JP2000041052A - Radio communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a data communication of extremely good quality without repeating any unnecessary communication, by deciding the capacity and attribute of data to be sent out and selecting the transmission format most suitable to the data to be sent, and transmitting and receiving the data by using the most suitable transmission format. SOLUTION: A data terminal is connected to a radio station 1 through a data cable. The radio station 1 is equipped with a data analyzing means 7 which analyzes the size and attribute of data inputted from the data terminal and selects the transmission line which is most suitable to the data according to the analysis result of the data analyzing means 7. The data terminal sends and receives the data through the selected optimum transmission line. When the data are transmitted from the data terminal to another data terminal, the data terminal inputs the data to the radio station 1 through the data cable. The data analyzing means 7 analyzes the size and property of the data inputted to the radio station 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a radio communication system suitable for use in, for example, MCA radio.

[0002]

2. Description of the Related Art Conventionally, control signals are exchanged between wireless stations to which data terminals are connected, and one of a plurality of transmission paths (wireless lines) that can use a plurality of transmission modes is selected. 2. Description of the Related Art A wireless communication system that establishes a transmission path is known.

[0003]

By the way, in this type of wireless communication system, usually, the transmission path is often specified on the application side of the data terminal, but when the data terminal is shared between different wireless communication systems. Also, when different types of data are communicated with the same data terminal, it is not always possible to select the optimal transmission path, causing problems in data reliability and repeating unnecessary communication. There's a problem. Accordingly, the present invention has been made in view of such circumstances, and provides a wireless communication system capable of performing extremely high-quality data communication without causing a problem in data reliability and repeating unnecessary communication. It is intended to be.

[0004]

In order to achieve the above object, according to the first aspect of the present invention, a control signal is exchanged between wireless stations having data terminals, and one of a plurality of transmission modes is selected. A transmission means for determining a capacity of data to be transmitted and an attribute thereof, and a transmission mode most suitable for the data to be transmitted based on a result determined by the determination means. And communication means for transmitting and receiving data using the optimum transmission mode selected by the selection means.

According to the second aspect of the present invention, the selecting means selects one of a plurality of transmission modes including a plurality of channel modes and communication modes, and selects the selected transmission mode. In this case, a channel mode and a communication mode for realizing are provided.

According to the third aspect of the present invention, the selecting means changes a transmission mode to be selected according to a traffic situation.

[0007] Further, claim 4 is dependent on claim 1 above.
According to the invention described in (1), the selecting unit changes the type of transmission mode to be selected by using any of speed information, received electric field information, or position search information of a mobile body equipped with the wireless station. It is characterized by.

According to the present invention, data is transmitted / received in a transmission form most suitable for data transmission based on the capacity of data to be transmitted and its attribute, so that there is a problem in data reliability or unnecessary use of data. Extremely high quality data communication is possible without repeating communication.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. First, FIG. 1 is a diagram illustrating a schematic configuration of a wireless communication system according to an embodiment.
In the figure, reference numeral 1 denotes a data terminal, which is connected to the wireless station 1 via a data cable 11. Radio station 1
Is a data analysis means 7 for analyzing the size and properties of data input from the data terminal 1 as shown in FIG.
A transmission path selecting means 8 for selecting a transmission path most suitable for the data based on the analysis result of the data analysis means 7;
Communication means 9 for transmitting and receiving data via the selected optimum transmission path (wireless line). In addition, the radio line referred to here is a bidirectional, as shown in FIG. 3 and FIG.
It refers to one composed of a plurality of transmission paths such as unidirectional, composite path, multipath, and packet.

In the wireless communication system having such a configuration, when data is transmitted from the data terminal 1 to the data terminal 2, the data is input to the wireless station 1 via the data cable 11 at the data terminal 1. . The data input to the wireless station 1 is analyzed by the data analysis means 7 for its size and properties. Here, the size of the data is determined based on the configuration of the communication path shown in FIGS. 3 and 4, while the property is determined based on the use of the data. For example, when sending 3 kbit data including the order information of the article, according to the flowchart of FIG. 5, it is analyzed as “most important information + medium capacity”.

That is, the data analysis means 7 determines the size of data to be transmitted according to the flow shown in FIG. Specifically, first, in step S1, 100 bits
It is determined whether or not the data is less than or equal to 100 bits. If the data is less than or equal to 100 bits, the process proceeds to step S2, and it is determined whether or not the attribute of the data is information related to ordering. And
If the information is related to ordering, the data is determined to be “most important + small capacity”, and if the information is not related to ordering, the data is determined to be “important + small capacity”.

On the other hand, if it exceeds 100 bits, the process proceeds to step S3, and it is determined whether or not it is 1 Kbit or more. If it is 1 kbit or less, the process proceeds to step S4, and it is determined whether or not the data to be transmitted is an image. If it is not an image, the data is determined to be “general + medium capacity”. On the other hand, if it is an image, the process proceeds to the next step S5, and it is determined whether or not the information is related to ordering. If the information is related to ordering, it is determined as “most important + medium capacity”. Otherwise, it is determined as “important + medium capacity”. If it exceeds 1 kbit, the process proceeds to step S6, where it is determined whether or not the image is an image.
Is determined to be "large capacity".

When the size (capacity) of data to be transmitted and its attributes are analyzed in this way, the transmission path selecting means 41 selects an optimum transmission path based on the analysis result. As in the above example, when the analysis is performed as “most important information + medium capacity”, the bidirectional (duplex) traffic channel TC is selected as the transmission path according to the selection pattern shown in FIG. After that, the wireless station 1 transmits data to the wireless station 2 using the selected transmission path. This makes it possible to select the optimal transmission path for the amount and nature of the data to be transmitted, as in the past, causing problems in data reliability and repeating unnecessary communication. Without this, extremely high quality data communication becomes possible.

According to the selection pattern shown in FIG. 5, one-way (simplex) user packet channel UPC is used for "important + small capacity", and bidirectional (duplex) is used for "most important + small capacity". Traffic channel TC is a "general + medium capacity" one-way (simplex) user packet channel UPC
However, one-way (simplex) traffic channel TC is used for “important + medium capacity”, multiplexed (two-slot) traffic channel TC is used for “general + large capacity”, and one-way (simple) is used for “important + large capacity”. Traffic channel TC is selected.

Next, an embodiment in which the present invention is implemented in an MCA radio system will be described with reference to FIGS. In this system, as shown in FIG. 6, wireless stations 1 to which the data terminals 1 are connected exchange data under the control of the MCA control station. In such a system, as shown in FIGS. 7 and 8, a traffic channel TC, a user packet channel UPC, and a high-speed associated channel FAC are prepared as data transmission paths. Among them, the traffic channel TC and the user packet channel UP
C has simplex, duplex, and simplex 2-slot communication modes, and the presence or absence of error correction can be selected.

The user packet channel UPC includes a type using a common access channel CAC and a type using a user individual channel USC. M
A special feature of the CA wireless system is that the use of the lines and functions is regulated by the use state of the wireless lines and the external environment. Therefore, in this embodiment, the method of selecting a transmission path according to the nature of data is the same as the previous embodiment, but if there is a transmission path that cannot be used due to traffic conditions, the function of switching to the next candidate and transmitting Is added to the transmission path selecting means 71 (see FIG. 9) having When the wireless station 1 is mounted on a mobile body, as shown in FIGS.
A function of selecting the type of transmission path and the number of repetitions by using speed information, reception electric field information, position search information, and the like of the vehicle on which the wireless station 1 is mounted. Is also good.

As described above, according to the present invention, an optimum transmission path is selected in accordance with the capacity of data to be transmitted and its attribute (property). Thus, extremely high quality data communication can be performed without repeating unnecessary communication. In addition, since it is no longer necessary to be aware of a communication protocol that has to be considered in a data communication application in the related art, troubles caused by the application can be avoided.

[0018]

According to the present invention, data transmission / reception is performed in a transmission mode most suitable for data transmission based on the capacity of data to be transmitted and its attribute, thereby causing a problem in data reliability. Without repeating unnecessary communication.
Extremely high quality data communication can be performed.

[Brief description of the drawings]

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

FIG. 2 is a block diagram illustrating a configuration of a wireless station 1.

FIG. 3 is a diagram for explaining various channel forms and communication forms forming a transmission path.

FIG. 4 is a diagram (continuation of FIG. 3) for describing various channel forms and communication forms forming a transmission path.

FIG. 5 is a flowchart illustrating an operation according to the embodiment.

FIG. 6 is a diagram illustrating a configuration of an example.

FIG. 7 is a diagram for explaining a channel mode and a communication mode in the embodiment.

FIG. 8 is a diagram (continuation of FIG. 7) for describing a channel mode and a communication mode in the embodiment.

FIG. 9 is a diagram for explaining a transmission path selection unit 71;

FIG. 10 is a block diagram illustrating a configuration of a wireless station 1 according to another embodiment.

FIG. 11 is a diagram for explaining a transmission path selection unit 91.

[Explanation of symbols]

 1, 2 wireless station 4, 5 data terminal 7 data analysis means 8 transmission path selection means 9 communication means 11 data cable

Claims (4)

[Claims] 1. A system for transmitting and receiving a control signal between wireless stations having data terminals and selecting one of a plurality of transmission modes to establish a transmission path. Discriminating means for discriminating the attribute; selecting means for selecting a transmission form most suitable for the data to be transmitted based on a result discriminated by the discriminating means; and transmitting and receiving data in the optimum transmission form selected by the selecting means. A wireless communication system comprising communication means. 2. The communication apparatus according to claim 1, wherein the selection unit selects one of a plurality of transmission modes including a plurality of channel modes and communication modes, and indicates a channel mode and a communication mode for realizing the selected transmission mode. The wireless communication system according to claim 1. 3. The wireless communication system according to claim 1, wherein said selecting means changes a transmission mode to be selected according to a traffic situation. 4. The method according to claim 1, wherein the selecting unit changes the type of transmission mode to be selected by using any one of speed information, received electric field information, and position search information of a mobile body equipped with the wireless station. The wireless communication system according to claim 1, wherein