WO2014048227A1

WO2014048227A1 - Scanning method, scanning control method, user equipment, base station, and system

Info

Publication number: WO2014048227A1
Application number: PCT/CN2013/082829
Authority: WO
Inventors: 邢平平
Original assignee: 华为技术有限公司
Priority date: 2012-09-28
Filing date: 2013-09-03
Publication date: 2014-04-03
Also published as: CN103716857A; CN103716857B

Abstract

Disclosed are a scanning method, a scanning control method, a user equipment, a base station, and a system. The present invention relates to the technical field of the communications. The scanning method comprises: obtaining synchronization information of a wireless fidelity (WiFi) access point (AP) and a base station; obtaining transmission time of a beacon frame of the WiFi AP according to the synchronization information; and activating, according to the transmission time of the beacon frame, a WiFi function to scan the WiFi AP. The scanning control method comprises: sending synchronization information of a wireless fidelity (WiFi) access point (AP) and a user equipment (UE), the synchronization information being used by the UE to obtain transmission time of a beacon frame of the WiFi AP, so as to activate, according to the transmission time of the beacon frame, a WiFi function to scan the WiFi AP. The system comprises a UE and a base station. The present invention effectively reduces the scanning time and reduces power consumption of the UE.

Description

Scanning method, method for controlling scanning, user equipment, base station and system The application is filed on September 28, 2012, and the application number is CN 201210370452. X, the invention name is "scanning method, control scanning method" The priority of the Chinese patent application, the user equipment, the base station and the system, the entire contents of which are incorporated herein by reference. Technical field

The present invention relates to the field of communications technologies, and in particular, to a scanning method, a method for controlling scanning, a user equipment, a base station, and a system. Background technique

With the growth of mobile Internet services, the amount of data in wireless communication networks has proliferated, accelerating the demand for bandwidth. In order to alleviate the congestion of mobile cellular networks, network operators need to deploy more base stations to increase network capacity, but this will inevitably increase investment costs and maintenance costs. As a result, more and more network operators have chosen the way of mobile data offloading, which offloads part of the data in the mobile network to other available access technologies as a complement to the mobile network.

Currently, the most important complementary network technologies for mobile data offloading include: WiFi (Wireless Fidelity), home base station, and iMB (Integrated Mobi Le Broadcast). In order to further enhance the user experience, tight coupling of the WiFi system and 3GPP (3rd Generation Partnership Program) LTE (Long Term Evolved) is a possible solution. Among them, LTE is a mobile communication network actively researched by various vendors in the current 3GPP organization, which can reduce delay, increase user data rate, increase system capacity and coverage, and has low cost. The eNB ( evolved Node B, evolved base station) deployed in the LTE network communicates with the UE (User Equipment) through the air interface. In a tightly coupled solution between the WiFi system and the 3GPP LTE, the UE scans nearby WiF i APs (Acces s Point, access points) in an active or passive manner, performs identity authentication and establishes a connection after successful scanning, and then connects through the connection. WiFi AP transmits data. The active scanning means that the UE actively generates and sends a sounding frame, and scans the WiFi AP by receiving a sounding response frame returned by the WiFi AP. Passive scanning means that the WiFi AP periodically broadcasts the beacon Beacon frame, and the UE listens to the broadcast channel, and receives the Beacon frame to complete scanning of the WiF i AP.

If the scanning mode is passive scanning, the UE will listen to each scanned channel within the maximum period defined by the Channel Time parameter, or scan each channel to be monitored. If the scanning mode is active scanning, it is also necessary to complete the generation of the sounding frame and the subsequent processing of the collected sounding response frames during the scanning process. Therefore, the foregoing solutions all increase the scanning time of the UE and bring about power consumption problems of the UE. Summary of the invention

In order to save scanning time and reduce power consumption of the UE, the present invention provides a scanning method, a user equipment, a base station, and a system.

A first aspect of the present invention provides a scanning method, including:

Obtaining synchronization information of the wireless fidelity WiF i access point AP and the base station;

Obtaining a transmission time of a beacon frame of the WiFi AP according to the synchronization information;

The WiFi function is activated to scan the WiFi AP according to the transmission time of the beacon frame.

In a first possible implementation manner of the first aspect of the present invention, acquiring synchronization information of the wireless fidelity WiFi access point AP and the base station includes:

Receiving synchronization information of the WiF i AP and the base station that are sent by the base station through a broadcast channel or a dedicated channel.

With reference to the first aspect, or the first possible implementation manner of the first aspect, in a second possible implementation manner, obtaining a transmission time of a beacon frame of the WiFi AP according to the synchronization information includes: If the synchronization information is to indicate that the WiFi AP and the base station are synchronized, or indicate a scanning mode, or indicate a deployment mode of the WiFi AP, calculate the system according to the system frame number SFN of the base station and the target beacon frame transmission time TBTT. The transmission time of the beacon frame of the WiFi AP;

If the synchronization information is a time difference between the WiF i AP and the base station, calculating a beacon frame of the WiFi AP according to the system frame number SFN of the base station, the time difference, and the target beacon frame transmission time TBTT Launch time.

With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner, the transmitting of the beacon frame of the WiFi AP is calculated according to the system frame number SFN of the base station and the target beacon frame transmission time TBTT Time, including:

Calculate the transmission time of the beacon frame of the WiFi AP according to the following formula:

Tread-beacon (n) = TBTT-10* (n+1) mod TBTT - del ta;

The Tread_beacon (n) is the transmission time of the beacon frame of the WiFi AP, where n is the SFN of the base station, and del ta is a correction coefficient and is greater than or equal to zero.

With reference to the second possible implementation manner of the first aspect, in a fourth possible implementation manner, the information of the WiFi AP is calculated according to the system frame number SFN of the base station, the time difference, and the target beacon frame transmission time TBTT The launch time of the frame, including:

Tread-beacon (n) = TBTT- (10* (n+1) - Tdiff) mod TBTT - de l ta; where Tread_beacon (n) is the transmission time of the beacon frame of the WiFi AP, n is the The SFN of the base station, Tdiff is the time difference, and de l ta is a positive coefficient of greater than or equal to zero.

In combination with the first aspect, or any of the foregoing possible implementation manners, in a fifth possible implementation manner, the method further includes:

If the base station indicates that the scanning mode is the active scanning mode or the passive scanning mode, determining that the current scanning mode is the scanning mode indicated by the base station; or

If the base station indicates the deployment mode of the WiFi AP, when the deployment mode is that the WiFi AP is co-located with the base station, determining that the current scanning mode is the active scanning mode, when the deployment mode is When the base station is a macro base station and multiple WiF i APs are configured under the macro base station, determine that the current scanning mode is a passive scan mode;

Activating the WiFi function according to the transmission time of the beacon frame to scan the WiFi AP, specifically:

The WiFi function is activated before the transmission time of the beacon frame, and the WiFi AP is scanned according to the determined current scanning mode.

In combination with the first aspect, or any of the foregoing possible implementation manners, in a sixth possible implementation manner, the method further includes:

If the beacon frame is received, initiate a process of establishing a connection with the WiFi AP; or, if the beacon frame is not received within a specified time, turn off the WiFi function to stop

The WiFi AP scans.

A second aspect of the present invention provides a method for controlling a scan, where the method includes: transmitting synchronization information of a wireless fidelity WiFi access point AP and a base station to a user equipment UE, where the synchronization information is used by the UE to obtain a WiFi AP. The transmission time of the beacon frame is such that the WiFi function is activated to scan the WiF i AP according to the transmission time of the beacon frame.

In a first possible implementation manner of the second aspect, the sending the synchronization information of the wireless fidelity WiFi access point AP and the base station to the user equipment UE includes:

The synchronization information of the WiFi AP and the base station is sent to the UE through a broadcast channel or a dedicated channel.

With reference to the second aspect, or the first possible implementation manner of the second aspect, in a second possible implementation manner, the method further includes:

And the synchronization information is used to indicate that the WiF i AP is synchronized with the base station, or indicates a scanning mode, or indicates a deployment manner of the WiFi AP, where the UE uses the system frame number SFN and the target of the base station. The beacon frame transmission time TBTT calculates a transmission time of the beacon frame of the WiFi AP; or

The synchronization information is a time difference between the WiFi AP and the base station, and is used by the UE. Calculating a transmission time of the beacon frames of the WiFi AP according to the system frame number SFN of the base station, the time difference, and the target beacon frame transmission time TBTT.

A third aspect of the present invention provides a user equipment UE, where the UE includes:

An acquiring module, configured to acquire synchronization information of a wireless fidelity WiFi access point AP and a base station; and a processing module, configured to obtain, according to the synchronization information acquired by the acquiring module, a transmission time of a beacon frame of the WiFi AP;

And a scanning module, configured to activate a WiFi function to scan the WiFi AP according to a transmission time of the beacon frame obtained by the processing module.

In a first possible implementation manner of the third aspect of the present invention, the acquiring module is configured to: receive synchronization information of the WiFi AP and the base station that are sent by the base station by using a broadcast channel or a dedicated channel.

With reference to the third aspect, or the first possible implementation manner of the third aspect, in a second possible implementation manner, the processing module includes:

a first calculating unit, configured to: according to the synchronization information indicating that the WiFi AP and the base station are synchronized, or indicating a scanning mode, or indicating a deployment mode of the WiF i AP, according to the system frame number SFN and the target beacon of the base station The frame transmission time TBTT calculates the transmission time of the beacon frame of the WiFi AP;

a second calculating unit, configured to: if the synchronization information is a time difference between the WiFi AP and the base station, calculate a WiFi AP according to the system frame number SFN of the base station, the time difference, and the target beacon frame transmission time TBTT The launch time of the beacon frame.

With reference to the second possible implementation manner of the third aspect, in a third possible implementation manner, the first calculating unit is configured to calculate a transmission time of a beacon frame of the WiFi AP according to the following formula: Tread-beacon ( n) = TBTT-10* (n+1) mod TBTT - del ta;

In conjunction with the second possible implementation of the third aspect, in a fourth possible implementation, The second calculating unit is configured to calculate a transmission time of a beacon frame of the WiFi AP according to the following formula: Tread-beacon (n) = TBTT- (10* (n+1) - Tdiff) mod TBTT - de l ta; The Tread_beacon (n) is the transmission time of the beacon frame of the WiFi AP, where n is the SFN of the base station, Tdiff is the time difference, and de l ta is a correction coefficient and is greater than or equal to 0.

With reference to the third aspect, or the possible implementation manner of the foregoing third aspect, in a fifth possible implementation, the scanning module is further configured to:

Determining that the current scanning mode is the scanning mode indicated by the base station, if the base station indicates that the scanning mode is the active scanning mode or the passive scanning mode before the WiFi function is activated before the transmitting time of the beacon frame is activated. Or, if the base station indicates the deployment mode of the WiFi AP, when the deployment mode is that the WiF i AP is co-located with the base station, determining that the current scanning mode is the active scanning mode, where the deployment mode is When the macro base station configures multiple WiFi APs under the macro base station, determining that the current scanning mode is a passive scanning mode;

The WiFi AP is scanned according to the determined current scanning mode.

With reference to the third aspect, or the foregoing possible implementation manner of the foregoing third aspect, in a sixth possible implementation, the UE further includes:

And a establishing module, configured to initiate a process of establishing a connection with the WiF i AP if the beacon frame is received after the scanning module activates the WiFi function to scan the WiFi AP before the transmitting time of the beacon frame;

Or,

The scanning module is further configured to: if the beacon frame is not received within a specified time, shut down the W i F i function to stop scanning the WiFi AP.

A fourth aspect of the present invention provides a base station, where the base station includes:

a sending module, configured to send synchronization information of the wireless fidelity WiFi access point AP and the base station to the user equipment UE, where the synchronization information is used by the UE to obtain a transmission time of the beacon frame of the WiFi AP, according to the beacon frame The launch time activates the WiFi function to scan the WiFi AP.

In a first possible implementation manner of the fourth aspect, the sending module is used to broadcast The channel or dedicated channel transmits synchronization information of the WiFi AP and the base station to the UE. With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in a second possible implementation manner, the base station further includes:

An indication module, configured to indicate that the WiF i AP and the base station are synchronized, or indicate a scanning mode, or indicate a deployment manner of the WiFi AP, where the UE uses the system frame number SFN and the target of the base station The beacon frame transmission time TBTT calculates a transmission time of the beacon frame of the WiFi AP; or a time difference between the WiFi AP and the base station, where the UE uses the system frame number SFN of the base station, Calculating the WiF i by the time difference and the target beacon frame transmission time TBTT

The transmission time of a beacon frame of the AP.

A fifth aspect of the present invention provides a user equipment UE, where the UE includes:

a receiver, configured to acquire synchronization information of a wireless fidelity WiFi access point AP and a base station, and a processor, configured to obtain, according to the synchronization information acquired by the receiver, a transmission time of a beacon frame of the WiFi AP, according to the The transmission time of the beacon frame activates the WiFi function to scan the WiFi AP.

In a first possible implementation manner of the fifth aspect, the receiver is configured to receive synchronization information of the WiFi AP and the base station that are sent by the base station by using a broadcast channel or a dedicated channel.

With reference to the fifth aspect, or the first possible implementation manner of the fifth aspect, in a second possible implementation manner, the processor is specifically configured to:

If the synchronization information is to indicate that the WiFi AP and the base station are synchronized, or indicate a scanning mode, or indicate a deployment mode of the WiFi AP, calculate the WiF i according to the system frame number SFN of the base station and the target beacon frame transmission time TBTT. The transmission time of the beacon frame of the AP, and the WiF i function is activated to scan the WiFi AP before the transmission time of the beacon frame;

If the synchronization information is a time difference between the WiF i AP and the base station, calculating a beacon frame of the WiF i AP according to the system frame number SFN of the base station, the time difference, and the target beacon frame transmission time TBTT The time is transmitted, and the WiFi function is activated to scan the WiFi AP before the transmission time of the beacon frame. With reference to the fifth aspect, or the first possible implementation manner of the fifth aspect, in a third possible implementation manner, the processor is specifically configured to: if the base station indicates that the scanning mode is an active scanning mode or a passive scanning mode And determining that the current scanning mode is the scanning mode indicated by the base station; or, if the base station indicates the deployment mode of the WiFi AP, when the deployment mode is that the WiFi AP is co-located with the base station, determining that the current scanning mode is In the active scanning mode, when the base station is a macro base station and multiple WiF i APs are configured under the macro base station, determining that the current scanning mode is a passive scanning mode; The information obtains a transmission time of the beacon frame of the WiFi AP; and the WiFi AP is scanned according to the determined current scanning mode.

With reference to the fifth aspect, or any one of the possible implementation manners of the foregoing fifth aspect, in a fourth possible implementation, the processor is further configured to:

If the beacon frame is received, a process of establishing a connection with the WiFi AP is initiated; or, if the beacon frame is not received within a specified time, the WiFi function is turned off to stop scanning the WiFi AP.

A sixth aspect of the present invention provides a base station, where the base station includes:

a transmitter, configured to send synchronization information of the wireless fidelity WiFi access point AP and the base station to the user equipment UE, where the synchronization information is used by the UE to obtain a transmission time of a beacon frame of the WiFi AP, according to the beacon frame The launch time activates the WiF i function to scan the WiF i AP.

In a first possible implementation manner of the sixth aspect, the transmitter is configured to send, by using a broadcast channel or a dedicated channel, synchronization information of the WiF i AP and the base station to the UE.

With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, in a second possible implementation manner, the transmitter is further configured to:

Instructing the active scanning mode or the passive scanning mode to be sent to the UE; or indicating the deployment mode of the WiFi AP in the base station to the UE, where the deployment mode is that the WiF i AP is co-located with the base station, or the base station A plurality of WiFi APs are configured for the macro base station and under the macro base station.

The technical solution provided by the embodiment of the present invention has the following beneficial effects: The transmission time of the beacon frame of the WiFi AP is calculated, and the WiFi function is activated according to the transmission time to scan the WiFi AP, the scanning time is reduced, and the power consumption of the UE is reduced. DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings may be obtained based on these drawings without any creative work.

1 is a flowchart of a scanning method according to an embodiment of the present invention;

1 is a flowchart of a scanning method according to another embodiment of the present invention;

FIG. 3 is a schematic diagram of synchronization between a WiFi AP and a base station according to an embodiment of the present invention; FIG. 4 is another schematic diagram of synchronization between a WiFi AP and a base station according to an embodiment of the present invention; FIG. UE structure diagram;

6 is a structural diagram of a base station according to still another embodiment of the present invention;

FIG. 7 is a structural diagram of a UE according to another embodiment of the present invention;

FIG. 8 is a structural diagram of a base station according to another embodiment of the present invention; FIG.

FIG. 9 is a structural diagram of a system according to still another embodiment of the present invention. detailed description

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

The embodiment of the invention relates to a mobile network, and a WiFi AP is deployed in the mobile network. The mobile network includes, but is not limited to, GSM (Global System of Mobile communication), UMTS (Universal Mobile Telecommunications System), LTE, and the like. The WiFi is a WLAN (Wireless Local Access)

A standard for Network, WLAN, is a communication consisting of a wireless network card and a WiFi AP. The internet. An AP, commonly referred to as a network bridge or access point, is a bridge between a traditional wired LAN and a wireless LAN. It works like a HUB (hub) or router with a built-in wireless transmitter. The wireless network card is typically located in the user equipment UE responsible for receiving signals transmitted by the AP. The WiFi AP is an access point for mobile users to enter the wired network. It is mainly used in broadband homes, inside buildings, and inside campus. Typical distances range from tens of meters to hundreds of meters. The deployment manner of the WiFi AP in the mobile network includes but is not limited to the following two types: WiFi AP and LTE small base station co-station, or multiple WiFi APs are deployed under the LTE macro base station. The LTE small base station includes the femto cell Femto cel l or the pico cell P ico ce ll. The deployment of multiple WiFi APs in the macro base station refers to deploying multiple WiFi APs under the coverage of the macro base station.

The UE in the embodiment of the present invention includes but is not limited to: a notebook computer, a mobile phone terminal, a tablet computer, and the like. The UE may be a multimode terminal including a mobile network module and a WiFi transceiver. In general, the UE resides in the mobile network. Before the UE performs WiF i AP scanning, the WiFi function needs to be activated, that is, the WiF i transceiver is turned on, and when the scanning is finished, the WiFi transceiver is turned off to stop the WiFi AP scanning. The length of the activation time of the WiFi function in the UE determines the power consumption of the UE. The present invention reduces the power consumption of the UE by shortening the activation time of the WiFi function, and can effectively reduce the scanning time. Referring to FIG. 1 , an embodiment of the present invention provides a scanning method, including:

101: Acquire synchronization information of the wireless fidelity WiF i access point AP and the base station;

Step 102: Obtain a transmission time of a beacon frame of the WiF i AP according to the synchronization information.

103: Activate the WiFi function to scan the WiFi AP according to the transmission time of the beacon frame. In this embodiment, the beacon frame refers to a Beacon frame. Generally, the beacon frame has a transmission period of TBTT (Target Beacon Transmit ssion Times), and the base station periodically broadcasts in a TBTT period. Send a beacon frame. The beacon frame includes but is not limited to the following information: AP's MAC (Media Acces s Control) address, network name SSID (Service Set Ident if ier), supported rate, supported authentication Mode, encryption algorithm, beacon frame transmission interval, channel used, and so on.

Optionally, the beacon frame may be the next beacon frame of the WiFi AP current beacon frame, or may be the first beacon frame of the WiFi AP received by the UE before the WiFi AP communication.

Optionally, the acquiring synchronization information of the wireless fidelity WiFi access point AP and the base station includes: receiving synchronization information of the WiF i AP and the base station that are sent by the base station by using a broadcast channel or a dedicated channel.

In this embodiment, the synchronization information may be information used for synchronization between the base station and the WiFi AP, and the synchronization may be one or any of the following: time synchronization, phase synchronization, frequency synchronization, signal synchronization, clock synchronization, and frame synchronization. . For example, the WiFi AP may detect a Preamb le signal transmitted by the base station, determine a phase deviation from the base station, determine a frequency deviation from the base station according to the phase deviation, perform time synchronization using the determined phase deviation, and utilize the frequency deviation. Perform frequency synchronization. It can be the processing of the underlying hardware. The time or clock that can be called frequency synchronization and time synchronization can be in the traditional sense of the year, month, day, hour, minute or second, or the signalistic phase relationship.

Optionally, obtaining the transmission time of the beacon frame of the WiFi AP according to the synchronization information, including: if the synchronization information is to indicate that the WiFi AP and the base station are synchronized, or indicating a scanning mode, or indicating a deployment manner of the WiFi AP, And calculating, according to the system frame number SFN of the base station and the target beacon frame transmission time TBTT, a transmission time of the beacon frame of the WiFi AP;

If the synchronization information is a time difference between the WiF i AP and the base station, calculating the system according to the system frame number SFN of the base station, the time difference, and the target beacon frame transmission time TBTT

The transmission time of the WiFi AP's beacon frame.

In the present embodiment, the above time difference can be understood as one or any of the following: phase deviation, frequency deviation, signal deviation, and clock deviation. Broadly speaking, the above time can be understood as the concept of time, minute and second; in a narrow sense, time difference can be understood as the concept of signal phase, frequency, signal, frame, or clock. Optionally, calculating a transmission time of the beacon frame of the WiFi AP according to the system frame number SFN of the base station and the target beacon frame transmission time TBTT, including:

Tread-beacon (n) = TBTT-10* (n+1) mod TBTT - del ta;

Optionally, calculating a transmission time of the beacon frame of the WiF i AP according to the system frame number SFN of the base station, the time difference, and the target beacon frame transmission time TBTT, including:

Tread-beacon (n) = TBTT- (10* (n+1) - Tdiff) mod TBTT - de l ta; where Tread_beacon (n) is the transmission time of the beacon frame of the WiFi AP, n is the The SFN of the base station, Tdiff is the time difference, and de l ta is a correction coefficient and is greater than or equal to zero.

Optionally, if the base station indicates that the scanning mode is the active scanning mode or the passive scanning mode, determining that the current scanning mode is the scanning mode indicated by the base station.

Optionally, if the base station indicates the deployment mode of the WiFi AP, when the deployment mode is that the WiFi AP is co-located with the base station, determining that the current scanning mode is the active scanning mode, where the deployment mode is When the macro base station configures multiple WiFi APs under the macro base station, it determines that the current scan mode is the passive scan mode.

Optionally, the WiFi function is activated according to the transmission time of the beacon frame, and the following includes:

The WiFi function is activated before the transmission time of the beacon frame, and the WiFi AP is scanned according to the current scanning mode determined above.

In this embodiment, the UE does not need to simultaneously monitor the transmission time of the beacon frame of the WiFi AP of multiple channels, that is, it does not need to scan the WiF i AP for a long time to obtain the beacon frame of the WiFi AP, and does not need to generate the self-generated The frame is probed to obtain a beacon frame of the WiFi AP. The UE only needs to obtain the synchronization information of the WiFi AP and the base station, and calculates the beacon frame of the WiFi AP according to the synchronization information. Launch time. After obtaining the above transmission time, the UE activates the WiF i function according to the above transmission time and scans the WiFi AP, saves power and saves scanning time. For example, the UE may activate the WiFi function and scan the WiF i AP within a short time before the transmission time of the beacon frame, and the short time may be set according to an empirical value setting or a simulation result, which is not limited by the present invention. .

Optionally, after the WiFi function is activated according to the transmission time of the beacon frame, the WiFi AP is further scanned, and the method further includes:

The executor of the method provided by this embodiment is specifically a UE, and the method can be applied to various wireless communication systems, such as LTE and the like.

The above scanning method provided by the embodiment reduces the scanning time and reduces the scanning time by calculating the transmission time of the beacon frame of the WiFi AP according to the synchronization information and activating the WiFi function before the transmission time. The power consumption of the UE. For example, when the frame boundary of the WiFi AP and the base station is aligned according to the synchronization information, the transmission time of the beacon frame of the WiFi AP is calculated according to the SFN and the TBTT of the base station; when the frame boundary of the WiFi AP and the base station is not aligned, according to the SFN of the base station The time difference and TBTT calculate the transmission time of the WiFi AP's beacon frame, and a complete solution is given. Further, the current scanning mode may be determined according to the indication of the base station, so that the scanning is performed according to the manner, thereby further improving the scanning efficiency. When the beacon frame is successfully received, the connection is established. If the beacon frame is not received within the specified time, the WiFi function is turned off to stop scanning the WiFi AP, thereby further saving the power consumption of the UE.

Optionally, the sending the synchronization information of the wireless fidelity WiFi access point AP and the base station to the user equipment UE includes:

Optionally, the method for controlling scanning further includes: Indicating an active scanning mode or a passive scanning mode and transmitting to the UE; or

And indicating the deployment manner of the WiFi AP in the base station to the UE, where the deployment mode is WiFi

The AP is co-located with the base station, or the base station is a macro base station and multiple WiF i APs are configured under the macro base station.

The method for controlling scanning according to the embodiment provides a method for the UE to calculate the transmission time of the beacon frame of the WiFi AP according to the synchronization information, and activate the WiFi function to scan the WiFi AP before the transmission time. The scan time is effectively reduced, and the power consumption of the UE is reduced. Referring to FIG. 2, another embodiment of the present invention provides a scanning method, including:

201: The base station in the mobile network sends the synchronization information of the wireless fidelity WiFi access point AP and the base station to the user equipment UE.

Specifically, the base station may send the WiFi AP information to the UE through a broadcast channel or a dedicated channel, where the WiFi AP information includes synchronization information of the WiFi AP and the base station. The WiFi AP information includes but is not limited to the following information: SSID (WiFi access point identifier), channel list, scanning mode, whether the WiFi AP and the LTE small base station are co-located, and the like.

202: The UE receives synchronization information of the WiFi AP and the base station that are sent by the base station by using a broadcast channel or a dedicated channel.

Specifically, the base station may send the WiFi AP information through the broadcast channel or the dedicated channel, where the synchronization information of the WiFi AP and the base station is carried, and correspondingly, the UE may obtain the synchronization information of the WiFi AP and the base station from the received WiFi AP information. .

203: The base station indicates the active scanning mode or the passive scanning mode and sends the signal to the UE. Alternatively, the deployment mode of the WiFi AP in the base station is indicated to the UE, where the deployment mode is that the WiF i AP is co-located with the base station, or the base station is a macro base. The station configures a plurality of WiFi APs under the macro base station.

In this embodiment, the active scanning mode refers to that the UE actively generates and sends a probe frame Probe Reques t Frame, and scans the WiFi AP by receiving a probe response 返回j3⁄4 Probe Response Frame returned by the WiF i AP. The probe response frame includes but is not limited to the following information: MAC address of the AP Address, network name SSID, supported rate, supported authentication method, encryption algorithm, beacon frame transmission interval, used channel, etc. The passive scanning mode means that the WiF i AP periodically broadcasts the beacon Beacon frame, and the UE completes the scanning of the WiFi AP by receiving the Beacon frame. The active ping mode and the passive scanning mode are performed. After the scanning succeeds, the Authentive Icat ion and the associated As soc iat process are performed between the UE and the base station, and then the UE transmits data to communicate with the WiF i AP that establishes the association relationship.

If the base station indicates that the scanning mode is the active scanning mode or the passive scanning mode, the scanning mode of the base station is determined to be the scanning mode indicated by the base station; or, if the base station indicates the deployment mode of the WiFi AP, the deployment mode is the WiFi AP. When the station is co-located with the base station, it is determined that the scanning mode of the base station is an active scanning mode. When the deployment mode is configured to configure multiple WiF i APs in the macro base station, the scanning mode of the base station is determined to be a passive scanning mode.

In the scenario where the WiFi AP and the base station are co-station, the scanning mode is preferably configured as an active scanning mode, which can reduce interference. For a scene in which the WiFi AP and the base station are not co-located, that is, a scene in which multiple WiFi APs are configured under the macro base station, The scanning mode is preferably configured as a passive scanning mode.

In this embodiment, the interaction process between 201 and 202 and the interaction process with 203 and 204 may be performed in time or in synchronization, and the present invention does not limit the specific sequence.

205: The UE calculates a transmission time of the beacon frame of the WiFi AP according to the synchronization information.

This step can specifically include:

If the synchronization information indicates that the frame boundary of the WiF i AP and the base station is aligned, or indicates a scanning mode, or indicates a deployment mode of the WiFi AP, determining that the WiFi AP and the base station are synchronized according to the system frame number SFN and the target of the base station. The beacon frame transmission time TBTT calculates the transmission time of the beacon frame of the WiFi AP;

If the synchronization information is a time difference between the WiFi AP and the base station, determining that the frame boundary of the WiFi AP and the base station are not aligned, and calculating according to the system frame number SFN of the base station, the time difference, and the target beacon frame transmission time TBTT The transmission time of the WiFi AP's beacon frame.

Referring to FIG. 3, the SFN (System Frame Number) of the mobile cell where the UE is located The frame of =0) is synchronized with the Beacon frame of the WiFi AP, representing time alignment. For example, the 1024 frames of the mobile cell and the TBTT of 100 WiFi APs are aligned end to end.

In this embodiment, in the scenario that the WiFi AP and the base station are synchronized, the time of transmitting the beacon frame of the WiFi AP is calculated according to the system frame number SFN of the base station and the target beacon frame transmission time TBTT, which may include:

Tread-beacon (n) = TBTT-10* (n+1) mod TBTT - del ta;

The Tread-beacon (n) is the transmission time of the beacon frame of the WiF i AP, the TBTT is the target beacon frame transmission time, n is the SFN of the base station, and del ta is the correction coefficient and is greater than or equal to 0.

Referring to FIG. 4, when the SFN=0 frame of the mobile cell where the UE is located and the Beacon frame of the WiFi AP are not aligned in time, it can be understood that the frame boundary of the WiF i AP and the base station are not aligned.

In this embodiment, in a scenario where the frame boundary of the WiF i AP and the base station are not aligned, the transmission of the beacon frame of the WiFi AP is calculated according to the system frame number SFN of the base station, the time difference, and the target beacon frame transmission time TBTT. Time can include:

Tread-beacon (n) = TBTT- (10* (n+1) - Tdiff) mod TBTT - de l ta; where Tread-beacon (n) is the transmission time of the beacon frame of the WiF i AP, TBTT is the target Beacon frame transmission time, n is the SFN of the base station, Tdiff is the time difference, del ta is the correction coefficient and is greater than or equal to 0, in units of ms.

In the above two scenarios, the value of del ta can be set as needed. When the value is 0, the WiFi function is activated at the time of transmitting the beacon frame of the WiFi AP. In this embodiment, in consideration of the time for starting the WiFi receiver and the handover, in order to improve the efficiency and accuracy of the scanning, preferably, The value of the del ta can be set to a number greater than 0, such as 10 ms, etc., which is not specifically limited in the present invention.

206: The UE activates the WiFi function to scan the WiFi AP before the transmission time of the beacon frame. Description.

207: If the UE receives the beacon frame, initiate a process of establishing a connection with the WiFi AP; or, if the beacon frame is not received within the specified time, the WiFi function is disabled to stop scanning the WiFi AP, and the process ends. .

In the foregoing method provided by the embodiment, the synchronization information is sent by the base station, and the UE calculates the transmission time of the beacon frame of the WiFi AP according to the synchronization information, and activates the WiFi function to scan the WiFi AP before the transmission time, thereby effectively reducing the The scan time is reduced and the power consumption of the UE is reduced. According to the synchronization information, when the frame boundary of the WiFi AP and the base station is aligned, the transmission time of the beacon frame of the WiFi AP is calculated according to the SFN and the TBTT of the base station; when the frame boundary of the WiFi AP and the base station is not aligned, according to the SFN and the time difference of the base station And TBTT calculates the transmission time of the WiFi AP's beacon frame, and gives a complete solution. Further, the current scanning mode may be determined according to the indication of the base station, thereby performing scanning according to the manner, thereby further improving the scanning efficiency. When the beacon frame is successfully received, a connection is established, and if the beacon frame is not received within a specified time, the WiFi function is turned off to stop scanning the WiFi AP, thereby further saving the power consumption of the UE. Referring to FIG. 5, a further embodiment of the present invention provides a user equipment UE, including: an obtaining module 501, configured to acquire synchronization information of a wireless fidelity WiFi access point AP and a base station; and a processing module 502, configured to obtain The synchronization information acquired by the ear block 501 obtains the transmission time of the beacon frame of the WiF i AP;

The scanning module 503 is configured to perform scanning on the WiFi AP according to the activation time of the beacon frame obtained by the processing module 502.

The obtaining module 501 is configured to: receive synchronization information of the WiFi AP and the base station that are sent by the base station by using a broadcast channel or a dedicated channel.

The processing module 502 can include:

a first calculating unit, configured to: if the synchronization information is to indicate that the WiFi AP and the base station are synchronized, or indicate a scanning mode, or indicate a deployment manner of the WiFi AP, according to the system of the base station The frame number SFN and the target beacon frame transmission time TBTT calculate the transmission time of the beacon frame of the WiFi AP;

a second calculating unit, configured to: if the synchronization information is a time difference between the WiFi AP and the base station, calculate a beacon of the WiFi AP according to the system frame number SFN of the base station, the time difference, and the target beacon frame transmission time TBTT The transmission time of the frame.

Further, in an implementation manner, the first calculating unit is configured to calculate a transmission time of a beacon frame of the WiFi AP according to the following formula:

Tread-beacon (n) = TBTT-10* (n+1) mod TBTT - del ta;

Further, in another implementation manner, the second calculating unit is configured to calculate a transmission time of the beacon frame of the WiFi AP according to the following formula:

Tread-beacon (n) = TBTT- (10* (n+1) - Tdiff) mod TBTT - de l ta; where Tread-beacon (n) is the transmission time of the beacon frame of the WiF i AP, TBTT is the target The beacon frame transmission time, n is the SFN of the base station, Tdiff is the time difference, and del ta is the correction coefficient and is greater than or equal to zero.

In this embodiment, the scanning module 503 is specifically configured to:

If the base station indicates that the scanning mode is the active scanning mode or the passive scanning mode before the transmitting time of the beacon frame is activated, if the scanning mode is the active scanning mode or the passive scanning mode, the current scanning mode is determined to be the scanning mode indicated by the base station; or If the base station indicates the deployment mode of the WiFi AP, when the deployment mode is that the WiFi AP is co-located with the base station, the current scanning mode is determined to be the active scanning mode, and the deployment mode is that the base station is a macro base station and is under the macro base station. When multiple WiFi APs are configured, the current scanning mode is determined to be passive scanning mode.

The WiFi AP is scanned according to the determined current scanning mode.

In this embodiment, the UE may further include: Establishing a module, after the scanning module 503 activates the WiFi function to scan the WiF i AP before the transmitting time of the beacon frame, if the beacon frame is received, initiate a process of establishing a connection with the WiFi AP;

Or,

The scanning module 503 is further configured to: if the beacon frame is not received within a specified time, the shutdown WiFi function stops scanning the WiFi AP. The embodiment of the scanning method shown in FIG. 1 and the scanning method embodiment shown in FIG. 2 are described in detail in the method embodiment, and are not described here.

The UE provided by the foregoing embodiment calculates the transmission time of the beacon frame of the WiFi AP according to the synchronization information, and activates the WiFi function to scan the WiFi AP before the transmission time, thereby effectively reducing the scan time and reducing the UE. Power consumption. According to the synchronization information, when the frame boundary of the WiFi AP and the base station is aligned, the transmission time of the beacon frame of the WiFi AP is calculated according to the SFN and the TBTT of the base station; when the frame boundary of the WiFi AP and the base station is not aligned, according to the SFN of the base station The time difference and TBTT calculate the transmission time of the WiFi AP's beacon frame, and a complete solution is given. Further, the current scanning mode can be determined according to the indication of the base station, thereby performing scanning in this manner, further improving the scanning efficiency. When the beacon frame is successfully received, the connection is established, and if the beacon frame is not received within the specified time, the WiF i function is turned off to stop scanning the WiFi AP, thereby further saving the power consumption of the UE. Referring to FIG. 6, another embodiment of the present invention further provides a base station, including:

The sending module 601 is configured to send synchronization information of the wireless fidelity WiF i access point AP and the base station to the user equipment UE, where the synchronization information is used by the UE to obtain a transmission time of the beacon frame of the WiFi AP, according to the beacon frame. The transmitting time activates the WiFi function to scan the WiFi AP.

The sending module 601 is configured to send, by using a broadcast channel or a dedicated channel, synchronization information of the WiFi AP and the base station to the UE. Further, the base station may further include:

The indication module 602 is configured to indicate the active scanning mode or the passive scanning mode and send the signal to the UE. Alternatively, the deployment mode of the WiFi AP in the base station is indicated to the UE, where the deployment mode is that the WiFi AP is co-located with the base station, or the base station A plurality of WiFi APs are configured for the macro base station and under the macro base station.

The indication module 602 can also be used to indicate:

Synchronizing the WiFi AP with the base station, or indicating a scanning mode, or indicating a deployment manner of the WiFi AP, where the UE calculates the system frame number SFN and the target beacon frame transmission time TBTT according to the base station. The transmission time of the beacon frame of the WiFi AP; or

a time difference between the WiFi AP and the base station, where the UE calculates a beacon frame of the WiFi AP according to the system frame number SFN of the base station, the time difference, and the target beacon frame transmission time TBTT Launch time.

The base station in this embodiment may be a base station in any base station, including but not limited to base stations in GSM, UMTS, LTE, and the like.

The foregoing base station provided in this embodiment may perform the operations performed by the base station in the foregoing method embodiment. For details, refer to the description in the method embodiment, and details are not described herein.

The foregoing base station provides the base station, by sending synchronization information to the UE, so that the UE calculates the transmission time of the beacon frame of the WiFi AP according to the synchronization information, and activates the WiFi function to scan the WiFi AP before the transmission time, effectively The scan time is reduced and the power consumption of the UE is reduced. Referring to FIG. 7, a further embodiment of the present invention further provides a user equipment UE, including: a receiver 701, configured to acquire synchronization information of a wireless fidelity WiFi access point AP and a base station; and a processor 702, configured to receive The synchronization information acquired by the machine 701 obtains the transmission time of the beacon frame of the WiFi AP, and activates the WiFi function to scan the WiFi AP according to the transmission time of the beacon frame.

The receiver 701 is specifically configured to receive WiF i AP information sent by the base station by using a broadcast channel or a dedicated channel, and obtain synchronization between the WiF i AP and the base station from the WiFi AP information. Information.

The processor 702 is specifically configured to:

If the synchronization information indicates that the WiF i AP and the base station are synchronized, or indicates a scanning mode, or indicates a deployment mode of the WiFi AP, the WiFi is calculated according to the system frame number SFN and the target beacon frame transmission time TBTT of the base station. The transmission time of the beacon frame of the AP, and the WiFi function is activated to scan the WiFi AP before the transmission time of the beacon frame; or

If the synchronization information is a time difference between the WiFi AP and the base station, calculating a transmission time of the beacon frame of the WiFi AP according to the system frame number SFN of the base station, the time difference, and the target beacon frame transmission time TBTT, and The WiFi function is activated before the transmission time of the beacon frame to scan the WiF i AP.

The processor 702 is further configured to:

Correspondingly, the processor 702 scans the WiFi AP according to the determined current scanning manner.

The processor 70 ^{2 is} further configured to:

If the base station indicates that the scanning mode is the active scanning mode or the passive scanning mode, determining that the current scanning mode is the scanning mode indicated by the base station; or, if the base station indicates the deployment mode of the WiFi AP, When the WiFi AP is co-located with the base station, it is determined that the current scanning mode is the active scanning mode. When the deployment mode is that the base station is a macro base station and multiple WiFi APs are configured under the macro base station, the current scanning mode is determined as Passive scanning method;

Obtaining a transmission time of a beacon frame of the WiFi AP according to the synchronization information acquired by the receiver Between

The WiFi AP is scanned according to the determined current scanning mode. The detailed process is described in the description of the method embodiment, and is not described here.

The UE provided by the foregoing embodiment calculates the transmission time of the beacon frame of the WiFi AP according to the synchronization information, and activates the WiFi function to scan the WiFi AP before the transmission time, thereby effectively reducing the scan time and reducing the UE. Power consumption. According to the synchronization information, when the frame boundary of the WiFi AP and the base station is aligned, the transmission time of the beacon frame of the WiFi AP is calculated according to the SFN and the TBTT of the base station; when the frame boundary of the WiFi AP and the base station is not aligned, according to the SFN of the base station The time difference and TBTT calculate the transmission time of the WiFi AP's beacon frame, and a complete solution is given. Further, the current scanning mode can be determined according to the indication of the base station, thereby performing scanning in this manner, further improving the scanning efficiency. When the beacon frame is successfully received, the connection is established, and if the beacon frame is not received within the specified time, the WiF i function is turned off to stop scanning the WiFi AP, thereby further saving the power consumption of the UE. Referring to FIG. 8, another embodiment of the present invention further provides a base station, including:

The transmitter 801 is configured to send synchronization information of the wireless fidelity WiFi access point AP and the base station to the user equipment UE, where the synchronization information is used by the UE to obtain a transmission time of the beacon frame of the WiFi AP, so as to be transmitted according to the beacon frame. The time activated WiFi function scans the WiF i AP.

The transmitter 801 is specifically configured to send, by using a broadcast channel or a dedicated channel, synchronization information of the WiFi AP and the base station to the UE.

Further, the transmitter 801 is further configured to:

Instructing the active scanning mode or the passive scanning mode to be sent to the UE; or, indicating the deployment mode of the WiFi AP in the base station to the UE, the deployment mode is that the WiFi AP is co-located with the base station, or the base station is a macro base station and Multiple WiFi APs are configured under the macro base station.

Further, the base station further includes a processor: And indicating that the WiFi AP and the base station are synchronized, or indicating a scanning mode, or indicating a deployment manner of the WiFi AP, where the UE transmits the system frame number SFN and the target beacon frame according to the base station. The time TBTT calculates a transmission time of the beacon frame of the WiFi AP; or is used to indicate a time difference between the WiF i AP and the base station, where the UE uses the system frame number SFN of the base station, Calculating a transmission time of the beacon frames of the WiFi AP by using the time difference and the target beacon frame transmission time TBTT

The above-mentioned base station provided in this embodiment may perform the method provided in the foregoing method embodiment. For details, refer to the description in the method embodiment, and details are not described herein.

The foregoing base station provides the base station, by sending synchronization information to the UE, so that the UE calculates the transmission time of the beacon frame of the WiFi AP according to the synchronization information, and activates the WiFi function to scan the WiFi AP before the transmission time, effectively The scan time is reduced and the power consumption of the UE is reduced. Referring to FIG. 9, another embodiment of the present invention further provides a scanning system, including: a UE 901 and a base station 902.

The UE 901 may be the UE provided by any of the foregoing embodiments, and the base station 902 may be the base station provided by any of the foregoing embodiments. For details, refer to the foregoing embodiment, and details are not described herein.

The system provided by this embodiment may perform the method provided by any of the foregoing method embodiments. For details, refer to the description in the method embodiment, which is not described herein.

In the foregoing system, the system sends the synchronization information to the UE by using the base station, and the UE calculates the transmission time of the beacon frame of the WiFi AP according to the synchronization information, and activates the WiFi function to scan the WiFi AP before the transmission time, effectively The scan time is reduced and the power consumption of the UE is reduced. A person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to complete related hardware, the program may be For storage in a computer readable storage medium, the above mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are within the spirit and scope of the present invention, should be included in the protection of the present invention. Within the scope.

Claims

Rights request

1. A scanning method, characterized in that the method includes:

Obtain synchronization information of wireless fidelity WiFi access point AP and base station;

Obtain the transmission time of the beacon frame of the WiFi AP according to the synchronization information;

2. The method according to claim 1, characterized in that obtaining the synchronization information of the wireless fidelity WiFi access point AP and the base station includes:

Receive synchronization information between the WiFi AP and the base station sent by the base station through a broadcast channel or a dedicated channel.

3. The method according to claim 1 or 2, characterized in that: obtaining the transmission time of the beacon frame of the WiFi AP according to the synchronization information includes:

If the synchronization information indicates synchronization between the WiFi AP and the base station, or indicates a scanning mode, or indicates a deployment mode of the WiFi AP, then according to the system frame number SFN of the base station and the target beacon frame transmission time TBTT Calculate the transmission time of the beacon frame of the WiFi AP; If the synchronization information is the time difference between the WiFi AP and the base station, then according to the system frame number SFN of the base station, the time difference and the target signal The beacon frame transmission time TBTT calculates the transmission time of beacon frames of the WiFi AP.

4. The method according to claim 3, wherein calculating the transmission time of the beacon frame of the WiFi AP according to the system frame number SFN of the base station and the target beacon frame transmission time TBTT includes:

T _read — _bea∞n (n) = TBTT-10* (n+1) mod TBTT - del ta; Wherein, T _r6ad _ _bn (n) is the transmission time of the beacon frame of the WiFi AP, n is the SFN of the base station, and delta is the correction coefficient and is greater than or equal to 0.

5. The method according to claim 3, characterized in that, calculating the transmission time of the beacon frame of the WiFi AP according to the system frame number SFN of the base station, the time difference and the target beacon frame transmission time TBTT, including :

T _read — _beac . _n (n) = TBTT- (10* (n+l) - Tdi ff) mod TBTT - del ta;

Wherein, T _r6ad _ _bn (n) is the transmission time of the beacon frame of the WiFi AP, n is the SFN of the base station, Td ff is the time difference, and del ta is the positive coefficient and is greater than or equal to 0.

6. The method according to any one of claims 1 to 5, further comprising: if the base station indicates that the scanning mode is an active scanning mode or a passive scanning mode, determining that the current scanning mode is the base station indication. scanning method; or,

If the base station indicates the deployment mode of the WiFi AP, then when the deployment mode is that the WiFi AP and the base station are co-sited, it is determined that the current scanning mode is the active scanning mode. When the deployment mode is that the base station is a macro base station and is located in When multiple WiFi APs are configured under the macro base station, it is determined that the current scanning mode is passive scanning mode;

Activate the WiFi function to scan the WiFi AP according to the transmission time of the beacon frame, specifically including:

7. The method according to any one of claims 1 to 6, further comprising: if the beacon frame is received, initiating a process of establishing a connection with the WiFi AP; or, if at a specified time The beacon frame is not received within the period, turn off the WiFi function to stop Scan for WiFi APs.

8. A scanning method, characterized in that the method includes:

Send the synchronization information of the wireless fidelity WiFi access point AP and the base station to the user equipment UE. The synchronization information is used by the UE to obtain the transmission time of the beacon frame of the WiFi AP so as to activate WiFi according to the transmission time of the beacon frame. Function to scan the WiFi AP.

9. The method according to claim 8, characterized in that sending the synchronization information of the wireless fidelity WiFi access point AP and the base station to the user equipment UE specifically includes:

Send the synchronization information of the WiFi AP and the base station to the UE through a broadcast channel or a dedicated channel.

10. The method according to claim 8 or 9, characterized in that, the method further includes: the synchronization information indicates synchronization between the WiFi AP and the base station, or indicates a scanning mode, or indicates the WiFi The deployment method of the AP is used for the UE to calculate the transmission time of the beacon frame of the WiFi AP according to the system frame number SFN of the base station and the target beacon frame transmission time TBTT; or

The synchronization information is the time difference between the WiFi AP and the base station, which is used by the UE to calculate the WiFi AP based on the system frame number SFN of the base station, the time difference and the target beacon frame transmission time TBTT. The transmission time of beacon frames.

11. A user equipment UE, characterized in that the UE includes:

The acquisition module is used to obtain the synchronization information of the wireless fidelity WiFi access point AP and the base station; the processing module is used to obtain the transmission time of the beacon frame of the WiFi AP according to the synchronization information obtained by the acquisition module;

Scanning module, configured to activate according to the transmission time of the beacon frame obtained by the processing module The WiFi function scans the WiFi AP.

12. The UE according to claim 11, wherein the acquisition module is configured to: receive the synchronization information of the WiFi AP and the base station sent by the base station through a broadcast channel or a dedicated channel.

13. The UE according to claim 11 or 12, characterized in that the processing module includes:

The first calculation unit is configured to, if the synchronization information indicates synchronization between the WiFi AP and the base station, or indicates a scanning mode, or indicates a deployment mode of the WiFi AP, then according to the system frame number SFN and the target beacon of the base station Frame transmission time TBTT calculates the transmission time of the beacon frame of the WiFi AP;

A second calculation unit, configured to calculate the WiFi according to the system frame number SFN of the base station, the time difference and the target beacon frame transmission time TBTT if the synchronization information is the time difference between the WiFi AP and the base station. i AP’s beacon frame transmission time.

14. The UE according to claim 13, wherein the first calculation unit is used to calculate the transmission time of the beacon frame of the WiFi AP according to the following formula:

T _read — _bea∞n (n) = TBTT-10* (n+1) mod TBTT - del ta;

Among them, T _{read_beae} _. _n (n) is the transmission time of the beacon frame of the WiFi AP, n is the SFN of the base station, and delta is the correction coefficient and is greater than or equal to 0.

15. The UE according to claim 13, wherein the second calculation unit is used to calculate the transmission time of the beacon frame of the WiFi AP according to the following formula:

T _read _ _beacon (n) = TBTT- (10* (n+1) - Tdi ff) mod TBTT - del ta;

Wherein, T _r6ad _ _bn (n) is the transmission time of the beacon frame of the WiFi AP, n is the base SFN of the station, Tdi ff is the time difference, del ta is the positive coefficient and is greater than or equal to 0.

16. The UE according to any one of claims 11 to 15, characterized in that the scanning module is specifically used for:

Before activating the WiFi function to scan the WiFi AP before the transmission time of the beacon frame, if the base station indicates that the scanning mode is an active scanning mode or a passive scanning mode, it is determined that the current scanning mode is the scanning mode indicated by the base station; Or, if the base station indicates the deployment mode of the WiFi AP, then when the deployment mode is that the WiFi AP and the base station are co-located, it is determined that the current scanning mode is the active scanning mode, and when the deployment mode is that the base station is a macro base station And when multiple WiFi APs are configured under the macro base station, it is determined that the current scanning mode is the passive scanning mode;

Scan the WiFi AP according to the determined current scanning mode.

17. The UE according to any one of claims 11 to 16, characterized in that the UE further includes:

Establishing a module for activating the scanning module before the transmission time of the beacon frame

After the WiFi function scans the WiFi AP, if the beacon frame is received, the process of establishing a connection with the WiFi AP is initiated;

or,

The scanning module is also configured to: if the beacon frame is not received within a specified time, turn off the WiFi function to stop scanning the WiFi AP.

18. A base station, characterized in that, the base station includes:

A sending module, configured to send the synchronization information of the wireless fidelity WiFi access point AP and the base station to the user equipment UE. The synchronization information is used by the UE to obtain the transmission time of the beacon frame of the WiFi AP so that the beacon frame can be transmitted according to the beacon frame. The transmit time activates the WiFi function to scan the WiFi AP.

19. The base station according to claim 18, wherein the sending module is configured to send synchronization information of the WiFi AP and the base station to the base station through a broadcast channel or a dedicated channel.

UE.

20. The base station according to claim 18 or 19, characterized in that the base station further includes:

Indication module, used to indicate

The WiFi AP is synchronized with the base station, or indicates a scanning mode, or indicates a deployment mode of the WiFi AP, for the UE to calculate based on the system frame number SFN and target beacon frame transmission time TBTT of the base station. The transmission time of the beacon frame of the WiFi AP; or

The time difference between the WiFi AP and the base station is used by the UE to calculate the beacon frames of the WiFi AP based on the system frame number SFN of the base station, the time difference and the target beacon frame transmission time TBTT. Launch time.

21. A user equipment UE, characterized in that the UE includes:

A receiver, used to obtain the synchronization information of the wireless fidelity WiFi access point AP and the base station; A processor, used to obtain the transmission time of the beacon frame of the WiFi AP according to the synchronization information obtained by the receiver, according to the The transmission time of the beacon frame activates the WiFi function to scan the WiFi AP.

22. The UE according to claim 21, wherein the receiver is specifically configured to receive the synchronization information of the WiFi AP and the base station sent by the base station through a broadcast channel or a dedicated channel.

23. The UE according to claim 21 or 22, characterized in that the processor is specifically configured to: If the synchronization information indicates synchronization between the WiFi AP and the base station, or indicates a scanning mode, or indicates a deployment mode of the WiFi AP, then the WiFi i is calculated based on the system frame number SFN of the base station and the target beacon frame transmission time TBTT. The transmission time of the beacon frame of the AP, and activate the WiFi function to scan the WiFi AP before the transmission time of the beacon frame; or

If the synchronization information is the time difference between the WiFi AP and the base station, then calculate the beacon frame of the WiFi AP based on the system frame number SFN of the base station, the time difference and the target beacon frame transmission time TBTT. The transmission time, and activate the WiFi function to scan the WiFi AP before the transmission time of the beacon frame.

24. The UE according to claim 21 or 22, characterized in that the processor is specifically used for:

If the base station indicates that the scanning mode is the active scanning mode or the passive scanning mode, it is determined that the current scanning mode is the scanning mode indicated by the base station; or, if the base station indicates the deployment mode of the WiFi AP, then when the deployment mode When the WiFi AP and the base station are co-sited, it is determined that the current scanning mode is the active scanning mode. When the deployment mode is that the base station is a macro base station and multiple WiFi APs are configured under the macro base station, it is determined that the current scanning mode is Passive scanning mode;

Obtain the transmission time of the beacon frame of the WiFi AP according to the synchronization information obtained by the receiver;

Scan the WiFi AP according to the determined current scanning mode.

25. The UE according to any one of claims 21 to 24, characterized in that the processor is also used to:

If the beacon frame is received, the process of establishing a connection with the WiFi AP is initiated; or, if the beacon frame is not received within a specified time, the WiFi function is turned off to stop scanning the WiFi AP.

26. A base station, characterized in that, the base station includes:

Transmitter, used to send synchronization information of the wireless fidelity WiFi access point AP and the base station to the user equipment UE, the synchronization information is used for the UE to obtain the transmission time of the beacon frame of the WiFi AP so as to follow the beacon frame The transmit time activates the WiFi function to scan the WiFi AP.

27. The base station according to claim 26, wherein the transmitter is specifically configured to send the synchronization information of the WiFi AP and the base station to the UE through a broadcast channel or a dedicated channel.

28. The base station according to claim 26 or 27, characterized in that the transmitter is also used for:

Indicate the active scanning mode or the passive scanning mode and send it to the UE; or, indicate the deployment mode of the WiFi AP in the base station to the UE, and the deployment mode is that the WiFi AP and the base station are co-located, or the base station It is a macro base station and multiple WiFi APs are configured under the macro base station.