JPH05122132A - Broadcasting paging system - Google Patents

Abstract

PURPOSE:To simultaneously call many calling terminal equipments in a radio calling signal system. CONSTITUTION:An extension frame 5 which is a common frame to plural calling terminals 0 to 7 and is constituted of 2 code words is formed in a batch in a radio call signal format 1. At the time of receiving two continuous address code words 14 in the frame 5, a calling terminal equipment extracts eighteen address bits 17 in the 1st address code word 15 and eighteen address bits 18 in the 2nd address code word 16 and forms an address to be converted into a ternary code. Then 2-bit data on the same bit position are converted into a ternary code expressed by any one of values '0', '1', 'X' (both of '0' and '1' are available). An address 21 obtained after conversion to the ternary code is compared with the address of its own calling terminal and when all bits coincide with the bits of the compared address, a called output is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paging system, and more particularly to a broadcast paging system.

[0002]

2. Description of the Related Art In the conventional broadcast paging system, for example, the POCSAG signal system (CCIRRPC NO.
As shown in 1), it is composed of a preamble for establishing bit synchronization and one or a plurality of batches. The contents of the batch are 8 frames in which a frame synchronization code and call information (call number or message) are stored. The frame consists of # 0 frame, # 1 frame, # 2 frame, # 3 frame, # 4 frame, # 5 frame, # 6 frame and # 7 frame, and the calling terminal has a 21-bit address assigned to each. The lower 3 bits are classified into 8 groups. The calling terminal of each group received a frame corresponding to its own group, and determined that it was called by matching the 18-bit address in which one bit is a binary code and the ROM data of its own address. Therefore, in order to broadcast a large number of calling terminals, an address code word including an 18-bit address is put in a frame corresponding to each calling terminal for all calling terminals that call at the same time.

[0003]

In the conventional broadcast paging system described above, one address codeword is composed of one codeword, and one address bit is either 0 or 1 in the calling terminal. Since it is a binary code, there is a disadvantage that only one calling terminal can be called per address codeword, and when calling a plurality of calling terminals, it must be performed a plurality of times.

[0004]

According to the broadcast paging method of the present invention, a wireless signal sequence transmitted on a wireless line between a wireless transmitter of a paging system and a calling terminal includes a preamble and one or more subsequent ones. It is composed of batches, and the content of this batch has a sync code at the beginning, contains n frames (n is a natural number), and the calling terminal address is one or more predetermined ones in this calling terminal address. In a radio paging signal system in which a binary code sequence is stored in a frame of a number designated by bits, an extension frame composed of a plurality of code words is provided in the radio signal sequence, and all paging terminals in the system , Receiving the data of the extension frame, converting a plurality of codewords of the received extension frame into a multi-level code, and binary code of the codeword A forced structure regarded as self-address bits that became the outer code.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a diagram for explaining a battery saving operation by a broadcast paging system according to an embodiment of the present invention.

The content of the radio ringing signal format 1 transmitted from the radio transmitter to a plurality of calling terminals is composed of a preamble 2 for establishing bit synchronization and one or a plurality of batches 3. The contents of the batch 3 are the frame synchronization code SC4, the extended frame 5 which is a newly added frame in the present invention, and eight frames in which call information (call number or message) is stored, that is, # 0 frame 6, # 1 frame 7, It is composed of # 2 frame 8, # 3 frame 9, # 4 frame 10, # 5 frame 11, # 6 frame 12 and # 7 frame 13.

The call terminals # 0 to # 7 are classified into eight groups by the lower 3 bits of the 21-bit address assigned to each call terminal, and the battery saving of the call terminals of each group is turned on / off. The state is associated with the wireless ringing signal format. When the battery saving is in the ON state, the calling terminal is in the unreceivable state, and when the battery saving is in the OFF state, the calling terminal is in the receivable state.

Next, the battery saving operation of the # 0 to # 7 calling terminals will be described. # 0 to # 7 The calling terminal periodically searches the preamble 2 with the battery saving turned off, and after detecting the preamble 2, the battery saving is turned off and the frame synchronization is performed by the SC4. 7 The extension frame 5, which is a frame common to the calling terminals, is received. The # 0 calling terminal subsequently turns on the battery saving after receiving the frame # 0 frame 6 of its own group.

The # 1 to # 7 calling terminals use the extended frame 5
After receiving the message, the battery saving is turned on once to enter the frame waiting state of the own group. The # 1 calling terminal is # 1 frame 7, and the # 2 frame calling terminal is # 2
Frame 8, # 3 calling terminal # 3 frame 9, # 4 calling terminal # 4 frame 10, # 5 calling terminal # 5 frame 11, # 6 calling terminal # 6 frame 12, # 7
When the calling terminal receives the # 7 frame 14, the battery saving is turned off again to receive its own frame, and after receiving the frame, the battery saving is turned on again.

FIG. 2 shows three consecutive address bits of two consecutive address codewords 14 in the extension frame 5 of FIG.
It is a figure for demonstrating the flow at the time of converting into the 21-bit address 22 including a value code. Two consecutive address codewords 14 in the extension frame 5 are converted into a first address codeword 15 and a second address codeword 16 respectively.
And The calling terminal combines the 18 address bits 17 in the first address codeword and the 18 address bits 18 in the second address codeword by receiving two consecutive address codewords 14. The result is the address 20 before conversion to the ternary code.
Is.

Then, 18 in the first address code word
Address bit 17 and 1 in the second address codeword
A pattern of 1 bit each, which is indicated by the same bit position of the 8 address bits 18 and a total of 2 bits, is converted into a ternary code based on FIG. What is generated as a result is the address 21 after conversion to the ternary code. Further, since the extension frame 5 is received by all calling terminals, it is actually called 21
The lower 3 bits of the bit address 22 may be either 0 or 1.

In the present embodiment, 2 address codewords are 8
× 2 ⁿ (n is an integer of 0 or more, and the total number of “X” s in the address 21 after conversion into the ternary code: n = 1 in this embodiment)
It is possible to call multiple calling terminals in a broadcast manner. First as shown in FIG.
18 address bits in address codeword 17, second
If 18 address bits 18 in the address codeword are set, 16 to 31 (10
It is possible to call up to 16 call terminals at the same time. If a larger number of calling terminals are called at the same time, the number of bits of "X" which can be 0 or 1 may be increased.

FIG. 4 is a block diagram of a called detection circuit of the calling terminal for implementing FIG.

The received address data 23 is input to the address data (serial) distribution circuit 24 as serial data. The address data (serial) distribution circuit 24 outputs the address data of the first address codeword of its own frame or the extension frame to the serial / parallel conversion circuit 25, and outputs the address data of the second address codeword of the extension frame to the serial / parallel. Conversion circuit 26
Output to.

Bits 1-1 to 18-1 output from the serial / parallel conversion circuit 25 and bits 1-2 to 18- output from the serial / parallel conversion circuit 26.
2 is input to the 1-bit data holding circuit 28. The held data 1-1 bit 29 and 1-2 bit 30 are both input signals to the 0 or 1 detection circuit 31 and the "X" (0 or 1) detection circuit 32.

First, the 0 or 1 detection circuit will be described. This circuit is an input signal 1-1 when the own frame reception signal 27 is active, that is, when the own frame reception signal 27 is received.
Output bits as they are. Further, when the own frame reception signal 27 is inactive, that is, when the extension frame is received, the 1-1 bit 29 and the 1-2 bit 30 according to FIG.
When the 2-bit pattern of “0” is “00”, the value of “0” is output as the 0 or 1 detection signal 33, and when it is “11”, the value of “1” is output as the 0 or 1 detection signal 33. When the 2-bit pattern of 1-1 bit 29 and 1-2 bit 30 is "01" or "10", the "X" (which may be 0 or 1) detection circuit described below becomes active, so this circuit The 0 or 1 detection signal 33, which is the output of, becomes inactive.

Next, the "X" (0 or 1) detection circuit will be described. This circuit becomes inactive when the own frame reception display signal 27 is active, that is, when the own frame is received, and the above-mentioned 0 or 1 detection circuit 31 becomes active. When the own frame reception display signal 27 is inactive, that is, when an extended frame is received, according to FIG. 3, when the 2-bit pattern of 1-1 bit 29 and 1-2 bit 30 is "01" or "10", "X" (even 0) 1) may be activated).

Then, a 0 or 1 detection signal 33, "X"
The relationship between the detection signal 34 (which may be 0 or 1) and the 1-bit coincidence detection signal will be described.

As described in the 0 or 1 detection circuit 31 and the "X" (which may be 0 or 1) detection circuit 32, a 2-bit pattern of 1-1 bit 29 and 1-2 bit 30 at the time of receiving an extended frame. 0 or 1 except for "01" and "10"
The detection circuit 31 becomes active, the 0 or 1 detection signal 33 becomes active, "0" or "1" is stored in the 1-bit register 35, and the own address of the calling terminal is stored by the comparison circuit 37 in bit correspondence. Compared with the corresponding 1-bit ROM data (ROM) 36,
When they match, the 1-bit match detection signal 38 becomes active. Also, the 1-1 bit 29 when the extended frame is received
And a 1-2 bit 30 2-bit pattern is “01”,
When it is "10", the "X" (0 or 1) detection circuit 32 becomes active, and the "X" (0 or 1) detection signal becomes active, and the comparison circuit 37 with 1-bit ROM data is ignored. To forcibly activate the 1-bit match detection signal 38.

The above is a description of one address bit. When the 1-bit match detection signal of all address bits (18 bits) becomes active, the called detection signal 39 becomes active and activates other circuits.

[0022]

As described above, according to the present invention, an extension frame, which is a frame commonly received by all calling terminals, is used in one batch, and each 1 bit of an address contains a value that may be 0 or 1. By assigning a value code, it is possible to call a large number of calling terminals with two address code words, and it is possible to provide a broadcast paging method that effectively uses wireless resources.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a battery saving operation of a calling terminal according to a wireless calling signal format and a broadcast paging method according to an embodiment of the present invention.

FIG. 2 is a diagram for explaining a flow of conversion of address bits of an extension frame in FIG. 1 into a ternary code.

FIG. 3 is a diagram showing conversion to a ternary code.

FIG. 4 is a block diagram of a called detection circuit of a calling terminal when implementing FIG.

[Explanation of symbols]

1 Radio paging signal format 2 Preamble 3 Batch 4 SC 5 Extended frame 6 # 0 frame 7 # 1 frame 8 # 2 frame 9 # 3 frame 10 # 4 frame 11 # 5 frame 12 # 6 frame 13 # 7 frame 14 2 consecutive One address codeword 15 first address codeword 16 second address codeword 17 18 address bits in first address codeword 18 18 address bits in second address codeword 19 1 bit position in codeword 20 3 values Address before conversion into code 21 Address after conversion into ternary code 22 21-bit address that is actually called 23 Address data (serial) 24 Address data (serial) distribution circuit 25, 26 Serial / parallel conversion circuit 27 Self Frame Reception signal 28 28 1-bit data holding circuit 29 1-1 bit 30 1-2 bit 31 0 or 1 detection circuit 32 “X” (may be 0 or 1) detection circuit 33 0 or 1 detection signal 34 “X” ( Either 0 or 1) Detection signal 35 1-bit register 36 1-bit ROM data (ROM) 37 Comparison circuit (COMP) 38 1-bit match detection signal 39 Called detection signal

Claims (1)

[Claims] 1. A wireless signal train transmitted on a wireless line between a wireless transmitter of a paging system and a calling terminal is composed of a preamble and one or more subsequent batches.
And the content of this batch has a sync code at the beginning,
Number of frames (n is a natural number), and the calling terminal address is stored as a binary code string in a frame having a number designated by one or more predetermined bits in the calling terminal address. In the radio paging system, an extension frame composed of a plurality of code words is provided in the radio signal sequence, and all the calling terminals in the system receive the data of the extension frame, and a plurality of codes of the received extension frame. A broadcast paging system characterized in that a word is converted into a multi-level code, and a bit of the code word other than a binary code is forcibly regarded as its own address.