JPS60140937A - Selective calling receiver - Google Patents

Abstract

PURPOSE:To add a message information service to a selective calling service by handling numerical information in message information as one block with a pure binary code or the like and treating the content specifying ''action'' and ''object'' at a block of a specific code so as to eliminate remarkable effect on a subscriber capacity. CONSTITUTION:A part A is an address signal to call a subscriber and a kind of a cyclic code. A part B is a message signal and consists of BCH (63, 46) codes being a kind of the cyclic code the same as the address signal. In the architecture of the codes, 6-bit in the information bit (46-bit) is assigned to a specific code specifying ''action'', other 6-bit is assigned to a specific code specifying ''object'' and the remaining 34-bit is assigned as numeric information up to 10 digits maximum. When a message signal is received in succession to an individual selection call signal, the content corresponding to the received specific code is read from a read only memory and displayed on a display device together with the numeric information received successively.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a selective call receiver capable of receiving message information.

(1) In recent years, the progress of integrated technology has been remarkable, and as a result, the demand for multi-functionality in wireless individual paging services has increased, and with the development of digital signal technology, it has become possible to not only identify two individual selection signals but also receive and process message signals. Selective call receivers with display functions are being developed.

By the way, if a message information service is added to the 9-selective calling service, the length of the restricted signal per subscriber will increase, leading to a slight reduction in subscriber capacity.

Therefore, the signal length of the message information needs to be as short as possible without interfering with the information. However, in the conventional selective calling receiver with a display function, a BCD code is used as this signal.

It is designed to display 10 digits.

It has the drawback of poor signal efficiency, such as being able to specify only 16 types such as numbers, and requiring 40 bits to send 10-digit information. When this system is extended to character transmission, it is possible to transmit 7 characters per character using a general ASC code.
bits are required, and the signal efficiency is increasingly degraded.

0 A possible method is to configure it using a predetermined code. As a method using this method, “
Individual selective call receiver with display; Patent application 1984-140442
There is a method described in J, but in the signaling system of this system, a specific code designation is applied to each numeric designation, so when transmitting numeric information, it is not versatile. However, the length of the constraint signal increases, which is contrary to the initial purpose.

In other words, a user can enter a series of numbers, such as a frequently used telephone number, in a P-RO that corresponds to a certain code.
Systems that require users to write in M are often inconvenient for users who are not targeted only at a specific group of people, such as sales people.

The object of the invention is therefore to eliminate the above-mentioned drawbacks.

It is an object of the present invention to provide a selective calling receiver capable of receiving message information and capable of suppressing the number of occupied bits per subscriber as a signaling system and increasing subscriber capacity.

According to the present invention, in a selective calling receiver that receives two individual selective calling signals and a message-zo signal, a specific code consisting of one or more predetermined code blocks and numerical information consisting of a block that can be specified collectively. and a read-only memory in which predetermined contents corresponding to each of the specific codes are written, and when a message signal is received following the individual selection calling signal, the message signal is configured by A selective call receiver capable of receiving message information, characterized in that the content corresponding to the code is read from the read-only memory and displayed on the display together with the subsequently received numerical information. can get.

Next, a selective call receiver according to the present invention will be described in detail with reference to the drawings.

First, before explaining the embodiments, an outline of how to handle message information applied to the present invention will be described. Among the message information, numerical information is handled as one block. For the specific content of the numerical information,
It is necessary to use a specific code to maintain versatility while reducing the length of the constraint signal as much as possible. There are two possible ways to handle it. In other words, numerical information is stored in BCD.
There is a difference between how to handle it with code and how to handle it with pure binary code. Among these, pure binary codes can shorten the signal length. That's one example.

When using a BCD code, the number of bits required for each code when sending 10-digit numerical information is:

(4 pits)/(1 digit) x lO (digit) = 40 bits, when using pure binary code.

10 #2, or 34 bits. As is clear from the above example, when transmitting 10-digit numerical information, the 6-bit signal length can be reduced by using a pure binary code than by using a BCD code.

Regarding the specific code that specifies the content of message information (5), the required content differs between users, so users can freely and selectively write and use the content corresponding to a specific code from the beginning. By making it possible to do this, it is only necessary to prepare a limited number of specific codes. This not only shortens the signal length but also provides advantages such as ease of operation for the person calling the owner of the pager (selective calling receiver) because there are fewer selections to make. That is.

For example, each user can handle the same specific code as shown in Table 1 (police related) and Table 2 (sales related) below.

(6) Table 2 From this, it seems that about 64 types of specific codes are sufficient for daily work. It handles a series of 10-digit numerical information in pure binary.

The number of information bits required to send a message using the aforementioned specific code consisting of 6 bits may be 40 bits.

Additionally, special users may wish to be able to specify two names, locations, etc. At this time, for service providers, if the number of subscribers to such a service is limited, it may be possible to provide a more convenient message information service by slightly increasing the length of the constraint signal per subscriber. .

One possible method to satisfy this requirement is to configure the information bits of the signal by two or more groups of specific codes and numerical information blocks. In this case, as shown in Table 3, the same specific code can have different contents depending on the group, and as a result, a large amount of flexible information can be realized with a short signal length.

FIG. 1 is a block diagram showing the configuration of an embodiment according to the present invention. In this example, a series of numerical information is
It is handled as one block and is suitable for receiving a message signal composed of one or more specific codes that define the corresponding action or target. The signal structure per subscriber transmitted from the base station is formed as shown in FIG. Part A in the figure is an address signal for calling a subscriber, and is a type of cyclic code capable of error detection and error correction. The B part is composed of a BCI ((31, 16) code. In addition, the B part is a message signal. In this embodiment, it is composed of a BCH (63, 46) code, which is a type of cyclic code similar to the address signal. As shown in Figure 3, these code structures are such that 6 bits of the information bits (46 bits) are used as a specific code that specifies the ``behavior,'' and the other 6 bits are used to specify the ``object.'' to a specific code.

The remaining 34 bits are allocated for numerical information of up to 10 digits.

Here, referring to FIG. 1, the signal received by the antenna 10, that is, the carrier wave as shown in FIG. , where it is demodulated and then input to the decoding/control circuit 12. This decoding/control circuit 12 decodes the input signal, and when it is confirmed that the data in the P-ROM 14 in which the subscriber's calling number is written matches the input signal's individually selected calling signal, the decoding/control circuit ( 9) Step 12 moves on to detecting the message signal. The message information bits decoded in this way are stored in the RAM 13, and the message information bits are transmitted to the buffer 17 and displayed on the alarm horn, vibrator, etc. to indicate that there has been a call.
From the P-ROM 15 in which the stipulated contents of ``action'' and ``object'' are written in ASC code.

Information corresponding to the specific code of the above-mentioned received data is guided to the character generator 19, and its output is displayed on the display 21 via the drive circuit 20.

Remaining days below (10) Table 4 Table 5 FIG. 4 shows a received signal according to the above operation example.

The content displayed on the 2-display unit 21 can be seen by comparing Table 4 showing the specified content of the action and Table 5 showing the specified content of the target.

``Please contact the following 2 Head Office, 1235678409''
become that way.

In the above embodiment, the display on the two displays 21 adopts a scanning method, and the limited number of digits (16 digits in this example) is effectively utilized, and the display is performed for a certain predetermined period of time 1, for example, about 8 seconds. It is set to be automatically deleted. The character scanning time may be selected to be about 0.5 seconds, for example, as long as the content can be correctly recognized. Then, the pager user uses the switch 16I/C to input the decoding/control circuit 1.
2 and read out the received contents at any time.

That is, the decoding/control circuit 12 reads out the message data received and held in the RAM 13 in response to a trigger from the switch 16. Then, the information corresponding to the specific code of the data is read from the P-ROM 15, and is sent from the character generator 19 via the drive circuit 20 onto the display 21 along with the numerical information converted into an ASC code by the decoding/control circuit 12. Display memory information.

As is clear from the above description, according to the present invention, numerical information in message information is handled as one block using pure binary code or the like.

Moreover, by handling the content that defines the "action" and "object" in response to it using specific code blocks, it is possible to add a message information service to the one-select call service without significantly affecting subscriber capacity. can.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment according to the present invention;
FIG. 2 is a schematic block diagram of a received signal, FIG. 3 is a block diagram of information bits of a message signal, and FIG. 4 is a block diagram of a received signal whose carrier wave is modulated according to an example of the message signal. In the figure, 10 is an antenna, 11 is a wireless receiving section, and 12
13 is a decoding/control circuit, 14 is a RAM. 15 is a P-ROM, 16 is a switch, and 17 is a buffer. (13) 18 is an alarm horn, 19 is a character generator, 20 is a drive circuit, and 21 is a display. (14)

Claims (1)

[Scope of Claims] 1. In a selective calling receiver that receives an individual selective calling signal and a message signal, a specific code consisting of one or more predetermined code blocks and numerical information consisting of blocks that can be collectively designated. a read-only memory embedded therein; upon receipt of a message signal subsequent to said individual selection ringing signal, content corresponding to the particular code received is read from said read-only memory; A selective call receiver, characterized in that it is displayed on a display unit along with the following.