The data adapter
(57) Abstract:The data adapter, functioning as an intermediate link between the information terminal and the digital data network is implemented by using parts usually available in the information terminal, in the management of their work through the command processor written in the memory of the information terminal. The technical result consists in carrying out the functions of the data adapter electrical methods using parts and components already available in computers, in particular the management of their work. 3 C. and 15 C.p. f-crystals, 9 Il. The invention relates to a method and equipment for transmitting and receiving data in a network of mobile stations by using a terminal device such as a personal computer, connected to a digital mobile station via a standard serial port.Traditional modem is an electronic device designed for mutual adaptation of various characteristics of the data terminal device and the telephone network. These characteristics may vary, for example, in relation to the type of signal (digital/analog), the level of voltage is Partsvania methods used in the devices involved in the transfer of data, and ensure the efficiency and reliability of communications. Error correction can be given as an example of the data transfer Protocol according to which the transmitting device adds to the data you want to send controlling signals in accordance with any applicable standard. Comparing the obtained data with the controlling signals, the receiver is able to install, did you ever think when you transfer data any errors.Traditional modem connected to the serial port of the terminal. Embodiments of the device vary depending on what physical bus device connected to the terminal. As an example, hereinafter referred to as the terminal is considered a computer equipped with an application program, such as a Fax program that requires the use of a modem. As shown in Fig. 1, the modem 1 may be an external device connected to the serial port of the terminal 4 and to the fixed telephone network 2 via a cable 3. Can be used and the so-called modem card 5, is connected directly to the internal bus of the computer 4 (Fig. 2) île Memory Card Personal Computer). The term "modem" refers to devices designed for stationary networks, mainly analog telephone networks. The device 7 according to Fig. 3. performing the functions of a modem in a digital mobile phone networks is called a data adapter. Since the present invention relates primarily to data transmission in a digital mobile telephone network provided by the present invention a device for data transmission from the terminal to the mobile station operating in a mobile telephone network, called here the data adapter.From the point of view of data transmission, the data adapter in digital telephone networks, regardless of its physical form execution is treated by the computer as a serial port, such as COM port 9 in a personal computer (PC Fig. 4). Although in Fig. 4 in the example shown, the modem 10, the traditional data adapter communicates with an application program 8 is completely similar way, through the port 9 (the COM port of the PC). Under control of the application program to the computer via the selected serial port 9 directs the output D/out in the modem 10 and thence to the telephone network 2 and reads the output of D/in the serial is the access signals, going from the modem to the telephone network 2, or coming from the telephone network to the modem. A computer or a corresponding terminal provides the supply to the modem or data adapter control commands and settings, using the so-called AT commands (see Fig. 4), fed them to the serial port 9 through which it is connected with the modem or data adapter. Produced by the modem or data adapter responses to commands can be read from the same serial port. For receiving and reading commands, the modem 10 or the data adapter must be in the so-called command condition, and the term AT - the team due to the fact that in accordance with common practice all commands given to the modem or data adapter, start with Latin letters AT.The computer's processor does not communicate directly with the physical port 9, a managed application program 8: between them is the controller 11 port implemented in the computer preferably as a program controller port (Fig. 5). The controller 11 port contains data about what address in memory space is path 12 UART (Universal Asynchronous Receiver Transmitter Universal Asynchronous Receiver Transmitter), managing the desired port, and what signal is on the data. Standard connector serial port (e.g. RS - 232) contains the corresponding lines for incoming and outgoing asynchronous data, and so-called handshake line (communication) to control the data transfer. If, as shown in Fig. 6, the modem or data adapter 7 is connected to the input bus of the computer device 4 or to the connector PCMCIA transmitted and received data passes through the UART circuit 15 inside the modem or data adapter, and not through the corresponding UART-loop computer. In the embodiment of Fig. 6 functions of the modem performs the adapter card 7 data because the data is in a digital mobile telephone network.Shortcomings of traditional modem (or data adapter) connected with the fact that it is a separate electronic device that must be purchased and installed before the data can be transmitted over the telephone network. Once installed, the modem or data adapter reserves one serial port, and if the modem card is one more slot to install the card. To use a data adapter that is compatible with PCMCIA needed a PCMCIA interface, which, therefore, cannot be used for other vspomogateljnye mechanical and electrical tolerances and specifications, as well as the actual manufacturing defects can create difficulties between computer and modem, despite all standardization efforts.Modem or data adapter usually has adjustable settings or switches that before installing it in the computer must be installed in a certain position, subsequent modification of which is difficult. The structure and components of the modem can limit its use in various operating modes, and if the data transfer Protocol changes, this may lead to the need to replace the modem or some of its parts. To connect the modem and the phone requires a special cable, which usually does not meet the standards of the compounds used in computers.The present invention is to avoid the above disadvantages of the conventional modem or data adapter. This problem is solved by performing the functions of the data adapter electrical methods, using parts and components already available in computers, and in particular the management of their work.The method corresponding to the present invention, characterized by the fact that Yonago terminal, and data processed by the external device connected to the information terminal is in the controller device, installed in the information terminal, and for providing data conversion handles communication:
- with the specified application program via the communication controller managing the transfer of data within the data terminal, and
- controller port, which is connected with an external device and controls the port connected through the specified controller.Information terminal according to the present invention is characterized by the fact that it contains a controller for processing the transmitted data, which is in contact with the specified communication controller for data transfer
- between the specified controller device and the specified application program, and
- between the specified controller device and the specified controller port.A device controller according to the present invention is characterized by the fact that he is in contact with the specified communication controller to transmit data
- between the specified controller device and the specified application program, and
- between the specified Conte with reference to the accompanying drawings, which depict the following:
Fig. 1 illustrates the use of the computer and an external modem in accordance with the prior art in the fixed telephone network;
Fig. 2 illustrates the use of a computer and a built-in modem (modem card) in accordance with the prior art in the fixed telephone network;
Fig. 3 illustrates the use of a portable computer, a data adapter PCMCIA and phone GSM system in accordance with the prior art in a digital mobile telephone network;
Fig. 4 is a block diagram of the interaction between the modem in accordance with the prior art and the application program in the computer;
Fig. 5 illustrates the operation of the major parts involved in the transfer of data in the computer and the modem in accordance with the prior art;
Fig. 6 illustrates in greater detail the known data transmission equipment according to Fig. 3, when a GSM phone connected to the computer through the data adapter PCMCIA:
Fig. 7a is a block diagram of a known work of the modem or data adapter when transferring data:
Fig. 7b is a block diagram of the operation of the data adapter according to the invention in the transmission of data:
Fig. 7b presents the. g represents a block diagram of the operation of the data adapter according to the invention when the transmission mode of the facsimile;
Fig. 8 illustrates the interaction of the data adapter according to the invention with software and hardware parts of the computer;
Fig. 9 illustrates the flow of transmitted data in the computer using the data adapter according to the invention, when the invention is implemented in the preferred variant.Each piece has similar components use the same numerical designation.The data adapter according to the invention, in essence, represents in relation to the computer controller device, and more precisely, the virtual controller serial port, and it is intended for use in data transmission in a digital mobile phone networks. The specific form of implementation of the data adapter according to the invention to a certain extent depends on, for use with a mobile telephone system he designed. Further, as an example, consider the data adapter that is designed for the GSM system, but for professionals it is obvious that by replacing parts and operations that meet the standards GSM, and operas is relevant to the invention and suitable for transferring data to other mobile phone networks. The data adapter according to the invention contains some data transmission protocols mobile phone network designed to service data. The remainder of the data transmission protocols is a phone and an application program of the computer. The interfaces between the data adapter according to the invention and the rest of the computer is determined in accordance with the standards commonly used in computers, so that the remaining parts of the computer, such as a communication controller that controls data transfer within a computer could work together with the data adapter according to the invention.Next, the structure and operation of the data adapter will be described first with reference to the situation where the user of the terminal wants to transmit digital data over a mobile telephone network to another terminal using, along with digital mobile phone, the application program in the terminal and the data adapter. When describing the characteristics of the present invention, particular attention is paid to design features and operations that distinguish the data adapter according to the present invention from the prior art. The data adapter in accordance with the prior art indicated on fvie data is sent from the application program to the adapter data through a standardized interface call, that usually means that is not shown in the drawing, the microprocessor, which is part of terminal equipment that is managed by an application program writes the words of the commands and data intended for the data adapter for a particular memory address. As was shown above, the circuits corresponding to the prior art, and the modem 1 and 5, and the data adapter 7 are considered terminal as serial ports, such as port 9 COM PC: so call interface is an interface call 19 telecommunication port serial type. The processor of the terminal writes the data to be transferred at a particular address in memory, which is selected so that the data bus of the computer is instructed to physically move data to be processed in the circuit 20 of the processing (Fig. 6) on the modem card or PCMCIA card in the adapter data. According to the scheme proposed by the invention, the processor of the terminal (in the drawing not shown) writes the data under control of the application program, in a register or a memory address from which they can be considered and processed under the control of the adapter 18 data made according to the invention. The transfer of control data between p. it is desirable to implement programmatically. This processor is in itself known, but its use is essential for the present invention, and therefore it will be described later in more detail. Standardized register the interface in this case is the interface 28 for controllers 11, 11a and 18 of the device that is specified by the manufacturer of the program controller interface. The hierarchical structure of computer controllers devices are located below the coherent controller 17.All schemes use a modem and data adapter provide interpreter 21 AT command, which accepts a string of characters received from the application program, and the task of which is to determine whether the character string of the command or data word to be transmitted. This situation is shown in Fig. 7a and 7b, when the user wants to start data transfer from the terminal in a mobile telephone network, the adapter 7, 18 data typically changes from a first application program command ATD123456", which AT points on the team. D is the abbreviation of the word "dial" (set), and 123456 means the phone number of the desired data sink. By submission of this command, data adapter transmits the command to the mod who submits a command to the block 29 management included in the data adapter, where the team goes via the communication controller, the controller port 11a, the real port 9 and the transmitting cable 16 to the mobile phone 6. The form of the command depends on the specifications defined by the manufacturer of the mobile phone. The role of the coherent controller, controller port and a real port in the transmission data will be described next. The form of commands that are required for the mobile phone matches the character string, the detailed structure of which is not significant for the data adapter with the proviso that it is known for the manufacturer of the data adapter, so that he could fulfill the functions required to generate the commands necessary form.After the adapter 7, 18 data gave the command to set the mobile phone 6, he expects a phone message indicating that the telephone set. A message of this type, used some of the parts, to show that the task was completed, hereafter referred OK message. If the telephone connection is all right, the data adapter forwards the OK message from the phone to the application program 8. After this, the application program 8 starts sending the data to be transmitted is giving. It was mentioned earlier that in the variants corresponding to the prior art, data is transferred physically to the subsequent processing circuit 20 modem card or card adapter PCMCIA data, this transfer occurs on the data bus sequentially, one word of data at the speed specified by the tyre. In the scheme according to the invention the data transfer from the application program through a standardized interface 28 to the adapter 18 data made according to the invention, is basically communication between programmable processes running in the computer. Therefore, the speed and the length of the sets of symbols transmitted per cycle depends on the capabilities and the technical implementation of computer processors (not shown) and the load generated by other processes in the computer.The data to be transmitted, which originate from an application program, directed by the adapter 7, 18 data in block 22 of the Protocol data, the structure and operation of which depends on, for use with a mobile telephone system is the data adapter. In this description as an example we consider the data adapter, is the second adapter, Layer 2 Relay function - Function Communication Level 2) and RLP (Radio Link Protocol Radio Contact). The first of them, i.e., LR2 - unit 23 arranges the data to be transmitted in the PDU (Protocol Data Units the Elements of the Protocol Data), consisting, in accordance with the standard 3SM 07.02, octet States. PDU alternately directed in RLP-block 24. Here, in accordance with standard GSM 04.22, the data is converted into RLP frames containing the title for a volume of 16 bits, the data portion of a volume of 200 bits and a sequence control frame with a volume of 24 bits. Full RLP frames are transmitted to the mobile phone 6, the digital signal processor in which (in the drawing not shown) performs channel coding and multiplexing signals for transmission according to the GSM system. In a variant, corresponding to the prior art, transfer to a mobile phone by using controller port and physical port 27 on the modem card or card adapter data, In the circuit according to the invention, this transfer is carried out via the communication controller, the controller 11a port and physical port 9 located in the terminal.After the application program will transfer all the transferable data to the adapter 7, 18 data and phone call can be C the. chain of characters, which is recognized by the data adapter as a team to move out of state transfer back to the command state. After this, the application program issues a data adapter command "ATH", in which the letters AT indicate that this command and H - abbreviation of the term "hang-up" ("hang up"), i.e. to finish. Controller unit 29 in the data adapter transmits this command to the mobile phone, just as it was described earlier in connection with the command select the number, then the phone stops communication.Fig. 9 illustrates the above passage of the transmitted data in the computer 4, which features a data adapter 18 according to the invention. Fig. 9 refers to a preferred variant implementation of the adapter 18 data, i.e., to a fully software implementation of the application program 8, the coherent controller 17 and the controller 11 of the port, and they all belong to the part of the computer software, which in Fig. 9 separated by a dotted line. The connection 16 between the computer 4 and the mobile phone 6 is carried out wirelessly, preferably via infrared channel.The following describes a situation in which the data adapter uses astronauts on the drawing separately, and in fact it is completely analogous to the situation described above the data.Digital signal processor (drawing not shown) in the mobile phone performs channel decoding and removing the seal of a received signal in accordance with the GSM standard, so that the data are in the same form RLP frame in which they left the adapter data transmission device. Frames are transferred to the adapter 18 data block 22 of the Protocol data which frees them from the structure frame. In the data adapter, designed for the GSM system, in which the block 22 of the Protocol data contains subblocks L2R and RLP, RLP-block exempt from the personnel structure sequentially frame by frame and by using a checksum verifies the received frame against defects. If the checksum does not match the other components in the content frame, RLP unit transmits the error message that passes through the transmission line in the opposite direction with respect to the direction of transmission until the data adapter transmitter. The error message contains the information necessary to identify defective accepted frame, and transmitting the data adapter responds in accordance with protocolecho, since the defective frame.After RLP unit 24 determines that it is exempt from the personnel structure RLP frame was received correctly, it sends the element data (PDU), isolated from the frame L2R-6AOK 23, where it is then converted into a form that is understandable to the application program. After this data is passed to the application program 8. In the scheme according to the invention the last operation of the transmission data is again communication between software processes in the computer, so that its implementation depends on the structure and capabilities of the computer processor. In contrast to the prior art, since, according to the known solutions, the data is transmitted from the adapter 7 data to the application program 8 to the data bus terminal from one circuit to another.Sending Fax messages over the digital communication network using a data adapter is slightly different from the above-described data transmission. Therefore, as the transmission and reception of such messages will hereinafter be described in more detail with reference mainly to Fig. 7b and g In the transmission mode Telefax need more AT command than for the above-described transmission mode. Therefore, the adapter 7, 18 data, which is telefacsimile Protocol PC. Additional commands include options, such as resolution of transmitting facsimile number, and an indication of whether to use when transmitting error correction. The GSM 03.45 and 03.46 describe the so-called transparent and opaque framing Fax data, which means non-use and use of error correction, respectively. When using transparent mode, the data transmission mode of the facsimile, is not processed in the above-described L2R - and RLP-blocks, and are only setting speed 26, which corresponds to the output of Fax equipment involved in the transfer. In the case of non-transparent mode, the transferred data are cropping unit data Protocol (L2R 23 and RLP 24) similarly as it was done in transmission mode described above. The application program 8 specifies the choice of transparent or opaque processing by sending in the initial stage of transfer of the appropriate at commands to the adapter 7, 18 data. Practical difference between these two modes of processing is that when the transparent transmission of the transmission delay between transmitting and receiving terminals is constant, but the error rate, i.e. the ratio of the number of the load 5 and the characteristics of the network communications. When opaque transfer error level constant, whereas the delay is variable.The beginning and the end of the call mode of the facsimile is carried out in the same manner as described with respect to data transmission. The feature of the transmission mode of the facsimile is that the application program using AT commands included in the Fax Protocol PC sets associated with the regime of Fax functions that are different from data. As examples, the above choice between transparent and opaque framing. The use of the adapter 18 data according to the invention when the transmission mode of the facsimile differs from the previous level same as that of 51 data transfer, i.e., in accordance with the invention, communication between the application program 8 and the adapter 18 data through the communication controller 17 between program-specific processes in the computer, and data transfer between the adapter 18 data and the mobile phone 6 is similar through the communication controller 17 using conventional serial port 9 of the computer and its controller 11a of the port.The adapter 18 data prozrachnoe cropping), necessary for the transmission mode of the facsimile included in the Protocol data. Instructions for use of these protocols data recorded by the electrical method in the memory of the terminal as part of the data adapter according to the invention.Some aspects of this description relate to the communication controller 17, which in the system provided by the invention, controls the transfer of data between the application program 8 and the adapter 18 data between the adapter 18 and a data controller 11a of the port that controls the physical port. One of the reasons why the production of devices based on the data adapter, similar to the proposed invention, previously impossible, is that in computers data transfer between processor and controller port, managing the physical port, is controlled systems COMM (COMmunication Manager Communication), are included in the operating systems of Windows 3.1, with a very low flexibility. In accordance with the traditional system, the computer has a certain amount of physical ports to transfer data in serial mode from the processor to the modem or data adapter, or other peripheral devices. In PC these ports are called Songling in the computer, set or configured in the installation phase, so that the processor is controlled by an application program 8, it was perceived as a specific serial port, such as COM1. After this attempted any other application, in addition to using the modem or data adapter, refer to this port caused the error condition.In the new operating systems, as example of which is discussed here operating system Microsoft Windows95, applied another communication controller that provides a standardized interface for all devices and processes that are associated with data transmission. In Windows95 this communication controller is called VCOMM. Standardization of the interface 28, this means that the communication controller of a new type, such as VCOMM, contains pre-defined, permitted types of controllers 11 devices, such as controllers printing and serial ports, calls, commands, means to transfer data between the application program and the controller device 11, which correspond to the standard types, for example, with respect to the controller serial port - opening and closing the port, and setting the baud rate.The communication controller (e.g., VCOMM) now controls the data transfer so that when the application program 8 transmits the AT command or word of data intended for transmission, the communication controller sends it to the adapter 18 data made according to the invention. The adapter 18 data, in turn, causes a physical port 9, i.e. when the data adapter wants to send a command or RLP frame to the mobile phone 6, he directs them connected to the controller 17, which sends them forth to the controller 11a of the port that controls physical port 9, and through him, from the physical port 9 and the transmitting cable 16 on the mobile phone 7. When receiving data from the mobile phone 6 is transmitted through the cable 16 and the physical port 9 to the controller 11a of the port, which causes the adapter 18 data according to the present invention, i.e., transmits the data via the communication controller to the adapter 18 data from which they are transmitted via the communication controller to the application program 7. Thanks to the use of the coherent controller tushie in the serial communication type, are defined in the system, since the communication controller in each case provides the data to the appropriate controller port or to another controller device, which can be a real controller port type controller 11a physical serial port or a virtual controller port, similar to the adapter 18 data according to the invention.In the description as an example of a physical connection 16 between the terminal (e.g., a computer) and a mobile phone presented in the form of the transmitting cable. It can be performed as well as an infrared channel or any other form of communication. From the point of view of applicability of the invention it is important that this channel of data was performed using the physical port that meets the standard, for example, the physical port type RS-232, which is already on the computer. In this case, the use of the adapter 18 data according to the invention does not require the installation of additional components in the computer, through which he communicated with peripheral devices such as a mobile phone.The communication controller 17 (for example, VCOMM) - this program, which is part of the operating system (Windows95) computer management is described in a coherent controller when the computer starts (or not registered, until you need). This function is called Plug and Play (Plug-and-Play). After registration of the application program have access to real or virtual communication ports controlled by the controller device. When you create a controller port, such as the adapter 18 data according to the invention, managing virtual communication port, it is created on a standard interface 28 on the lower level in relation to the connected controller 17, and hierarchy levels of the system remains unchanged.A particularly efficient embodiment of the invention is to perform all associated with the invention of the blocks shown in Fig. 7b and 7G by writing commands relevant to their work, in the memory of the computer so you do not need to install into the computer any additional devices or components. From the point of view of operation, these blocks correspond to blocks having the same numerical designation as in the adapter 7 data according to the prior art shown in Fig. 7a and 7b, i.e., they are known to specialists in this field.In addition to traditional applications (communication terminal, data transmission, facsimile, adapter dannyistheone data adapter processes the digital speech signals, coming from the phone, performing the required tasks, such as modification or compression sampling rate. Thereby facilitates the transmission of voice from phone to computer and Vice versa, which, in particular, allows the use of the information terminal as an answering machine without the use of additional electronics.In Fig. 7a - 7G and in this description with reference to the parts and functions of the data adapter according to the invention was used as an example of designation relating to the GSM system. Replacing these parts with similar parts corresponding to other mobile phones, the data adapter according to the invention can be adapted to other systems. For example, the replacement unit 22 of the Protocol data consisting of L2R - and RLP blocks, block Protocol in accordance with the standard WORM-ARQ, it is possible to ensure that the data adapter with Japanese mobile phones. In contrast, the data adapter that corresponds to the American system Fax transmission according to the standard IS136, does not include an extension of the PC-Fax or transparent Fax crop, and only provides compression according to standard V. 42bis and RLP-cropping. This coincides with the transfer to respiraci, in addition to the AT, and all other commands used to control the rate of data flow between the computer and the mobile phone via the communication controller, the controller port, the physical port and the mobile phone to the mobile switching center.As shown in the description, implementation of the data adapter according to the invention does not necessarily require installation in a computer separate electronic devices or components. This avoids the disadvantages of conventional modems and adapters data associated with the differences from the point of view of manufacture and standardization. The data adapter can be installed on any computers, processors, and operating systems which have sufficient efficiency regardless of whether the computer free slots for cards. The solution according to the invention is simple and reliable. The computer at any time can be used to modify any of the settings and can be configured for various applications. The data adapter according to the invention easy to upgrade and develop (in particular, due to the fact that data transmission protocols tend to develop, for example, in relation to media: for this is the R new properties. Cost of production data adapter according to the invention is significantly lower than for conventional modems or adapters. 1. A method of transferring data between the information terminal (4) and connected to an external device (6), and the information terminal includes communication controller (17), which manages the transfer of data within the terminal, and at least one communication port (9) and the controller (11) port, managing them when transferring data between the information terminal (4) and an external device (6), and the transmitted data is processed by an application program (8) and are routed through the controller (11) port and a communication port (9), characterized in that what a predefined modification of transmitted data from the form in which they were processed by an application program (8), in the form of perceived external device (6), is carried out in the controller device, installed in the information terminal (4), and a device controller for providing transmission handles communication with the specified application program (8) via the communication controller (17) and a controller (11) port via the communication controller (17).2. The method according to p. 1, wherein tellaro device, convert the controller device in the form of perceived external device (6), and sent via the communication controller (17) to the controller (11) port for transmission to an external device.3. The method according to p. 1, characterized in that the transmitted data are transmitted from an external device (6) to the controller (11) port, send out via the communication controller (17) to the controller device, is converted into a readable form, an application program (8) and sent via the communication controller (17) to an application program (8).4. The method according to any of paragraphs.1 to 3, characterized in that the system for its implementation record in electrical form in the memory of the information terminal.5. The method according to any of paragraphs.1 to 4, characterized in that the application program controls the operation of the controller device, feeding on him at commands.6. The method according to any of paragraphs.1 to 5, characterized in that the controller device when converting transmitted data uses the schema of the crop according to the standards of GSM 07.02 and 04.22.7. The method according to any of paragraphs.1 to 5, characterized in that the controller device when converting transmitted data uses the schema of the crop according to the standards of the transmitted data uses the schema of the crop according to the communication standard IS-136.9. The method according to any of paragraphs.1 to 5, characterized in that the controller device when converting transmitted data uses the schema of the crop according to the communication standard IS 95.10. Information terminal, managed by an application program that processes data to be transmitted, is connected with an external device (6) which includes a communication controller (17), which manages the transfer of data within the terminal, and at least one communication port (9) and the controller (11) port Manager port for data transmission between the information terminal (4) and an external device (6), characterized in that the processing of the transferred data it contains a device controller, which is connected with a communication controller for transmitting data between the controller device and the application program (8) and between the controller device and the controller (11) port.11. Information terminal according to p. 10, wherein the controller device includes interpreting part (21) for the interpretation of incoming commands and means (22) for modifying the data from the form to be processed by an application program (8), in a form that is processed by an external device (6), and Vice versa.12. Information is ATI information terminal (4).13. Information terminal according to any one of paragraphs.10 to 12, characterized in that it uses the Microsoft Windows operating system 95, and the communication controller (17) is connected to the controller VCOMM, which belongs to the operating system.14. Information terminal according to any one of paragraphs.10 to 13, characterized in that the communication port is a serial port, the corresponding standard RS-232.15. Information terminal according to any one of paragraphs.10 to 12, characterized in that the communication port is an infrared communication channel.16. A device controller for processing the transmitted data that are passed between the application program (8), the management information of the terminal (4), and an external device (6) connected with the information terminal, containing the communication controller (17), managing the transfer of data within the terminal, and at least one communication port (9) and the controller (11) port Manager port for data transmission between the information terminal (4) and an external device (6), characterized in that the controller device is adapted for communication with the communication controller to perform data transfer between the controller device and prikladnoi on p. 16, characterized in that it contains interpreting part (21) for the interpretation of incoming commands and means (22) for modifying the data from the form to be processed by an application program (8), in a form that is processed by an external device (6) and back.18. The controller device according to p. 16, characterized in that it is recorded in electric form in the memory of the information terminal (4).
FIELD: communication systems using variable transfer process; optimizing modulation process and code repetition frequency in given hardware environment.
SUBSTANCE: in order to find most effective modulation and code repetition frequency process including code correction according to this criterion, communication system transmitter is provided with code packet coder and certain set of modulators having different modulation orders and modulating sub-packets that function as code words outputted from coder. Selector functions to select one of modulators by comparing product of modulation order by code repetition frequency which is, essentially, relationship between code packet size and number of information modulating characters and by comparing product of modulation order by code repetition frequency with threshold value.
EFFECT: enhanced effectiveness of found process.
29 cl, 6 dwg, 1 tbl
FIELD: radio engineering.
SUBSTANCE: demodulation device for octic phase-keyed signals receives input signal Rk(Xk, Yk) incorporating k quadrature component Yk and k cophasal component Xk and functions to generate L(sk, 0), L(sk, 1, and L(sk, 2) relaxed-solution values. Computer functions to calculate Zk by subtracting |Yk| level of quadrature signal component Yk from |Xk| level of cophasal signal component Xk. First selector chooses Zk for respective most significant bit of quadrature signal component Yk. Second selector chooses Zk for respective most significant bit of cophasal signal component Xk. Third selector is used to select output signal of second selector or "0" for respective most significant bit in Zk.
EFFECT: facilitated processing required in calculating minimal distance from signal received.
4 cl, 5 dwg
FIELD: radio communications; digital communication systems.
SUBSTANCE: proposed spectrum-division frequency modulator that incorporates provision for using frequency-modulated signals of high modulation index in communication systems where frequency resources are limited has two multipliers, two phase shifters, smoothing-voltage generator, two amplitude-phase modulators, carrier generator, adder, and frequency shift control unit.
EFFECT: enhanced noise immunity of communication systems.
3 cl, 15 dwg
FIELD: radio engineering.
SUBSTANCE: first calculator calculates soft value Λ of third demodulated symbol of 4 demodulated symbols by subtraction of distance 2a between two demodulated symbols of same axis of indication table from level , quadrature component Yk. Second calculator determines soft value Λ of fourth demodulated symbol by calculating using first variable α. Third calculator calculates soft value Λ of first demodulated signal by subtraction of distance 2a from level of common-mode component Xk. Fourth calculator determines soft value Λ of second demodulated symbol by calculating using second variable β.
EFFECT: higher efficiency.
5 cl, 14 dwg, 12 tbl
FIELD: radio engineering, possible use during coherent demodulation of signals with combined amplitude-phase manipulation.
SUBSTANCE: prototype device includes second memorizing device and logarithm computation block, while outputs of first and second analog-digital converters are connected, respectively, to first and second inputs of second memorizing device, output of which is connected to input of logarithm computation block, output of which is connected to second input of multiplier.
EFFECT: increased resistance of interference due to removal of false clamp point by phase on discriminatory characteristic.
FIELD: signals transmission equipment engineering.
SUBSTANCE: use of given method in systems for transmitting and receiving signals of quadrature amplitude modulation with low bearing frequency synchronization threshold makes it possible to decrease demodulation threshold due to provision of low synchronization threshold by bearing frequency. Result is achieved by adding to pack of M m-level quadrature amplitude modulation symbols of previously given symbols, part of which does not change from pack to pack, and another part is periodically inverted in some of packs. Due to that at receiving side components of quadrature amplitude modulation signals are singled out, appropriate for additional previously given symbols (frequency of which are known). On basis of these components, inversion frequency is determined, which provides for removal of ambiguousness in adjustment of receipt synchronization frequency, thus making it possible to approach Shannon threshold closely.
EFFECT: decreased demodulation threshold.
4 cl, 1 tbl, 9 dwg
FIELD: radio engineering; demodulation of sixteen-position quadrature amplitude keyed signals.
SUBSTANCE: newly introduced in prior-art sixteen-position quadrature amplitude keyed (KAM-16) signal demodulator are fifth and sixths counters and phase error correction unit; there units make it possible to execute following new operations with signal: counting of signal points within count interval, their quantity enabling evaluation of phase error due to unwanted lock-on; correction of calculated phase error in phase error correction unit.
EFFECT: enlarged functional capabilities.
2 cl, 5 dwg, 1 tbl
FIELD: information technology.
SUBSTANCE: present invention relates to methods of detecting hierarchically encoded data. In one detection scheme, log-likelihood ratio (LLR) is derived for code bits of the first data stream, based on received data symbols. Interference caused by the first data stream is evaluated. LLR is derived for code bits of the second data stream, based on the LLR for code bits of the first data stream and evaluated interference. LLR for code bits of the first data stream is decoded to obtain decoded data from the first data stream. Decoded data are recoded and re-modulated to obtain re-modulated symbols. Interference caused by the first data stream is evaluated based on the re-modulated symbols. LLR for the first data stream can be derived from received symbols in real time without buffering the received symbols. LLR for the second data stream can be derived after decoding the first data stream.
EFFECT: more efficient detection of hierarchically encoded data.
34 cl, 6 dwg
SUBSTANCE: method of relaxed solution for demodulating a received signal α+iβ with quadrature amplitude modulation (QAM) involves deriving several values of a conditional probability vector, where each is a relaxed solution value which corresponds to the position of a stiff solution bit, using a function which includes an operation for conditional definition from the quadrature phase component and inphase component of the received signal. The method of solving for the conditional probability vector for demodulation of the first half of the complete number of bits is identical to the solution method for demodulating the remaining half of bits, and is determined by replacing the value of the quadrature phase component and the value of the inphase component with each other.
EFFECT: more accurate processing a received signal.
29 cl, 15 dwg
FIELD: information technologies.
SUBSTANCE: method is realised using the following facilities, where a DVB-T modulator comprises serially joined units, an interface, a randomiser, a Reed-Solomon encoder, a convolution interleaver, a convolution coder, a bit interleaver, a symbol interleaver, a QAM shaper, a calculator of reverse quick Fourier transform (RQFT calculator), a digital to analogue converter (DAC), a high-frequency unit (HF unit) and a shaper of pilot signals at the inlet of the QAM shaper, and also the following units are additionally introduced: a unit of packets breakdown, receiving information from the interface and sending it to the randomiser and a control unit, a register receiving signals from the randomiser and sending a signal to the Reed-Solomon coder and the convolution interleaver, the control unit receiving information from the unit of packets breakdown, and outlets are connected to all modulator units.
EFFECT: reduced requirements to a computing device due to optimisation of processes of synchronising operation of all units in whole, using less efficient computing devices.