JP2855769B2 - Individually selected call receiver with display function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application field] The present invention relates to an information receiver in an individual selective calling receiver with a character display function, and in particular, a numerical display type receiver using a POCSAG system for Code Format ( Numeric Display Pager) or character display receiver (Alphanumeric Display Pager)
The present invention relates to an information receiver that uses the information.

[Prior Art] The POCSAG system, which is a type of paging calling system, is an epoch-making system that can send not only individual selective calling but also numerical information or character information after calling.

[Problems to be Solved by the Invention] The above-mentioned conventional POCSAG method is very effective for a system mainly performing individual selection calling.

That is, the character information to be transmitted subsequently is transmitted after the individual selective calling is performed. However, if the same information is to be notified to a specific but large number of subscribers, even if the calling numbers of the subscribers to receive the information are unified to some extent, it is divided into a maximum of 8 groups.
If the subscribers to be informed are dispersed in all groups, there is a disadvantage that the subscriber number for calling and the information to be informed are repeated eight times.

Alternatively, if the call numbers are unified and all come to the same Group, individual call numbers are set every eight
The maximum subscription capacity of the CSAG method is 1/8, and the framing of unassigned groups in the POCSAG signal format
e has the disadvantage that the Idle Code-word is sent and the efficiency of the radio wave deteriorates.

[Means for Solving the Problems] In the receiver of the present invention, if the information received after the call number is determined to be character display information or special control information, the information is special control information. In the case of a predetermined code, the system recognizes that character display information to be displayed is sent in a certain procedure, and receives, stores, and displays the character display information according to the procedure.

With this function, a specific large number of subscribers to whom the same information is to be sent, even if they are divided into several groups, first send a certain calling number, and then immediately send a special control code.
Thus, the receiver is in a state of waiting for the character display information.
In turn, subscribers belonging to other groups also send the call number and the special control code. Thus, all the subscribers to whom the same information should be sent are in a state of waiting for the character display information. Thereafter, if the character display information is transmitted only once, all subscribers can receive the character display information.

Examples Next, the present invention will be described with reference to the drawings.

FIG. 1 is a basic configuration diagram of a receiver according to the present invention. The signal (radio wave) sent from the base is ANT (antenna) 1
And demodulated by the RX (FM receiver) 2. The output signal of the DISC (discrete circuit) 3 is a digital signal, which is decoded by a DEC (decoder unit) 4. If the received signal is “Address Codeword”, it is compared with the Pager ID recorded in the ROM (call number recording unit) 5. here
Multiple Pager IDs are recorded, and if any of these is matched, the “Massag
e Codeword ".

If this is the case, there is no “Massage Codeword” and
The Pager ID is not related to the information reception described in 4 below
In the case of the Address, the SP (speaker) 13 generates a ringing tone by interpreting the reception as Tone Only (called a calling operation).

Further, this receiver is basically designed to receive in a numerical display format (detailed operation description is shown in 5 below).
Therefore, the received "Massage Codeword" is sent to the CPU (Central Processing Unit) 6, where it is confirmed whether or not this information is a special control code. Is stored and displayed at the same time as the calling operation and the DISP (display unit) 10 in a numerical display format. If the meaning is unknown, the base station interprets it as sent in alphanumeric character display format, and has a function to forcibly change the format with MSW (external manual switch) 8,
This is performed using an A / N (type switching circuit) 9.

For the sake of convenience, this receiver is described in 3. Battery Sa below.
Battery Saving Mode II (BS
-II mode), that is, Address Codewords or Message
It has been described that Codewords can be received. SW (power supply control unit) 11 is also known as Battery Savi
Also called an ng circuit (Circuit), the receiver has three modes described in 3 below due to its function. That is,
The BS-I mode, the BS-II mode, and the BS-III mode.

2. Explanation of POCSAG method Next, POCSAG such as POCSAG Digital Paging Signal Format
The method will be described.

2.1 Signal Format The POCSAG signal format is composed of two parts, a) Preamble and b) Batch Structure, as shown in FIG.

a) Preamble is a receiver (individually selected paging receiver: Pager)
This signal is sent for bit synchronization.

b) Batch Structure is SC (Synchronization Codew)
Starting with 1 Codewords of the synchronization signal called ord), eight FRAMEs consisting of two Codewords are continued. Total
Consists of 17 Codewords. This Batch Structure continues until there are no more calls.

2.2 Types of Codewords 1 Codeword consists of 32 bits. Codeword has the following four types.

a) Synchronization Codeword b) Address Codewords c) Message Codewords d) Idle Codewords Next, the contents of each Codeword are shown in FIG.

FIG. 3A shows a) Synchronization Codeword.

Fig. 3 (2) shows b) Address Codewords and c) Message
Indicates the structure of Codeword. Bit Number1 (first bit) (also called Message Flag) is Address Codeword
Is "0" in the case of, and "1" in the case of Message Codeword. With this, Codeword sent from the base is Addres
s You can determine whether it is Codeword or Message Codeword. This Me
Following ssage Flag, Addres for Address Codeword
s bits is 18 bits, Function bits is 2 bits, then Pa
rity Checkbits is 10bits, and Even Parity is 1bit
This completes one Codeword of 32 bits in total. Also, M
essage Codeword is Message Flag followed by Message bit
Par is the same as when s is 20bits and then Address Codeword
The ity checkbits is 10 bits, and the Even Parity is 1 bit, which forms a Codeword of 32 bits in total. Fig. 3 (3)
Indicates Idle Codeword. This is used when there is no Address Codeword or Message Codeword.

2.3 Pager Identities Receiver-specific call numbers consist of 7 digits. The configuration is shown in FIG. 7 digit calling number (7Digits Identity)
Is represented by 21 bits if it is expressed in binary (Binary Conversion). Bits Number 19, 20, 21 are determined by the location of the Frame, that is, the number of the Frame (the transmission frame). Send. The 20th and 21st (# 20, 21) Function bits in the Address Codeword set four ring tones (A, B, C).
And D's Identity). Where Function bits
FIG. 5 shows the relationship between the function and Multi Functions. Remaining second
The second to 31st 10 bits are Parity Check bits formed from the first to 21st bits.
In addition, the last 32nd bi to 1st to 31st
Even Parity for ts.

2.4 Numeric Date Coding Method Numeric Date Coding Method
Will be described below. This method is 4bits and the numbers 0-9
And hyphen, emergency mark: Urgency Symbo
l Display "U", left parenthesis, right parenthesis, special symbol: * mark and space (Space).

This relationship is a Character Set based on Binary Coded Decimal (BCD) code, and is shown in FIG.

Next, FIG. 7 shows an example in which data is transmitted using the character set in a numeric display code system. In this example, the calling number (Pager ID) unique to the receiver belongs to Group2.
The transmission information (Data) is “01234567”.

To transmit 8 characters (8Characters) of this Data, 8Characters
acters x 4bits / Character = 32bits required, 1Messag
e Codeword is 20 × 2 =
Since 40> 32, two Message Codewords are required. In addition,
In this case, 40-32 = 8 bits of Message bits are left over, but this surplus is sent as Space.

2.5 Alpha-Numeric Date Coding Method Alpha-Numeric Date Coding Method
ding Method) is described below. This method uses 7bits
To display English letters, numbers and various symbols. This character string (Character Set) is shown in Fig. 8, which is SIO 7b
Uses the it coded Character Set. (ISO 646
Next, FIG. 9 shows an example of sending Data, which is character display information, using this code. In this example, the calling number (Pager ID) unique to the receiver belongs to Group α. The transmission information (Data) is “ABCDEfghi”. To transmit 10 characters (10characters) of this Data, 10characters × 7bits / ch
aracters = 70bits required, 1Message Codeword is Mes
Since sage Bits is 20, 20 × 4 = 80> 70, Message
Four Codewords are required. In this case, 80-70
= 10 bits of Message bits surplus, but this extra is used to form a Codeword by sending a special character "EOT".

Furthermore, the Message Data to be transmitted is large and one Ba
If it cannot be accommodated by tch, the next batch will be used to communicate. An example is shown in FIG. In this example, the Message Data “M3” transmitted to the subscriber (receiver: Pager) having “S3” which is the Pager ID belonging to Group 5 is 2
It spans one Batch (in the example, it covers 1st Batch and 2nd Batch).

3. Battery Saving Operation The receiver of the present invention employs the Battery Saving System in order to extend the life of the power supply battery, but is classified into the following three according to the operation mode.

(1) BS I: Preamble Search Mode (2) BS II: Self Address Search Mode (3) BS III: Message Data Search Mode Next, each mode will be described.

3.1 BS I: Preamble Search Mode This is an “AF” stag with a certain period as shown in 2 and 3 in Fig. 11.
Repeat the power supply ON / OFF of e and “RF” stage. When both “AF” stage and “RF” stage are “ON”, “Pream
ble signal ". If it cannot be captured, repeat this ON / OFF. By the way, in the case of the example," AF "sta
ge power supply “ON”, that is, Battery Saving “OFF” time is 65 ms, and power supply “OFF”, that is, Batt
The time of ery Saving “ON” is 997.5msec. further,
The battery saving “OFF” and “ON” times of the “RF” stage are 30 ms and 1032.5 ms, respectively. That is,
“ON” / “OFF” is repeated with a cycle of 1062.5 msec.

Above is Battery Saving operation (Battery Saving Opera
“Preamble Search Mod”
e "operation.

If Battery Saving is “OFF” here,
If the signal can be captured, the receiver
Enter (Self Address Search) Mode.

3.2 BS II (Self Address Search Mode) When the preamble signal is captured, the Battery Saving “O
FF "continues and continues until the SC (Synchronization Codeword) is confirmed. After confirming the SC, Battery Saving becomes" ON ", but the FRA of the group to which the calling number in the ROM 5 of the receiver belongs.
Battery Saving “OFF”, a time equivalent to ME, Powe
r "ON", go to search for Address Codeword. Fig. 12 shows an example. In this example, the receiver (Pager) is Group6
Belongs to Consider the first Codeword of Frame5, if this is an Address Codeword but not its own calling number (Slef Address), or Message Codewo
If it is rd, consider the next Codeword. In the example, the following Co
Since deword is not Self Address, Battery Saving again
It becomes “ON” and continues until the next SC.

The above is Battery Saving operation (Battery Saving Operati
on) One of the BS IIs, “Self Address Search M
ode ".

Next, FIG. 13 shows an example in which the self-call number (Self Address) is captured. In this example, the second of Frame5 is its own calling number (Self Address), and thereafter Message Data is sent. In this example, since the Address Codeword has been sent following the Message Data, the receiver determines that the Message Data has been completed, and returns to Battery Saving Operation; BS II again, where the SC and its own Bat only during the period corresponding to the Frame to which it belongs
tery Saving “OFF”.

Next, FIG. 14 will be described. This is for each Ba
During ttery Saving Operation, under certain conditions, another Mode
Is shown. 14 in Figure 14 is BS I
In SC (Self Address Search Mode), if SC cannot be detected twice consecutively, BS I (Preamble Search Mo
de).

14 in Fig. 14 is BS II (Self Address Search Mode)
And when Self Address is captured and Message Data is received, that is, Message Data Detection Mod
e, but right after Message Data, Address Pat
tern, that is, when a Codeword with a Message Flag of “0” arrives, the BS II Self Add
Enter ress Search Message Mode.

Next, if the system uses the alphanumeric code (Al
When the pha-numeric data coding method is used, when the data bits are completed in the middle of the massage codeword, "EOT" signa is set as Dummy to adjust the number of bits.
l, but Message Data Detection M for BS II
If this "EOT" signal is detected in ode, Messa
ge Data Detection Mode, Self Address Search Mo
Enter de.

3.2 BS III (Message Data Search Mode) The operation of this mode will be described with reference to FIG. 15 and FIG. First, FIG. 15 shows that the receiver is BS II (Self Address Search M
ode), the Self Address is captured, and the Mes
The sage codeword is read, and if it is a specific special control code (hereinafter, referred to as a control codeword), the receiver transmits the sage codeword to BS III (Message Data Search Mo
de). This Mode becomes Battery Saving “ON” immediately after receiving the Control Codeword, and continues until the next SC. Battery Saving “OFF” when SC arrives, SC
Is checked, and it is examined whether the Codeword immediately after, that is, the first Codeword of the first Group is the Message Codeword. If it is not Message Codeword, Battery Savi as shown
ng “ON”. And it continues until the next SC comes. When the SC arrives again, Battery Saving becomes “OFF”, and the operation of checking the SC and examining the type of the first Codeword of the first Group is repeated. If the first Codeword of the first Group is a Message Codeword,
y Sav-ing “OFF” is maintained. This state is shown in FIG.

FIG. 16 shows a state in which Message Data is being read, and when the following two conditions are satisfied, another Battery is read.
The transition to the Saving Operation Mode will be described.

First, FIG. 16 shows that when SC cannot be captured twice consecutively, the Battery Saving Opertaion operates in BS I Mode,
That is, the process returns to the preamble search mode.

Also, FIG. 16 shows that while capturing Message Data,
If Codeword comes, Battery Saving Opertion is BS
Return to II Mode, that is, Self Address Search Mode.

Note that in FIG. 15 above, the Message Data Search
Even in Mode, Battery Saving is set to “OFF” only when the Frame of the Group to which the user belongs belongs.
ess Codeword or Message Codeword or Control
This is the normal BS III (Message Data Search Mode) above if Codeword, Search Mode is specially added
BS III-1 (Message Data and Self
Address Search Mode). Further, in FIG. 15, the receiver is a BS II (Self Address Sear).
ch Mode), only by capturing the Self Address, that is, without capturing a specific special control code (Control Codeword) immediately after the Self Address, the BS III (Mess
age Data Search Mode). To distinguish this from the above-mentioned normal BS III, BS III-2 (Message Data Search Directly Mod
e).

4.Explanation of the operation of the information receiver The character display type individual selective call receiver usually determines which call number among the plurality of call numbers of the receiver together with the received information, and furthermore, Sometimes
The Function bits are stored in the RAM 7 serving as an information storage unit together with additional information such as something, and this is performed in the order of reception. Then, when information exceeding the storage capacity is sent, old information is deleted. This will be described with reference to FIG.

First, FIG. 17 (1) shows that information 4 has been received in a state where information 1, 2, and 3 are already in the RAM of the receiver. The result is the left part of FIG. 17 (2). Next, information 5 is received. The result is the left part of FIG. 17 (3). Here, the storage capacity of RAM is “FUL
L ", ie, indicates that it is full. FIG. 17 (4) shows what happens when information 6 is received. That is, information 6 which is newer than the left side of the RAM.
, The old information is pushed to the right. As a result, information 1 and 2 completely protrude. Also, some part of the information 3 is protruding. Any information that exceeds the storage capacity by a small amount is erased. That is, the information 3 is also to be erased. As a result, the contents of the RAM are as shown in FIG. 17 (5). Here, an empty space may occur at the right end.

Next, a function called an information receiver will be described. Apart from the usual individual call as described above, a part of the information storage unit is allocated in advance for the information receiving function. That is, a specific information storage unit is allocated in advance to a specific call number (or one corresponding to a specific Function Bits) among a plurality of call numbers possessed by the receiver, and other call numbers are assigned. It is made independent of the storage unit for information sent and called by number. When the receiver has a plurality of specific call numbers having the independent information storage unit, a role is determined for each call number. Then, for example, it can be used as a receiver for a system that broadcasts information that changes every moment, such as stock information, gold and other precious metal prices, exchange rates, and commodity trade rates. This may be called an information receiver. The features of this information receiver are:
Since the independent information storage unit is allocated, information called and received by a specific call number is stored in the storage unit, and at the same time, old information that has been stored in the past is automatically deleted. It is in. That is, the information is automatically updated. Further, in this case, one of the features is that the information stored in the other area of the information storage unit is not affected at all.

The operation of the information receiver will be described below with reference to the drawings. First, FIG. 17 (6) shows that ordinary information 1, 2, and 3 are already stored, and information 4 and information 5 are stored in the specific information storage units II, III, IV, and V, respectively. Indicates a state in which Then, the information 6 was received. At this time, since the information is the specific information III, the information 6 is stored therein. The result is the 17th
It is a figure (7). And furthermore, information 7 was received.
Since this information is the specific information IV, the old information 5 in the specific information storage unit IV is expelled and deleted. The new information 7 enters there. This is shown in FIG. 17 (8).

5. The receiver of the present invention has a unique calling number.

A plurality of these are stored in a ROM (call number recording unit) 5. For example, ♯1 ... 0001001 ♯2 ... 0002001 ♯3 ... 0003001 ♯4 ... 0004001 ♯5 ... 0005001.

Next, the information sent from the base station is stored in a RAM (information storage unit) 7 and, at the same time, whether or not this is a special control code is determined. The following can be considered as an example.

Since the receiver of the present invention basically operates by giving priority to the numeric display format, the numeric display format is adopted as the special control code. That is, special characters (*,
,-, (,)). Also, 1Cod
Since five characters can be included in eword, a combination of five characters is considered appropriate.

((11) Special control code 1 (22) Special control code 2 (33) Special control code 3 (44) Special control code 4 (55) Special control code 5 Many combinations can be made, and these special control codes should be used in combinations that are unlikely to be used in normal communication.

When the receiver according to the present invention receives these special control codes, the CPU (central processing unit) 6 stores the received information in the RAM (information storage unit) 7 so that the received information is not information to be displayed. And erase the information.

Here, there are several special control codes. For example, the special control code “1” enters the BS-III mode (Message Data Search Mode) described in the above 3 and stores and displays the received information in a numerical display format. Is performed. Similarly, the special control code "2" is a command to enter the BS-III mode. However, it is assumed that the received information is also stored and displayed in an alphanumeric display format.

The certain regularity of the true transmission information sent from the base station is specifically defined as the second and subsequent batches (Second & Subsequent
Butches) just after SC (Synchronization Codeword)
That is, the first codeword of the first frame (F0) of each batch is Me
Sending information with ssage Codeword.
(Here, the subscriber of the 8th Group is the 2nd Co of the 8th Frame (F7)
Call with deword and change the special control code to the next Batch
It is prohibited to send to the 1st Codeword of the 1st Frame (F0). That is, no call is made under this condition. When the special control code "1" or "2" is received, the receiver of the present invention waits for an information signal in the BS-III mode. If Address Codeword or Idle Codeword (both Message Flag is “0”) comes immediately after SC, Battery
Return to Saving Operation (BS-III mode). This continues until a Message Codeword (Message Flag is “1”) comes immediately after the SC.

This operation has an advantage in that all the individually selected paging receivers that want to send the same information can be prepared to receive the information under the same conditions regardless of the Group (1 to 8) to which each Pager belongs. This is useful in the information receiver system described in 4. above. The information reception is to send the same information to a subscriber who satisfies specific conditions (such as paying a subscription fee) with information such as stocks and exchanges. For example, the following numbers are assigned to subscribers who meet specific conditions. 000 300 1,000 300 2,000 300 3,000 300 4,000 300 5,000 300
Since eight numbers 6,0003007,0003008, are assigned, all subscribers always belong to any one of the groups, and therefore, any one of the above is used.

First, the subscriber number (call number) of Group1 from the base station
At the same time, the special control code “1” or “2” is sent. That is, "0003001" and "((11)" or "((2
2) ". Also, for Group2 subscribers, "000
"3002" and "((11)" or "((22)". Similarly, the calling number and special control code of each Group are transmitted, that is, "0003008" to "0003008" and "((11 ) ”Or“ ((22) ”.
Now all receivers are in BS-III mode and SC
Wait for the Data of Message Flag “1” immediately after “.” The
After receiving the data, it is displayed in the format indicated by the instruction according to the special control code already received. This example is shown in FIG.

All 1st Codewords of each Frame are called numbers (Message F
lag is “0”), and the second codewords are all special control codes (Message Flag is “1”).

Here, since the receiver of the present invention basically receives the numeric display format with priority, even if the special control code is five characters, only one Codeword is required. As a result, if there is only one call number for each Group, just 1B
With atch, all receivers can be in BS-III mode.

(If the alphanumeric display format has priority, if the special control code is 5 characters in the same way as described above, 5
(Character) x 7 (bits / character) / 20 (bits / Codeword) = 1.7
At 5, it takes 2 Codewords. In this case, even if each group is called only once, in order to escape the prohibition condition of the 8th Group, the layout as shown in Fig. 19 must be considered, and eventually 11Codewords of 3rd Batch will be used. There is a disadvantage. Further, as described above, there is a fundamental drawback that the 8th Group can be entered only once in order to avoid the 8th Group prohibition condition. Here, Message Data is in 2nd Batch, and “× ○
× ○ ×× ○○ Δ ○ Δ ○○○ ×× ......... ”. this is,
The special control code “ΔΔΔΔ” is decoded and displayed in either “alphanumeric character display format” or “numeric display format” by “1” or “2”. For example, if the content of the received information is the same as D1 to D4 in FIG. 9, if the special control code is "2", it is in the alphanumeric format because "ABCD".
E fghi ”. If the special control code is "1", it is a numeric display format, so "141" 09854189 (8) 431
0 ".

In this case, the receiver receives the special control code,
This automatically determines whether the display format is numeric or alphanumeric. Therefore, in order to inform the subscriber of which one has been selected, it is preferable to light a letter "A" or "N" on the display unit, which indicates which format is currently displayed. Further, if the special control code is erroneously received and the format is inverted, or an external compulsory changeover switch is provided for forcibly changing the format at the will of the subscriber. However, in this case, the above-mentioned format display “A” or “N” may be blinked to indicate that the format is forcibly inverted.

[Effects of the Invention] As described above, the present invention provides information reception control (BS-
When the receiver enters the III mode), the transmission of the transmission information from the base station only needs to be performed once, so that there is an effect that radio waves can be effectively used.

For example, assuming a case where a Numeric Data Coding Method sends a 20-character number to a subscriber of each group, the occupation time of radio waves is compared.

 First, to send 20 characters, 20 (characters) × 4 (bits / character) ÷ 20 (bit / Codeword) = 4 (Codewords) 4Codeword is required.

(1) In the case of the transmission method of the present invention (using the BS-III mode) Refer to FIG. 20 (1). “Δ” is a call number for each Group, and “D” is an Idle Codeword for Dummy. Since the command to BS-III mode has been completed for all receivers in the first batch, the transmission information `` xx
Send 4 Codewords equivalent to 20 characters of “XX” (numerical information).

 1.Preamle Signal = 18Codewords 2.1st Batch = 17Codewords 3.2nd Batch = 5Codewords, for a total of 40 Codewords.

Since 1 Codeword is 32 bits, 32 × 40 = 1280 bits. If the signal transmission rate (Band Rate) is 512 (bits / sec)
Then, the radio wave occupation time is 1280/512 = 2.5, that is, 2.5 seconds.

(2) In the case of a conventional ordinary transmission method: FIG. 20 (2) is shown. Immediately after each Pager ID (indicated by “Δ”), the transmission information, 4Codewords of “xxxx”, is transmitted each time, so it takes some time in the third batch.

1.Preamle Signal = 18Codewords 2.1st, 2nd Batch = 17 × 2 = 34Codewords The first half of 3.3rd Batch = 14Codewords, for a total of 66 Codewords. 32 × 66 = 2112bits, Band Ra
If te is 512 (bits / sec), 2112/512 = 4.125,
It takes 4.125 seconds.

From the above, 66 Codewords / 40 Codewords = 1.65 times, 4
0/66 = 0.060 ... about 60%, 100-60 = 40%, By using the information reception control (BS-III mode), in the case of this example,
The radio occupation time was reduced by nearly 40%. The effect will be more pronounced if this is longer information.

For example, if the Alpha-Numric Data Coding Method normally sends 32 characters as the number of characters, 32 (characters) x 7
(Bits / character) ÷ 20 (bits / Codeword) = 11.2, 12Codewo
rds is required. Proceed in the same way.

 In the case of the transmission method of the present invention, 1.Preamle Signal = 18 Codewords 2.1st Batch = 17 Codewords 3.2nd Batch = 13 Codewords A total of 48 Codewords.

On the other hand, in the conventional method, Message Data
(12 Codewords), and until the Frame is synchronized
5th of 8th Batch to include Idle Codewords for Dummy
Required up to deword. That is, 1.Preamle Signal = 18Codewords 2.1st ~ 4th Batch = 17 × 4 = 68Codewords 3.5th Batch = 6Codewords A total of 92 Codewords.

From the above, 48/92 = 52.17 about 52% 100−52 = 48 In this case, almost 48% of the radio wave occupation time could be deleted.

[Brief description of the drawings]

FIG. 1 is a block diagram of an individual selective call receiver with a character display function of the present invention. FIG. 2 shows a signal configuration (Signal Format) of the POCSAG system. FIG. 3 shows the structure of Codeword. FIG. 3A shows a Synchronization Codeword. FIG. 3 (2) shows the Codeword Structure. FIG. 3 (3) shows the idle codeword. FIG. 4 shows the structure of the pager identity, that is, the called number. FIG. 5 shows the relationship between Function Bits and Multi Function. FIG. 6 is a table of a numerical display code system. (Numeric Data Coding Method) FIG. 7 is an example of signal transmission in the case of a numeric display code system. (Numeric Message Format) FIG. 8 is a table of the alphanumeric character display code system. (Alph
a-Numeric Data Coding Method) FIG. 9 is an example of signal transmission in the case of the alphanumeric character display code system. (Alpha-Numeric Message Format) FIG. 10 is an example of signal transmission in the case of the alphanumeric character display code system. (Example of Alpha-Numeric Message Format) Fig. 11 shows Preamble Search of Battery Seving Operation
Mode (BS-I mode). FIG. 11 shows a transmission signal from the base station. FIG. 11 shows the power control status of the “AF” Stage of the receiver. FIG. 11 shows the power control status of the "RF" Stage of the receiver. FIG. 12 shows that the receiver belonging to Group “6” is a pre-amble signal.
And Self Address Search Mode (BS-II mode)
Enter, and at the time of Frame5 (F5) which is SC and Group “6”, Bat
Indicates that tery Saving is “OFF”. FIG. 13 shows that the receivers belonging to Group “6” have detected the Message Data and then returned to the BS-II mode. FIG. 14 shows the operation of the receiver during the BS-II mode. Fig. 1 shows the case where SC detection cannot be performed twice consecutively.
Indicates return to BS-I mode. FIG. 14 shows the next Address Pattern, that is, the message while receiving the transmission information.
When receiving the flag whose flag is "0", it indicates that the mode returns to the BS-II mode again. FIG. 14 also shows that when the special code “EOT” code is received during the Message Data Detection Mode, the mode returns to the BS-II mode. Figure 15 shows the Battery Saving Operation, where the Message Data S
Shows the BS-III mode called earch Mode. That is, when a certain condition is satisfied, the information (Messag
e Flag looks for "1"). Preamble Search Mode (BS-I mode) until preamble signal is captured
Then, when the preamble signal is captured, Self Address Search
Mode (BS-II mode). Next, Self Address,
When the special control code is captured, the Message Data Search Mo
de (BS-III mode). Fig. 16 shows the case where SC is not received twice in BS-III
The operation when the next Address Patern in the Data Detection Mode is received or when the special code “EOT” code is received is shown. FIG. 17 is an explanatory diagram of the operation of the information receiver, and FIG. 17 (1)
17 to 17 (5) show an example of a case of a normal individual selective calling receiver, and FIGS. 17 (6) to 17 (8) show unique movements of the information receiver. FIG. 18 shows an example of information transmission. FIG. 19 shows the assumed conditions of information transmission (when Alpha-Numeric has priority). FIG. 20 shows a comparison between the transmission method of the present invention and a normal transmission method. 1 ANT (antenna (antenna)), 2 RX (FM receiver), 3 DISC (discrete circuit), 4 DEC (decoder), 5 ROM (read-only memory (calling) Number recording section)), 6 CPU (central processing section), 7 RAM (random write / read memory (information storage section)), 8 MSW (external manual switching unit), 9 A / N ( Type switching circuit), 10: DISP (display unit), 11: SW (power supply control unit (Battery Saving Circui)
t)), 12 ... PS (power supply), 13 ... SP (speaker).

Claims (2)

(57) [Claims] 1. A function of having a unique call number and temporarily storing information transmitted from the base station following the call number as a temporary numeric display format in the landed information storage unit. It is determined whether this information is a predetermined special control code, and if it is a special control code, the above information is information to be displayed as characters,
That is, it is determined that the information is not the character display information, the information of the address is deleted, and the character display information sent from the base station with a certain regularity is automatically controlled according to the regularity. Whether the function and the character display information captured by the type of the received special control code is a numeric display format or an alphanumeric format is automatically determined and stored in the landed information storage unit. A personalized call receiver with a display function, which has a function of performing a call operation at the same time as displaying a call on a display unit. 2. In the above receiver, when the information transmitted from the base following the calling number is not a special control code but character display information, the numbered information storage section is temporarily provided as a numeric display format. The external selection switch is provided so that the user can arbitrarily select either the numeric display format or the alphanumeric display format when reading. Receiving machine.