CN1997081B - A Bluetooth interface-based wireless terminal access method and device thereof - Google Patents

Abstract

A wireless terminal access device based on a Bluetooth interface, including an interface module and a control processing module group, the interface module further includes: an uplink interface and a Bluetooth wireless interface; the control processing module further includes an interface unit, a registration management unit, and a signal detection and generation unit , a protocol conversion unit, an information storage unit and a main control unit. The method includes a Bluetooth terminal registration process, a process of initiating a voice call from the PSTN network side to the Bluetooth terminal, a process of initiating a voice call from the Bluetooth terminal to the PSTN network side, a process of initiating voice release from the Bluetooth terminal side, and a process of initiating a voice call from the PSTN network side. The process of voice release, the process of uploading fixed-line SMS messages by Bluetooth terminals, the process of on-demand fixed-line SMS messages by Bluetooth terminals, and the process of downloading fixed-line SMS messages from PSTN networks.

Description

A Bluetooth interface-based wireless terminal access method and device thereof

technical field

The invention relates to a wireless terminal access technology in communication technology, in particular to a wireless terminal access device based on a bluetooth interface and a method for implementing the access.

Background technique

At present, the Bluetooth interface is gradually popularized in various wireless terminals, but the current application of the Bluetooth interface of the wireless terminal is mainly limited to data transmission and reception related to the wireless terminal, and the application range is not extensive. The main services of various wireless terminals, such as voice services, are still mainly completed through GSM or CDMA wireless channels of the mobile communication network, and the Bluetooth interface is only an additional function of the wireless terminal equipment. In this case, the use of equipment with bluetooth interface to extend the business of the existing fixed communication network has aroused everyone's interest.

For example, the published utility model patent 200320115378.3 proposes a wireless base station based on a Bluetooth interface, which can be used to extend the functions of fixed phones, similar to the functions of the current PHS. However, in the implementation scheme of this patent, more hardware functional components are used, and the processor, FSK/audio processing equipment, and interface circuits all use separate components, which have high cost and reduced reliability. In addition, the The patent has a lot of shortcomings in the realization of the service functions of the wireless base station, that is, there is no function of signal tone detection, and there is no clear method for realizing the fixed-line short message service. Generally speaking, it is similar to an enhanced cordless telephone system.

Contents of the invention

The technical problem to be solved by the present invention is to provide a wireless terminal access device based on the bluetooth interface, which can use the bluetooth interface to connect the wireless terminal to the fixed telecommunication service network.

In order to solve the above technical problems, the present invention provides a wireless terminal access device based on a Bluetooth interface, which is characterized in that it includes an interface module and a control processing module group, wherein:

The interface module further includes: an uplink interface and a Bluetooth wireless interface, and the uplink interface includes an analog user interface and an auxiliary circuit of a fixed telephone network;

The control processing module further includes: an interface unit, a registration management unit, a signal detection and generation unit, a protocol conversion unit, an information storage unit and a main control unit, wherein:

An interface unit, including an interface between the uplink interface and the control processing module, and an interface between the Bluetooth wireless interface and the control processing module;

The registration management unit is used to authenticate the Bluetooth terminal requesting registration, and save the registration information to the information storage unit;

A signal detection and generation unit is used to detect the data signal sent by the PSTN network and notify the main control unit, generate a data signal sent to the PSTN network according to the instruction of the main control unit and send it through the interface unit;

The protocol conversion unit is used to complete the protocol conversion of signaling and media flow between the PSTN network side protocol and the Bluetooth protocol;

The information storage unit is used to store the information of the wireless terminal access device itself, the information of the registered Bluetooth terminal, and the information in the process of voice service and short message service;

The main control unit is responsible for the state control of the entire device, the logic control and processing of the business process, the control and coordination of the actions of each unit and interface, and the completion of the functions of the Bluetooth protocol and the data link layer protocol in the PSTN network protocol.

Further, the above-mentioned wireless terminal access device can also have the following features: the signal detection and generation unit is used to detect the incoming DTMF or FSK signal, and generate and send the DTMF or FSK signal; the interface unit The interface used to interact with the uplink interface is a pulse code modulation interface.

Further, the above-mentioned wireless terminal access device may also have the following features: the control processing module also includes a signal tone detection unit, which is used to detect and analyze the signal tone of the telecommunication network service sent by the PSTN network, and notify the result to the main control unit.

Further, the above wireless terminal access device may also have the following features: the control processing module further includes a user interface interface and a user command processing unit, wherein the user interface interface is used for communication between the wireless terminal access device and the user interface Interaction; the user command processing unit is used to receive configuration, maintenance, debugging or test commands sent by the user interface through the user interface interface, perform corresponding operations and feedback result information, and the information storage unit is also used to store user Interface configuration information.

Furthermore, the above wireless terminal access device may also have the following feature: after the Bluetooth terminal is registered, the registration management unit also initiates a location update of the Bluetooth terminal to the PSTN network.

Furthermore, the above-mentioned wireless terminal access device may also have the following features: the control processing module uses an embedded microprocessor as a hardware platform.

The technical problem to be solved by the present invention is to provide a wireless terminal access method based on the bluetooth interface, which can use the bluetooth interface to connect the wireless terminal to the fixed telecommunication service network.

In order to solve the above-mentioned technical problems, the present invention provides a wireless terminal access method based on a Bluetooth interface, including a Bluetooth terminal registration process, which includes the following steps:

S11, the Bluetooth terminal searches for the wireless terminal access device through the Bluetooth protocol, and sends a registration request to it after searching, and the message carries the authentication information of the terminal;

S12. After receiving the registration request, the access device authenticates the terminal, and after the authentication passes, saves the registration information of the terminal to complete the registration.

Further, the above method may also have the following features: in the step S11, the registration request sent by the Bluetooth terminal includes the phone number of the Bluetooth terminal; in the step S12, after the authentication is passed, the access device also Initiate a location update to the network side, and report the phone number of the Bluetooth terminal. After the update is successful, the network side learns the current location information of the Bluetooth terminal.

Further, the above method may also have the following features: in the step S11, the authentication information of the Bluetooth terminal includes the phone number of the Bluetooth terminal, and in the step S12, the access device also establishes a Bluetooth address number and Correspondence between phone numbers.

Further, the above method can also have the following characteristics: it also includes a process of initiating a voice call from the PSTN network side to the Bluetooth terminal, and the process includes the following steps:

S21, the calling user initiates a call to the called user registered on the wireless terminal access device through the PSTN network, and the PSTN network sends a ring current signal to the access device through an analog subscriber line, and sends calling information and called information;

S22. After the access device detects the ringing current and the calling and called number information, it sends a call request to the bluetooth terminal of the called user through the bluetooth protocol, carrying the calling number information;

S23. After receiving the call request sent by the access device, the called Bluetooth terminal starts ringing, the called user picks up the phone, and the Bluetooth terminal notifies the access device through the Bluetooth protocol that the call can be started;

S24, the access device generates an off-hook signal and sends it back to the PSTN network through the subscriber line, establishes a voice channel between the access device and the Bluetooth terminal, and starts talking.

Further, the above method may also have the following features: in the step S22, the access device determines the bluetooth terminal to be called in this call according to the stored correspondence between the called number and the bluetooth terminal address.

Furthermore, the above method may also have the following feature: in the step S23, after the called Bluetooth terminal rings, it also returns a confirmation message to the access device.

Further, the above method can also have the following characteristics: it also includes a process of initiating a voice call from the Bluetooth terminal to the PSTN network side, and the process includes the following steps:

S31, the user initiates a call by dialing a number from the Bluetooth terminal, and the Bluetooth terminal sends a call request to the access device through the Bluetooth protocol, and transmits information of the calling terminal identifier and the called number;

S32. After the access device receives the call request, it saves the called number and the address of the Bluetooth terminal, generates an off-hook signal, and sends it to the PSTN network through the analog subscriber line, and detects that the PSTN network sends an unplug signal from the analog subscriber line. After the number tone, send the called number to the PSTN network;

S33, the PSTN network analyzes the number, finds the called user and rings the called user, and then sends a ringback tone or voice to the access device;

S34. After the access device detects the signal sent back by the PSTN network indicating that the called party has gone off-hook, it connects the two-way conversation between the network side and the Bluetooth terminal, and starts talking.

Further, the above method can also have the following features: in the step S32, after the access device detects the dial tone, it also sends the calling number to the PSTN network, and the calling number can be used by the bluetooth terminal in the call request or obtained by the access device according to the saved relationship between the terminal address and the phone number.

Further, the above method may also have the following features: in the step S34, the signal indicating that the called party has gone off-hook is a signal polarity inversion, ringback tone termination or voice termination signal on the subscriber line.

Further, the above method may also have the following characteristics: after the Bluetooth terminal establishes a call with the access device, during the call, the access device and the Bluetooth terminal interact through the Bluetooth protocol stack, the access After the device receives the signaling or media stream from the Bluetooth terminal or access device, it completes the conversion of the signaling and media stream between the Bluetooth interface and the PSTN interface, and forwards it to the peer device.

Further, the above method may also have the following characteristics: it also includes a process of initiating voice release from the Bluetooth terminal side, and the process includes the following steps:

Step S41, in the call state, the Bluetooth terminal user hangs up, initiates a release process, and the Bluetooth terminal sends a release message to the access device through the Bluetooth protocol;

Step S42, after the access device receives the release request from the Bluetooth terminal, it generates an on-hook signal, and sends it to the PSTN network through the analog subscriber line, and the PSTN performs release processing after receiving the signal;

Step S43, the access terminal releases the established wireless channel to the Bluetooth terminal through the Bluetooth protocol.

Further, the above method can also have the following characteristics: it also includes the process of initiating voice release from the PSTN network side, and the process includes the following steps:

Step S51, in the call state, the access device detects a busy tone signal from the subscriber line, indicating that the PSTN side has started the release process;

Step S52, the access device initiates a release request to the Bluetooth terminal, and at the same time, generates an on-hook signal and sends it on the subscriber line, telling the PSTN side that the user has hung up;

Step S53, the Bluetooth terminal and the access device release the established wireless channel through the Bluetooth protocol.

Further, the above method may also have the following characteristics: the data signal exchanged between the PSTN network and the access device adopts FSK or DTMF.

Further, the above method can also have the following characteristics: it also includes the process of uploading the fixed network short message message by the bluetooth terminal, and the process includes the following steps:

S61. The Bluetooth terminal initiates a short message call to the access device through the Bluetooth protocol, carrying calling number information;

S62. After receiving the calling message, the access device sends an upload request to the short message center on the network side, carrying the calling number information;

S63. After receiving the request and confirming that the calling user is valid, the short message center prepares to receive the uploaded information, and sends a confirmation message to the access device;

S64. After receiving the confirmation message, the access device notifies the Bluetooth terminal through the Bluetooth protocol that the identity confirmation has passed, and the short message can be sent;

S65. The Bluetooth terminal sends a short message to the access device through the Bluetooth protocol. After the access device receives the short message, it converts the data format recognizable by the network side, and sends the short message to the short message center on the network side through the analog subscriber line. message, the short message center receives and stores short messages;

S67. The short message center sends a release message to the access device. After receiving the message, the access device simulates the on-hook signal sent by the user phone to the network side, releases resources on the network side, and sends a release message to the Bluetooth terminal to complete the channel release process. .

Further, the above-mentioned method may also have the following characteristics: it also includes a process for the Bluetooth terminal to order fixed-line SMS messages, and the process includes the following steps:

S71. The Bluetooth terminal initiates a call to the access device through the Bluetooth protocol, carrying calling information;

S72. After receiving the calling message, the access device sends an upload request to the short message center on the network side, carrying the calling number information;

S73. After receiving the request and confirming that the calling user is valid, the short message center prepares to receive the uploaded information, and sends a confirmation message to the access device;

S74. After receiving the confirmation message, the access device notifies the Bluetooth terminal through the Bluetooth protocol that it can send an on-demand request, and the request carries the on-demand information required by the short message center;

S75, the Bluetooth terminal sends an on-demand request to the access device through the Bluetooth protocol, and after the access device receives the on-demand request, it forwards the on-demand request to the short message center on the network side, and the request carries the on-demand information required by the short message center;

S76. After the short message center points to play the request, it transmits the on-demand information to the access device. After the access device receives it, it converts it into the data format required by the Bluetooth protocol, and transmits the user's on-demand information to the Bluetooth terminal through the Bluetooth protocol;

Step S77, the Bluetooth terminal initiates a release process. After receiving the release message, the access device simulates the on-hook signal sent by the user phone to the network side, releases resources on the network side, and sends a release message to the Bluetooth terminal to complete the channel release process.

Further, the above-mentioned method can also have the following characteristics: it also includes the process of transmitting the fixed-line short message message through the PSTN network, including the following steps:

S81, the short message center initiates a call to the bluetooth terminal registered on the access device as the called party, and the call request is sent to the access device in the form of ringing to the user, and the identification code and the called number of the short message center are transmitted;

S82. After the access device detects the ringing, it receives the identification code and the called number of the short message center, and forwards the identification code to the corresponding Bluetooth terminal through the Bluetooth protocol;

S83, the called Bluetooth terminal judges whether the identification code of the short message center is correct, and if correct, sends a confirmation message to the access device through the Bluetooth protocol;

S84. After receiving the confirmation message, the access device sends the confirmation message to the short message center, and the access device and the Bluetooth terminal prepare to receive the short message;

S85, the short message center transmits a short message to the access device, and after receiving the short message, the access device converts the short message into a data format required by the Bluetooth protocol, and sends the short message to the called Bluetooth terminal;

S86. The short message center sends a release message to the access device. After receiving the message, the access device simulates the on-hook signal sent by the user phone to the network side, releases resources on the network side, and releases the channel with the Bluetooth terminal through the Bluetooth protocol. process.

Further, the above method can also have the following characteristics: the data signal sent by the access device to the PSTN network adopts FSK or DTMF mode, and the short message center on the side of the PSTN network sends the data signal to the access device Adopt the FSK method.

The present invention has following remarkable technical effect:

1. At present, the tariff level of fixed telephone is much lower than that of mobile telephone. After using the wireless terminal access equipment and method to access the fixed telephone network, the call cost can be greatly reduced. The convenience of the phone.

2. The mobile terminal can switch between Bluetooth and the mobile network. This switching can be set to be automatic, that is, once it leaves the coverage of the Bluetooth piconet, it can immediately switch to the mobile phone network to ensure the range of use of the terminal.

3. The wireless terminal access device and method can be used to realize the function of the fixed-line short message, so as to obtain all the services of the fixed-line short message.

The device of the present invention has low complexity and low cost, and can utilize the existing fixed telephone line and fixed data line of the user, without requiring the operator to lay a new network line for this purpose, so as to give full play to the function of the Bluetooth interface of the wireless terminal, and further excavate Potential of the fixed telephone network.

Description of drawings

FIG. 1 is a schematic structural diagram of a wireless terminal access system in an embodiment of the present invention.

FIG. 2A is a flow chart of a voice service for initiating a call from a PSTN network side to a Bluetooth terminal in an embodiment of the present invention.

Fig. 2B is a voice service flow chart of initiating a call from the Bluetooth terminal side to the PSTN network side in the embodiment of the present invention.

Fig. 2C is a flow chart of initiating voice release from the Bluetooth terminal side in the embodiment of the present invention.

Fig. 2D is a flow chart of initiating voice release from the PSTN network side in the embodiment of the present invention.

Fig. 3A is a flow chart of uploading a fixed network SMS message from a Bluetooth terminal in an embodiment of the present invention.

FIG. 3B is a flow chart of a bluetooth terminal ordering a fixed network SMS message in an embodiment of the present invention.

Fig. 3C is a flow chart of downlinking fixed-line short message message through PSTN network in the embodiment of the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

Fig. 1 shows the structure of the wireless terminal access device in this embodiment and its connection relationship with the user interface, the wireless terminal device and the network side.

The user interface can run on an ordinary PC, and the user can perform version maintenance, basic parameter and service parameter setting, debugging and testing of the access device through the user interface, such as printing out the operation status and related parameters of the access terminal , terminate and start program execution, view memory usage, and more.

The wireless terminal access device is mainly composed of an interface module and a control processing module.

The interface module further includes:

The uplink interface is composed of the analog user interface of the fixed telephone network, 10/100M Ethernet port and auxiliary circuit. The network can be used for software version upgrades.

The bluetooth wireless interface is used to implement data transmission and reception between the access device and the bluetooth terminal through the bluetooth protocol. There are voice communication applications and data communication applications in the Bluetooth protocol.

The control processing module further includes:

The PCM (Pulse Code Modulation) interface is used to transmit DTMF signals, FSK signals and analog user signaling between the control processing module and the interface module. These signaling include analog user off-hook signals, analog user on-hook signals, etc. (Is the analog user signaling transmitted through this interface?)

The HCI interface (Host Controller Interface: host-side control interface), used to control the communication between the processing module and the Bluetooth interface module, is a standard interface recommended in the Bluetooth protocol stack.

The main control unit is composed of an advanced embedded microprocessor and business software running on it, and is responsible for the state control of the entire system and the logic control and processing of related business processes, controlling and coordinating the actions of each unit and interface, and completing the Bluetooth protocol , The function of the data link layer protocol in the fixed network protocol.

The signal tone detection unit is used to detect and analyze the telecommunication network service signal tones sent from the network side through the uplink interface and the PCM interface, and notify the main control unit of the results. These signal tones include ringback tones, busy tones, dial tones, etc.

DTMF and FSK detection and generating unit, used for detecting the FSK or DTMF signal sent by PSTN network through the uplink interface and PCM interface, and notifying the main control unit of the result; and generating FSK signal or DTMF signal according to the main control unit, through The PCM interface and the uplink interface send to the PSTN network, and the detection and generation of DTMF and FSK signals are realized by the program according to the specific digital signal processing algorithm.

The information storage unit is used to store the registration information such as the address, user name, and telephone number of the Bluetooth terminal, the configuration information of the wireless terminal access device and the user interface, and information in the process of voice service and short message service, etc.

The registration management unit is used to check the user name and password, authenticate the Bluetooth terminal requesting registration, save the registration information to the information storage unit, initiate the location update of the terminal to the PSTN network, and report the phone number of the Bluetooth terminal, PSTN The network can know the location of the terminal.

The protocol conversion unit is used to complete the protocol conversion of signaling and media flow in the voice service and the fixed network short message service, including the conversion between the Bluetooth protocol and the fixed network short message protocol and between the Bluetooth protocol and the PSTN network protocol.

The user command processing unit is used to receive configuration, maintenance, debugging, testing and other commands sent by the user interface through the RS232 serial port or Ethernet port, perform corresponding operations and feedback result information.

RS232/network port, used for the interaction between the wireless terminal access device and the user interface.

It can be seen that compared with the Chinese patent (patent number: 200320115378.3), the wireless terminal access device of the present invention can not only realize the status control of the entire system and the logic control and processing of related business processes, but also realize the required Generation and detection of various signals. Moreover, the embedded microprocessor is adopted, and the whole device has obvious advantages in cost.

The following describes the access method of this embodiment. Before the system works, the user needs to set the relevant parameters of the wireless terminal access device through the user interface, including: the IP address of the computer used for maintenance, the IP address of the access device, the access The dialing method of the device, the DTMF sending level of the access device, etc. If the software needs to be upgraded, the directory where the software is stored should also be set.

After completing the configuration of the wireless terminal access device, you can place the wireless terminal access device in offices, homes, etc., insert an analog subscriber line into the analog subscriber line interface of the access device, and connect to the PSTN network. The bluetooth wireless signal emitted by the access device can cover a distance of less than 100 meters. General wireless terminal equipment such as general mobile phones with bluetooth interface only need to assign a phone number to it, and after slightly modifying the software, the bluetooth In the service area, you can use the Bluetooth interface to connect to the PSTN network through the wireless terminal access device to carry out related telecommunication services, and it has the convenience of a mobile phone.

The following describes in detail the Bluetooth device search and registration process, the voice service access processing flow, and the fixed network short message processing flow in the access method of this embodiment.

Bluetooth terminal search and registration process.

Step S110, the Bluetooth terminal searches for wireless terminal access devices through the Bluetooth protocol. According to different designs of the Bluetooth terminal, this search process can be initiated manually, or can be completed automatically after configuring relevant parameters;

Step S120, when the Bluetooth terminal searches for a wireless terminal access device, it sends a registration request to it, and the message carries the terminal's user name, password, and registration information such as the phone number assigned to it, and the user name can be a Bluetooth address number ;

Step S130, after the access device receives the registration request, it authenticates the terminal, after the authentication is passed, saves the registration information of the terminal, establishes the correspondence between the Bluetooth address number and the phone number, and initiates a location update to the network side, Report the phone number of the Bluetooth terminal, and complete the registration after the update is successful.

In this embodiment, a Bluetooth terminal access device can register up to 7 Bluetooth terminals.

The voice service access processing flow is divided into the processing process of initiating a call from the PSTN network side to the Bluetooth terminal and the processing process of initiating a call from the Bluetooth terminal side to the PSTN side.

Figure 2A shows the voice service flow of initiating a call from the PSTN network side to the Bluetooth terminal when the Bluetooth terminal accesses the fixed network through the wireless terminal access device, including the following steps:

Step S210, the calling user initiates a call to the called user registered on the access device through the PSTN network, and the PSTN network sends a ring current signal to the access device through the analog subscriber line, and sends calling information and called information, number Information can be FSK or DTMF;

Step S220, after the access device detects the ringing current and the calling and called number information, according to the saved corresponding relationship between the called number and the bluetooth terminal address, send a call request to the bluetooth terminal of the called user in the form of bluetooth protocol, carrying the call request of the called user call number information;

Step S230, after the Bluetooth terminal receives the call request sent by the access device, it starts ringing, and at the same time returns a confirmation message to the access device through the Bluetooth protocol;

Step S240, the called user picks up the phone, the Bluetooth terminal notifies the access device through the Bluetooth protocol that the call can be started, the access device generates an off-hook signal and sends it back to the PSTN network through the subscriber line, and establishes a voice call between the access device and the Bluetooth terminal. channel to start a call.

During the call establishment process or the subsequent call process, the access device and the Bluetooth terminal interact through the Bluetooth protocol stack, so both communication parties are required to support the Bluetooth protocol, and BluetoothRadio, Baseband, and LMP of the Bluetooth protocol stack can be provided , L2CAP, SDP, TCS-Bin layer functions. In this process, the wireless terminal access device completes the conversion of signaling and media streams between the Bluetooth interface and the PSTN interface.

During the conversation, after the analog subscriber line interface receives the voice signal or data signal (such as FSK signal) of the PSTN network, the main control unit reads these signals through the PCM interface and converts them into the data format required by the Bluetooth protocol. The bluetooth interface sends to the bluetooth terminal in the message format of the bluetooth protocol.

Figure 2B shows the voice service flow for initiating a call from the Bluetooth terminal side to the PSTN network side when the Bluetooth terminal accesses the fixed network through the wireless terminal access device, including the following steps:

Step S310, the user dials a number from the Bluetooth terminal to initiate a call, and the Bluetooth terminal sends a call request to the access device through the Bluetooth protocol, and transmits information such as the called number and the address of the Bluetooth terminal, and the calling number can be sent by the Bluetooth terminal, or by The access device is obtained according to the saved relationship between the terminal address and the phone number;

Step S320, after the access device receives the call request, it saves the called number in the message and the address of the Bluetooth terminal, generates an off-hook signal, sends it to the PSTN network through the analog subscriber line, and waits for a response from the PSTN network;

Step S330, after the access device detects the dial tone sent by the PSTN network via the subscriber line, it sends the called number to the PSTN network, and the calling number can be sent to the PSTN network together with the called number, which is not necessarily required on the PSTN side;

Step S340, after the PSTN network receives the called number, analyze the number, find the called user, and ring the called user, and then send a ringback tone or voice to the access device;

Step S350, the access device detects through its interface circuit that the polarity of the signal on the subscriber line is reversed, or detects a backward off-hook signal such as the termination of the ringback tone or the termination of the voice, indicating that the called party has already off-hooked, then the connection is made. The two-way conversation between the network side and the Bluetooth terminal starts talking.

Figure 2C shows the process of initiating voice release from the Bluetooth terminal side when the Bluetooth terminal accesses the fixed network through the wireless terminal access device:

Step S410, in the call state, the Bluetooth terminal user hangs up, initiates a release process, and the Bluetooth terminal sends a release message to the access device through the Bluetooth protocol;

Step S420, after the access device receives the release request from the Bluetooth terminal, it generates an on-hook signal and sends it to the PSTN network through the analog subscriber line. After the PSTN detects the on-hook signal through its interface circuit, it executes the release process;

Step S430, the access terminal initiates a release request to the Bluetooth terminal, the Bluetooth terminal releases the wireless channel, and returns a release completion message to the access device after completion, and both the access device and the Bluetooth terminal return to an idle state.

Figure 2D shows the process of initiating voice release from the PSTN network side when the Bluetooth terminal accesses the fixed network through the wireless terminal access device:

Step S510, in the call state, the access device detects a busy tone signal from the subscriber line, indicating that the PSTN side has started the release process;

Step S520, the access device initiates a release request to the Bluetooth terminal, and at the same time, generates an on-hook signal and sends it on the user line, telling the PSTN side that the user has hung up;

Step S530, the Bluetooth terminal releases the wireless channel, and returns a release completion message to the access device after completion, and both the Bluetooth gateway and the Bluetooth terminal return to an idle state.

Fixed-line SMS processing flow.

Figure 3A shows the flow of Bluetooth terminal uploading fixed network SMS messages when the Bluetooth terminal accesses the fixed network through the wireless terminal access device:

Step S610, the Bluetooth terminal initiates a short message call to the access device through the Bluetooth protocol, carrying the calling number information;

Step S620, after receiving the calling message, the access device sends an upload request to the short message center on the network side in FSK or DTMF mode, carrying the calling number information;

Step S630, the short message center receives the request, confirms that the calling user is valid, prepares to receive the uploaded information, and sends a confirmation message to the access device in FSK mode;

Step S640, after receiving the confirmation message from the network side, the access device notifies the Bluetooth terminal through the Bluetooth protocol that the identity confirmation has passed, and the short message can be sent;

Step S650, the Bluetooth terminal sends a short message to the access device through the Bluetooth protocol. After the access device receives the short message, it converts it into an FSK or DTMF signal, and sends the short message to the short message center on the network side through the user line, and the short message center receives the short message. and store short messages,

Step S670, the short message center sends a release message to the access device. After the access device receives it, it simulates the on-hook signal sent by the user phone to the network side, releases the resources on the network side, and sends a release message to the Bluetooth terminal to complete the release of the channel process.

Fig. 5B shows that when the Bluetooth terminal accesses the fixed network through the wireless terminal access device, the process of the Bluetooth terminal ordering the fixed network short message message includes the following steps:

Step S710, the Bluetooth terminal initiates a call to the access device through the Bluetooth protocol, carrying calling information;

Step S720, after receiving the calling message, the access device sends an upload request to the short message center on the network side in the form of FSK or DTMF, carrying the calling number information;

Step S730, the short message center receives the request, confirms that the calling user is valid, prepares to receive the uploaded information, and sends a confirmation message to the access device in FSK mode;

Step S740, after receiving the confirmation message, the access device notifies the Bluetooth terminal through the Bluetooth protocol that it can send an on-demand request, and the request carries the on-demand information required by the short message center;

Step S750, the Bluetooth terminal sends an on-demand request to the access device through the Bluetooth protocol. After the access device receives it, it converts it into an FSK or DTMF signal, and forwards the on-demand request to the short message center on the network side. The request carries the information required by the short message center. on-demand information;

Step S760, after the short message center points to play the request, it transmits the on-demand information to the access device in FSK mode. After the access device receives it, it converts it into the data format required by the Bluetooth protocol, and transmits the user's on-demand information to the Bluetooth terminal through the Bluetooth protocol. Information;

Step S770, the Bluetooth terminal initiates a release process. After receiving the release message, the access device simulates the on-hook signal sent by the user phone to the network side, releases resources on the network side, and sends a release message to the Bluetooth terminal to complete the channel release process.

Fig. 3C shows that when the Bluetooth terminal accesses the fixed network through the wireless terminal access device, the PSTN network downloads the flow of the fixed network short message message, including the following steps:

Step S810, the short message center initiates a call to the bluetooth terminal registered on the access device as the called party, and the call request is sent to the access device in the form of ringing to the user (that is, a ringing signal is transmitted), and the call request is sent to the access device in the form of FSK. Send the identification code of the short message center, the called number can be sent with the short message center identification code or with the call request, and sent in FSK or DTMF mode;

Step S820, after the access device detects the ringing, it receives the identification code and the called number of the short message center, and forwards the identification code to the corresponding Bluetooth terminal through the Bluetooth protocol;

Step S830, the called Bluetooth terminal judges whether the identification code of the short message center is correct, and if correct, sends a confirmation message to the access device through the Bluetooth protocol;

Step S840, after the access device receives the confirmation message, it sends the confirmation message to the short message center in FSK or DTMF mode, and the access device and the Bluetooth terminal are ready to receive the short message;

Step S850, the short message center transmits the short message to the access device in FSK mode, after the access device receives the short message, converts it into the data format required by the Bluetooth protocol, and sends the short message to the Bluetooth terminal through the Bluetooth protocol;

In step S860, the short message center sends a release message to the access device. After receiving the message, the access device simulates the on-hook signal sent by the user phone to the network side, releases resources on the network side, and completes the channel connection with the Bluetooth terminal through the Bluetooth protocol. release process.

In summary, the wireless terminal access device of the present invention can use the fixed telephone network to simulate the user interface to connect to the fixed telephone network, and the bluetooth wireless signal transmitted by it can form a bluetooth wireless piconet area, in this area, one or more A wireless terminal device can connect to the Bluetooth access device, and carry out voice call service and fixed-line SMS service through the fixed telephone network. At the same time, if the wireless terminal function supports multiple Handover between mobile networks can be set to be automatic, that is, once it leaves the coverage of the Bluetooth piconet, it can immediately switch to the mobile phone network to ensure the range of use of the terminal. And if the signal quality of wireless networks such as GSM and CDMA is not ideal enough in the bluetooth service area, the user can access the fixed telecommunication network through the wireless terminal to overcome this problem.

Claims (21)

1. A wireless terminal access device based on a bluetooth interface, characterized in that it includes an interface module and a control processing module group, wherein: The interface module further includes: an uplink interface and a Bluetooth wireless interface, and the uplink interface includes an analog user interface and an auxiliary circuit of a fixed telephone network; The control processing module further includes: an interface unit, a registration management unit, a signal detection and generation unit, a protocol conversion unit, an information storage unit, a main control unit and a signal tone detection unit, wherein: An interface unit, including an interface between the uplink interface and the control processing module, and an interface between the Bluetooth wireless interface and the control processing module; The registration management unit is used to authenticate the Bluetooth terminal requesting registration, and save the registration information to the information storage unit; A signal detection and generation unit is used to detect the data signal sent by the PSTN network and notify the main control unit, generate a data signal sent to the PSTN network according to the instruction of the main control unit and send it through the interface unit; The protocol conversion unit is used to complete the protocol conversion of signaling and media flow between the PSTN network side protocol and the Bluetooth protocol; The information storage unit is used to store the information of the wireless terminal access device itself, the information of the registered Bluetooth terminal, and the information in the process of voice service and short message service; The main control unit is responsible for the state control of the entire device, the logic control and processing of the business process, the control and coordination of the actions of each unit and interface, and the completion of the functions of the Bluetooth protocol and the data link layer protocol in the PSTN network protocol; The signal tone detecting unit is used for detecting and analyzing the telecommunication network service signal tone sent by the PSTN network, and notifying the main control unit of the result. 2. The wireless terminal access device according to claim 1, wherein said signal detection and generation unit is used to detect incoming DTMF or FSK signals, and generate and send DTMF or FSK signals; The interface used to interact with the uplink interface in the interface unit is a pulse code modulation interface. 3. The wireless terminal access device according to claim 1, wherein the control processing module further comprises a user interface interface and a user command processing unit, wherein the user interface interface is used for the wireless terminal access device to communicate with the user Interaction between interfaces; the user command processing unit is used to receive configuration, maintenance, debugging or test commands sent by the user interface through the user interface interface, perform corresponding operations and feedback result information, and the information storage unit also Used to store configuration information for the user interface. 4. The wireless terminal access device according to claim 1, wherein the registration management unit also initiates a location update of the Bluetooth terminal to the PSTN network after the Bluetooth terminal is registered. 5. The wireless terminal access device according to claim 1, wherein the control processing module uses an embedded microprocessor as a hardware platform. 6. A wireless terminal access method based on a bluetooth interface, comprising a bluetooth terminal registration process and a process of initiating a voice call from the PSTN network side to the bluetooth terminal, wherein, The Bluetooth terminal registration process includes the following steps: S11, the Bluetooth terminal searches for the wireless terminal access device through the Bluetooth protocol, and sends a registration request to it after searching, and the message carries the authentication information of the terminal; S12. After receiving the registration request, the access device authenticates the terminal, and after passing the authentication, saves the registration information of the terminal to complete the registration; The process of initiating a voice call from the PSTN network side to the Bluetooth terminal includes the following steps: S21, the calling user initiates a call to the called user registered on the wireless terminal access device through the PSTN network, and the PSTN network sends a ring current signal to the access device through an analog subscriber line, and sends calling information and called information; S22. After the access device detects the ringing current and calling and called number information, it converts the ringing current and calling and called number information into the data format required by the Bluetooth protocol, and transmits the Bluetooth protocol to the called user's Bluetooth The terminal sends a call request, carrying the calling number information; S23. After receiving the call request sent by the access device, the called Bluetooth terminal starts ringing, the called user picks up the phone, and the Bluetooth terminal notifies the access device through the Bluetooth protocol that the call can be started; S24, the access device generates an off-hook signal and sends it back to the PSTN network through the subscriber line, establishes a voice channel between the access device and the Bluetooth terminal, and starts talking. 7. The method according to claim 6, characterized in that, in the step S11, the registration request sent by the Bluetooth terminal includes the phone number of the Bluetooth terminal; in the step S12, after the authentication is passed, the The access device also initiates a location update to the network side and reports the phone number of the Bluetooth terminal. After the update is successful, the network side learns the current location information of the Bluetooth terminal. 8. The method according to claim 7, wherein in the step S11, the authentication information of the Bluetooth terminal includes the phone number of the Bluetooth terminal, and in the step S12, the access device also establishes Correspondence between Bluetooth address numbers and phone numbers. 9. The method according to claim 6, characterized in that, in the step S22, the access device determines the bluetooth terminal as the called party for this call according to the stored correspondence between the called number and the bluetooth terminal address. terminal. 10. The method according to claim 6, characterized in that, in the step S23, after the called Bluetooth terminal rings, it returns a confirmation message to the access device. 11. The method according to claim 6, further comprising the process of initiating a voice call from the bluetooth terminal to the PSTN network side, the process comprising the following steps: S31, the user initiates a call by dialing from the Bluetooth terminal, and the Bluetooth terminal sends a call request to the access device through the Bluetooth protocol, and transmits information of the calling terminal identifier and the called number; S32. After receiving the call request, the access device saves the called number and the address of the Bluetooth terminal, generates an off-hook signal, sends it to the PSTN network through the analog subscriber line, and detects the dialing sent by the PSTN network from the analog subscriber line After the tone, send the called number to the PSTN network; S33, the PSTN network analyzes the number, finds the called user and rings the called user, and then sends a ringback tone or voice to the access device; S34. After the access device detects the signal sent back by the PSTN network indicating that the called party has gone off-hook, it connects the two-way conversation between the network side and the Bluetooth terminal, and starts talking. 12. The method according to claim 11, characterized in that, in the step S32, after the access device detects the dial tone, it also sends the calling number to the PSTN network, and the calling number can be used by the bluetooth terminal Carried in the call request, or obtained by the access device according to the saved relationship between the terminal address and the phone number. 13. The method according to claim 11, characterized in that, in the step S34, the signal indicating that the called party has gone off-hook is a signal polarity reversal, ringback tone termination or voice termination signal on the subscriber line . 14. The method according to claim 6 or 11, wherein after the Bluetooth terminal establishes a call with the access device, during the call, the access device and the Bluetooth terminal interact through the Bluetooth protocol stack , after receiving the signaling or media stream from the Bluetooth terminal or PSTN network, the access device completes the conversion of the signaling and media stream between the Bluetooth interface and the PSTN interface, and forwards it to the peer device. 15. The method according to claim 6 or 11, further comprising the process of initiating voice release from the bluetooth terminal side, the process comprising the following steps: Step S41, in the call state, the Bluetooth terminal user hangs up, initiates a release process, and the Bluetooth terminal sends a release message to the access device through the Bluetooth protocol; Step S42, after the access device receives the release request from the Bluetooth terminal, it generates an on-hook signal, and sends it to the PSTN network through the analog subscriber line, and the PSTN performs release processing after receiving the signal; Step S43, the access terminal releases the established wireless channel to the Bluetooth terminal through the Bluetooth protocol. 16. The method according to claim 6 or 11, further comprising the process of initiating voice release from the PSTN network side, the process comprising the following steps: Step S51, in the call state, the access device detects a busy tone signal from the subscriber line, indicating that the PSTN side has started the release process; Step S52, the access device initiates a release request to the Bluetooth terminal, and at the same time, generates an on-hook signal and sends it on the subscriber line, telling the PSTN side that the user has hung up; Step S53, the Bluetooth terminal and the access device release the established wireless channel through the Bluetooth protocol. 17. The method according to claim 6 or 11, wherein the data signals exchanged between the PSTN network and the access device adopt FSK or DTMF. 18. The method according to claim 6, further comprising the process of uploading a fixed network short message by a bluetooth terminal, the process comprising the following steps: S61. The Bluetooth terminal initiates a short message call to the access device through the Bluetooth protocol, carrying calling number information; S62. After receiving the calling message, the access device sends an upload request to the short message center on the network side, carrying the calling number information; S63. After receiving the request and confirming that the calling user is valid, the short message center prepares to receive the uploaded information, and sends a confirmation message to the access device; S64. After receiving the confirmation message, the access device notifies the Bluetooth terminal through the Bluetooth protocol that the identity confirmation has passed, and the short message can be sent; S65. The Bluetooth terminal sends a short message to the access device through the Bluetooth protocol. After receiving the short message, the access device converts the short message into a data format recognizable by the network side, and transmits the short message to the network side through the analog subscriber line. The message center sends short messages, and the short message center receives and stores short messages; S67. The short message center sends a release message to the access device. After receiving the message, the access device simulates the on-hook signal sent by the user phone to the network side, releases resources on the network side, and sends a release message to the Bluetooth terminal to complete the channel release process. . 19. The method according to claim 6, further comprising the process of bluetooth terminals ordering fixed network short messages, the process comprising the following steps: S71. The Bluetooth terminal initiates a call to the access device through the Bluetooth protocol, carrying calling information; S72. After receiving the calling message, the access device sends an upload request to the short message center on the network side, carrying the calling number information; S73. After receiving the request and confirming that the calling user is valid, the short message center prepares to receive the uploaded information, and sends a confirmation message to the access device; S74. After receiving the confirmation message, the access device notifies the Bluetooth terminal through the Bluetooth protocol that it can send an on-demand request, and the request carries the on-demand information required by the short message center; S75, the Bluetooth terminal sends an on-demand request to the access device through the Bluetooth protocol, and after the access device receives the on-demand request, it forwards the on-demand request to the short message center on the network side, and the request carries the on-demand information required by the short message center; S76. After the short message center receives the play request, it transmits the request information to the access device. After receiving the request, the access device converts it into the data format required by the Bluetooth protocol, and transmits the user request information to the Bluetooth terminal through the Bluetooth protocol. ; Step S77, the Bluetooth terminal initiates a release process. After receiving the release message, the access device simulates the on-hook signal sent by the user phone to the network side, releases resources on the network side, and sends a release message to the Bluetooth terminal to complete the channel release process. 20. The method according to claim 6, further comprising the process of transmitting the fixed network short message through the PSTN network, comprising the following steps: S81, the short message center initiates a call to the bluetooth terminal registered on the access device as the called party, and the call request is sent to the access device in the form of ringing to the user, and the identification code and the called number of the short message center are transmitted; S82. After the access device detects the ringing, it receives the identification code and the called number of the short message center, and forwards the identification code to the corresponding Bluetooth terminal through the Bluetooth protocol; S83, the called Bluetooth terminal judges whether the identification code of the short message center is correct, and if correct, sends a confirmation message to the access device through the Bluetooth protocol; S84. After receiving the confirmation message, the access device sends the confirmation message to the short message center, and the access device and the Bluetooth terminal prepare to receive the short message; S85, the short message center transmits a short message to the access device, and after receiving the short message, the access device converts the short message into a data format required by the Bluetooth protocol, and sends the short message to the called Bluetooth terminal; S86. The short message center sends a release message to the access device. After receiving the message, the access device simulates the on-hook signal sent by the user phone to the network side, releases resources on the network side, and releases the channel with the Bluetooth terminal through the Bluetooth protocol. process. 21. The method according to claim 18, 19 or 20, wherein the data signal sent by the access device to the PSTN network adopts FSK or DTMF mode, and the short message center on the PSTN network side sends to The data signal of the access device adopts FSK mode.

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