RU113900U1 - DEVICE FOR TRANSMITTING AND RECEIVING INFORMATION ON A RADIO COMMUNICATION NETWORK - Google Patents

Abstract

A device for transmitting and receiving information in a radio communication network, containing a loudspeaker, a microphone, a push-to-talk mode button (NIG), characterized in that a series-connected automated workstation (AWS), a single-board computer, a controller, a transmitter, a switch, an antenna a feeder device, the output of which is connected to the second input of the switch, the second output of which is connected to the input of the receiver, the output of which is connected to the second input of the controller, the third output of which is connected to the third input of the switch, the second output of the controller - to the second input of the single-board computer, the second output of which is connected to the AWP input, the microphone through an analog-to-digital converter (ADC) is connected to the fourth input of the controller, the fourth output of which through a digital-to-analog converter (DAC) is connected to the loudspeaker, in addition, the "NIG" mode button is connected to the third input of the controller, and the single-board computer is the transmitting side performs the function of splitting the incoming files at its first input, in part by r bits, forming a packet for transmission from a part of the file by adding service information, the generated data packet comes from the first output of the single-board computer to the first input of the controller, which generates a frame for transmission from the packet with the addition of its service part and sends it to its first output, in addition, the controller divides the stream of speech data arriving at its fourth input into blocks, adds service information to them, generates a frame for transmission and sends it to its first output, on the receiving side received frames of speech and data come to the second input of the controller, which

Description

The utility model relates to the field of radio engineering and can be used to create information transmission networks with an increased number of subscribers.

The known method and device described in the patent of Russian Federation No. 2374774, H04W 92/10, "Method and device for controlling the speed of voice services in a mobile communication system that supports voice services through a packet network", in which voice information is converted from analog to digital, is divided into packets and it is transmitted to the addressee by means of the global system of mobile communications (GSM) and the general packet radio transmission service (GPRS), moreover, the transmission speed of voice information can be different, which is provided by adaptive multi-speed FROM, and itself speed is controlled by receiving control messages from a radio network controller (RNC).

The disadvantage of a device that implements the described method is that when building a voice information exchange network with its use, a global mobile communication system is used as a transmission medium, which limits the versatility and does not allow the use of this device to create special-purpose networks, distributed networks with arbitrary dynamically changing topology, in addition, a decrease in the transmission rate of voice information is associated with a deterioration in its quality.

The closest in technical essence to the proposed one is a device constructed according to the implementation scheme of the method described in RF patent No. 2258321, H04Q 7/28, "Wireless transmission of voice signals through the Internet using a click of a button to switch to transmission mode", adopted as a prototype .

The prototype device is presented in figure 1, where the following notation is introduced:

2 - loudspeaker;

3 - microphone;

4 - button “press and speak” (NIG);

13 - software (software) administrator speech codec;

14 - microbrowser (MB);

15 - outgoing stream;

16 - incoming stream.

The prototype device contains a series-connected button "NIG" 4, the input stream 16, a microbrowser 14, which includes the administrator software of the speech codec 13, the first output of which is connected to the input of the speaker 2, the second output of which is connected to the input of the button "NIG" 4, the output-input of which is the input-output of the prototype device, the microphone output 3 is connected to the input of the outgoing stream 15, the output of which is connected to the second input of the administrator software of the speech codec 13.

The prototype device operates as follows.

On the transmitting side, the microphone 3 converts the sound vibrations of speech into electrical ones, then through the outgoing stream 15, the electrical vibrations enter the microbrowser 14, in which the administrator of the speech codec 13, in turn, digitizes the incoming electrical speech signal, divides it into packets, and transfers the buttons “ NIG »4. If the button is pressed, packets of voice information arrive in the transmission medium, which is the Internet or the intranet. If the button "NIG" 4 is not pressed, the receipt of packets of voice information in the transmission medium does not occur.

On the receiving side, voice data packets are received at the input of the NIG button 4. If the button is pressed, voice information packets do not arrive at its output. If the button "NIG" 4 is not pressed, the packets of voice information come from its output through the incoming stream 16 to the input of the microbrowser 14, in which the administrator software of the speech codec 13 extracts the voice information from the packets and translates it into an analog form. From the output of the microbrowser 14, voice information in the form of electrical vibrations is fed to the input of the loudspeaker 2, which translates them into the form of sound vibrations.

The disadvantage of the prototype device is that when building a network for exchanging voice information using these devices, the Internet or an intranet is used as a transmission medium, which limits the universality of the device and does not allow it to be used to create special-purpose networks in a mobile communication network with a dynamic configuration and arbitrary topology, in addition, the information exchange network using these devices is built on the basis of network-centric topology, which reduces its survivability.

The objective of the proposed device is to increase the maximum possible number of subscribers in an information exchange network built using the proposed devices, to ensure the universality of the proposed device to achieve its applicability in building an information exchange network without reference to any other network, to provide the possibility of building a distributed information exchange network with an arbitrary dynamically changing topology based on the proposed devices and increasing its survivability.

To solve the problem, a device containing a loudspeaker, a microphone, a push-and-talk (NIG) button, according to a utility model, introduces a series-connected automated workstation (AWS), a single-board computer, a controller, a transmitter, a switch, an antenna-feeder device the output of which is connected to the second input of the switch, the second output of which is connected to the input of the receiver, the output of which is connected to the second input of the controller, the third output of which is connected to the third input of the switch, the second output to the scooter - with the second input of a single-board computer, the second output of which is connected to the input of the automated workstation, the microphone is connected via an analog-to-digital converter (ADC) to the fourth input of the controller, the fourth output of which is connected to the loudspeaker through a digital-to-analog converter (DAC), in addition, the button “NIG” mode is connected to the third input of the controller.

Figure 2 presents a diagram of the proposed device, where the following notation:

1 - workstation (AWP);

2 - loudspeaker;

3 - microphone;

4 - push-and-talk mode button (NIG);

5 - digital-to-analog converter (DAC);

6 - analog-to-digital Converter (ADC);

7 - single-board computer;

8 - controller;

9 - transmitter;

10 - receiver;

11 - switch;

12 - antenna feeder device.

The proposed device contains a series-connected AWP 1, single-board computer 7, controller 8, transmitter 9, switch 11, antenna-feeder device 12, the output of which is connected to the second input of the switch 11, the second output of which is connected to the input of the receiver 10, the output of which is connected to the second the input of the controller 8, the second output of which is connected to the second input of the single-board computer 7, the second output of which is connected to the input of the AWP 1. In addition, the microphone output 3 through the ADC 6 is connected to the fourth input of the controller 8, the fourth output of which is black The DAC 5 is connected to the input of the speaker 2. The output of the NIG mode button 4 is connected to the third input of the controller 8, the third output of which is connected to the third input of the switch 11.

The proposed device for transmitting and receiving information in a radio communication network operates as follows.

The proposed device is used in the construction of an information exchange network. At the stage of network deployment, one of the devices is considered to be the master, the rest - slaves. The exchange of information is carried out with a temporary separation of subscribers. The timing diagram of the implementation of radio communications for the case of n subscribers is presented in figure 3. The entire exchange of information is divided into time windows for m ms and time cycles for n time windows, and n is equal to the number of subscribers in the network. Each second fits in i time cycles. The master device assigns conditional serial numbers to all other devices in the network, and also determines in which numbers of time windows each of the radio stations in the network will transmit in m ms, during all other time windows it works for reception. With this algorithm for organizing communication in a network of n subscribers, each of the subscribers has at its disposal a resource of (square brackets mean the integer part of the number, and 1000 in the numerator indicates the number of milliseconds in one second) transmission windows, the first subscribers are available transmission window. The maximum number of subscribers in the network is limited so that each of the subscribers has at least 2K time windows for transmission to enable the transmission of voice information (voice windows) with the specified quality and delay parameters from where

P

Where - the maximum number of subscribers in the network.

In addition, the master device for transmitting and receiving information sends the slave initial network connectivity tables that determine the routing of the transmitted information packets. At the end of the deployment phase, all the radio stations in the network possess the necessary data for work and become equal.

AWP 1 is a personal computer, the information on which is stored in the form of files. On the transmitting side, from the output of the AWP 1, the files begin to be transmitted to the first input of the single-board computer 7, which splits the file into parts by p bits, forms a packet for transmission from the part of the file by adding overhead information. The generated data packet comes from the first output of a single-board computer 7 to the first input of the controller 8, which forms a frame for transmission from the packet with the addition of its service part. The described splitting of the file into packets and the formation of frames from them are presented in Fig.4. From the first output of the controller 8, the frame is fed to the input of the transmitter 9, which generates a modulated information signal at the radio frequency, feeds it to the first input of the switch 11, which ensures the passage of the signal from the first input to the first output in the time window that was assigned for this device receiving and transmitting information as a temporary window for transmission. From the first output of the switch 11, the signal is fed to the input of the antenna-feeder device 12, through which the information signal is transmitted to space. The switch also provides the passage of the signal from the antenna-feeder device 12 from its second input to its second output in all other time windows.

In parallel with the transmission of data from AWP 1, there is a transmission of voice information. Each subscriber’s radio station has K time windows for transmitting voice information per second, while 2K time windows per second are required for voice with the required quality and delay not exceeding the allowable limit. In order to bring the required number of windows per second for transmitting voice information from K to 2K, the NIG button 4 is activated, the output of which sends a signal to the fourth input of controller 8, which provokes the controller 8 to generate a service request frame, which is transmitted to the subscriber at the far end of the radio link with which the voice communication channel is organized. The request frame is a frame in the service part of which a special field is set, indicating that a request is being made for the receiving device K to allocate its time windows in favor of the sending device of the request frame. Upon receipt of this request frame, the radio station at the far end of the radio line is put into receive mode in those windows that were originally allocated to it for transmitting voice information, and it itself forms a receipt frame that informs the device for transmitting and receiving information at the near end about the possibility of producing speech transmission in the windows thus vacated. If initially at the radio station at the near end of the radio line K windows were reserved per second for transmitting voice information, which is not enough to ensure the necessary speech quality, then after receiving a receipt frame from the far end of the radio line, 2K windows per second for voice transmission are already available (To their windows and K subscriber windows at the far end), which is quite enough for voice transmission with the necessary quality and delay. Thus, through the use of the proposed device when building an information exchange network, the number of windows reserved for each subscriber for speech becomes K, not 2K, therefore, according to relation (1), we obtain

From the formula (2) it is seen that the maximum allowable number of subscribers in the communication network increases by 2 times. The allocation of their time windows intended for the transmission of voice information by the radio station at the far end is made if the NIG button 4 is not activated on it, otherwise the service receipt frame is sent back, which signals the impossibility of selecting speech windows. Thus, by replacing the communication mode in the voice channel from duplex to half duplex, we obtain an increase in the maximum number of subscribers in the communication network with a constant throughput of communication channels. At the end of the voice message from the subscriber at the near end of the radio line, the NIG button 4 is deactivated, as a result of which a signal is received from its output to the fourth input of controller 8, which provokes the formation by the controller 8 of a service frame request to release the voice windows of the subscriber’s radio station at the far end of the radio line . This request frame is transmitted to the subscriber at the far end of the radio link, and upon receiving it, the speech windows of the device for transmitting and receiving information at the far end are freed. The described algorithm is illustrated in figure 5.

Direct voice information is transmitted in the following order. Through microphone 3, sound vibrations are converted into electrical ones and from the output of microphone 3 are fed to the input of the ADC 6, which converts the electrical vibrations into digital form and feeds them from its output to the fourth input of the controller 8, which divides the input stream of speech data into blocks, adds to them service information and forms a frame for transmission. This frame is transmitted from the first output of the controller 8 to the input of the transmitter 9, which generates a modulated information signal at the radio frequency, feeds it to the first input of the switch 11, which provides the connection of its first input to the first output in the time window for transmission and the connection of its second input to second exit in all other time windows. From the first output of the switch 11, the signal is fed to the input of the antenna-feeder device 12, through which the information signal is transmitted to space. To increase the transmission efficiency in the absence of voice information for transmission, the corresponding time windows of the subscriber are allocated for data transmission.

On the receiving side, the radio signal entering the input of the antenna-feeder device 12 is transmitted through the switch 11 to the input of the receiver 10, from the output of which the received frames of speech and data are fed to the second input of the controller 8, which removes frame redundancy and sends the selected information packets from its second output to the second input of a single-board computer 7, which removes redundancy from packets, accumulates and combines them into files, and then transfers it from its second output to the input of a workstation 1. Parallel flax this selected voice packets received from the DAC 5, which translates the voice packets to analog and provides the input to a loudspeaker 2 which converts the input fourth controller 8 outputs electric vibrations into sound.

Thus, in the proposed device is achieved:

- increase the maximum possible number of subscribers in the information exchange network built using the proposed devices,

- ensuring the versatility of the proposed device to achieve the possibility of its use in building a network for the exchange of information without reference to any other information exchange network,

- providing the ability to build a distributed network for the exchange of information with an arbitrary dynamically changing topology based on the proposed devices and increasing its survivability.

Claims (1)

A device for transmitting and receiving information in a radio communication network containing a loudspeaker, a microphone, a push-and-talk (NIG) button, characterized in that a series-connected automated workstation (AWP), single-board computer, controller, transmitter, switch, antenna feeder device, the output of which is connected to the second input of the switch, the second output of which is connected to the input of the receiver, the output of which is connected to the second input of the controller, the third output of which is connected to the third input of the switch, the second controller output - with the second input of a single-board computer, the second output of which is connected to the ARM input, the microphone is connected to the fourth input of the controller through an analog-to-digital converter (ADC), the fourth output of which is connected to the loudspeaker through a digital-to-analog converter (DAC), in addition, the mode button "NIG" is connected to the third input of the controller, and a single-board computer on the transmitting side performs the function of splitting the files arriving at its first input into parts by bits, forming a packet for transmission from part of the file by adding service information, the generated data packet arrives from the first output of a single-board computer to the first input of the controller, which forms a frame for transmission from the packet with the addition of its service part and feeds it to its first output, in addition, the controller divides the stream of speech data received at its fourth input, to the blocks, adds service information to them, forms a frame for transmission and feeds it to its first output, on the receiving side, received frames of speech and data go to the second input of the controller, the second removes personnel redundancy and sends the selected information packets from its second output to the second input of a single-board computer, which removes the redundancy from the packets, accumulates and combines them into files, and then transfers it to its second output, while the controller also selects speech packets and transmits them on your fourth exit.