Patent Publication Number: US-11643299-B2

Title: Communication system and method for elevator system

Description:
FOREIGN PRIORITY 
     This application claims priority to Chinese Patent Application No. 201710480417.6, filed Jun. 22, 2017, and all the benefits accruing therefrom under 35 U.S.C. § 119, the contents of which in its entirety are herein incorporated by reference. 
     TECHNICAL FIELD 
     The present invention belongs to the field of Elevator intelligent control technologies, and relates to a communication system and a communication method which realize the automatic completion of an elevator calling operation in a hand free mode by utilizing bluetooth interaction between a first bluetooth module as well as a second bluetooth module and a personal mobile terminal, and an elevator system using the communication system. 
     BACKGROUND ART 
     In an existing elevator system, one of the common modes of elevator calling operation is: a passenger manually presses a certain elevator calling button on an elevator calling control panel mounted in an elevator landing area to input an elevator calling request command for traveling upward or traveling downward, and then, after entering a certain elevator car, the passenger manually presses a certain floor button on a target floor registration control panel mounted in each elevator car to input a target floor. Such an elevator calling operation mode needs to be completed through manual operations; moreover, especially when the passenger&#39;s hands are incapable of performing the above-mentioned button press operation freely (for example, the passenger is carrying stuff with both hands, or the passenger has difficulty in walking and is sitting in a wheelchair), the elevator calling operation becomes difficult, affecting the passenger&#39;s experience. 
     SUMMARY OF INVENTION 
     According to a first aspect of the present invention, provided is a communication system for use in an elevator system, including: a first bluetooth module for broadcasting a first bluetooth signal and automatically establishing a first bluetooth connection with a personal mobile terminal based on the first bluetooth signal, and receiving an elevator calling request command regarding an elevator calling direction sent from the personal mobile terminal when establishing the first bluetooth connection; and a second bluetooth module for broadcasting a second bluetooth signal and automatically establishing a second bluetooth connection with the personal mobile terminal based on the second bluetooth signal, and receiving a target floor registration command sent from the personal mobile terminal when establishing the second bluetooth connection, wherein the first bluetooth module is mounted in an elevator landing area of the elevator system, and the second bluetooth module is mounted in an elevator car of the elevator system. 
     According to a second aspect of the present invention, provided is an elevator system, including: a communication system provided by the first aspect of the present invention; and an elevator controller for controlling the running of one or more elevator cars in the elevator system, wherein the elevator controller is coupled to the first bluetooth module and the second bluetooth module and controls the running of the one or more elevator cars in the elevator system at least in response to the elevator calling request command and/or the target floor registration command. 
     According to a third aspect of the present invention, provided is a communication method for performing an elevator calling operation in an elevator system, including steps of: receiving a first bluetooth signal broadcasted by a first bluetooth module mounted in an elevator landing area of the elevator system; automatically establishing a first bluetooth connection between a personal mobile terminal and the first bluetooth module based on the first bluetooth signal; sending an elevator calling request command regarding an elevator calling direction to the first bluetooth module; disconnecting the first bluetooth connection; after disconnecting the first bluetooth connection, receiving a second bluetooth signal broadcasted by a second bluetooth module mounted in an elevator car of the elevator system; automatically establishing a second bluetooth connection between the personal mobile terminal and the second bluetooth module based on the second bluetooth signal; the personal mobile terminal sending a target floor registration command to the second bluetooth module; and disconnecting the second bluetooth connection. 
     According to a fourth aspect of the present invention, provided is a communication method for performing an elevator calling operation in an elevator system, wherein a first bluetooth module mounted in an elevator landing area of the elevator system broadcasts a first bluetooth signal, and a second bluetooth module mounted in an elevator car of the elevator system broadcasts a second bluetooth signal, and the method includes steps of: the first bluetooth signal being received by a personal mobile terminal near the first bluetooth module; automatically establishing a first bluetooth connection between the personal mobile terminal and the first bluetooth module based on the first bluetooth signal; the first bluetooth module receiving an elevator calling request command regarding an elevator calling direction sent from the personal mobile terminal; disconnecting the first bluetooth connection; the second bluetooth signal being received by the personal mobile terminal near the second bluetooth module; automatically establishing a second bluetooth connection between the personal mobile terminal and the second bluetooth module based on the second bluetooth signal; the second bluetooth module receiving a target floor registration command sent from the personal mobile terminal; and disconnecting the second bluetooth connection. 
     According to a fifth aspect of the present invention, provided is a personal mobile terminal which is configured to be able to receive a first bluetooth signal broadcasted by a first bluetooth module mounted in an elevator landing area of the elevator system and be able to receive a second bluetooth signal broadcasted by a second bluetooth module mounted in an elevator car of the elevator system, wherein the personal mobile terminal includes: a bluetooth connection management module for successively automatically establishing a first bluetooth connection with the first bluetooth module and a second bluetooth connection with the second bluetooth module respectively based on the first bluetooth signal and the second bluetooth signal; a first command sending module for automatically sending an elevator calling request command regarding an elevator calling direction to the corresponding first bluetooth module when the first bluetooth connection is established; and a second command sending module for automatically sending a target floor registration command to the corresponding second bluetooth module when the second bluetooth connection is established. 
     According to a sixth aspect of the present invention, provided is a personal mobile terminal, including: a memory, a processor and a computer program that is stored in the memory and can run on the processor, wherein the processor realizes steps in the communication method provided by the third aspect of the present invention when executing the program. 
     According to a seventh aspect of the present invention, provided is a computer readable storage medium storing a computer program thereon, wherein the program is executed by a processor to realize steps of the method provided in the third aspect of the present invention. 
     According to the description and accompanying drawings below, the above features and operations of the present invention will become more obvious. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The detailed description below in conjunction with the accompanying drawings will make the above-mentioned and other objects and advantages of the present invention more complete and clearer, wherein identical or similar elements are expressed in identical labels. 
         FIG.  1    is a schematic diagram of a communication system for use in an elevator system according to one embodiment of the present invention. 
         FIG.  2    is a schematic diagram of an application scenario of a communication system according to one embodiment of the present invention. 
         FIG.  3    is a schematic diagram of another application scenario of a communication system according to one embodiment of the present invention. 
         FIG.  4    is a structural schematic diagram of an elevator calling control panel according to one embodiment of the present invention. 
         FIG.  5    is a structural schematic diagram of a target floor registration control panel according to one embodiment of the present invention. 
         FIG.  6    is a flowchart of a communication method for performing an elevator calling operation according to one embodiment of the present invention. 
         FIG.  7    is a structural schematic diagram of modules of a personal mobile terminal according to one embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION 
     The present invention will now be described more completely with reference to the accompanying drawings, where exemplary embodiments of the present invention are shown. However, the present invention can be implemented in many different forms and should not be understood as limitations to the embodiments elaborated here. On the contrary, these embodiments are provided so that the present disclosure becomes more thorough and complete, and fully conveys the concept of the present invention to a person skilled in the art. 
     Some block diagrams shown in the accompanying drawings are functional entities and are not necessarily corresponding to physically or logically independent entities. These functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different processing apparatuses and/or microcontroller apparatuses. 
       FIG.  1    shows a schematic diagram of a communication system for use in an elevator system according to one embodiment of the present invention. The communication system of the embodiments of the present invention is described below in conjunction with the application scenarios of  FIG.  2    and  FIG.  3   . 
     The communication system  10  of the embodiments of the present invention is applied in a building which is mounted with an elevator system  100 . The elevator system  100  includes a plurality of elevator cars  110  traveling up and down in hoistways of the building.  FIG.  1    shows two of the elevator cars, i.e.,  110 - 1  and  110 - 2 . The traveling or stopping of each elevator car  110  in the hoistways, namely each elevator car  110 , is controlled by an elevator controller  140  in the elevator system  100 , the particular control mode or control principle of the elevator controller  140  over one or more elevator cars  110  is not restrictive, and the particular structure or arrangement manner, etc. of the elevator controller  140  is not restrictive either. Generally, the elevator controller  140  needs to acquire an elevator calling request command from each elevator landing area  410 , and acquire target floor registration information about a passenger, so as to control the operation of the elevator based on them, for example, performing scheduling control over each elevator car  110 . 
     In order to acquire the elevator calling request command from each elevator landing area  410 , a first bluetooth module  120  is arranged in the communication system  10 ; the first bluetooth module  120  can be mounted in each elevator landing area  410  of the elevator system  100  (as shown in  FIG.  3   ), for example, the first bluetooth module  120 - 1  is mounted in the elevator landing area  410 - 1 , the first bluetooth module  120 - 2  is mounted in the elevator landing area  410 - 2 , and the first bluetooth module  120 - 3  is mounted in the elevator landing area  410 - 3 . It should be understood that each elevator landing area  410  may be mounted with one or more first bluetooth modules  120 , so that the first bluetooth signal sent out by the first bluetooth module  120  can substantially effectively cover each elevator landing area  410 . 
     In one embodiment, the first bluetooth module  120  can be integratedly arranged in an elevator calling control panel  12  of the elevator system  100 , wherein the elevator calling control panel  12  is generally mounted at two sides of the landing door of the elevator landing area  410 , and the elevator calling control panel  12  can be provided with for example an “upward” or “downward” elevator calling button, so as to realize the manual input of an elevator calling request command based on the elevator calling control panel  12 . The particular integration and arrangement manner of the first bluetooth module  120  with respect to the elevator calling control panel  12  will be described thereafter in conjunction with  FIG.  4   . 
     In one embodiment, the first bluetooth module  120  can particularly be a Bluetooth Low Energy (BLE) module. The first bluetooth signal broadcast or transmitted all along or persistently by the first bluetooth module  120  can substantially effectively cover the elevator landing area  410  where it is located. The first bluetooth signal can, for example, be correspondingly a BLE signal, which can include a wake-up signal for waking up a personal mobile terminal  200 , or further include a data signal that reflects a universally unique identifier (UUID) of the first bluetooth module  120  and/or the floor location information about where the first bluetooth module  120  is located. The particular signal form of the first bluetooth signal is not restrictive. 
     In one embodiment, each personal mobile terminal  200  is configured to be able to automatically wake up from a sleep mode based on the received wake-up signal. For example, when a passenger carrying a personal mobile terminal  200  walks towards the elevator landing area  410 , the personal mobile terminal  200  in a sleep mode will be able to receive a first bluetooth signal broadcasted by the first bluetooth module  120  (if the distance is close enough), especially a wake-up signal. At this moment, the personal mobile terminal  200  will be able to wake up from the sleep mode based on the wake-up signal, so as to make preparation for the automatic establishment of a first bluetooth connection. 
     It should be noted that when the personal mobile terminal  200  is in a sleep mode, it can receive a bluetooth signal, but it cannot automatically establish a bluetooth connection with the first bluetooth module  120 /second bluetooth module  130 , etc., and cannot automatically send an elevator calling request command or a target floor registration command either. 
     Each personal mobile terminal  200  can determine the signal strength of the first bluetooth signal received thereby, and in one embodiment, the personal mobile terminal  200  is configured with a received signal strength indicator (RSSI) for determining the signal strength of the first bluetooth signal or any other bluetooth signals received thereby. 
     In another embodiment, the first bluetooth module  120  may not broadcast a wake-up signal, and when the personal mobile terminal  200  cannot receive a wake-up signal, each personal mobile terminal  200  in sleep mode can also automatically wake up from a sleep mode when the signal strength of the first bluetooth signal received changes from relatively weak (e.g. 0) to equal to or greater than a first strength value. 
     Generally, the signal strength of the first bluetooth signal attenuates with the broadcast distance thereof, and therefore, the personal mobile terminal  200  that receives the first bluetooth signal can substantially determine the distance from the personal mobile terminal  200  to the first bluetooth module  120  according to the signal strength of the first bluetooth signal. It is to be understood that the distance changes dynamically as the passenger walks in the elevator landing area  410 . 
     Again, as shown in  FIG.  1    and  FIG.  3   , the communication system  10  further includes a plurality of second bluetooth modules  130 , and each second bluetooth module  130  is mounted in each elevator car  110 , for example, one second bluetooth module  130 - 1  is arranged in the elevator car  110 - 1 , and one second bluetooth module  130 - 2  is arranged in the elevator car  110 - 2 . In one embodiment, the second bluetooth module is mounted on a target floor registration control panel  13  in the elevator car  110  (as shown in  FIG.  5   ) and is integratedly arranged on the target floor registration control panel  13 . The particular integration and arrangement manner of the second bluetooth module  130  with regard to the target floor registration control panel  13  is described thereafter in conjunction with  FIG.  5   . 
     The second bluetooth module  130  can particularly be a Bluetooth Low Energy (BLE) module. The second bluetooth signal broadcast or transmitted all along or persistently by the second bluetooth module  130  can substantially effectively cover the area in the elevator car  110  where it is installed. The first bluetooth signal can, for example, correspondingly be a bluetooth low energy signal, which can include a wake-up signal for waking up a personal mobile terminal  200  or can further include a data signal that reflects the UUID of the second bluetooth module  130  and/or the floor location information about where the second bluetooth module  130  is located. The particular signal form of the second bluetooth signal is not restrictive. However, it should be understood that it is possible to distinguish the second bluetooth signal from the first bluetooth signal by setting the particular signal form and/or signal strength of the second bluetooth signal and enable the personal mobile terminal  200  that receives the first bluetooth signal and/or the second bluetooth signal to distinctively recognize them. 
     Each personal mobile terminal  200  can determine the signal strength of the second bluetooth signal received thereby, and in one embodiment, the personal mobile terminal  200  is configured with a received signal strength indicator (RSSI) for determining the signal strength of the second bluetooth signal or any other bluetooth signals received thereby. Generally, the signal strength of the second bluetooth signal attenuates with the broadcast distance thereof, and therefore, the personal mobile terminal  200  that receives the second bluetooth signal can substantially determine the distance from the personal mobile terminal  200  to the second bluetooth module  120  according to the signal strength of the second bluetooth signal. It is to be understood that the distance changes dynamically as the passenger walks into the elevator car  110 . 
     It should be noted that each first bluetooth module  120  and second bluetooth module  130  in the communication system  10  are coupled to an elevator controller  140 , for example, they are coupled to the elevator controller  140  respectively through the elevator calling control panel  12  and the target floor registration control panel  13 ; therefore, the elevator calling request command and the elevator calling request command respectively received by the first bluetooth module  120  and the second bluetooth module  130  can be transmitted to the elevator controller  140 . 
     Again, as shown in  FIG.  1    to  FIG.  3   , the communication system  10  further includes a personal mobile terminal  200  carried by a passenger, for example, personal mobile terminals  200 - 1  and  200 - 2  respectively carried by two passengers. Each personal mobile terminal  200  can establish a first bluetooth connection  320  with the first bluetooth module  120 , and each personal mobile terminal  200  can establish a second bluetooth connection  330  with the second bluetooth module  130 . 
     The personal mobile terminal  200  can be various smart terminals with a bluetooth connection function that are convenient for passengers to carry. For example, the personal mobile terminal  200  can be a smart phone, a wearable smart device (e.g., a smart bracelet), a personal digital assistant (PDA), etc., on which a corresponding application program (e.g. an APP) can be mounted to realize its function. 
     When a first bluetooth module  120  broadcasts a first bluetooth signal, a personal mobile terminal  200  carried by a passenger near the first bluetooth module  120  will be able to automatically receive the first bluetooth signal, and based on the first bluetooth signal, the personal mobile terminal  200  automatically establishes a first bluetooth connection  320  with the corresponding first bluetooth module  120 ; moreover, when establishing the first bluetooth connection, the personal mobile terminal  200  sends an elevator calling request command regarding an elevator calling direction (e.g., a “ travel upward” or “ travel downward” elevator calling request command), the first bluetooth module  120  receives the elevator calling request command regarding the elevator calling direction sent from the personal mobile terminal  200 , and the first bluetooth module  120  can further send the elevator calling request command to the elevator controller  140 , so that the elevator controller  140  controls the running of one or more elevator cars  110  in the elevator system  100  based on the elevator calling request command. The elevator calling request command automatically sent by the personal mobile terminal  200  can replace the elevator calling request command inputted by manually pressing the elevator calling button; moreover, the above process can be automatically realized without the need for the passenger to operate the personal mobile terminal  200  and is easy and convenient to realize. 
     Taking the application scenario shown in  FIG.  2    as an example, when two passengers, for example, enters the elevator landing area  410  (e.g., a waiting area in a lobby), the personal mobile terminal  200 - 1  or  200 - 2  (e.g. a cell phone, whether in hand or in a hand bag) carried by them will automatically sense a first bluetooth signal sent by a first bluetooth module  120  mounted in the elevator landing area  410  (the personal mobile terminal  200 - 1  or  200 - 2  is close enough to the first bluetooth module  120 ), and thus establish a handshake connection with the first bluetooth module  120  based on the first bluetooth signal, namely establishing a first bluetooth connection  320 ; the personal mobile terminal  200 - 1  or  200 - 2  automatically sends an elevator calling request command regarding an elevator calling direction, and thus automatically completes the elevator calling request command without the need for the passenger to manually press the elevator calling button mounted on the elevator calling control panel  12  or manually operate the personal mobile terminal  200 - 1  or  200 - 2 . Therefore, the present invention realizes that a passenger automatically inputs an elevator calling request command in the elevator system  100  in a hand free mode, greatly enhancing the passenger&#39;s experience. 
     It should be noted that each first bluetooth module  120  establishes a first bluetooth connection  320  with only one personal mobile terminal  200  at a certain moment, and each first bluetooth module  120  can successively establish a first bluetooth connection  320  with personal mobile terminals  200  carried by a plurality of passengers near the first bluetooth module  120 . After establishing a first bluetooth connection  320  with the first bluetooth module  120  and sending a corresponding elevator calling request command, each personal mobile terminal  200  will actively disconnect the first bluetooth connection  320  so as to make preparation for the automatic establishment of a first bluetooth connection  320  between the first bluetooth module  120  and the personal mobile terminal  200  of the next passenger. In one embodiment, the first bluetooth module  120  is configured to return a first confirmation message to a corresponding personal mobile terminal  200  after receiving an elevator calling request command, and the first confirmation message indicates that the elevator calling request command is successfully accepted by the elevator system  100 ; and the personal mobile terminal  200  is configured to actively disconnect the first bluetooth connection  320  based on the first confirmation message received. 
     It should be noted that the “elevator calling request command regarding an elevator calling direction” does not contain the target floor information about the passenger, or the target floor information is not recognized or used by the elevator controller  140  even if it is contained. Therefore, in one embodiment of the present invention, a second bluetooth connection with the personal mobile terminal  200  is also established in dependence on the second bluetooth module  130 . 
     Again, as shown in  FIG.  1   , when a second bluetooth module  130  broadcasts a second bluetooth signal, a personal mobile terminal  200  carried by a passenger near the second bluetooth module  130  will continue to be able to automatically receive the second bluetooth signal (at this moment, the first bluetooth connection previously established between the personal mobile terminal  200  and the first bluetooth module  120  has already been disconnected), and based on the second bluetooth signal, the personal mobile terminal  200  automatically establishes a second bluetooth connection  330  with the corresponding second bluetooth module  130 ; moreover, when establishing the second bluetooth connection  330 , the personal mobile terminal  200  sends a target floor registration command about target floor information, the second bluetooth module  130  receives an elevator calling request command regarding an elevator calling direction sent from the personal mobile terminal  200 , and the second bluetooth module  130  can further send the target floor registration command to the elevator controller  140 , so that the elevator controller  140  controls the running of one or more elevator cars  110  in the elevator system  100  based on the target floor registration command. The target floor registration command automatically sent by the personal mobile terminal  200  can replace the target floor registration command inputted by manually pressing the floor button; moreover, the above process can be automatically realized without the need for the passenger to operate the personal mobile terminal  200 , and is likewise easy and convenient to realize. 
     Taking the application scenario shown in  FIG.  3    as an example, when a passenger enters the elevator car  110  for example, the personal mobile terminal  200  (e.g. a cell phone, whether in hand or in a hand bag) carried by him will automatically sense a second bluetooth signal sent by a second bluetooth module  130  mounted on the elevator car  110 , and thus establish a handshake connection with the second bluetooth module  130  based on the second bluetooth signal, namely establishing a second bluetooth connection  330 ; the personal mobile terminal  200  automatically sends a target floor registration command containing target floor information, and thus automatically completes the target floor registration command without the need for the passenger to manually press the floor button mounted on the target floor registration control panel  13  or manually operate the personal mobile terminal  200 . Therefore, the present invention realizes that a passenger automatically inputs a target floor registration command in the elevator system  100  in a hand free mode, greatly enhancing the passenger&#39;s experience. 
     It should be noted that each second bluetooth module  130  establishes a second bluetooth connection  330  with only one personal mobile terminal  200  at a certain moment, and each second bluetooth module  130  can successively establish a second bluetooth connection  330  with personal mobile terminals  200  carried by a plurality of passengers near the second bluetooth module  130 . After establishing a second bluetooth connection  330  with the second bluetooth module  130  and sending a corresponding target floor registration command, each personal mobile terminal  200  will actively disconnect the second bluetooth connection  330  so as to make preparation for the establishment of a second bluetooth connection  330  between the second bluetooth module  130  and the personal mobile terminal  200  of the next passenger. In one embodiment, the second bluetooth module  130  is configured to return a second confirmation message to a corresponding personal mobile terminal  200  after receiving the target floor registration command, and the second confirmation message indicates that the target floor registration command is successfully accepted by the elevator system  100 ; and the personal mobile terminal  200  is configured to actively disconnect the second bluetooth connection  330  based on the second confirmation message received. 
     It should be understood that the above-mentioned process from establishing a first bluetooth connection to disconnecting the first bluetooth connection can be completed in a short time, and likewise, the above-mentioned process from establishing a second bluetooth connection to disconnecting the second bluetooth connection can also be completed in a short time, for example within a time range in the order of magnitude of milliseconds, so that one first bluetooth module  120  or second bluetooth module  130  can successively achieve a first bluetooth connection or a second bluetooth connection with many personal mobile terminals  200  in a short time, and the many personal mobile terminals  200  can complete an elevator calling operation substantially at the same time in a short time period. 
     It can be known in conjunction with the application scenarios shown in  FIG.  2    and  FIG.  3    that in the process that a certain passenger enters the lobby of a building and arrives at a target floor, as long as he/she carries a personal mobile terminal  200 , he/she can take an elevator to the target floor without performing any operation, thereby greatly enhancing the passenger&#39;s experience. 
     It should be further noted that in the communication system  10  of the embodiments of the present invention, an elevator calling request command regarding an elevator calling direction and a target floor registration command are successively sent through a personal mobile terminal  200 ; moreover, they are also respectively transmitted to the first bluetooth module  120  and the second bluetooth module  130  successively based on the automatically established first bluetooth connection  320  and second bluetooth connection  330 , realizing the separate operation of the input of the elevator calling request command regarding the elevator calling direction and the input of the target floor registration command. This elevator calling operation mode realized in the communication system  10  distinctively differs from another elevator calling operation mode, that is, automatically sending or automatically inputting an elevator calling request command regarding an elevator calling direction and target floor information once at the same time. In this elevator calling operation mode realized by the communication system  10  of the present application, when the elevator controller  140  of the elevator system  100  is performing scheduling control, it will not be and is not necessarily limited to assign a certain specified elevator car  110  to a passenger corresponding to a certain personal mobile terminal  200 ; therefore, when the passenger is waiting for an elevator at a certain elevator landing area  410 , he/she will not need to take out the personal mobile terminal  200  to watch it and learn serial number information, etc. about the assigned elevator car  110 , and as long as an elevator car  110  of which the running direction is consistent with the elevator calling direction arrives and the passenger walks in the elevator car  110 , the registration of the target floor can be automatically realized. The whole process of taking the elevator completely eliminates the need for hand operation and fully realizes the effect of hand free. 
     While as a comparison, another elevator calling operation mode mentioned above obviously has the following deficiencies relative to the present application: in the first aspect, the elevator controller needs to perform scheduling control to assign a specified elevator car for the passenger and automatically register the target floor in the elevator car, and therefore, the serial number of a certain elevator car assigned needs to be sent to the passenger, and the passenger needs to watch and learn the serial number information about the assigned elevator car  110 , thereby guiding the passenger to walk into the corresponding assigned elevator car, which has a high demand on the passenger but also realizes the effect of hand free; in the second aspect, once the passenger walks into a wrong elevator car (i.e., having failed to take the specified elevator car, which is easy to happen), the passenger needs to input target floor information by manually pressing the floor button in the elevator car, which is difficult to actually realize the effect of hand free; and in the third aspect, once the passenger walks into a wrong elevator car, the specified elevator car has already been registered with a target floor, and the specified elevator car will continue to operate according to the originally registered target floor information, enormously affecting the overall operating efficiency of the elevator system. 
     Moreover, the elevator system  100  of the embodiments of the present invention can be conveniently realized by reconstructing an existing elevator system, and has a low reconstruction cost, for example, arranging a first bluetooth module  120  of the present application on the elevator calling control panel by way of expansion, and arranging a second bluetooth module  130  of the present application on the target floor registration control panel by way of expansion, which can rapidly realize the reconstruction of an existing elevator with low costs. Below is the specific description of how to arrange the first bluetooth module  120  and the second bluetooth module  130  in the communication system  10  of the present invention in conjunction with  FIG.  4    and  FIG.  5   . 
     Referring to  FIG.  4   , the first bluetooth module  120  of the embodiments of the present invention is integrated on the elevator calling control panel  12  of an elevator  100 . The elevator calling control panel  12  is generally mounted in the elevator landing area  410 , and in one embodiment, the elevator calling control panel  12  is connected with the elevator controller  140  via a bus, and an RSL (Remote Serial Link) communication connection is established between the elevator calling control panel  12  and the elevator controller  140  of the elevator system  100  based on, for example but not limited to, the RSL protocol; correspondingly, for example an RSL processor  129  can be arranged in the elevator calling control panel  12 , and the RSL processor  129  can not only receive an elevator calling request command from the first bluetooth module  120 , but also can receive an elevator calling request command corresponding to pressing an elevator calling button on the elevator calling control panel  12 , and the elevator calling request command is processed according to the RSL protocol and then sent to the elevator controller  140 . 
     The first bluetooth module  120  can particularly be realized by a bluetooth processor  121 , a memory  124  and a bluetooth antenna  123 , etc. The bluetooth antenna  123  can be used for receiving and broadcasting a bluetooth signal (for example, broadcasting a first bluetooth signal), and a filter  122  can be arranged between the bluetooth antenna  123  and the bluetooth processor  121  to filter the bluetooth signals. A corresponding program module can be configured or mounted on the memory  124  to realize the function of the first bluetooth module  120  of the present invention, and the memory  124  can also set or store, for example, the UUID of the first bluetooth module  120  and/or the floor location information about where the first bluetooth module  120  is located, etc. The bluetooth processor  121  of the first bluetooth module  120  can establish a corresponding communication connection with the RSL processor  129  of the elevator calling control panel  12  while working, for example a serial port connection established based on a Universal Asynchronous Receiver/Transmitter (UART). When the first bluetooth module  120  is working, the bluetooth processor  121  and the RSL processor  129  shake hands and constantly perform communication connection verification. As such, an elevator calling request command obtained by the first bluetooth module  120  can be transmitted, in real time, to the RSL processor  129  of the elevator calling control panel  12  for processing, and then be sent, in real time, to the elevator controller  140 . It is to be understood that when transmitting the elevator calling request command to the RSL processor  129 , the first bluetooth module  120  can also transmit, for example, the UUID and/or floor location information, etc. pre-stored in the memory  124 . 
     In one embodiment, the elevator calling request command, etc. received by the first bluetooth module  120  can be recorded in the memory  140 , the bluetooth processor  121  of the first bluetooth module  120  can send out an instruction to the RSL processor  129 , and then further to the elevator controller  140 , so as to read information stored in the elevator controller  140  or the elevator system  100 , e.g., running state information, running historical status information, repairing or maintenance record information, and so on, which can be the results of beforehand analysis and processing; after obtaining these pieces of information, the first bluetooth module  120  can wirelessly transmit these pieces of information to a digital terminal (which can be for example a cell phone, a personal digital assistant) carried by a staff such as a maintenance staff through the bluetooth antenna  123 , and at this moment, the digital terminal has already been authorized to establish a bluetooth connection with the first bluetooth module  120 . Consequently, it is convenient for the maintenance staff to rapidly and conveniently acquire some information about the elevator system  100  at the elevator landing area  410 , for example, information required for daily maintenance work, information required for repairing the elevator, etc. Therefore, through the first bluetooth module  120  of the embodiments of the present invention integrated in the elevator calling control panel  12 , the information stored in the elevator system  100  can be conveniently acquired at the elevator landing area  410 , which is convenient for the daily maintenance or repairing of the elevator system  100 . 
     Referring to  FIG.  5   , a second bluetooth module  130  of the embodiments of the present invention is integrated on the target floor registration control panel  13  of the elevator  100 . The target floor registration control panel  13  is generally mounted in the elevator car  110 , and in one embodiment, the target floor registration control panel  13  is connected with the elevator controller  140  via a bus, and an RSL (Remote Serial Link) communication connection is established between the target floor registration control panel  13  and the elevator controller  140  of the elevator system  100  based on, for example but not limited to, an RSL protocol; correspondingly, for example an RSL processor  139  can be arranged in the target floor registration control panel  13 , and the RSL processor  139  can not only receive a target floor registration command from the second bluetooth module  130 , but also can receive a target floor registration command corresponding to pressing a floor button on the target floor registration control panel  13 , and the target floor registration command is processed according to the RSL protocol and then sent to the elevator controller  140 . The second bluetooth module  130  can particularly be realized by a bluetooth processor  131 , a memory  134  and a bluetooth antenna  133 , etc. The bluetooth antenna  133  can be used for receiving and broadcasting a bluetooth signal (for example, broadcasting a first bluetooth signal), and a filter  132  can be provided between the bluetooth antenna  133  and the bluetooth processor  131  to filter the bluetooth signal. A corresponding program can be arranged or mounted on the memory  134  to realize the function of the second bluetooth module  130  of the present invention, and the memory  124  can also set or store, for example, the UUID of the second bluetooth module  130  and/or the elevator car where the second bluetooth module  130  is located, etc. The bluetooth processor  131  of the second bluetooth module  130  can establish a corresponding communication connection with the RSL processor  139  of the target floor registration control panel  13  while working, for example a serial port connection established based on a UART. When the second bluetooth module  130  is working, the bluetooth processor  131  and the RSL processor  139  shake hands and constantly perform communication connection verification. As such, a target floor registration command obtained by the second bluetooth module  130  can be transmitted, in real time, to the RSL processor  139  of the target floor registration control panel  13  for processing, and then be sent, in real time, to the elevator controller  140 . 
       FIG.  6    shows a flowchart of a communication method for performing an elevator calling operation according to one embodiment of the present invention. The communication method of the embodiments of the present invention is described below in conjunction with  FIG.  1    to  FIG.  6   . Also exemplified is how a passenger carrying a personal mobile terminal  200  performs an elevator calling operation based on the communication method. 
     Firstly, the passenger carrying the personal mobile terminal  200  enters a certain elevator landing area  410 , and the personal mobile terminal  200  approaches a first bluetooth module  120  mounted in the elevator landing area  410 . In this process, the personal mobile terminal  200  is in a sleep mode, and the personal mobile terminal  200  can constantly scan bluetooth signals, i.e., step S 510 . Moreover, whether a wake-up signal in a first bluetooth signal broadcasted by the first bluetooth module  120  mounted in the elevator landing area  410  is scanned is judged, i.e., step S 520 , until a determination result is “yes”; and step S 530  is entered to wake up the personal mobile terminal  200  in the sleep mode. 
     It should be noted that the personal mobile terminal  200  is not limited to using the received wake-up signal to wake up the personal mobile terminal  200  in the sleep mode; in another embodiment, when the personal mobile terminal  200  scans a first bluetooth signal broadcasted by the first bluetooth module  120 , the signal strength of the first bluetooth signal that is scanned will be determined at the same time, and enables the personal mobile terminal  200  to automatically wake up from the sleep mode if the signal strength of the first bluetooth signal changes from relatively weak to equal to or greater than a first strength value; in yet another embodiment, when the personal mobile terminal  200  scans a first bluetooth signal broadcasted by the first bluetooth module  120 , the signal strength of the first bluetooth signal that is scanned will be determined at the same time, and the current distance from the personal mobile terminal  200  to the first bluetooth module  120  will be roughly determined based on the magnitude of the signal strength, so as to enable the personal mobile terminal  200  to automatically wake up from the sleep mode when the distance from the personal mobile terminal  200  to the first bluetooth module  120  is smaller than or equal to a certain predetermined value (e.g., a first distance threshold value). Further, in step S 540 , the personal mobile terminal  200  continues to scan so as to continue to receive the first bluetooth signal broadcasted by the first bluetooth module  120 . In this step, as the passenger has the need to take the elevator, the personal mobile terminal  200  may be constantly approaching the first bluetooth module  120 . 
     Further, in step S 550 , whether the current distance between the personal mobile terminal  200  and the first bluetooth module  120  is smaller than or equal to a first distance threshold value is judged according to the signal strength of the first bluetooth signal scanned. In this step, in one embodiment, the personal mobile terminal  200  can determine the current distance between the personal mobile terminal  200  and the first bluetooth module  120  according to the signal strength of the first bluetooth signal scanned, so as to judge whether the distance is smaller than or equal to the first distance threshold value according to the pre-entered or pre-determined first distance threshold value, wherein the first distance threshold value can specifically be selected and set according to the signal strength of the first bluetooth signal broadcasted by the first bluetooth module  120 , the specific architectural structure of the elevator landing area, etc., for example, in the range of 3 to 20 meters, thus reflecting, as accurately as possible, that a passenger in the range smaller than or equal to the first distance threshold value indeed has the intention to take the elevator (i.e., having an elevator calling need). 
     It should be noted that in another embodiment, whether to establish a second bluetooth connection can be judged directly based on the signal strength of the second bluetooth signal scanned, and specifically, the personal mobile terminal  200  can judge, according to the signal strength of the second bluetooth signal scanned, whether the signal strength changes from relatively weak (e.g., 0) to equal to or greater than a second strength value, and the second strength value can correspondingly be, for example, a signal strength value of the corresponding second bluetooth signal in the case of the second distance threshold value. 
     If a determination result is “no”, step S 540  is returned to, to continue scanning; if a determination result “yes”, step S 560  is entered, to automatically establish a first bluetooth connection between the first bluetooth module  120  and the personal mobile terminal  200 ; at this moment, the first bluetooth module  120  can send a data signal to the personal mobile terminal  200 , for example, a data signal that reflects the UUID of the first bluetooth module  120 , a data signal that reflects the floor location information about where the first bluetooth module is located, etc., so that the personal mobile terminal  200  can learn to which first bluetooth module  120  it is connected and automatically acquire the floor location information about where it is currently located. 
     Further, in step S 570 , an elevator calling request command regarding an elevator calling direction is sent to the first bluetooth module  120 . In step S 570 , the first bluetooth module  120  simultaneously receives the elevator calling request command, and after receiving the elevator calling request command, as shown in  FIG.  4   , the RSL processor  129  in the elevator calling control panel  12  can process the elevator calling request command and then transmit same to the elevator controller  140  via a bus, and of course can transmit the floor location information, etc. to the elevator controller  140 . 
     Further, in step S 580 , after the elevator calling request command is successfully accepted, a confirmation message is returned to the personal mobile terminal  200 . If the elevator calling request command is successfully accepted by the elevator controller  140 , i.e., the elevator controller  140  will control the running of one or more elevator cars  110  in the elevator system  10  based on the elevator calling request command, then the elevator controller  140  will return a confirmation message to the RSL processor  129 , and the confirmation message is further returned to the first bluetooth module  120  and is further returned to the personal mobile terminal  200 . 
     Further, in step S 590 , after receiving the confirmation message, the personal mobile terminal  200  actively disconnects the first bluetooth connection, to make preparation for the establishment of a connection between the personal mobile terminal  200  and the second bluetooth module  130 , and also make preparation for the establishment of a first bluetooth connection between the first bluetooth module  120  and other personal mobile terminals  200 . 
     Further, in step S 610 , the personal mobile terminal  200  continues to scan, and the signal strength of the second bluetooth signal broadcasted by the second bluetooth module  130  is weaker relative to the first bluetooth signal, and if the elevator car  110  corresponding to the second bluetooth module  130  arrives at the elevator landing area  410  and the personal mobile terminal  200  is close enough relative to the second bluetooth module  130 , then the personal mobile terminal  200  will scan the second bluetooth signal, for example, the passenger carrying the personal mobile terminal  200  is walking into the elevator car  110  or has already walked into the elevator car  110 , and the second bluetooth signal can be scanned. 
     Further, in step S 620 , whether the current distance between the personal mobile terminal  200  and the second bluetooth module  130  is smaller than or equal to a second distance threshold value is judged according to the signal strength of the second bluetooth signal scanned. In this step, the personal mobile terminal  200  can determine the current distance between the personal mobile terminal  200  and the second bluetooth module  130  according to the signal strength of the second bluetooth signal scanned, so as to be able to judge whether the distance is smaller than or equal to a second distance threshold value according to the pre-entered or pre-determined second distance threshold value, wherein the second distance threshold value can specifically be selected and set according to the signal strength of the second bluetooth signal broadcasted by the second bluetooth module  130 , the size of the elevator car  110 , etc. Optionally, the second distance threshold value is smaller than the first distance threshold value, and the second distance threshold value is set in the range of 0.7 to 1 meter, so as to avoid firstly establishing a second bluetooth connection and then establishing a first bluetooth connection when a passenger enters the elevator landing area  410 , and it can also be avoided as far as possible that the personal mobile terminal  200  of a passenger who is outside the elevator car  110  and is definitely not intending to take the elevator car  110  establishes a second bluetooth connection with the second bluetooth module  130 . By setting the size of the second distance threshold value, it is possible to reflect, as accurately as possible, whether a passenger in the range smaller than or equal to the second distance threshold value is walking into the elevator car  110  or has already walked into the elevator car  110 . 
     It should be noted that in another embodiment, whether to establish a second bluetooth connection can be judged directly based on the signal strength of the second bluetooth signal scanned, and specifically, the personal mobile terminal  200  can judge, according to the signal strength of the second bluetooth signal scanned, whether the signal strength changes from relatively weak (e.g., 0) to equal to or greater than a second strength value, and the second strength value can correspondingly be, for example, a signal strength value of the corresponding second bluetooth signal in the case of the second distance threshold value. 
     If a determination result is “no”, step S 610  is returned to, to continue scanning; if a determination result is “yes”, step S 630  is entered, to automatically establish a second bluetooth connection between the second bluetooth module  130  and the personal mobile terminal  200 ; at this moment, the second bluetooth module  130  can send a data signal to the personal mobile terminal  200 , for example, a data signal that reflects the UUID of the second bluetooth module  130 , a data signal that reflects the floor location information about where the second bluetooth module  130  is located, so that the personal mobile terminal  200  can learn to which second bluetooth module  130  it is connected and in which elevator car  110  it is located. 
     Further, in step S 640 , a target floor registration command is sent to the second bluetooth module  130 . In step S 640 , the second bluetooth module  130  simultaneously receives the target floor registration command, and after receiving the target floor registration command, as shown in  FIG.  5   , the RSL processor  139  in the target floor registration control panel  13  can process the target floor registration command and then transmit same to the elevator controller  140  via a bus. 
     Further, in step S 650 , after the target floor registration command is successfully accepted by the elevator system  100 , a confirmation message is returned to the personal mobile terminal  200 . If the target floor registration command is successfully accepted by the elevator controller  140 , i.e., the elevator controller  140  will control the operation of the elevator car  110  based on the target floor registration command, then the elevator controller  140  will return a confirmation message to the RSL processor  139 , and the confirmation message is further returned to the second bluetooth module  130  and further returned to the personal mobile terminal  200 . 
     Further, in step S 660 , after receiving the confirmation message, the personal mobile terminal  200  actively disconnects the second bluetooth connection, to make preparation for the establishment of a second bluetooth connection between the second bluetooth module  130  and other personal mobile terminals  200 . At this moment, the elevator calling operation of the passenger has already been completed, and the passenger will be carried to the floor corresponding to the target floor registration command. 
     Further, in step S 670 , the personal mobile terminal  200  automatically enters a sleep mode. 
     So far, the process of a communication method corresponding to a personal mobile terminal  200  and an elevator system  100  is basically completed. However, it is to be understood that the first bluetooth module  120  and the second bluetooth module  130  of the elevator system  100  can successively perform the above communication process with other personal mobile terminals  200 ; for example, after a plurality of passengers carrying personal mobile terminals  200  enter the elevator landing area  130 , the above steps S 510  to S 590  can be realized successively so that each passenger can complete the elevator calling operation in the elevator landing area; and after the plurality of passengers carrying personal mobile terminals  200  enter the elevator car  110 , the above steps S 610  to S 670  can be realized successively so that each passenger can complete the elevator calling operation in the elevator car. Therefore, in this embodiment, the first bluetooth module  120  establishes a first bluetooth connection with only one personal mobile terminal  200  at a certain moment, and likewise, the second bluetooth module  130  establishes a second bluetooth connection with only one personal mobile terminal  200  at a certain moment; and moreover, it is to be understood that the time length for performing the above steps S 560  to S 590  each time and the time length for performing the above steps S 630  to S 660  each time can be controlled, for example, in the order of magnitude of milliseconds, so as to satisfy the need that more passengers complete elevator calling operations basically at the same time in a shorter time period. 
       FIG.  7    is a structural schematic diagram of a module of a personal mobile terminal according to one embodiment of the present invention. As shown in  FIG.  7   , the personal mobile terminal  200  is applied in the communication system  10  as shown in  FIG.  1   , and is configured to be able to receive a first bluetooth signal broadcasted by the first bluetooth module  120  mounted in the elevator landing area  410  of the elevator system  100  and be able to receive a second bluetooth signal broadcasted by the second bluetooth module  130  mounted in the elevator car  110  of the elevator system  100 . For example, the personal mobile terminal  200  is configured with a bluetooth communication module  210  to receive the first bluetooth signal or the second bluetooth signal. 
     As shown in  FIG.  7   , the personal mobile terminal  200  is provided with a bluetooth connection management module  220  for successively automatically establishing the first bluetooth connection and the second bluetooth connection respectively based on the first bluetooth signal and the second bluetooth signal. The specific process and principle for automatically establishing the first bluetooth connection are exemplified in the above description corresponding to steps S 510  to S 560  in  FIG.  6   . In one embodiment, the bluetooth connection management module  220  is configured to automatically establish a bluetooth connection with only one of the first bluetooth module  120  and the second bluetooth module  130  at a certain moment; as an example, if the bluetooth connection management module  220  can scan the first bluetooth signal and the second bluetooth signal at the same time, the bluetooth connection management module  220  selects only one of them to establish a corresponding bluetooth connection, wherein the second bluetooth connection can only be established after the first bluetooth connection which is earlier established is disconnected. 
     In one embodiment, the bluetooth connection management module  220  is also configured to automatically establish the first bluetooth connection when signal strength of the first bluetooth signal it receives changes from relatively weak to equal to or greater than a first strength value, and/or automatically establish the second bluetooth connection when signal strength of the second bluetooth signal it receives changes from relatively weak to equal to or greater than a second strength value. Here, the first strength value can be determined in advance according to factors like the signal strength of the first bluetooth signal broadcast, the structure of the elevator landing area  410 , etc., and the second strength value can be determined in advance according to factors like the signal strength of the second bluetooth signal broadcast. 
     In one embodiment, the bluetooth connection management module  220  is provided with a recognition submodule  221 , wherein the recognition submodule  221  is used for recognizing the first bluetooth signal and determining a floor location where the first bluetooth module is located; in one example, the first bluetooth signal broadcasted by the first bluetooth module  120  includes the UUID thereof, and by recognizing the UUID, the recognition submodule  221  can recognize which specific bluetooth module broadcasts the first bluetooth signal, and can even recognize the floor location information about where the first bluetooth module is located; and in another example, the first bluetooth signal broadcasted by the first bluetooth module  120  also includes a data signal containing the floor location information about where the first bluetooth module is located, and by recognizing the data signal, the floor location information about where the first bluetooth module is located can be determined. 
     In one embodiment, the bluetooth connection management module  220  is also provided with a distance determination submodule  222 . When a personal mobile terminal  200  receives a first bluetooth signal, the distance determination submodule  222  can roughly determine the distance from the personal mobile terminal  200  to the first bluetooth module  120  according to the signal strength of the first bluetooth signal; likewise, when a personal mobile terminal  200  receives a second bluetooth signal, the distance determination submodule  222  can roughly determine the distance from the personal mobile terminal  200  to the second bluetooth module  120  according to the signal strength of the second bluetooth signal. The distance determination submodule  222  can automatically establish the first bluetooth connection when the distance from the personal mobile terminal  200  to the first bluetooth module  120  is smaller than or equal to a first distance threshold value. 
     The bluetooth connection management module  220  can manage bluetooth connections based on the result obtained by the recognition submodule  221  and/or the distance determination submodule  222 , for example, judging, according to the determined distance, whether the distance between the current personal mobile terminal  200  and the first bluetooth module  120  or the second bluetooth module  130  is smaller than or equal to a corresponding first distance threshold value or second distance threshold value, so as to determine whether to establish a first bluetooth connection or a second bluetooth connection. The bluetooth connection management module  220  can specifically set the size of the first distance threshold value and the size of the second distance threshold value, and the first distance threshold value is generally obviously greater than the second distance threshold value, for example, the first distance threshold value is set in the range of 3 to 20 meters, and the second distance threshold value is set in the range of 0.7 to 1 meter. As such, the bluetooth connection management module  220  can avoid simultaneously establishing the first bluetooth connection and the second bluetooth connection. Moreover, the bluetooth connection management module  220  can also be used for managing the automatic disconnection of the first bluetooth connection or the second bluetooth connection, for example, automatically disconnecting the first bluetooth connection after the personal mobile terminal  200  has already sent out an elevator calling request command, and automatically disconnecting the second bluetooth connection after the personal mobile terminal  200  has already sent out a target floor registration command. 
     Again, as shown in  FIG.  7   , the personal mobile terminal  200  is also provided with a first command sending module  230  for automatically sending an elevator calling request command regarding an elevator calling direction to a corresponding first bluetooth module  120  when establishing the first bluetooth connection; as an example, if the recognition submodule  221  acquires the floor location information about where the first bluetooth module  120  is located, e.g., the lobby floor, an “upward” elevator calling request command can be sent according to a beforehand elevator calling request command setting, so as to replace the action of manually pressing the “ upward” elevator calling button. 
     Again, as shown in  FIG.  7   , the personal mobile terminal  200  is also provided with a second command sending module  240  for automatically sending a target floor registration command to a corresponding second bluetooth module  130  when establishing the second bluetooth connection; as an example, if the recognition submodule  221  acquires the floor location information about where the first bluetooth module  120  is located, e.g., the lobby floor, a target floor that the passenger might most possibly want to go to can be determined according to a beforehand target floor registration setting, and a corresponding target floor registration command can be sent, so as to replace the action of manually pressing the floor button in the elevator car. 
     The commands sent by the first command sending module  230  and the second command sending module  240  can be sent out in the form of bluetooth signals through the bluetooth communication module  210 , for example, sent to the first bluetooth module  120  through a first bluetooth connection channel established, sent to the second bluetooth module  130  through a second bluetooth connection channel established. 
     Again, as shown in  FIG.  7   , in one embodiment, the personal mobile terminal  200  is also provided with a command generation module  250  which generates an elevator calling request command and/or a target floor registration command based on a personalized configuration, so as to be able to generate an accurate elevator calling request command or a target floor registration command according to the passenger&#39;s condition. As an example, a passenger corresponding to the personal mobile terminal  200  is carrying out daily work or life on the Nth floor of an office building or a residential building, and the passenger can enter the Nth floor in the command generation module  250  and go to the Nth floor by completing the hand-free automatic elevator calling operation through the personal mobile terminal  200  by default, i.e., entering a personalized configuration; if the passenger is currently located at the elevator landing area  410  of the (N−x)th floor (which can be acquired through the recognition submodule  221 ), then the command generation module  250  will automatically generate an “upward” elevator calling request command and provide same to the first command sending module  230  for sending, and at the same time can also generate a target floor registration command corresponding to the Nth floor and provide same to the second command sending module  240  for sending; and if the passenger is currently located at the elevator landing area  410  of the (N+y)th floor (which can be acquired through the recognition submodule  221 ), then the command generation module  250  will automatically generate a “downward” elevator calling request command and provide same to the first command sending module  230  for sending, and at the same time can also generate a target floor registration command corresponding to the Nth floor and provide same to the second command sending module  240  for sending. 
     If the passenger enters a plurality of floors in the command generation module  250  and goes to any one of the plurality of floors by completing the hand-free automatic elevator calling operation through the personal mobile terminal  200  by default, then a personalized configuration can be entered according to the set time period, the condition of the floor where he/she is currently located, etc., to generate an accurate elevator calling request command and/or target floor registration command. 
     It should be noted that the personal mobile terminal  200  of the above embodiments of the present invention can be realized by computer program instructions, for example, by a dedicated APP, and these computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer or other programmable data processing devices, to constitute a personal mobile terminal  200  of the embodiments of the present invention. Moreover, the processor of a computer or other programmable data processing devices can execute these instructions to create a unit or part for implementing functions/operations specified in these flowcharts and/or blocks and/or one or more flow block diagrams. 
     Likewise, the first bluetooth module  120  and the second bluetooth module  130  of the elevator system  100  of the above embodiments of the present invention can be realized by computer program instructions, for example, by a dedicated program, and these computer program instructions can be provided to a processor to constitute a control module  300  of the embodiments of the present invention. Moreover, these instructions executed by the processor of a computer or other programmable data processing devices can be used to create a unit or part for implementing functions/operations specified in these flowcharts and/or blocks and/or one or more flow block diagrams. 
     Moreover, these computer program instructions can be stored in a computer readable memory, these instructions can instruct the computer or other programmable processors to realize functions in a specific way, so that these instructions stored in the computer readable memory construct a manufacturing product that contains an instruction part for implementing the functions/operations specified in one or more blocks of the flowcharts and/or block diagrams. 
     It should also be noted that in some alternative implementation manners, the functions/operations shown in the blocks may not happen in the sequence shown in the flowchart. For example, two blocks that are successively shown can be executed substantially at the same time in fact, or these blocks sometimes can be executed in a reversed order, depending on the involved function/operation in particular. 
     It should be noted that the elements (including flowcharts and block diagrams in the accompanying drawings) disclosed and depicted in this specification refer to the logic boundary between elements. However, according to the software or hardware engineering practice, the depicted elements and the functions thereof can be executed on a machine through a computer executable medium, the computer executable medium has a processor that can execute program instructions stored thereon, and the program instructions serve as a monolithic software structure, as an independent software module or as a module using external programs, code, services, etc., or any combination of them, and all these execution solutions may fall in the scope of the present disclosure. 
     Although different non-restrictive embodiments have specifically described components, the embodiments of the present invention are not limited to these specific combinations. Some of the components or features from any non-restrictive embodiments can be used in combination with the features or components of any other non-restrictive embodiments. 
     Although a specific step sequence is shown, disclosed and claimed, it should be understood that the steps can be implemented, separated or combined in any order, and will still benefit from the present disclosure, unless otherwise specified. 
     The previous description is exemplary but is not defined to be limited thereto. This specification discloses various non-restrictive embodiments. However, a person of ordinary skill in the art will be aware that various modifications and changes will fall in the scope of the accompanying claims according to the above-mentioned teachings. Therefore, it is to be understood that the disclosed content, except for the specific disclosure, can be implemented in the scope of the accompanying claims. For this reason, it is necessary to study the accompanying claims to determine the actual scope and content.