CN104125623A - Wireless local area network discovery method, controller, user equipment and network access equipment - Google Patents

Wireless local area network discovery method, controller, user equipment and network access equipment Download PDF

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Publication number
CN104125623A
CN104125623A CN201310155545.5A CN201310155545A CN104125623A CN 104125623 A CN104125623 A CN 104125623A CN 201310155545 A CN201310155545 A CN 201310155545A CN 104125623 A CN104125623 A CN 104125623A
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China
Prior art keywords
network access
equipment
subscriber equipment
information
message
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CN201310155545.5A
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CN104125623B (en
Inventor
张兴新
王学寰
阳建军
夏林峰
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Honor Device Co Ltd
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Huawei Technologies Co Ltd
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Abstract

Embodiments of the invention provide a wireless local area network discovery method, a controller, user equipment and network access equipment. The method comprises the following steps that a scanning trigger message is generated, the scanning trigger message carries a scanning mode and the scanning mode is an active scanning mode or a passive scanning mode; the scanning trigger message is sent to the user equipment so that the user equipment carries out scanning on at least one network access equipment of the wireless local area network (WLAN) according to the scanning mode, signaling storm which is generated when a plurality of user equipment actively scans and carries out wireless local area network discovery is avoided so that network congestion is not caused. For the user equipment which does not support Wi-Fi measurement or possesses low measurement precision, the user equipment can be set to only adopt the active scanning mode. Wi-Fi measurement work is executed by the network access equipment. A condition that the user equipment which does not support Wi-Fi measurement or possesses the low measurement precision can not carry out effective wireless local area network discovery is avoided.

Description

WLAN (wireless local area network) discover method, controller, subscriber equipment and network access equipment
Technical field
The embodiment of the present invention relates to wireless communication field, relates in particular to a kind of WLAN (wireless local area network) discover method, controller, subscriber equipment and network access equipment.
Background technology
Subscriber equipment (User Equipment, be called for short UE) employing Wireless Fidelity (Wireless Fidelity, abbreviation Wi-Fi) technology and WAP (wireless access point) (Access Point is called for short AP) connect with accessing WLAN (Wireless Local Area is called for short WLAN).Concrete, the built-in Wi-Fi module of UE, is access WLAN, and whether UE has available WLAN near first needing to find by scanning, and scan mode is divided into two kinds: active scan and drive sweep.When using active scan, UE sends probe request (Probe Request) by Wi-Fi module, and whether the probing response frame (Probe Response) that reception probe request triggering AP sends exists available WLAN near surveying; When using drive sweep, whether the beacon frame that UE periodically sends by Wi-Fi module reception AP (Beacon, 100ms sends once conventionally) has available WLAN near finding.Because wlan network has only covered hotspot range, a lot of places still do not have wlan network to cover, and the wlan network that great majority have been disposed does not support UE to switch between different wlan networks.Therefore,, if allow the Wi-Fi module of UE always in opening, even if do not having under the state of business, whether the Wi-Fi module of UE there is wlan network near can often detecting, and causes the power consumption of UE higher, reduces standby time.But, if the Wi-Fi module of UE is closed, lost so again the chance of many discovery wlan networks.
In prior art, for the problems referred to above, controller is when UE being detected and have business, according to UE position information or place cell identity sign (Cell Identity, abbreviation Cell ID) obtain service set (the Service set identifier of candidate AP, be called for short SSID) and be handed down to UE, trigger UE and carry out active scan according to the SSID receiving, in one or more channels, send the probe request of carrying this SSID, each AP corresponding to SSID is after receiving probe request, send probing response frame, UE is by the signal strength signal intensity that measures each AP of probing response frame (Received Signal Strength Indicator, be called for short RSSI), then by the basic service set identification of RSSI and corresponding A P (Basic Service set identifier, abbreviation BSSID) report controller, controller is according to RSSI, select to be applicable to the AP of UE access, BSSID corresponding to the AP selecting is handed down to UE notice UE access.
In the process that above-mentioned AP finds, by the Wi-Fi module of UE, candidate's AP is carried out to active scan.Yet under different network states, applicable scan mode may be different, if a large amount of UE finds AP by active scan mode, may cause signaling storm, cause network congestion.
Summary of the invention
The embodiment of the present invention provides a kind of WLAN (wireless local area network) discover method, controller, subscriber equipment and network access equipment, realize subscriber equipment and utilize suitable scan mode discovering network access device, avoid a large amount of UE all active scan carry out WLAN (wireless local area network) and find to cause signaling storm, cause network congestion.
First aspect, the embodiment of the present invention provides a kind of WLAN (wireless local area network) discover method, comprising:
Generate scanning and trigger message, described scanning triggers message and carries scan pattern, and described scan pattern is active scan mode or drive sweep pattern;
To subscriber equipment, send described scanning and trigger message, so that described subscriber equipment scans at least one network access equipment of WLAN (wireless local area network) WLAN according to described scan pattern.
In the possible implementation of the first aspect first, described method also comprises:
When described scan pattern is active scan mode, to described at least one network access equipment, send active scan response condition information, so that described at least one network access equipment is according to described active scan response condition information, determine whether the objective network access device as described subscriber equipment.
In the possible implementation of the second aspect first, described after subscriber equipment sends described scanning triggering message, also comprise:
Receive metrical information, described metrical information is the first metrical information that the first measuring-signal that described at least one network access equipment sends under described active scan mode for described subscriber equipment measures; Or, described metrical information be described subscriber equipment under described drive sweep pattern, the second metrical information that the second measuring-signal sending for described at least one network access equipment measures;
According to described metrical information, it is described subscriber equipment select target network access equipment;
To described at least one network access equipment, send access indication response message.
In conjunction with the possible implementation of the second of first aspect, in the third the possible implementation aspect first, described according to described metrical information, be described subscriber equipment select target network access equipment, comprising:
According to described metrical information, and at least one information in the state of affairs information of the network state information of described at least one network access equipment, described subscriber equipment, be described subscriber equipment select target network access equipment.
In conjunction with the second or the third possible implementation of first aspect, in the 4th kind of possible implementation aspect first, described method also comprises:
To described subscriber equipment, send access message, described access message is carried the identification information of described objective network access device, so that described subscriber equipment according to described identification information, accesses described objective network access device.
In conjunction with any implementation in four kinds of possible implementations of the first to the of first aspect, first aspect, in the 5th kind of possible implementation aspect first, described scanning triggers message and also carries at least one information in following information: the service set of described at least one network access equipment, basic service set identification, channel.
Second aspect, the embodiment of the present invention provides a kind of WLAN (wireless local area network) discover method, comprising:
Receive the scanning triggering message that controller sends, described scanning triggers message and carries scan pattern, and described scan pattern is active scan mode or drive sweep pattern;
According to described scan pattern, at least one network access equipment of WLAN (wireless local area network) WLAN is scanned.
In the possible implementation of the first aspect second, described method also comprises:
When described scan pattern is described active scan mode, to described at least one network access equipment, send the first measuring-signal, so that described at least one network access equipment measures the first metrical information to described the first measuring-signal.
In the possible implementation of the second aspect second, described method also comprises:
When described scan pattern is described drive sweep pattern, receive the second measuring-signal that described at least one network access equipment sends, described the second measuring-signal is measured to the second metrical information;
To described controller, send described the second metrical information.
In conjunction with the possible implementation of the first of second aspect, in the third the possible implementation aspect second, described method also comprises:
Receive the objective network access device indication information that described at least one network access equipment sends, described objective network access device indication information be described at least one network access equipment according to the active scan response condition information and described the first metrical information that receive, determining can be as sending after objective network access device.
In conjunction with the first or the possible implementation of the second of second aspect, in the 4th kind of possible implementation aspect second, described method also comprises:
Receive the access message that described controller sends, described access message is carried the identification information of described objective network access device;
According to described identification information, access described objective network access device.
In conjunction with any implementation in four kinds of possible implementations of the first to the of second aspect, second aspect, in the 5th kind of possible implementation aspect second, described scanning triggers message and also carries at least one information in following information: the service set of described at least one network access equipment, basic service set identification, channel.
The 3rd aspect, the embodiment of the present invention provides a kind of WLAN (wireless local area network) discover method, comprising:
Receive the first measuring-signal that subscriber equipment sends under active scan mode;
Described the first measuring-signal is measured to the first metrical information;
According to described the first metrical information, determine whether the objective network access device as described subscriber equipment.
In the possible implementation of the first aspect the 3rd, described according to described the first metrical information, before determining whether the objective network access device as described subscriber equipment, also comprise:
Receive the active scan response condition information that controller sends;
Described according to described the first metrical information, determine whether the objective network access device as described subscriber equipment, comprising:
According to described active scan response condition and described the first metrical information, determine whether the objective network access device as described subscriber equipment.
In the possible implementation of the second aspect the 3rd, described according to described the first metrical information, determine whether the objective network access device as described subscriber equipment, comprising:
To controller, send described the first metrical information;
Receive the access indication response message that described controller sends, described access indication response message is that described controller determines whether according to described the first metrical information can be as sending after objective network access device.
The 4th aspect, the embodiment of the present invention provides a kind of controller, comprising:
Generation module, triggers message for generating scanning, and described scanning triggers message and carries scan pattern, and described scan pattern is active scan mode or drive sweep pattern;
The first sending module, triggers message for send described scanning to subscriber equipment, so that described subscriber equipment scans at least one network access equipment of WLAN (wireless local area network) WLAN according to described scan pattern.
In the possible implementation of the first aspect the 4th, described controller also comprises:
The second sending module, for when described scan pattern is active scan mode, to described at least one network access equipment, send active scan response condition information, so that described at least one network access equipment is according to described active scan response condition information, determine whether the objective network access device as described subscriber equipment.
In the possible implementation of the second aspect the 4th, described controller also comprises:
Receiver module, for receiving metrical information, described metrical information is the first metrical information that the first measuring-signal that described at least one network access equipment sends under described active scan mode for described subscriber equipment measures; Or, described metrical information be described subscriber equipment under described drive sweep pattern, the second metrical information that the second measuring-signal sending for described at least one network access equipment measures;
Selecting module, for according to described metrical information, is described subscriber equipment select target network access equipment;
The 3rd sending module, for sending access indication response message to described at least one network access equipment.
The possible implementation of the second in conjunction with the 4th aspect, in the third possible implementation aspect the 4th, described selection module also for: according to described metrical information, and at least one information in the state of affairs information of the network state information of described at least one network access equipment, described subscriber equipment, be described subscriber equipment select target network access equipment.
The second or the third possible implementation in conjunction with the 4th aspect, in the 4th kind of possible implementation aspect the 4th, described the first sending module is also for sending access message to described subscriber equipment, described access message is carried the identification information of described objective network access device, so that described subscriber equipment according to described identification information, accesses described objective network access device.
In conjunction with any implementation in four kinds of possible implementations of the first to the of the 4th aspect, the 4th aspect, in the 5th kind of possible implementation aspect the 4th, described scanning triggers message and also carries at least one information in following information: the service set of described at least one network access equipment, basic service set identification, channel.
The 5th aspect, the embodiment of the present invention provides a kind of subscriber equipment, comprising:
The first receiver module, the scanning triggering message sending for receiving controller, described scanning triggers message and carries scan pattern, and described scan pattern is active scan mode or drive sweep pattern;
Scan module, for scanning at least one network access equipment of WLAN (wireless local area network) WLAN according to described scan pattern.
In the possible implementation of the first aspect the 5th, described subscriber equipment, also comprises:
The first sending module, for when described scan pattern is described active scan mode, to described at least one network access equipment, send the first measuring-signal, so that described at least one network access equipment measures the first metrical information to described the first measuring-signal.
In the possible implementation of the second aspect the 5th, described subscriber equipment, also comprises:
The second receiver module, for when described scan pattern is described drive sweep pattern, receives the second measuring-signal that described at least one network access equipment sends, and described the second measuring-signal is measured to the second metrical information;
The second sending module, for sending described the second metrical information to described controller.
In conjunction with the possible implementation of the first of the 5th aspect, in the third the possible implementation aspect the 5th, described the first receiver module also for:
Receive the objective network access device indication information that described at least one network access equipment sends, described objective network access device indication information be described at least one network access equipment according to the active scan response condition information and described the first metrical information that receive, determining can be as sending after objective network access device.
In conjunction with the first or the possible implementation of the second of the 5th aspect, in the 4th kind of possible implementation aspect the 5th, described the first receiver module also for:
Receive the access message that described controller sends, described access message is carried the identification information of described objective network access device;
According to described identification information, access described objective network access device.
In conjunction with any implementation in four kinds of possible implementations of the first to the of the 5th aspect, the 5th aspect, in the 5th kind of possible implementation aspect the 5th, described scanning triggers message and also carries at least one information in following information: the service set of described at least one network access equipment, basic service set identification, channel.
The 6th aspect, the embodiment of the present invention provides a kind of network access equipment, comprising:
The first receiver module, the first measuring-signal sending under active scan mode for receiving subscriber equipment;
Measurement module, for measuring the first metrical information to described the first measuring-signal;
Determination module, for according to described the first metrical information, determines whether the objective network access device as described subscriber equipment.
In the possible implementation of the first aspect the 6th, described network access equipment also comprises:
The second receiver module, the active scan response condition information sending for receiving controller;
Described determination module, for according to described active scan response condition and described the first metrical information, determines whether the objective network access device as described subscriber equipment.
In the possible implementation of the second aspect the 6th, described determination module specifically for:
To controller, send described the first metrical information;
Receive the access indication response message that described controller sends, described access indication response message is that described controller determines according to described the first metrical information whether network access equipment can be as sending after objective network access device.
WLAN (wireless local area network) discover method, controller, subscriber equipment and network access equipment that the embodiment of the present invention provides, generate scanning triggering message for subscriber equipment after, controller sends the scanning triggering message of carrying scan pattern to subscriber equipment, triggering subscriber equipment scans near network access equipment, avoid a large number of users equipment all active scan carry out WLAN (wireless local area network) discovery and the signaling storm that causes, cause network congestion.And, for not supporting Wi-Fi to measure or the lower subscriber equipment of certainty of measurement, it can be set and only can adopt active scan mode, Wi-Fi surveying work is carried out by network access equipment, thereby obtain WLAN (wireless local area network) more accurately, finds.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the flow chart of WLAN (wireless local area network) discover method embodiment mono-of the present invention;
Fig. 2 is the flow chart of WLAN (wireless local area network) discover method embodiment bis-of the present invention;
Fig. 3 is the flow chart of WLAN (wireless local area network) discover method embodiment tri-of the present invention;
Fig. 4 is the signaling diagram of WLAN (wireless local area network) discover method embodiment tetra-of the present invention;
Fig. 5 is the signaling diagram of WLAN (wireless local area network) discover method embodiment five of the present invention;
Fig. 6 is the signaling diagram of WLAN (wireless local area network) discover method embodiment six of the present invention;
Fig. 7 is the signaling diagram of WLAN (wireless local area network) discover method embodiment seven of the present invention;
Fig. 8 is the signaling diagram of WLAN (wireless local area network) discover method embodiment eight of the present invention;
Fig. 9 is the structural representation of controller embodiment mono-of the present invention;
Figure 10 is the structural representation of controller embodiment bis-of the present invention;
Figure 11 is the structural representation of subscriber equipment embodiment mono-of the present invention;
Figure 12 is the structural representation of subscriber equipment embodiment bis-of the present invention;
Figure 13 is the structural representation of network access equipment embodiment mono-of the present invention;
Figure 14 is the structural representation of network access equipment embodiment bis-of the present invention.
Embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is the flow chart of WLAN (wireless local area network) discover method embodiment mono-of the present invention.The executive agent of the present embodiment is controller, is applicable to may have a plurality of network access equipments in communication network, needs subscriber equipment to carry out the scene of network access equipment discovery.Concrete, the present embodiment comprises the steps:
101, generate scanning and trigger message, scanning triggers message and carries scan pattern, and scan pattern is active scan mode or drive sweep pattern.
If subscriber equipment needs visited WLAN network, need near network access equipment finding, accessible, as WAP (wireless access point) (Access Point is called for short AP), with network access equipment authenticate with associated after, just can visited WLAN network.The process that subscriber equipment obtains network access equipment information is called WLAN (wireless local area network) discovery.In this step, controller is that subscriber equipment generates the scanning triggering message of carrying scan pattern, triggers subscriber equipment near network access equipment is scanned, and wherein, scan pattern is active scan mode or drive sweep pattern.
Concrete, before generating scanning triggering message, controller can first be determined the wireless local area network scan pattern of subscriber equipment.Conventionally, the applicable scan pattern of different conditions of communication network may be different, under drive sweep pattern, UE does not send any packet, only receive the beacon frame (Beacon) that the network equipment cycle sends, therefore, if the duty ratio of network access equipment is heavier, while surpassing default threshold values, controller notifying user equipment adopts active scan mode; Otherwise notifying user equipment adopts active scan mode, and all network access equipments or some selected network access equipment are scanned.Or controller also can, according to carrying out the number of the subscriber equipment of WLAN (wireless local area network) discovery in communication network, determine that the WLAN (wireless local area network) of subscriber equipment is found scan pattern.For example, when the quantity that needs to carry out the subscriber equipment of WLAN (wireless local area network) discovery in communication network surpasses default threshold values, notify all or part of subscriber equipment to adopt drive sweep pattern; Otherwise notifying user equipment adopts active scan mode.In addition, for a certain concrete subscriber equipment, it be can set in advance and drive sweep pattern or active scan mode adopted, for example, for supporting Wi-Fi to measure and the higher subscriber equipment of certainty of measurement, it can be set and adopt drive sweep pattern or active scan mode, and for not supporting Wi-Fi to measure or the lower subscriber equipment of certainty of measurement, it can be set and only can adopt active scan mode.
102, to subscriber equipment, send scanning and trigger message, so that subscriber equipment scans at least one network access equipment of WLAN (wireless local area network) WLAN according to scan pattern.
Generate scanning triggering message for subscriber equipment after, controller sends this scanning to subscriber equipment and triggers message, for example, scanning is triggered to message and be carried at Internet protocol (Internet Protocol, abbreviation IP) in packet, pass through third generation partner program (the3rd Generation Partnership Project, abbreviation 3GPP) wireless access network (Radio Access Network, abbreviation RAN) send to subscriber equipment, or, scanning is triggered to message and be carried at cellular signaling, as radio resource control information (Radio resource control, abbreviation RRC) in, by 3GPP RAN, send to subscriber equipment.Controller can be an independently network element, also can be the module increasing in existing network element in 3GPP, as the function of controller can be by upgrading universal mobile telecommunications system (Universal Mobile Telecommunications System, abbreviation UMTS) radio network controller (Radio Network Controller, be called for short RNC) or Long Term Evolution (Long Time Evolution, abbreviation LTE) enode b (Evolution Node B is called for short eNB) is realized.
The WLAN (wireless local area network) discover method that the embodiment of the present invention provides, generate scanning triggering message for subscriber equipment after, controller sends the scanning triggering message of carrying scan pattern to subscriber equipment, triggering subscriber equipment scans near network access equipment, avoid a large number of users equipment all active scan carry out WLAN (wireless local area network) discovery and the signaling storm that causes, cause network congestion.And, for not supporting Wi-Fi to measure or the lower subscriber equipment of certainty of measurement, it can be set and only can adopt active scan mode, Wi-Fi surveying work is carried out by network access equipment, thereby obtain WLAN (wireless local area network) more accurately, finds.
Further, in above-described embodiment one, if controller is determined communication network, be applicable to subscriber equipment employing active scan mode, now, can whether be can be used as by network access equipment decision-making the objective network access device of subscriber equipment.Concrete, when scan pattern is active scan mode, controller sends active scan response condition information at least one network access equipment, so that at least one network access equipment, according to active scan response condition information, determines whether the objective network access device as subscriber equipment.
Wherein, in active scan response condition information, carried the condition that the probe request that network access equipment sends under aggressive mode subscriber equipment (Probe Request) responds, in the time of must reaching certain threshold value as the signal strength signal intensity of probe request, network access equipment just sends probing response frame (Probe Response) and responds, further, above-mentioned active scan response condition information also comprises the requirement of some parameters such as load to network access equipment, traffic delay.
Further, in above-described embodiment one, no matter subscriber equipment adopts active scan mode or drive sweep pattern, and which network access equipment controller can be determined for this subscriber equipment and can be used as objective network access device.Concrete, after subscriber equipment sends scanning triggering message, controller also receives metrical information, according to metrical information, is subscriber equipment select target network access equipment.For subscriber equipment, determining after objective network access device, at least one network access equipment, sending access indication response message, to indicate each network equipment whether to can be used as the objective network access device of subscriber equipment.
Wherein, metrical information is specially the first metrical information that the first measuring-signal that at least one network access equipment sends under active scan mode for subscriber equipment is measured and reported, for example, the probe request that network access equipment sends under active scan mode subscriber equipment (Probe Request) is carried out signal strength signal intensity (Received Signal Strength Indicator, abbreviation RSSI) measurement or signal to noise ratio (Signal to Noise Ratio is called for short) measure; Or, metrical information also can be the second measurement message that subscriber equipment is measured the second measuring-signal and reported, concrete, subscriber equipment is under drive sweep pattern, receive the beacon frame (Beacon) that at least one network access equipment periodically sends, this beacon frame is carried out to signal strength measurement or snr measurement, obtain the second metrical information and send to controller.
Controller, after receiving metrical information, according to metrical information, is subscriber equipment select target network access equipment.Controller can, after receiving the metrical information of network access equipment or subscriber equipment transmission, judge that whether this network access equipment is applicable to subscriber equipment access, makes the timely access network access device of subscriber equipment carry out the access of wlan network at every turn immediately; Or, controller also can receive the first metrical information that all-network access device sends, or after the second metrical information of measuring of the second measuring-signal to each network access equipment of sending of subscriber equipment, from numerous network access equipments, select best network access equipment for subscriber equipment access; Or controller also can be after certain time length, according to the metrical information receiving, for subscriber equipment is selected best objective network access device.
In general, controller can meet metrical information the network access equipment of subscriber equipment access as objective network access device, for example, metrical information is reached to certain requirement, the network access equipment that surpasses certain thresholding as signal strength signal intensity or signal to noise ratio is as objective network access device; Or the network access equipment of controller State selective measurements information optimum is as objective network access device, for example, using the network access equipment of signal strength signal intensity maximum or signal to noise ratio maximum as objective network access device.Further, controller can be in conjunction with the network state information of network access equipment, for example, in the network access equipment that meets subscriber equipment access, select to provide maximum bandwidth, minimal service time delay or the lightest network access equipment of loading as objective network access device; Controller also can be in conjunction with the state of affairs information of subscriber equipment, for example, according to network state information and metrical information, determine service quality (the Quality of Service that network access equipment can provide for subscriber equipment, be called for short QoS), using the network access equipment of service quality that meets user apparatus service as objective network access device.
For subscriber equipment, determining after objective network access device, controller sends access indication response message to each network access equipment, so that each network access equipment is according to this access indication response message, determines whether to respond subscriber equipment.For example, when subscriber equipment adopts active scan mode, controller sends the access indication response message of the probe request (Probe Request) of this objective network access device response subscriber equipment of indication to the objective network access device of determining; To other network access equipments except objective network access device, send the access indication response message that those network access equipments of indication do not respond the probe request (Probe Request) of subscriber equipment.
In addition, determining after objective network access device for subscriber equipment, controller also sends access message to subscriber equipment, and access message is carried the identification information of objective network access device, so that subscriber equipment, according to identification information, accesses objective network access device.Concrete, controller can be carried at access message in IP packet and send to subscriber equipment by 3GPP RAN, or, access message is carried to cellular signaling, as Radio Resource is controlled (Radio Resource Control, abbreviation RRC) in message, by 3GPP RAN, send to subscriber equipment, the present invention is not as restriction.
Wherein, the identification information of objective network access device can comprise service set (the Service Set Identifier of objective network access device, abbreviation SSID), basic service sign (Basic Service Set Identifier is called for short BSSID), channel (Channel).Wherein, the network identity that service set is network access equipment, can be that a plurality of network access equipments share same service set; Basic service set identification is the identify label of network access equipment, is generally the Media Access Control Address (Media Access Control Address is called for short MAC Add) of the Wi-Fi module of network access equipment; Channel is the working channel/frequency of network access equipment, and Wi-Fi can be operated in a plurality of frequency ranges, and each frequency range is divided into again a plurality of channel/frequencies.Subscriber equipment can send the probe request of carrying service set or basic service set identification according to the identification information of above-mentioned objective network access device on specific channel/frequency, accesses objective network access device after receiving probe response.
Further, in above-described embodiment one, in order to make subscriber equipment only scan the network access equipment of appointment, for example, if there are several network access equipments in communication network, the load of 2 network access equipments is wherein low weight, and the load of other network access equipments is all heavier, can designated user equipment only scans the network access equipment of these 2 light loads.Now, scanning triggers service set (the Service set identifier that message can also be carried network access equipment, be called for short SSID) or basic service set identification (Basic Service set identifier, be called for short BSSID) etc., subscriber equipment is only scanned the network access equipment of appointment.The enterprising line scanning of channel for fear of subscriber equipment in other network access equipment work, affect the business transmission of other network access equipments, scanning triggers channel (channel) information that message can also be carried network access equipment, the channel of the network access equipment work of this channel information indication appointment, makes the only enterprising line scanning of channel to channel information indication of subscriber equipment.
Fig. 2 is the flow chart of WLAN (wireless local area network) discover method embodiment bis-of the present invention.The executive agent of the present embodiment is subscriber equipment, is applicable to may have a plurality of network access equipments in communication network, needs subscriber equipment to carry out the scene of network access equipment discovery.Concrete, the present embodiment comprises the steps:
201, receive the scanning triggering message that controller sends, scanning triggers message and carries scan pattern, and scan pattern is active scan mode or drive sweep pattern.
Subscriber equipment receives the scanning triggering message of carrying scan pattern that controller sends, and scan pattern is active scan mode or drive sweep pattern.Concrete, can, referring to Fig. 1 embodiment mono-step 101, repeat no more herein.
202, according to scan pattern, at least one network access equipment of WLAN (wireless local area network) WLAN is scanned.
Subscriber equipment scans the network access equipment in communication network according to scan pattern.Concrete, if scan pattern is active scan mode, subscriber equipment sends the first measuring-signal at least one network access equipment, so that at least one network access equipment measures the first metrical information to the first measuring-signal, wherein, the first measuring-signal can be probe request (Probe Request), and the first metrical information specifically comprises the identification information (as MAC Add) of subscriber equipment, the signal strength information of the first measuring-signal or signal to noise ratio information etc.After obtaining the first metrical information, network access equipment can report controller by the first metrical information, by controller, according to the first metrical information, determines whether this network access equipment can be used as the objective network access device of subscriber equipment; Or network access equipment also can receive the active scan response condition information that controller sends, and according to active scan response condition and the first metrical information, determines whether it can be used as the objective network access device of subscriber equipment.If of course, to subscriber equipment, send objective network access device indication information, subscriber equipment receives this objective network access device indication information, according to this objective network access device indication information, accesses the access that this network access equipment carries out wlan network.
When if scan pattern is drive sweep pattern, subscriber equipment receives the second measuring-signal that at least one network access equipment sends, the second measuring-signal is measured the second metrical information and sends the second metrical information to controller, wherein, the beacon frame (Beacon) that the second measuring-signal can periodically send for network access equipment, the beacon frame that subscriber equipment sends each network access equipment is measured, obtain the second metrical information, the second metrical information specifically comprises the identification information (as BSSID or SSID etc.) of network access equipment, the signal strength information of the second measuring-signal or signal to noise ratio information etc.
In the present embodiment, if objective network access device is controller is that subscriber equipment is determined according to the first metrical information receiving or the second metrical information, when controller is that subscriber equipment is determined after objective network access device, to subscriber equipment, send the access message of the identification information that carries objective network access device, subscriber equipment receives this access message, according to this access message access objective network access device, carries out the access of wlan network.
The WLAN (wireless local area network) discover method that the embodiment of the present invention provides, the scanning of carrying concrete scan pattern that subscriber equipment sends according to controller triggers message, adopt suitable scan pattern to scan the network access equipment in communication network, avoid a large amount of UE all active scan carry out WLAN (wireless local area network) and find to cause signaling storm, cause network congestion.For not supporting Wi-Fi to measure or the lower subscriber equipment of certainty of measurement, can only can adopt active scan mode, Wi-Fi surveying work is carried out by network access equipment, carry out the discovery of more accurate WLAN (wireless local area network).In addition, in the present embodiment, under active scan mode, by network access equipment, as AP measures, certainty of measurement is high, and can avoid the subscriber equipment energy consumption that measurement causes to network access equipment to increase.
Further, in above-described embodiment two, in order to make subscriber equipment only scan the network access equipment of appointment, for example, if there are several network access equipments in communication network, the load of 2 network access equipments is wherein low weight, and the load of other network access equipments is all heavier, can designated user equipment only scans the network access equipment of these 2 light loads.Now, scanning triggers service set (the Service set identifier that message can also be carried network access equipment, be called for short SSID) or basic service set identification (Basic Service set identifier, be called for short BSSID) etc., subscriber equipment is only scanned the network access equipment of appointment.The enterprising line scanning of channel for fear of subscriber equipment in other network access equipment work, affect the business transmission of other network access equipments, scanning triggers channel (channel) information that message can also be carried network access equipment, the channel of the network access equipment work of this channel information indication appointment, the enterprising line scanning of channel that subscriber equipment is only indicated at channel information.
Fig. 3 is the flow chart of WLAN (wireless local area network) discover method embodiment tri-of the present invention.The executive agent of the present embodiment is network access equipment, is applicable to when subscriber equipment adopts active scan mode, and need to determine whether will be as the scene of the objective network access device of subscriber equipment.Concrete, the present embodiment comprises the steps:
301, receive the first measuring-signal that subscriber equipment sends under active scan mode.
Network access equipment receives the first measuring-signal that subscriber equipment sends under active scan mode, for example, when subscriber equipment is receiving after the scanning trigger message that carries active scan mode, to network access equipment, send the first measuring-signal, as probe request (Probe Request), network access equipment receives this first measuring-signal.
302, the first measuring-signal is measured to the first metrical information.
After receiving the first measuring-signal, network access equipment is measured this first measuring-signal, obtain the first metrical information, the first metrical information specifically comprises the identification information (as MAC Add) of subscriber equipment, the signal strength information of the first measuring-signal or signal to noise ratio information etc.
303,, according to the first metrical information, determine whether the objective network access device as subscriber equipment.
Network access equipment can be according to the first metrical information, determine whether can be used as the objective network access device of subscriber equipment, or, this the first metrical information can be sent to controller, by controller, determine whether this network access equipment can be used as the objective network access device of subscriber equipment.
Concrete, network access equipment can receive the active scan response condition information that controller sends, after obtaining the first metrical information, according to active scan response condition and the first metrical information, determine whether the objective network access device as subscriber equipment, if network access equipment judges that it can be used as the objective network access device of subscriber equipment, to subscriber equipment, send objective network access device indication information, as send probing response frame (Probe Response), probe request to subscriber equipment responds, make subscriber equipment access this network access equipment visited WLAN network, otherwise network access equipment does not respond subscriber equipment.Or, after obtaining the first metrical information, network access equipment sends this first metrical information to controller, make controller determine according to this first metrical information whether network access equipment can be as objective network access device, can be as the objective network access device of subscriber equipment if controller is determined network access equipment, to this network access equipment, send access indication response message, network access equipment responds subscriber equipment according to this access indication response message, as sent probing response frame (Probe Response).
The WLAN (wireless local area network) discover method that the embodiment of the present invention provides, when subscriber equipment adopts active scan mode, the first measuring-signal that network access equipment sends subscriber equipment measures the first metrical information, and network access equipment determines whether can be used as the objective network access device of subscriber equipment according to the active scan response condition information of the first metrical information and controller transmission; Or network access equipment reports controller by this first metrical information, by controller, determine whether this network access equipment can be used as the objective network access device of subscriber equipment.In the present embodiment, network access equipment is measured the first measuring-signal, and certainty of measurement is high, is embodied as subscriber equipment and selects best network access equipment and can avoid the energy consumption that subscriber equipment measurement causes to increase.
Fig. 4 is the signaling diagram of WLAN (wireless local area network) discover method embodiment tetra-of the present invention.The present embodiment determines that with controller take active scan mode scans to two network access equipments in communication network that the present invention will be described in detail as example, in the present embodiment, network access equipment is specially wireless access point AP, the signaling relevant to 3GPP RAN sends by honeycomb control information, the metrical information receiving in the disposable processing scheduled duration of controller.Concrete, the present embodiment comprises the steps:
401, controller sends scanning to subscriber equipment and triggers message.
Concrete, this step comprises following sub-step:
4011, controller sends scanning to 3GPP RAN and triggers message.
This scanning triggers message and carries active scan mode.In addition, controller is by the cellular identity sign of subscriber equipment, as international mobile subscriber identity (International Mobile Subscriber Identity, be called for short IMSI), interim identification code (Temporary Mobile Subscriber Identity, be called for short TMSI) etc., together with triggering message with scanning, send to 3GPP RAN, so that 3GPP RAN is according to the cellular identity sign of subscriber equipment, scanning is triggered to message and be carried at honeycomb control signal, as Radio Resource is controlled (Radio Resource Control, abbreviation RRC) in, send to subscriber equipment, making subscriber equipment receive scanning triggers after message, according to scanning, triggering message scans.
Further, in order to make subscriber equipment only scan the network access equipment of appointment, for example, in the present embodiment, scanning triggers finger service set (the Service set identifier that message can also be carried network access equipment, be called for short SSID) or basic service set identification (Basic Service set identifier is called for short BSSID) etc., subscriber equipment is only scanned the network access equipment of appointment.
Further, the enterprising line scanning of channel for fear of subscriber equipment in other network access equipment work, affect the business transmission of other network access equipments, scanning triggers channel (channel) information that message can also be carried network access equipment, the channel of the network access equipment work of this channel information indication appointment, the enterprising line scanning of channel that subscriber equipment is only indicated at channel information.
Below in order to clearly demonstrate the present invention, the scanning message of all take is carried the SSID of access point and channel and is elaborated as example, yet, in actual execution mode, can carry according to demand one or more information of network access equipment, or, do not carry any information and the all-network access device in can sweep limits scanned.
4012,3GPP RAN sends honeycomb control signal to subscriber equipment.
3GPP RAN is to access network elements in mobile cellular system general designation, network element corresponding in different mobile cellular systems may be different, as global system for mobile communications (Global System for Mobile, abbreviation GSM) base station (the Base Station in, be called for short BS), universal mobile telecommunications system (Universal Mobile Telecommunications System, abbreviation UMTS) Node B (Node B) in, Long Term Evolution (Long Term Evolution, abbreviation LTE) enode b (the Evolution Node B in, be called for short eNB) etc., the present invention is not as restriction.3GPP RAN is according to the cellular identity sign of the subscriber equipment receiving, scanning is triggered to message and be carried at honeycomb control signal, as radio resource control information (Radio Resource Control, abbreviation RRC) in, send to the subscriber equipment of determining, trigger subscriber equipment network access equipment is scanned.Concrete, honeycomb control signal can also carry SSID and the channel of AP1, AP2.Wherein, AP1 and AP2 can be used same SSID, as (the China Mobile Communication Corporation of China Mobile, be called for short CMCC),, AP1 and AP2 have BSSID separately, and AP1 and AP2 work on the channel in Wi-Fi2.4G frequency range 1 and channel 6 respectively.In addition, for the sake of clarity, on the identical and channel 1 of AP1 in Wi-Fi2.4G frequency range of the SSID of AP1 and AP2 of all take in following examples, work, work on the channel 6 of AP2 in Wi-Fi2.4G frequency range as example the embodiment of the present invention is described in detail, yet, in other possible execution modes, the SSID of each network access equipment also may be different, and the present invention is not as restriction.
402, subscriber equipment scans network access equipment.
Subscriber equipment receives after honeycomb control signal, and discovery scan pattern is active scan mode, and only has two channels to need scanning, and the channel at AP1 and AP2 place carries out active scan.
Concrete, this step comprises following sub-step:
4021, subscriber equipment sends the first measuring-signal on the channel 1 of the 2.4G at AP1 place.
Concrete, the first measuring-signal is probe request (Probe Request).In this probe request, carry the identify label of the Wi-Fi measurement module of SSID and subscriber equipment, as the Media Access Control Address of subscriber equipment, make follow-up WLAN (wireless local area network) discovery procedure middle controller determine concrete subscriber equipment according to the identify label of this Wi-Fi measurement module, as a rule, this sign has uniqueness.
4022, subscriber equipment sends the first measuring-signal on the channel 6 of the 2.4G at AP2 place.
Concrete, please refer to step 4021, repeat no more herein.
It should be noted that, above-mentioned steps 4021,4022 does not have strict sequencing; Or controller also can arrange the priority of scanning channel, the embodiment of the present invention is not as restriction.
403, the first measuring-signal is measured metrical information and reports controller.
Concrete, this step comprises following sub-step:
4031, AP1 measures and reports controller to the first measuring-signal receiving on the channel 1 of the 2.4G at its place.
AP1 measures the probe request receiving (Probe Request), concrete, AP1 obtains signal strength signal intensity (the Received Signal Strength Indicator of this probe request by measurement, be called for short RSSI) information or signal to noise ratio (Signal Noise Ratio is called for short SNR).In addition, the identify label that AP1 also need obtain subscriber equipment Wi-Fi measurement module from the probe request (Probe Request) receiving.After measurement, AP1 sends to controller by the identify label of metrical information and subscriber equipment Wi-Fi measurement module.
Further, AP1 can be by the network state information of self, as load (Load) information, traffic delay information, number of users (associated user number or active users) information etc. are carried at, sends to controller in metrical information.
4032, AP2 measures and reports controller to the first measuring-signal receiving on the channel 6 of the 2.4G at its place.
Please refer to step 4031, repeat no more herein.
It should be noted that, above-mentioned steps 4031,4032 does not have strict sequencing, and step 4012 and step 4031 do not have strict sequencing yet, and the embodiment of the present invention is not as restriction.
404, controller is that subscriber equipment is selected suitable objective network access device.
Receive after the metrical information of the identify label of carrying subscriber equipment Wi-Fi measurement module, because controller is preserved the cellular identity sign of subscriber equipment and the corresponding relation of the identify label of Wi-Fi measurement module in advance, therefore according to the identify label of family equipment Wi-Fi measurement module, controller can be determined corresponding subscriber equipment.The network state information of the metrical information reporting according to each network access equipment and the state of affairs of subscriber equipment or each network access equipment, for subscriber equipment select target network access equipment, for example, controller estimates according to the load condition information of network access equipment and RRSI the transmission rate that this network access equipment can provide for subscriber equipment, then judge that can this transmission rate support the current business at network side of subscriber equipment, if the transmission rate of the service needed 2M/s that subscriber equipment is current, controller need to select at least can provide the network access equipment of 2M/s transmission rate as objective network access device from the metrical information that each network access equipment reports.
Wherein, controller can obtain the corresponding relation of the identify label of subscriber equipment identify label and Wi-Fi measurement module from the CAMEL-Subscription-Information of subscriber equipment; Or subscriber equipment sends to controller by the mode of Internet protocol bag (Internet Protocol Packet is called for short IP bag) by the corresponding relation of the identify label of subscriber equipment identify label and Wi-Fi measurement module; Or subscriber equipment is carried at the corresponding relation of the identify label of subscriber equipment identify label and Wi-Fi measurement module in honeycomb control signal, sends to controller by 3GPP RAN.
After selecting objective network access device, whether controller sends access indication response message to the network access equipment that has respectively reported metrical information, indicate each network access equipment the first measuring-signal of subscriber equipment to be responded.The objective network access device of applicable subscriber equipment access may have a plurality of, supposes in this step, and only AP1 is objective network access device, and this step comprises following sub-step:
4041, controller sends access indication response message (Response indication) to AP1.
Controller sends the access indication response message of the first measuring-signal of indication AP1 response subscriber equipment to AP1.
4042, controller sends access indication response message (Response indication) to AP2.
Controller sends to AP2 the access indication response message that indication AP2 does not respond the first measuring-signal of subscriber equipment.
It should be noted that, above-mentioned steps 4041,4042 does not have strict sequencing, and step 4032 and step 4041 do not have strict sequencing yet, and the embodiment of the present invention is not as restriction.
405, controller sends access message (AP Access request) to 3GPP RAN.
After determining objective network access device AP1, controller is AP1 by 3GPP RAN notifying user equipment objective network access device.Concrete, controller sends AP Access request to 3GPP RAN, wherein carries the SSID of AP1, the BSSID of AP1, and the channel of AP1 work etc.The cellular identity sign of subscriber equipment sends to 3GPP RAN together with access message, and its effect please refer to step 4011, repeats no more herein.
406,3GPP RAN sends honeycomb control signal to subscriber equipment.
According to the cellular identity sign of subscriber equipment, 3GPP RAN is carried at honeycomb control signal by access message, as sent to subscriber equipment to determine subscriber equipment in radio resource control information (Radio Resource Control is called for short RRC).Different from the honeycomb control signal in step 4012, in this step, honeycomb control signal only carries the SSID of above-mentioned AP1, the channel information at the BSSID of AP1 and AP1 work place etc.
407, subscriber equipment sends probe request (Probe Request) to AP1.
Subscriber equipment, the BSSID of AP1 etc., and is determined the channel at AP1 work place according to the SSID of AP1 in the honeycomb control signal receiving according to channel information, on this channel, as sent probe request to AP1 on the channel 1 at 2.4G.
408, AP1 sends probing response frame (Probe response) to subscriber equipment.
409, subscriber equipment access AP1.
Subscriber equipment and AP1 carry out authentication associated, subscriber equipment access AP1.
The WLAN (wireless local area network) discover method that this enforcement provides, controller in certain hour section, receive subscriber equipment can sweep limits in the metrical information of all-network access device, or receive after the metrical information of network access equipment of designated user scanning, from numerous network access equipments, for subscriber equipment, determine best network access equipment and access for subscriber equipment.
Fig. 5 is the signaling diagram of WLAN (wireless local area network) discover method embodiment five of the present invention.The difference part of the present embodiment and above-mentioned Fig. 4 embodiment tetra-is: in the present embodiment, the signaling relevant to 3GPP RAN can be carried in IP bag and send, concrete:
5011, controller sends and carries the IP bag that scanning triggers message to 3GPP RAN.
5012,3GPP RAN sends and carries the IP bag that scanning triggers message to subscriber equipment.
505, controller sends the IP bag that carries access message (AP Access request) to 3GPP RAN.
506,3GPP RAN sends the IP bag that carries access message (AP Access request) to subscriber equipment.
Step 502～504,507～509 please refer to Fig. 4 embodiment tetra-, repeat no more herein.
Fig. 6 is the signaling diagram of WLAN (wireless local area network) discover method embodiment six of the present invention.The difference part of the present embodiment and above-mentioned Fig. 4 embodiment tetra-is: in the present embodiment, controller often receives after the metrical information that a network access equipment reports, and whether this network access equipment of decision-making immediately needs the first measuring-signal that subscriber equipment is sent to respond.Concrete, the present embodiment comprises the steps:
601, controller sends scanning to subscriber equipment and triggers message.
Concrete, this step comprises following sub-step:
6011, controller sends scanning to 3GPP RAN and triggers message.
6012,3GPP RAN sends honeycomb control signal to subscriber equipment.
Above-mentioned steps 6011,6012 please refer to 4011,4012 of Fig. 4 embodiment tetra-, repeats no more herein.
Suppose in the present embodiment, subscriber equipment first scans the channel at AP1 place, and the rear channel to AP2 place scans, and performs step 6021.
6021, subscriber equipment sends the first measuring-signal on the channel at AP1 place.
6031, AP1 measures and reports controller to the first measuring-signal receiving on the channel at its place.
6041, controller sends access indication response message (Response indication) to AP1.
Different from above-mentioned Fig. 4 embodiment tetra-is, in embodiment tetra-, after the metrical information that the network access equipment of controller in receiving certain hour reports, it from numerous network equipments, is subscriber equipment select target network access equipment, and in the present embodiment, network access equipment of the every scanning of subscriber equipment, this network equipment measures metrical information to the first measuring-signal, and immediately to controller report metrical information for controller decision-making.If controller judges this network access equipment and is applicable to subscriber equipment access, to this network access equipment, send the access indication response message of the first measuring-signal of this network access equipment response subscriber equipment of indication; Otherwise, if controller judge this network then equipment be not suitable for subscriber equipment access, to this network access equipment, send the access indication response message of the first measuring-signal that does not respond subscriber equipment.
Suppose in above-mentioned steps 6041, controller is judged AP1 and is not suitable for subscriber equipment access.
6022, subscriber equipment sends the first measuring-signal on the channel at AP2 place.
6032, AP2 measures and reports controller to the first measuring-signal receiving on the channel at its place.
6042, controller sends access indication response message (Response indication) to AP2.
Suppose that step 6042 middle controller determines the objective network access device that AP2 can be used as subscriber equipment.
605, AP2 sends probing response frame (Probe response) to subscriber equipment.
606, subscriber equipment access AP2.
In the present embodiment, controller often receives after the metrical information that a network access equipment reports, whether this network access equipment of decision-making immediately needs the first measuring-signal that subscriber equipment is sent to respond, because the definite objective network access device of controller is to be all applicable to subscriber equipment access, therefore, subscriber equipment can select one to access in receiving the network access equipment of probing response frame, once or stop scanning after receiving the probing response frame of a network access equipment, directly access this network access equipment, without controller, by 3GPP RAN notifying user equipment objective network access device, which is, be in the present embodiment, without perform step the action of 405～407 correspondences as Fig. 4 embodiment tetra-.
The WLAN (wireless local area network) discover method that this enforcement provides, controller often receives after the metrical information that a network access equipment reports, whether this network access equipment of decision-making immediately needs the first measuring-signal that subscriber equipment is sent to respond, once find to be applicable to the network access equipment of subscriber equipment access, indicate the probe request of this network access equipment response subscriber equipment, make subscriber equipment in time access network access device carry out the access of wlan network, with respect to embodiment tetra-, WLAN (wireless local area network) discovery speed is fast, but the network access equipment of determining may not be best network access equipment.
Fig. 7 is the signaling diagram of WLAN (wireless local area network) discover method embodiment seven of the present invention.The difference part of the present embodiment and above-described embodiment six is, in the present embodiment, controller sends active scan response condition information to each network access equipment, make each network access equipment after receiving the first measuring-signal of subscriber equipment transmission, the network equipment measures after metrical information this first measuring-signal, according to metrical information and active scan response condition information, determine whether can be used as the objective network access device of subscriber equipment, without metrical information being reported to controller, by controller, carry out decision-making.Concrete, the present embodiment comprises the following steps:
700, controller sends active scan response condition information (Response threshold) to network access equipment.
Controller can send active scan response condition information by each network access equipment in can sweep limits to subscriber equipment, also can send to the network access equipment of appointment active scan response condition information.Wherein, active scan response condition information can be for example signal strength signal intensity RRSI or the signal to noise ratio snr of the probe request of subscriber equipment, when RRSI or SNR are greater than a certain threshold values, responds; Further, response condition information can also comprise the load (Load) of network access equipment, when load is less than preset value, responds; Or, when the available transmission rate of network access equipment is not less than a certain thresholding, respond.If the network access equipment of appointment is AP1 and AP2 in the present embodiment, this step comprises following sub-step:
7001, controller sends active scan response condition information to AP1.
7002, controller sends active scan response condition information to AP2.
701, controller sends scanning to subscriber equipment and triggers message.
Concrete, this step comprises following sub-step:
7011, controller sends scanning to 3GPP RAN and triggers message.
7012,3GPP RAN sends honeycomb control signal to subscriber equipment.
702, subscriber equipment scans network access equipment
Concrete, this step comprises following sub-step:
7021, subscriber equipment sends the first measuring-signal on the channel at AP1 place.
Subscriber equipment scans AP1, the first measuring-signal is carried out to RSSI, SNR etc. at AP1 o'clock and measure metrical information, judge whether metrical information meets active scan response condition information, if meet, to subscriber equipment, send objective network access device Indication message, as sent probing response frame, the probe request of subscriber equipment transmission is responded; Otherwise the probe request that network access equipment does not send subscriber equipment responds.Suppose that AP1 judges that it does not meet active scan response condition, does not respond subscriber equipment.
7022, subscriber equipment sends the first measuring-signal on the channel at AP2 place.
In actual execution mode, the scanning sequency of AP1 and AP2 can be determined according to demand by controller or subscriber equipment.
703, AP2 sends objective network access device Indication message (Probe response) to subscriber equipment.
If AP2 determines its objective network access device that can be used as subscriber equipment in step 7022, to subscriber equipment, send objective network access device Indication message.
704, subscriber equipment access AP2.
Subscriber equipment and AP2 carry out authentication associated, access AP2 network wlan network.
The WLAN (wireless local area network) discover method that this enforcement provides, controller sends active scan response condition information (Response threshold) to network access equipment, when network access equipment receives the first measuring-signal that subscriber equipment sends, after being broadcast request frame (Probe Request), the first measuring-signal is measured to metrical information, judge whether the first metrical information meets active scan response condition, thereby determine whether subscriber equipment to respond, make subscriber equipment according to the response condition of network access equipment, access the access that suitable network access equipment carries out wlan network in time.Subscriber equipment can be to complete after scanning according to scanning trigger message, in the network access equipment of response, select an access, or, after receiving the response of a network access equipment, stop scanning, access the access that this network access equipment carries out wlan network.
Fig. 8 is the signaling diagram of WLAN (wireless local area network) discover method embodiment eight of the present invention.The difference part of the present embodiment and above-described embodiment four～embodiment seven is, in the present embodiment, controller is judged communication network and is applicable to drive sweep.Concrete, the present embodiment comprises the steps:
801, controller sends scanning to subscriber equipment and triggers message.
Concrete, this step comprises following sub-step:
8011, controller sends scanning to 3GPP RAN and triggers message.
8012,3GPP RAN sends honeycomb control signal to subscriber equipment.
Concrete, above-mentioned steps 8011,8012 please refer to Fig. 4 embodiment tetra-steps 4011,4012, repeats no more herein.
802, subscriber equipment receives the second measuring-signal that network access equipment sends.
Suppose in the present embodiment only have AP1 and AP2 periodically to send the second measuring-signal on working channel separately, this step comprises following sub-step:
8021, AP1 sends the second measuring-signal (Beacon frame) on the channel at its place.
8022, the second measuring-signal that subscriber equipment sends AP1 is measured.
8023, AP2 sends the second measuring-signal (Beacon frame) on the channel at its place.
8024, the second measuring-signal that subscriber equipment sends AP2 is measured.
803, subscriber equipment reports controller by the measurement result of the second measuring-signal that each network access equipment is sent.
Subscriber equipment sends honeycomb control signal to 3GPP RAN, and the measurement result of wherein carrying the second measuring-signal, reports controller by 3GPP RAN.
804, controller is that subscriber equipment is selected suitable objective network access device.
Controller is according to the metrical information of each network access equipment of user equipment to report, for subscriber equipment, select suitable objective network access device, suppose in this step, AP2 does not support the access of subscriber equipment, AP1 supports the access of subscriber equipment, and this step comprises following sub-step:
8041, controller sends access indication response message (Response indication) to AP1.
Controller sends the access indication response message of the probe request of indication AP1 response subscriber equipment transmission to AP1.
8042, controller sends access indication response message (Response indication) to AP2.
Controller sends to AP2 the access indication response message that indication AP2 does not respond the probe request of subscriber equipment.
805, controller sends access message (AP Access request) to 3GPP RAN.
806,3GPP RAN sends honeycomb control signal to subscriber equipment.
In this step, honeycomb control signal carries the SSID of above-mentioned AP1, the channel of the BSSID of AP1 and AP1 work etc.
807, subscriber equipment sends probe request to AP1 on the channel of AP1 work.
808, AP1 sends probing response frame to subscriber equipment.
809, subscriber equipment access AP1.
The WLAN (wireless local area network) discover method that this enforcement provides, communication network is applicable to drive sweep, by subscriber equipment, the second measuring-signal is measured, and therefore, the present embodiment is mainly applicable to possess the subscriber equipment that Wi-Fi measures.
Fig. 9 is the structural representation of controller embodiment mono-of the present invention.The controller that the present embodiment provides, it can realize each step of the method that is applied to controller that any embodiment of the present invention provides.Concrete, the controller that the present embodiment provides specifically comprises:
Generation module 11, triggers message for generating scanning, and scanning triggers message and carries scan pattern, and scan pattern is active scan mode or drive sweep pattern;
The first sending module 12, triggers message for sending scanning to subscriber equipment, so that subscriber equipment scans at least one network access equipment of WLAN (wireless local area network) WLAN according to scan pattern.
The controller that the embodiment of the present invention provides, generate scanning triggering message for subscriber equipment after, controller sends the scanning triggering message of carrying scan pattern to subscriber equipment, triggering subscriber equipment scans near network access equipment, avoid a large number of users equipment all active scan carry out WLAN (wireless local area network) discovery and the signaling storm that causes, cause network congestion.And, for not supporting Wi-Fi to measure or the lower subscriber equipment of certainty of measurement, it can be set and only can adopt active scan mode, Wi-Fi surveying work is carried out by network access equipment, thereby obtain WLAN (wireless local area network) more accurately, finds.
Figure 10 is the structural representation of controller embodiment bis-of the present invention.As shown in figure 10, the controller of the present embodiment, on the basis of Fig. 9 controller architecture, further, also comprises:
The second sending module 13, for when scan pattern is active scan mode, to at least one network access equipment, send active scan response condition information, so that at least one network access equipment according to active scan response condition, determines whether the objective network access device as subscriber equipment.
Please refer to Figure 10, controller also comprises again:
Receiver module 14, for receiving metrical information, the first metrical information that the first measuring-signal that metrical information sends for subscriber equipment at least one network access equipment under active scan mode measures; Or, metrical information be subscriber equipment under drive sweep pattern, the second metrical information that the second measuring-signal sending at least one network access equipment measures;
Selecting module 15, for according to metrical information, is subscriber equipment select target network access equipment;
The 3rd sending module 16, for sending access indication response message at least one network access equipment.
Further, select module 15 also for: according to metrical information, and at least one information in the state of affairs information of the network state information of at least one network access equipment, subscriber equipment, be subscriber equipment select target network access equipment.
Further, the first sending module 12 is also for sending access message to subscriber equipment, and access message is carried the identification information of objective network access device, so that subscriber equipment, according to identification information, accesses objective network access device.
Further, scanning triggers message and also carries at least one information in following information: service set, basic service set identification, channel list that at least one network insertion is standby.
Figure 11 is the structural representation of subscriber equipment embodiment mono-of the present invention.The subscriber equipment that the present embodiment provides, it can realize each step of the method that is applied to subscriber equipment that any embodiment of the present invention provides.Concrete, the subscriber equipment that the present embodiment provides specifically comprises:
The first receiver module 21, the scanning triggering message sending for receiving controller, scanning triggers message and carries scan pattern, and scan pattern is active scan mode or drive sweep pattern;
Scan module 22, for scanning at least one network access equipment of WLAN (wireless local area network) WLAN according to scan pattern.
The subscriber equipment that the embodiment of the present invention provides, the scanning of carrying concrete scan pattern that subscriber equipment sends according to controller triggers message, adopt suitable scan pattern to scan the network access equipment in communication network, avoid a large amount of UE all active scan carry out WLAN (wireless local area network) and find to cause signaling storm, cause network congestion.For not supporting Wi-Fi to measure or the lower subscriber equipment of certainty of measurement, can only can adopt active scan mode, Wi-Fi surveying work is carried out by network access equipment, carry out the discovery of more accurate WLAN (wireless local area network).In addition, in the present embodiment, under active scan mode, by network access equipment, as AP measures, certainty of measurement is high, and can avoid the subscriber equipment energy consumption that measurement causes to access point to increase.
Figure 12 is the structural representation of subscriber equipment embodiment bis-of the present invention.As shown in figure 12, the subscriber equipment that the present embodiment provides, on the basis of subscriber equipment shown in Figure 11, further, also comprises:
The first sending module 23, for when scan pattern is active scan mode, sends the first measuring-signal at least one network access equipment, so that at least one network access equipment measures the first metrical information to the first measuring-signal.
Please refer to Figure 12, subscriber equipment also comprises again:
The second receiver module 24, for when scan pattern is drive sweep pattern, receives the second measuring-signal that at least one network access equipment sends, and the second measuring-signal is measured to the second metrical information;
The second sending module 25, for sending the second metrical information to controller.
Further, the first receiver module 21 also for: receive the objective network access device indication information that at least one network access equipment sends, objective network access device indication information is at least one network access equipment is according to the active scan response condition information and the first metrical information that receive, and determining can be as sending after objective network access device.
Further, the first receiver module 21 also for: receive the access message that controller sends, the identification information of objective network access device is carried in access; According to identification information, access objective network access device.
Further, scanning triggers message and also carries at least one information in following information: service set, basic service set identification, channel list that at least one network insertion is standby.
Figure 13 is the structural representation of network access equipment embodiment mono-of the present invention, and the network access equipment that the present embodiment provides can be realized each step that is applied to network access equipment when subscriber equipment in the embodiment of the present invention adopts active scan mode.Concrete, the network access equipment that the present embodiment provides comprises:
The first receiver module 31, the first measuring-signal sending under active scan mode for receiving subscriber equipment;
Measurement module 32, for measuring the first metrical information to the first measuring-signal;
Determination module 33, for according to the first metrical information, determines whether the objective network access device as subscriber equipment.
The network access equipment that the embodiment of the present invention provides, when subscriber equipment adopts active scan mode, the first measuring-signal that network access equipment sends subscriber equipment measures the first metrical information, and network access equipment determines whether can be used as the objective network access device of subscriber equipment according to the active scan response condition information of the first metrical information and controller transmission; Or network access equipment reports controller by this first metrical information, by controller, determine whether this network access equipment can be used as the objective network access device of subscriber equipment.In the present embodiment, network access equipment is measured the first measuring-signal, and certainty of measurement is high, is embodied as subscriber equipment and selects best network access equipment and can avoid the energy consumption that subscriber equipment measurement causes to increase.
Figure 14 is the structural representation of network access equipment embodiment bis-of the present invention.As shown in figure 14, the network access equipment of the present embodiment, on the basis of network access equipment shown in Figure 13, further, also comprises:
The second receiver module 34, the active scan response condition information sending for receiving controller;
Determination module 33, for according to active scan response condition and the first metrical information, determines whether the objective network access device as subscriber equipment;
Further, determination module 33 specifically for: to controller, send the first metrical information;
Receive the access indication response message that controller sends, access indication response message is that controller determines according to the first metrical information whether network access equipment can be as sending after objective network access device.
Finally it should be noted that: each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit above; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.

Claims (30)

1. a WLAN (wireless local area network) discover method, is characterized in that, comprising:
Generate scanning and trigger message, described scanning triggers message and carries scan pattern, and described scan pattern is active scan mode or drive sweep pattern;
To subscriber equipment, send described scanning and trigger message, so that described subscriber equipment scans at least one network access equipment of WLAN (wireless local area network) WLAN according to described scan pattern.
2. method according to claim 1, is characterized in that, described method also comprises:
When described scan pattern is active scan mode, to described at least one network access equipment, send active scan response condition information, so that described at least one network access equipment is according to described active scan response condition information, determine whether the objective network access device as described subscriber equipment.
3. method according to claim 1, is characterized in that, described after subscriber equipment sends described scanning triggering message, also comprises:
Receive metrical information, described metrical information is the first metrical information that the first measuring-signal that described at least one network access equipment sends under described active scan mode for described subscriber equipment measures; Or, described metrical information be described subscriber equipment under described drive sweep pattern, the second metrical information that the second measuring-signal sending for described at least one network access equipment measures;
According to described metrical information, it is described subscriber equipment select target network access equipment;
To described at least one network access equipment, send access indication response message.
4. method according to claim 3, is characterized in that, described according to described metrical information, is described subscriber equipment select target network access equipment, comprising:
According to described metrical information, and at least one information in the state of affairs information of the network state information of described at least one network access equipment, described subscriber equipment, be described subscriber equipment select target network access equipment.
5. according to the method described in claim 3 or 4, it is characterized in that, described method also comprises:
To described subscriber equipment, send access message, described access message is carried the identification information of described objective network access device, so that described subscriber equipment according to described identification information, accesses described objective network access device.
6. according to the method described in claim 1～5 any one, it is characterized in that, described scanning triggers message and also carries at least one information in following information: the service set of described at least one network access equipment, basic service set identification, channel.
7. a WLAN (wireless local area network) discover method, is characterized in that, comprising:
Receive the scanning triggering message that controller sends, described scanning triggers message and carries scan pattern, and described scan pattern is active scan mode or drive sweep pattern;
According to described scan pattern, at least one network access equipment of WLAN (wireless local area network) WLAN is scanned.
8. method according to claim 7, is characterized in that, described method also comprises:
When described scan pattern is described active scan mode, to described at least one network access equipment, send the first measuring-signal, so that described at least one network access equipment measures the first metrical information to described the first measuring-signal.
9. method according to claim 7, is characterized in that, described method also comprises:
When described scan pattern is described drive sweep pattern, receive the second measuring-signal that described at least one network access equipment sends, described the second measuring-signal is measured to the second metrical information;
To described controller, send described the second metrical information.
10. method according to claim 8, is characterized in that, described method also comprises:
Receive the objective network access device indication information that described at least one network access equipment sends, described objective network access device indication information be described at least one network access equipment according to the active scan response condition information and described the first metrical information that receive, determining can be as sending after objective network access device.
11. methods according to claim 8 or claim 9, is characterized in that, described method also comprises:
Receive the access message that described controller sends, described access message is carried the identification information of described objective network access device;
According to described identification information, access described objective network access device.
12. according to the method described in claim 7～11 any one, it is characterized in that, described scanning triggers message and also carries at least one information in following information: the service set of described at least one network access equipment, basic service set identification, channel.
13. 1 kinds of WLAN (wireless local area network) discover methods, is characterized in that, comprising:
Receive the first measuring-signal that subscriber equipment sends under active scan mode;
Described the first measuring-signal is measured to the first metrical information;
According to described the first metrical information, determine whether the objective network access device as described subscriber equipment.
14. methods according to claim 13, is characterized in that, described according to described the first metrical information, before determining whether the objective network access device as described subscriber equipment, also comprise:
Receive the active scan response condition information that controller sends;
Described according to described the first metrical information, determine whether the objective network access device as described subscriber equipment, comprising:
According to described active scan response condition and described the first metrical information, determine whether the objective network access device as described subscriber equipment.
15. methods according to claim 13, is characterized in that, described according to described the first metrical information, determine whether the objective network access device as described subscriber equipment, comprising:
To controller, send described the first metrical information;
Receive the access indication response message that described controller sends, described access indication response message is that described controller determines whether according to described the first metrical information can be as sending after objective network access device.
16. 1 kinds of controllers, is characterized in that, comprising:
Generation module, triggers message for generating scanning, and described scanning triggers message and carries scan pattern, and described scan pattern is active scan mode or drive sweep pattern;
The first sending module, triggers message for send described scanning to subscriber equipment, so that described subscriber equipment scans at least one network access equipment of WLAN (wireless local area network) WLAN according to described scan pattern.
17. controllers according to claim 16, is characterized in that, described controller also comprises:
The second sending module, for when described scan pattern is active scan mode, to described at least one network access equipment, send active scan response condition information, so that described at least one network access equipment is according to described active scan response condition information, determine whether the objective network access device as described subscriber equipment.
18. controllers according to claim 16, is characterized in that, described controller also comprises:
Receiver module, for receiving metrical information, described metrical information is the first metrical information that the first measuring-signal that described at least one network access equipment sends under described active scan mode for described subscriber equipment measures; Or, described metrical information be described subscriber equipment under described drive sweep pattern, the second metrical information that the second measuring-signal sending for described at least one network access equipment measures;
Selecting module, for according to described metrical information, is described subscriber equipment select target network access equipment;
The 3rd sending module, for sending access indication response message to described at least one network access equipment.
19. controllers according to claim 18, is characterized in that, described selection module also for:
According to described metrical information, and at least one information in the state of affairs information of the network state information of described at least one network access equipment, described subscriber equipment, be described subscriber equipment select target network access equipment.
20. according to the controller described in claim 18 or 19, it is characterized in that, described the first sending module is also for sending access message to described subscriber equipment, described access message is carried the identification information of described objective network access device, so that described subscriber equipment according to described identification information, accesses described objective network access device.
21. according to the controller described in claim 16～20 any one, it is characterized in that, described scanning triggers message and also carries at least one information in following information: the service set of described at least one network access equipment, basic service set identification, channel.
22. 1 kinds of subscriber equipmenies, is characterized in that, comprising:
The first receiver module, the scanning triggering message sending for receiving controller, described scanning triggers message and carries scan pattern, and described scan pattern is active scan mode or drive sweep pattern;
Scan module, for scanning at least one network access equipment of WLAN (wireless local area network) WLAN according to described scan pattern.
23. subscriber equipmenies according to claim 22, is characterized in that, also comprise:
The first sending module, for when described scan pattern is described active scan mode, to described at least one network access equipment, send the first measuring-signal, so that described at least one network access equipment measures the first metrical information to described the first measuring-signal.
24. subscriber equipmenies according to claim 22, is characterized in that, also comprise:
The second receiver module, for when described scan pattern is described drive sweep pattern, receives the second measuring-signal that described at least one network access equipment sends, and described the second measuring-signal is measured to the second metrical information;
The second sending module, for sending described the second metrical information to described controller.
25. subscriber equipmenies according to claim 23, is characterized in that, described the first receiver module also for:
Receive the objective network access device indication information that described at least one network access equipment sends, described objective network access device indication information be described at least one network access equipment according to the active scan response condition information and described the first metrical information that receive, determining can be as sending after objective network access device.
26. according to the subscriber equipment described in claim 23 or 24, it is characterized in that, described the first receiver module also for:
Receive the access message that described controller sends, described access message is carried the identification information of described objective network access device;
According to described identification information, access described objective network access device.
27. according to the subscriber equipment described in claim 22～26 any one, it is characterized in that, described scanning triggers message and also carries at least one information in following information: the service set of described at least one network access equipment, basic service set identification, channel.
28. 1 kinds of network access equipments, is characterized in that, comprising:
The first receiver module, the first measuring-signal sending under active scan mode for receiving subscriber equipment;
Measurement module, for measuring the first metrical information to described the first measuring-signal;
Determination module, for according to described the first metrical information, determines whether the objective network access device as described subscriber equipment.
29. network access equipments according to claim 28, is characterized in that, also comprise:
The second receiver module, the active scan response condition information sending for receiving controller;
Described determination module, for according to described active scan response condition and described the first metrical information, determines whether the objective network access device as described subscriber equipment.
30. network access equipments according to claim 28, is characterized in that, described determination module specifically for:
To controller, send described the first metrical information;
Receive the access indication response message that described controller sends, described access indication response message is that described controller determines according to described the first metrical information whether network access equipment can be as sending after objective network access device.
CN201310155545.5A 2013-04-28 2013-04-28 WLAN finds method, controller, user equipment and network access equipment Active CN104125623B (en)

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CN105916190A (en) * 2015-02-20 2016-08-31 诺基亚技术有限公司 Controlling discoverability
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