JPS60170342A - Signal transmitting method to selectively called receiving device - Google Patents

Abstract

PURPOSE:To make general calling and to send a common message to selectively called receiving devices having the same address, by putting the same address in the n-th batch and the message in and after the (n+1)-th batch. CONSTITUTION:When general calling is made, signals are transmitted by putting the same address A0 in all the eight frames of the n-th batch and message signals M1-M4 in and after the (n+1)-th batch. If the signal A0 is detected at the n-th batch irrespectively of the frame number, the operating timing of selectively called receiving devices is set so that they can receive the message signals M1- M4 in and after the (n+1) batch. Therefore, general calling and sending of the common message to a specific receiving device group having the same address signal A0 can be made.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a signal transmission method for a selective call receiving device.

Conventional configuration and its problems Figure 1 shows a POC8AG (Po5t Office Code
Standard Advisory
(xrou'p): Indicates a configuration using a signal called I-do.

In FIG. 1, the preamble signal is a repeating signal of 1 o 10 . . . indicating that signal transmission is started. The signal sent following the preamble signal is composed of batches, each batch consisting of a synchronization signal (SC) and eight frames, and one frame is made up of two code words. Each frame is numbered from +0 to +7-1, and the selective call receiving device has 8 frames corresponding to the above numbers.
divided into two groups. The code word is BCH
(31,21) code (Base-Chaudhur i
-Hocquenghem code, 31 is the code length,
The signal is composed of 32 bits including an even parity bit of K1 (21 represents the symbol length), and is classified into an address signal and a message signal.

Figure 2 shows the code structure of the address signal. In the figure, 1 is a recognition flag that identifies an address signal and a message signal, 2 is an address bit that forms an individual selective call number, and 3 is a code that identifies four types of signals using these two bits. Function bits assigning different codes to individuals, 4 is a parity check, and 5 is an even parity.

FIG. 3 shows the code structure of the message signal sent following the address signal. Unlike the address signal, the message signal has 20 bits out of 21 information bits assigned to message bit 6 constituting the message information.

Now, the operation of the selective call receiving apparatus that receives the aforementioned POC3AG code will be explained using FIG.

The selective call receiving device performs a receiving operation when receiving a synchronization signal (SC) and a frame to which its own group belongs. Also,
When it detects its own calling number, it determines whether or not a message signal is being sent following the address signal, and if so, the receiving operation continues until the message signal ends. In FIG. 4, frames Ai: O, Jii:
1 and A7, the receiving operation timing of the selective call receiving device belonging to A7 is shown. The broken line section shows an example of the operation when the user's own calling number is detected and a message signal is received.

However, with such conventional signal transmission methods, it is difficult to call a plurality of selective call receiving devices all at once or to send the same message.

OBJECTS OF THE INVENTION The present invention eliminates the drawbacks of the conventional examples described above, and provides a signal transmission method that makes it possible to call a specific group of selective call receiving devices or all selective call receiving devices, and to transmit the same message. This is what we are trying to provide.

Structure of the Invention In order to achieve the above object, the present invention puts the same address signal into the nth batch (n is any integer), and
By inserting a message signal after the +1st batch and transmitting the signal, it is possible to simultaneously call all selective call receiving devices having the same address signal and send a message even if they are in different groups.

DESCRIPTION OF EMBODIMENTS The configuration of an embodiment of the present invention will be described below with reference to the drawings. In Fig. 5, in the nth batch (n is an integer greater than or equal to 1), SC is a synchronization signal, 80 is a common address signal corresponding to a common address number, and M1 to M4 are n+1.
is the message signal in the second batch, POC3
In AG code signal transmission, when calling all at once, in the n-th batch, a circle is placed in the same address signal in all eight frames, and a message signal is placed in the (n+1)th and subsequent frames to transmit the signal. Figure 5 shows the frame ICO, llr
, 0 frame indicating the operation timing of the selective call receiving device that has stored 〇 to the address signal belonging to 1+magic 7! Regardless of whether the address signal A.

It becomes possible to simultaneously call a specific group of receiving devices with the same information and send a common message signal.

In the above-mentioned embodiment, both an individual number and a common address number for simultaneous reading are assigned in advance to a specific selective call receiving device that requires simultaneous calling in addition to individual calling.

Effects of the Invention According to the present invention, as explained in the above embodiment, the same address number (signal) is inserted and transmitted in each frame signal included in the same batch and corresponding to a plurality of groups, and the message When simultaneous transmission of multiple numbers is required, the code structure is such that a message signal is inserted following the batch containing the address number, so that selective call receiving devices belonging to different groups that have the same address signal can be called simultaneously. can be easily done and still send a common call message following the call.

Therefore, it is effective for transmitting weather forecasts, stock information, etc. all at once.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of the signal configuration of the POC3AG code, FIG. 2 is a diagram showing the code configuration of the individual selective calling number of the POC3AG code, and FIG. 3 is a diagram showing the code configuration of the mesocene signal of the POC3'AG code. FIG. 4 is a timing diagram of a receiving operation in a conventional signal transmission method, and FIG. 5 is a timing diagram of a receiving operation in a signal transmission method according to an embodiment of the present invention. 1...Synchronization signal (SC), 2...Address bit,
3: Function bit, 4: Parity check, 5: Even parity bit, 6: Message bit, 80: Same address signal. Name of agent: Patent attorney Toshio Nakao and 1 other person
2 Figure 3 Figure 4 Figure 5 +17

Claims (1)

[Claims] When making an individual call from among a group of selective call receiving devices that are divided into a plurality of groups and each having an individual number, a plurality of frame signals that correspond to the groups constituting one batch and follow a synchronization signal and the frame signal In order to perform individual paging for each group using a message signal sent subsequently to the group, and to simultaneously call a specific selective call receiving device in the group of selective call receiving devices, a call is made to the specific selective call receiving device. A common address number is assigned in addition to the individual calling number, and the base station inserts an address signal corresponding to the common address number into each frame of a given batch, and sends a common message. When transmission of a message is necessary, a message signal is added to the arbitrary batch and transmitted, thereby simultaneously calling specific selective call receiving devices.