CN101631367A - Method for switching terminal equipment among access equipment, access equipment and terminal equipment - Google Patents
Method for switching terminal equipment among access equipment, access equipment and terminal equipment Download PDFInfo
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- CN101631367A CN101631367A CN200910171304A CN200910171304A CN101631367A CN 101631367 A CN101631367 A CN 101631367A CN 200910171304 A CN200910171304 A CN 200910171304A CN 200910171304 A CN200910171304 A CN 200910171304A CN 101631367 A CN101631367 A CN 101631367A
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Abstract
The invention provides a method for switching terminal equipment among access equipment, access equipment and terminal equipment. The method comprises the following steps: the terminal equipment scans the access equipment which can provide an access service; the target access equipment is selected according to the obtained motion state information of the access equipment and relevant information; and the terminal equipment is switched into the target access equipment from the current access equipment. The embodiment of the invention adopts the information containing the motion state information of the access equipment as the reference information for selecting the target access equipment during switching, improves the availability of the terminal equipment for selecting the target access equipment, improves the switching efficiency and ensures the continuity of services.
Description
Technical field
The present invention relates to communication network technology, particularly the method, access device and the terminal equipment that between access device, switch of terminal equipment.
Background technology
At present, 802.21 and 802.11r/v in research at travelling carriage (STA) handoff procedure between diverse access point (AP) is all arranged, when travelling carriage STA detects current access point AP the access service that meets the demands can not be provided, just will consider and switch to better access point AP of periphery, at this moment, at first the scanning periphery can provide the access point AP of access service, as the target access of switching, and finish handoff procedure according to the suitable access point of Information Selection such as signal strength signal intensity, present load from former access point to target access.
At present, the provisional capital is that Ethernet connects on Wireless Fidelity in the WLAN (wireless local area network) (WIFI:Wireless Fidelity) access device, substantially all be to lay with the fixed position, when non-AP terminal equipment (non-APSTA) when scanning available AP, as long as the moving range of this non-AP terminal equipment does not exceed the coverage of this AP, this AP just can provide access service for this terminal equipment.
But along with the development of wireless communication technique, the WIFI access device is up also may to be the mode of wireless connections, for example, WIMAX, 3GPP etc., and the position of laying also may expand on the mobile vehicles from fixed place, for example, train, bus are first-class.
Therefore, in realizing process of the present invention, the inventor finds that the defective of prior art is: if AP is laid on the vehicles, even the very strong AP of signal that the non-AP terminal equipment (not on the vehicles) of a fixed-site at a time scans, also following situation can appear: because the fast moving of this AP, when behind selected this AP of this terminal equipment, become unavailable in the time of related with this AP.Under these circumstances, this terminal equipment can only scan the AP that selectes other once more, will inevitably prolong the process of switching like this, and professional continuity is affected.
Summary of the invention
The method, access device and the terminal equipment that provide a kind of terminal equipment to switch between access device is provided the purpose of the embodiment of the invention.By reference information with the motion state information of access device select target access device when switching, improved the availability of terminal equipment select target access device, improve switching efficiency, guarantee professional continuity.
For achieving the above object, the method that the embodiment of the invention provides a kind of terminal equipment to switch between access device, this method comprises: terminal equipment scanning can provide the access device of access service; Motion state information and relevant information according to the described access device that obtains are determined the target access device; Described terminal equipment switches to the target access device from current access device.
For achieving the above object, the method that the embodiment of the invention provides a kind of terminal equipment to switch between access device, this method comprises: access device obtains the current state of described access device; Notify terminal equipment in the described access device overlay area with the motion state information of described current state correspondence.
For achieving the above object, the embodiment of the invention provides a kind of terminal equipment, and this terminal equipment comprises:
Scanning element, described scanning element are used to scan the access device that access service can be provided;
Information acquisition unit is used to obtain the motion state information of access device;
Selected cell, described selected cell are used for motion state information and the relevant information select target access device according to the described access device that obtains;
Switch unit, described switch unit are used for described terminal equipment is switched to the target access device from current access device.
For achieving the above object, the embodiment of the invention provides a kind of access device, and this access device comprises:
Status determining unit is used for determining the current state of access device;
Notification unit is used for notifying terminal equipment in the described access device overlay area with the motion state information of described current state correspondence.
The beneficial effect of the embodiment of the invention is, by reference information with the motion state information of access device select target access device when switching, improve the availability of terminal equipment select target access device, improved switching efficiency, guaranteed professional continuity.
Description of drawings
Accompanying drawing described herein is used to provide the further understanding to the embodiment of the invention, constitutes the application's a part, does not constitute the qualification to the embodiment of the invention.In the accompanying drawings:
Fig. 1 is that the terminal equipment of the embodiment of the invention 1 constitutes schematic diagram;
Fig. 2 is that the terminal equipment of the embodiment of the invention 2 constitutes schematic diagram;
Fig. 3 is the formation schematic diagram of the selected cell of the embodiment of the invention 2;
Fig. 4 is one of the formation schematic diagram of the information acquisition unit of the embodiment of the invention 2;
Fig. 5 is the flow chart of inquiry access device movable information in the embodiment of the invention 2;
Fig. 6 be the embodiment of the invention 2 information acquisition unit the formation schematic diagram two;
Fig. 7 is that the access device of the embodiment of the invention 3 constitutes schematic diagram;
Fig. 8 is that the access device of the embodiment of the invention 4 constitutes schematic diagram;
Fig. 9 is the changing method flow chart of the embodiment of the invention 5;
Figure 10 is the changing method flow chart of the embodiment of the invention 6;
Figure 11 is the changing method flow chart of the embodiment of the invention 7.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention is clearer,, the embodiment of the invention is described in further detail below in conjunction with accompanying drawing.At this, illustrative examples of the present invention and explanation thereof are used to explain the present invention, but not as a limitation of the invention.
Method, access device and terminal equipment that the embodiment of the invention provides a kind of terminal equipment to switch between access device.Below in conjunction with accompanying drawing the embodiment of the invention is elaborated.
Embodiment 1
The embodiment of the invention provides a kind of terminal equipment, and as shown in Figure 1, this terminal equipment comprises scanning element 101, information acquisition unit 102, selected cell 103 and switch unit 104; Wherein, this scanning element 101 is used to scan the access device that access service can be provided; Information acquisition unit 102 is used to obtain the motion state information of access device; This selected cell 103 is used for motion state information and the relevant information select target access device according to this access device that obtains; This switch unit 104 is used for this terminal equipment is switched to the target access device from current access device.
In the present embodiment, this access device can be the access point AP equipment in the WLAN (wireless local area network).This WLAN (wireless local area network) can be to have the fixedly WLAN (wireless local area network) of AP and mobile AP simultaneously, or radio honeycomb grid (MESH) network.
In the present embodiment, this motion state information can comprise state information or comprise state information and movable information.Wherein, this state information can comprise information such as motion state, non-motion state; This movable information can comprise information such as the direction of motion and speed.Above-mentioned state information or movable information can obtain in advance, and store, and use for this terminal equipment, in addition, also can obtain this motion state information in real time.
In the present embodiment, when access device remains static, this motion state information can only comprise state information, like this, this selected cell 103 is reference motion information not, and directly according to relevant information select target access devices such as signal strength signal intensity, present load, transmitting powers, similar with existing mode, repeat no more herein.
In the present embodiment, when access device is kept in motion, this selected cell 103 can determine whether this access device is kept in motion according to the state information of this access device, if this access device is kept in motion, then this selected cell 103 also needs movable information and the relevant information select target access device in conjunction with this access device, at this moment, this motion state information not only comprises state information but also comprises movable information.Wherein, this relevant information can comprise information such as the signal strength signal intensity, present load, transmitting power of the current access device of this terminal equipment periphery, and is similar with prior art, repeats no more herein.
From the above,, improved the availability of terminal equipment select target access device, improved switching efficiency, guaranteed professional continuity by reference information with the motion state information of this access device select target access device when switching.
Embodiment 2
The embodiment of the invention provides a kind of terminal equipment, and as shown in Figure 2, this terminal equipment comprises scanning element 201, information acquisition unit 202, selected cell 203 and switch unit 204, and its effect is similar to Example 1, repeats no more herein.
In the present embodiment, as shown in Figure 3, selected cell 203 comprises first status determining unit 301 and target selection unit 302; Wherein, this first status determining unit 301 is used for determining according to this state information the motion state of this access device; This target selection unit 302 is used for when this first status determining unit 302 determines that the motion state of this access device is static, according to this relevant information select target access device; And be used for when determining that according to this first state information determining unit 301 motion state of this access device is motion, according to this movable information and relevant information select target access device.
In the present embodiment, as shown in Figure 2, this terminal equipment also can comprise memory cell 205, is used for this motion state information that the store information acquiring unit obtains.
In the present embodiment, information acquisition unit 202 is obtained this motion state information and is specifically comprised: receive the broadcast of this access device, extract and carry motion state information in this broadcast.
Wherein, can increase new information field in the beacon frame of the broadcast of this access device, for example, increase on the basis of original beacon frame in " movable information (Motion Information) territory ", the information format in this movable information territory is as shown in table 1.
Table 1
| Component identification | Length | The motion indication | Direction | Speed unit | Horizontal velocity | Vertical speed |
| ??1 | ??1 | ??1 | ??2 | ??1 | ??2 | ??2 |
Wherein, the information in this movable information territory can comprise state information and movable information.As shown in table 1, also can comprise out of Memory, for example information such as component identification, length.In the table 1, " 1 " " 2 " are meant the number of corresponding domain shared byte in message frame, and for example, " component identification " accounts for a byte in message frame.
Information in this movable information territory can comprise successively: component identification (Elememt ID), length (Length), motion indication (Motion Idicator), the direction of motion (Bearing), speed unit (Speed Units), horizontal velocity (Horizontal Speed), vertical speed (VerticalSpeed).
Wherein, should be used for identifying the state information of this access device by " motion indication " information field: for example, " 0 " expression is static; " 1 " expression setting in motion; In " 2 " expression motion; " 3 " expression motion finishes; The unknown state of " 4 " expression; " 5～255 " keep.This movable information can comprise the direction of motion, level and the speed that moves both vertically.
When this access device is in non-motion state, when for example static, above-mentioned movable information territory can only comprise state information, simplified operation like this.Perhaps also can be set to sky by corresponding movable information.
Above-mentioned motion state information is to be broadcast to this terminal equipment by the beacon frame (Beacon) that comprises " movable information territory ", but is not limited thereto, and also can adopt other information broadcast to give this terminal equipment.
From the above, this access device is in order in time to notify its motion state information the terminal equipment under its covering, make this terminal equipment obtain this motion state information, this access device can be broadcast to this terminal equipment by the beacon frame (Beacon) that will comprise " movable information territory ".Like this, when this terminal equipment is in the overlay area of this access device, this terminal equipment with the motion state that just can know current this access device before this access device is related by the beacon frame (Beacon) that receives, thereby as one of decision-making foundation of the own target access device of determining to want association.
In the present embodiment, information acquisition unit 202 also can receive the state information of this access device broadcasting, determine according to this state information that receives whether this access device is kept in motion,, then obtain the movable information of this access device if determine that this access device is kept in motion.
Like this, as shown in Figure 4, information acquisition unit 202 can comprise first receiving element 401, second status determining unit 402, query requests transmitting element 403 and second receiving element 404; Wherein, first receiving element 401 is used to receive the state information that this access device is broadcasted; Second status determining unit 402 is used for determining according to this state information that first receiving element 401 receives whether this access device is kept in motion; Query requests transmitting element 403 is used for sending the query requests of the movable information of inquiring about this access device to this access device when second status determining unit 402 determines that this access device is kept in motion; Second receiving element 404 is used to receive this movable information that this access device returns according to this query requests.For example, this movable information comprises information such as movement velocity and direction.
Wherein, ability information territory shown in table 2 and table 3 (Capability Information Field), this access device can be broadcasted the state information of this access device by beacon (Beacon) frame, wherein, utilize 1 spare bits (B12) in the ability information territory of this beacon frame to indicate the state information of this access device, for example, when this access device is in non-motion state, when static, this position is " 0 "; When being kept in motion, this position is " 1 ".When this terminal equipment receives this beacon frame, can be that " 1 " or " 0 " know whether this access device is kept in motion according to this position.
Table 2
Table 3
In table 2, table 3, ESS: extended service set; IBSS: independent basic service set; CF Pollable: but non-competing poll; CF-Poll Request: non-competing polling request; Privacy: encrypt; ShortPreamble: short-range missile frequency domain; PBCC: grouping binary system redundancy encoding; Channel Agility: channel activity; Spectrum Mgmt: spectrum management; QOS: service quality; Short slot time: crack in short-term; APSD: automatic power save transmits; Re-served: keep; Motion: motion indication; DSSS-OFDM: just the modulating of direct sequence spread spectrum than frequency division multiplexing; Delayed Block Ack: criticizing of delay replied; Immediate Block Ack: criticizing at once replied.
In addition, above-mentioned is embodiment only, is not limited thereto kind of a mode, and this state information can also be broadcasted by other message or newly-increased message.
In the present embodiment, this terminal equipment can utilize generic advertisement service (the GAS:Generic Advertisement Service) agreement that defines among the 802.11u to inquire about this movable information.By GAS local search function, this terminal equipment can with just can obtain the more information relevant, for example movable information (comprising information such as movement velocity and direction) before this access device is related from this access device with current access device.Wherein, the process of utilizing GAS agreement inquiry access device local information as shown in Figure 5.But be not limited thereto, this query requests transmitting element 403 also can send query requests by other solicited message.
From the above, this terminal equipment receives the state information of access device broadcasting, if this state information shows when this access device is kept in motion, obtain corresponding movable information according to query requests, reference information with this this state information and movable information select target access device when switching, improve the availability of terminal equipment select target access device, improved switching efficiency, guaranteed professional continuity.
In the present embodiment, as shown in Figure 6, information acquisition unit 202 also can adopt following formation: information acquisition unit 202 comprises probe requests thereby transmitting element 601 and the 3rd receiving element 602; Wherein, probe requests thereby transmitting element 601 is used for broadcasting the probe request message of obtaining this motion state information to the neighboring area; The 3rd receiving element 602 is used to receive the probe response message of carrying this motion state information that this access device returns according to this probe requests thereby.
In the present embodiment, this terminal equipment can be broadcasted this probe request message to periphery, for example broadcast Probe Request message, the access device that exists with the active probe neighboring area, after an access device is received this Probe Request message, return probe response message to the terminal equipment that sends this Probe Request message, for example Probe Response message.
In the present embodiment, this probe response message can comprise motion state information, promptly when this access device remains static, only needs to send this state information to this terminal equipment by response message; If after this access device is kept in motion and has known movable information, can comprise state information and movable information in this response message.In addition, also can comprise out of Memory, for example, information such as the sign of relevant this access device itself, attribute, transmitting power.
In the present embodiment, this probe response message can be by newly-added information territory in original Probe Response message, and for example realize in " movable information territory ", and the similar table 1 of the form in this movable information territory repeats no more herein.But be not limited to aforesaid way, this probe request message also can be broadcasted by newly-increased message.This probe response message also can transmit this motion state information by newly-increased response message.
From the above, after in this Probe Response message, carrying the motion state information of this access device itself, the terminal equipment that sends probe requests thereby (Probe Request message) is when receiving this Probe Response message, just can be by parsing or the current state information of this access device to " movable information territory " in the Probe Response message, when this access device is kept in motion, can be in conjunction with the movable information of this access device, and other sign and attribute, transmitting power, signal strength signal intensity, information such as present load are determined oneself and related target access device.
By the foregoing description as can be known, the reference information of the select target access device when switching of the motion state information by the access device that will obtain has improved the availability of terminal equipment select target access device, improves switching efficiency, guarantees professional continuity.
Embodiment 3
The embodiment of the invention provides a kind of access device, and as shown in Figure 7, this access device comprises status determining unit 701 and notification unit 702; Wherein, this state determines that Unit 701 are used for determining this access device current state; This notification unit 702 will this current state correspondence motion state information notify terminal equipment in this access device overlay area.
In the present embodiment, the motion state information of these notification unit 702 notices can comprise the state information of current state correspondence, like this, the terminal equipment in this access device overlay area can be known this state information, and this state information can comprise information such as motion state, non-motion state.
In the present embodiment, this access device can be judged its current state, when it is in static or during state such as motion state, can be by the state information notification terminal equipment of broadcast with the current state correspondence, this broadcast can be used beacon (Beacon) frame, shown in the table 1 of embodiment 2, table 3, repeat no more herein.In addition, also can newly establish other broadcast and broadcast this motion state information.
By the foregoing description as can be known, this access device is by the state information notification terminal equipment with its current state correspondence, make this terminal with the reference information of this state information as the select target access device, improved the availability of terminal equipment select target access device, improve switching efficiency, guarantee professional continuity.
Embodiment 4
The embodiment of the invention provides a kind of access device, and as shown in Figure 8, this access device comprises status determining unit 801 and notification unit 802, and its effect is similar to Example 3, repeats no more herein.
As shown in Figure 8, this access device also comprises movable information acquiring unit 803, when status determining unit 801 determines that the current state of this access device is motion state, obtains the movable information of this access device; Like this, this notification unit 803 notifies the motion state information of the terminal equipment in this access device overlay area also to comprise movable information.
In the present embodiment, when status determining unit 801 determines that the state information of the current state correspondence of this access device is motion state, after notification unit 802 is notified this terminal equipment, this access device can receive the query requests that this terminal equipment sends according to this motion state information, and this access device can return to terminal equipment with the movable information that obtains according to this query requests.Its process repeats no more as shown in Figure 5 herein.Like this, this access device also comprises the query requests receiving element 804 and first transmitting element 805; Wherein, query requests receiving element 804 is used to receive the query requests of the movable information of this access device of inquiry that this terminal equipment sends; First transmitting element 805 is used for according to this query requests this movable information being sent to this terminal equipment.
In the above-described embodiments, this status determining unit 801 determines that the residing states of this access device can be in the following ways:
First kind: can come its current state of perception according to the sensing apparatus that is provided with on this access device, at this moment, this status determining unit 801 can be sensing apparatus, as on AP on the access device, increasing microelectromechanical systems (MEMS), this access device can pass through the current motion state of this microelectromechanical systems (MEMS) perception, when access device was kept in motion, this system can use speed and the direction of quickening the induction installation perceive motion.
In this case, if sense this access device when being kept in motion, then the movable information acquiring unit 803 of this access device calculates by the size of movement velocity on different azimuth that senses, finally obtain information such as the speed of the current motion of this access device and direction by the velocity composition algorithm, in addition, can also determine the radius of motion that access device is done curvilinear motion by different movement velocity and directions constantly more than 3, concrete computational methods can adopt existing account form, do not repeat them here.
Second kind: by determining its motion state with the information interaction of outside.
Wherein, this access device can provide wireless access way for terminal equipment, and this access device itself can be done up access in wired or wireless mode.When this access device is laid in mobile scene, then this access device is connected (or satellite network) with wireless up access way with wide Cellular Networks, this access device of this moment is except that the access point apparatus of having played the part of the terminal equipment in the WLAN, or a cellular network terminal equipment.For example, support that the up access device of WIMAX itself is exactly a terminal equipment in the WIMAX wireless cellular network, because the present location service enabled of cellular networks such as WIMAX own can provide location-based service for the terminal equipment in the cellular coverage.
Like this, the status determining unit 801 of this access device just can obtain the change in location information of oneself from current cellular networks such as WIMAX, and by calculating the state information of oneself.
In this case, when definite this access device is kept in motion, then the movable information acquiring unit 803 of this access device can according to detected on different azimuth the size of movement velocity, finally obtain information such as the speed of the current motion of this access device and direction by the velocity composition algorithm.Perhaps this movable information acquiring unit 802 directly obtains information such as its speed and direction from network.
The third: by judging its motion state with the information interaction of external movement checkout gear.
In this case, the status determining unit 801 of this access device and movable information acquiring unit 803 can receive current state information from the motion detection apparatus in the accompanying moving object (vehicles), perhaps also receive movable information.
In the foregoing description, after this access device can be known its current state, its state information is broadcast to terminal equipment in its coverage.
In addition, when this access device knew that it is kept in motion, this access device also can further obtain the movable information of this access device, this state information and movable information was broadcast to terminal equipment in its coverage, for this terminal equipment reference.When this state information when being static, also can not broadcast this movable information.
In addition, this access device also can send its motion state information to terminal equipment by response message, for this terminal equipment reference.Like this, this access device also comprises the probe requests thereby receiving element 806 and second transmitting element 807; Wherein, receiving when terminal equipment before the motion state information of access device notice, probe requests thereby receiving element 806 is used to receive the probe request message that this terminal equipment sends; This second transmitting element 807 is used for according to this probe request message motion state information being carried at probe response message and is sent to this terminal equipment.
Wherein, static if this access device is in, only respond this state information and get final product.If this access device is kept in motion, then need to respond this state information and movable information.
In this case, this probe request message and probe response message can adopt Probe Request message and Probe Response message respectively, as described in embodiment 2, repeat no more herein.In addition, also can adopt newly-increased message to ask and respond.
By the foregoing description as can be known, this access device is by giving terminal equipment with the motion state information broadcast or the response of its current state correspondence, make this terminal with the reference information of this state information as the select target access device, improved the availability of terminal equipment select target access device, improve switching efficiency, guarantee professional continuity.
Embodiment 5
The method that the embodiment of the invention provides a kind of terminal equipment to switch between access device, this method comprises: terminal equipment scanning can provide the access device (seeing step 901) of access service; Motion state information and relevant information select target access device (seeing step 902) according to this access device that obtains; This terminal equipment switches to target access device (seeing step 903) from current access device.
In the present embodiment, this access device can be the access point AP in the WLAN (wireless local area network).This WLAN (wireless local area network) can be to have the fixedly WLAN (wireless local area network) of AP and mobile AP simultaneously, or radio honeycomb grid (MESH) network.
In the present embodiment, this motion state information can comprise state information or comprise state information and movable information; Wherein, this state information can comprise information such as motion state, non-motion state; This movable information can comprise information such as the direction of motion and speed.Above-mentioned state information or movable information can obtain in advance, and store, and use for this terminal equipment.
From the above,, improved the availability of terminal equipment select target access device, improved switching efficiency, guaranteed professional continuity by reference information with the motion state information of this access device select target access device when switching.
Embodiment 6
The method that the embodiment of the invention provides a kind of terminal equipment to switch between access device, in step 902, can be in the following way according to the motion state information of the access device that obtains and relevant information select target access device, as shown in figure 10,
If step 1003 is when determining in the step 1002 that this access device is kept in motion, according to the movable information and the relevant information select target access device of this access device.Wherein, this relevant information can comprise information such as the signal strength signal intensity, present load, transmitting power of current access device, and is similar with prior art, repeats no more herein.
In the present embodiment, obtaining access device motion state information can be in the following way:
First kind: this terminal equipment can receive the broadcast of this access device, extracts the state information of carrying in the rich message in this pass.Wherein, access device can be broadcasted this state information by beacon frame, shown in the table 2 of embodiment 2, table 3, repeats no more herein.But be not limited thereto kind of a mode, this state information can also be broadcasted by other message or newly-increased message.
In this case, when this terminal equipment determines that according to this state information this access device is kept in motion, if this terminal equipment also seeks out movable information, for example, information such as movement velocity and direction, then this terminal equipment also can send this access device of inquiry the query requests of movable information to this access device, and receive the movable information that this access device returns according to this query requests.Like this, this terminal equipment can be according to the relevant target access device of association with it of selecting with other of this movable information.
In the present embodiment, this terminal equipment can utilize generic advertisement service (the GAS:Generic Advertisement Service) agreement that defines among the 802.11u to inquire about, as described in embodiment 2, repeat no more herein.This query script but is not limited thereto as shown in Figure 5, also can send query requests by other solicited message.
Like this, when access device remains static, can not need reference motion information to select; But when access device is kept in motion, this terminal equipment can like this, can improve switching efficiency with the state information of this access device, movable information as reference Information Selection target access device, keep professional continuity, solved problems of the prior art.
Second kind: this terminal equipment can receive the broadcast of this access device, extracts the state information and the movable information that carry in this broadcast.
In this case, this access device increases new information field in beacon frame, for example, increases on the basis of original beacon frame in " movable information territory ", and the information format in this territory repeats no more shown in the table 1 of embodiment 2 herein.
When access device is in when static, the movement velocity direction in this movable information territory can be set to sky.
In this way, this terminal equipment can be determined the residing state of this access device according to the information of carrying in this broadcast message, if motion state, then this terminal equipment is selected according to this movable information and other relevant information again.
The third: terminal equipment receives the probe response message that peripheral access device returns to its peripheral access device broadcast probe request message, and portability comprises the information of motion state information in this probe response message.The information such as sign, attribute, transmitting power that also can comprise in addition, this access device itself in this response message.
The message of above-mentioned probe request message, probe response message repeats no more as described in the embodiment 2 herein.
In this way, this terminal equipment can be determined the residing state of this access device according to the information of carrying in this broadcast message, if motion state, then this terminal equipment is again according to this movable information and other relevant information select target access device, thereby improved the availability of terminal equipment select target access device, improve switching efficiency, guarantee professional continuity.
Embodiment 7
The method that the embodiment of the invention provides a kind of terminal equipment to switch between access device, as shown in figure 11, this method comprises:
In the present embodiment, this state information shows the state of this access device, is in static or is in states such as motion.
Shown in the table 3 of embodiment 2, this access device can be broadcasted the state information of this access device by beacon (Beacon) frame, wherein, utilize 1 spare bits (B12) in the ability information territory of this beacon frame to indicate the state information of this access device, for example, when this access device is in non-motion state, when static, this position is " 0 "; When being kept in motion, this position is " 1 ".In addition, above-mentioned is embodiment only, is not limited thereto kind of a mode, and this state information can also be broadcasted by other message or newly-increased message.
From the above, this terminal equipment is according to state information and other relevant information select target access device of access device broadcasting, thereby improved the availability of terminal equipment select target access device, improves switching efficiency, guarantees professional continuity.
Embodiment 8
The method that the embodiment of the invention provides a kind of terminal equipment to switch between access device, on the basis of embodiment 7, after step 1101 access device obtained the current state of this access device, this method also comprised: this access device determines whether its current state is motion state; If determine that the result for being, then obtains the movable information of this access device, like this, when also notifying this access device in step 1102, this motion state information is carried movable information.
From the above, after this access device is known its state information and movable information, can directly this state information and movable information be broadcast to terminal equipment in its overlay area by broadcast, make this terminal further according to this state information and movable information and relevant information select target access device.Wherein, the broadcast of employing repeats no more shown in the table 1 of embodiment 2 herein.
In addition, in the present embodiment, when the motion state information of the current state correspondence that access device in the step 1101 obtains be motion state and access device with the terminal equipment in this access device overlay area of this state information notification after, this access device also can receive the query requests of the movable information of this access device of inquiry that this terminal equipment sends; According to this query requests movable information is sent to this terminal equipment.Wherein, this terminal equipment can utilize generic advertisement service (the GAS:Generic Advertise-ment Service) agreement that defines among the 802.11u to inquire about this movable information.By GAS local search function, this terminal equipment can with just can obtain the more information relevant before this access device is related from this access device with current access device, for example, movable information (comprising information such as movement velocity and direction).Wherein, the process of utilizing GAS agreement inquiry access device local information as shown in Figure 5.But be not limited thereto, this terminal equipment also can send query requests by other solicited message.
In the present embodiment, before access device is notified the motion state information of current state correspondence on terminal equipment in this access device overlay area, but this access device is the probe request message of receiving terminal apparatus transmission also, the probe response message that to carry motion state information according to this probe request message is sent to this access device, wherein, this probe response message can be by newly-added information territory in original Probe Response message, for example realize in " movable information territory ", the similar table 1 of the form in this movable information territory repeats no more herein.But be not limited to aforesaid way, this probe request message also can be broadcasted by newly-increased message.This probe response message also can transmit this motion state information by newly-increased response message.
From the above, after in this Probe Response message, carrying the motion state information of this access device itself, the terminal equipment that sends probe requests thereby (Probe Request message) is when receiving this Probe Response message, just can be by parsing or the current state information of this access device to " movable information territory " in the Probe Response message, when this access device is kept in motion, can be in conjunction with the movable information of this access device, and other sign and attribute, transmitting power, signal strength signal intensity, information such as present load are determined oneself and related target access device.
In the above-described embodiments, determine motion state and the movable information of motion state correspondence such as several situations among the embodiment 6 of this access device, can come its current state of perception according to the sensing apparatus that is provided with on this access device; Can be by determining its motion state with the information interaction of outside; Can be by judging its motion state with the information interaction of external movement checkout gear, concrete definite mode repeats no more as described in the embodiment 4 herein.
By the foregoing description as can be known, this terminal equipment can be according to the residing state of this access device that obtains from access device, if motion state, then this terminal equipment is again according to this movable information and other relevant information select target access device, thereby improved the availability of terminal equipment select target access device, improve switching efficiency, guarantee professional continuity.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiments of the invention; and be not intended to limit the scope of the invention; within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (20)
1. the method that terminal equipment switches between access device is characterized in that, described method comprises:
Terminal equipment scanning can provide the access device of access service;
Motion state information and relevant information select target access device according to the described access device that obtains;
Described terminal equipment switches to the target access device from current access device.
2. method according to claim 1 is characterized in that, described motion state information comprises state information;
The motion state information of the described access device that described basis is obtained and relevant information select target access device comprise:
Determine the motion state of described access device according to described state information;
If when determining that according to described state information the motion state of described access device is static, then according to described relevant information select target access device.
3. method according to claim 2 is characterized in that, described motion state information also comprises movable information;
Described method also comprises:
If when determining that according to described state information the motion state of described access device is motion, then according to described movable information and relevant information select target access device.
4. method according to claim 1 is characterized in that, obtains the motion state information of access device, comprising:
Receive the state information of described access device broadcasting;
If determine that according to described state information described access device is kept in motion, the query requests that then sends the movable information of inquiring about described access device is to described access device;
Receive the described movable information that described access device returns according to described query requests.
5. method according to claim 1, it is characterized in that, obtain the motion state information of access device, comprising: the broadcast that receives described access device, extract the described motion state information of carrying in the described broadcast, described motion state information comprises state information and movable information.
6. method according to claim 5 is characterized in that, the described described motion state information of obtaining access device comprises:
Obtain the probe request message of motion state information to neighboring area broadcasting;
Receive the probe response message that described access device returns according to described probe request message, comprise the information of described motion state information in the described probe response message.
7. the method that terminal equipment switches between access device is characterized in that, described method comprises:
Access device obtains the current state of described access device;
Notify terminal equipment in the described access device overlay area with the motion state information of described current state correspondence.
8. method according to claim 7 is characterized in that, notifies the described motion state information of the terminal equipment in the described access device overlay area to comprise state information;
And after access device obtained the current state of described access device, described method also comprised:
Described access device determines whether current state is motion state;
If determine that the result is for being then to obtain the movable information of described access device;
And in described motion state information, carry movable information.
9. method according to claim 7 is characterized in that, when the motion state information of the described current state correspondence of obtaining is motion state, and with after the terminal equipment in the described access device of the described state information notification overlay area, described method also comprises:
Receive the query requests of the movable information of the described access device of inquiry that described terminal equipment sends;
According to described query requests described movable information is sent to described terminal equipment.
10. method according to claim 7 is characterized in that, before the terminal equipment of the motion state information of described current state correspondence being notified in the described access device overlay area, described method comprises:
Described access device receives the probe request message that described terminal equipment sends;
According to described probe request message, described motion state information is carried at probe response message is sent to described terminal equipment.
11. method according to claim 8 is characterized in that, described access device determines that current state is a motion state, comprising:
Described access device determines that according to the change in location information of the described access device that obtains from affiliated current network the current state of described access device is a motion state; Perhaps
Described access device determines that according to the current movable information that obtains from motion detection apparatus the current state of described access device is a motion state.
12. a terminal equipment is characterized in that, described terminal equipment comprises:
Scanning element, described scanning element are used to scan the access device that access service can be provided;
Information acquisition unit is used to obtain the motion state information of access device;
Selected cell, described selected cell are used for motion state information and the relevant information select target access device according to the described access device that obtains;
Switch unit, described switch unit are used for described terminal equipment is switched to the target access device from current access device.
13. terminal equipment according to claim 12 is characterized in that, described motion state information comprises described state information; Described selected cell comprises:
First status determining unit is used for determining according to described state information the motion state of described access device;
The target selection unit is used for when described first status determining unit determines that the motion state of described access device is static, according to described relevant information select target access device; When the motion state of determining described access device according to described first state information is motion, according to described movable information and relevant information select target access device.
14. terminal equipment according to claim 12 is characterized in that, described information acquisition unit comprises:
First receiving element is used to receive the state information that described access device is broadcasted;
Second status determining unit is used for determining according to the described state information that described first receiving element receives whether described access device is kept in motion;
The query requests transmitting element is used for sending the query requests of the movable information of inquiring about described access device to described access device when described second status determining unit determines that described access device is kept in motion;
Second receiving element is used to receive the described movable information that described access device returns according to described query requests.
15. terminal equipment according to claim 12 is characterized in that, described information acquisition unit comprises:
Probe requests thereby transmitting element, described probe requests thereby transmitting element are used for obtaining to neighboring area broadcasting the probe request message of described motion state information;
The 3rd receiving element is used to receive the probe response message of carrying described motion state information that described access device returns according to described probe requests thereby.
16. terminal equipment according to claim 12 is characterized in that, described information acquisition unit specifically is used to receive the broadcast of described access device, extracts the described motion state information of carrying in the described broadcast.
17. an access device is characterized in that, described access device comprises:
Status determining unit is used for determining the current state of described access device;
Notification unit is used for notifying terminal equipment in the described access device overlay area with the motion state information of described current state correspondence.
18. access device according to claim 17 is characterized in that, described motion state information comprises state information;
Described access device also comprises:
The movable information acquiring unit is used for obtaining the movable information of described access device when described status determining unit determines that current state is motion state;
And described notification unit notifies the described motion state information of the terminal equipment in the described access device overlay area also to comprise movable information.
19. access device according to claim 17 is characterized in that, described access device also comprises:
The query requests receiving element, be used for determining that in described status determining unit described state information is a motion state, and described notification unit with the terminal equipment in the described access device of the described state information notification overlay area after, receive the query requests of the movable information of the described access device of inquiry that described terminal equipment sends;
First transmitting element is used for according to described query requests described movable information being sent to described terminal equipment.
20. access device according to claim 17 is characterized in that, described access device also comprises:
The probe requests thereby receiving element was used for before described notification unit is notified described terminal equipment with described motion state information, received the probe request message of obtaining described motion state information that described terminal equipment sends;
Second transmitting element is used for according to described probe request message described motion state information being carried at probe response message and is sent to described terminal equipment.
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| CN2009101713043A CN101631367B (en) | 2009-08-21 | 2009-08-21 | Method for switching terminal equipment among access equipment, access equipment and terminal equipment |
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| CN2009101713043A CN101631367B (en) | 2009-08-21 | 2009-08-21 | Method for switching terminal equipment among access equipment, access equipment and terminal equipment |
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| CN101631367A true CN101631367A (en) | 2010-01-20 |
| CN101631367B CN101631367B (en) | 2012-07-04 |
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| JP2006074322A (en) * | 2004-09-01 | 2006-03-16 | Nec Corp | Base station, mobile station and control method of transmission power |
| FR2897499A1 (en) * | 2006-02-13 | 2007-08-17 | France Telecom | METHOD FOR ALLOCATING AT LEAST ONE ACCESS POINT TO A MOBILE TERMINAL, IN A CELLULAR NETWORK, TERMINAL, MOBILITY SERVER AND CORRESPONDING PROGRAM |
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| CN105827668B (en) * | 2015-01-04 | 2019-10-25 | 海尔优家智能科技（北京）有限公司 | The connection method and system of thin client device and access device |
| CN105827668A (en) * | 2015-01-04 | 2016-08-03 | 北京海尔广科数字技术有限公司 | Connecting method and connecting system for thin client device and access device |
| CN106507394A (en) * | 2016-11-15 | 2017-03-15 | 杭州华三通信技术有限公司 | Data transmission method for uplink, data receiver method and electronic equipment, access point |
| CN108601052A (en) * | 2018-04-04 | 2018-09-28 | 天地融科技股份有限公司 | A kind of wireless network switching method |
| CN108632935A (en) * | 2018-04-04 | 2018-10-09 | 天地融科技股份有限公司 | A kind of WIFI network switching method |
| CN108601052B (en) * | 2018-04-04 | 2020-02-21 | 天地融科技股份有限公司 | Wireless network switching method |
| CN111212458A (en) * | 2018-11-21 | 2020-05-29 | 中国电信股份有限公司 | Wireless network access management method and device |
| CN112165707A (en) * | 2020-09-23 | 2021-01-01 | 北京蓦然认知科技有限公司 | Beacon sending method and device |
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