JP2005269465A - Address generation method, address generation circuit, communication packet, and communication protocol - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an address configuration method and a communication protocol enabling communication by promptly searching a terminal having a desired application in a network. <P>SOLUTION: A transmission source address and a transmission destination address are structured of a network ID 15 indicating a terminal group in the communication network, a terminal ID 16 indicating a terminal, a service ID 17 indicating a function owned by the terminal, and a performance ID indicating performance of the function owned by the terminal. With this, it becomes possible to search the desired application promptly and perform communication. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an address generation method, an address generation circuit, a communication packet using an address generated by the address generation method, and a communication protocol in a communication network.

  The conventional network address is configured by indicating the physical position of the terminal on the network. For example, in TCP / IP, which is a standard protocol on the Internet, a 32-bit address is composed of a network address part and a host address part, and the network address part indicates a node to a terminal on the network. Yes.

  However, in such an address configuration, in order to recognize the attributes of each terminal on the network, for example, QoS (Quality Assurance Service) necessary for connection, the original main information of each terminal, that is, the physical information of the terminal It was necessary to transfer the signaling packet separately from the line for transferring the position information.

As a solution to this, for example, as shown in FIG. 10, the packet transmitted from the user includes a source address that is the source address of the transmission source and a destination address that is the address of the other party (transmission destination). A multi-dimensional address is used for the Source Address and the Destination Address, and each of the Source Address and the Destination Address includes a user attribute as an individual component of the user multi-dimensional address. Is divided into a plurality of components, and systematized by a physical position, a logical position, and an attribute component, and is configured to enable packet transfer corresponding to individual users. (See Patent Document 1)
Japanese Patent Laid-Open No. 11-112571

  However, in the conventional address configuration described above, the location of the terminal in the network is explicitly indicated at each of the Source Address and Destination Address, and the terminal has a function and performance. It did not indicate whether there was.

  For this reason, in the conventional communication protocol, when generating an address, a protocol for searching for a terminal on the network and a protocol for communicating with the searched terminal are used, and a network using these protocols is used. After exchanging information with each terminal above and recognizing the function of each terminal, the application is executed through the network. That is, in order to execute an application by communication with a desired terminal on the network with the conventional address configuration, it is necessary to include many communication protocols in the address.

  The present invention solves the above-described conventional problems, and an address that allows a terminal having a desired application in a network to be quickly searched and communicated without having many communication protocols in the address. It is an object to provide a generation method, an address generation circuit, a communication packet, and a communication protocol.

In order to solve the above-described conventional problems, an address generation method according to the present invention is an address generation method for generating an address included in a communication packet transmitted and received between terminals in each terminal of a communication network exchanging data between a plurality of terminals A generation method for generating a terminal ID indicating the terminal, assigning a function code to at least one function of the terminal, and using the function code, one service ID indicating all of the functions of the terminal And the terminal ID and the service ID are combined to generate one terminal address.
As a result, a function code can be included in the address, and at least one function of each terminal can be determined by the address. As a result, an application by communication can be executed with a small number of communication protocols.

The address generation method of the present invention assigns a performance code for each performance of at least one function of the terminal, and generates one performance ID indicating all the performance of the function of the terminal using the performance code. The terminal ID, the service ID, and the performance ID are combined to generate one terminal address.
As a result, it is possible to include a function code and a performance code in the address, and at least one function and performance of each terminal can be determined by the address. Can be executed.

The address generation method of the present invention creates a network ID indicating a terminal group of the communication network, and generates one terminal address by combining the terminal ID, the service ID, and the network ID.
As a result, the network to which the terminal belongs and the function code can be included in the address, and at least one function and performance of each terminal can be determined by the address. As a result, communication can be performed with a minimum number of protocols. The application by can be executed.

The address generation method of the present invention generates a network ID indicating a terminal group of the communication network, and generates one terminal address by combining the terminal ID, the service ID, the performance ID, and the network ID. Is.
As a result, the network to which the terminal belongs, the function code, and the performance code can be included in the address, and at least one function and performance of each terminal can be determined by the address. A communication application can be executed by the protocol.

In the address generation method of the present invention, the service ID is generated by combining the function codes.
Thereby, even if the terminal has a plurality of functions, the plurality of functions can be accurately displayed at the address.

In the address generation method of the present invention, the performance ID is generated by combining the performance codes.
As a result, even if the terminal has a plurality of functions, the plurality of functions can be accurately displayed at the address.

In the address generation method of the present invention, the service ID is generated by selecting from a correspondence table indicating all combinations of the function codes.
Thereby, even if the terminal has a plurality of functions, the plurality of functions can be accurately displayed at the address.

In the address generation method of the present invention, the performance ID is selected and generated from a correspondence table indicating all combinations of the performance codes.
As a result, even if the terminal has a plurality of functions, the plurality of functions can be accurately displayed at the address.

In the address generation method of the present invention, the service ID is generated by configuring the function code as a prime number and multiplying the prime number.
As a result, even if the terminal has a plurality of functions, the plurality of functions can be displayed accurately and in a short address.

In the address generation method of the present invention, the performance ID is generated by configuring the performance code as a prime number and multiplying the prime number.
Thus, even if the terminal has a plurality of function performances, the plurality of performances can be accurately and shortly displayed at the address.

The address generation circuit of the present invention is an address generation circuit that generates an address included in a communication packet transmitted and received between the terminals included in each terminal in a communication network for exchanging data between a plurality of terminals, A terminal ID generation unit that generates a terminal ID indicating a terminal; and a function code register that holds a function code assigned to at least one function of the terminal, and the terminal has the function code using the function code A service ID generation unit that generates one service ID indicating all functions, and a synthesis unit that generates one terminal address by combining the terminal ID and the service ID are provided.
As a result, a function code can be included in the address, and at least one function of each terminal can be determined by the address. As a result, an application by communication can be executed with a small protocol.

The address generation circuit of the present invention further includes a performance code register that holds a performance code assigned to the performance of at least one function of the terminal, and the function of the terminal using the performance code. A performance ID generation unit that generates one performance ID indicating all of the performance of the device, and the combining unit generates one terminal address by combining the terminal ID, the service ID, and the performance ID. .
As a result, it is possible to include a function code and a performance code in the address, and at least one function and performance of each terminal can be determined by the address. Can be executed.

The address generation circuit of the present invention includes a network ID generation unit that generates a network ID indicating a terminal group of the communication network, and the combining unit combines the terminal ID, the service ID, and the network ID. One terminal address is generated.
As a result, the network to which the terminal belongs, the function code, and the performance code can be included in the address, and at least one function and performance of each terminal can be determined by the address. A communication application can be executed by the protocol.

A communication packet according to the present invention includes an address generated by the address generation method according to any one of claims 1 to 10, a transmission source address that is an address of a transmission terminal, and a transmission destination address that is an address of a reception terminal It is intended to be used as
Thereby, in a communication network for exchanging data between a plurality of terminals, it becomes possible to include the function and performance of each terminal in the transmission source address and transmission destination address included in the communication packet transmitted and received between the terminals. It is possible to determine at least one function and performance possessed by the address, and as a result, it is possible to execute an application by communication with a minimum number of protocols.

  The communication protocol of the present invention comprises a control unit indicating status information necessary for communication in a communication network for exchanging data between a plurality of terminals, and a payload unit for storing the data, and is included in the control unit In the communication protocol in which the address portion transmits and receives a communication packet composed of a transmission source address that is a terminal address of the transmission terminal and a transmission destination address that is a terminal address of the reception terminal, the transmission source address and the transmission destination address Is a function of the terminal generated using a network ID indicating a terminal group of the communication network, a terminal ID indicating the terminal, and a function code assigned to each of at least one function of the terminal. One service ID indicating all of the above, and at least one device possessed by the terminal And a performance ID indicating all of the performance of the terminal generated using the performance code assigned to each of the performances of the plurality of performances, wherein the transmitting terminal includes the plurality of performance IDs When searching for a receiving terminal capable of exchanging data with the transmitting terminal among the terminals, the network ID constituting the transmission source address is set to indicate a group to which the transmitting terminal belongs, and the terminal ID is Indicating the transmitting terminal in the group, the service ID indicating all of at least one function executed by the transmitting terminal, and the performance ID indicating the performance of at least one function executed by the transmitting terminal. And the network ID constituting the transmission destination address is assigned to the group to which the transmission terminal belongs. , The terminal ID indicates all terminals in the group, the service ID indicates all of at least one function executed by the receiving terminal, and the performance ID is received. Each of the receiving terminals receiving the communication packet from the transmitting terminal indicates the performance of at least one function executed by the terminal, and the network ID, the terminal ID, and the service ID constituting the transmission destination address. And the performance ID is detected, and the detected network ID indicates a group to which the receiving terminal belongs, and the detected terminal ID includes a terminal ID indicating the receiving terminal, and The detected service ID includes at least one function code of the receiving terminal, and the detected service ID A response is made to the transmitting terminal only when the performance ID includes at least one performance code of the receiving terminal, and no response is made to the transmitting terminal otherwise. .

  As a result, in a communication network in which data is exchanged between a plurality of terminals, the function and performance of the terminal indicated by the address can be included in the transmission destination address and the transmission source address included in the communication packet transmitted and received between the terminals. Thus, a terminal having a desired function can be quickly searched from terminals in the network. As a result, an application by communication can be easily executed with a minimum number of protocols.

  Further, the communication protocol of the present invention is such that the transmitting terminal that has transmitted the communication packet responds to the transmitting terminal with respect to one receiving terminal having a desired function and performance among the receiving terminals. , The network ID constituting the transmission source address indicates the group to which the transmission terminal belongs, the terminal ID indicates the transmission terminal, and the service ID is the transmission terminal. Indicating all of at least one function executed by the transmission terminal, the performance ID indicating all of the performance of at least one function executed by the transmission terminal, and the network ID constituting the destination address Indicating the group to which the transmitting terminal belongs, the terminal ID indicating the receiving terminal, and the service D indicates all of at least one function executed by the receiving terminal, and the performance ID indicates all performance of at least one function executed by the receiving terminal. Each receiving terminal that receives the packet detects the network ID, the terminal ID, the service ID, and the performance ID constituting the transmission destination address, and the detected network ID belongs to the group to which the receiving terminal belongs. The terminal ID indicating the receiving terminal is included in the detected terminal ID, and at least one function code of the receiving terminal is included in the detected service ID. Only when the performance ID includes at least one performance code of the receiving terminal Processing the data of the payload portion of the communication packet, otherwise, those that do not process the data of the payload portion.

  As a result, among the receiving terminals that have responded to the transmitting terminal, one receiving terminal having a desired function and performance is quickly detected, and a minimum protocol is used for the detected receiving terminal. Thus, the application can be easily executed by communication.

  Further, the communication protocol of the present invention is such that when the transmitting terminal that has transmitted the communication packet broadcasts the data to the plurality of receiving terminals, the network ID constituting the source address is Indicating a group to which the transmitting terminal belongs, the terminal ID indicating the transmitting terminal, the service ID indicating all of at least one function executed by the transmitting terminal, and the performance ID, It indicates all of the performance of at least one function executed by the transmitting terminal, and the network ID constituting the transmission destination address indicates a group to which the transmitting terminal belongs, and the terminal ID is At least one function for indicating all terminals in the group and executing the service ID by the receiving terminal All the performance IDs indicate all performances of at least one function executed by the receiving terminal, and each receiving terminal receiving the communication packet from the transmitting terminal sets the destination address. The network ID, the terminal ID, the service ID, and the performance ID to be configured are detected, and the detected network ID is a group to which the receiving terminal belongs, and the receiving terminal is assigned to the detected terminal ID. And the function code indicated by the detected service ID includes at least one function code of the reception terminal, and the reception terminal includes the performance code indicated by the detected performance ID. Only if it contains at least one performance code Processing the data in the payload section, otherwise, those that do not process the data of the payload portion.

  As a result, when performing broadcast communication to all terminals on the network, it is possible to quickly detect a receiving terminal that can receive and process data, and to minimize the detected receiving terminal. With the protocol, the application can be easily executed by communication.

  According to the address generation method, the address generation circuit, the communication packet, and the communication protocol of the present invention, it is possible to quickly search for a terminal having a desired function from the terminals in the network and communicate with each other. Can be easily implemented.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(Embodiment 1)
First, the configuration of the communication packet 100 according to the first embodiment will be described with reference to FIGS. 1 and 2.

  FIG. 1 is a diagram showing a configuration of a communication packet according to the first embodiment of the present invention. In FIG. 1, in order to indicate the bit length of each block of the communication packet, it is described in units of 32 bits.

  A communication packet 100 according to the first embodiment includes a header part 1 for storing packet status information, a payload part 2 for storing data, and an FCS (Frame Check Sequence) 3 for detecting packet errors. Has been.

  The header part 1 further indicates Ver5 indicating the protocol version, Type 6 indicating the packet contents, the header length 7 indicating the length of the header part 1 in bytes, and the length of the payload part 2 in bytes. Payload length 8, if the packet is fragmented, flag ID 9 indicating a fragmentation group, flag bit 10 indicating whether the packet is fragmented by fragmentation, and flag sequence 11 indicating the order of the packets divided by the fragmentation And an address section 4 including a transmission source address 12 indicating a terminal that has transmitted a packet, a transmission destination address 13 indicating a terminal that receives the packet, and an option 14.

Here, the detailed configuration of the address unit 4 will be described with reference to FIG.
FIG. 2 is a diagram showing a configuration of the address section. In FIG. 2 also, in order to indicate the bit length of each block of the address section 4, it is described in units of 32 bits.

  As shown in FIG. 2, the source address 12 and the destination address 13 according to the first embodiment are the network IDs 15a and 15b indicating the same group among the terminals on the network, and the group having the same network ID. Terminal IDs 16a and 16b indicating the terminals in the network, service IDs 17a and 17b indicating the functions of the terminals, and performance IDs 18a and 18b indicating the performance of the functions of the terminals. Yes. Each ID described above can be arbitrarily determined within each terminal.

  Here, it is assumed that the network IDs 15a and 15b and the terminal IDs 16a and 16b each have an 8-bit area, and the service IDs 17a and 17b and the performance IDs 18a and 18b each have a 16-bit area.

An example of a specific network configuration is shown below.
FIG. 3 is a wireless network showing a preferred application example of the present invention.

  The first camera 30 is a moving image camera having a wireless communication function, the terminal ID is 01HEX (hereinafter, the display in hexadecimal number is indicated by “HEX”), and the video and audio are compressed by the MPEG2 system as data. It has a function to transmit. The second camera 31 is a still image camera having a wireless communication function, the terminal ID is 02HEX, and has a function of compressing a captured video as a still image in the JPEG format and transmitting it as data. The first monitor 32 is a monitor having a wireless communication function, the terminal ID is 03HEX, the data compressed by the MPEG2 system is decoded, the decoded video signal and audio signal are reproduced, and the video signal is It has a function of displaying a moving image on a monitor and outputting the audio signal from a speaker. The speaker 33 is a speaker having a wireless communication function, the terminal ID is 04HEX, and has a function of decoding data compressed by the MPEG2 system and reproducing an audio signal. The second monitor 34 is a monitor having a wireless communication function. The terminal ID is 05HEX. The second monitor 34 has a function of reproducing data by decoding data compressed by the JPEG method and displaying a still image on the monitor. The recording device 35 is a data recording device having a wireless communication function, the terminal ID is 06HEX, and has a function of recording and reproducing data compressed by the MPEG1 and MPEG2 systems. The network ID of this network is 01HEX.

Here, an address generation circuit for generating an address provided in each terminal on the wireless network as described above will be described with reference to FIGS.
FIG. 4 is a diagram illustrating a configuration of an address generation circuit included in each terminal according to the first embodiment. FIG. 5A illustrates a function code register included in the service ID generation unit according to the first embodiment. FIG. 5B is a diagram illustrating an example, and FIG. 5B is a diagram illustrating an example of a performance code register included in the performance ID generation unit according to the first embodiment.

  As shown in FIG. 4, the address generation circuit 40 generates and outputs a service ID from a network ID generation unit 41 that outputs a network ID, a terminal ID generation unit 42 that outputs a terminal ID, and a function code register 44. A service ID generation unit 43, a performance ID generation unit 45 that generates and outputs a performance ID from the performance code register 46, and a synthesis unit 47 that outputs an address by combining the IDs output from the above-described generation units. Become. The address generation circuit 40 generates an address part 4 in the communication packet 100, that is, a transmission source address and a transmission destination address.

  Here, the generation method of the service ID 17 in the service ID generation unit 43 in the address generation circuit 40 and the generation method of the performance ID 18 in the performance ID generation unit 45 will be described with reference to FIG. As shown in FIG. 5 (a), function codes are assigned and stored in advance in the function code register 44 for all functions of each terminal, and the terminal serving as the transmission station determines the source address. In this case, the function of at least one service to be executed by the terminal is generated using the function code held in the function code register 44. For example, when the service executed by the terminal is video output and audio output, the service ID is multiplied by the video output code: 02 and the audio output code: 03 to generate a service ID: 0006HEX. To do.

  In addition, as shown in FIG. 5B, the performance IDs 18a and 18b are assigned in advance to the performance code register 46 with respect to the performance of all the functions provided in each terminal, and are stored. The performance corresponding to the function to be executed by the terminal itself is generated using the performance code held in the performance code register 46. For example, when the video output and audio output, which are services executed by the terminal itself, are output of data compressed by MPEG2, the performance ID: 0002HEX is generated from the code 02 of MPGE2.

  In this way, by making each code held in each register 44, 46 a prime number and multiplying a plurality of codes, one service ID indicating all the functions provided in each terminal, or the function provided in each terminal It is possible to generate one performance ID that indicates all of the performances.

  The method for generating the service ID or performance ID is not limited to the above-described method. For example, a method for generating a single ID by arranging a plurality of codes, or a table in which a plurality of codes are combined in advance is created. Even if the method is selected from the table, the same effect as described above can be obtained.

  Next, a communication protocol for transmitting data between terminals on the network will be described with reference to FIGS.

  First, a communication protocol for searching for a terminal having a desired function and performance from terminals on a network and transmitting data between the terminals will be described with reference to FIGS. Here, a description will be given by taking as an example the case where the first camera 30 in FIG. 3 searches for a terminal having a video and audio input function from the network and communicates.

  FIG. 6 (a) is a diagram showing a flow of communication packets between the terminals according to the first embodiment, and FIG. 6 (b) is a source address of each communication packet shown in FIG. 6 (a). FIG. 7 is a flowchart showing a series of flows when data is transmitted between the terminal and the terminal according to the first embodiment.

  First, the first camera 30 which is a transmission terminal has an Internet ID, a terminal ID of the own terminal, an image which is a function of the own terminal, an audio output function and MPEG2 which is a performance thereof, a terminal ID, a service ID and a performance ID. As the source address S1, on the other hand, the ID for selecting all the terminals on the network, and the image, voice input function and MPEG2 as its performance as the functions to be executed by other terminals, the terminal ID and the service ID The connection request packet 60 including the transmission destination address D1 as the performance ID is sent to all terminals (step s71).

  The source address S1 and destination address D1 at this time are shown in FIG. In the transmission source address S1, the network ID is “01HEX”, the terminal ID is “01HEX”, and the service ID detects the video output “02” and the audio output “03” from the function code register 44 of FIG. “0006HEX” is generated, and MPEG2 “02” is detected as the performance ID from the performance code register 46 in FIG. 4 to generate “0002HEX”.

  On the other hand, in the transmission destination address D1, the network ID is set to “01HEX” and the terminal ID is set to “FFHEX”. This “FFHEX” indicates broadcast. Then, the service ID detects the video input “05” and the audio input “07” from the function code register 44 in FIG. 4 to generate “0023HEX”, and the performance ID from the performance code register 46 in FIG. , MPEG2 “02” is detected and “0002HEX” is generated.

  All the terminals 31 to 35 on the network that have received the connection request packet 60 recognize the function and performance required by the first camera 30 from the transmission destination address D1 (steps s72 to s76). Then, the first monitor 32 whose function and performance are compatible with the function and performance possessed by the terminal sends the response packet 61, the speaker 33 sends the response packet 62, and the recorder 35 sends the response packet 63 (step s77). The terminal, the second camera 31, and the second monitor 34 do not respond to the first camera 30 (step s78).

The source address and destination address output from each terminal at this time are shown in FIG.
As shown in FIG. 6B, the source address S2 of the response packet 65 of the first monitor 32 has the network ID “01HEX” and the terminal ID “03HEX”, and the service ID is the function shown in FIG. Image input “05”, audio input “07”, and display “13” are detected from code register 44 to generate “01C7HEX”, and performance ID is MPEG2 “02” detected from performance code register 46 of FIG. Then, “0002HEX” is generated. On the other hand, the transmission destination address D2 has the same content as the transmission source address S1 included in the connection request packet 60 from the first camera 30.

  Further, as shown in FIG. 6B, the transmission source address S3 of the response packet 62 of the speaker 33 is the network ID “01HEX”, the terminal ID “04HEX”, and the service ID is the function code of FIG. The audio input “07” and display “13” are detected from the register 44 to generate “005BHEX”, and the performance ID detects MPEG2 “02” from the performance code register 46 in FIG. 4 and sets “0002HEX”. Generate. On the other hand, the transmission destination address D3 has the same content as the transmission source address S1 included in the connection request packet 60 from the first camera 30.

  Further, as shown in FIG. 6B, the transmission source address S4 of the response packet 63 of the recorder 35 has the network ID “01HEX” and the terminal ID “06HEX”, and the service ID is the function shown in FIG. The video input “05”, audio input “07”, and recording “11” are detected from the code register 44 to generate “0181HEX”, and the performance ID is MPEG2 “02” detected from the performance code register 46 of FIG. Thus, “0002HEX” is generated. On the other hand, the transmission destination address D4 has the same content as the transmission source address S1 included in the connection request packet 60 from the first camera 30.

  The first camera 30 that has received these response packets 61 to 63 selects the first monitor 32 having the video and audio input functions as the service ID and the performance ID of MPEG2 (step s79). An image and audio data packet 64 is transmitted to one monitor 32 (step s80).

  As shown in FIG. 6B, the transmission source address S5 of the image / sound data packet 64 has the same contents as the transmission source address S1 in order to represent the function and performance of the first camera 30, In the transmission destination address D5, the network ID is “01HEX”, the terminal ID is the terminal address “03HEX” of the first monitor 32, and the service ID is the image input “05” and the voice input “07” from the function code register 44 of FIG. "01" is detected to generate "01C7HEX", and the performance ID detects MPEG2 "02" from the performance code register 46 of FIG. 4 to generate "0002HEX".

  The first monitor 32 that has received the image and audio data packet 64 transmits a response packet 65 to notify the completion of reception (steps s81 to s82). As shown in FIG. 6B, the source address S6 of the response packet 65 at this time has the same contents as the source address S2, and the destination address D6 has the same contents as the source address D2.

  As described above, the first camera 30 and the first monitor 32 transmit and receive data. The first monitor 32 performs the image and audio data according to the contents of the service ID and performance ID included in the transmission destination address D5. The data in the payload portion of the packet 64 is restored to an image and audio signal in the MPEG2 format and displayed (step s83).

  Next, a communication protocol for searching for terminals having image and voice input functions on the network and broadcasting data to these terminals will be described with reference to FIGS. Here, a description will be given by taking as an example the case where the first camera 30 in FIG. 3 searches all terminals having video and audio input functions from the network and performs broadcast communication.

  FIG. 8A is a diagram illustrating a flow of communication packets when performing broadcast communication to a plurality of terminals in the first embodiment, and FIG. 8B is a diagram illustrating each communication illustrated in FIG. FIG. 9 is a diagram illustrating a transmission source address and a transmission destination address of a packet. FIG. 9 is a flowchart illustrating a series of flows when data is transmitted by broadcast communication in the first embodiment.

  First, the first camera 30 that is a transmission terminal has its own terminal's Internet ID, terminal ID, and image / audio output function as its function, and MPEG2 as its performance, terminal ID, service ID, and performance ID. As the source address S1, on the other hand, the ID for selecting all the terminals on the network, and the image, voice input function and MPEG2 as its performance as the functions to be executed by other terminals, the terminal ID and the service ID The connection request packet 80 including the transmission destination address D1 as the performance ID is sent to all terminals (step s91).

  The source address S1 and destination address D1 at this time are shown in FIG. In the transmission source address S1, the network ID is “01HEX”, the terminal ID is “01HEX”, and the service ID detects the video output “02” and the audio output “03” from the function code register 44 of FIG. “0006HEX” is generated, and MPEG2 “02” is detected as the performance ID from the performance code register 46 in FIG. 4 to generate “0002HEX”.

  On the other hand, in the transmission destination address D1, the network ID is set to “01HEX” and the terminal ID is set to “FFHEX”. This “FFHEX” indicates broadcast. Then, the service ID detects the video input “05” and the audio input “07” from the function code register 44 in FIG. 4 to generate “0023HEX”, and the performance ID from the performance code register 46 in FIG. , MPEG2 “02” is detected and “0002HEX” is generated.

  The terminals 31 to 35 on the network that have received the connection request packet 80 recognize the function and performance required by the first camera 30 based on the transmission destination address D1 (steps s92 to s96). Then, the first monitor 32 whose function and performance are compatible with the function and performance possessed by the own terminal sends the response packet 81, the speaker 33 sends the response packet 82, the recorder 35 sends the response packet 83 (step s97), and others , The second camera 31, and the second monitor 34 do not respond to the first camera 30 (step s98).

The source address and destination address output from each terminal at this time are shown in FIG.
As shown in FIG. 8B, the source address S2 of the response packet 81 of the first monitor 32 is the network ID “01HEX”, the terminal ID “03HEX”, and the service ID is the function shown in FIG. Image input “05”, audio input “07”, and display “13” are detected from code register 44 to generate “01C7HEX”, and performance ID is MPEG2 “02” detected from performance code register 46 of FIG. Then, “0002HEX” is generated. On the other hand, the transmission destination address D2 has the same content as the transmission source address S1 included in the connection request packet 80 from the first camera 30.

  Further, as shown in FIG. 8B, the source address S3 of the response packet 82 of the speaker 33 is the network ID “01HEX”, the terminal ID “04HEX”, and the service ID is the function code of FIG. The audio input “07” and display “13” are detected from the register 44 to generate “005BHEX”, and the performance ID detects MPEG2 “02” from the performance code register 46 in FIG. 4 and sets “0002HEX”. Generate. On the other hand, the content is the same as the source address S1 included in the connection request packet 80 from the first camera 30.

  Furthermore, the source address S4 of the response packet 83 of the recorder 35 is, as shown in FIG. 8B, the network ID is “01HEX”, the terminal ID is “06HEX”, and the service ID is the function shown in FIG. The video input “05”, audio input “07”, and recording “11” are detected from the code register 44 to generate “0181HEX”, and the performance ID is MPEG2 “02” detected from the performance code register 46 of FIG. Thus, “0002HEX” is generated. On the other hand, the transmission destination address D4 has the same content as the transmission source address S1 included in the connection request packet 80 from the first camera 30.

  The first camera 30 that has received these response packets 81 to 83 has a video / audio input function as a service ID, a first monitor 32 having a performance ID of MPEG2, and a voice input function as a service ID. An image and audio data packet 84 is simultaneously transmitted to a speaker 33 having a performance ID of MPEG2 and a recording apparatus 35 having a video and audio input function and a recording function as a service ID and having a performance ID of MPEG2. Step s99).

  The source address S5 of the image / sound data packet 84 has the same contents as the source address S1 in order to represent the function and performance of the first camera 30, as shown in FIG. 8B. On the other hand, the transmission destination address D5 is the network ID “01HEX”, the terminal ID is the address “FFHEX” indicating the broadcast, and the service ID is the image input “05” and the voice input “07” from the function code register 44 of FIG. ”, Recording“ 11 ”, and display“ 13 ”are detected to generate“ 138DHEX ”, and MPEG2“ 02 ”is detected from the performance code register 46 in FIG. 4 to generate“ 0002HEX ”.

  Among all the terminals that have received the image and audio data packet 84, the first monitor 32, the speaker 33, and the recording device 35 that are compatible with the function and performance of the response packet 85 to notify that the reception has been completed. 87 is transmitted (steps s100 to s101). The source addresses S6 to S8 in the response packets 85 to 87 output from each terminal at this time have the same contents as the source addresses S2 to S4, respectively, as shown in FIG. To D8 have the same contents as the source addresses D2 to D4.

  As described above, the first camera 30 broadcasts data to the first monitor 32, the speaker 33, and the recorder 35, and the first monitor 32 that has received the data receives the transmission destination address D5. In accordance with the contents of the service ID and performance ID included in the data, the data of the payload portion of the image and audio data packet 84 is restored and displayed as an image and audio signal in the MPEG2 format, and the speaker 33 displays the destination address. According to the contents of the service ID and performance ID included in D5, the data in the payload portion of the image and audio data packet 84 is restored to an audio signal in the MPEG2 format and output as audio, and the recorder 35 further transmits the transmission destination. According to the contents of the service ID and performance ID included in the address D5, the image, The data in the payload portion of the voice data packets 84, MPEG2 image is recorded as audio data.

  As described above, according to the first embodiment, since the function or performance of the terminal is included in the transmission source address and the transmission destination address included in the communication packet, information on other terminals is recognized from the address. Thus, communication can be performed with a minimum communication protocol in terminal search and response.

  The address generation method, address generation circuit, communication packet, and communication protocol according to the present invention are useful as a video / audio network address generation method, a communication protocol, and the like whose functions and performance can be specified to some extent.

It is a figure which shows the structure of the communication packet concerning Embodiment 1 of this invention. It is a figure which shows the structure of the address part concerning Embodiment 1 of this invention. It is a figure which shows the structure of the radio | wireless network concerning Embodiment 1 of this invention. It is a figure which shows the structure of the address generation part concerning Embodiment 1 of this invention. It is a figure which shows the function code hold | maintained at the function code register concerning Embodiment 1 of this invention. It is a figure which shows the performance code hold | maintained at the performance code register concerning Embodiment 1 of this invention. It is a figure which shows the flow of the communication packet between the terminals concerning Embodiment 1 of this invention. It is a figure which shows the transmission source address and transmission destination address of each communication packet between the terminals concerning Embodiment 1 of this invention. It is a flowchart which shows a series of flows at the time of transmitting data between the terminals which concern on Embodiment 1 of this invention. In Embodiment 1 of this invention, it is a figure which shows the flow of the communication packet at the time of performing broadcast communication with respect to multiple terminals. In Embodiment 1 of this invention, it is a figure which shows the transmission source address and transmission destination address of each communication packet at the time of performing broadcast communication with respect to multiple terminals. 4 is a flowchart showing a series of flows when data is transmitted by broadcast communication in Embodiment 1 of the present invention. It is a figure which shows the conventional address structure.

Explanation of symbols

1 Header part 2 Payload part 3 FCS
4 Address part 5 Ver
6 Type
7 Header length 8 Payload length 9 Flag ID
10 flag bit 11 flag sequence 12 source address 13 destination address 14 option 15a, 15b network ID
16a, 16b Terminal ID
17a, 17b Service ID
18a, 18b Performance ID
DESCRIPTION OF SYMBOLS 30 1st camera 31 2nd camera 32 1st monitor 33 Speaker 34 2nd monitor 35 Recorder 40 Address generation circuit 41 Network ID generation part 42 Terminal ID generation part 43 Service ID generation part 44 Function code register 45 Performance ID generation part 46 Performance code register 47 Synthesizer 60, 80 Connection request packet 61, 81, 65, 85 Response packet from first monitor 62, 82, 86 Response packet from speaker 63, 83, 87 Response packet from recorder 64, 84 Image and audio data packet

Claims (17)

In each terminal of a communication network that exchanges data between a plurality of terminals, an address generation method for generating an address included in a communication packet transmitted and received between the terminals,
Generating a terminal ID indicating the terminal;
A function code is assigned to each at least one function of the terminal, and one service ID indicating all the functions of the terminal is generated using the function code.
A terminal address is generated by combining the terminal ID and the service ID;
An address creation method characterized by this. The address generation method according to claim 1,
A performance code is assigned for each performance of at least one function of the terminal, and one performance ID indicating all of the performance of the function of the terminal is generated using the performance code,
A terminal address is generated by combining the terminal ID, the service ID, and the performance ID.
An address generation method characterized by that. The address generation method according to claim 1,
Generating a network ID indicating a terminal group of the communication network;
A terminal address is generated by combining the terminal ID, the service ID, and the network ID.
An address generation method characterized by that. The address generation method according to claim 2,
Generating a network ID indicating a terminal group of the communication network;
A terminal address is generated by combining the terminal ID, the service ID, the performance ID, and the network ID;
An address generation method characterized by that. The address generation method according to claim 1,
The service ID is generated by combining the function codes.
An address generation method characterized by the above. The address generation method according to claim 2,
The performance ID is generated by combining the performance codes.
An address generation method characterized by the above. The address generation method according to claim 1,
The service ID is generated by selecting from a correspondence table indicating all combinations of the function codes.
An address generation method characterized by the above. The address generation method according to claim 2,
The performance ID is generated by selecting from a correspondence table showing all combinations of the performance codes.
An address generation method characterized by the above. The address configuration method according to claim 1,
The service ID is generated by configuring the function code as a prime number and multiplying the prime number by each.
An address generation method characterized by the above. The address generation method according to claim 2,
The performance ID is generated by configuring each of the performance codes as a prime number and multiplying the prime number.
An address generation method characterized by the above. An address generation circuit for generating an address included in a communication packet transmitted and received between the terminals included in each terminal in a communication network for exchanging data between a plurality of terminals,
A terminal ID generation unit for generating a terminal ID indicating the terminal;
A service ID that includes a function code register that holds a function code assigned to at least one function of the terminal, and generates one service ID that indicates all of the functions of the terminal using the function code A generator,
A combining unit that generates one terminal address by combining the terminal ID and the service ID;
An address generation circuit characterized by that. The address generation circuit according to claim 11,
A performance code register that holds a performance code assigned to the performance of at least one function of the terminal, and one performance ID indicating all of the performance of the function of the terminal using the performance code; A performance ID generation unit for generating,
The synthesizing unit generates one terminal address by combining the terminal ID, the service ID, and the performance ID.
An address generation circuit characterized by that. The address generation circuit according to claim 11,
A network ID generating unit for generating a network ID indicating a terminal group of the communication network;
The combining unit generates one terminal address by combining the terminal ID, the service ID, and the network ID.
An address generation circuit characterized by the above. The addresses generated by the address generation method according to any one of claims 1 to 10 are used as a transmission source address that is an address of a transmission terminal and a transmission destination address that is an address of a reception terminal.
A communication packet characterized by that. In a communication network for exchanging data between a plurality of terminals, a control unit indicating status information necessary for communication and a payload unit for storing the data are included, and an address unit included in the control unit includes a transmission terminal In a communication protocol for transmitting and receiving communication packets between terminals, which are composed of a source address that is a terminal address and a destination address that is a terminal address of a receiving terminal,
The transmission source address and the transmission destination address use a network ID indicating a terminal group of the communication network, a terminal ID indicating the terminal, and a function code assigned to at least one function of the terminal. All of the performance of the terminal generated using one service ID indicating all the functions of the terminal generated and the performance code assigned to the performance of at least one function of the terminal It is composed of one performance ID indicating
When the transmitting terminal searches for a receiving terminal capable of exchanging data with the transmitting terminal among the plurality of terminals,
The network ID constituting the transmission source address indicates the group to which the transmission terminal belongs, the terminal ID indicates the transmission terminal in the group, and the transmission terminal executes the service ID. To indicate all of the at least one function, and to set the performance ID to indicate all of the performance of the at least one function executed by the transmitting terminal, and
The network ID constituting the transmission destination address indicates the group to which the transmission terminal belongs, the terminal ID indicates all terminals in the group, and the reception terminal executes the service ID. All of at least one function to be performed, and the performance ID to indicate all of the performance of at least one function executed by the receiving terminal,
Each receiving terminal that has received the communication packet from the transmitting terminal,
Detecting the network ID, the terminal ID, the service ID, and the performance ID constituting the transmission destination address;
The detected network ID indicates a group to which the receiving terminal belongs, the detected terminal ID includes a terminal ID indicating the receiving terminal, and the detected service ID includes the receiving terminal Is included, and only when the detected performance ID includes at least one performance code of the receiving terminal, a response is made to the transmitting terminal,
Otherwise, do not respond to the sending terminal,
A communication protocol characterized by that. The communication protocol according to claim 15,
When the transmitting terminal that has transmitted the communication packet transmits the data to one receiving terminal having a desired function and performance among the receiving terminals that have responded to the transmitting terminal,
The network ID constituting the transmission source address indicates the group to which the transmission terminal belongs, the terminal ID indicates the transmission terminal, and the service ID is executed by at least one of the transmission terminals. Indicating all of the functions, the performance ID indicating all of the performance of at least one function performed by the transmitting terminal, and
The network ID constituting the transmission destination address indicates the group to which the transmission terminal belongs, the terminal ID indicates the reception terminal, and the service ID is executed by at least one of the reception terminals. Indicating all of the functions, the performance ID indicating all of the performance of at least one function executed by the receiving terminal,
Each receiving terminal that has received the communication packet from the transmitting terminal,
Detecting the network ID, the terminal ID, the service ID, and the performance ID constituting the transmission destination address;
The detected network ID indicates a group to which the receiving terminal belongs, the detected terminal ID includes a terminal ID indicating the receiving terminal, and the detected service ID includes the receiving terminal Is included, and only when the detected performance ID includes at least one performance code of the receiving terminal, the data of the payload part of the communication packet is processed.
Otherwise, do not process the payload data,
A communication protocol characterized by that. The communication protocol according to claim 15,
When the transmitting terminal that has transmitted the communication packet broadcasts the data to the plurality of receiving terminals,
The network ID constituting the transmission source address indicates the group to which the transmission terminal belongs, the terminal ID indicates the transmission terminal, and the service ID is executed by at least one of the transmission terminals. Indicating all of the functions, the performance ID indicating all of the performance of at least one function performed by the transmitting terminal, and
The network ID constituting the transmission destination address is set to indicate a group to which the transmission terminal belongs, the terminal ID is set to indicate all terminals in the group, and the reception terminal executes the service ID. To indicate all of at least one function, and to set the performance ID to indicate all of the performance of at least one function executed by the receiving terminal,
Each receiving terminal that has received the communication packet from the transmitting terminal,
Detecting the network ID, the terminal ID, the service ID, and the performance ID constituting the transmission destination address;
The detected network ID is a group to which the receiving terminal belongs, the detected terminal ID includes a terminal ID indicating the receiving terminal, and the received function code indicates the detected service ID. Only when the terminal includes at least one function code, and the performance code indicated by the detected performance ID includes at least one performance code possessed by the receiving terminal, Process the data,
Otherwise, do not process the payload data,
A communication protocol characterized by that.

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