JPH0430770B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field to which the invention pertains) The present invention relates to a simple wireless data communication system for selective reception when data is transmitted in a broadcast manner.

(Prior Art) Conventionally, there are weather facsimiles and the like as services for broadcasting various data, but these services receive all data and do not selectively receive it. In addition, there is a pager service with a display that does not broadcast but has a selective reception function, but this sends out a terminal number and data as a pair, and only the terminal that matches the terminal number continues to send out the data. However, in order to use this method for broadcasting services, it is necessary to send out the number of each terminal in order for one data to be received by multiple terminals. The disadvantage is that when the number of calls increases, the traffic for calls becomes enormous. In addition, in order to solve this problem, there is a plan to make the terminal number variable and match the terminal number to the terminal number that is added to the information that you want to receive. If you set that number, you can receive it at any time, but it has the disadvantage that you cannot allow only specific people to receive it.

(Objective of the Invention) In order to solve these drawbacks, the present invention sets a different code for each wireless terminal, and the wireless terminal uses the code to calculate a fixed calculation formula or table index determined for each wireless terminal. , into the same selection code so that data transmitted from a wireless transmitting station under one selection code can be received.The drawings will be described in detail below.

(Structure and operation of the invention) FIG. 1 is a block diagram showing the structure of an embodiment of the invention, in which 1 is a telephone, 2 is a subscriber line exchange, 3 is a control exchange, 4 is a receiver, and 5 is a telephone set. 1 is a talkie device, 6 is a central control unit, 7 is a memory, 8 is a data center, 9 is a wireless transmitting station, and 10 is a wireless terminal.

Figure 2 is a diagram showing the correspondence between terminal numbers and conversion patterns, Figure 3 is an explanatory diagram of conversion patterns, Figure 4 is an explanatory diagram showing the correspondence between data types and code numbers, and Figure 5 is an example of a transmission format. FIG.

Hereinafter, as an example, a method of receiving only necessary stocks when stock information is being sent will be described.

A subscriber who wishes to receive the service sets up a line from the telephone 1 to the control exchange 3 via the subscriber line exchange 2. The line setting method is IXY
Possible methods include dialing a special subscriber number, and dialing a special subscriber number.

When the line is set, the control exchange 3 connects the receiver 4 and the talkie device 5. A service subscriber transfers his or her own wireless terminal 1 from telephone 1 to
0 number, for example 123-4567, and the type of data you wish to receive, that is, the stock number, for example 001. The dialed digits are received by the receiver 4, and if necessary, the talkie device 5 sends the message "The brand you request is ○".
○Electricity...Your number is 123-4567. Please dial 0 if you agree. ” is transmitted. When a service subscriber dials 0, the central controller 6 of the control exchange 3 accesses the memory 7 and first accesses the memory corresponding to the terminal number and conversion pattern shown in FIG.
Extract conversion pattern A of 123-4567.

Next, access the data type 001 and code number correspondence table shown in Figure 4, and check the code 671235 for 001.
Extract.

Next, access the conversion pattern table shown in Figure 3, read the conversion pattern of A, and code 671235.
, 6 is 0, 7 is 9, 1 is 3, 2 is 6, 3 is 7,
Knowing that 5 is 8, the talkie device 5 sends out ``The selection code for ○○ electricity is 093678.''

When the service subscriber hears this, the wireless terminal 1
Set 093678 using the button attached to 0. The wireless terminal 10 has a conversion circuit that corresponds to conversion pattern A in advance, and when 093678 is input, this is converted.
671235 and is set to receive code 671235.

When the central control device 6 receives the current prices of various stocks from the data center 8, it transmits the information to the wireless transmitting station 9.
Then, the selection code and data are sent in the format shown in FIG. The wireless terminal 10 receives and displays data only for the selection code 671235 set in the terminal.

In addition, in the above explanation, an example was shown in which code conversion is performed using a conversion table, but the method is not limited to this, and a method of adding a certain constant or a method of converting using a predetermined calculation formula may also be applied. Furthermore, although the case where only one brand is received has been described, it is also possible to request information on multiple brands, have a memory in the terminal, receive multiple pieces of data, and switch between them for display.

(Effects) As explained above, according to the method of the present invention,
Even though the code set in each terminal is different, each terminal can receive the same selection code, so data can be sent to all terminals in common, making effective use of the wireless channel. Moreover, since only the subscriber who made the request can receive the requested data, it has advantages such as being able to charge according to the receivable data.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a diagram showing the correspondence between terminal numbers and conversion patterns used in the present invention, FIG. 3 is an explanatory diagram of conversion patterns, and FIG. 4 is an explanatory diagram showing the correspondence between data types and code numbers, and FIG. 5 is a diagram showing an example of a transmission format. 1... Telephone, 2... Subscriber line exchange, 3...
Control exchange, 4... Receiver, 5... Talkie device, 6... Central control unit, 7... Memory, 8...
Data center, 9... Wireless transmitting station, 10... Wireless terminal.

Claims (1)

[Claims] 1. In a simple wireless data communication system in which a transmitting station transmits various selection codes and data, and a wireless terminal receives and displays only the data of the selection code set in the terminal, Send the type of data you want and the wireless terminal number to the exchange, and the exchange creates a code to be set in the wireless terminal, which is different for each wireless terminal, from the type of data and the wireless terminal number, and sends it to the wireless terminal. When the above code is set at the wireless terminal, the wireless terminal converts the above code into a selection code corresponding to the type of data to be received using a conversion method that is predetermined for each wireless terminal, and then converts the code into a selection code corresponding to the type of data to be received. A simple wireless data communication method characterized by receiving only data of a selection code.