CN105101150A - Wireless terminal roaming method and device - Google Patents
Wireless terminal roaming method and device Download PDFInfo
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Abstract
The invention discloses a wireless terminal roaming method. The method includes the steps: scanning APs (access point) nearby and obtaining a selectable AP set if the RSSI (received signal strength indication) value of an AP connected to a wireless terminal is smaller than a preset threshold; and determining a roaming AP on the basis of the selectable AP set and an equivalent AP set stored locally, and roaming to the determined roaming AP. On the basis of the same invention idea, the invention also provides an apparatus. In this way, continuity of services is kept without frequent switching.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of wireless terminal roaming method and apparatus.
Background technology
Large-scale WLAN (WLAN) is generally made up of wireless controller (AccessController, AC), multiple stage WAP (wireless access point) (AccessPoint, AP) and a large amount of wireless terminal (STA).The general service set identifier (ServiceSetIdentifier, SSID) that all outwards broadcast is identical of these AP, makes STA can find this SSID and connect.When STA determines to connect this SSID, STA can select from numerous AP one it think that most suitable AP connects, the AP that usually selection signal strength signal intensity is maximum.After successful connection, STA gets final product visited WLAN.
When STA moves, STA can change with the signal strength signal intensity of the AP be previously connected.Along with the distance between STA and AP is more and more far away, signal strength signal intensity can become more and more lower.When signal strength signal intensity is enough low, if also have other AP to exist around STA, the AP that STA again can select signal good in these AP reconnects, and this process is called roaming.
The following two kinds is had by the mode of the roaming of STA ACTIVE CONTROL WLAN:
The first, the AP near STA periodic scanning STA, when finding that the signal strength signal intensity of certain contiguous AP is greater than the AP of current connection, then initiatively switches and is connected to the high AP of signal strength signal intensity.
When the close AP of signal appears there emerged a nearby in this implementation, terminal can ceaselessly repeatedly switch when mobile between multiple AP.
The second, when STA moves, can keep connecting with the current AP that is connected always, until the pickup electrode of the AP of current connection is low or disappear, then switch, this implementation can not keep the continuity of business.
Summary of the invention
In view of this, the invention provides a kind of wireless terminal roaming method and apparatus, do not carrying out, on the frequent basis switched, keeping the continuity of business.
For solving the problems of the technologies described above, technical scheme of the present invention is achieved in that
A kind of wireless terminal roaming method, described method comprises:
The Equivalent A P group that wireless terminal reception is broadcasted to AC also stores, and wherein, described Equivalent A P group is AC is the Equivalent A P group that this AP sets up according to the information that each AP reports, and this equivalent AP group comprises the AP that RSSI value that this AP and this AP reports is not less than the first preset value;
When the RSSI value of the AP that this wireless terminal connects is less than predetermined threshold value, the AP of scanning neighboring, and obtain optional AP and gather;
Determine to roam AP according to this optional AP set and the local Equivalent A P group stored;
Disconnect the AP of current connection, and connect the roaming AP determined.
A kind of wireless terminal roaming method, described method comprises:
When AC receives the information of its contiguous AP that each AP in WLAN sends, for each AP sets up Equivalent A P group respectively, the AP that RSSI value that this AP and this AP reports is not less than the first preset value is comprised for its Equivalent A P group of arbitrary AP;
The all Equivalent A P groups set up are broadcast to each wireless terminal in this WLAN, make each wireless terminal when the RSSI value of the AP connected is less than predetermined threshold value, determine roaming AP according to Equivalent A P group and roam.
A kind of device, can be applicable on wireless terminal, this device comprises: receive memory cell, scanning acquiring unit, determining unit and processing unit;
Described reception memory cell, for receiving the Equivalent A P group of AC broadcast and storing, wherein, described Equivalent A P group is AC according to the information that each AP reports is the Equivalent A P group that this AP sets up, and this equivalent AP group comprises the AP that RSSI value that this AP and this AP reports is not less than the first preset value;
Described scanning acquiring unit, for when the RSSI value of the AP that this device connects is less than predetermined threshold value, the AP of scanning neighboring, and obtain optional AP and gather;
Described determining unit, the Equivalent A P group that the optional AP for obtaining according to described scanning acquiring unit gathers and described memory cell this locality stores is determined to roam AP;
Described processing unit, for disconnecting the AP of current connection, and connects the roaming AP that described determining unit determines.
A kind of device, can be applicable on AC, this device comprises: receiving element, processing unit and transmitting element;
Described receiving element, the information of its contiguous AP that each AP for receiving in WLAN sends;
Described processing unit, during the information of its contiguous AP that each AP for receiving when described receiving element in WLAN sends, for each AP sets up Equivalent A P group respectively, the AP that RSSI value that this AP and this AP reports is not less than the first preset value is comprised for its Equivalent A P group of arbitrary AP;
Described transmitting element, all Equivalent A P groups for being set up by described processing unit are broadcast to each wireless terminal in this WLAN, make each wireless terminal when the RSSI value of the AP connected is less than predetermined threshold value, determine roaming AP and roam according to Equivalent A P group.
In sum, when the RSSI value of the AP that the present invention is connected by wireless terminal is less than predetermined threshold value, the AP of scanning neighboring also obtains optional AP and gathers; Determine to roam AP according to this optional AP set and the local Equivalent A P group stored, and roam into this roaming AP determined, can not carry out, on the frequent basis switched, keeping the continuity of business.
Accompanying drawing explanation
It is AP networking schematic diagram in Fig. 1;
Fig. 2 is the schematic flow sheet of wireless terminal when roaming in the specific embodiment of the invention;
Fig. 3 is the structural representation being applied to the device on wireless terminal in the specific embodiment of the invention;
Fig. 4 is the structural representation being applied to the device on AC in the specific embodiment of the invention.
Embodiment
For making object of the present invention, technical scheme and advantage clearly understand, to develop simultaneously embodiment referring to accompanying drawing, scheme of the present invention is described in further detail.
A kind of wireless terminal roaming method is proposed in the embodiment of the present invention, received signal strength indicator (the ReceivedSignalStrengthIndication of the AP that wireless terminal connects, RSSI), when value is less than predetermined threshold value, the AP of scanning neighboring also obtains optional AP and gathers; Determine to roam AP according to this optional AP set and the local Equivalent A P group stored, and roam into this roaming AP determined, do not carrying out, on the frequent basis switched, keeping the continuity of business.
Be made up of AC, a multiple stage AP and a large amount of STA in a WLAN (wireless local area network) (WLAN).Each its contiguous AP of AP meeting periodic scanning, and the information of being close to AP passes through communication mechanism between AC-AP, as wireless access point control and supply (ControllingandProvisioningofWirelessAccessPoint, or Lightweight Access Point Protocol (LightweightAccessPointProtocol CAPWAP), LWAPP), AC is reported.The information of the AP reported comprises: BSSID (BasicServiceSetIdentifier, and RSSI value BSSID), wherein BSSID is the unique identification of each AP, RSSI value is the signal strength values reporting AP to receive other AP, as AP1 reports the RSSI value of AP2, namely the information that AP1 reports comprises the BSSID of AP2, and AP1 receives the signal strength values RSSI value of AP2, for convenience the hereafter all similar RSSI value being referred to as AP2.
AC can set up an Equivalent A P group for each AP after receiving the information of the contiguous AP that all AP in this WLAN send.This equivalent AP group comprises this AP, and RSSI value is not less than the AP of the first preset value; And the priority of each AP is calculated according to the load of each AP.May be that overlapped, all Equivalent A P group constitutes whole net Equivalent A P group between Equivalent A P group.
See in Fig. 1, Fig. 1 being AP networking schematic diagram.Totally 7 AP (AP1-AP7) in wlan network in Fig. 1, due to an Equivalent A P group can be set up for each AP, therefore, in this wlan network, set up 7 Equivalent A P groups (Equivalent A P group 1 is to Equivalent A P group 7), these 7 Equivalent A P groups constitute the whole net Equivalent A P group of this wlan network.
Think that the Equivalent A P group 4 that AP4 sets up is example, Equivalent A P group 4 comprises AP4, AP3, AP5.This illustrates the information of other AP that AP4 reports, and at least comprise the information of AP3 and AP5, wherein, the RSSI value of AP3 and AP5 is not less than the first preset value.Here the first preset value can, according to practical application concrete configuration, make the little each AP of the signal strength difference contiguous with certain AP form an Equivalent A P group to reach.
AC is that all AP establish Equivalent A P group, and calculates the priority of each AP according to the load of each AP, and the larger priority of load of AP is less.
For an Equivalent A P group, the AP that its medium priority is the highest is preferentially chosen as the AP that will access.
When specific implementation, can be that each AP records priority in Equivalent A P group, also can being that each Equivalent A P sets up a vertical preferred AP list, for recording the priority of each AP in this equivalent AP group, can also each AP's height according to priority being sorted.
The priority of each AP, and the Equivalent A P group of AP can periodic refreshing, the information namely reported according to AP timing re-starts calculating; Also can be refreshed by event; As AP reports load variations; Or wireless terminal sends notice, it is desirable to change AP etc.
Load variations is reported initiatively to trigger recalculating of AP priority for AP, specific as follows:
The load of self is reported AC by AP;
When AC receives the load of this AP transmission, recalculate the priority of this AP; If the priority of this AP changes, being then broadcast to each wireless terminal, making wireless terminal when roaming, roaming into which AP for determining; If the priority of this AP does not change, then again do not broadcast the priority of this AP to each wireless terminal.
Set up as the Equivalent A P of each AP and stood, and after the priority of each AP calculated, these information are gathered the wireless terminal sent in this wlan network.Owing to wishing that each wireless terminal uses these information tables to carry out terminal access and terminal roaming, therefore, AC can adopt the mode of broadcast that information is sent to all wireless terminals.
The Equivalent A P group that wireless terminal reception is broadcasted to AC, and during the priority of AP, store in this locality.When again receiving Equivalent A P and/or the priority of AP of AC broadcast, upgrade the priority of the local Equivalent A P group that stores and/or AP.
Be the schematic flow sheet of wireless terminal when roaming in the specific embodiment of the invention see Fig. 2, Fig. 2.Concrete steps comprise:
Step 201, when the RSSI value of AP that wireless terminal connects is less than predetermined threshold value, the AP of scanning neighboring, and obtain optional AP and gather.
Predetermined threshold value in this step can according to practical application concrete configuration, and as carried out predetermined threshold value configuration according to the following rules: when the RSSI value of this AP is less than this predetermined threshold value, wireless terminal business can also keep continuous, but wishes to roam into the better AP of signal.
In the present embodiment, wireless terminal is when the AP connected is less than predetermined threshold value, initiatively initiates roaming, waiting signal disappearance just can not roam, maintains the continuity of business.
The RSSI value of the AP that wireless terminal is understood in real time or periodic detection connects, once find that the RSSI value of this AP is less than predetermined threshold value, then starts the function of scanning neighboring AP.
AP in the optional AP set obtained in this step is that in the AP that scans of this wireless terminal, RSSI value is not less than the second preset value, and the AP not in the Equivalent A P group that the AP of current connection is corresponding.
The concrete deterministic process obtaining optional AP set is as follows:
The first step, the AP of wireless terminal scanning neighboring, obtains contiguous AP set, and the contiguous AP set as obtained is { AP1, AP2, AP3, AP4 ...;
Second step, the AP that RSSI value in contiguous AP set is not less than the second preset value retains by this wireless terminal, and the AP being not more than the second preset value by RSSI value deletes;
3rd step, the contiguous AP after the AP identical with the current corresponding Equivalent A P group of the AP of current connection during this vicinity AP gathers deletes gathers and gathers as optional AP by this wireless terminal.
The RSSI value that wireless terminal works as AP connection being detected is not less than predetermined threshold value, and when in the Equivalent A P group of the current correspondence of AP connected, the RSSI value of other AP is greater than the RSSI value of the AP of current connection, the connection of maintenance and the current AP be connected, does not namely roam.
When wireless terminal among a small circle mobile (moving in an Equivalent A P group) or because of environmental change cause RSSI value be slightly change time, wireless terminal remains the connection with selected AP, repeatedly can not switch between several AP.
Wherein, the Equivalent A P group that the AP of above-mentioned current connection is corresponding is exactly when determining current connection AP, the Equivalent A P group at AP place.Be appreciated that, the Equivalent A P group that the AP of current connection described herein is corresponding, might not be equal to AC is the Equivalent A P group that this AP sets up, this is because when selecting this AP as the AP connected, Equivalent A P group as this AP of selection may be again equivalent group of this AP that AC sets up, also be likely the Equivalent A P group of other AP that the AC comprising this AP sets up, therefore, the Equivalent A P group that AP described by this one end of wireless terminal is corresponding, represent and select this AP when roaming AP, finally to determine to select in this Equivalent A P group.
As determine when this wireless terminal local exist to gather the identical Equivalent A P group of the AP comprised with this optional AP time, determine that the AP that this equivalent AP group medium priority is the highest is roaming AP, then optional AP gathers the identical Equivalent A P group of the AP comprised with this, be the Equivalent A P group that this roaming AP is corresponding, AC end is when setting up this equivalent AP group, be not necessarily that this roaming AP sets up, for Equivalent A P group also not necessarily this equivalent AP group that this roaming AP sets up, therefore, the Equivalent A P group that AC holds the Equivalent A P group of AP corresponding with wireless terminal AP is without any relation, this has corresponding explanation when determining roaming AP below.
Step 202, this wireless terminal is determined to roam AP according to this optional AP set and the local Equivalent A P group stored.
Determine in this step that the method roaming AP is specially:
This wireless terminal determines local whether there is optional AP with this and gather the identical Equivalent A P group of the AP comprised, and if so, determines that the AP that this equivalent AP group medium priority is the highest roams AP, and to record this equivalent AP group be the Equivalent A P group that this roaming AP is corresponding; Otherwise, determine to gather with optional AP the Equivalent A P group that the number that comprises identical AP is maximum, and all exist in the Equivalent A P group selecting this to determine and this optional AP set, and the maximum AP of priority is as roaming AP, recording this Equivalent A P group determined is the Equivalent A P group that this roaming AP is corresponding; Wherein, the priority of described AP is that AC calculates according to the load of each AP and is broadcast to this wireless terminal.
When this wireless terminal determines to gather with optional AP maximum more than 1 of the Equivalent A P group of the number that comprises identical AP, use described each Equivalent A P group of determining and optional AP to gather respectively to determine and to be selectedly roam AP, the AP selecting the roaming AP medium priority to be selected determined the highest is as roaming AP; And the Equivalent A P group of the roaming AP to be selected that priority is the highest determined in record, as the Equivalent A P group that this roaming AP is corresponding.
As more than one of the AP that roaming AP medium priority to be selected is the highest, Stochastic choice AP is as roaming AP; And an Equivalent A P group of Stochastic choice in the Equivalent A P group of the roaming AP to be selected that priority is the highest determined in record, as the Equivalent A P group that this roaming AP is corresponding.
When this wireless terminal determines roaming AP, record the Equivalent A P group that this roaming AP is corresponding, when this wireless terminal roaming is to this roaming AP, the RSSI value of this roaming AP is not less than predetermined threshold value, and when in the Equivalent A P group of the current correspondence of AP connected, the RSSI value of other AP is greater than the RSSI value of roaming AP of current connection, keep the connection with the current roaming AP be connected, namely maintain the initial AP connected in an Equivalent A P group.
Because wireless terminal in the specific embodiment of the invention is when selecting roaming AP, with reference to the priority of AP, and the priority of AP calculates acquisition by the load of AP, therefore, a large amount of wireless terminal there will not be the situation being all connected to same AP when the same area, wireless terminal can be evenly distributed on all AP in this region.
Step 203, this wireless terminal disconnects the AP of current connection, and connects the roaming AP determined.
Above-detailed wireless terminal has accessed certain AP, when RSSI value is less than predetermined threshold value, determines the detailed process of the roaming AP that will roam into.
When wireless terminal initially accesses WLAN, scanning neighboring AP, and access the AP that in the contiguous AP that scans, RSSI value is maximum and access.
When the Equivalent A P group that this wireless terminal reception is broadcasted to AC, and in Equivalent A P group during the priority of each AP, in each Equivalent A P group at this wireless terminal place, the Equivalent A P group at the AP place selecting priority maximum, is recorded as the Equivalent A P group that the AP of current connection is corresponding.
Based on same inventive concept, also propose a kind of device in the specific embodiment of the invention, can be applicable on wireless terminal.It is the structural representation being applied to the device on wireless terminal in the specific embodiment of the invention see Fig. 3, Fig. 3.This device comprises: receive memory cell 301, scanning acquiring unit 302, determining unit 303 and processing unit 304.
Receive memory cell 301, for receiving the Equivalent A P group of AC broadcast and storing, wherein, described Equivalent A P group is AC according to the information that each AP reports is the Equivalent A P group that this AP sets up, and this equivalent AP group comprises the AP that RSSI value that this AP and this AP reports is not less than the first preset value;
Scanning acquiring unit 302, for when the RSSI value of the AP that this device connects is less than predetermined threshold value, the AP of scanning neighboring, and obtain optional AP and gather;
Determining unit 303, the Equivalent A P group that the optional AP for obtaining according to scanning acquiring unit 302 gathers and reception memory cell 301 this locality stores is determined to roam AP;
Processing unit 304, for disconnecting the AP of current connection, and connects the roaming AP that determining unit 303 determines.
Preferably,
Determining unit 303, specifically for determining whether this locality exists optional AP with this and gather the identical Equivalent A P group of the AP comprised, if so, determines that the AP that this equivalent AP group medium priority is the highest is roaming AP; Otherwise, determines to gather with optional AP the Equivalent A P group that the number that comprises identical AP is maximum, and all exist in the Equivalent A P group selecting this to determine and this optional AP set, and the maximum AP of priority is as roaming AP; Wherein, the priority of described AP is that AC calculates according to the load of each AP and is broadcast to this wireless terminal.
Preferably,
Determining unit 303, specifically for when determining to gather with optional AP maximum more than 1 of the Equivalent A P group of the number that comprises identical AP, use described each Equivalent A P group of determining and optional AP to gather respectively to determine and to be selectedly roam AP, the AP selecting the roaming AP medium priority to be selected determined the highest is as roaming AP; As more than one of the AP that roaming AP medium priority to be selected is the highest, Stochastic choice AP is as roaming AP.
Preferably,
Receive memory cell 301, be further used for when this device is connected to an AP, record the Equivalent A P group of the current correspondence of this AP;
Processing unit 304, the RSSI value be further used for as AP connection being detected is not less than predetermined threshold value, and when the RSSI value of other AP is greater than the RSSI value of the AP of current connection in the Equivalent A P group of the current correspondence of AP connected, keeps the connection with the current AP be connected.
Preferably, the AP in described optional AP set is that in the AP that scans of this wireless terminal, RSSI value is not less than the second preset value, and the AP not in the Equivalent A P group of the current correspondence of AP connected.
Based on same inventive concept, the specific embodiment of the invention also proposes a kind of device, can be applicable on AC.It is the structural representation being applied to the device on AC in the specific embodiment of the invention see Fig. 4, Fig. 4.This device comprises: receiving element 401, processing unit 402 and transmitting element 403;
Receiving element 401, the information of its contiguous AP that each AP for receiving in WLAN sends;
Processing unit 402, during the information of its contiguous AP that each AP for receiving when receiving element 401 in WLAN sends, for each AP sets up Equivalent A P group respectively, the AP that RSSI value that this AP and this AP reports is not less than the first preset value is comprised for its Equivalent A P group of arbitrary AP;
Transmitting element 403, all Equivalent A P groups for being set up by processing unit 402 are broadcast to each wireless terminal in this WLAN, make each wireless terminal when the RSSI value of the AP connected is less than predetermined threshold value, determine roaming AP and roam according to Equivalent A P group.
Preferably,
Receiving element 401, is further used for receiving the load of self that each AP reports;
Processing unit 402, is further used for, when receiving element 401 receives the load of self that each AP reports, calculating the priority of each AP according to the load of each AP;
Transmitting element 403, further when to each wireless terminal broadcast Equivalent A P group, the priority of each AP that broadcasting process unit 402 calculates.
Preferably,
Receiving element 401, is further used for the load that reception AP reports;
Processing unit 402; Be further used for when receiving element 401 receive arbitrary AP due to load change the load of active reporting self time, recalculate the priority of this AP according to the load reported;
Transmitting element 403, if the priority being further used for this AP changes, then the priority broadcast of this AP recalculated by processing unit 402 gives each wireless terminal.
The unit of above-described embodiment can be integrated in one, and also can be separated deployment; A unit can be merged into, also can split into multiple subelement further.
In sum, when the RSSI value of AP that in the specific embodiment of the invention, wireless terminal connects is less than predetermined threshold value, the AP of scanning neighboring also obtains optional AP and gathers; Determine to roam AP according to this optional AP set and the local Equivalent A P group stored, and roam into this roaming AP determined, do not carrying out, on the frequent basis switched, keeping the continuity of business.
Because wireless terminal in the specific embodiment of the invention is when selecting roaming AP, with reference to the priority of AP, and the priority of AP calculates acquisition by the load of AP, therefore, a large amount of wireless terminal there will not be the situation being all connected to same AP when the same area, wireless terminal can be evenly distributed on all AP in this region.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. a wireless terminal roaming method, is characterized in that, described method comprises:
The equivalent access point AP group that wireless terminal reception is broadcasted to access controller AC also stores, wherein, described Equivalent A P group is AC according to the information that each AP reports is the Equivalent A P group that this AP sets up, and this equivalent AP group comprises the AP that received signal strength indicator RSSI value that this AP and this AP reports is not less than the first preset value;
When the RSSI value of the AP that this wireless terminal connects is less than predetermined threshold value, the AP of scanning neighboring, and obtain optional AP and gather;
Determine to roam AP according to this optional AP set and the local Equivalent A P group stored;
Disconnect the AP of current connection, and connect the roaming AP determined.
2. method according to claim 1, is characterized in that, the described Equivalent A P group according to this optional AP set and local storage is determined to roam AP, comprising:
Determine whether this locality exists optional AP with this and gather the identical Equivalent A P group of the AP comprised, if so, determine that the AP that this equivalent AP group medium priority is the highest is roaming AP; Otherwise, determines to gather with optional AP the Equivalent A P group that the number that comprises identical AP is maximum, and all exist in the Equivalent A P group selecting this to determine and this optional AP set, and the maximum AP of priority is as roaming AP; Wherein, the priority of described AP is that AC calculates according to the load of each AP and is broadcast to this wireless terminal.
3. method according to claim 2, is characterized in that, described method comprises further:
When determining to gather with optional AP maximum more than 1 of the Equivalent A P group of the number that comprises identical AP, use described each Equivalent A P group of determining and optional AP to gather respectively to determine and to be selectedly roam AP, the AP selecting the roaming AP medium priority to be selected determined the highest is as roaming AP;
As more than one of the AP that roaming AP medium priority to be selected is the highest, Stochastic choice AP is as roaming AP.
4. the method according to claim 1-3 any one, is characterized in that, described method comprises further:
When this wireless terminal is connected to arbitrary AP, record the Equivalent A P group of the current correspondence of this AP;
When the RSSI value of AP connection being detected is not less than predetermined threshold value, and when the RSSI value of other AP is greater than the RSSI value of the AP of current connection in the Equivalent A P group of the current correspondence of AP connected, keep the connection with the current AP be connected.
5. method according to claim 4, is characterized in that, the AP in described optional AP set is that in the AP that scans of this wireless terminal, RSSI value is not less than the second preset value, and the AP not in the Equivalent A P group of the current correspondence of AP connected.
6. a wireless terminal roaming method, is characterized in that, described method comprises:
When wireless controller AC receives the information of its contiguous AP that each wireless access point AP in WLAN (wireless local area network) WLAN sends, for each AP sets up Equivalent A P group respectively, the AP that received signal strength indicator RSSI value that this AP and this AP reports is not less than the first preset value is comprised for its Equivalent A P group of arbitrary AP;
The all Equivalent A P groups set up are broadcast to each wireless terminal in this WLAN, make each wireless terminal when the RSSI value of the AP connected is less than predetermined threshold value, determine roaming AP according to Equivalent A P group and roam.
7. method according to claim 6, is characterized in that, described method comprises further:
When this AC receives the load of self that each AP reports, calculate the priority of each AP according to the load of each AP; And when to each wireless terminal broadcast Equivalent A P group, the priority of each AP that broadcast calculates.
8. method according to claim 7, is characterized in that, described method comprises further:
This AC receive arbitrary AP due to load change the load of active reporting self time, recalculate the priority of this AP according to the load reported; If the priority of this AP changes, then by the priority broadcast of this AP that recalculates to each wireless terminal.
9. a device, can be applicable to, on wireless terminal, it is characterized in that, this device comprises: receive memory cell, scanning acquiring unit, determining unit and processing unit;
Described reception memory cell, for receiving the equivalent wireless access point AP group of wireless controller AC broadcast and storing, wherein, described Equivalent A P group is AC according to the information that each AP reports is the Equivalent A P group that this AP sets up, and this equivalent AP group comprises the AP that received signal strength indicator RSSI value that this AP and this AP reports is not less than the first preset value;
Described scanning acquiring unit, for when the RSSI value of the AP that this device connects is less than predetermined threshold value, the AP of scanning neighboring, and obtain optional AP and gather;
Described determining unit, the Equivalent A P group that the optional AP for obtaining according to described scanning acquiring unit gathers and described reception memory cell this locality stores is determined to roam AP;
Described processing unit, for disconnecting the AP of current connection, and connects the roaming AP that described determining unit determines.
10. device according to claim 9, is characterized in that,
Described determining unit, specifically for determining whether this locality exists optional AP with this and gather the identical Equivalent A P group of the AP comprised, if so, determines that the AP that this equivalent AP group medium priority is the highest is roaming AP; Otherwise, determines to gather with optional AP the Equivalent A P group that the number that comprises identical AP is maximum, and all exist in the Equivalent A P group selecting this to determine and this optional AP set, and the maximum AP of priority is as roaming AP; Wherein, the priority of described AP is that AC calculates according to the load of each AP and is broadcast to this wireless terminal.
11. devices according to claim 10, is characterized in that,
Described determining unit, specifically for when determining to gather with optional AP maximum more than 1 of the Equivalent A P group of the number that comprises identical AP, use described each Equivalent A P group of determining and optional AP to gather respectively to determine and to be selectedly roam AP, the AP selecting the roaming AP medium priority to be selected determined the highest is as roaming AP; As more than one of the AP that roaming AP medium priority to be selected is the highest, Stochastic choice AP is as roaming AP.
12. devices according to claim 9-11 any one, is characterized in that,
Described reception memory cell, is further used for when this device is connected to an AP, records the Equivalent A P group of the current correspondence of this AP;
Described processing unit, the RSSI value be further used for as AP connection being detected is not less than predetermined threshold value, and when the RSSI value of other AP is greater than the RSSI value of the AP of current connection in the Equivalent A P group of the current correspondence of AP connected, keeps the connection with the current AP be connected.
13. devices according to claim 12, is characterized in that, the AP in described optional AP set is that in the AP that scans of this wireless terminal, RSSI value is not less than the second preset value, and the AP not in the Equivalent A P group of the current correspondence of AP connected.
14. 1 kinds of devices, can be applicable to, on wireless controller AC, it is characterized in that, this device comprises: receiving element, processing unit and transmitting element;
Described receiving element, the information of its contiguous AP that each wireless access point AP for receiving in WLAN (wireless local area network) WLAN sends;
Described processing unit, during the information of its contiguous AP that each AP for receiving when described receiving element in WLAN sends, for each AP sets up Equivalent A P group respectively, the AP that received signal strength indicator RSSI value that this AP and this AP reports is not less than the first preset value is comprised for its Equivalent A P group of arbitrary AP;
Described transmitting element, all Equivalent A P groups for being set up by described processing unit are broadcast to each wireless terminal in this WLAN, make each wireless terminal when the RSSI value of the AP connected is less than predetermined threshold value, determine roaming AP and roam according to Equivalent A P group.
15. devices according to claim 14, is characterized in that,
Described receiving element, is further used for receiving the load of self that each AP reports;
Described processing unit, is further used for, when described receiving element receives the load of self that each AP reports, calculating the priority of each AP according to the load of each AP;
Described transmitting element, is further used for, when to each wireless terminal broadcast Equivalent A P group, broadcasting the priority of each AP that described processing unit calculates.
16. devices according to claim 15, is characterized in that,
Described receiving element, is further used for the load that reception AP reports;
Described processing unit; Be further used for when described receiving element receive arbitrary AP due to load change the load of active reporting self time, recalculate the priority of this AP according to the load reported;
Described transmitting element, if the priority being further used for this AP changes, then the priority broadcast of this AP recalculated by described processing unit gives each wireless terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN106686626B (en) * | 2016-12-07 | 2019-04-26 | Oppo广东移动通信有限公司 | The setting method and terminal device of WiFi roaming |
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