CN102892157B - WLAN keeps the method and system of continuation when switching to WLAN or 3G - Google Patents
WLAN keeps the method and system of continuation when switching to WLAN or 3G Download PDFInfo
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- CN102892157B CN102892157B CN201210351721.8A CN201210351721A CN102892157B CN 102892157 B CN102892157 B CN 102892157B CN 201210351721 A CN201210351721 A CN 201210351721A CN 102892157 B CN102892157 B CN 102892157B
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Abstract
The method and system of continuation are kept when switching the invention discloses WLAN to WLAN or 3G, including：Gateway device goes association messages to judge to go to associate reason according to what the access point first port received was sent；The gateway device detects whether to receive the connection request message of WLAN terminal transmission before timing terminates；When association request message of the connection request message between the WLAN terminal and access point second port, the PDP IP address used during the last association that then gateway device will carry in the PDP Context distributes to the WLAN terminal, carries out network switching；When the connection request message is the PDP context activation request message that 3G business is established in request, then the gateway device feedback PDP context activation response message, carries out network switching.The present invention need not increase new network element, the continuation of business when realizing switching between network, save device upgrade expense.
Description
Technical field
The present invention relates to wireless network handoff technique field, more particularly to WLAN keeps continuation when switching to WLAN or 3G
Method and system.
Background technology
Home gateway（HGW）The hinge that to be home network contact with telecommunication carrier networks with intercommunication.It is household internal
Each terminal of network provides the means of networking, while is responsible for each subnet of public network and network（PC, phone, household electrical appliances, illumination
Deng）Intercommunication and remote control, and user obtains the passage of various value-added services from communication network and internet.
With the popularization of intelligent terminal, traditional 3G network is faced with unprecedented challenge.And WLAN technologies are as one
The flexible wide-band wireless IP access way of kind, high by its access rate, framework is easy to use, the characteristics such as system cost is cheap,
The clearly accreditation of industry is obtained.And compared with WLAN high speed developments, the comprehensive commercializations of 3G are but more slow；Therefore, melt
The demand of conjunction is also just obvious all the more.
WLAN solves the problems, such as bandwidth at present, but not can solve the problem that the problem of mobile, and user can in hot spot region
Use WLAN high speed access internet；And traditional 3G realizes mobility on the contrary, traditional 3G make use of existing network to cover,
It is but many compared with difference for WLAN in terms of bandwidth.Therefore, WLAN has complementary advantages with 3G network, will turn into becoming greatly for future development
Gesture.
But face current such case, it would be desirable to realize that WLAN is accessed to WLAN or 3G access switchings, and
The stability of business is must assure that in handoff procedure.
In the prior art, keep needing to increase new net in the technical scheme of the sustainability of business when between network switching
Member, realization is complicated, and device upgrade is costly.
The content of the invention
The method and system of continuation are kept when switching the invention provides WLAN to WLAN or 3G, without increasing new net
Member, the continuation of business when ensure that switching between network, saves device upgrade expense, lifts Consumer's Experience.
The method for keeping continuation when switching the invention provides WLAN to WLAN or 3G, this method include：
Gateway device goes association messages to judge to go to associate reason according to what the access point first port received was sent, if
It is normally to go to associate, then discharges all resources, otherwise start timing；
The gateway device detects whether to receive the connection request message of WLAN terminal transmission before timing terminates, if not having
Receive the connection request message and then discharge packet data protocol PDP Context, otherwise judge the connection request message
Type, and stop timing；
When association request message of the connection request message between the WLAN terminal and access point second port, then
The PDP IP address used during the last association that the gateway device will carry in the PDP Context distributes to the WLAN
Terminal, carry out network switching；
When the connection request message is the PDP context activation request message that 3G business is established in request, then the net
Equipment feedback PDP context activation response message is closed, network switching is carried out, wherein in the PDP context activation response message
Carry the PDP IP addresses safeguarded during last association.
Wherein, network insertion point identifier is carried in the PDP context activation request message.
Wherein, the gateway device goes association messages to judge to go to associate according to what the access point first port received was sent
Before reason, in addition to：Safeguard and preserve the PDP IP addresses that WLAN terminal is distributed in this secondary association and last PDP
The mapping relations carried between network insertion point identifier and RAB ID in Context activation request message.
Wherein, before the transmission PDP context activation response message, in addition to：
Establish in this described PDP context activation request message and carry network insertion point identifier and the wireless access
Carry ID mapping relations；
Carrying network insertion point identifier and the wireless access in last PDP context activation request message
The mapping relations between ID are carried, search last PDP Context.
Wherein, methods described also includes：Conversion of the gateway device to whole signalings between wlan network and 3G network,
And 3GPP and the protocol data forms of IEEE 802.11 mutual conversion.
The system for keeping continuation when switching the invention provides WLAN to WLAN or 3G, including：
Gateway device, association messages are gone to judge to go association former for what is sent according to the access point first port received
Cause, if normally going to associate, then all resources are discharged, otherwise start timing；Detect whether to receive before timing terminates
The connection request message that WLAN terminal is sent, discharge grouped data if the connection request message of the terminal transmission is not received
Protocol PDP context, otherwise judges the type for the connection request message that the terminal received is sent, and stops timing；When
Association request message of the connection request message between the WLAN terminal and access point second port, the gateway device
The PDP IP address that last time for that will be carried in the PDP Context uses when associating distributes to the WLAN terminal, enters
Row network switching；If the connection request message is the PDP context activation request message that 3G business is established in request, the net
Close equipment to be used to feed back PDP context activation response message, carry out network switching, wherein PDP context activation response disappears
The PDP IP addresses safeguarded when carrying last association in breath.
Terminal, the connection request message for transmission receive the PDP distributed when associating again to the gateway device
IP address.
Access point, for the data transfer between terminal and the gateway device, it is additionally operable to send and goes to associate with terminal
Message is to the gateway device；
Home eNodeB, for establishing RAB.
Wherein, the gateway device, including：
Receiving module, receive the transmission of access point first port removes association messages；
Sending module, when the connection request message is terminal and access point second port association request message, for will
The PDP IP address used during the first secondary association carried in packet data protocol PDP Context is sent to the terminal；Work as institute
The PDP context activation request message that connection request message is established in request for 3G business is stated, for sending PDP context activation
Response message, the PDP IP addresses safeguarded when carrying the first secondary association in the PDP context activation response message；Distribution institute
The PDP IP address safeguarded during the first secondary association is stated to terminal.
WLAN Access Control module, for judging to go to associate reason, if normally going to associate, then release is all
Resource, otherwise start timing；It is additionally operable to detect whether the connection request message for receiving WLAN terminal transmission before timing terminates,
Packet data protocol PDP Context is discharged if the connection request message of the terminal transmission is not received, otherwise judges to receive
The connection request message type that the terminal arrived is sent, and stop timing；
Switching control submodule, carry out network switching；
PDP Context agent sub-module, for safeguarding RAB and its corresponding PDP Context, the PDP of distribution
Between the network insertion point identifier and RAB ID that are carried in IP addresses and PDP context activation request message
Mapping relations.
Wherein, the gateway device, in addition to：
Protocol conversion module, for the conversion to whole signalings between wlan network and 3G network, and 3GPP and IEEE
The mutual conversion of 802.11 protocol data forms.
Compared with prior art, the embodiment of the present invention has advantages below：By having merged wireless office in gateway device
Domain net Access Control, without increasing new network element device, the continuation of business when ensure that switching between network, save device upgrade
Expense, lift Consumer's Experience.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1：It is the flow chart for the method that continuation is kept when WLAN of the present invention switches to WLAN or 3G；
Fig. 2：It is the structure chart for the system that continuation is kept when WLAN of the present invention switches to WLAN or 3G；
Fig. 3：It is the structural representation of gateway device in the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is part of the embodiment of the present invention, rather than whole embodiments.Based on the present invention
In embodiment, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to the scope of protection of the invention.
The method for keeping continuation when WLAN switches to WLAN or 3G is provided in the embodiment of the present invention, as shown in figure 1, bag
Include following steps：
Step S101, gateway device go association messages to judge to go to associate according to what the access point first port received was sent
Reason, if normally going to associate, then step S102 is performed, otherwise perform step S103；
Step S102, discharge all resources；
Step S103, start timing；
Step S104, the gateway device detect whether to receive the connection request of WLAN terminal transmission before timing terminates
Message, step S105 is performed if the connection request message is not received, otherwise perform step S106；
Step S105, discharge packet data protocol PDP Context；
Step S106, judges the type of the connection request message, and stops timing.
When association request message of the connection request message between the WLAN terminal and access point second port, then
Perform step S107；
Step S107, the PDP IP that the last time that the gateway device will carry in the PDP Context uses when associating
The WLAN terminal is distributed in address, carries out network switching；
When the PDP context activation request message that the connection request message is established in request for 3G business, then step is performed
Rapid S108；
Step S108, the gateway device feed back PDP context activation response message, network switching are carried out, wherein described
The PDP IP addresses safeguarded when carrying last association in PDP context activation response message.
Wherein, network insertion point identifier is carried in the PDP context activation request message.
Wherein, the gateway device goes association messages to judge to go to associate according to what the access point first port received was sent
Before reason, in addition to：Safeguard and preserve the PDP IP addresses that WLAN terminal is distributed in this secondary association and last PDP
The mapping relations carried between network insertion point identifier and RAB ID in Context activation request message.
Wherein, before the transmission PDP context activation response message, in addition to：
Establish in this described PDP context activation request message and carry network insertion point identifier and the wireless access
Carry ID mapping relations；
Carrying network insertion point identifier and the wireless access in last PDP context activation request message
The mapping relations between ID are carried, search last PDP Context.
After WLAN terminal accesses AP by the WW mouths of standard, communicated between AP and AC by CAPWAP interfaces.In net
The Central Shanxi Plain increases protocol conversion, for the conversion of WLAN between AC and HGW and 3GPP protocol signalings and data format, after conversion
The IU interface communications that signaling and data pass through standard between HGW and CN.
Methods described also includes：Conversion of the gateway device to whole signalings between wlan network and 3G network, and
3GPP and the protocol data forms of IEEE 802.11 mutual conversion.
In addition, the system for keeping continuation when switching present invention also offers WLAN to WLAN or 3G, as shown in Fig. 2 should
System includes：
Gateway device 101, association messages are gone to judge to go to associate for what is sent according to the access point first port received
Reason, if normally going to associate, then all resources are discharged, otherwise start timing；Detect whether to receive before timing terminates
The connection request message that WLAN terminal is sent, discharge grouped data if the connection request message of the terminal transmission is not received
Protocol PDP context, otherwise judges the type for the connection request message that the terminal received is sent, and stops timing；When
Association request message of the connection request message between the WLAN terminal and access point second port, the gateway device
The PDP IP address that last time for that will be carried in the PDP Context uses when associating distributes to the WLAN terminal, enters
Row network switching；If the connection request message is the PDP context activation request message that 3G business is established in request, the net
Close equipment to be used to feed back PDP context activation response message, carry out network switching, wherein PDP context activation response disappears
The PDP IP addresses safeguarded when carrying last association in breath.
Terminal 102, the connection request message for transmission receive what is distributed when associating again to the gateway device
PDP IP address.
Access point 103, for the data transfer between terminal and the gateway device, it is additionally operable to send and goes to close with terminal
Join message to the gateway device；
Home eNodeB 104, for establishing RAB.
Wherein, the gateway device 101, including：
Receiving module 1011, receive the transmission of access point first port removes association messages；
Sending module 1012, when the connection request message is terminal and access point second port association request message, use
The PDP IP address used when by the first secondary association carried in packet data protocol PDP Context is sent to the terminal；
When the PDP context activation request message that the connection request message is established in request for 3G business, for sending PDP Context
Activate response message, the PDP IP addresses safeguarded when carrying the first secondary association in the PDP context activation response message；Point
The PDP IP address safeguarded during with first secondary association is to terminal.
WLAN Access Control module 1013, for judging to go to associate reason, if normally going to associate, then discharge
All resources, otherwise start timing；It is additionally operable to detect whether the connection request for receiving WLAN terminal transmission before timing terminates
Message, packet data protocol PDP Context is discharged if the connection request message of the terminal transmission is not received, is otherwise judged
The connection request message type that the terminal received is sent, and stop timing；
Switching control submodule 1014, carry out network switching；
PDP Context agent sub-module 1015, for safeguarding RAB and its corresponding PDP Context, distribution
PDP IP addresses and PDP context activation request message in the network insertion point identifier and RAB that carry
Mapping relations between ID.
Wherein, the gateway device 101, in addition to：
Protocol conversion module 1016, for the conversion to whole signalings between wlan network and 3G network, and 3GPP with
The mutual conversion of the protocol data forms of IEEE 802.11.
After WLAN terminal accesses AP by the WW mouths of standard in the technical program, entered between AP and AC by CAPWAP interfaces
Row communication.Increase protocol conversion module in a gateway, for WLAN between AC and HGW and 3GPP protocol signalings and data format
Conversion, the IU interface communications that signaling and data after conversion pass through standard between HGW and CN.
3G network has continuous coverage, and WLAN hot spot is distributed in different places.
Switching between WLAN：When user is moved in another WLAN coverage, because original connection WLAN signal becomes
Difference, user's release are connected with original WLAN, and initiation is connected with another WLAN；Now handled by gateway device, maintain movement
During business continuity；
WLAN and 3G switches：When user moves out HNB WLAN signal coverage, into the 3G signals for only existing HNB
When in coverage, because original connection WLAN signal is deteriorated, user initiates to be connected WLAN releases with original, when detecting 3G signals,
Business is initiated in 3G network and establishes request, now according to the processing of gateway device, maintains the continuous of business in moving process
Property.
The technical program is related to 3 flows altogether：
Need to safeguard the PDP Context relevant information merged during terminal access WLAN AN first, such as：Mixing
RAB ID, PDP Address；
WLAN accesses the flow to WLAN access switchings, needs to remain the IP address one of WLAN terminal distribution before and after switching
Cause, keep the continuation of business；
WLAN accesses the flow to 3G access switchings, needs the IP address for remaining terminal distribution consistent before and after switching, protects
Hold the continuation of business；Meanwhile in above-mentioned flow, after WLAN is disconnected, PDP Context needs to wait a timing time
That is ageing time (aging time), in ageing time, if UE actively initiates data service（By WLAN or pass through
3G）, then the switching of business being carried out, if UE does not initiate data service in ageing time, then it is assumed that and data connection disconnects,
The PDP information that the release of PDP Context agent sub-module is safeguarded.
What the technical scheme of the embodiment of the present invention was brought has the beneficial effect that：By to parallax caused by shooting 3D videos
It is adjusted, 3D videos is reached optimal video effect, avoid people from occurring visual fatigue during viewing.
Through the above description of the embodiments, those skilled in the art can be understood that the present invention can lead to
Hardware realization is crossed, the mode of necessary general hardware platform can also be added by software to realize.Based on such understanding, this hair
Bright technical scheme can be embodied in the form of software product, and the software product can be stored in a non-volatile memories
Medium（Can be CD-ROM, USB flash disk, mobile hard disk etc.）In, including some instructions are causing a computer equipment（Can be
Personal computer, server, or network equipment etc.）Perform the method described in each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, unit or stream in accompanying drawing
Journey is not necessarily implemented necessary to the present invention.
It will be appreciated by those skilled in the art that the unit in embodiment in system can describe to be distributed according to embodiment
In the device of embodiment, respective change can also be carried out and be disposed other than in one or more devices of the present embodiment.It is above-mentioned
The unit of embodiment can be merged into a unit, can also be further split into multiple subelements.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
The above embodiments are merely illustrative of the technical solutions of the present invention and it is non-limiting, reference only to preferred embodiment to this hair
It is bright to be described in detail.It will be understood by those within the art that technical scheme can be modified
Or equivalent substitution, without departing from the spirit and scope of technical solution of the present invention, all should cover in scope of the presently claimed invention
It is central.
Claims (8)
- The method that 1.WLAN keeps continuation when switching to WLAN or 3G, it is characterised in that this method includes：Gateway device goes association messages to judge to go to associate reason according to what the access point first port received was sent, if just Often go to associate, then discharge all resources, otherwise start timing；The gateway device detects whether to receive the connection request message of WLAN terminal transmission before timing terminates, if not receiving Packet data protocol PDP Context is then discharged to the connection request message, otherwise judges the type of the connection request message, And stop timing；It is when association request message of the connection request message between the WLAN terminal and access point second port, then described It is whole that the PDP IP address used during the last association that gateway device will carry in the PDP Context distributes to the WLAN End, carry out network switching；When the connection request message is the PDP context activation request message that 3G business is established in request, then the gateway is set Standby feedback PDP context activation response message, carries out network switching, wherein being carried in the PDP context activation response message The PDP IP address safeguarded during last time association.
- 2. according to the method for claim 1, it is characterised in that carry network in the PDP context activation request message Access Point Identifier.
- 3. according to the method for claim 2, it is characterised in that the gateway device is according to the access point first end received What mouth was sent goes association messages to judge to go before association reason, in addition to：Safeguard and preserve and WLAN ends are distributed in this secondary association Carrying network insertion point identifier in the PDP IP address at end and last PDP context activation request message is with wirelessly connecing Enter to carry the mapping relations between ID.
- 4. according to the method for claim 2, it is characterised in that before the feedback PDP context activation response message, also Including：Establish in this PDP context activation request message and carry the mapping of network insertion point identifier and RAB ID Relation；Carrying network insertion point identifier and the RAB in last PDP context activation request message Mapping relations between ID, search last PDP Context.
- 5. according to the method for claim 1, it is characterised in that methods described also includes：The gateway device is to WLAN nets The conversion of whole signalings between network and 3G network, and 3GPP and the protocol data forms of IEEE 80 2.11 mutual conversion.
- The system that 6.WLAN keeps continuation when switching to WLAN or 3G, including：Gateway device, association messages are gone to judge to go to associate reason for what is sent according to the access point first port received, such as Fruit is normally to go to associate, then discharges all resources, otherwise start timing；Detect whether to receive WLAN terminal before timing terminates The connection request message of transmission, discharge packet data protocol PDP if the connection request message of the terminal transmission is not received Context, otherwise judges the type for the connection request message that the terminal received is sent, and stops timing；When the connection Association request message of the request message between the WLAN terminal and access point second port, the gateway device are used for institute State the PDP IP address used during the last association carried in PDP Context and distribute to the WLAN terminal, carry out network and cut Change；If the connection request message is the PDP context activation request message that 3G business is established in request, the gateway device is used In feedback PDP context activation response message, network switching is carried out, wherein being carried in the PDP context activation response message The PDP IP address safeguarded during last time association；Terminal, the connection request message for transmission is to the gateway device, and with receiving the PDP IP distributed when associating again Location；Access point, for the data transfer between terminal and the gateway device, it is additionally operable to send and removes association messages with terminal To the gateway device；Home eNodeB, for establishing RAB.
- 7. system according to claim 6, it is characterised in that the gateway device, including：Receiving module, receive the transmission of access point first port removes association messages；Sending module, when the connection request message is terminal and access point second port association request message, for will packet The PDP IP address used during the first secondary association carried in data protocol PDP context is sent to the terminal；When the company The PDP context activation request message that request message is established in request for 3G business is connect, for sending PDP context activation response Message, the PDP IP address safeguarded when carrying the first secondary association in the PDP context activation response message；Distribute described first The PDP IP address safeguarded during secondary association is to terminal；WLAN Access Control module, for judging to go to associate reason, if normally going to associate, then discharge all moneys Source, otherwise start timing；It is additionally operable to detect whether the connection request message for receiving WLAN terminal transmission before timing terminates, if Do not receive the connection request message that the terminal is sent and then discharge packet data protocol PDP Context, otherwise judge to receive The connection request message type that sends of the terminal, and stop timing；Switching control submodule, carry out network switching；PDP Context agent sub-module, for safeguarding RAB and its corresponding PDP Context, the PDP IP of distribution Reflecting between the network insertion point identifier and RAB ID that are carried in address and PDP context activation request message Penetrate relation.
- 8. system according to claim 6, it is characterised in that the gateway device, in addition to：Protocol conversion module, for the conversion to whole signalings between wlan network and 3G network, and 3GPP and IEEE The mutual conversion of 802.11 protocol data forms.
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| US20160057677A1 (en) * | 2014-02-21 | 2016-02-25 | Telefonaktiebolaget L M Ericsson (Publ) | Traffic Steering in a WLAN Based on Transmit Power Control |
| WO2016057095A1 (en) * | 2014-10-07 | 2016-04-14 | Intel IP Corporation | Improved resumption of pdn connections for devices regaining wlan connectivity |
| CN107396405A (en) * | 2016-05-17 | 2017-11-24 | 北京信威通信技术股份有限公司 | A kind of method, base station and the terminal of base station access by terminal system |
| US10681597B2 (en) | 2017-01-05 | 2020-06-09 | Htc Corporation | Device and method for handling a packet flow in inter-system mobility |
| CN109874180B (en) * | 2017-12-04 | 2021-01-26 | 成都鼎桥通信技术有限公司 | LTE and WLAN interconnection method and system |
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