JP2000207234A - Communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the communication system which can flexibly queue data at high level as desired by comparing transmit data with unprocessed transmit data queued in a queue buffer and discarding transmit data stored in the queue buffer based on the comparison result. SOLUTION: Command IDs of generated data 1 and queuing data 3 (data in queue) which are queued in a queue buffer 2 are compared with each other. Only when they are transmit data of same kind, are the queueing data 3 queued in the queue buffer 2 discarded and only the newly generated data 1 is queued. Consequently, even the communication system which handles different kind of communication data together is able to queue data as desired. Command data including reproduction time information is raised in priority, and by shortening the time from the generation to the transmission of the generated data 1, the time difference is minimized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to communication between communication devices that perform wired communication or wireless communication, or communication between software modules called tasks within the same computer, or between different computers that communicate via a network. In communication between software modules called tasks in
The present invention relates to a communication system for queuing data in order to absorb a difference in information processing ability.

[0002]

2. Description of the Related Art A software module called a task in communication between communication devices performing wired or wireless communication, or in communication between software modules called tasks in the same computer, or between different computers communicating via a network. In the communication between tasks, in order to absorb the difference (for example, the speed difference) in information communication and information processing that occurs between the data transmitting side and the data receiving side, a queue buffer is provided so that data that could not be transmitted is not discarded. A buffer called is prepared, and data generated until data transmission becomes possible is buffered in a queue buffer (temporary storage).
There is a method called queuing.

FIG. 15 is a conceptual diagram for explaining a conventional queuing method. In FIG. 15, 1 is generated data generated in the communication device or task on the transmitting side,
2 is a queue buffer for sequentially buffering the generated data 1; 3, 3a and 3b are queuing data obtained by sequentially packing the generated data 1 from the head to the end of the queue buffer 2 in the order of generation, and 4 is a queue buffer 2. Is transmission data to be extracted from the head of the communication device and transmitted from the communication device or task on the transmission side to the communication device or task on the reception side.

The generated data 1 generated in the communication device or task on the transmitting side is queued immediately after the last queuing data 3b queued in the queue buffer 2. The transmission data 4 is extracted from the leading keying data 3a queued in the queue buffer 2 and transmitted. Therefore, as shown in FIG. 15, the queuing data 3 queued in the queue buffer 2 flows from the end to the head.

That is, in the conventional queuing method, generated data 1 generated in a communication device or task on the transmitting side is queued in the order of generation, and the data is queued in the order of generation as in a queue.
It was intended to be transmitted in the O system.

As a conventional communication system of this type, for example, there is a communication system disclosed in Japanese Patent Application Laid-Open No. H03-19545, entitled "Packet Transmission System". FIG. 16 is a configuration diagram showing a configuration of a conventional communication system.

In FIG. 16, reference numeral 5 denotes a communication packet generator for generating data packets for communication, 6 denotes a communication packet queue provided for each logical channel and stores the data packets generated by the communication packet generator 5, and 7 denotes a communication packet queue. A protocol controller 8 that receives a command from the packet switch, detects whether the data packet is in a transmittable state, and controls the protocol of the data packet communication. Reference numeral 8 denotes a protocol controller 7 in which the data packet can be transmitted. If the protocol packet is detected, the communication packet queue 6 is instructed to take out the communication packet and send it out to the line. 6 is a flow control unit that instructs 6 to stop sending communication packets, and 9 is a flow control unit. There is an instruction to stop the transmission of the communication packet from 8, when the transmission packet generation unit 5 creates a data packet, discards the packet accumulated to the communication packet queue 6, a communication packet creation unit 5
Is a communication queue discarding control unit that issues an instruction to send a newly created packet to the line.

[0008] In other words, in Japanese Patent Application Laid-Open No. H03-19545, "Packet Transmission System", in a system for periodically transmitting data having a time change, an untransmitted packet which is outdated in time and stored in a buffer is used. It discloses the technical contents of discarding when the latest data comes. Therefore, only the case where the type of data is one type is subject to processing.

As a conventional communication system of this type, there is, for example, a communication system disclosed in Japanese Patent Application Laid-Open No. 1-162036, "Packet Switched Data Transfer System".
FIG. 17 is a flowchart showing the operation of this conventional communication system. Next, the operation of the conventional communication system will be described with reference to FIG.

When there is a voice packet transmission request (step S1), and when the information frame is not being transmitted (step S2), the voice packet is transmitted (step S2).
3). On the other hand, when the information frame is being transmitted (step S2), first, the DMAC is stopped (step S4), and the identifier is loaded in the transmission waiting queue (step S5). Next, the first half of the information frame is transmitted (step S6), and the address register in the DMAC is stored (step S7). Next, a voice packet is transmitted (step S8), an identifier is loaded in a transmission waiting queue (step S9), and the latter half of the information frame is transmitted (step S1).
0).

[0011] That is, Japanese Patent Laid-Open Publication No. 1-162036 discloses a packet-switched data transfer system, in which a voice packet having a severe delay condition is transmitted with priority over an information packet. Therefore,
Only the case where there are two types of data is to be processed.

[0012]

[Problems to be solved by the invention]

In Japanese Patent Application Laid-Open No. 3-19545, "Packet Transmission System", in a system for periodically transmitting data having a time change, an untransmitted packet stored in a buffer which is outdated in time is updated with the latest data. Discard when comes. Therefore, the processing is correctly performed only when there is only one kind of data, and when there are a plurality of kinds of data, the discard processing in queuing cannot be performed as desired. Also, JP-A-1-162
No. 036, “Packet-switched data transfer method”, when transmitting voice packets with severe delay conditions,
The voice packet is transmitted with priority over the information packet.
Accordingly, only two types of data are correctly processed, and when there are three or more types of data, priority processing in queuing cannot be performed as desired.

However, when queuing data in a communication system that handles multimedia data in which various types of media such as voices, character codes, still images, moving images, and videos are mixed, the contents and types (media) of the data are queued. Some data cannot be discarded, some data cannot be separated or divided for convenience of display, some data can be displayed easily, and some require real-time processing (priority processing). Therefore, there has been a problem that queuing as desired cannot be performed only by simple processing such as discarding old data in time and prioritizing voice packets over information packets in data queuing.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is desired even in a communication system handling multimedia data in which various types of media such as voice, characters, still images, moving images, and videos are mixed. It is an object of the present invention to obtain a communication system capable of performing flexible and advanced data queuing.

[0016]

In order to solve the above-mentioned problems, in a first communication system, a transmitting-side communication system, a receiving-side communication system, a transmitting-side communication system, and a receiving-side communication system. Communication means for connecting with a communication system, the communication system on the transmission side, the operation target device to be operated by the user, the operation means connected to the operation target device, the user inputs operation information, Operating state transmitting means connected to the operation target apparatus and transmitting an operation state of the operation target apparatus to the receiving system via the communication means, wherein the communication system on the receiving side includes the communication means Operating state receiving means for receiving the operating state of the operation target device on the transmitting side via the transmitting side, and the operating state connected to the operating state receiving apparatus and received by the operating state receiving means Display means for displaying the operation state, the operation state transmission means in the transmission-side system or the operation state reception means in the reception-side communication system includes a buffer called a queue buffer, and transmission or reception data is generated. If transmission or processing could not be performed, the transmission or reception data that occurred and could not be transmitted or processed could not be transmitted or processed until transmission or processing of the transmission or reception data could be performed. Using a method called queuing to buffer in the queue buffer, when transmission or reception data occurs, the generated transmission or reception data cannot be transmitted or processed and is queued in the queue buffer. Compares with the transmitted or received data, and based on the result of the comparison, Or discard the transmitted or received data stored in the queue buffer, or the transmission or reception data generated, characterized in that queuing the position closer to the head of the queue buffer.

In order to solve the above problem, in the second communication system, the operating state transmitting means in the transmitting side system or the operating state receiving means in the receiving side communication system is configured to transmit or receive data. When it occurs, the generated transmission or reception data is compared with the transmission or reception data queued in the queue buffer without being transmitted or processed,
If both are the same type of transmission or reception data, it is necessary to discard the transmission or reception data stored in the queue buffer and queue only the newly generated transmission or reception data in the queue buffer. Features.

In order to solve the above-mentioned problem, in the third communication system, the operating state transmitting means in the transmitting system or the operating state receiving means in the receiving communication system is configured to transmit or receive data. If this occurs, the priority of the generated transmission or reception data is determined based on the content of the generated transmission or reception data, and the priority of the generated transmission or reception data is not transmitted or processed. Compare the priority of the queued transmission or reception data with the transmission or reception data or the transmission or reception data queued in the queue buffer generated in the order of higher priority based on the comparison result. Is transmitted or received.

In order to solve the above problem, in the fourth communication system, the operating state transmitting means in the transmitting side system or the operating state receiving means in the receiving side communication system is configured to transmit or receive data. In the event of occurrence, the transmission or reception data generated or based on the data content or data type of the transmission or reception data queued in the queue buffer because transmission or reception could not be performed or processed. The priority of the transmission or reception data queued in the queue buffer without being received or data and / or transmission or processing is determined or the processing content is determined, and the transmission or reception data or the data generated based on the determination result is determined.・ If the above queue Characterized by processing the transmitted or received data queued to §.

In order to solve the above problem, in a fifth communication system, the communication system on the transmitting side includes a sound output means or / and a simple display means. Make a sound, or
A simple display of the input information by the simple display means, and a display in advance that the user has performed the input of the operation information to the user; an actual operation state is displayed on the display means of the communication system on the receiving side; Is carried out at the time of receiving or after that.

In order to solve the above problem, in a sixth communication system, the transmitting communication system, the receiving communication system, and the communication means are included in the same computer, and The communication means is characterized in that data communication is performed between software modules called tasks in the same computer.

To solve the above problem, in a seventh communication system, the communication system on the transmitting side and the communication system on the receiving side are included in different computers, respectively, and the communication means is provided between the different computers. , Wherein the communication means performs data communication between the software modules called tasks between the different computers via the network.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, a communication system according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram showing a configuration of a communication system according to a first embodiment of the present invention.

In FIG. 1, 10 is a communication system on the transmission side, 11 is a communication system on the reception side, and 12 is a communication line connecting the communication system 10 on the transmission side and the communication system 11 on the reception side. Further, in the communication system 10 on the transmitting side, reference numeral 13 denotes an operation target device to be operated by the user;
Is an operation unit that is connected to the operation target device 13 and used by the user to operate the operation target device 13. Reference numeral 15 is connected to the operation target device 13 and is connected to the communication system 11 on the receiving side via the communication line 12. 13 is an operation state transmission device for transmitting the operation state of the operation state No. 13. Further, in the communication system 11 on the receiving side, 16 is an operation state receiving device for receiving the operation state of the operation target device 13 from the communication system 10 on the transmitting side via the communication line 12, and 17 is connected to the operation state receiving device 16. , A display device that displays the operation state of the operation target device 13.

The communication line 12 may be wired communication or wireless communication, or a combination thereof. Also,
The communication line 12 may be a public network or a dedicated line, or a combination thereof. The communication line 12 may be an analog line, a digital line, or a combination thereof.

FIG. 2 is a configuration diagram showing a configuration of a car navigation system as a specific system of the communication system shown in FIG. Hereinafter, a car navigation system will be described as a specific example of a communication system. However, the present invention is not limited to this, and may be applied to other communication systems such as a home information communication system, an in-vehicle information communication system, and a portable information communication system. It is possible.

In FIG. 2, 18 is a car navigator, 1
9 is a display device connected to the car navigator 18, and 20 is a serial cable connecting the car navigator 18 and the display device 19. In the car navigator 18, reference numeral 21 denotes an operation unit for the user to operate the car navigator 18, and reference numeral 22 denotes an operation state transmission device for transmitting the operation state of the car navigator 18 to the display device 19. Also,
In the display device 19, an operation state receiving device 23 receives the operation state of the car navigator 18 from the car navigator 18 via the serial cable 20, and a display device 24 displays the operation state of the car navigator 18 received by the operation state receiving device 23. It is a display unit.

A user (not shown) operates the car navigator 18 from the operation unit 21, and according to an instruction from the user from the operation unit 21 or automatically operates.
2 is a car navigator 18 via a serial cable 20
The display device 1 displays operation state data indicating the state in which the
Send to 9. The operation state receiving device 23 receives the operation state data from the car navigator 18 via the serial cable 20 and displays the operation state data received by the operation state receiving device 23 on the display unit 24 of the display device 19.

The car navigator 18 of the car navigation system shown in FIG. 2 corresponds to the operation target device 13 of the communication system shown in FIG. 1, and the display device 19 of the car navigation system shown in FIG. This corresponds to the display device 17 shown in FIG. That is, FIG.
In the car navigation system shown in FIG. 1, the operation unit 14 and the operation state transmitting device 15 shown in FIG.
3 as well as the operation state receiving device 16 shown in FIG.

In the car navigation system shown in FIG. 2, the operating states acquired by the operating state transmitting device 22 include, for example, the following. Each time the user presses a key (not shown) of the operation unit 21 of the car navigator 18, a function assigned to the key operates, and, for example, (playback of a CD that displays a travel map (city map, road map)) An operation indicating the operation state of the car navigator 18 every time the operation state of the car navigator 18 changes, such as displaying time, operating the car navigator 18 by a user, displaying city information, displaying road information, and the like. The status data is transmitted from the operating status transmitting device 22 to the operating status receiving device 23 of the display device 19 via the serial cable 20, and is displayed on the display unit 24.

In the car navigation system shown in FIG. 2, the transmission data on the display device 19 on the receiving side is caused by the difference in the capability of information communication and information processing between the car navigator 18 on the transmitting side and the display device 19 on the receiving side. Data queuing is performed so that no data is lost. For queuing the operation state data, the operation state transmission device 22 of the car navigator 18 on the transmission side or the operation state reception device 23 of the display device 19 on the reception side, as shown in FIG.
A queue buffer 2 as shown in FIG.

With respect to the queue buffer 2 shown in FIG.
The operation state transmission device 22 on the transmission side shown in FIG. 2 queues the operation state data immediately after the last queuing data 3b in the queue buffer 2 shown in FIG. 15, and the operation state reception device 23 on the reception side shown in FIG. Acquires operation state data from the queuing data 3a at the head of the queue buffer 2 shown in FIG. It should be noted that the difference in capability of information communication and information processing that temporarily occurs between the data transmitting side and the data receiving side can be absorbed by increasing the size of the queue buffer 2 shown in FIG.

FIG. 3 shows the queue buffer 2 shown in FIG.
3 is a diagram showing a data structure of queuing data 3a,..., 3,..., 3b queued in a queue buffer 2. In FIG. 3, reference numeral 25 denotes a header for storing a pointer pointing to the head of the queue (head of data of queue 1), reference numeral 26a denotes queue 1 (head queue) for storing data of queuing data 3a, and reference numeral 26 denotes queuing data 3 Queue n (n = 2, 3,
4,..., N-1, N are the number of queuing data queued in the queue buffer 2 shown in FIG.
26b is a queue N (tail queue) for storing the data of the queuing data 3b, and 27 is a tailor storing data indicating the end of the queue. In the queue n26, 26c is the data of the queue n, 26d
Is a pointer indicating the head of the data in the queue (n + 1).

To queue the generated data 1 generated from the car navigator 18 and transmit it, the queuing data 3a,..., 3 stored in the queue buffer 2 using a data structure as shown in FIG. , ..., 3b data management is performed. First, in order to store the generated data 1 in the queue buffer 2 shown in FIG. 10, a header 25 for storing a pointer indicating the head of the queue buffered in the queue buffer 2 (the head of the data of the queue 1) is prepared. Normally, the header 25 stores the head address of the storage area in which the head (queue 1) queuing data 3a queued in the queue buffer 2 is stored. The queues are referred to as queue 1, queue 2,... In order from the top. When transmitting the queuing data 3, the transmission is performed in the order of queue 1, queue 2,.... Normally, the generated data 1 is connected to the queuing data 3b of the last queue (queue N in the example of the present embodiment shown in FIG. 3) 26b.

In order to grasp the order of queuing, queues 126a,..., Queues n26,.
.., Queue N26b has data 2 of queue n for transmission.
6c (n = 1, 2, 3,..., N, N is the number of queuing data queued in the queue buffer 2) and a pointer 26d indicating the head of the next connected queuing data. Store. By following this, the arrangement of queues can be grasped and managed.

FIG. 4 is a diagram showing a data structure of data of queue n, generated data 1 and transmission data 4 in the communication system according to the first embodiment of the present invention. In FIG. 4, reference numeral 28 denotes command data indicating data of the queue n, 28a denotes a command ID indicating a command type (identifier), and 28b denotes operation state data indicating an operation state of the communication system.

When the generated data 1 is compared with the data in the queue n, first, the command ID 28a of the generated data 1 is checked. Subsequently, for the queue in the queue buffer shown in FIG. 3, the header 25 is referred to, a pointer to the head of the queue is obtained, and the data at the head of the queue (queue 126a) is referred to. Then, the command ID 28a in the data 28 of the queue 1 of the queue 126 is referred to. next,
This is repeated until a pointer pointing to the head of the next (queue 2) data included in the queue 126a is detected and a pointer pointing to the tail (Taylor 27) of the queue is detected.

As shown in FIG. 4, the generated data 1, the transmission data 4, and the data 26c of the queue n each have a predetermined data structure called command data 28.
The command data 28 is divided into a command ID 28a and operation state data 28b. The operation state data 28b is
The structure differs depending on the type of the command ID 28a and is independent for each command ID 28a.

For example, there are command data (command ID) for notifying user operation information and command data (command ID) for displaying a reproduction time of a CD. For example, the command data for displaying the reproduction time of the CD has the same command ID, and the reproduction time is input to the data area of the operation state data 28b.

In a communication system that queues data for the command data 28, the following occurs. That is, for some reason, the communication system 1 on the receiving side is compared to the communication system 10 on the transmitting side of data.
When the data reception amount of No. 1 is decreasing, the transmission data accumulates in the queue buffer 2. Queue buffer 2
Is large, or if it takes a long time to receive the data, even if the receiving communication system 11 can receive the transmission data, the received data is already past data and is useless. At this time, the same kind of data newly generated in the communication system 10 on the transmitting side is queued at the end of the queue.

For example, if command data indicating the playback time of a CD is generated from the car navigator 18 and accumulates in the queue buffer 2 for a long time for some reason and it takes time until the command data is received, Has no meaning even if it is displayed. Also, at this time, even if command data for displaying the reproduction time of the CD is newly generated, it is queued at the end of the queue buffer 2.

FIG. 5 is an operation explanatory diagram for explaining the operation of deleting the queuing data 3 queued in the queue buffer 2. In FIG. 5, reference numeral 29 denotes queuing data in which generated data 1 is queued at the end of the queue buffer 2. FIG. 6 is an operation explanatory diagram for explaining the operation of deleting the queuing data queued in the queue buffer 2. In FIG.
Reference numerals 30, 31, and 32 indicate queues, 32c indicates a pointer pointing to the head of the data of the queue 31, and 32c indicates data of the queue 32. Note that the same or corresponding parts are denoted by the same reference numerals and description thereof is omitted.

As shown in FIGS. 5 and 6, the generated data 1 is compared with the command ID 28a of the data 26c of the queue n queued in the queue buffer 2, and the same type of data (data of the same command ID) is deleted. By doing so, the time until the generated data is transmitted can be shortened, and the size of the queue buffer 2 can be further reduced. In the example shown in FIG. 5, the queuing data 3 having the same type of data as the generated data 1 is deleted from the queue buffer 2, and the generated data 1 is queued at the end of the queue buffer 2 to become queuing data 29.

For example, if the command data includes reproduction time information as in the above example, only command data including the latest reproduction time information can be transmitted. Therefore, the queuing data including the command data including the old reproduction time information is deleted from the queue buffer 2. As shown in FIG. 6, the queuing data (queue 31) is deleted by changing the pointer 32c of the queue 32 that points to the head of the data of the queue 31 so as to point to the head of the data of the queue 30. be able to.

In the first embodiment, the operation state transmitting device 15 in the communication system 10 on the transmitting side or the operation state transmitting device 22 in the car navigator 18 has the queue buffer 2 and transmits the queuing process to the operation state. The case where the operation is performed by the device 15 or the operation state transmission device 22 has been described. However, the present invention is not limited thereto. The queuing process may be performed by the operation state receiving device 16 or the operation state receiving device 23.

As described above, the generated data 1 and the queuing data 3 queued in the queue buffer 2
(Queue data) and the command ID 28a,
The queuing data 3 queued in the queue buffer 2 only when the two are the same type of transmission data.
Is discarded and only the newly generated data 1 is queued, so that even in a communication system in which a plurality of types of communication data coexist, data can be queued as desired.

Embodiment 2 Also, by increasing the priority of command data (command ID) including reproduction time information, the time from generation of the generated data 1 to transmission can be shortened, and a time lag can be minimized.

FIG. 7 is an operation explanatory diagram for explaining the operation of inserting queuing data. In FIG. 7, 3
Numeral 3 denotes queuing data at the head of the queue buffer 2, and numeral 34 denotes queuing data including generated data 1. FIG. 8 is an operation explanatory diagram for explaining an operation of inserting queuing data. In FIG. 8, 3
5, 36, 37, and 38 indicate queues, 37c indicates data of the queue 37, and 37d indicates a pointer indicating the head of the data of the queue 36. Note that the same or corresponding parts are denoted by the same reference numerals and description thereof is omitted.

For example, if the generated data 1 is command data for transmitting data that is meaningless even if a past state such as a time display is transmitted, as shown in FIG. The generated data 1 is queued near the head, and can be immediately transmitted as transmission data 4. In this case, it is necessary to generate the queuing data 34 by queuing the generated data 1 by being interrupted in the middle of the queue buffer 2 (at or near the head). In the example shown in FIG. 7, the generated data 1 is interrupted (inserted) between the queuing data 2 and the queuing data 3 to form the queuing data 7.

To queue generated data 1 by interrupting it between queuing data, as shown in FIG.
The generated data 1 is queued in the queue 38, and the queue 3
7, the pointer 37c indicating the head of the data is changed from the queue 36 to the queue 38, and the pointer indicating the head of the data in the queue 38 is changed to the queue 36.

Further, by using the methods described in the first and second embodiments together, the reproduction time display can be updated at once, and the display of the past data is not required. Can minimize the staying time of the latest generated transmission data in the queue.

In the second embodiment, the operating state transmitting device 15 in the communication system 10 on the transmitting side or the operating state transmitting device 22 in the car navigator 18 has the queue buffer 2 to transmit the queuing process to the operating state. The case where the operation is performed by the device 15 or the operation state transmission device 22 has been described. However, the present invention is not limited thereto. The queuing process may be performed by the operation state receiving device 16 or the operation state receiving device 23.

As described above, the priority of the generated data 1 is determined from the content of the generated data 1, and the priority of the generated data 1 and the queuing data (queue data) queued in the queue buffer 2 are determined. Compare and generate data 1
Is determined, the desired data can be queued irrespective of the type of mixed data (type of command data or command ID).

Embodiment 3 FIG. In the first embodiment, when communication data of the same type as the generated communication data exists in the queue buffer 2, the communication data stored in the queue buffer 2 is discarded. 2. Description of the Related Art In a communication system that handles multimedia data in which various types of data (media) such as images, moving images, and videos are mixed, communication data generated according to the data type (media) of the generated communication data and the data content and transmission cannot be performed. The restrictions and priorities in handling data queued in the queue buffer are different.

FIG. 9 shows voices, characters, still images, moving images,
It is a table which shows the structure of the data type processing content table which described the processing content by the data type (media), such as a video. In FIG. 9, reference numeral 40 denotes a data type processing content table, which separates / divides data, discards data,
Regarding the simplified display of data, “○” indicates that processing is possible for each of the data types (media), and “×” indicates that processing is not possible. In addition, the necessity in real time is expressed by a normal priority, but in the third embodiment, the necessity is expressed by a relative priority to simplify the description.

In the data type processing content table 40 of FIG. 9, for example, the data type (media) of the transmission data
Is a voice, the real-time necessity is the highest (the relative priority is 1), which means that data separation / division, data discarding, and simple data display are both impossible. . When the data type (media) of the transmission data is a moving image, the real-time necessity is medium (relative priority is 3).
This expresses that division, discarding of data, and simple display of data are both possible.

FIG. 10 is a table showing the configuration of a data content processing item table in which processing items such as priority by data content and data type (media) are described. In FIG. 10, reference numeral 41 denotes a data content processing item table. For each data content (the car navigation system in the third embodiment), priority (relative priority), data type ( Media). For example, priorities are assigned to data as shown in FIG. In this case, the priority of the operation information of the user is 1, which is the highest priority. In the third embodiment, a part of each data content is excerpted and described by taking the car navigation system as an example, as described above.

In the data content processing item table of FIG. 10, for example, when the data content of the transmission data is a display of a traveling map, the priority is the lowest (the relative priority is 5), and the traveling map is a moving image. Expresses the display. Further, when the data content of the transmission data is the user operation information, the priority is the highest (the relative priority is 1), indicating that the transmission is performed by “character”. When the data content is “display of city information”, the priority is medium (the relative priority is 3), and the city information is transmitted by voice, still image, text, and voice, It indicates that a still image and characters are transmitted in that order.

By combining the data type processing content table 40 shown in FIG. 9 with the data content processing item table shown in FIG.
, Communication data queuing can be performed flexibly and highly with respect to a car navigation system.

FIG. 11 is a table showing the structure of a data content processing content table created by combining the data type processing content table 40 shown in FIG. 9 and the data content processing item table shown in FIG. In FIG. 11, reference numeral 42 denotes a data content processing item table describing the relationship between data content and processing item, and reference numeral 43 denotes a processing content data content table describing the relationship between processing content and data content.

In the data content processing item table 42 shown in FIG. 11, for each data content (the car navigation system in the third embodiment), priority (relative priority), The point of describing the data type (media) is the same as that of FIG. 10, but the data content can be further described for the data type (media) of the processing item. By following the "pointer to detailed information", it is possible not only to reach the data type (media), but also to refer to the processing contents.

For example, in the example of the data content processing item table 42 shown in FIG. 11, when the data content is a display of a travel map, the column of the data type (media) is <travel map>. Here, it is assumed that the data enclosed in parentheses “<>” indicates not the data type (media) but the data content. Therefore, when the pointer to the detailed data is traced, the processing reaches the processing content data table 43 which describes the relationship between the data content and the processing content. In the example of FIG. 11, there are two types of travel maps, a city map and a road map, and the data type (media) of the city map is a still image,
This indicates that the data type (media) of the road map is a moving image. In addition, the real-time necessity is higher for a road map (relative priority 1) than for a city map (relative priority 2), and the data of the road map can be discarded. In addition, it is described that the data cannot be discarded in the city map. The priority may be set by a user (an end user of the communication system or a programmer of an application program).

In the case of FIG. 9, data can be separated and divided from the moving image, but not in the case of FIG. In FIG. 9, when the data type (media) is determined, the processing content is uniform, but in the case of FIG. 11, the processing content can be finely set according to the data content. Further, in the example shown in FIG.
Although the data type (media) is only a moving image, FIG.
In the example shown in FIG. 1, the traveling map is a city map and a road map.
A type can be prepared, and a data type (media) can be set for each.

FIG. 12 is a diagram showing the data structure of queue n, corresponding to FIG. In FIG. 12, reference numeral 44 denotes a data structure of a queue n. In the data structure 44 of the queue n, reference numeral 45 denotes a command ID in which a command ID is represented by an identifier; 46, a data content in which data content is represented by an identifier; Is a numerical priority,
48 is a data type in which the data type is represented by an identifier, 49 is a processing content in which the processing content is represented by an identifier, and 50 is an operation state data in which operation state data is represented by an identifier.

The command ID 45 and the operation status data 50 are the same as the data structure of the queue n shown in FIG. 4, but in the third embodiment, the data content 46 and the priority 4
7, a data type 48, and a processing content 49 are newly added. The added portions (data content 46, priority 47, data type 48, processing content 49) are respectively the data content, priority, and data type (media) processing content of the data content processing content table shown in FIG. Provided for storing an identifier.

FIG. 13 is a table for explaining the operation of the communication system according to the third embodiment of the present invention. In FIG. 13, reference numeral 51 denotes a table expressing the contents of the queue buffer in time series. Note that the same or corresponding parts are denoted by the same reference numerals and description thereof is omitted. FIG.
In queue buffer 3, queue 1 is the first queue and queue 3 is the last queue. FIG.
In FIG. 3, the generated data 1, the data in the queue n of the queue buffer 2, and the transmission data 4 are a data content 46 and a data type 48, respectively, in order to simplify the drawing and make it easier to see.
Only listed. Further, the expressions of the identifiers of the data contents 46 and the data types 48 in FIG. 13 are abbreviated as follows.

"User character" means that the data content is "user operation information" and the data type is "character". "Street voice" has a data content of "display city information"
Means that the data type is "voice". “City map” means that the data content is “display of city information” and the data type is “still image”. "City letters"
Means that the data content is "display of city information" and the data type is "character". “Road voice” means that the data content is “display of road information” and the data type is “voice”. “Road map” means that the data content is “display of road information” and the data type is “moving image”. “Road character” means that the data content is “display road information” and the data type is “character”.

Next, the operation of the communication system according to the third embodiment of the present invention will be described with reference to the diagrams shown in FIG. 11 and FIG.

First, at time T1, the "road character" as transmission data 4 is transmitted. At time T1, it is assumed that queues 3a, 3 and 3b of "road voice", "road map" and "road character" have been queued in the queue buffer 2 from the beginning. Further, it is assumed that “user character” has occurred as generated data 1 at time T1.

Next, at time T2, first, at time T
In step 1, “road voice”, which is the queue 3 a queued at the head of the queue buffer 2, is transmitted as transmission data 4. Next, generated data 1 at time T1
Is a “user character”, and therefore, referring to the data content processing item table 42 shown in FIG. 11, since the “user operation information” has the highest priority (the relative priority is 1), the “user character” Is queued at the head of the queue buffer 2, that is, at the position of the head queue 3a. Next, it is assumed that “town voice” is generated as generated data 1 at time T2.

Next, at time T3, first, at time T
2, the “user character” which is the queue 3 a queued at the head of the queue buffer 2 is the transmission data 4.
Sent as Next, since the generated data 1 at time T2 is “town voice”, referring to the data content processing item table 42 shown in FIG. 11, “display of city information” (relative priority is 3) is “ View Road Information "
Since the priority is higher than (the relative priority is 4), the queue is queued at a position closer to the head (position of the queue 3a) in the queue buffer 2 than the queues 3 and 3b of "road map" and "road character". Is done. Next, at time T3,
It is assumed that “town map” has occurred as occurrence data 1.

Next, at time T4, first, at time T
In step 3, “city voice”, which is the queue 3 a queued at the head of the queue buffer 2, is transmitted as transmission data 4. Next, generated data 1 at time T3
Is a "city map", so referring to the data content processing item table 42 shown in FIG. 11, "display of city information" (relative priority is 3) is "display of road information".
Since the priority is higher than (the relative priority is 4), the queue is queued at a position closer to the head (position of the queue 3a) in the queue buffer 2 than the queues 3 and 3b of "road map" and "road character". Is done. Next, at time T4,
It is assumed that “town character” has occurred as occurrence data 1.

Next, at time T5, first, at time T
The “town map”, which is the queue 3 a queued at the head of the queue buffer 2 in 4, is transmitted as transmission data 4. Next, generated data 1 at time T4
Is a "town character", so that referring to the data content processing item table 42 shown in FIG. 11, "display of city information" (relative priority is 3) is "display of road information".
Since the priority is higher than (the relative priority is 4), the queue is queued at a position closer to the head (position of the queue 3a) in the queue buffer 2 than the queues 3 and 3b of "road map" and "road character". Is done. Next, at time T5,
It is assumed that “road sound” has occurred as occurrence data 1.

Next, at time T6, first, at time T
At 5, “town character”, which is the queue 3 a queued at the head of the queue buffer 2, is transmitted as transmission data 4. Next, generated data 1 at time T5
Is "road voice", so referring to the data content processing item table 42 shown in FIG. 11, "road voice" of the generated data 1 and "road map""roadtext" already queued in the queue buffer 2 Queues 3 and 3b
Has the same priority. Therefore, when the processing content data table 43 is referred to by tracing the pointer to the detailed information, the “road map” can be discarded, and the “road map” already queued in the queue buffer 2 and the corresponding “road map” Discard each queue 3, 3b of "Road character"
The “road voice” that is the generated data 1 is queued at the head of the queue buffer 2 (the position of the queue 3a). Next, it is assumed that a “road map” has occurred as occurrence data 1 at time T6.

Next, at time T7, first, at time T
In step 6, “road voice”, which is the queue 3 a queued at the head of the queue buffer 2, is transmitted as transmission data 4. Next, since no queue is queued in the queue buffer 2, the “road map” that is the generated data 1 at the time T6 is stored in the queue buffer 2.
(The position of the queue buffer 3a). Next, it is assumed that “road character” has occurred as occurrence data 1 at time T7.

Next, at time T8, first, at time T
The “road map” which is the queue 3 a queued at the head of the queue buffer 2 at 7 is transmitted as transmission data 4. Next, since no queue is queued in the queue buffer 2, the "road character" which is the generated data 1 at time T6 is stored in the queue buffer 2.
(The position of the queue buffer 3a).

In the example shown in FIG. 13, the generated data 1 are arranged in the order of “city voice”, “city map”, and “city text” in the order of higher priority (relative priority) (voice: 1, still image: 4, character: 5) (refer to the data type processing content table 40 shown in FIG. 9), and no priority processing is performed between them, but if the order of occurrence differs from the priority, , Priority processing may be performed between them.

In the third embodiment, the operation state transmitting device 15 in the communication system 10 on the transmitting side or the operation state transmitting device 22 in the car navigator 18 has the queue buffer 2 to transmit the queuing process to the operation state. The case where the operation is performed by the device 15 or the operation state transmission device 22 has been described. However, the present invention is not limited thereto. The queuing process may be performed by the operation state receiving device 16 or the operation state receiving device 23.

As described above, the priority or the processing content of the generated data 1 is determined based on the content or the type and the type (media) of the generated data 1 and the queuing queued in the queue buffer 2 is determined. The queuing position of the generated data 1 is determined from at least one of the contents (type of data), type (media), priority, and processing contents of the data (queue data), and the queuing data (queue data) that has been queued is determined. Process
Even in a communication system that handles multimedia data in which various types of media such as voices, character codes, still images, moving images, and videos are mixed, data queuing can be performed as desired.

Embodiment 4 In the case of displaying the change of the operation state when the user performs an operation, when using data queuing, the operation state change generated as a result of performing the operation is received and displayed. It may take some time. In such a case, the user cannot immediately recognize whether or not the input has been accepted.

In such a case, for example, when the command ID 45 of the generated data 1 is “user operation information”,
By providing a buzzer or a simple display unit in the operation state transmitting device shown in FIG.
The user can be notified by sound or simple display that data has been input before queueing.

As described above, the transmitting communication system is provided with the operation unit for the user to input operation information, and the receiving communication system is provided with the display unit for displaying the operation state of the device to be operated by the user. The transmitting side emits a sound before data queuing, or displays a simplified display of input information, indicates to the user in advance that the user has input operation information, and displays the actual operating state on the receiving side. When the data is received at or after the reception, the usability of the user in the communication system is improved.

Embodiment 5 Also, in the communication system (car navigation system) shown in FIG. 2, when the calculation of the calculation unit (not shown) takes longer than the communication speed of the data sent from the serial cable, that is, the information communication takes longer than the information communication. If the processing takes a long time, data queuing can be further performed inside the display device.

FIG. 14A is a conceptual diagram schematically showing data communication between software modules called tasks in a computer. In FIG. 14A, 52 is a computer, and 53a and 53b are tasks inside the computer 52. In this case, FIG.
As shown in (1), data queuing can be performed also in communication between software modules called a task.

In the communication system shown in FIG.
When the communication line 12 is a network, or in the communication system (car navigation system) shown in FIG. 2, the serial cable 20 is replaced by wireless communication or the like and the car navigator 18 and the display device 19 are connected to the network, When communication is performed between software modules called via a network, data queuing can be performed in the same manner as in the first to fourth embodiments.

FIG. 14B is a conceptual diagram schematically showing data communication between tasks between different computers. In FIG. 14B, 54a and 54b are computers, 55a is a task inside the computer 54a, 5
5b is a task inside the computer 54b. In this case, as shown in FIG. 14B, data queuing can be performed in communication between software modules called tasks via a network in the same manner as in the first to fourth embodiments.

As described above, since data communication is performed between software modules called tasks on the same computer, data queuing between tasks can be performed. Further, since data communication is performed between software modules called tasks between different computers via a network, data queuing between tasks can be performed.

[0088]

As described above, according to the first communication system of the present invention, when transmission or reception data occurs, the generated transmission or reception data and the transmission or reception queued in the queue buffer. Compare with the data and discard the transmitted or received data stored in the queue buffer based on the comparison result, or queue the generated transmitted or received data at a position closer to the head of the queue buffer, Even in a communication system in which a plurality of types of communication data are mixed, there is an effect that desired data queuing can be performed.

Further, according to the second communication system of the present invention, when transmission or reception data is generated, the transmission or reception data queued in the queue buffer is compared with the transmission or reception data, and both of them are the same type of transmission data. Only in the case of, the transmission or reception data queued in the queue buffer is discarded and only newly generated transmission or reception data is queued, so that even in a communication system in which a plurality of types of communication data are mixed, as desired. There is an effect that data queuing can be performed.

According to the third communication system of the present invention, when transmission or reception data occurs, the priority of the transmission or reception data generated is determined from the contents of the transmission or reception data generated. Comparing the priority of the generated transmission or reception data with the priority of the transmission or reception data queued in the queue buffer because the transmission or processing cannot be performed, and the generated transmission or reception data is If it is determined that the priority is higher than queuing in the queue buffer because transmission or processing cannot be performed, the generated transmission or reception data is queued at a position closer to the head of the queue buffer. Queuing of data as desired even in a communication system in which communication data There is.

According to the fourth communication system of the present invention, when transmission or reception data occurs, the generated transmission or reception data or / and cannot be transmitted or processed and are queued in the queue buffer. The priority of the transmission or reception data or the transmission or reception data queued in the queue buffer without being transmitted or processed due to the data content or data type of the transmission or reception data or And the processing content is determined, and the transmission or reception data generated based on the determination result or
Also, since the transmission or reception data queued in the queue buffer without being transmitted or processed is processed, multimedia data including various types of media such as voice, character code, still image, moving image, and video are mixed. In a communication system to be handled, there is an effect that desired data queuing can be performed.

Further, according to the fifth communication system of the present invention, the communication system on the transmission side is provided with sound output means or / and simple display means. Make sound from the means,
And / or a simple display of the input information by the simple display means, in advance that the user has performed the input of the operation information is displayed to the user, and the display of the actual operation state is performed by the reception side communication system. Is performed at the time of or after the execution of the communication, there is an effect that the usability of the user in the communication system is improved.

According to the sixth communication system of the present invention, since data communication is performed between software modules called tasks on the same computer, there is an effect that data queuing can be performed between tasks.

Further, according to the seventh communication system of the present invention, since data communication is performed between software modules called tasks between different computers via a network, data queuing between tasks can be performed. There is.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a configuration of a communication system according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a configuration of a car navigation system as a specific system of the communication system according to the first embodiment of the present invention.

FIG. 3 is a diagram showing a data structure of a queue buffer and queuing data in the communication system according to the first embodiment of the present invention.

FIG. 4 is a diagram showing data structures of queue data, generated data, and communication data in the communication system according to the first embodiment of the present invention.

FIG. 5 is an operation explanatory diagram illustrating an operation of deleting queuing data in the communication system according to the first embodiment of the present invention.

FIG. 6 is an operation explanatory diagram illustrating an operation of deleting queuing data in the communication system according to the first embodiment of the present invention.

FIG. 7 is an operation explanatory diagram for describing an operation of inserting queuing data in a communication system according to a second embodiment of the present invention.

FIG. 8 is an operation explanatory diagram illustrating an operation of inserting queuing data in a communication system according to a second embodiment of the present invention.

FIG. 9 is a table showing a configuration of a data type processing content table in the communication system according to the third embodiment of the present invention.

FIG. 10 is a table showing a configuration of a data content processing item data table in a communication system according to a third embodiment of the present invention.

FIG. 11 is a table showing a configuration of a data content processing content table in the communication system according to the third embodiment of the present invention.

FIG. 12 is a diagram showing a data structure of queue data in a communication system according to a third embodiment of the present invention.

FIG. 13 is a table for describing an operation in the communication system according to the third embodiment of the present invention.

FIG. 14 is a conceptual diagram schematically showing data communication between tasks in a communication system according to a fifth embodiment of the present invention.

FIG. 15 is a conceptual diagram illustrating a queuing method in a conventional communication system.

FIG. 16 is a configuration diagram showing a configuration of a conventional communication system.

FIG. 17 is a follow chart showing the operation of the conventional communication system.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Communication system on transmission side 11 Communication system on reception side 12 Communication line 13 Device to be operated 14 Operation unit 15 Operation state transmission device 16 Operation state reception device 17 Display device 18 Car navigator 19 Display device 20 Serial cable 21 Operation unit 22 Operation state Transmission device 23 Operation status reception device 24 Display unit 25 Header 26 Queue n, 26a Queue 1, 26b Queue N 26c Queue n data 26d Pointer pointing to the head of queue (n + 1) data 27 Taylor 28 Data structure of queue n data , 28a command ID, 28b operation status data 29 queuing data 30, 31, 32 queue 32c pointer pointing to the head of data in queue 31 d data in queue 32 33, 34 queuing data 35, 36, 37 queue 37 Pointer indicating the head of the data of the queue 36 d 37 data of the queue 37 38 queue 40 data type processing content table 41 data content processing item table 42 data content processing item table 43 processing content data content table 44 data structure of queue n data 45 command ID 46 Data contents 47 Priority 48 Data type 49 Processing contents 50 Operation status data 51 Table expressing the contents of the queue buffer in time series 52 Computers 53a, 53b Tasks 54a, 54b Computers 55a, 55b Tasks In the drawings, the same reference numerals Indicates the same or corresponding parts.

Continued on the front page F term (reference) 5B045 BB31 EE29 GG01 5B089 GA04 JA00 KA05 KC39 KC46 KC51 KD01 KD04 KD10 LB13 5B098 AA10 CC08 FF02 GA04 GB10 GB13 GB15 GC16 5K034 HH42 HH58 MM21

Claims (7)

[Claims] 1. A communication system comprising: a communication system on a transmission side; a communication system on a reception side; and communication means for connecting the communication system on the transmission side and the communication system on the reception side. An operation target device to be operated by the user; an operation unit connected to the operation target device for inputting operation information by the user; and an operation of the operation target device connected to the operation target device via the communication unit Operating state transmitting means for transmitting a state to the system on the receiving side, wherein the communication system on the receiving side receives the operating state of the operation target device on the transmitting side via the communicating means. And display means connected to the operating state receiving device for displaying the operating state received by the operating state receiving means, wherein the operating state in the transmission side system is provided. The transmitting means or the operating state receiving means in the communication system on the receiving side includes a buffer called a queue buffer, and when transmission or reception data is generated and transmission or processing cannot be performed, the transmission or processing is performed and transmission or processing is performed. The method uses a method called queuing in which the transmission or reception data that cannot be transmitted or processed and which cannot be transmitted or processed is buffered in the queue buffer until transmission or processing of the transmission or reception data that cannot be performed is performed. Or, when received data is generated, the generated transmitted or received data is compared with the transmitted or received data that cannot be transmitted or processed and is queued in the queue buffer, and the queue buffer is determined based on the comparison result. Destroy transmitted or received data stored in Communication system, characterized in that queuing the transmission or reception data generated at a position closer to the head of the queue buffer. 2. The method according to claim 1, wherein the operation state transmitting means in the transmission side system or the operation state receiving means in the reception side communication system, when the transmission or reception data occurs, transmits the transmission or reception data generated and the transmission. Or comparing the transmission or reception data queued in the queue buffer without being processed, and if both are the same type of transmission or reception data, the transmission or reception data stored in the queue buffer is compared. The communication system according to claim 1, wherein data is discarded and only newly generated transmission or reception data is queued in the queue buffer. 3. The operation status transmitting means in the transmission side system or the operation status reception means in the reception side communication system, wherein when transmission or reception data occurs, the content of the transmission or reception data generated. The priority of the transmission or reception data generated from is determined, and the priority of the transmission or reception data generated and the priority of the transmission or reception data queued in the queue buffer without being transmitted or processed are determined. Compare,
The communication according to claim 1, wherein the transmission or reception data generated in the order of higher priority based on the comparison result or the transmission or reception data queued in the queue buffer is transmitted or received. system. 4. The transmission state reception means in the transmission side system or the operation state reception means in the reception side communication system, wherein when transmission or reception data is generated, the generated transmission or reception data or.
And the transmission or reception data generated based on the data content or data type of the transmission or reception data queued in the queue buffer without transmission or processing and / or the queue buffer without transmission or processing The priority of the transmission or reception data queued in the transmission or reception data and / or the processing contents are determined, and the transmission or reception data generated in accordance with the determination result and / or the transmission or reception data cannot be transmitted or processed and are queued in the queue buffer. The communication system according to claim 1, wherein the transmission or reception data is processed. 5. The communication system on the transmitting side comprises a sound output means or / and a simple display means, and outputs sound from the sound output means before data queuing, and / or an input information by the simple display means. To display in advance to the user that the user has input the operation information, and the display of the actual operation state is performed at the time when data is received by the display means of the communication system on the receiving side or thereafter. The communication system according to claim 1, wherein the communication system is implemented. 6. The communication system on the transmission side, the communication system on the reception side, and the communication means are included in the same computer, and the communication means performs data communication by a task inside the same computer. The communication system according to claim 1, wherein the communication is performed between software modules called the software modules. 7. The communication system on the transmitting side and the communication system on the receiving side are included in different computers, respectively, and the communication means is a network connecting the different computers, and the communication means includes The communication system according to claim 1, wherein the communication is performed between the software modules called tasks between the different computers via the network.