CN115174531A - Method for realizing video call and remote maintenance of broadband fixed station based on LTE - Google Patents
Method for realizing video call and remote maintenance of broadband fixed station based on LTE Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W4/12—Messaging; Mailboxes; Announcements
- H04W4/14—Short messaging services, e.g. short message services [SMS] or unstructured supplementary service data [USSD]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/16—Communication-related supplementary services, e.g. call-transfer or call-hold
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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Abstract
The invention discloses a method for realizing video call and remote maintenance of a broadband fixed station based on LTE (Long term evolution), which is realized by utilizing the broadband fixed station as an operating platform and through broadband cluster app software preinstalled in the broadband fixed station based on an LTE broadband core network, consists of a control unit, an interface unit, a display unit, a key unit, a loudspeaker, a handle, a camera, an LTE channel machine and a power supply unit, is used for supporting the functions of voice call, video call, short data communication, local maintenance and remote maintenance, and meets the industrial function requirements.
Description
Technical Field
The invention relates to the field of digital trunking wireless communication equipment, in particular to a method for realizing video call and remote maintenance of a broadband fixed station based on LTE.
Background
The fixed station in the current market is mainly developed based on a Tetra narrowband core network, and only supports the functions of voice communication and short data communication due to the limitation of narrowband resources, so that the function is single, and the service data transmission rate is low. And because the fixed station is installed in the vehicle control room of the station, and each line has many stations, when the fixed station is in fault or the fixed station needs to be upgraded, maintenance personnel need to copy logs or upgrade to each station, which causes great difficulty to field maintenance. With the rapid development of the LTE system wireless private network solution, the original fixed station based on the Tetra narrowband core network cannot meet the increasingly rich functional requirements of the existing market. Because the application of the wireless cluster communication of the broadband core network on the subway is just started, the existing broadband fixed station in the market is only added with the video call function on the basis of meeting the requirements of narrowband services, and the problem of difficult field maintenance is still not solved.
Disclosure of Invention
In view of the problems of single function, difficult maintenance and difficult maintenance of the existing broadband fixed station caused by the resource limitation of a Tetra narrowband core network in the prior art, the invention develops a method for realizing the video call and remote maintenance of the broadband fixed station based on the LTE.
The technical scheme adopted by the invention is as follows: a method for realizing video call and remote maintenance of a broadband fixed station based on LTE (Long term evolution), which is realized based on an LTE broadband core network by using the broadband fixed station as an operation platform, wherein broadband cluster app software is preinstalled in the broadband fixed station, and comprises the following steps: registering and accessing the network: the broadband fixed station is started, the control unit initiates a network access request to the LTE broadband core network through the LTE channel machine, and after the network access is successful, the LTE channel machine analyzes the information of successful network access through the control unit and displays the registration state through the display unit; the voice call function: after the registration and the network access are finished, the display unit is operated to select the number to initiate the call, the display unit processes the voice call initiating information through the control unit, then the voice call initiating information initiates a voice call request to an LTE broadband core network through the LTE channel machine, and after the call is successfully established, the voice call is finished through the acquisition, sending, receiving and playing of audio data; the video call function: after the registration and the network access are finished, operating the display unit to select the number to initiate the video call, processing the video call initiating information by the control unit through the video call initiating information by the display unit, initiating a video call request to an LTE broadband core network through the LTE channel machine, and finishing the video call through the acquisition, sending, receiving and playing of audio data and the acquisition, sending, receiving and playing of video data after the video call is established; short data communication function: after the registration and the network access are finished, the display unit is operated to select the number to send the short message, and after the display unit processes the short data information through the control unit, the short data information is sent to the LTE broadband core network through the LTE channel machine; local maintenance: after the registration and the network access are completed, when a local log needs to be copied, a USB (universal serial bus) or OTG (on-the-go) interface of an interface unit is inserted into a USB or OTG (on-the-go) interface, a USB insertion signal is processed by the control unit and then is sent to the display unit, the display unit displays a USB insertion prompt, the display unit is operated to copy the log, and the local log of the control unit is copied to the USB; when a local program needs to be upgraded, a USB (Universal Serial bus) or OTG (on-the-go) interface of an interface unit is inserted into a USB or OTG (optical transport gateway) interface, a USB insertion signal is processed by the control unit and then is sent to the display unit, the display unit displays a USB insertion prompt, the display unit is operated to upgrade the program, and the local program of the control unit is upgraded; remote maintenance: after the registration and the network access are finished, when the log needs to be copied remotely, network management software on a control center computer is operated, a remote maintenance request is sent to the appointed broadband fixed station, the request carries pull log information, the LTE channel machine sends the received remote maintenance request to a control unit through an interface unit, and the control unit uploads a local log to the control center network management computer after processing the remote maintenance request; when the program needs to be upgraded remotely, operating network management software on a control center computer, sending a remote maintenance request to a specified broadband fixed station, wherein the request carries upgrading information, sending the received remote maintenance request to a control unit through an interface unit by the LTE channel machine, processing the remote maintenance request by the control unit, downloading the upgraded program from the central network management computer, and finishing upgrading; the broadband fixed station completes a voice call function, a video call function, a short data communication function, local maintenance and remote maintenance through broadband cluster app software.
The method for analyzing the information of successful registration by the control unit in the registered network access comprises the steps of calling the registered network access interface to access the network, starting to execute monitoring signal change and monitoring network access state after the network access interface is called, acquiring a signal value after the monitoring signal state is changed, updating an interface display signal, judging whether the network access is successful or not after the monitoring network access state is changed, updating the registration state of the interface if the network access is successful, and executing the registered network access interface again after 5 seconds if the network access is failed.
The processing process of the control unit in the voice call on the information of the initiated voice call comprises the steps of monitoring the call state, judging the current call information according to call parameters after the call state is changed, updating an interface on an original application program component when the call state is a voice single call or a voice group call, then starting recording, judging the speaking right and the call state according to the call transient change, and ending the recording and storing the call information into a database when the call is ended.
The processing process of collecting, sending, receiving and playing the audio data in the voice call is that when the audio data is collected and sent, the control unit collects local audio data through a handle of the interface unit, encodes the audio data in the PCM coding format into audio data in the AMR format, sends the audio data to the LTE channel machine through the channel machine interface, and sends the audio data to the LTE broadband core network through the antenna by the LTE channel machine to finish the collection and sending of the audio data; when the audio data is received and played, the LTE channel machine sends the received audio data of the speech of the other party to the interface unit through the channel machine interface, the interface unit sends the audio data to the control unit, the control unit decodes the audio data from the AMR coding format into the PCM coding format and then sends the audio data to the loudspeaker, and the loudspeaker plays the audio data, so that the receiving and playing of the audio data are completed.
The processing process of the control unit in the video call for initiating the video call comprises the steps of monitoring a call state, judging current call information according to call parameters after the call state is changed, popping up a new application program assembly to display a video when the call state is the video call, starting recording, judging the speaking right and the call state according to call transient change, and ending the recording and storing the call information into a database when the call is ended.
The processing process of collecting, sending, receiving and playing the video data in the video call is that when the video data is collected and sent, the control unit collects local video data through a camera of the interface unit, encodes the video data in the YUV encoding format into data in the H264 format, sends the data to the LTE channel machine through the channel machine interface, and sends the data to the LTE broadband core network through the antenna by the LTE channel machine to finish the collection and sending of the video data; when the video data is received and played, the LTE channel machine sends the received video data of the opposite side to the interface unit through the channel machine interface, the interface unit sends the video data to the control unit, the control unit decodes the video data from the H246 coding format into the YUV coding format and then sends the YUV coding format to the display unit, and the display unit displays the video, so that the receiving and displaying of the video data are completed.
The short data communication control unit processes the short data information by monitoring the short message service, storing the content of the short message into a buffer area after receiving the short message, carrying out protocol analysis in the buffer area, updating an interface after the analysis is finished, prompting a user to receive a new message, and storing the content of the short message into a database.
The processing process of the control unit in the local maintenance on the USB flash disk insertion signal is that after the USB flash disk is inserted into equipment, a USB flash disk packing path is obtained, when upgrading is needed, an APK file is searched, whether the program name of the APK file is the same as the current program name or not is judged, if not, an interface prompt cannot be installed, if yes, whether the version of the APK file is higher than the current version or not is continuously judged, if not, the interface prompt cannot be installed, if yes, the interface prompt clicks to install, and after clicking to install, a user can finish upgrading operation; when the log needs to be copied, whether the residual space of the target folder is enough is checked, if not, the interface prompts that the log cannot be transmitted, and if so, the log starts to be transmitted, so that the log is copied.
The process of the control unit in remote maintenance to the remote maintenance request is that after creating an FTP client, all file paths needing to be transmitted are recursively acquired, network management information is analyzed, if the network management information is APK upgrade, an APK file is searched, whether the program name of the APK file is the same as the current program name is judged, if not, a failure information is sent to the network management, if yes, whether the version of the APK file is higher than the current version is continuously judged, if not, the failure information is sent to the network management, if yes, the APK is started to be downloaded, and after the APK is downloaded, APK installation is automatically executed, and remote upgrade can be completed; if the network management message is log copy, the local log file is compressed, then the local log file is uploaded to a designated path, and after the uploading is finished, a success message is sent to the network management, so that the remote log uploading can be finished.
The broadband fixed station consists of a control unit, an interface unit, a display unit, a key unit, a loudspeaker, a handle, a camera, an LTE channel machine and a power supply unit and is used for supporting voice call, video call, short data communication, local maintenance and remote maintenance functions; the broadband fixed station is connected with the interface unit and used for realizing interface expansion of the control unit, is connected with the display unit and used for realizing interface display and touch operation, is connected with the key unit and used for realizing key control, and is connected with the loudspeaker and used for realizing playing of prompt tones and conversation sounds; the interface unit is connected with the handle and used for realizing the functions of applying and releasing the speaking right during voice call, connected with the camera and used for realizing the acquisition of local video during video service, connected with the LTE channel machine and used for realizing the function of registering and accessing the network of a broadband fixed station, and connected with the power supply unit and used for supplying power to the broadband fixed station; the debugging interface of the interface unit is used for software development and debugging of an external computer on the broadband fixed station, the broadcasting interface is connected with a broadcasting manufacturer and used for realizing a station broadcasting function, and the USB interface and the OTG interface are used for copying the U disk file and locally upgrading the broadband fixed station.
The beneficial effects produced by the invention are as follows: the broadband fixed station is realized based on an LTE (Long term evolution) broadband core network, besides the functions of voice call, short data communication and local maintenance based on a Tetra narrowband core network, the broadband fixed station also supports the video call function of the broadband core network, and meanwhile, the advantage of wide bandwidth of the broadband core network is fully utilized, so that the remote maintenance function is realized, the problems of single function and difficult field maintenance of the existing fixed station in the market are solved, and the industrial function requirements are met.
Drawings
FIG. 1 is a block diagram of the circuit connections of the present invention;
FIG. 2 is a general block diagram of the software of the present invention;
FIG. 3 is a flowchart of the registration network entry process of the present invention;
FIG. 4 is a flow chart of the voice service of the present invention;
FIG. 5 is a video service flow diagram of the present invention;
FIG. 6 is a short message service flow diagram of the present invention;
FIG. 7 is a flow chart of local maintenance of the present invention;
FIG. 8 is a remote maintenance flow diagram of the present invention;
fig. 9 is a system connection block diagram of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings: referring to fig. 1, a broadband fixed station is composed of a control unit, an interface unit, a display unit, a key unit, a speaker, a handle, a camera, an LTE channel unit, and a power supply unit. The control unit is used as a core processing unit of the system, is connected with the display unit through a 60-core connector, is connected with the interface unit through a 50-core connector, is connected with the key unit through a serial port, and is connected with the loudspeaker through an analog audio interface. The control unit adopts the form of a core board and a bottom board, the CPU of the core board adopts an IMX6Q processor of Freescale company, the processor is a 4-core, a Cortex-A9 architecture and a dominant frequency of 1.2GHz. A1GB DDR3 SDRAM and a 2GB Nand Flash memory, a core board is industrial grade, on-board 1 path of 1000M network interface, 4 paths of TTL serial ports, MIC and SPK audio, 1 path of USB-HOST, 1 path of OTG, 4 paths of UART serial ports, an LVDS interface, an HDMI interface and a GPIO, and a bottom board provides power supply and expansion functions for the core board. The control unit is based on an Android operating system, and can realize the drive control of GPIO, serial ports, a liquid crystal display, PWM, audio coding and decoding, internet access, a camera, a SATA hard disk, key interruption, USB and OTG through the customized development of the Android system and the connection adaptation of a drive and application layer. The control unit Android system dials a dial switch of a starting mode when programming for the first time, an OTG interface is connected to a PC end through a double-head USB connecting line and powers on equipment, the system automatically conducts a recovery mode, software of the programming system is operated at the PC end, corresponding operation is selected according to prompts, the dial switch is dialed to a normal starting mode after the completion, at the moment, the broadband fixed station is powered on again, and the system is started normally.
The interface unit is used for leading out the interface on the control unit and converting the interface into an external interface and finishing the power supply control of the system, so the interface unit selects a singlechip LPC1765 chip to finish serial output and control. The interface unit comprises a handle interface, a camera interface, a debugging interface, a broadcasting interface, a USB interface, an OTG interface, a power interface and a channel machine interface; the handle interface is connected with the handle, the camera interface is connected with the camera, the channel machine interface is connected with the LTE channel machine, and the power interface is connected with the power supply unit. The debugging interface, the broadcasting interface, the USB interface and the OTG interface of the interface unit are external interfaces, and the key unit comprises an emergency key and a calling key and is used for initiating an emergency call and calling the dispatching.
The mode that the board was torn open in LTE channel machine adoption for realize that the design of broadband fixed station is more frivolous, for the interference problem that prevents probably appearing between the unit, the channel machine unit of tearing open reserves shielding chamber position in the broadband fixed station, does individual shielding chamber for the channel machine board and handles, and the device that easily generates heat pastes the heat pad on the unit and conducts and dispel the heat on the casing.
The display unit consists of a 7-inch liquid crystal screen and a touch screen; the power supply unit supplies power and uses AC220V input, and a power adapter of 12V/5A is output to supply power to the broadband fixed station; the loudspeaker uses 8 ohm, 3W loudspeaker, adopts built-in mode, the loudspeaker output adopts power amplifier chip MAX98400B, the power amplifier is D type, gain is adjustable, the maximum output power of double-channel audio frequency can reach 10W.
Referring to FIG. 2, the general software block diagram of the invention is composed of a UI interface and a background program, wherein the background program comprises a USB flash disk module, a RTC module, a watchdog module, an audio/video coding/decoding module, a configuration file module, a complete machine parameter module, a log module, a database module and a recording management module, wherein the UI interface is used as a level 1, a level 2 and a level 3 interface in the process of displaying business processing and receives touch operation input; the USB flash disk module of the background program is used for realizing the upgrading application program of the USB flash disk, and copying logs and records; the RTC module is used for reading and writing time data; the watchdog module is used for controlling a watchdog timer to realize timed watchdog feeding; the audio and video coding and decoding module is used for coding and decoding the audio and video calls, wherein the audio parameters are AMR, a coding rate of 12.2kbps, a sampling interval of 20ms, a byte alignment mode and a bandwidth saving mode, and the video parameters are H.264, 25 frames/second, CIF (355 × 288) and 720p (1280 × 720); the configuration file module uses an ini type configuration file for configuring system contacts, IP addresses and port numbers; the whole machine parameter module stores whole machine setting parameters including volume, brightness and local number by using shared prediction; the log module stores system operation logs, fault logs and user logs by using a TXT file; the database module adopts a sqlite database for storing an address book, a call record and a call record; the recording management module is used for storing recording data, replaying the recording and exporting the recording.
Referring to fig. 3, a registered access process starts, after a program starts, a registered access interface is called to access the network, after the access interface is called, monitoring signal change and monitoring access state are respectively started, after the monitoring signal state changes, a signal value is obtained and an interface display signal is updated, after the monitoring access state changes, whether the access is successful is judged, if the access is failed, the registered access interface is executed again after 5 seconds of delay, if the access is successful, the registered state of the interface is updated, and the process is ended.
Referring to the voice service process of fig. 4, a monitoring call state is started, after the call state is changed, the current call information is judged according to the call parameters, when the call state is changed, an interface is updated on an original application program component, then recording is started, the speaking right and the conversation state are judged according to the call transient change, when the call is ended, the recording is ended, the call information is stored in a database, and the process is ended.
Referring to the video service flow of fig. 5, a monitoring call state is started, after the call state is changed, current call information is judged according to call parameters, when the call state is a video call, a new application program component is popped up to display a video, then video recording is started, the speaking right and the conversation state are judged according to call transient change, when the call is ended, the video recording is ended, the call information is stored in a database, and the flow is ended.
Referring to the short message service flow of fig. 6, starting to enter into the monitoring short message service, after receiving the short message, storing the content of the short message into a cache region, performing protocol analysis in the cache region, updating to an interface after the analysis is completed, prompting a user to receive a new message, and simultaneously storing the content of the short message into a database, and ending the flow.
Referring to a local maintenance flow of fig. 7, starting, after a usb disk is inserted into a device, acquiring a path of a usb disk, when upgrading is required, searching an APK file, determining whether a program name of the APK file is the same as a current program name, if not, prompting an interface to be installed, if so, continuing to determine whether an version of the APK file is higher than the current version, if not, prompting the interface to be installed, if so, prompting the interface to be installed, and if so, completing upgrading operation after the user clicks installation; when the log needs to be copied, whether the residual space of the target folder is enough is checked, if not, the interface prompts that the transmission cannot be carried out, if so, the transmission is started, so that the copying of the log is finished, and the process is finished.
Referring to fig. 8, a remote maintenance flow starts, after an FTP client is created, all file paths to be transmitted are recursively acquired, a network management message is analyzed, if the network management message is an APK upgrade, an APK file is searched, whether the program name of the APK file is the same as the current program name is judged, if not, a failure message is sent to the network management, if yes, whether the version of the APK file is higher than the current version is continuously judged, if not, the failure message is sent to the network management, if yes, the APK is started to be downloaded, and after the APK is downloaded, the APK installation is automatically executed, and the remote upgrade can be completed; if the network management message is log copy, the local log file is compressed, then the local log file is uploaded to a designated path, and after the uploading is finished, a success message is sent to the network management, so that the remote log uploading can be finished, and the process is finished.
Embodiment 1, referring to fig. 9, a method for implementing video call and remote maintenance of a broadband fixed station based on LTE is provided, where broadband cluster app software is preinstalled in the broadband fixed station; the power supply unit is accessed through an AC 220V-DC 12V adapter, the LTE broadband core network is accessed through an antenna in a wireless mode, the LTE broadband core network is connected with an external computer through a debugging interface, a broadcasting manufacturer is connected through a broadcasting interface, and the USB flash disk is connected through a USB interface or an OTG interface; the hand-held terminal is accessed to an LTE broadband core network through wireless, and a network management of the control center is accessed to the LTE broadband core network through wired; after the broadband fixed station is connected with the power supply, the startup key on the key unit is pressed down, so that the startup of the broadband fixed station can be realized.
When the broadband fixed station needs to be debugged, the external computer can debug the broadband fixed station in real time, and the debugging content comprises real-time downloading of codes, real-time running states of the codes, real-time display of logs and the like. When the station broadcasting needs to be carried out on the station where the broadband fixed station is located, a worker can select a broadcasting group by operating an operation interface of the broadband fixed station, a PTT (push-to-talk) button on a handle is pressed, the calling of the broadcasting group is initiated, the broadband fixed station sends collected audio data of a microphone on the handle to a broadcasting manufacturer through a broadcasting interface, and the broadcasting manufacturer broadcasts the audio data in a station hall after receiving the audio data. After the broadband fixed station is started, registration is initiated to an LTE broadband core network in a wireless mode through an antenna, and after the registration is successful, the interface of the display unit displays the signal intensity and the registration state. When voice communication with other handheld terminals in an LTE broadband core network environment is needed, a worker can operate an interface to input the number of a designated terminal or find the terminal from a contact person, the voice call to the designated handheld terminal is initiated, after the call is initiated, the corresponding handheld terminal receives the call and is accompanied by a ringing prompt, meanwhile, a broadband fixed station displays the calling party through a display unit interface and is accompanied by a call prompt tone, after the handheld terminal is operated to answer, the worker can use the broadband fixed station to communicate with the handheld terminal, and when the communication is ended, the two parties can operate a hang-up key to end the communication.
The handle of the broadband fixed station has two modes, namely an off-hook mode and an on-hook mode, during the conversation, the speaking of a worker is collected by a microphone of the handle and then sent, when the speaking mode is the off-hook mode, the prompting tone and the conversation sound during the conversation of the broadband fixed station are played through a loudspeaker on the handle, and when the speaking mode is the on-hook mode, the prompting tone and the conversation sound during the conversation of the broadband fixed station are played through a loudspeaker connected with the control unit.
The acquisition and sending of the broadband fixed station to the audio data in the voice call are carried out in such a way that a control unit of the broadband fixed station acquires the audio data of a microphone on a handle through an interface unit, encodes the acquired audio data in a PCM format into audio data in an AMR format, and sends the audio data to a channel machine through the interface unit, the channel machine sends the audio data to a broadband core network through an antenna, the broadband core network sends the audio data to a specified handheld terminal, and the specified handheld terminal can play the audio data after decoding the audio data. The receiving and playing processing of the broadband fixed station to the audio data in the voice call is that an antenna of the broadband fixed station sends the received audio data coded by the handheld terminal to a channel machine, the channel machine sends the audio data to a control unit through an interface unit, and the control unit decodes the audio data in the AMR format into the PCM format after receiving the audio data and sends the PCM format to a loudspeaker for playing.
When needing to carry out video call with other handheld terminals in an LTE broadband core network environment, a worker can operate an interface to input the number of a specified terminal or find the terminal from a contact person, initiate a video call to the specified handheld terminal, after the call is initiated, the corresponding handheld terminal receives the call and is accompanied by a ringing prompt, meanwhile, a broadband fixed station displays the calling party through a display unit interface and is accompanied by a call prompt tone, after the operation handheld terminal answers, the worker can use the broadband fixed station to carry out call with the handheld terminal and can respectively display video pictures of the calling party on display screens of the two parties, and when the video call is ended, the two parties can operate a hang-up key to end the video call. The collection, sending, receiving and playing of the audio data in the video call are consistent with the processing of the collection, sending, receiving and playing of the audio data in the voice call function. The method comprises the steps that a control unit of the broadband fixed station collects a local video picture of a camera through an interface unit, the collected YUV format video data is displayed on a local display unit and is coded into H264 format video data, the video data is sent to a channel machine through the interface unit, the channel machine is sent to a broadband core network through an antenna, the broadband core network is sent to a designated handheld terminal, and the designated handheld terminal can display the decoded data. The broadband fixed station receives and plays video data in a video call, an antenna of the broadband fixed station sends the received video data coded by the handheld terminal to the channel machine, the channel machine sends the video data to the control unit through the interface unit, and the control unit decodes the video data in the H264 format into a YUV format after receiving the video data and sends the video data to the display unit for displaying.
When short data communication with other handheld terminals in an LTE broadband core network environment is needed, a worker can operate an interface to edit short messages and then send the short messages to a designated handheld terminal, and the designated handheld terminal can display the content of the received short messages after receiving the short messages. When local log copy needs to be carried out on the broadband fixed station, a worker accesses the USB interface or the OTG interface to the USB disk, after the broadband fixed station recognizes that the USB disk is accessed, the interface pops up to prompt the insertion of the USB disk, the interface log copy key is operated, the broadband fixed station retrieves all local log files, and copies all the log files to the USB disk. The logs mainly comprise main, system, event and crash, wherein the main log content is the most complete of the four types, the main log content comprises all other three types of content and is used for completely recording the running state of the broadband fixed station, the system log is used for recording the running state of the Android system of the broadband fixed station, the event log is used for storing the record of the user operating the broadband fixed station, and the crash is used for recording the abnormal state of the broadband fixed station.
When local upgrade is needed to be performed on the broadband fixed station, a worker copies an upgrade package into a USB flash disk in advance, the USB flash disk is accessed to an OTG interface, when the broadband fixed station recognizes that the USB flash disk is accessed, the interface pops up to prompt insertion of the USB flash disk, an interface program upgrade key is operated, the broadband fixed station retrieves an upgrade package program from a USB flash disk file directory, copies the retrieved upgrade package program into the broadband fixed station, and then automatically executes program upgrade.
The process of automatically executing the upgrade by the broadband fixed station comprises the steps of copying to a local app file, opening and executing installation in the current app program, exiting the operation of the current app program after the installation is finished, replacing and transferring the current app program by the installed app program, and starting the operation. When the remote log copy is needed to be carried out on the broadband fixed station, a worker can operate the control center network manager to send log upload control to the broadband fixed station, the broadband fixed station can retrieve all local log files after receiving log upload information, compress and pack all the log files, upload the log files to an appointed file directory of the control center network manager in a wireless FTP mode, the worker can check or copy the log of the broadband fixed station from the control center network manager, and the log types are the same. When the broadband fixed station needs to be upgraded remotely, a worker copies an upgrade package into a specified directory of a control center network manager in advance, the control center network manager can be operated to send remote upgrade control to the broadband fixed station, the broadband fixed station can be connected with the control center network manager in an FTP mode after receiving remote upgrade information, an upgrade package program is searched in a specified file directory, the searched upgrade package program is downloaded into the broadband fixed station, and then program upgrade is automatically executed. The process of automatically executing the upgrade by the broadband fixed station comprises the steps of downloading an apk file to the local, opening and executing installation in a current app program, exiting the operation of the current app program after the installation is finished, replacing and adjusting the current app program by the installed app program, starting the operation, and automatically sending information of successful installation to a control center network manager after the registration and network access.
Based on the embodiment, the voice call function, the video call function, the short data communication function, the local maintenance and the remote maintenance of the broadband fixed station can be realized.
Claims (10)
1. A method for realizing video call and remote maintenance of a broadband fixed station based on LTE is characterized in that: the implementation method is implemented based on an LTE broadband core network by using a broadband fixed station as an operation platform, and the broadband fixed station is pre-loaded with broadband cluster app software, and comprises the following steps:
registering and accessing the network: the broadband fixed station is started, the control unit initiates a network access request to the LTE broadband core network through the LTE channel machine according to the registration information, and after the network access is successful, the LTE channel machine analyzes the information of successful registration through the control unit according to the information of successful network access and displays the registration state through the display unit;
the voice call function: after the registration and the network access are finished, the display unit is operated to select the number to initiate the call, the display unit processes the voice call initiating information through the control unit, then the voice call initiating information initiates a voice call request to an LTE broadband core network through the LTE channel machine, and after the call is successfully established, the voice call is finished through the acquisition, sending, receiving and playing of audio data;
the video call function: after the registration and the network access are completed, operating the display unit to select the number to initiate the video call, processing the initiated video call information by the control unit through the initiated video call information by the display unit, initiating a video call request to an LTE broadband core network through the LTE channel machine, and completing the video call through the acquisition, sending, receiving and playing of audio data and the acquisition, sending, receiving and playing of video data after the video call is established;
short data communication function: after the registration and the network access are finished, the display unit is operated to select the number to send the short message, and after the display unit processes the short data information through the control unit, the short data information is sent to the LTE broadband core network through the LTE channel machine;
local maintenance: after the registration and the network access are finished, when the local log needs to be copied, a USB (universal serial bus) or OTG (on-the-go) interface of an interface unit is inserted into a U disk, a U disk insertion signal is processed by the control unit and then is sent to the display unit, the display unit displays a U disk insertion prompt, the display unit is operated to copy the log, and the local log of the control unit is copied to the U disk; when a local program needs to be upgraded, a USB (universal serial bus) or OTG (on-the-go) interface of an interface unit is inserted into a U disk, a U disk insertion signal is processed by the control unit and then sent to a display unit, the display unit displays a U disk insertion prompt, the display unit is operated to upgrade the program, and the local program of the control unit is upgraded;
remote maintenance: after the registration and the network access are finished, when the log needs to be copied remotely, network management software on a control center computer is operated, a remote maintenance request is sent to the appointed broadband fixed station, the request carries pull log information, the LTE channel machine sends the received remote maintenance request to a control unit through an interface unit, and the control unit uploads a local log to the control center network management computer after processing the remote maintenance request; when the program needs to be upgraded remotely, operating network management software on a control center computer, sending a remote maintenance request to a specified broadband fixed station, wherein the request carries upgrading information, sending the received remote maintenance request to a control unit through an interface unit by the LTE channel machine, and after processing the remote maintenance request by the control unit, downloading the upgraded program from the center network management computer and completing upgrading;
the broadband fixed station completes a voice call function, a video call function, a short data communication function, local maintenance and remote maintenance through broadband cluster app software.
2. The method for realizing video call and remote maintenance of the broadband fixed station based on the LTE of claim 1, wherein: the method for analyzing the information of successful registration by the control unit in the registered network access comprises the steps of calling the registered network access interface to access the network, starting to execute monitoring signal change and monitoring network access state after the network access interface is called, acquiring a signal value after the monitoring signal state is changed, updating an interface display signal, judging whether the network access is successful or not after the monitoring network access state is changed, updating the registration state of the interface if the network access is successful, and executing the registered network access interface again after 5 seconds if the network access is failed.
3. The method for realizing video call and remote maintenance of the broadband fixed station based on the LTE of claim 1, wherein: the processing process of the control unit in the voice call to the information of initiating the voice call comprises the steps of monitoring the call state, judging the current call information according to the call parameters after the call state is changed, updating an interface on the original application program assembly when the call state is a voice single call or a voice group call, then starting recording, judging the speaking right and the call state according to the call transient change, and ending the recording and storing the call information into a database when the call is ended.
4. The method for realizing video call and remote maintenance of the broadband fixed station based on the LTE of claim 1, wherein: the processing process of collecting, sending, receiving and playing the audio data in the voice call comprises the following steps that when the audio data are collected and sent, the control unit collects local audio data through a handle of the interface unit, encodes the audio data in the PCM coding format into audio data in the AMR format, sends the audio data to the LTE channel machine through the channel machine interface, and sends the audio data to the LTE broadband core network through the antenna by the LTE channel machine to finish the collection and sending of the audio data; when the audio data is received and played, the LTE channel machine sends the received audio data of the speech of the other party to the interface unit through the channel machine interface, the interface unit sends the audio data to the control unit, the control unit decodes the audio data from the AMR coding format into the PCM coding format and then sends the audio data to the loudspeaker, and the audio data is played through the loudspeaker, so that the receiving and playing of the audio data are completed.
5. The method for realizing video call and remote maintenance of the broadband fixed station based on the LTE of claim 1, wherein: the control unit in the video call monitors the call state, judges the current call information according to the call parameter after the call state is changed, pops up a new application program component to display the video when the call state is the video call, then starts recording the video, judges the speaking right and the call state according to the call transient change, and ends recording and stores the call information into the database when the call is ended.
6. The method for realizing video call and remote maintenance of the broadband fixed station based on the LTE of claim 1, wherein: the processing process of collecting, sending, receiving and playing the video data in the video call is that when the video data is collected and sent, the control unit collects local video data through a camera of the interface unit, encodes the video data in the YUV encoding format into data in the H264 format, sends the data to the LTE channel machine through the channel machine interface, and sends the data to the LTE broadband core network through the antenna by the LTE channel machine to finish the collection and sending of the video data; when the video data is received and played, the LTE channel machine sends the received video data of the opposite side to the interface unit through the channel machine interface, the interface unit sends the video data to the control unit, the control unit decodes the video data from the H246 coding format into the YUV coding format and then sends the YUV coding format to the display unit, and the display unit displays the video, so that the receiving and displaying of the video data are completed.
7. The method for implementing broadband fixed station video call and remote maintenance based on LTE of claim 1, wherein: the short data communication control unit processes the short data information by monitoring the short message service, storing the content of the short message into a buffer area after receiving the short message, carrying out protocol analysis in the buffer area, updating an interface after the analysis is finished, prompting a user to receive a new message, and storing the content of the short message into a database.
8. The method for realizing video call and remote maintenance of the broadband fixed station based on the LTE of claim 1, wherein: the processing process of the control unit in the local maintenance on the USB flash disk insertion signal is that after the USB flash disk is inserted into equipment, a USB flash disk packing path is obtained, when upgrading is needed, an APK file is searched, whether the program name of the APK file is the same as the current program name or not is judged, if not, an interface prompt cannot be installed, if yes, whether the version of the APK file is higher than the current version or not is continuously judged, if not, the interface prompt cannot be installed, if yes, the interface prompt clicks to install, and after clicking to install, a user can finish upgrading operation; when the log is required to be copied, whether the residual space of the target folder is enough is checked, if not, the interface prompts that the transmission cannot be carried out, and if so, the transmission is started, so that the log is copied.
9. The method for realizing video call and remote maintenance of the broadband fixed station based on the LTE of claim 1, wherein: the process of the control unit in remote maintenance to the remote maintenance request is that after creating an FTP client, all file paths needing to be transmitted are recursively acquired, network management information is analyzed, if the network management information is APK upgrade, an APK file is searched, whether the program name of the APK file is the same as the current program name is judged, if not, a failure information is sent to the network management, if yes, whether the version of the APK file is higher than the current version is continuously judged, if not, the failure information is sent to the network management, if yes, the APK is started to be downloaded, and after the APK is downloaded, APK installation is automatically executed, and remote upgrade can be completed; if the network management message is log copy, the local log file is compressed, then the local log file is uploaded to a designated path, and after the uploading is finished, a success message is sent to the network management, so that the remote log uploading can be finished.
10. The method for implementing broadband fixed station video call and remote maintenance based on LTE of claim 1, wherein: the broadband fixed station consists of a control unit, an interface unit, a display unit, a key unit, a loudspeaker, a handle, a camera, an LTE channel machine and a power supply unit and is used for supporting voice call, video call, short data communication, local maintenance and remote maintenance functions; the broadband fixed station is connected with the interface unit and used for realizing interface expansion of the control unit, is connected with the display unit and used for realizing interface display and touch operation, is connected with the key unit and used for realizing key control, and is connected with the loudspeaker and used for realizing playing of prompt tones and conversation sounds; the interface unit is connected with the handle and used for realizing the functions of applying and releasing the speaking right during voice call, connected with the camera and used for realizing the acquisition of local video during video service, connected with the LTE channel machine and used for realizing the function of registering and accessing the network of a broadband fixed station, and connected with the power supply unit and used for supplying power to the broadband fixed station; the debugging interface of the interface unit is used for software development and debugging of an external computer on the broadband fixed station, the broadcasting interface is connected with a broadcasting manufacturer and used for realizing a station broadcasting function, and the USB interface and the OTG interface are used for copying the U disk file and locally upgrading the broadband fixed station.
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