior home address HoA-1 (B3) that is registered to Care-of Address CoA.
The packets of information that is sent to time home address HoA-1 is acted on behalf of reception by inferior home agent equipment (HA-1) 50-2.As relating to the result who binds high-speed cache itself, inferior home agent equipment 50-2 sends it to Care-of Address CoA-1 (B4), and at last it correctly is sent on the portable terminal 10 that is arranged in Local Area Network 2.
By utilizing Figure 19, the bag transformat in this duration is described.
When beginning, main home agent equipment 50-1 agency receives the packets of information that exterior terminal (CN) is 80 that sent, be sent to the portable terminal 10 of main home address HoA-M (1 (a 201) institute is given by letter), and sends it on the home address HoA-S of the current region of being registered in binding high-speed cache in the mode in tunnel.At this moment, provide letter 2 (203).
After this, act on behalf of the CoA that the inferior home agent equipment 50-2 that receives in the current region went up and be sent to tunnel style portable terminal 10 with the packets of information that tunnel style was transmitted.At this moment, further provide letter 3 (206).
After this, portable terminal 10 receives the transmission bag of these twice encapsulation, and the source address described in the penetralia letter 1 (204) is discerned with the source address as an exterior terminal CN.As required, the request of a location registration process produces to main home agent equipment.With regard to from other letters 2 (205) with believe and need not to generate register requirement, because they are registered with regard to the address that is obtained 3 (206).This can lower the resource overhead of portable terminal 10 and home agent equipment 50.
By the way, externally roam under the situation of (roaming into subnet from subnet) within the Local Area Network 2 at portable terminal 10, login request message just is sent to time home agent equipment 50-2.After this, externally in the process of roaming within the Local Area Network, the request of a request registration just produces to being used to manage this regional home agent equipment.
Operation when next, portable terminal 10 being withdrawed from perimeter network 2 and move to perimeter network 3 under the compass of competency that is in home agent 50-3 describes.
When beginning, portable terminal 10 visits are positioned at a subnet of perimeter network 3, and produce Care-of Address CoA-2 according to the network information of immigration subnet.Simultaneously, not the such fact of perimeter network 2 that attributed region network 1 neither be under its this moment if portable terminal 10 identifies the perimeter network 3 of being visited, portable terminal 10 has obtained inferior home address HoA-2 so.
By the way, similar with mobile phase to Local Area Network 2, Care-of Address CoA-2 is produced according to the network information by portable terminal 10, perhaps comes to receive a distribution such as the such agreement of DHCP (DHCP) from network and produces by utilizing.
Equally, this time home address HoA-2 can obtain by the method similar with obtain inferior home address in Local Area Network 2.
After this, portable terminal 10 is registered to the up-to-date Care-of Address CoA-2 that obtains among time home agent equipment 50-3 (C1) together with inferior home address HoA-2.In addition, portable terminal 10 is registered to inferior home address HoA-2 among the main home agent equipment 50-1 (C2) together with main home address HoA-M as initial Care-of Address.If by with to the mobile phase of Local Area Network 2 with process and from portable terminal 10, receive a packets of information that includes login request message, the packets of information that so main home agent equipment 50-1 and time home agent equipment 50-3 upgrade binding high-speed cache itself and will include registration confirmation message sends to portable terminal 10.
After this, similar with the mobile phase that arrives Local Area Network 2, the packets of information that is sent to the portable terminal 10 of home address HoA-M is at first acted on behalf of reception and after this is sent to the inferior home address HoA-2 (C3) that is registered to Care-of Address CoA by main home agent equipment 50-1.After being received by inferior home agent equipment 50-3 agency, it is sent to Care-of Address CoA-2 (C4), and last, correctly is sent to portable terminal 10.
Simultaneously, identify when not being such true of its perimeter network 2 under current at portable terminal 10, portable terminal 10 will comprise a useful life be zero and before the packets of information of defined login request message under the mobile IP protocol sends under on inferior home agent equipment 50-2 of perimeter network 2, produce a request that is used for deleting portable terminal 10 corresponding inlet items of the binding high-speed cache of being managed with time home agent equipment 50-2 thus.Yet main home agent equipment 50-1 is similar with being registered to, and one group is registered among the inferior home agent equipment 50-2 (C5) together as the inferior home address HoA-1 of home address with as inferior home address HoA-2 of initial Care-of Address.This can be sent to time home address HoA-1's and all send to portable terminal 10 (C6) in the packets of information that different time reaches the portable terminal 10 of time home agent equipment 50-2.
Simultaneously, in each moving process, it makes the mobile IP protocol rule (CoA-1 for example of in the subnet Care-of Address basis of active registration, CoA-2) remove to visit main home agent equipment 50-1 as Care-of Address CoA, perhaps as required, inferior home agent equipment (the inferior home agent equipment 50-2 in the above-mentioned example) under before the visit becomes possibility.Yet in this case, efficient is also bad, as long as registration will occur because shift out subnet in home agent equipment 50.Therefore, as in this embodiment, wish that (for example HoA-1 HoA-2) is registered among the main home agent equipment 50-1 as initial Care-of Address with effective home address on the current affiliated area network.
Next, by utilizing accompanying drawing to come the structure and the operation thereof of each equipment are described.
At first be noted that the structure and the basic operation of portable terminal 10.
Fig. 4 has provided in the block diagram of portable terminal 10 as portable terminal 10 under the situation of main frame.Fig. 5 has provided in the block diagram of portable terminal 10 as portable terminal 10 under the situation of router.
In Fig. 4 and Fig. 5, L1/ L2 processing section 11,16 are used for physical layer and data link layer are communicated processing, L3 processing section 12 is used for network layer is communicated processing, high-rise processing section 13 is used for such as TCP, the such high level of UDP or the like is handled, mobile IP processing section 14 is come the mobile of portable terminal managed according to mobile IP protocol, use processing section 15 and be used for the control application, attributed region storage area 17 is used to store and main home agent equipment or the attributed region network information relevant with main home address, main home agent selects part 18 to be used for selecting main home agent equipment 50 and request that main home address is registered to DNS 20, and home agent registration part 19 is used for main home agent equipment 50 is carried out the register requirement of destination home address (inferior home address).
By the way, although Fig. 5 has just provided two L1/ L2 processing sections 11,16 that link to each other with a network, this structure can comprise more L1/L2 processing section, and the present invention is not limited to specified number or amount.Even provide under the situation of three or more L1/L2 processing section, also can realize its operation by similar structure and following illustrated process.
Basic operation to the portable terminal 10 that as above disposed describes below.
The transmit operation of the portable terminal 10 of structure shown in Figure 4 is as follows.
To use the transmission data that processing section 15 produced by the high-rise processing section 13 of handling and be sent to the L3 processing section 12 that is used for the IP protocol processes according to the agreement of interface (socket) or TCP, UDP or the like.After this, the L3 processing section is carried out IP and is handled, and meanwhile mobile IP processing section 14 is carried out the additional IP letter head relevant with mobile IP and handled.Carry out in L1/L2 processing section 11 through the transmission data of these processing that SDL is handled and physical layer protocol is handled, and after this send it on the network that is under the Access status and (be called hereinafter, " accesses network ").
As described below, the reception operation of the portable terminal with host function 10 shown in Figure 4 is opposite with transmit operation.
That is to say that L1/L2 processing section 11 receives from the packets of information of accesses network and carries out physical layer protocol and the SDL processing.After this, the IP protocol processes is carried out in the L3 processing section, and meanwhile mobile IP processing section 14 is carried out the additional IP letter head relevant with mobile IP and handled.Subsequently, application processing section 15 is handled and after this data are sent to the 13 pairs of high levels in high-rise processing section.
Next, below the operation of the portable terminal with router feature shown in Figure 5 is described.
When beginning, 16 pairs of received packets of information execution of network (being called " internal network " hereinafter) internally physical layer protocol processing of L1/L2 processing section and SDL are handled.After this, the L3 processing section is carried out and is included the IP protocol processes that route is handled, and sends it to L1/L2 processing section 11 or L1/L2 processing section 16.As the result that the route in the L3 processing section 12 is handled, L1/L2 processing section 11 will be sent to L1/L2 processing section 11 or L1/L2 processing section 16 from the received packets of information of accesses network.Here, mobile IP processing section 14 is also carried out a standard mobile router and is handled, and promptly is an application of mobile IP protocol, so that provide it to move to the transparency of internal network.
In the process of portable terminal 10 roamings, provided in the same area network by moving between the mobile and zones of different network of subnet.These two kinds are moved and to be prevalent in the Care-of Address CoA that is obtained after will moving is registered to the affiliated area network together with home address HoA the situation of home agent equipment 50.
By utilizing Fig. 1 and Figure 10, at first the mobile such operation of passing through subnet in same area network 1 describes to portable terminal 10.Figure 10 has provided the flow chart relevant for the performed processing procedure of portable terminal of the present invention 10.
In when beginning, portable terminal 10 moves a subnet, and wherein the router that moves on the subnet from being arranged in by L1/L2 processing section 11 of L3 processing section 12 receives the network information.After this, produced the effective Care-of Address CoA in the associated sub network according to the L3 processing section 12 received network informations, and the network information of subnet before linking to each other in the received network information and the current storage is compared, detect thus and whether move (step S11).Realize that by mobile IP processing section 14 this moves detection and handles.
By the way, except said method, also can use among the step S11 to be used to detect mobile additive method.
After this, handle the result of (step S11) as the mobile detection of L3 processing section 12, mobile IP processing section 14 judges between the subnets whether have mobile (step S12).
By the way, except said method, move to detect the beginning condition of (S11) and can use lower level, that is to say that beginning is by L1/L2 processing section 11 or finish the transfer that trigger (Complete Trigger) carried out and handle.During this time, need to link to each other between L1/L2 processing section 11 and the mobile IP processing section 14.
Next, detecting under the mobile still situation that subnet does not become, the promptly up-to-date network information that obtains is identical with a network information that is obtained before, handles turning back to step S11.
On the other hand, be under the situation by subnet moving, by using area I D, prefix information or the authentication processes etc. that from the network information, obtained, determine that the subnet that moved into is whether within same area (step S13).If within same area, effective home address HoA-M is registered among the home agent equipment 50-1 (step S14) in new Care-of Address CoA-M that so mobile IP processing section 14 will be obtained in subnet and the Local Area Network 1.
By the way, mobile IP processing section 14 performed registration processes comprise that a packets of information that will include a defined login request message under mobile IP protocol (binding update messages 1000 for example shown in Figure 21) sends to the operation (A1) of home agent equipment 50-1, and an operation (A2) that from home agent equipment 50-1, receives the packets of information that comprises an active registration acknowledge message (binding acknowledgement message 1010 for example shown in Figure 22), therefore this process can correctly be finished in mobile IP processing section 14.In the mobile option of binding update messages 1000 and binding acknowledgement message 1010, the Care-of Address CoA-M and the home address HoA-M that will be informed to home agent equipment 50-1 have been described.
Simultaneously, under the situation with different link layers or communication medium shown in Figure 5, according in the communication process the actual link layer that uses or communication medium change or do not change, portable terminal 10 can determine whether the subnet that is moved into is on the different Local Area Network (step S13).That is to say to have structure shown in Figure 5 and L1/L2 processing section 16 at portable terminal 10 and be connected with such accesses network, this accesses network is under the administrative area of a Local Area Network different with the administrative area of L1/L2 processing section 11.At the transmission destination that will send and receive when L3 processing section 12 when L1/L2 processing section 11 is changed to L1/L2 processing section 16, can be simultaneously to moving and detecting to different sub-network to the mobile of zones of different network.
By the way, the such network 1 in compass of competency of main home agent equipment 50-1 is for example understood in above-mentioned explanation.Yet, in another zone 2 or 3, just become home agent 50-2 or the 50-3 except home agent equipment as the registration destination, can carry out moving within the same area network by similar processing.
Next utilize Fig. 2 and Figure 10 operation when portable terminal 10 is mobile between the zones of different network to be described by move to zone 2 these examples from zone 1.
Mobile IP processing section 14 is identified at step S13 portable terminal 10 and is in the zone different with the subnet that is moved into, mobile IP processing section 14 has obtained the effective home address HoA-1 (step S15) on the Local Area Network 2, and it is registered to the home agent equipment 50-2 last (step S16) that is arranged in Local Area Network 2 with the Care-of Address CoA-1 that is obtained before.
After this, home agent registration part 19 is registered to main home address HoA-M and the home address HoA-1 that obtained in 2 in the zone among the main home agent equipment 50-1 (step S17).
At this moment, one of attributed region storage area 17 storage is used for the Binding Update tabulation that the log-on message to main home agent equipment 50-1 manages, and perhaps home agent registration part 19 adds a main home address HoA-M of expression and corresponding inlet item between time home address HoA-1 to Binding Update tabulation that mobile IP processing section 14 had and upward and to it upgrades.Form is as shown in figure 18 adopted in this Binding Update tabulation, and it comprises the inlet item 170 of the home agent equipment 50-2 (HA-1) in regional 2 and the inlet item 180 of the main home agent equipment 50-1 (M-HA) in 1 (attributed region) of zone at least.
By the way, among step S16 and the step S17, comprise the operation of the login request message that location registration process among a transmission and the step S14 is similar and from home agent equipment 50, receive the such operation of an effective acknowledge message to the registration of each home agent equipment 50, so that this processing can correctly be finished in mobile IP processing section 14.Simultaneously, home agent registration part 19 independently produces in accordance with the login request message of mobile IP protocol and to it and sends, and perhaps generates the request that a request produces a login request message and sends it to mobile IP processing section 14.
Here, mobile IP processing section 14 sends a login request message that is sent to main home agent equipment 50-1 by the home agent equipment 50-2 in the affiliated area.During this time, a reverse tunnel is applied between portable terminal 10 and the home agent equipment 50-2.And this moment, the source address of login request message is a home address that is assigned in the affiliated area.In contrast, although main home agent equipment 50-1 sends to registration confirmation message on the home address of the portable terminal 10 in the affiliated area, this registration confirmation message is sent on the Care-of Address CoA-1 of portable terminal 10 by the mode that home agent equipment 50-2 agency receives and transmits with the tunnel.
As mentioned above, portable terminal 10 belongs at least one attributed region network 1 so that it has the effective main home address HoA-M on the attributed region network 1.Portable terminal 10 is specified home Local Area Network or main home agent equipment in advance, and this information or main home address are stored in the attributed region storage area 17.Yet as previously mentioned, main home agent selects part 18 preferably to obtain home agent tabulation shown in Figure 15 from accessing points equipment 60 or home agent information-providing server 70, with from wherein selecting best one.The home agent tabulation that main home agent selects part 18 to be obtained is stored in the attributed region storage area 17 in advance, thus if needed then according to the priority 1 42 in the home agent tabulation or according to frequency that belongs to each Local Area Network or selecting at random.
Below this system of selection is described.
In when beginning, main home agent selects part 18 monitoring/measurement in advance to stop once in each Local Area Network or repeatedly and the packets of information quantity of being visited or the like.Its aggregate values in the time of in being input to the home agent tabulation together, is stored in the attributed region storage area 17.When the time of staying reached a scheduled time, master agent selected part 18 to adopt affiliated at this moment Local Area Network as the attributed region network.The home agent equipment that main home agent is selected part 18 to reselect to have limit priority 142 is with as main home agent equipment, and this priority is to calculate according to the load or the surplus resources that are in the home agent equipment among this Local Area Network.By the way, will the home agent tabulation not be used as the destination of storing above-mentioned time total value.In this case, what regain is the tabulation of following home agent equipment, this home agent equipment belongs to the zone that is chosen as attributed region, what perhaps extract in addition is such inlet item, this inlet item is included into from acquired home agent tabulation among the selected attributed region information (prefix etc.) of coming out, can select main home agent equipment thus.
After this, main home agent selects part 18 requests that one home address is registered on the DNS, and this DNS manages by the address of the 14 pairs of Local Area Networks in mobile IP processing section.
As mentioned above, when on this Local Area Network, roaming, by adopting one group to abide by the main home address of mobile IP protocol and inferior home address on the affiliated area network, the binding registration on one of the portable terminal execution of the present invention main home agent equipment 50-1 in the attributed region network.Like this, owing to carry out relay transmission,, also can receive communication data from exterior terminal even when therefore between the Local Area Network of different service forms, roaming by main home agent equipment and time home agent equipment.Simultaneously, owing to move to such fact on each home agent equipment, therefore when adjusting alternately, do not need the home agent equipment of the different Local Area Network of service form to carry out from the notice of portable terminal.
In addition, because portable terminal can be selected attributed region network and main home agent equipment, therefore can adopt such Local Area Network to be used as the attributed region network, promptly this Local Area Network can receive the optimal service on the transfer point, can improve user convenience thus.This provides great effect, especially under situation about roaming between the different Local Area Network of service form.
Next structure and the basic operation to home agent equipment 50 describes.
Fig. 6 and Fig. 7 are the structural representations of home agent equipment 50.Physical layer process/data link layer deals is carried out in L1/ L2 processing section 51,56, network layer handles is carried out in L3 processing section 52, the processing that carry out such as such high level such as TCP, UDP high-rise processing section 53, the mobile management of portable terminal is carried out in mobile IP processing section 54, uses the control that carry out using processing section 55.
By the way, although Fig. 7 has only provided two L1/L2 processing sections that link to each other with a network 51,56, this structure can comprise more L1/L2 processing section.The present invention is not limited to the number of its defined.Even under the situation that three or more L1/L2 processing sections are provided, also can realize its operation by similar structure and the following process that will illustrate.
Basic operation to the home agent equipment 50 that as above disposed describes below.
Figure 11 is the performed processing procedure in the mobile IP processing section 54 of home agent equipment 50.
In when beginning, location management to portable terminal 10 is carried out according to mobile IP protocol in mobile IP processing section 54.That is to say that mobile IP processing section 54 receives packets of information (step S51) from portable terminal 10 by 51/L3 processing section, L1/L2 processing section 52, and determine whether comprise an active registration request message (step S52) in its packets of information.Include in this packets of information under the situation of an active registration request message, mobile IP processing section 54 is carried out a binding high-speed cache and is upgraded processing (step S53).
In binding high-speed cache renewal process (step S53), carry out following processing.Exist in the binding high-speed cache under being in home agent equipment 50 management under the situation of an inlet of portable terminal 10, its content is upgraded.Do not exist under the situation of inlet, be included in home address within the login request message, Care-of Address, useful life or the like such information by utilization and newly create the item that enters the mouth such as portable terminal 10.Here, the data structure to the binding high-speed cache describes.Figure 17 (a) has provided traditional binding high-speed cache inlet item 150, and Figure 17 (b) has provided the binding high-speed cache inlet item 160 that the present invention produced simultaneously.
Such field has been described in mobile IP processing section 54, and promptly the required entries comprises useful life 154 (BC useful life), login request message sequence number (BU sequence number) 155 and the register requirement sign (BU sign) 156 of the home address 151 of portable terminal 10 and Care-of Address 152, register requirement useful life (BU useful life) 153, this inlet.Traditional inlet item has been described the home address (HoA-1) in home address field and be in subnet address (CoA-1) under the visit in care-of address field 152.On the contrary, inlet item 160 of the present invention is with its difference, has described the home address (HoA-1) of having described the Local Area Network of being visited in main home address (HoA-M) and the care-of address field 152 in the home address field 151.In addition, the invention is characterized in, do not need mobile IP processing section 54 to add on the binding high-speed cache inlet item, that is to say according to the original state that moves defined home agent equipment 50 under the IP in standard and use describing the relevant any new processing of content with all.
After this, mobile IP processing section 54 finish upgrade the binding high-speed cache after, mobile IP processing section 54 will include the registration confirmation bag that the binding high-speed cache upgrades successfully/fail by 52/L1/L2 processing section, L3 processing section 51 and send to portable terminal 10 (step S54).
On the other hand, do not comprise in received bag under the situation of effective login request message that in L3 processing section 52, mobile IP processing section 54 is carried out the common IP layer that does not include the IP process and handled (step S57).
Simultaneously, in step 51, handling received bag at mobile IP is not under the situation from portable terminal 10, determines whether it is sent to portable terminal 10 (step S55).
It is being sent under the situation of portable terminal 10, mobile IP processing section 54 by with home address HoA as the relevant inlet item of keyword search and portable terminal 10 in the binding high-speed cache.Exist under the situation of an inlet, utilize to have the Care-of Address that to be registered and encapsulate received packets of information and it is sent to L3 processing section 52 and L1/L2 processing section 51 successively as the IP letter head of destination.Simultaneously, under the situation that does not have the inlet item, received packets of information is routed to the local network (step S56) that links to each other with home agent equipment 50.For example, have at home agent equipment 50 under the situation of structure of Fig. 6, send it on the network according to the order of L3 processing section 52 and L1/L2 processing section 51.Under the structure of Fig. 7, send it on the local network according to the order of L3 processing section 52 and L1/L2 processing section 56.
On the other hand, be not sent in packets of information under the situation of home address of portable terminal 10, handle moving on to step S57.
Simultaneously, have at home agent equipment 50 under the situation of structure shown in Figure 6, determine at step S55 when L3 processing section 52 and mobile IP processing section 54 received packets of information not to be sent to portable terminal 10 but when it is sent to home agent equipment 50, send it to application processing section 55 by high-rise processing section 53, so it is subjected to using processing.In addition, under the situation that is not sent to home agent equipment 50, by L1/L2 processing section 51 it is resend on the network once more.
Simultaneously, have at home agent equipment 50 under the situation of a plurality of physical links shown in Figure 7, according to the routing table that is under 52 management of L3 processing section received bag is sent to L1/ L2 processing section 51 or 56, to send it on the network once more.
By the way, in structure shown in Figure 7, this structure further comprises high-rise processing section 53 that links to each other with L3 processing section 52 and the application processing section 55 that links to each other with high-rise processing section 53.In this case, realize its processing by the operation that enforcement is relevant with the explanation of Fig. 6 and Fig. 7 synthetically.That is to say, determined to be sent in L3 processing section 52 under the situation of packets of information of itself, send it to by high-rise processing section 53 and use processing section 55.Simultaneously, be not sent to the home address HoA that offers portable terminal 10 and determine under the situation that packets of information is not sent to itself determining received packets of information, according to the routing table that is under 52 management of L3 processing section received bag is sent to L1/ L2 processing section 51 or 56, to send it on the network once more.
As mentioned above, because home agent equipment 50 will arrive the binding high-speed cache from the position information registration of portable terminal 10, so that send the received subsequently packets of information that is sent to portable terminal, can correctly transmit the data that are sent to portable terminal according to the binding high-speed cache of being registered.
Next structure and the operation to accessing points equipment 60 describes.
Fig. 8 is the structure that is used as under the situation of a bridge at accessing points equipment 60, and Fig. 9 is as the structure under the situation of a router at accessing points equipment 60 simultaneously.Simultaneously, first network is the network that is positioned on its side that links to each other with portable terminal 10.
In Fig. 8, physical layer process is carried out in L1 processing section 61,63, L2 processing section 62 is carried out transmissions/receptions packets of information and wrap the such data link layer deals of relaying (bridge joint) between L1 processing section 61,63, and home agent information processing part 64 is by utilizing the IP packets of information and obtain and providing home agent information to carry out the high level processing at layer 3 (L3) or high-rise going up thus.By the way, with regard to high level was handled, to a position of L2 processing section 62, the high level processing that can be on L3 or the high level provided a high-rise processing unit.
Fig. 9 is second structural representation of accessing points equipment 60.L1/L2 processing section 65,67 carry out physical layer process and data link layer deals, transmission/reception packets of information are carried out and in L1/L2 processing section 65 in L3 processing section 66, wrap the such network layer handles of relaying (route) between 68, home agent information processing part 68 obtains and provides home agent information by utilizing the IP packets of information, therefore carries out high-rise the processing at layer 4 (L4) or high-rise going up.By the way, with regard to more high-rise processing, on a position of L3 processing section 66, the high level processing that can be on L4 or the high level provides a high-rise processing unit.
Operation to the accessing points equipment 60 that as above disposed describes below.
Figure 13 has provided the processing procedure that accessing points equipment 60 obtains home agent information and with fixed time interval the information that is had upgraded.
In Figure 13, whether home agent information processing part 64,68 is always checked within the information updating time (step S64).Under the situation within the information updating time, produce a Query Information bag and send it to second network (step S65) by 62/L1 processing section, L2 processing section 63 or by 66/L1/L2 processing section, L3 processing section 67.In this case, any broadcast address of the destination home agent equipment 50 that can be under mobile IP protocol to be regulated or the unicast address of home agent equipment 50.By the way, as required inquiry packet is sent to first network or first and second network.
In addition, home agent information processing part 64,68 is broadcast to the destination by specifying whole network, perhaps specifies by the home prefix information of being stored in advance unicast address that produced, that will be sent to home agent equipment.Yet clean culture is to be sent to home agent equipment 50.Inquiry packet can be abideed by the dynamic home address of being regulated and find under mobile IP protocol.By the way, by utilizing timer or artificial mode to come the timing of lastest imformation.
After this, home agent information processing part 64,68 receives effective affirmation bag from least one or a plurality of home agent equipment 50 and its content of storage/preservation (step S66) by 63/L2 processing section, L1 processing section 62 or by 67/L3 processing section, L1/L2 processing section 66.Home agent information processing part 64,68 obtains the information relevant with home agent equipment shown in Figure 15 from one or more home agent equipment 50, create the inlet item 110 to 130 relevant with home agent equipment 50 thus.
By the way, stored/information of being preserved is saved in the next information updating time at least, and after upgrading a period of time that the preservation of its preparation is constant.
As mentioned above, accessing points equipment 60 regularly obtains the information relevant with home agent equipment that a Local Area Network that is used to connect is had jurisdiction 50, has up-to-date home agent information thus.
Simultaneously, accessing points equipment 60 provides home agent information to portable terminal 10.
Provide the such processing procedure of home agent information to describe to home agent information processing part 64 below.
Figure 12 (a) has provided accessing points equipment 60 and provides home agent information processing process according to the request of portable terminal 10.Figure 12 (b) has provided 60 periodic broadcastings of accessing points equipment or multiplex broadcasting home agent information processing process.
In Figure 12 (a), 64,68 pairs of home agent information processing parts are checked (step S61) by 61/L2 processing section, L1 processing section 62 or by 65/L3 processing section, L1/L2 processing section 66 from a request signal or packets of information that portable terminal 10 receives.
When receiving these request signals, home agent information processing part 64,68 read stored/information relevant of being preserved and create an answer signal or packets of information (step S62) with home agent equipment.
After this, home agent information processing part 64,68 is by 62/L1 processing section, L2 processing section 61 or 66/L1/L2 processing section, L3 processing section 65 and these answer signals or packets of information are sent to portable terminal 10 (step S63).
Simultaneously, in Figure 12 (b), home agent information processing part 64,68 determines whether it is in for portable terminal 10 to be provided in the timing of information (step S71).Under the situation that is in the timing that information is provided, read with stored before/the relevant information of the home agent equipment preserved to be to produce an answer signal or packets of information (step S72).
After this, home agent information processing part 64,68 is broadcast on first network of admitting portable terminal 10 (step S73) by 62/L1 processing section, L2 processing section 61 or 66/L1/L2 processing section, L3 processing section 65.Here, by utilizing timer or artificial mode control information to provide regularly.
As mentioned above, accessing points equipment of the present invention can be according to a request or the regular home agent information that provides of portable terminal.This can make portable terminal obtain home agent information from the accessing points equipment that is arranged in the most nearby, therefore can reduce the processing time that is used to send control data when beginning to communicate by letter.
Structure and operation to home agent information-providing server 70 describes below.
Figure 16 is the structural representation of home agent information-providing server 70.Physical layer and data link layer deals are carried out in L1/L2 processing section 71, L3 processing layer 72 is carried out network layer handles, the relevant information of the 73 gathering/storages of home agent information processing part and home agent equipment 50 offers portable terminal 10 with the home agent information of being stored thus to be used to manage continuous network area.
Operation to the home agent information-providing server 70 that as above disposed describes below.
Home agent information processing part 73 is carried out and the similar operation of the home agent information processing part 64,68 of accessing points equipment 60.
In other words, by processing shown in Figure 13, home agent information processing part 73 regularly obtains the information relevant with a Local Area Network being had jurisdictional home agent equipment 50.In addition, by Figure 12 (a) with the processing (b), termly or according to the request of portable terminal 10 and home agent information is offered portable terminal 10.
As mentioned above, home agent information-providing server 70 of the present invention is collectively managed the information relevant with home agent equipment.Therefore, such function needn't be set, promptly each accessing points equipment 60 with the home agent information aggregation together and provide it to portable terminal, thereby reduced system synthesis this.
By the way, though when portable terminal about being positioned at a plurality of home agent equipment 50 roaming within the same area, also can be similarly home agent information be offered portable terminal 10 according to the request of portable terminal.
As mentioned above, in the present embodiment, when portable terminal distributed a different home address in the receiving area network to some extent, main home agent was managed the communication of main home address.Therefore, the change of the home address that it is caused in the time of can supporting owing to roaming between mobile communications network, in some sense, its exterior terminal is as can be known.
In addition, because portable terminal is allowed to select a desirable main home agent, therefore can tackle the different Local Area Network of service form flexibly.
And owing to home address being registered in the main home agent rather than as the Care-of Address among traditional mobile IP, therefore can reducing the frequency of the Location Registration of main home agent, this can reduce network load.
(embodiment 2)
Figure 20 has provided the network configuration of the mobile communication system in the embodiment of the invention 2.
The difference of this embodiment and embodiment 1 be to provide a plurality of main home agent equipment (main home agent equipment 50-4,50-5).In addition, the illustrated equipment of the equipment that is used for constituting this mobile communication system and embodiment 1 is identical.
Below the method for mobile communication in the mobile communication system that constitutes like this is described.
Portable terminal 10 has HoA-M1 and HoA-M2 (corresponding with main home agent equipment 50-4 and 50-5 respectively) with as main home address.In this case, among the inferior home agent equipment 50-6 that portable terminal 10 inferior home address HoA-S that will obtain by visit institute receiving area network 6 and Care-of Address CoA-S are registered to Local Area Network 6.Meanwhile, portable terminal 10 is registered to the main home address HoA-M1 and time home address HoA-S of Local Area Network 6 among the main home agent equipment 50-4, and inferior home address HoA-S that will be identical with main home address HoA-M2 is registered among the main home agent equipment 50-5.
Like this, will be sent to portable terminal 10 and communication data that be sent to main home address HoA-M1 or HoA-M2 is sent to time home agent 50-6 and will transmits and the communication data that comes is sent to portable terminal 10 from inferior home agent 50-6.
Therefore by having a plurality of main home address, a for example private main home address that uses can use for its home agent equipment that is assemblied on the home gateway in self casing, and a commercial simultaneously main home address that uses can be for the gateway use of a company.Like this, even under that the internet providers provided, the accessed employed situation of home agent equipment, the place when going on business for example, the incoming call that can guarantee to be sent to the private main home address that uses with and be sent to the safety of the incoming call of the commercial main home address that uses.
Industrial applicibility
As mentioned above, the present invention is used for carrying the mobile communication of roaming between the mobile communications networks on the ripple basis (Carrier-by-Carrier Basis), different service forms at carrier wave, and on its internet as distributed network, the present invention is by utilizing representational home address to be applicable to the incoming call of tackling neatly from the outside.

Claims (20)

1. one kind is used to manage mobile method, comprising:
Main home agent is selected step, the main home agent equipment of the location management of the described portable terminal of portable terminal selection carrying out, described portable terminal communicates with the accessing points equipment that is configured on the subnet that constitutes Local Area Network, and moves between the subnet in the same area net or between the different Local Area Network of service form;
Determination step, whether described portable terminal changes by link layer or the communication medium that uses in the communication, judges that moving is moving between the subnet in the same area net, or moves between the different Local Area Network of service form;
First registration step has been carried out between the different Local Area Network of service form when mobile when being judged to be described portable terminal, and described portable terminal is registered to the main home address and time home address of described portable terminal in the described main home agent equipment.
2. the method that management according to claim 1 is moved, the method that described management is moved also comprises:
Second registration step, between the different Local Area Network of service form, carried out when mobile when being judged to be described portable terminal, described portable terminal will be in the subnet in the Local Area Network of mobile destination Care-of Address that use, described portable terminal and subnet home address be registered in the inferior home agent equipment of Local Area Network of the mobile destination of administration.
3. the method that management according to claim 1 is moved also comprises:
The 3rd registration step, described when moving when judging to mobile between the subnet of described portable terminal in the same area net, the Care-of Address of described portable terminal and the home address of affiliated area network are registered in the home agent equipment of affiliated area network.
4. the method that management according to claim 1 is moved, described portable terminal have been stored the information relevant with the home agent equipment of the candidate that becomes main home agent equipment in advance.
5. the method that management according to claim 1 is moved further comprises:
The information obtaining step makes described portable terminal obtain the information relevant with the home agent equipment of the candidate that becomes main home agent from the home agent information-providing server.
6. the method that moves according to claim 4 or 5 described management is selected in the step at described main home agent, and described portable terminal uses and the relevant information of described home agent equipment, switches main home agent equipment as required.
7. the method that moves according to claim 4 or 5 described management, select in the step at described main home agent, described portable terminal is from the information relevant with described home agent equipment, according to select described main home agent equipment as the priority of one of described information.
8. the method that management according to claim 1 is moved is selected in the step at described main home agent, and the selection of described main home agent is carried out according in the stop number of times of described portable terminal in each zone and the visit bag amount at least one.
9. the method that management according to claim 1 is moved, in described first registration step, when change has taken place the employed link layer of described communication of mobile terminal, be judged to be described portable terminal and between the different Local Area Network of service form, move.
10. the method that management according to claim 1 is moved, under the situation among home prefix information is included in the home agent tabulation, described time home address generates according to home prefix information.
11. a portable terminal comprises:
Main home agent selected cell (18), the main home agent equipment of the location management of described portable terminal is carried out in selection, described portable terminal communicates with the accessing points equipment that is configured on the subnet that constitutes Local Area Network, and moves between the subnet in the same area net or between the different Local Area Network of service form;
Network layer communication processing unit (12), whether described portable terminal changes by link layer or the communication medium that uses in the communication, judges that moving is moving between the subnet in the same area net, or moves between the different Local Area Network of service form; And
Home agent registering unit (19) has been carried out between the different Local Area Network of service form when mobile when being judged to be described portable terminal, and the main home address and time home address of described portable terminal is registered in the described main home agent equipment.
12. portable terminal according to claim 11 further comprises:
Mobile IP processing unit (14), between the different Local Area Network of service form, carried out when mobile when being judged to be described portable terminal, will in the subnet in the Local Area Network of mobile destination, use, Care-of Address and subnet home address be registered in the inferior home agent equipment of Local Area Network of the mobile destination of administration.
13. portable terminal according to claim 11 further comprises:
Mobile IP processing unit (14), described when moving when judging to mobile between the subnet of described portable terminal in the same area net, the Care-of Address of described portable terminal and the home address of affiliated area network are registered in the home agent equipment of affiliated area network.
14. portable terminal according to claim 11 also comprises:
Attributed region storage part, described portable terminal are stored the information relevant with the home agent equipment of the candidate that becomes main home agent equipment in advance.
15. portable terminal according to claim 11, described main home agent selected cell also makes described portable terminal obtain the information relevant with the home agent equipment of the candidate that becomes main home agent from the home agent information-providing server.
16. according to claim 14 or 15 described portable terminals, described main home agent selected cell also makes described portable terminal use and the relevant information of described home agent equipment, switches main home agent equipment as required.
17. according to claim 14 or 15 described portable terminals, described main home agent selected cell also makes described portable terminal from the information relevant with described home agent equipment, according to select described main home agent equipment as the priority of one of described information.
18. portable terminal according to claim 11, described main home agent selected cell also carry out the selection of described main home agent according in the stop number of times of described portable terminal in each zone and the visit bag amount at least one.
19. portable terminal according to claim 11, described home agent registering unit when change has taken place the employed link layer of communication, is judged to be described portable terminal and moves between the different Local Area Network of service form.
20. portable terminal according to claim 11, under the situation among home prefix information is included in the home agent tabulation, described time home address generates according to home prefix information.
CN2009101184548A 2002-07-30 2003-07-25 Mobility managing method and mobile terminal Expired - Lifetime CN101500219B (en)

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