CN106804052A - A kind of method and device of network layer handoff - Google Patents
A kind of method and device of network layer handoff Download PDFInfo
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- CN106804052A CN106804052A CN201510845362.5A CN201510845362A CN106804052A CN 106804052 A CN106804052 A CN 106804052A CN 201510845362 A CN201510845362 A CN 201510845362A CN 106804052 A CN106804052 A CN 106804052A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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Abstract
The invention provides a kind of method and device of network layer handoff, it is related to communication technical field, wherein, the method includes：Obtain the movement locus of terminal and the triggering message of reflection Link State；According to the movement locus and triggering message that obtain, the switch operating of Internet is carried out.The technical scheme that the present invention is provided can make more accurately switching judging by combining the movement locus of terminal, improve the accuracy rate of switching；The state and event of bottom can be in time perceived by obtaining triggering message, network layer handoff is quickly carried out, data communication is reduced and is interrupted duration.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of method and device of network layer handoff.
Background technology
For basic mobile IP (Mobile IP) agreement, in the data communication caused by network layer handoff
Disconnected duration includes four parts, referring to Fig. 1.
1.TLayer-2(two layers of link change duration)：Since in basic Mobile IP, Move Detection
Occur after two layers of link are converted.The conversion of so-called two layers of link refer to mobile node (Mobile Node,
Abbreviation MN) two layers of access point conversion, such as the conversion of access point in WLAN.Internet single die cut
In changing, two layers of switching can cause data communication to be interrupted.Relative to two layers of concept of switching, network layer handoff quilt
Referred to as " three layers of switching ".
2.TDETECT(Move Detection time)：TDETECTSize depend on Minimal routing device broadcast interval.
MN is by intercepting whether router broadcast judges oneself move to new IP subnets, and generally router is wide
It is the random number between 0 to 3 seconds to broadcast interval.
3.TACCESS(accessing the turn-on time of route)：Refer to MN and new couple in router (Access
Router, abbreviation AR) access time of negotiation, including MN authenticated times, Care-of Address (letter
Claim COA) setup time.It it is singly the care-of address configuration time also more than hundred milliseconds by test.
4.THD(network layer handoff duration)：Refer to that MN enters walking along the street to far-end correspondent node or home agent
The time updated by binding.
Therefore, duration T is interrupted in data communicationHID=TLayer-2+TDETECT+TACCESS+THD。
The switching for occurring in the manner described above, can cause the network interruption of long period, influence the business of user
Experience.And the data communication break period is long in basic Mobile IP, its essential reason is network
Layer changes insensitive to bottom chain environment.
Additionally, when user is when overlapping covered, it is understood that there may be cannot be accurately judged to which be switched to
One target handover cell or target switching Route Area, so as to cause pingpang handoff, or appearance to stay in
Former overlay area but forces user to switch the phenomenon of behavior, influences the business experience of user.
The content of the invention
Embodiment of the present invention technical problem to be solved is the method and dress for providing a kind of network layer handoff
Put, it is possible to increase the accuracy rate of switching and reduction are because of the data communication interruption duration caused by switching.
In order to solve the above-mentioned technical problem, the present invention is adopted the following technical scheme that：
According to the one side of the embodiment of the present invention, there is provided a kind of method of network layer handoff, including：
Obtain the movement locus of terminal and the triggering message of reflection Link State；
According to the movement locus and triggering message that obtain, the switch operating of Internet is carried out.
Further, the movement locus and triggering message according to acquisition, carries out the switching of Internet
Work, specifically includes：
Monitor the received signal strength value to current belonging network；
When detect the received signal strength value less than preset value when, according to obtain the movement locus and
Triggering message, carries out the switch operating of Internet.
Further, the movement locus and triggering message according to acquisition, carries out the switching of Internet
Work, specifically includes：
According to the movement locus for obtaining, target handover cell or target switching Route Area are determined；
According to the triggering message, current belonging network is carried out with the target handover cell or target switching road
Negotiation action and switching action by the Internet of area's map network.
Further, when the switching action of the Internet is for single-mode network layer switching action, the basis
The triggering message, carries out the association of current belonging network and the Internet of the target handover cell map network
Business acts, and specifically includes：
When the received signal strength value is detected less than preset value, trigger for indicating current belonging network
Link be the first message that will be switched off；
According to the first message, the net of current belonging network and the target handover cell map network is carried out
The negotiation action of network layers, wherein, the negotiation action at least includes：Net corresponding with the target handover cell
The pre-authentication of the new link of network and Care-of Address it is pre-configured.
Further, when the switching action of the Internet is for single-mode network layer switching action, the basis
The triggering message, carries out the switching action of the Internet of current belonging network and the target handover cell,
Specifically include：
Monitor the link of current belonging network and the conversion of the new link of the target handover cell map network
Action；
When the switching motion completion is detected, trigger for indicating the second of the completion of link switching motion to disappear
Breath；
According to second message, the net of current belonging network and the target handover cell map network is carried out
The switching action of network layers.
Further, when the switching action of the Internet is for multimode network layer switching action, the basis
The triggering message, current belonging network switches the negotiation of the Internet of Route Area map network with the target
Action, specifically includes：
When enter current belonging network and target handover cell map network it is overlapping covered when, by mesh
The network interface at mark switching Route Area correspondence networking, carries out current belonging network and switches Route Area with the target
The negotiation action of the Internet of map network, wherein, the negotiation action at least includes：Cut with the target
Change the new link of Route Area map network pre-authentication and Care-of Address it is pre-configured.
Further, it is described when the switching action of the Internet is for multimode network layer switching action, it is described
According to the triggering message, the network that current belonging network switches Route Area map network with the target is carried out
The switching action of layer, specifically includes：
When the received signal strength value is detected less than preset value, trigger for indicating current belonging network
Link be the first message that will be switched off；
According to the first message, current belonging network is carried out with target switching Route Area map network
The switching action of Internet.
According to the another aspect of the embodiment of the present invention, there is provided a kind of device of network layer handoff, including：
Acquisition module, for obtaining the movement locus of terminal and the triggering message of reflection Link State；
Handover module, for according to the movement locus and triggering message for obtaining, carrying out the switching of Internet
Work.
Further, the handover module includes：
Monitoring unit, for monitoring the received signal strength value to current belonging network；
First switch unit, for when the received signal strength value is detected less than preset value, according to obtaining
The movement locus and triggering message for taking, carry out the switch operating of Internet.
Further, the handover module includes：
Determining unit, for according to the movement locus for obtaining, determining target handover cell or target switching
Route Area；
Second switch unit, cuts for according to the triggering message, carrying out current belonging network with the target
The negotiation action of the Internet of changing district or target switching Route Area map network and switching action.
Further, when the switching action of the Internet is for single-mode network layer switching action, described second
Switch unit includes：
First triggering subelement, for when the received signal strength value is detected less than preset value, triggering
For the first message that the link for indicating current belonging network will be switched off；
First consults subelement, for according to the first message, carrying out current belonging network with the target
The negotiation action of the Internet of switching cell map network, wherein, the negotiation action at least includes：With institute
State the new link of target handover cell map network pre-authentication and Care-of Address it is pre-configured.
Further, when the switching action of the Internet is for single-mode network layer switching action, described second
Switch unit includes：
Monitoring subelement, link and the target handover cell map network for monitoring current belonging network
New link switching motion；
Second triggering subelement, for when the switching motion completion is detected, triggering for indicating link
The second message that switching motion is completed；
First switching subelement, for according to second message, carrying out current belonging network with the target
The switching action of the Internet of switching cell map network.
Further, when the switching action of the Internet is for multimode network layer switching action, described second
Switch unit includes：
Second consults subelement, for when the weight for entering current belonging network and target handover cell map network
During superimposition cover area, the network interface at Route Area correspondence networking is switched by target, carry out current belonging network
With the target switching Route Area map network Internet negotiation action, wherein, the negotiation act to
Include less：With the target switching Route Area map network new link pre-authentication and Care-of Address it is prewired
Put.
Further, it is described when the switching action of the Internet is for multimode network layer switching action, it is described
Second switch unit includes：
3rd triggering subelement, for when the received signal strength value is detected less than preset value, triggering
For the first message that the link for indicating current belonging network will be switched off；
Second switching subelement, for according to the first message, carrying out current belonging network with the target
Switch the switching action of the Internet of Route Area map network.
The beneficial effects of the invention are as follows：
Above-mentioned technical proposal, with reference to terminal movement locus and can reflect bottom Link State trigger message,
The switch operating of Internet being carried out, wherein, by considering the movement locus of terminal, can make more accurately
Switching judging, that is, can more accurately determine target handover cell or target switching Route Area, raising is cut
The accuracy changed；Bottom event is perceived by triggering message, can in time carry out cutting for network layer handoff
Change jobs, reduce because network layer handoff and caused by data communication interrupt duration, lifted user business use
Experience.
Brief description of the drawings
Fig. 1 represents that the data outage of network layer handoff process in basic in the prior art mobile IP mechanism shows
It is intended to；
Fig. 2 represents the schematic flow sheet of the method for network layer handoff provided in an embodiment of the present invention；
Fig. 3 represents movement locus schematic diagram provided in an embodiment of the present invention；
Fig. 4 represents one of schematic flow sheet of method of single-mode network layer switching provided in an embodiment of the present invention；
Fig. 5 represents the two of the schematic flow sheet of the method for single-mode network layer switching provided in an embodiment of the present invention；
Fig. 6 represents the schematic diagram of the example of the method for single-mode network layer switching provided in an embodiment of the present invention；
Fig. 7 represents the schematic flow sheet of the method for multimode network layer switching provided in an embodiment of the present invention；
Fig. 8 represents the schematic diagram of the example of the method for single-mode network layer switching provided in an embodiment of the present invention；
Fig. 9 represents terminal inner logic module schematic diagram provided in an embodiment of the present invention；
Figure 10 represents one of block diagram of device of network layer handoff provided in an embodiment of the present invention；
Figure 11 represents the two of the block diagram of the device of network layer handoff provided in an embodiment of the present invention.
Specific embodiment
Exemplary embodiment of the invention is more fully described below with reference to accompanying drawings.Although being shown in accompanying drawing
Exemplary embodiment of the invention, it being understood, however, that may be realized in various forms the present invention without should be by
Embodiments set forth here is limited.Conversely, there is provided these embodiments are able to be best understood from this
Invention, and can by the scope of the present invention it is complete convey to those skilled in the art.
First embodiment
A kind of method of network layer handoff is the embodiment of the invention provides, referring to Fig. 2, the method includes：
The triggering message of S201, the movement locus for obtaining terminal and reflection Link State.
Wherein, above-mentioned triggering message is one or more message, can reflect current certain event of bottom link
Or state, for example, triggering message can be included for indicating the message that current ink will be switched off, can be with
Including the message for indicating current ink to be converted with new link.Terminal, can by obtaining triggering message
The state change and handover event of bottom link are perceived in time, so that for network layer handoff is prepared.
Wherein, the movement locus of terminal can be moved according to the coverage condition of current network and traffic information etc.
The prediction of track.Because the prediction of movement locus has been that, compared with mature technology, the embodiment of the present invention can be by existing
Technology carries out the prediction and acquisition of movement locus, therefore, this embodiment of the present invention is not illustrated excessively.
S201, the movement locus according to acquisition and triggering message, carry out the switch operating of Internet.
By considering the movement locus of terminal, target handover cell or target switching road can be more accurately determined
By area, the accuracy of switching is improved；Bottom event is perceived by triggering message, can in time carry out net
The switch operating of network layers, reduce because network layer handoff and caused by data communication interrupt duration.
Moreover, it is assumed that the packet average value that mobile node sends within the unit interval is
Average(RDATARATE), the packet number of the loss in handoff procedure is Drop (THID), then Drop
(THID)=Average (RDATARATE)*(TLayer-2+TDETECT+TACCESS+THD), and THIDAnd Drop
(THID) it is the key parameter for weighing network layer handoff performance, therefore, when being interrupted by reducing data communication
It is long, the data packet number lost in handoff procedure can be also reduced, data transmission quality is improved, improve network and cut
Transsexual energy, lifts the business experience of user.
Specifically, general terminal understands the received signal strength value of the real-time or current belonging network of periodic monitor, when
When the received signal strength value of the current belonging network of terminal is less than a certain numerical value, that is, work as current ink quality
Decline, it is impossible to when continuing the business demand for meeting user, if there is available network, can be according to the fortune for obtaining
Dynamic rail mark and triggering message, carry out the switch operating of Internet.Wherein, according to the movement locus for obtaining, can
Determine target handover cell or target switching Route Area；According to triggering message, can carry out current belonging network with
The negotiation action of the Internet of target handover cell or target switching Route Area map network and switching action.
It is terminal movement locus schematic diagram provided in an embodiment of the present invention referring to Fig. 3,8 parts are intersected in figure
Broken circle can be regarded as multiple and have overlapping covered cell or Route Area, through the thick of multiple circles in figure
Line can be regarded as the movement locus of the terminal of prediction, and four points in figure on thick line are in overlapping covered
The position that terminal has been passed through or may have been passed through.By the movement locus, target can be more accurately judged
Switching cell or target switching Route Area.For example, with the overlapping region of circle 2, circle 3 and the formation of circle 6 in scheming
Point as a example by, due to movement locus show terminal can by circle 7, then be can determine that according to movement locus and switched
Cheng Wei：Circle 6 is switched to by circle 2, then circle 7 is switched to by circle 6, if without motion track is used as basis for estimation,
May the process of switching be：Circle 3 is switched to by circle 2, circle 6 is switched to by circle 3, then circle 7 is switched to by circle 6,
Switching action is increased, unnecessary power consumption is wasted, while in multiple data communication that also can be caused by switching
It is disconnected, influence the business experience of user.
Specifically, the switching of general networking layer is divided into single mode switching and multimode switching, separately below with reference to single mode
Switching and multimode switching are further elaborated to technical scheme provided in an embodiment of the present invention.
Single mode switches
During single mode switching, the action of switching is participated in due to only having one piece of network interface card, therefore bottom link is cut
Data communication is certain to interrupt during changing, therefore the T in single-mode network layer switchingLayer-2Be one can not
The constant ignored, its value depends on the time delay of bottom link switching.THDGenerally also one can not ignore
Constant, its value depend on network layer address binding update messages mobile node and registration object between road
By duration and registration object to the process time of the message.Therefore, the improvement of single-mode network layer performance of handoffs can
By shortening TDETECTAnd TACCESS, (i.e. bottom link turns " synchronization " two or three layers of switching action as far as possible
Change and network layer handoff) realize.So-called " two or three layers of switching are synchronous " refers to：Two layers of switching are just entered before starting
Three layers of preparation of switching of row, such as care-of address configuration and access authentication, when thus shortening switching
The T of YanzhongACCESS；Once two layers of finishing switching, initiate three layers of switching action immediately, thus shorten
TDETECT.Accomplish two or three layers of switching action " synchronization ", it has to be possible to prediction in time and perception bottom link
State change and handover event.
Referring to Fig. 4, wherein, according to triggering message, carry out current belonging network corresponding with target handover cell
The negotiation action of the Internet of network, specifically includes：
S401, when received signal strength value is detected less than preset value, trigger for indicate it is current belonging to net
The link of network is the first message that will be switched off.
By first message, terminal can in time perceive the state of current bottom link, to be network layer handoff
Prepare.
S402, according to first message, carry out the network of current belonging network and target handover cell map network
The negotiation action of layer.
After first message knows the state of bottom link, in the case of current data link is continuous,
Can be route to neighbouring access by current data link and apply for an available Care-of Address in advance, carried out
With the negotiation action of neighbouring access route, after being converted in bottom link, then carry out with newly
The negotiation action of couple in router, due in the negotiation action carried out with new access route being occurred current
In the case that data link does not disconnect also, therefore, data communication interruption is not resulted in, it is existing so as to avoid
In technology the data communication interruption that route is held consultation caused is accessed with new.
Wherein, negotiation action at least includes：It is prewired with the pre-access certification and Care-of Address for newly accessing route
Put.
Referring to Fig. 5, according to triggering message, the Internet of current belonging network and target handover cell is carried out
Switching action, specifically includes：
The conversion of the new link of S501, the link for monitoring current belonging network and target handover cell map network
Action.
Namely monitor the switching motion of the data link used by current business and new data link.
S502, when detect switching motion complete when, trigger for indicate link switching motion complete second
Message.
By the second message, terminal can in time perceive the transition status of bottom link, to carry out network in time
Layer switching.
S503, according to the second message, carry out the network of current belonging network and target handover cell map network
The switching action of layer.
After bottom link is converted, the second message triggers network layer handoff immediately, it is to avoid because the bottom of at
The data communication that layer link converts afterwards again caused by the detection of moving property is interrupted.
For a further understanding of single mode handoff procedure, it is illustrated with an example below.
Referring to Fig. 6, when terminal interface A carries out data transmission with access route 1, when detection current business
When data link used cannot continue the business demand for meeting user, interface A is to the handover decisions in terminal
Module sends Link_going_down triggerings message (correspondence above-mentioned in first message), informs current number
It is the information that will be switched off according to link, switch decision module (wherein, accesses route to neighbouring access route 2
2 can determine according to movement locus) access request is sent, when the agreement access of route 2 is accessed, handover decisions
Module carries out connecing people's certification and care-of address configuration with route 2 is accessed, meanwhile, enter the trade on suitable opportunity
Preceding data link and the conversion of new link, can cause data communication to interrupt in transfer process, and the time is
TLayer-2, after converting, it is (right that interface A sends Link_Switch triggerings message to switch decision module
Answer it is above-mentioned in the second message), inform the information that link is converted, switch decision module is being received
After Link_Switch triggering message, network layer handoff is carried out immediately, a length of T when used by network layer handoffHD。
During network layer handoff, data redirection is carried out to far-end correspondent node, when network layer handoff is completed,
Interface A will carry out data transmission with route 2 is accessed.
Multimode switches
In heterogeneous network is overlapping covered, mobile node has multiple available network interfaces, newly comes into force
Network interface can receive the router broadcast of corresponding couple in router.Now, new usable interface is complete
Independently of currently valid transmission link, the access authentication and care-of address configuration of neofield can be carried out.If
Without triggering message in the case of, the IP address that Internet currently comes into force can be always maintained at it is constant, until
Mobile node removes its corresponding management domain.After mobile node can not receive the router advertisement messages of old link,
Current IP address can fail within a certain period of time, and now, network layer handoff can be according to new link configuration
Care-of Address is initiated address binding and updates operation to corresponding Correspondent Node and home agent.Therefore, in network
In layer Vertical Handover, basic Mobile IP mechanism in the case of hardly with modification, using new old chain
The characteristics of road is independent of one another can be obtained by the network layer handoff performance of optimization.Now network layer handoff triggers
The data outage time is only " TDETECT+THD”。
If using triggering message, then mobile node just can interrupt leading hairnet network layers and cut in data link
Operation is changed, so as to by all of data redirection to new link.Now old link does not break, and
New link is enabled, because the data outage that network layer handoff is caused is almost nil, except considering link
Outside situation, it is also contemplated that the movement locus of present terminal, to make more accurately switching judging, the motion rail
What mark was instructed is the handover decisions of Internet.
Specifically, according to triggering message, current belonging network switches the network of Route Area map network with target
The negotiation action of layer, specially：When entering, current belonging network is overlap with target handover cell map network
During overlay area, by target switch Route Area correspondence networking network interface, carry out current belonging network with
The negotiation action of the Internet of target switching Route Area map network.
Because in the overlapping covered interior of heterogeneous network, mobile node has multiple available network interfaces, newly
The network interface for coming into force can carry out access authentication and care-of address configuration with corresponding access route, now, when
Preceding data link used is not broken also, and data communication will not be caused to interrupt, therefore, can avoid in the prior art
Because the data communication caused by being held consultation with new access route is interrupted.
Wherein, negotiation action at least includes：It is prewired with the pre-access certification and Care-of Address for newly accessing route
Put.
Referring to Fig. 7, according to triggering message, carry out current belonging network and switch Route Area map network with target
Internet switching action, specifically include：
S701, when received signal strength value is detected less than preset value, trigger for indicate it is current belonging to net
The link of network is the first message that will be switched off.
S701, according to first message, carry out the net that current belonging network switches Route Area map network with target
The switching action of network layers.
Wherein, terminal can in time perceive the state of currently used data link by first message, when discovery is worked as
Preceding data link used is when will be switched off, you can the switching of Internet is carried out, due in currently used Data-Link
Road is that before will be switched off, new data link is enabled, therefore, in the data communication that network layer handoff is caused
Disconnected duration is almost nil.
For a further understanding of above-mentioned multimode handoff procedure, it is illustrated with an example below.
Referring to Fig. 8, when multimode terminal enter heterogeneous network it is overlapping covered when, now multimode terminal leads to
Cross a kind of network and 1 carry out data transmission with route is accessed, that is, in figure by interface B with access road
Carried out data transmission by 1, because multimode terminal is in the overlapping covered interior of heterogeneous network, with multiple
Available network interface, interface A can (wherein, accessing route 2 can be according to fortune with corresponding access route 2
Dynamic rail mark determines) access authentication and care-of address configuration are carried out, so as to can avoid because accessing what is route with new
Data communication caused by consulting is interrupted.In addition, in multimode handoff procedure, in currently used data link
Before not disconnecting also, new data link is enabled, and (wherein, interface B can send to switch decision module
Link_up triggers message, informs that new data link is enabled), therefore, factor data link can be avoided
Data communication caused by conversion is interrupted.Cannot continue to meet use when data link used by current business is detected
During the business demand at family, interface B sends Link_going_down and triggers to the switch decision module in terminal
Message (correspondence above-mentioned in first message), informs the information that current data link will be switched off, and otch is determined
Plan module carries out network layer handoff, in network immediately after Link_going_down triggering message is received
In layer handoff procedure, data redirection is carried out to far-end correspondent node, when network layer handoff is completed, interface
A 2 will carry out data transmission with route is accessed, meanwhile, after data link conversion is completed, interface B to
Switch decision module sends Link_stable triggering message, informs that new data link has been stablized.
It should be noted that network layer handoff treatment logic provided in an embodiment of the present invention is in terminal,
Rather than the solution of network side.Wherein, Fig. 9 is a kind of terminal inner provided in an embodiment of the present invention
Treatment logical schematic.
Network coverage details module 903 in figure is covered for obtaining a range of network around terminal 900
Lid situation；Mapping module 904 in figure is used to obtain the map of the location of terminal 900；Motion in figure
Trajectory prediction module 905 is used for network coverage situation and the map obtained according to network coverage details module 903
The cartographic information that module 904 is obtained carries out the prediction of the movement locus of terminal 900, and the movement locus that will be predicted
Send to switch decision module 906, Target cell or target Route Area are determined by switch decision module 906；
Bottom AM access module 901 in figure is used to monitor the state of bottom link, and monitoring information is sent to bottom
Event manager module 902, is determined to send phase to switching judging module 906 from bottom event manager module 902
The triggering message answered；Finally there are Target cell or target Route Area information that switch decision module 906 will determine
The switch operating that carries out Internet is sent to network layer handoff performing module 907 with corresponding triggering message, and
After the switch operating for completing Internet, data redirection message is sent to far-end correspondent node.
In sum, above-mentioned technical proposal provided in an embodiment of the present invention, with reference to the movement locus and energy of terminal
Enough reflection bottom Link State triggering message, carries out the switch operating of Internet, wherein, by considering terminal
Movement locus, more accurately switching judging can be made, that is, can more accurately determine that target switches
Cell or target switching Route Area, improve the accuracy of switching；Bottom event is felt by triggering message
Know, can in time carry out the preparation and switching action of network layer handoff, reduce because network layer handoff and caused by
Data communication interrupt duration, lifted user business experience.
Second embodiment
A kind of device of network layer handoff is the embodiment of the invention provides, referring to Figure 10, the device includes：
Acquisition module 1001, for obtaining the movement locus of terminal and the triggering message of reflection Link State.
Wherein, above-mentioned triggering message is one or more message, can reflect current certain event of bottom link
Or state, for example, triggering message can be included for indicating the message that current ink will be switched off, can be with
Including the message for indicating current ink to be converted with new link.Terminal, can by obtaining triggering message
The state change and handover event of bottom link are perceived in time, so that for network layer handoff is prepared.
Wherein, the movement locus of the terminal can be carried out according to the coverage condition of current network and traffic information etc.
The prediction of movement locus.Because the prediction of movement locus has been that, compared with mature technology, the embodiment of the present invention can pass through
Prior art carries out the prediction and acquisition of movement locus, therefore, this embodiment of the present invention is not explained excessively
State.
Handover module 1002, for according to the movement locus and triggering message for obtaining, carrying out cutting for Internet
Change jobs.
By considering the movement locus of terminal, target handover cell or target switching road can be more accurately determined
By area, the accuracy of switching is improved；Bottom event is perceived by triggering message, can in time carry out net
The switch operating of network layers, reduce because network layer handoff and caused by data communication interrupt duration.
Moreover, it is assumed that the packet average value that mobile node sends within the unit interval is
Average(RDATARATE), the packet number of the loss in handoff procedure is Drop (THID), then Drop
(THID)=Average (RDATARATE)*(TLayer-2+TDETECT+TACCESS+THD), and THIDAnd Drop
(THID) it is the key parameter for weighing network layer handoff performance, therefore, when being interrupted by reducing data communication
It is long, the data packet number lost in handoff procedure can be also reduced, data transmission quality is improved, improve network and cut
Transsexual energy, lifts the business experience of user.
Further, referring to Figure 11, the handover module 1002 includes：
Monitoring unit 10021, for monitoring the received signal strength value to current belonging network.
First switch unit 10022, for when detect received signal strength value less than preset value when, according to
The movement locus and triggering message of acquisition, carry out the switch operating of Internet.
General monitoring unit 10021 understands the received signal strength value of the real-time or current belonging network of periodic monitor,
When the received signal strength value of the current belonging network of terminal is less than a certain numerical value, that is, when current ink matter
Amount declines, it is impossible to when continuing the business demand for meeting user, if there is available network, the first switch unit
10022 can carry out the switch operating of Internet according to the movement locus and triggering message for obtaining.
Further, referring to Figure 11, the handover module 1002 includes：
Determining unit 10023, for according to the movement locus for obtaining, determining that target handover cell or target are cut
Change Route Area.
Second switch unit 10024, switches for according to triggering message, carrying out current belonging network with target
The negotiation action of the Internet of cell or target switching Route Area map network and switching action.
Further, referring to Figure 11, when the switching action of Internet is for single-mode network layer switching action,
Second switch unit 10024 includes：
First triggering subelement 100241, for when detect received signal strength value less than preset value when,
Trigger the first message for indicating the link of current belonging network to will be switched off.
The first message triggered by the first triggering subelement 100241, terminal can in time perceive current bottom
The state of link, to be prepared for network layer handoff.
First consults subelement 100242, for according to first message, carrying out current belonging network and target
The negotiation action of the Internet of switching cell map network.
After first message knows the state of bottom link, in the case of current data link is continuous,
First negotiation subelement 100242 can be route by current data link to neighbouring access applies for one in advance
Individual available Care-of Address, carries out the negotiation action with neighbouring access route, without turning in bottom link
Change after completion, then consult with new couple in router, due in the association carried out with new access route
Business's action is that occur in the case where current data link does not disconnect also, therefore, do not result in data communication
Interrupt, interrupted so as to avoid the data communication caused by being held consultation with new access route in the prior art.
Wherein, negotiation action at least includes：With the pre-authentication of the new link of target handover cell map network and
Care-of Address it is pre-configured.
Further, referring to Figure 11, when the switching action of Internet is for single-mode network layer switching action,
Second switch unit 10024 includes：
Monitoring subelement 100243, the link for monitoring current belonging network is corresponding with target handover cell
The switching motion of the new link of network.
Wherein, monitoring subelement 100243 can monitor the data link and new Data-Link used by current business
The switching motion on road.
Second triggering subelement 100244, for when switching motion completion is detected, triggering for indicating
The second message that link switching motion is completed.
The second message triggered by the second triggering subelement 100244, terminal can in time perceive bottom link
Transition status, to carry out network layer handoff in time.
First switching subelement 100245, for according to the second message, carrying out current belonging network and target
The switching action of the Internet of switching cell map network.
After bottom link is converted, the first switching subelement 100245 is touched immediately according to the second message
Hair network layer handoff, it is to avoid moving property detects caused again after because converted in bottom link
Data communication is interrupted.
Further, referring to Figure 11, when the switching action of Internet is for multimode network layer switching action,
Second switch unit 10024 includes：
Second consults subelement 100246, for corresponding with target handover cell when current belonging network is entered
Network it is overlapping covered when, the network interface at Route Area correspondence networking is switched by target, carry out current
Belonging network is acted with the negotiation of the Internet of target switching Route Area map network.
Because in the overlapping covered interior of heterogeneous network, mobile node has multiple available network interfaces, because
This, the second negotiation subelement 100246 can be carried out by the network interface for newly coming into force with corresponding access route
Access authentication and care-of address configuration, now, currently used data link is not broken also, will not cause data
Communication disruption, therefore, can avoid in the prior art because routeing caused data of holding consultation with new access
Communication disruption.
Wherein, negotiation action at least includes：With the pre-authentication of the new link of target switching Route Area map network
It is pre-configured with Care-of Address.
Further, referring to Figure 11, when the switching action of Internet is for multimode network layer switching action,
Second switch unit 10024 includes：
3rd triggering subelement 100247, for when detect received signal strength value less than preset value when,
Trigger the first message for indicating the link of current belonging network to will be switched off.
Second switching subelement 100248, for according to first message, carrying out current belonging network and target
Switch the switching action of the Internet of Route Area map network.
Wherein, the first message for being triggered by the 3rd triggering subelement 100247 can perceive currently used in time
The state of data link, when the currently used data link of discovery is the second switching subelement when will be switched off
100248 can carry out the switchings of Internet according to first message, due to will in currently used data link
Before disconnection, new data link is enabled, therefore, duration is interrupted in the data communication that network layer handoff is caused
It is almost nil.
To sum up in described, above-mentioned technical proposal provided in an embodiment of the present invention, with reference to terminal movement locus and
Can reflect that bottom Link State triggers message, carry out the switch operating of Internet, wherein, by considering eventually
The movement locus at end, can make more accurately switching judging, that is, can more accurately determine that target is cut
Changing district or target switching Route Area, improve the accuracy of switching；Bottom event is carried out by triggering message
Perceive, can in time carry out the preparation and switching action of network layer handoff, reduction is made because of network layer handoff
Into data communication interrupt duration, lifted user business experience.
It should be noted that, the device is the dress corresponding with the method for the network layer handoff described in first embodiment
Put, all embodiments in first embodiment can reach what is thought suitable for the embodiment of the device, also
Beneficial effect.
Above-described is the preferred embodiment of the present invention, it should be pointed out that for the ordinary people of the art
For member, some improvements and modifications can also be made under the premise of principle of the present invention is not departed from, these
Improvements and modifications are also within the scope of the present invention.
Claims (14)
1. a kind of method of network layer handoff, it is characterised in that including：
Obtain the movement locus of terminal and the triggering message of reflection Link State；
According to the movement locus and triggering message that obtain, the switch operating of Internet is carried out.
2. method according to claim 1, it is characterised in that described according to the motion for obtaining
Track and triggering message, carry out the switch operating of Internet, specifically include：
Monitor the received signal strength value to current belonging network；
When detect the received signal strength value less than preset value when, according to obtain the movement locus and
Triggering message, carries out the switch operating of Internet.
3. method according to claim 1 and 2, it is characterised in that described according to obtaining
Movement locus and triggering message, carry out the switch operating of Internet, specifically include：
According to the movement locus for obtaining, target handover cell or target switching Route Area are determined；
According to the triggering message, current belonging network is carried out with the target handover cell or target switching road
Negotiation action and switching action by the Internet of area's map network.
4. method according to claim 3, it is characterised in that when the switching action of the Internet
For single-mode network layer switching action when, it is described according to the triggering message, carry out current belonging network with it is described
The negotiation action of the Internet of target handover cell map network, specifically includes：
When the received signal strength value is detected less than preset value, trigger for indicating current belonging network
Link be the first message that will be switched off；
According to the first message, the net of current belonging network and the target handover cell map network is carried out
The negotiation action of network layers, wherein, the negotiation action at least includes：Net corresponding with the target handover cell
The pre-authentication of the new link of network and Care-of Address it is pre-configured.
5. method according to claim 3, it is characterised in that when the switching action of the Internet
It is described according to the triggering message during for single-mode network layer switching action, carry out current belonging network and described
The switching action of the Internet of target handover cell, specifically includes：
Monitor the link of current belonging network and the conversion of the new link of the target handover cell map network
Action；
When the switching motion completion is detected, trigger for indicating the second of the completion of link switching motion to disappear
Breath；
According to second message, the net of current belonging network and the target handover cell map network is carried out
The switching action of network layers.
6. method according to claim 3, it is characterised in that when the switching action of the Internet
For multimode network layer switching action when, it is described according to the triggering message, carry out current belonging network with it is described
The negotiation action of the Internet of target switching Route Area map network, specifically includes：
When enter current belonging network and target handover cell map network it is overlapping covered when, by mesh
The network interface at mark switching Route Area correspondence networking, carries out current belonging network and switches Route Area with the target
The negotiation action of the Internet of map network, wherein, the negotiation action at least includes：Cut with the target
Change the new link of Route Area map network pre-authentication and Care-of Address it is pre-configured.
7. method according to claim 3, it is characterised in that described when the switching of the Internet
Act for multimode network layer switching action when, it is described according to the triggering message, carry out current belonging network with
The switching action of the Internet of the target switching Route Area map network, specifically includes：
When the received signal strength value is detected less than preset value, trigger for indicating current belonging network
Link be the first message that will be switched off；
According to the first message, current belonging network is carried out with target switching Route Area map network
The switching action of Internet.
8. a kind of device of network layer handoff, it is characterised in that including：
Acquisition module, for obtaining the movement locus of terminal and the triggering message of reflection Link State；
Handover module, for according to the movement locus and triggering message for obtaining, carrying out the switching of Internet
Work.
9. device according to claim 8, it is characterised in that the handover module includes：
Monitoring unit, for monitoring the received signal strength value to current belonging network；
First switch unit, for when the received signal strength value is detected less than preset value, according to obtaining
The movement locus and triggering message for taking, carry out the switch operating of Internet.
10. device according to claim 8, it is characterised in that the handover module includes：
Determining unit, for according to the movement locus for obtaining, determining target handover cell or target switching
Route Area；
Second switch unit, cuts for according to the triggering message, carrying out current belonging network with the target
The negotiation action of the Internet of changing district or target switching Route Area map network and switching action.
11. devices according to claim 10, it is characterised in that when the switching of the Internet is moved
During as single-mode network layer switching action, second switch unit includes：
First triggering subelement, for when the received signal strength value is detected less than preset value, triggering
For the first message that the link for indicating current belonging network will be switched off；
First consults subelement, for according to the first message, carrying out current belonging network with the target
The negotiation action of the Internet of switching cell map network, wherein, the negotiation action at least includes：With institute
State the new link of target handover cell map network pre-authentication and Care-of Address it is pre-configured.
12. devices according to claim 10, it is characterised in that when the switching of the Internet is moved
During as single-mode network layer switching action, second switch unit includes：
Monitoring subelement, link and the target handover cell map network for monitoring current belonging network
New link switching motion；
Second triggering subelement, for when the switching motion completion is detected, triggering for indicating link
The second message that switching motion is completed；
First switching subelement, for according to second message, carrying out current belonging network with the target
The switching action of the Internet of switching cell map network.
13. devices according to claim 10, it is characterised in that when the switching of the Internet is moved
During as multimode network layer switching action, second switch unit includes：
Second consults subelement, for when the weight for entering current belonging network and target handover cell map network
During superimposition cover area, the network interface at Route Area correspondence networking is switched by target, carry out current belonging network
With the target switching Route Area map network Internet negotiation action, wherein, the negotiation act to
Include less：With the target switching Route Area map network new link pre-authentication and Care-of Address it is prewired
Put.
14. devices according to claim 10, it is characterised in that the cutting when the Internet
Move during as multimode network layer switching action, second switch unit includes：
3rd triggering subelement, for when the received signal strength value is detected less than preset value, triggering
For the first message that the link for indicating current belonging network will be switched off；
Second switching subelement, for according to the first message, carrying out current belonging network with the target
Switch the switching action of the Internet of Route Area map network.
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