[0047] The specific implementation of the system and method for determining an indoor relative position based on the 802.11 series protocol and EBP broadcast described in the present invention will be described in detail below with reference to the accompanying drawings.
[0048] figure 1 It is a block diagram of the system structure of the present invention, including a number of EBP devices, a number of mobile terminals supporting 802.11 series protocols and a background data processing center. Multiple EBP devices form microcells with overlapping edges. By adjusting the transmit power of the EBP devices, the cell radius is controlled to the order of submeter, meter or ten meters. The EBP device has a unique and uniquely coded ESSID number, which guarantees the reception of the user's mobile terminal within the coverage area through the circular broadcast of the number. Such as figure 1 As shown by user Y in the middle, the user’s mobile terminal needs to have and turn on the WLAN function, and periodically refresh the SSID information and signal strength of nearby EBPs through the APP. By comparing the signal strength, select the most recent EBP number as the location number and compare it to the indoor location. The environmental map number points are matched to complete the relative positioning of the user's location on the map. The user's map data, EBP number corresponding location and other information comes from the background data center's regular updates. The updated data can be downloaded to the user's mobile terminal offline or online to ensure the user's positioning and navigation without a network connection.
[0049] The user sets the target location point on the mobile terminal, and the mobile terminal APP completes the navigation itinerary planning according to its own positioning results, and during the user's travel, monitors the route or dynamically adjusts the travel route according to the position of the passing point EBP. The navigation method supports the user to mark his current position, and after the position movement, according to the location EBP positioning, the previously marked position is used as the target location point to complete the navigation journey planning.
[0050] figure 1 Middle user Z can send other users through the background data processing center, such as figure 1 Middle user Y shares its location, and the information is forwarded to user Y through the background data processing center. User Y uses the location shared by user Z as the destination point, and dynamically corrects the route plan according to the current EBP location of both parties during the journey.
[0051] The background data processing center needs to dynamically update the map database and EBP location database according to actual changes, and regularly update user mobile terminal data through push, offline online download and other means.
[0052] Further, those skilled in the art understand that the mobile terminal can satisfy the technical solution of the present invention as long as the mobile terminal obtains the map information before confirming the EBP location with the EBP. For example, the mobile terminal may download the map data via the mobile Internet or the Internet immediately after installing an APP corresponding to the technical solution of the present invention, or it may be corresponding to the mobile terminal entering the indoor relative position determination system In an indoor space, the first EBP to communicate with it pushes the map data to the mobile terminal, or the control device in the mobile terminal executes the download Image 6 Downloading the map data after the step S602 does not affect the technical solution of the present invention. Further, those skilled in the art understand that the first EBP that communicates with the mobile terminal can determine whether there is corresponding map data in the mobile terminal through interaction with the control device, thereby determining whether it is necessary Download the map data, and further determine whether the map data needs to be updated, which will not be repeated here.
[0053] Those skilled in the art understand that the map data is a map file compatible with the indoor relative position determination system provided by the present invention. The mobile terminal can directly download the map data to the mobile terminal, or copy it to other storage devices and then copy it to the mobile terminal. This does not affect the technical solution of the present invention. For example, It is a desktop computer, or a memory card.
[0054] figure 1 In addition to basic functions such as positioning and navigation, the system shown has the ability to push location introduction data, including but not limited to shopping mall advertisements, shopping guides in stores, hospital medical guides, scenic spots guides, exhibition guides and other functions. Such information is updated in the background data processing center and pushed to the user's mobile terminal through online, offline and other means.
[0055] figure 2 Shown is a schematic diagram of the EBP structure, which implements downlink functions including IEEE802.11b, IEEE802.11g, and IEEE802.11n protocols. The module includes MCU control framing, MAC layer buffering, baseband processing, radio frequency transmission processing, antenna and corresponding power supply required And frequency source. As a fixed value, the device location number is bound to the device in the form of ESSID information, and the transmission power is set to be cyclically transmitted according to the requirements of the micro cell coverage.
[0056] image 3 Shown is a schematic diagram of the mobile terminal software structure. The functions include two parts of the system bottom layer and upper layer application development. The user mobile terminal processing chip completes the PHY and MAC layer processing of the WLAN, and obtains the ESSID and transmit power through the operating system to provide the indoor positioning and navigation APP. The APP periodically refreshes the SSID information and signal strength of nearby EBPs in the background. By comparing the signal strength, the nearest EBP number is selected as the location number and matched with the indoor environment map number point to complete the relative positioning of the user's location on the map.
[0057] Figure 4 It is a schematic block diagram of the functional modules of the background data processing center. The background data processing center mainly includes three databases, an indoor map database, an EBP location database and a location introduction application information database. The three databases are all related to the location to ensure that the user obtains the map location and completes the introduction data push after positioning through the EBP. In order to achieve interaction and update with user terminals, the back-end data processing center is equipped with user location information processing and sharing exchange interfaces, and performs data statistics on user location information that is willing to anonymously share, and obtains detailed information on indoor crowd distribution. The background data processing center realizes user connection through the Internet or the mobile Internet.
[0058] Figure 5 In order to use the indoor relative position determination system of the present invention to perform the method flow chart of the location service: (1) the mobile terminal obtains from the background data processing center an indoor map containing the location information of all EBPs in the system; (2) receives the base map covering the terminal The wireless signal of the 802.11 series protocol; (3) Obtain the current ESSID; (4) Match the ESSID with the local pre-stored information; (5) Position the mobile terminal at the location of the associated EBP; So far, the determination of the relative position of the user is completed. To complete the navigation to a certain indoor location, (611) the user selects the destination location; (612) completes the navigation itinerary planning according to their own positioning results; (613) the user monitors the route based on the EBP location during the travel Or dynamically adjust the route of travel; (614) reach the destination; if you want to complete the search and tracking of targets such as people, animals, or objects, there are (621) targets that share location data information with the background data management center in an active or passive manner; ( 622) The background data processing center forwards the location information to the user; (623) The user uses the shared location of the target as the destination point; (624) Completes the navigation itinerary planning based on the positioning result; (625) The user travels according to the EBP Position monitoring route or dynamically adjust travel route; (626) Complete target search and tracking.
[0059] Further, refer to the above Figure 1 to Figure 5 Example shown, Image 6 Shows a flowchart of a control method for determining the relative position of a mobile terminal according to the first embodiment of the present invention. In this embodiment, the following processing steps need to be completed in the mobile terminal in order to determine the relative position of the mobile terminal. Specifically, step S601 is performed to receive multiple EBP broadcast signals. Furthermore, those skilled in the art understand that each EBP broadcast signal is sent by one device, and when the mobile terminal is in a certain position, it can receive EBP broadcast signals sent by multiple devices. Furthermore, the EBP broadcast signal is preferably received through a first application installed in the mobile terminal. Next, proceed to step S602, analyze the multiple received EBP broadcast signals, and determine the EBP broadcast signal with the strongest signal among them. Further, those skilled in the art understand that analyzing the strength of the EBP broadcast signal can be achieved in many ways, either by a signal strength analyzer in the mobile terminal, or by an application installed in the mobile terminal. The program is realized, preferably, obtained by analyzing the first application program that receives the EBP broadcast signal.
[0060] Then, step S603 is performed, that is, the EBP corresponding to the EBP broadcast signal with the strongest signal strength is used as the positioning basis of the mobile terminal and the relative position of the mobile terminal is determined. Further, those skilled in the art understand that the EBP broadcast signal with the strongest signal strength corresponds to a fixed device, and the relative position of the mobile terminal is determined according to the position of the device. Further, those skilled in the art understand that since the EBP broadcast signals are all sent through an EBP device, and the EBP broadcast signal includes the ID of the EBP device, the EBP broadcast signal can be parsed to determine the EBP. Which EBP device the broadcast signal comes from. Furthermore, those skilled in the art understand that in the above step S602, since the EBP broadcast signal also includes the EBP broadcast signal strength information, it is possible to compare all received EBP broadcast signal strength information. Implement this step. Furthermore, those skilled in the art understand that such a comparison process can be completed by a comparator, or can be completed by a chip processing process called by an APP after the EBP broadcast signal strength information is converted into a digital signal, which will not be repeated here. .
[0061] Furthermore, those skilled in the art understand that at the same time or after performing step S602, the mobile terminal acquires an indoor map that is compatible with the indoor relative position determination system, and the indoor map contains the indoor relative position determination. All EBP location information in the system. Therefore, according to the EBP broadcast signal of the strongest signal obtained by performing step S602 analysis, a unique EBP device is determined, and the indoor map is combined to determine that the mobile terminal corresponds to the strongest signal. The relative position of the signal's EBP position.
[0062] Furthermore, those skilled in the art understand that determining the relative position of the mobile terminal can also provide the user with route planning. First, determine the destination location of the mobile terminal. Those skilled in the art understand that the destination location The point is where the user currently wants to go. It can be obtained by the user entering the destination into the application installed in the mobile terminal, or it can be obtained by the user speaking to the application installed in the mobile terminal. Obtained after entering the destination; secondly, determine the destination EBP corresponding to the destination location point. Further, those skilled in the art understand that the destination may correspond to multiple EBP signals, and preferably, the EBP with the strongest signal is selected Broadcast signal; finally, according to the current relative position of the mobile terminal and the target EBP, determine the travel route information of the mobile terminal to the target EBP. Further, those skilled in the art understand how much the mobile terminal currently corresponds to EBP signal, refer to the attachment Image 6 The steps shown in it can be seen that determining the relative position of the current mobile terminal corresponds to determining the location of the destination according to the EBP signal corresponding to the destination location point, and then planning the corresponding route. Further, refer to the above Figure 1 to Figure 6 Those skilled in the art understand that in the embodiments provided by the present invention, the EBP device is a communication device that can send at least an ESSID signal, and the ESSID signal includes the ID of the EBP device and signal strength information. Accordingly, in the mobile terminal Equipped with a receiver that can receive the ESSID signal, so that the technical purpose of the present invention can be achieved. Further, those skilled in the art understand that, preferably, the EBP device and the receiver installed in the mobile terminal adopt the 802.11 series protocol, so as to facilitate the implementation of the technical solution.
[0063] Further refer to the above Figure 1 to Figure 6 In the illustrated embodiment, those skilled in the art understand that the EBP in the foregoing indoor relative position determination system continuously broadcasts the ESSID information preset by the EBP, and the ESSID information is Image 6 An implementation of the EBP broadcast signal described in. Those skilled in the art understand that, in different embodiments, the EBP broadcast signal may be implemented in different ways, which will not be repeated here.
[0064] Further, refer to the above Figure 1 to Figure 6 In the illustrated embodiment, those skilled in the art understand that during the communication between the EBP and the mobile terminal, preferably, both the EBP and the mobile terminal may not be connected to the Internet or the Internet or the mobile Internet, but only need to communicate with the EBP. It is sufficient for mobile terminals to communicate according to the EBP broadcast signal provided by the present invention. In such an embodiment, a relatively closed environment in the room can be formed, thereby reducing dependence on external conditions.
[0065] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various deformations or modifications within the scope of the claims, which does not affect the essence of the present invention.
