WO2019192277A1 - Procédé de transfert intercellulaire de réseau utilisant des points d'accès sans fil bluetooth - Google Patents

Procédé de transfert intercellulaire de réseau utilisant des points d'accès sans fil bluetooth Download PDF

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Publication number
WO2019192277A1
WO2019192277A1 PCT/CN2019/076927 CN2019076927W WO2019192277A1 WO 2019192277 A1 WO2019192277 A1 WO 2019192277A1 CN 2019076927 W CN2019076927 W CN 2019076927W WO 2019192277 A1 WO2019192277 A1 WO 2019192277A1
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access point
mobile terminal
wifi access
background server
location information
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PCT/CN2019/076927
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English (en)
Chinese (zh)
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李东声
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天地融科技股份有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H04W12/062—Pre-authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/06—Network architectures or network communication protocols for network security for supporting key management in a packet data network
    • H04L63/061—Network architectures or network communication protocols for network security for supporting key management in a packet data network for key exchange, e.g. in peer-to-peer networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
    • H04L63/083—Network architectures or network communication protocols for network security for authentication of entities using passwords
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/04—Key management, e.g. using generic bootstrapping architecture [GBA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H04W36/322—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by location data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/029—Location-based management or tracking services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H04W64/006—Locating users or terminals or network equipment for network management purposes, e.g. mobility management with additional information processing, e.g. for direction or speed determination
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks

Definitions

  • the present invention relates to the field of wireless networks, and in particular, to a method for performing network switching by using a Bluetooth hotspot.
  • the mobile device may involve switching connections between multiple routers during the mobile process.
  • a method for processing a hotspot switch of a mobile device in a public area covered by multiple wireless hotspots is generally: when the mobile device recognizes that the strength of the wireless signal is below a certain threshold, the connection with the hotspot is disconnected. Then look for other wireless access point APs with strong signals, perform pre-connection operations (authentication, negotiation keys, etc.) with the new AP, and then establish a connection. When the user moves to the area where the signals of the two APs overlap, the situation may occur: after connecting AP1, AP1 will always be connected.
  • the mobile device After the AP2 is near, even if the signal of AP2 is stronger than the signal of AP1, as long as If the handover threshold is not reached, the mobile device will still connect to AP1 and will not switch to AP2. Moreover, after the old connection is disconnected, and the step of re-handshake negotiation is required before establishing a connection with the new AP, it is often caused that when the device moves to the edge coverage area of the wireless access point, the line is temporarily dropped, and the signal is completed. After switching, you can re-network, the switching time is slow, resulting in poor user experience.
  • An aspect of the present invention provides a method for performing network switching by using a Bluetooth hotspot, including the following steps: at least three Bluetooth base stations respectively send broadcast messages according to a preset time period, and each broadcast message carries at least the broadcast report. a transmit power value of the text and location information of the Bluetooth base station transmitting the broadcast message, wherein the locations of the at least three Bluetooth base stations are not on the same line; the mobile terminal receives the broadcast message from the broadcast report Obtaining the transmit power value, measuring the received power value of the received broadcast message, and calculating a power attenuation value according to the received power value and the transmit power value, according to a function of the power attenuation value as a function of distance Calculating a distance between the mobile terminal and each Bluetooth base station, and calculating, according to a distance between the mobile terminal and each Bluetooth base station of the at least three Bluetooth base stations, and a location information of the corresponding Bluetooth base station, The first location information of the mobile terminal sends the first location information to a background server; the background server receives The
  • Another aspect of the present invention provides another method for performing network switching by using a Bluetooth hotspot, including the following steps: at least three Bluetooth base stations respectively send broadcast messages according to a preset time period, and each broadcast message carries at least a broadcast power value of the broadcast message and identifier information of the Bluetooth base station that sends the broadcast message, where the locations of the at least three Bluetooth base stations are not on the same line; the mobile terminal receives the broadcast message, Obtaining the transmit power value and the identifier information in the broadcast packet, measuring the received power value of the received broadcast packet, and sending the transmit power value, the received power value, and the identifier information to a background server; the background server receives the transmit power value, the received power value, and the identifier information, and calculates a power attenuation value according to the received power and the transmit power, according to a function of power attenuation as a function of distance, Calculating a distance between the mobile terminal and each Bluetooth base station, and acquiring a bit of the corresponding Bluetooth base station according to the identifie
  • the current WIFI access point and the candidate WIFI access point receive the handover instruction, and complete a handover operation from the current WIFI access point to the candidate WIFI access point, where the handover area is An overlapping coverage area of the current WIFI access point and the candidate WIFI access point; or, when the location information of the mobile terminal received by the background server belongs to the handover area, the background server sends the mobile terminal to the mobile device And switching the instruction, the mobile device receives the handover instruction, and completes a handover operation from the current WIFI access point to the candidate WIFI access point.
  • FIG. 1 is a flowchart of a method for performing network switching by using a Bluetooth hotspot according to Embodiment 1 of the present invention
  • FIG. 2 is a flowchart of another method for performing network switching by using a Bluetooth hotspot according to Embodiment 2 of the present invention.
  • the embodiment provides a method for performing network switching by using a Bluetooth hotspot. As shown in FIG. 1 , the method for performing network switching by using a Bluetooth hotspot according to the embodiment includes the following steps:
  • the current location information of the mobile terminal is obtained through the Bluetooth positioning technology, including steps S101 and S102.
  • Step S101 At least three Bluetooth base stations respectively send broadcast messages according to a preset time period, where each broadcast message carries at least the transmit power value of the broadcast message and the location information of the Bluetooth base station that sends the broadcast message, where The locations of the at least three Bluetooth base stations are not on the same line.
  • the Bluetooth base station in order to reduce the power consumed by the Bluetooth base station during the positioning process, can communicate using the Bluetooth 4.0 protocol with low power consumption characteristics.
  • the coordinate values (x0, y0, z0) of the mobile terminal in the three-dimensional coordinate system that is, there are three unknown numbers x0, y0, z0 at this time, and therefore, in order to be solved by solving the equation
  • a unique solution for x0, y0, z0 requires at least three Bluetooth base stations to be set.
  • the position coordinates of each Bluetooth base station can be expressed as (x1, y1, z1), (x2, y2, z2), (x3, y3, z3), respectively.
  • the solutions of the two groups (x0, y0, z0) can be solved according to the equations listed by the positioning algorithm, and the two sets of solutions are at least three Bluetooth base stations.
  • the same line is the axis of symmetry. Therefore, in order to further ensure the uniqueness of the coordinate values of the mobile terminal, the positions of at least three Bluetooth base stations cannot be on the same line.
  • each of the Bluetooth base stations may periodically send the broadcast packets according to the same time period, and may also send the broadcast packets according to the respective different time periods, which is not specifically limited in this embodiment.
  • the same transmit power may be used for each time, or different transmit power may be used for each time, which is not specifically limited in this embodiment.
  • Step S102 The mobile terminal receives the broadcast packet, obtains the transmit power value from the broadcast packet, measures the received power value of the received broadcast packet, and calculates a power attenuation value according to the received power value and the transmit power value, according to the power attenuation value. Calculating the distance between the mobile terminal and each Bluetooth base station according to the function of the distance change, and according to the distance between the mobile terminal and each of the at least three Bluetooth base stations and the corresponding location information of the Bluetooth base station, Calculating the first location information of the mobile terminal, and transmitting the first location information to the background server.
  • the mobile terminal may be a device such as a mobile phone, a tablet computer, or a smart key device.
  • the mobile terminal can be equipped with a Bluetooth module for implementing the Bluetooth function.
  • the mobile terminal can also communicate using the Bluetooth 4.0 protocol with low power consumption characteristics like the Bluetooth base station.
  • the mobile terminal When the mobile terminal is located within the signal coverage of a specific Bluetooth base station, the broadcast message sent by the Bluetooth base station can be received. After receiving the broadcast packet, the mobile terminal may measure the received power value of the received broadcast packet, and divide the received power value by the transmit power value obtained from the broadcast packet to obtain a power attenuation value.
  • the broadcast message is a wireless signal.
  • the power attenuation during transmission is mainly caused by the transmission in the free space, and therefore, the power of each Bluetooth base station.
  • the function of the attenuation value as a function of distance is the same. Therefore, the mobile terminal only needs to store a function of the power attenuation value as a function of distance. After the mobile terminal obtains the power attenuation value of any Bluetooth broadcast message, it is only necessary to substitute the function to calculate the distance between the mobile terminal and the Bluetooth base station.
  • the power attenuation values of each Bluetooth base station vary with the distance due to different locations of different Bluetooth base stations and different obstacles in the surrounding environment.
  • the Bluetooth base station carries a function of the power attenuation value corresponding to the Bluetooth base station as a function of the distance in the broadcast message, and the mobile terminal calculates the distance between the mobile terminal and the Bluetooth base station according to the function.
  • the mobile terminal calculates the mobile terminal (x0, y0, z0) and the three Bluetooth base stations (x1, y1, z1), (x2, y2, according to the function of the power attenuation value of the Bluetooth base station as a function of the distance change.
  • the distances between z2) and (x3, y3, z3) are d1, d2, and d3, respectively, and the following equations can be listed accordingly:
  • Solving the above equations can solve the values of x0, y0, and z0, thereby determining the first location information of the mobile terminal.
  • a communication connection may be established between the mobile terminal and the background server, for example, a wireless communication connection, and the mobile terminal may send the first location information of the mobile terminal to the background server through the communication connection.
  • the mobile terminal calculates its own first location information, it proceeds to steps S103-S106.
  • Step S103 the background server receives the first location information, and stores the first location information.
  • the background server receives the first location information through a communication connection with the mobile terminal.
  • the background server may have a storage module for storing the received first location information.
  • Step S104 The background server obtains a motion track of the mobile terminal according to the first location information of the mobile terminal and the second location information of the mobile terminal, and predicts a candidate WIFI access point to which the next location to be reached by the mobile terminal belongs according to the motion track, where
  • the second location information is one or more location information sent by the mobile terminal received by the background server before the current time.
  • the background server each time the background server receives the location information sent by the mobile terminal, the received location information is stored.
  • the motion smoothing curve of the mobile terminal can be obtained by fitting the smoothing algorithm. Obtaining the tangent of a point on the motion trajectory curve, that is, the direction of motion of the mobile terminal at the point can be obtained, thereby predicting the next location to be reached by the mobile terminal, and which candidate WIFI access point the next location is. WIFI signal coverage.
  • the pre-connection process includes two parallel schemes: one is completed by the mobile terminal and the candidate WIFI access point, including steps S105a-S106a, and the other is completed by the mobile terminal and the Bluetooth hotspot corresponding to the candidate WIFI access point. , including steps S105b-S106b.
  • step S105a the background server sends a pre-connection instruction to the candidate WIFI access point and the mobile terminal.
  • Step S106a the candidate WIFI access point and the mobile terminal receive a pre-connection instruction, and the candidate WIFI access point performs a pre-connection operation with the mobile terminal by the background server, and sends the process data generated in the pre-connection operation to the background server or the candidate WIFI access.
  • Point, background server or candidate WIFI access point receives process data and saves process data.
  • a pre-connection operation is performed.
  • the pre-connection includes: the background server performs identity authentication on the mobile terminal; and the candidate WIFI access point negotiates the key with the mobile terminal.
  • the security of the communication parties is confirmed by the identity authentication, and the transmission key is negotiated in the key negotiation process.
  • the data exchanged by the communication parties may be performed by using the transmission key. Encryption to ensure communication security.
  • the identity authentication may include: the mobile terminal sends an authentication request to the candidate WIFI access point, and the authentication process is started, where the authentication request includes at least user information; the candidate WIFI access point forwards the authentication request to the authentication server; The authentication server receives the authentication request, extracts the user information from the authentication request, compares the extracted user information with the user information list in the database, finds the password information corresponding to the user information, generates a random number, and uses the random number pair password information.
  • the candidate WIFI access point Encrypting to obtain the first password information ciphertext, and sending the random number to the candidate WIFI access point; the candidate WIFI access point receiving the random number sent by the authentication server, and forwarding the random number to the mobile terminal; the mobile terminal receiving the random number, and using The random number encrypts the password information input by the user on the mobile terminal to obtain the second password information ciphertext, and sends the second password information ciphertext to the candidate WIFI access point; the candidate WIFI access point receives the second password information secret And forwarded to the authentication server; the authentication server receives the second password information And comparing, whether the second ciphertext ciphertext is the same as the first ciphertext ciphertext, and if yes, the mobile terminal is a legal device, and the packet is sent to the candidate WIFI access point to indicate that the identity authentication is passed; the candidate WIFI is connected.
  • the ingress receives a message indicating the passing of the identity authentication, and changes the port to an authorized state, allowing the mobile terminal to
  • the candidate WIFI access point and the mobile terminal performing key agreement may include: the candidate WIFI access point acquires the first random number, and sends the first random number to the mobile terminal; the mobile terminal receives the first random number, and generates the second Generating a first transmission key according to a master key, a first random number, a second random number, a candidate WIFI access point, and a device address of the mobile terminal, and performing a check calculation on the first transmission key to obtain a first school
  • the first random number and the first check value are sent to the candidate WIFI access point; the candidate WIFI access point receives the second random number and the first check value, according to the first random number, the second random number,
  • the second key is generated by the master key, the candidate WIFI access point, and the device address of the mobile terminal, and the second transmission key is verified to obtain a second check value, and the first check value and the second check are compared.
  • the verification passes, sending the confirmation information and the second check value to the mobile terminal; the mobile terminal verifies whether the second check value is correct, and if correct, the verification passes, and sends the verification to the candidate WIFI access point. by Information; the candidate WIFI access point receives the authentication pass information and saves the second transport key.
  • the process data may include any data generated by the candidate WIFI access point and the mobile terminal in the identity authentication and key agreement process, and may include, for example, a first transport key, a second transport key, and the like.
  • the background server or the candidate WIFI access point receives the process data sent by the mobile terminal and the candidate WIFI access point, and saves the process data, so that when the formal handover is performed, the process data is directly used to complete the handover, thereby shortening the handover required. time.
  • Step S105b The background server sends a pre-connection instruction to the Bluetooth base station and the mobile terminal that have a corresponding relationship with the candidate WIFI access point.
  • Step S106b The Bluetooth base station and the mobile terminal that have the corresponding relationship with the candidate WIFI access point receive the pre-connection command, perform a pre-connection operation, and send the process data generated in the pre-connection operation to the background server or the candidate WIFI access point, where The data exchanged during the pre-connection process is transmitted via Bluetooth, and the background server or candidate WIFI access point receives the process data and saves the process data.
  • the background server can store the correspondence between the WIFI access point and the Bluetooth hotspot. After determining the candidate WIFI access point, the Bluetooth hotspot corresponding to the candidate WIFI access point is found. When the pre-connection is performed by the mobile terminal and a Bluetooth hotspot corresponding to the candidate WIFI access point, the data exchanged during the pre-connection process is transmitted through the Bluetooth network.
  • Step S107 when the location information of the mobile terminal received by the background server belongs to the handover area, the background server sends a handover instruction to the current WIFI access point and the candidate WIFI access point, and the current WIFI access point and the candidate WIFI access point receive the handover instruction. And completing a handover operation from the current WIFI access point to the candidate WIFI access point, where the handover area is an overlapping coverage area of the current WIFI access point and the candidate WIFI access point; or, when the background server receives the mobile terminal When the location information belongs to the handover area, the background server sends a handover instruction to the mobile device, and the mobile device receives the handover instruction, and completes the handover operation from the current WIFI access point to the candidate WIFI access point.
  • each time the background server receives the location information sent by the mobile terminal it can determine whether the location belongs to the handover area.
  • the background server indicates the current WIFI access point and the candidate WIFI.
  • the access point initiates a handover procedure, or instructs the mobile terminal to initiate a handover procedure, and the current WIFI access point switches to the candidate WIFI access point.
  • the method for using the Bluetooth hotspot to perform network switching provides the advantage of high positioning accuracy of the Bluetooth, and analyzes the accurate position of the mobile terminal by using Bluetooth positioning, thereby obtaining the motion track of the mobile terminal, and predicting the upcoming entry according to the motion track.
  • the next WIFI access point, and pre-connect in advance, after entering the switching area, directly switch, saving the pre-connection time in the traditional handover process, thereby realizing the non-inductive handover of the mobile terminal at different WIFI access points .
  • the switching area is an optimal switching area, where the optimal switching area is an area where the signal strength of the next WIFI access point in the switching area is greater than the current WIFI access point.
  • the next WIFI access point The signal strength is greater than the signal strength of the current WIFI access point, and the signal strength of the next WIFI access point is equal to the signal strength of the current WIFI access point, and the signal strength of the next WIFI access point is less than the signal strength of the current WIFI access point. If the signal strength of the next WIFI access point is smaller than the signal strength of the current WIFI access point, the WIFI signal may be too weak, resulting in poor user experience.
  • the signal strength of the next WIFI access point in the handover area is greater than the current WIFI access point as the optimal handover area.
  • the mobile terminal switches from the weak WIFI access point to A user with a stronger signal has a better user experience.
  • the difference between the second embodiment and the first embodiment is that the location information of the mobile terminal is calculated in the background server in the embodiment, and the location information of the mobile terminal is calculated on the mobile terminal side in the first embodiment.
  • the location information of the mobile terminal is calculated in the background server in the embodiment, and the location information of the mobile terminal is calculated on the mobile terminal side in the first embodiment.
  • FIG. 2 is a flowchart of a method for performing network switching by using a Bluetooth hotspot according to Embodiment 2 of the present invention. As shown in FIG. 2, a method for performing network switching by using a Bluetooth hotspot according to Embodiment 2 of the present invention includes the following steps:
  • step S201 at least three Bluetooth base stations respectively send broadcast messages according to a preset time period, and each broadcast message carries at least the transmit power value of the broadcast message and the identity information of the Bluetooth base station that sends the broadcast message, where The locations of at least three Bluetooth base stations are not on the same line.
  • the identity information of the Bluetooth base station may be used to uniquely identify the Bluetooth base station, for example, may be the MAC address of the Bluetooth base station.
  • Step S202 The mobile terminal receives the broadcast packet, obtains the transmit power value and the identifier information from the broadcast packet, measures the received power value of the received broadcast packet, and sends the transmit power value, the received power value, and the identifier information to the background server. ;
  • Step S203 the background server receives the transmit power value, the received power value, and the identification information, and calculates a power attenuation value according to the received power and the transmit power, and calculates a function between the mobile terminal and each Bluetooth base station according to a function of the power attenuation as a function of the distance change.
  • the distance information of the corresponding Bluetooth base station is obtained according to the identification information, and the first time of the mobile terminal is calculated according to the distance between the mobile terminal and each Bluetooth base station of the at least three Bluetooth base stations and the corresponding location information of the Bluetooth base station. Location information and storing first location information;
  • the background server stores the identification information of the Bluetooth base station it manages and the location information of the corresponding Bluetooth base station. After receiving the identifier information of the Bluetooth base station, the background server may search for location information of the corresponding Bluetooth base station according to the identifier information.
  • the location of the mobile terminal is calculated by the same algorithm in the first embodiment. The difference is that the location information of the mobile location in the embodiment 1 is calculated by the mobile terminal itself. In this embodiment, the location information of the mobile terminal is calculated by the background server.
  • Step S204 The background server obtains a motion trajectory of the mobile terminal according to the first location information of the mobile terminal and the second location information of the mobile terminal, and predicts, according to the motion trajectory, a candidate WIFI access point to which the next location to be reached by the mobile terminal belongs, where
  • the second location information is one or more location information of the mobile terminal calculated by the background server before the current time;
  • the pre-connection process includes two parallel schemes: one is completed by the mobile terminal and the candidate WIFI access point, including steps S205a-S206a, and the other is completed by the mobile terminal and the Bluetooth hotspot corresponding to the candidate WIFI access point. , including steps S205b-S206b.
  • Step S205a the background server sends a pre-connection instruction to the candidate WIFI access point and the mobile terminal.
  • Step S206a The candidate WIFI access point and the mobile terminal receive a pre-connection instruction, and the candidate WIFI access point performs a pre-connection operation with the mobile terminal by the background server, and sends the process data generated in the pre-connection operation to the background server or the candidate WIFI access.
  • Point, background server or candidate WIFI access point receives process data and saves process data.
  • Step S205b The background server sends a pre-connection instruction to the Bluetooth base station and the mobile terminal that have a corresponding relationship with the candidate WIFI access point.
  • Step S206b The Bluetooth base station and the mobile terminal that have the corresponding relationship with the candidate WIFI access point receive the pre-connection command, perform a pre-connection operation, and send the process data generated in the pre-connection operation to the background server or the candidate WIFI access point, where The data exchanged during the pre-connection process is transmitted via Bluetooth, and the background server or candidate WIFI access point receives the process data and saves the process data.
  • Step S207 when the location information of the mobile terminal received by the background server belongs to the handover area, the background server sends a handover instruction to the current WIFI access point and the candidate WIFI access point, and the current WIFI access point and the candidate WIFI access point receive the handover instruction. And completing a handover operation from the current WIFI access point to the candidate WIFI access point, where the handover area is an overlapping coverage area of the current WIFI access point and the candidate WIFI access point; or, when the background server receives the mobile terminal When the location information belongs to the handover area, the background server sends a handover instruction to the mobile device, and the mobile device receives the handover instruction, and completes the handover operation from the current WIFI access point to the candidate WIFI access point.
  • the method for using the Bluetooth hotspot to perform network switching provides the advantage of high positioning accuracy of the Bluetooth, and analyzes the accurate position of the mobile terminal by using Bluetooth positioning, thereby obtaining the motion track of the mobile terminal, and predicting the upcoming entry according to the motion track.
  • the next WIFI access point, and pre-connect in advance, after entering the switching area, directly switch, saving the pre-connection time in the traditional handover process, thereby realizing the non-inductive handover of the mobile terminal at different WIFI access points .

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  • Signal Processing (AREA)
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Abstract

L'invention concerne un procédé de transfert intercellulaire de réseau utilisant des points d'accès sans fil Bluetooth, le procédé comprenant les étapes suivantes : au moins trois stations de base Bluetooth envoient des paquets de diffusion selon une période de temps prédéterminée, un terminal mobile ou un serveur dorsal calcule et acquiert, selon des valeurs de puissance de réception et des valeurs de puissance de transmission des paquets de diffusion, des valeurs d'atténuation de puissance et une fonction décrivant la manière dont les valeurs d'atténuation de puissance varient par rapport à une distance, calcule une distance entre le terminal mobile et chacune des stations de base Bluetooth, et calcule et stocke des informations de position courante du terminal mobile; le serveur dorsal acquiert, selon les informations de position précédente avant les informations de position courante du terminal mobile, une trajectoire de déplacement du terminal mobile, et prédit, selon la trajectoire de déplacement, un point d'accès Wi-Fi candidat d'une position suivante à laquelle le terminal mobile est sur le point d'arriver; le terminal mobile effectue une opération de préconnexion avec le point d'accès Wi-Fi candidat ou un point d'accès sans fil Bluetooth correspondant au point d'accès Wi-Fi candidat; et lorsque les informations de position du terminal mobile reçues par le serveur dorsal se trouvent à l'intérieur d'une région de transfert intercellulaire, achève une opération de transfert intercellulaire.
PCT/CN2019/076927 2018-04-04 2019-03-05 Procédé de transfert intercellulaire de réseau utilisant des points d'accès sans fil bluetooth WO2019192277A1 (fr)

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