CN101848514A - Method for switching WiMAX access network to WiFi access network and relevant equipment - Google Patents
Method for switching WiMAX access network to WiFi access network and relevant equipment Download PDFInfo
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- CN101848514A CN101848514A CN200910119615A CN200910119615A CN101848514A CN 101848514 A CN101848514 A CN 101848514A CN 200910119615 A CN200910119615 A CN 200910119615A CN 200910119615 A CN200910119615 A CN 200910119615A CN 101848514 A CN101848514 A CN 101848514A
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Abstract
The embodiment of the invention discloses a method for switching a WiMAX access network to a WiFi access network and relevant equipment, . Thewherein the method comprises the following steps of: receiving access network switching request information transmitted sent by a terminal through the WiMAX access network; keeping the current business connection of the terminal in a WiMAX core network; transmitting sending access network switching response information to the terminal through the WiMAX access network to switch radio frequency by using the terminal and then carrying out network accessing through the WiMAX access network; receiving the address binding and updating information of the terminal, wherein the address binding and updating information is transmitted by the WiMAX access network and comprises the first address of the terminal when the terminal passes through the WiMAX access network; and switching the current business connection of the terminal to the first address. By using the embodiment of the invention, the business continuity in the process of switching to the WiFi from the WiMAX in a single-radio frequency mode can be ensured.
Description
Technical field
The present invention relates to wireless communication technology field, particularly relate to method and relevant device that a kind of WiMAX Access Network switches to the WiFi Access Network.
Background technology
WiFi (Wireless Fidelity, Wireless Fidelity) is a kind of important wireless local area network technology, also is a kind of WiMAX access technology simultaneously.There is a large amount of WiFi focuses in the whole world in operation at present, and wireless Internet services free or that pay are provided.WiMAX (Worldwide Interoperability for Microwave Access, micro-wave access global inter communication) also is a kind of WiMAX access technology, and the whole world has numerous operators to use WiMAX technology building wireless wideband access network.
WiFi and WiMAX are important WiMAX access technologies, and each have their own again pluses and minuses.Wherein, WiFi cloth net spee is fast, cost is low, bandwidth is high, use frequency spectrum to need not to authorize, but network coverage is little.The WiMAX network coverage is big, but has a lot of users in large coverage, thereby causes the average user bandwidth to descend.Therefore, with WiFi as the replenishing of WiMAX, a little less than indoor WiMAX signal or densely populated place use WiFi, thereby can solve the little shortcoming of WiMAX bandwidth.At present, WiMAX and the mutual technology groups of WiFi are set up in the WiMAX Forum plan, the interaction technique of research WiMAX and WiFi, and how research arrives the core network of WiMAX by the WiFi network insertion, and switch between WiMAX and two access networks of WiFi.
In the present handoff technique, dual-mode terminal can have two kinds of working methods when a kind of Access Network switches to another kind of Access Network, and a kind of is injection working method frequently, and a kind of is dijection working method frequently.When being operated in injection mode following time frequently, has only a radio frequency before and after switching in work, be difficult to guarantee professional continuity like this, for example, when between WiMAX base station and WiFi focus, switching, terminal is connected and can interrupts with business network foundation, and the user also needs to enter again settings such as network after switching.When being operated in dijection mode following time frequently, two radio circuits of dual-mode terminal are worked simultaneously before and after switching, for example when the WiMAX radio frequency is communicated by letter normally, the WiFi radio frequency can network, authentication and work such as connect, afterwards the business datum path is switched on the newly-built path, just close the WiMAX radio frequency at last, can realize smoother handoff procedure like this, but, for WiMAX and WiFi dual-mode terminal, the frequency spectrum that is adopted for the WiMAX network of most actual deployment, because WiMAX radio frequency and WiFi radio frequency can be to causing bigger interference each other when working simultaneously, therefore, WiMAX in fact, there is big difficulty in WiFi dijection mode of operation frequently when concrete the application, can effectively solve interference problem still have definite answer.
Summary of the invention
Method and relevant device that the embodiment of the invention provides a kind of WiMAX Access Network to switch to the WiFi Access Network under the bonding rf-mode, switch to business continuance the WiFi process from WiMAX.
The embodiment of the invention discloses a kind of micro-wave access global inter communication WiMAX Access Network and switch to the method for Wireless Fidelity WiFi Access Network, comprising: the Access Network handoff request message that receiving terminal sends by the WiMAX Access Network; Keep the current business of described terminal to connect in the WiMAX core net; Send the Access Network switching response message by the WiMAX Access Network to described terminal,, carry out network insertion by the WiFi Access Network so that described terminal is switched radio frequency; Receive the address binding updating message of the described terminal of described WiFi Access Network transmission, first address of the described terminal when comprising described terminal in the described address binding updating message by the access of WiFi Access Network; The current business connection of described terminal is switched to described first address.
The embodiment of the invention also discloses a kind of WiMAX Access Network and switch to the device of WiFi Access Network, comprising: the handoff request receiving element is used for the Access Network handoff request message that receiving terminal sends by the WiMAX Access Network; The connection request transmitting element is used for sending maintenance connection request message to corresponding Data Relay Entity, so that described Data Relay Entity keeps the current business of described terminal to connect.
The embodiment of the invention also discloses a kind of WiMAX Access Network and switch to the device of WiFi Access Network, comprise: the connection request receiving element, be used to receive the maintenance connection request message of injection switching server transmission frequently, described injection switching server frequently is used for sending described maintenance connection request message after the Access Network handoff request message that receives the terminal transmission; Connect holding unit, be used to keep the current business of described terminal to connect; The switching request response unit, be used for to described injection switching server transmission frequently switching response message, so that described injection switching server frequently sends the Access Network switching response message by the WiMAX Access Network to described terminal, described switching response message is used to notify described terminal to switch radio frequency, carries out network insertion by the WiFi Access Network; Switch unit, be used to receive the address binding updating message of the described terminal that described WiFi Access Network sends, the current business connection of described terminal is switched to first address, described first address of the described terminal when comprising described terminal in the described address binding updating message by the access of WiFi Access Network.
The embodiment of the invention also discloses a kind of the support and insert the core network system that switches to the access of WiFi Access Network from the WiMAX Access Network, comprise: the WiMAX Access Network switches to the device of WiFi Access Network, wherein, described WiMAX Access Network switches to the device of WiFi Access Network, is used for:
Receive the Access Network handoff request message of described terminal by sending, keep the current business of described terminal to connect, send the Access Network switching response message by the WiMAX Access Network to described terminal, described Access Network switching response message is used to notify described terminal to switch radio frequency, carries out network insertion by the WiFi Access Network; And
Receive the address binding updating message of the described terminal that described WiFi Access Network sends, the current business of described terminal is connected switch to first address; Described first address of the described terminal when comprising described terminal in the described address binding updating message by the access of WiFi Access Network.
The embodiment of the invention also discloses a kind of terminal equipment, it is characterized in that, comprising: the handoff request transmitting element is used for sending Access Network handoff request message by the WiMAX Access Network to the WiMAX core net; The handoff response receiving element is used to receive the Access Network switching response message that described WiMAX core net sends; Switch unit is used for switching radio frequency after described handoff response receiving element receives described Access Network switching response message, carries out network insertion by the WiFi Access Network.
As can be seen from the above-described embodiment, when the WiMAX Access Network when the WiFi Access Network switches, keep the current business of described terminal to connect, guaranteed not to interrupt terminal and being connected of business network foundation, and after switching is finished, the user need not to do again operations such as access network, has realized the business continuance under injection frequency pattern.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 switches to the flow chart of an embodiment of the method for WiFi Access Network for a kind of WiMAX Access Network of the present invention;
Fig. 2 switches to the signaling process figure of another embodiment of the method for WiFi Access Network for a kind of WiMAX Access Network of the present invention;
Fig. 3 is WiMAX Access Network and the mutual network architecture schematic diagram of WiFi Access Network among the present invention;
Signaling process figure when Fig. 4 is WiMAX Access Network and WiFi Access Network handoff failure;
Fig. 5 switches to the structure chart of an embodiment of the device of WiFi Access Network for a kind of WiMAX Access Network of the present invention;
Fig. 6 switches to the structure chart of another embodiment of the device of WiFi Access Network for a kind of WiMAX Access Network of the present invention;
Fig. 7 switches to the structure chart of an embodiment of the core network system of WiFi Access Network for a kind of WiMAX of support Access Network of the present invention;
Fig. 8 is the structure chart of an embodiment of a kind of terminal equipment of the present invention.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the embodiment of the invention is described in detail below in conjunction with accompanying drawing.
Embodiment one
See also Fig. 1, it is the flow chart of an embodiment of the method for a kind of access network switching of the present invention, and this method may further comprise the steps:
Step 101: the Access Network handoff request message that receiving terminal sends by the WiMAX Access Network;
Step 102: keep the current business of described terminal to connect in the WiMAX core net;
Step 103: send the Access Network switching response message by the WiMAX Access Network to described terminal,, carry out network insertion by the WiFi Access Network so that described terminal is switched radio frequency.
Step 104: receive the address binding updating message of the described terminal of described WiFi Access Network transmission, first address of the described terminal when comprising described terminal in the described address binding updating message by the access of WiFi Access Network;
Step 105: the current business connection of described terminal is switched to described first address.
By the foregoing description as can be seen, when the WiMAX Access Network when the WiFi Access Network switches, the connection that keeps described terminal current business, guaranteed not to interrupt terminal and being connected of business network foundation, and after switching is finished, the user need not to do again operations such as access network, has realized the business continuance under injection frequency pattern.
In one embodiment of the invention, after the Access Network handoff request message that receiving terminal sends by the WiMAX Access Network, can also comprise: send connection according to the Data Relay Entity of described Access Network handoff request message in the WiMAX core net and keep request message, after the current business that keeps terminal connects, receive the connection maintenance response message that described Data Relay Entity sends;
Then, describedly keep the current business of described terminal to connect in the WiMAX core net being specially:
Described Data Relay Entity keeps request message to keep the current business of described terminal to connect according to described connection;
The address binding updating message of the described terminal that the described WiFi Access Network of described reception sends is specially:
Described Data Relay Entity receives the described address binding updating message of the described terminal of described WiFi Access Network transmission;
Described current business connection with described terminal switches to described first address and is specially:
Described Data Relay Entity switches to described first address with the current business connection of described terminal.
Described Data Relay Entity can be the data forwarding node of Correspondent Node to the data path of this terminal of this terminal in any one WiMAX core net, for example ownership place home agent or visit ground home agent or core router.
In this embodiment, when terminal is switched and the terminal core net functional entity that carries out direct communication separate with Data Relay Entity, make terminal when needs switch, can only need core net functional entity communication with this direct communication, make it and being more prone to alternately of core net, simple.
In one embodiment of the invention, described method can further include: when receiving after described terminal finishes switching that Access Network switches the back transmission and finish notification message, send the release resource request message to described WiMAX Access Network, so that described WiMAX Access Network discharges the resource relevant with described terminal.
In this embodiment, the WiMAX Access Network can discharge the relevant resource of terminal after switching is finished, saved Internet resources.
In one embodiment of the invention, described method can further include: before the business connection that described terminal is current switched to described first address, the communication opposite end of the described terminal of buffer memory sent to the data of described terminal, obtains data cached;
Business that described terminal is current connect switch to described first address after, data cachedly send to described terminal with described by described first address.
In this embodiment, switch in the process carry out in terminal and since buffer memory Correspondent Node send to the data of terminal, and after switching is finished, resend to terminal data cached, guaranteed the continuity of the business datum of terminal in handoff procedure.
Embodiment two
See also Fig. 2, it is the signaling process figure of another embodiment of the method for a kind of access network switching of the present invention, the reciprocal process of each control signaling when present embodiment switches to the WiFi Access Network for the WiMAX Access Network, and this method specifically may further comprise the steps:
Step 201: when terminal is determined to need to switch, send Access Network handoff request message to the injection frequency switching server that is arranged in the WiMAX core net by the WiMAX Access Network;
Wherein, terminal can automatically determine to switch to the WiFi network when finding the WiMAX dtr signal, and also can operate and determine to switch to the WiMAX network by the user, can also be need to determine to switch by network side, send Access Network handoff request message by terminal again, request beginning handoff procedure.
Described Access Network handoff request at first is sent to the WiMAX base station of the current connection of terminal, is transmitted to injection switching server frequently by the WiMAX base station.
Step 202: after injection frequency switching server is received Access Network handoff request message, send the current business connection that keeps connection request message, request msg Delivery Function to keep terminal to Data Relay Entity;
Wherein, described Data Relay Entity can be ownership place home agent or visit ground home agent or WiMAX core router as the case may be.Application for roaming, can use mobile IP protocol, when using mobile IP protocol, can have an ownership place home agent or visit ground home agent in the WiMAX core net of the home network of terminal or access zone network, ownership place home agent or visit ground home agent are arranged in consolidated network with injection frequency switching server.For non-roaming application, support the bimodulus that does not exceed terminal attaching ground to switch, may not use mobile IP protocol this moment, and therefore just irrelevant with home agent, described maintenance connection request message just can send to the WiMAX core router of WiMAX normalized definition.
Need to prove that this injection switching server frequently can be physically independent entity, also can be entity in logic, this injection server switching server itself frequently just can be present among the Data Relay Entity, and at this moment, this step can be omitted.
Step 203: after Data Relay Entity is received and is kept connection request message, the connection that keeps the current business of described terminal, and to injection switching server transmission frequently maintenance connection response message;
Wherein, according to the practical application of terminal, for some can not dropping packets processing, Data Relay Entity can be during keeping connecting for terminal, temporary cache sends to the data message of described terminal.
Under the situation among this injection frequency server switching server itself just can be present in Data Relay Entity, this step is: the Access Network handoff request message that Data Relay Entity sends by the WiMAX Access Network according to terminal, the connection that keeps the related service of described terminal.
Step 204: injection frequency switching server sends the Access Network switching response message by the WiMAX Access Network to terminal after receiving and keeping connection response message;
Under the situation among this injection frequency server switching server itself just can be present in Data Relay Entity, this step is: Data Relay Entity sends the Access Network switching response message by the WiMAX Access Network to terminal.
Step 205: terminal is closed the WiMAX radio frequency according to the Access Network switching response message, opens the WiFi radio frequency;
Wherein, the described terminal of present embodiment is a dual-mode terminal, and it has two radio circuits, when connecting the WiMAX Access Network, use the WiMAX radio frequency, use the WiFi radio frequency when connecting the WiFi Access Network, WiFi uses different operating frequencies with WiMAX, and air protocol is different.Carrying out the WiMAX Access Network when switching to the WiFi Access Network, need close the WiMAX radio frequency, and open the WiFi radio frequency.Under the situation that circuit allows, terminal also can be opened the WiFi radio frequency in advance and only do to receive and do not launch, thereby can shift to an earlier date drive sweep WiFi access point, the quickening handoff procedure.
Step 206: after terminal is opened the WiFi radio frequency, the WiFi module of terminal scanning WiFi access point;
Wherein, the WiFi module of terminal can scan the WiFi access point passive or on one's own initiative.When the WiFi of terminal module drive sweep WiFi access point, terminal does not outwards send message, but monitor the beacon frame that the WiFi access point periodically sends, when hearing beacon frame, the WiFi access point is arranged near the expression, and terminal can obtain necessary information from beacon frame, for example, and the business network information that can insert by this WiFi access point etc.When the WiMAX of terminal radio frequency is closed, the WiFi module of terminal adopts the mode of active scan to search the WiFi access point, at this moment, terminal is initiatively sent probe request, and in probe request, add certain overanxious condition, after the WiFi access point is received probe request, if meet the filtercondition in the explore frame, just send probing response frame to this terminal, terminal is behind the probing response frame that receives the transmission of WiFi access point, just show and found a qualified WiFi access point, and further from probing response frame, obtain the ability of this WiFi access point, but the information of access business network etc.At last, terminal is selected access point that can insert the current WiMAX core net of using from a plurality of WiFi access points that scan, and does follow-up connection work.
Step 207: terminal has been selected after the WiFi access point, just is associated with this WiFi access point, and starts verification process;
Wherein, in verification process, authenticator in the WiFi access network can be to terminal request user's sign, and the user ID that terminal sends is forwarded to certificate server in the WiMAX core net, promptly whether aaa server exists this user ID by the aaa server inspection, check promptly whether the user registers, if the user registers, then continue checking user's the true and false, the authenticator in the WiFi access network is transmitted authentication message therein.After authentication is finished; the master session key that aaa server and terminal negotiation make new advances; authenticator also and terminal utilize master session key to negotiate master key between the paired equipment; terminal just can formally be linked into the WiFi Access Network afterwards, and utilizes communicating by letter between session key protection terminal that the master key between the paired equipment derives from and the access point.
Step 208: after terminal is finished verification process, obtain the IP address to address allocation server;
Wherein, described IP address can be passed through DHCP (DHCP) agreement and obtains.There is a DHCP proxy in the WiFi Access Network, helps the IP address assignment server of terminal from the WiMAX core network to obtain the IP address.DHCP proxy can still use the DHCP agreement to obtain the IP address from the WiMAX core net, and exist a Dynamic Host Configuration Protocol server in the WiMAX core net this moment.In addition, DHCP proxy also can use other address assignment agreement, mobile IP protocol for example, and the aaa server in the WiMAX network obtains the IP address.Also can use DHCP relay rather than DHCP proxy in the WiFi Access Network, DHCP relay is forwarded to Dynamic Host Configuration Protocol server in the WiMAX core net with the dhcp message of terminal simply, and the dhcp message of dhcp server response is forwarded to terminal.Terminal also can directly be used mobile IP protocol, like this, an external agent is arranged in the WiFi Access Network, and the message of terminal request IP address can send to described external agent.
Need to prove, described WiFi access network technology is a clear and definite network standard not, and wherein do not comprise said external agent, when WiMAX Forum is linked into the WiMAX core net in consideration with the WiFi Access Network, may in the WiMAX core net, add an adaptation module, and be thought of as and make the WiFi network support move IP, the foreign agent functionality of WiFi network is set in this adaptation module, like this, the external agent of WiFi network is positioned at the WiMAX core net physically, but logically, the external agent that we will the WiFi network sums up in the point that in the WiFi Access Network.
When network side use mobile IP protocol, actual allocated comprises for the address of terminal in the above-mentioned address allocation procedure: the home address of terminal and Care-of Address.Home address is generally constant, and Care-of Address is directly issued terminal when terminal is used mobile IP protocol, also be the employed address of terminal.When terminal is used the DHCP agreement, only in Access Network sidelights record, and directly do not send to terminal, terminal is not known the existence of this address.
Need to prove, when terminal is used the DHCP agreement, the WiFi Access Network can also have other mode to give terminal distribution IP address, for example WiFi Access Network self can be private net address of terminal distribution, obtain a public network address or only use own external public network address from the WiMAX core net then, then the message that comes self terminal or mail to terminal is done NAT/NAPT (network address and port translation) conversion.
Step 209: the new mobile IP Care-of Address that will obtain sends to Data Relay Entity by the address binding updating message.
Wherein, when network use be mobile IP protocol the time, the address binding updating message can send to home agent by mobile IP external agent, after the local agency received new mobile IP Care-of Address, home agent just can send to new mobile IP Care-of Address with tunnel style with the message that should send to terminal.Usually comprise subscriber identity information, constant mobile IP ownership place address and the new Care-of Address of terminal in the address binding updating message.Specifically, how home agent is updated to new Care-of Address not within the scope of the present invention with the Care-of Address of described terminal, and those skilled in the art can be with reference to the description in the mobile IP protocol.
If network does not use mobile IP protocol, this address binding updating message can send to core router in the WiMAX core network by DHCP proxy/relaying, comprising user ID and terminal new can overall route the IP address.
Need to prove, DHCP proxy/relaying in the WiFi Access Network or external agent can occur in the process of address assignment to the process that home agent or WiMAX core router send the address binding updating message, also can occur in after address assignment finishes.
Also need to prove, if network does not use mobile IP protocol, the address of terminal may change before and after switching, then the Correspondent Node of described terminal need be known the address that described terminal is new, switch to the new address of described terminal with the connection of this terminal that will keep, this can be by more high-rise Signaling Layer realization, not within the scope of the present invention.
Step 210: Data Relay Entity is after receiving address binding message, and the message that will send to this terminal according to the new IP Care-of Address in the binding message of address sends to new Care-of Address;
Wherein, after the local agency received new mobile IP Care-of Address, home agent just can send to new mobile IP Care-of Address with tunnel style with the message that should send to terminal;
After the core router in the WiMAX core network received the IP address of the overall route that comprises that user ID and terminal are new, the message that should be sent to terminal by the WiMAX core router sent to new destination address.
Step 211: after distribute to finish the address, terminal can receive DHCP proxy/relaying or mobile IP external agent and finish replying of address assignment by what AP returned, and terminal is replied according to this;
Step 212: the message that sends the handoff procedure end frequently of an injection by the switching server of WiFi Access Network in the WiMAX core net;
Wherein, if the terminal use is the DHCP agreement, when end was distributed in the address, terminal can be received a DHCP response message, if the terminal use is mobile IP protocol, when end was distributed in the address, terminal can be received a mobile IP response message.At this moment, terminal sends the message of injection handoff procedure end frequently by the switching server of WiFi Access Network in the WiMAX core net.
When injection frequency switching server was arranged in Data Relay Entity, this step was: terminal sends the message of injection handoff procedure end frequently by the Data Relay Entity of WiFi Access Network in the WiMAX core net.
Step 213: after injection frequency switching server is received the message of finishing switching, send a message to discharge the resource relevant with this terminal to the original WiMAX Access Network of terminal.
Wherein, generally comprise user ID and/or terminal in this message and move IP ownership place address, the WiMAX Access Network can discharge the terminal related resource in view of the above.
When injection frequency switching server was arranged in Data Relay Entity, this step was: Data Relay Entity sends a message to discharge the resource relevant with this terminal to former WIMAX Access Network.
By above process, terminal has just been finished the process that switches to the WiFi Access Network from the WiMAX Access Network.See also Fig. 3, it is WiMAX and the mutual network architecture schematic diagram of WiFi among the present invention.Wherein, the data path that curve 1 is a dual-mode terminal when the WiMAX Access Network is connected to the WiMAX core net, being terminal receives the WiMAX base station by IEEE 802.16 technical battery of eating dishes without rice or wine, pass the WiMAX Access Network, be connected to the WiMAX core net from the Access Network router, be connected to the Internet or other business network by core router again; Curve 2 expression terminals are connected to the data path of WiMAX core net from the WiFi Access Network, to be terminal connect by IEEE 802.11 technology of eating dishes without rice or wine is access point in the WiFi access network, up outlet through WiFi is connected to the WiMAX core net, is connected to the Internet or other business network through the core router in the WiMAX core net again.
Wherein, need to prove, do not represent the connection between any entity in the described network architecture of Fig. 3, actual these entities can be among the same equipment physically, also can be positioned among the different equipment, in the time of in being in different physical equipments, in fact they constitute a network, adopts the network communications technology to link together.
In addition, if in step 206, terminal is found to find available WiFi access point, perhaps in step 207, the authentification failure of terminal and aaa server, perhaps in step 208, the address allocation procedure failure, terminal can switch back to the WiMAX Access Network, because this moment, the resource relevant with this terminal in the WiMAX access network still kept, be not released, terminal only need send a message to switching server and represent to cancel handoff procedure, and switching server sends a message to recover previous connection to home agent or core router then, and then terminal just can continue to use by former WiMAX Access Network professional, see also Fig. 4, the signaling process figure when it is failed for switch to the WiFi Access Network from the WiMAX Access Network.
By the foregoing description as can be seen, when the WiMAX Access Network when the WiFi Access Network switches, the connection that keeps described terminal current business, and may temporary cache send to the data message of described terminal according to practical application, guaranteed not to interrupt terminal and being connected of business network foundation, and after switching was finished, the user need not to do again operations such as access network, had realized the business continuance under injection frequency pattern.
In addition, when terminal is switched and the terminal core net functional entity that carries out direct communication separate with Data Relay Entity, make terminal when needs switch, can only need core net functional entity communication with this direct communication, make it and being more prone to alternately of core net, simple.Switch in the process carry out in terminal and since buffer memory Correspondent Node send to the data of terminal, and after switching is finished, resend to terminal, thereby also guaranteed the continuity of the business datum of terminal in handoff procedure data cached.
Embodiment three
Corresponding with the method that above-mentioned a kind of WiMAX Access Network switches to the WiFi Access Network, the embodiment of the invention also provides a kind of WiMAX Access Network to switch to the device of WiFi Access Network.See also Fig. 5, it is the example structure figure that a kind of WiMAX Access Network of the present invention switches to the device of WiFi Access Network, and this device comprises: handoff request receiving element 501 and connection request transmitting element 502.Operation principle below in conjunction with this device is further introduced its internal structure and annexation.
Handoff request receiving element 501 is used for the Access Network handoff request message that receiving terminal sends by the WiMAX Access Network;
The connection request transmitting element is used for sending maintenance connection request message to corresponding Data Relay Entity, so that described Data Relay Entity keeps the current business of described terminal to connect.
Wherein, described Data Relay Entity can be the data forwarding node of Correspondent Node to the data path of this terminal of this terminal in any one WiMAX core net, for example ownership place home agent or visit ground home agent or core router.
Embodiment four
Corresponding with the method that above-mentioned a kind of WiMAX Access Network switches to the WiFi Access Network, the embodiment of the invention also provides a kind of WiMAX Access Network to switch to the device of WiFi Access Network.See also Fig. 6, it is another example structure figure that a kind of WiMAX Access Network of the present invention switches to the device of WiFi Access Network, and this device comprises: connection request receiving element 601, connection holding unit 602, switching request response unit 603 and switch unit 604.Operation principle below in conjunction with this device is further introduced its internal structure and annexation.
Connection request receiving element 601 is used to receive the maintenance connection request message that injection frequency switching server sends, and described injection switching server frequently is used for sending described maintenance connection request message after the Access Network handoff request message that receives the terminal transmission;
Connect holding unit 602, be used to keep the current business of described terminal to connect;
Switching request response unit 603, be used for to described injection switching server transmission frequently switching response message, so that described injection switching server frequently sends the Access Network switching response message by the WiMAX Access Network to described terminal, described switching response message is used to notify described terminal to switch radio frequency, carries out network insertion by the WiFi Access Network;
By the foregoing description as can be seen, when the WiMAX Access Network when the WiFi Access Network switches, the connection that keeps described terminal current business, guaranteed not to interrupt terminal and being connected of business network foundation, and after switching is finished, the user need not to do again operations such as access network, has realized the business continuance under injection frequency pattern.
In addition, this device can further include: resource releasing unit 605, be used for when receiving after described terminal finishes switching that Access Network switches the back transmission and finish notification message, send the release resource request message to described WiMAX Access Network, so that described WiMAX Access Network discharges the resource relevant with described terminal.
In this embodiment, the WiMAX Access Network can discharge the relevant resource of terminal after switching is finished, saved Internet resources.
This device can further include:
Transmitting element 607, be used for business that described terminal is current connect switch to described first address after, data cachedly send to described terminal with described by described first address.
In this embodiment, switch in the process carry out in terminal and since buffer memory Correspondent Node send to the data of terminal, and after switching is finished, resend to terminal data cached, guaranteed the continuity of the business datum of terminal in handoff procedure.
Embodiment five
The embodiment of the invention also provides a kind of the support to insert the core network system that switches to the access of WiFi Access Network from the WiMAX Access Network, see also Fig. 7, it supports to insert from the WiMAX Access Network structure chart of an embodiment of the core network system that switches to the access of WiFi Access Network for the present invention is a kind of, described system comprises: the WiMAX Access Network switches to the device 701 of WiFi Access Network, wherein
Described WiMAX Access Network switches to the device of WiFi Access Network, is used for:
Receive the Access Network handoff request message of described terminal by sending, keep the current business of described terminal to connect, send the Access Network switching response message by the WiMAX Access Network to described terminal, described Access Network switching response message is used to notify described terminal to switch radio frequency, carries out network insertion by the WiFi Access Network; And
Receive the address binding updating message of the described terminal that described WiFi Access Network sends, the current business of described terminal is connected switch to first address; Described first address of the described terminal when comprising described terminal in the described address binding updating message by the access of WiFi Access Network.
Wherein, WiMAX core net 701 comprises: injection is switching server 7011 and Data Relay Entity 7012 frequently, wherein,
Injection is switching server 7011 frequently, be used for behind the described Access Network request message that receives described terminal transmission, send maintenance data connection request message, after receiving the maintenance connection response message, send described Access Network switching response message to described terminal by the WiMAX Access Network;
Data Relay Entity 7012, be used for after receiving the described injection maintenance data connection request message that switching server sends frequently, keep the current business of described terminal to connect according to described maintenance connection request message, send described maintenance connection response message to described injection frequency switching server, receive the address binding updating message of the described terminal that described WiFi Access Network sends, the current business of described terminal is connected switch to described first address.
Data Relay Entity can be the data forwarding node of Correspondent Node to the data path of this terminal of this terminal in any one WiMAX core net, for example ownership place home agent or visit ground home agent or core router.In addition, injection frequently switching server 6021 also is used for: when receiving after switching that described terminal sends by the WiFi Access Network finishes notification message, send the release resource request message to described WiMAX Access Network, so that described WiMAX Access Network discharges the resource relevant with described terminal.
Data Relay Entity 6022 also is used for: be used for after receiving the described injection maintenance data connection request message that switching server sends frequently, keep the current business of described terminal to connect according to described maintenance connection request message, send described maintenance connection response message to described injection frequency switching server, receive the address binding updating message of the described terminal that described WiFi Access Network sends, the current business of described terminal is connected switch to described first address.
Embodiment six
The embodiment of the invention also provides a kind of terminal equipment, sees also Fig. 8, and it is the structure chart of an embodiment of a kind of terminal equipment of the present invention, and described system comprises: handoff request transmitting element 801, handoff response receiving element 802 and switch unit 803, wherein,
Handoff request transmitting element 801 is used for sending Access Network handoff request message by the WiMAX Access Network to the WiMAX core net;
Handoff response receiving element 802 is used to receive the Access Network switching response message that described WiMAX core net sends;
Described terminal equipment can further include: switch and finish notification unit 804, be used for sending handoff completion message to described WiMAX core net after the Access Network switching is finished.
By above embodiment as can be seen, when the WiMAX Access Network when the WiFi Access Network switches, the connection that keeps described terminal current business, and may temporary cache send to the data message of described terminal according to practical application, guaranteed not to interrupt terminal and being connected of business network foundation, and after switching was finished, the user need not to do again operations such as access network, had realized the business continuance under injection frequency pattern.
Need to prove, one of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method, be to instruct relevant hardware to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
More than a kind of WiMAX Access Network provided by the present invention is switched to the WiFi Access Network method and relevant device be described in detail, used specific embodiment herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (17)
1. a micro-wave access global inter communication WiMAX Access Network switches to the method for Wireless Fidelity WiFi Access Network, it is characterized in that, comprising:
The Access Network handoff request message that receiving terminal sends by the WiMAX Access Network;
Keep the current business of described terminal to connect in the WiMAX core net;
Send the Access Network switching response message by the WiMAX Access Network to described terminal,, carry out network insertion by the WiFi Access Network so that described terminal is switched radio frequency;
Receive the address binding updating message of the described terminal of described WiFi Access Network transmission, first address of the described terminal when comprising described terminal in the described address binding updating message by the access of WiFi Access Network;
The current business connection of described terminal is switched to described first address.
2. method according to claim 1 is characterized in that, described method also comprises:
After the Access Network handoff request message that receiving terminal sends by the WiMAX Access Network, send connection according to the Data Relay Entity of described Access Network handoff request message in the WiMAX core net and keep request message;
After the current business of described maintenance terminal connects, receive the connection maintenance response message that described Data Relay Entity sends;
Describedly keep the current business of described terminal to connect in the WiMAX core net being specially:
Described Data Relay Entity keeps request message to keep the current business of described terminal to connect according to described connection;
Describedly send the Access Network switching response message by the WiMAX Access Network to described terminal and be specially:
Keep response message according to described connection, send described Access Network switching response message to described terminal by the WiMAX Access Network;
The address binding updating message of the described terminal that the described WiFi Access Network of described reception sends is specially:
Described Data Relay Entity receives the described address binding updating message of the described terminal of described WiFi Access Network transmission;
Described current business connection with described terminal switches to described first address and is specially:
Described Data Relay Entity switches to described first address with the current business connection of described terminal.
3. method according to claim 2 is characterized in that, described Data Relay Entity is:
Ownership place home agent or visit ground home agent or core router.
4. method according to claim 1 and 2 is characterized in that, described method also comprises:
Finish Access Network and switch after switching that the back sends finishes notification message when receiving described terminal, send to described WiMAX Access Network and discharge resource request message, so that the described WiMAX Access Network release resource relevant with described terminal.
5. method according to claim 1 and 2 is characterized in that, described method also comprises:
Before the business connection that described terminal is current switched to described first address, the communication opposite end of the described terminal of buffer memory sent to the data of described terminal, obtains data cached;
Business that described terminal is current connect switch to described first address after, data cachedly send to described terminal with described by described first address.
6. a WiMAX Access Network switches to the device of WiFi Access Network, it is characterized in that, comprising:
The handoff request receiving element is used for the Access Network handoff request message that receiving terminal sends by the WiMAX Access Network;
The connection request transmitting element is used for sending maintenance connection request message to corresponding Data Relay Entity, so that described Data Relay Entity keeps the current business of described terminal to connect.
7. device according to claim 6 is characterized in that, described Data Relay Entity is:
Ownership place home agent or visit ground home agent or core router.
8. a WiMAX Access Network switches to the device of WiFi Access Network, it is characterized in that, comprising:
The connection request receiving element is used to receive the maintenance connection request message that injection frequency switching server sends, and described injection switching server frequently is used for sending described maintenance connection request message after the Access Network handoff request message that receives the terminal transmission;
Connect holding unit, be used to keep the current business of described terminal to connect;
The switching request response unit, be used for to described injection switching server transmission frequently switching response message, so that described injection switching server frequently sends the Access Network switching response message by the WiMAX Access Network to described terminal, described switching response message is used to notify described terminal to switch radio frequency, carries out network insertion by the WiFi Access Network;
Switch unit, be used to receive the address binding updating message of the described terminal that described WiFi Access Network sends, the current business connection of described terminal is switched to first address, described first address of the described terminal when comprising described terminal in the described address binding updating message by the access of WiFi Access Network.
9. device according to claim 8 is characterized in that, described device also comprises:
The resource releasing unit is used for finishing Access Network and switching after switching that the back sends finishes notification message when receiving described terminal, sends to described WiMAX Access Network to discharge resource request message, so that the described WiMAX Access Network release resource relevant with described terminal.
10. device according to claim 8 is characterized in that, described device also comprises:
Buffer unit, be used for before the business connection that described terminal is current switches to described first address, receive the data that described terminal related service network sends to described terminal, the communication opposite end of the described terminal of buffer memory sends to the data of described terminal, obtains data cached;
Transmitting element, be used for business that described terminal is current connect switch to described first address after, data cachedly send to described terminal with described by described first address.
11. a support inserts from the WiMAX Access Network and switches to the core network system that the WiFi Access Network inserts, and it is characterized in that comprise: the WiMAX Access Network switches to the device of WiFi Access Network, wherein,
Described WiMAX Access Network switches to the device of WiFi Access Network, is used for:
Receive the Access Network handoff request message of described terminal by sending, keep the current business of described terminal to connect, send the Access Network switching response message by the WiMAX Access Network to described terminal, described Access Network switching response message is used to notify described terminal to switch radio frequency, carries out network insertion by the WiFi Access Network; And
Receive the address binding updating message of the described terminal that described WiFi Access Network sends, the current business of described terminal is connected switch to first address; Described first address of the described terminal when comprising described terminal in the described address binding updating message by the access of WiFi Access Network.
12. system according to claim 11 is characterized in that, the device that described WiMAX Access Network switches to the WiFi Access Network comprises:
Injection is switching server frequently, be used for behind the described Access Network request message that receives described terminal transmission, send maintenance data connection request message, after receiving the maintenance connection response message, send described Access Network switching response message to described terminal by the WiMAX Access Network;
Data Relay Entity, be used for after receiving the described injection maintenance data connection request message that switching server sends frequently, keep the current business of described terminal to connect according to described maintenance connection request message, send described maintenance connection response message to described injection frequency switching server, receive the address binding updating message of the described terminal that described WiFi Access Network sends, the current business of described terminal is connected switch to described first address.
13. system according to claim 12 is characterized in that, described injection switching server frequently also is used for:
When receiving after switching that described terminal sends by the WiFi Access Network finishes notification message, send to described WiMAX Access Network and discharge resource request message, so that described WiMAX Access Network discharges the resource relevant with described terminal.
14. system according to claim 12 is characterized in that, described Data Relay Entity also is used for:
Before the business connection that described terminal is current switched to described first address, the communication opposite end of the described terminal of buffer memory sent to the data of described terminal, obtains data cached;
Business that described terminal is current connect switch to described first address after, data cachedly send to described terminal with described by described first address.
15., it is characterized in that described Data Relay Entity is: ownership place home agent or visit ground home agent or core router according to claim 12 or 14 described systems.
16. a terminal equipment is characterized in that, comprising:
The handoff request transmitting element is used for sending Access Network handoff request message by the WiMAX Access Network to the WiMAX core net;
The handoff response receiving element is used to receive the Access Network switching response message that described WiMAX core net sends;
Switch unit is used for switching radio frequency after described handoff response receiving element receives described Access Network switching response message, carries out network insertion by the WiFi Access Network.
17. terminal equipment according to claim 16 is characterized in that, also comprises:
Switch and finish notification unit, be used for after the Access Network switching is finished, sending handoff completion message to described WiMAX core net.
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