KR0178838B1 - Power saving method of paging receiver - Google Patents

Abstract

The present invention relates to a method for saving power of a wireless paging receiver having a wide area network service function. The present invention relates to a method for saving power to a user and an interface, and to amplify RF signals of standard and service frequencies received through an antenna for receiving RF signals. The RF stage converts a binary digital signal in the form of POCSAG data, a memory storing personal ID and ID and data necessary for a wide area service, and detects a synchronization signal from the POCSAG data received connected to the RF stage. A decoder having a function of applying a synchronization detection signal to the control means, reading the message code word received by the control means and reading the personal ID and applying it to the control device, and the address code word of the POCSAG data input via the RF terminal. A personal ID read out from the local area service for the medium-area service and also stored in a memory and an individual authorized from the decoder 2 The present invention relates to a power saving method of a wide area wireless calling receiver comprising control means for driving an interface means to display an alarm signal and a message when the IDs match.

In addition, the control means has a wide-area service function by distinguishing the area ID received at the standard frequency, and the other data processing received at the service frequency uses a decoder so that the control means consumes a relatively large amount of power in comparison with the decoder. The present invention relates to a method for saving power of a radio call receiver of a wide area service function, which can reduce power consumption and reduce an excessive burden on a control means.

Description

How to save power in wide area wireless page receivers

The present invention relates to a radio call receiver having a wide area service function, and more particularly, to a power saving method of a wide area service radio call receiver with low power consumption and improved reliability.

First, the signal type used for the radio call receiver will be described with reference to FIG.

In general, the type of signal used in a radio call receiver uses the POCSAG data type specified by the Post Office Standardization Advisory Group (POCSAG), which is a standard code for receiving international radio calls.

The form of the POCSAG data is composed of a preamble and a group structure, as shown in FIG.

end. Pre-signal (see Figure 4 (a))

Each transmission starts with a pre-signal to prepare the receiver to first take a bit sync and get frame sync. The pre-signal is an inverted form of '101010 ...', the period of which is at least 1 group (Batch) + 1 code word, which is 576 bits or more.

I. Group structure (see Figure 4 (a))

Each batch consists of a sync codeword followed by eight frames, and each frame consists of two codewords. Since each frame is identified by a number from 0 to 7, it belongs to one of eight frames according to three LSBs of the 21 identification bits. Thus, since each receiver only checks an address codeword within the corresponding frame, the corresponding address codeword of each receiver must be transmitted in their assigned frame.

① Codeword (See Fig. 4 (d))

The codeword has 32 bits and transmits MSB first. There are four types of codewords: sync codewords, address codewords, message codewords, and idle codewords.

② Sync codeword

The sync codewords are the same as those in FIG.

③ address codeword

The structure of the address codeword is shown in FIG. 4 (d), the first bit is a message flag (Flag), and the flag of the address codeword is always '0'. This is distinguished from the message codeword. The second to the 19th bits are 18 MSBs among 21 identification bits allocated to the receiver, which are address bits. The three LSBs are not transmitted but are used to define the frame to which the address codeword should be transmitted. The total number of code identifications is therefore 2 ²¹ (more than 2 million). The twentieth and twenty-first bits are used to select the required address among the four ring tone functions assigned to the receiver. The total number of addresses is therefore 2 ²³ (more than 8 million). The 22nd to 31st bits are check bits for automatic error correction and detection, and the last 32 bits are even parity which is always made even for the error code detection of the sum of all bits. Use for

④ message codeword

The structure of the message codeword is shown in FIG. The message codeword always starts with '1' (message flag = 1) and the entire message always follows immediately after the address codeword. Messages do not apply codeword-type frame rules because they may contain a large amount of data. If extra codewords remain in the frame ending the message, they are filled with idle codewords. In the next frame, the address codeword is sent and the message transfer ends. This particularity of the message codeword causes the address codeword to be delayed and transmitted in the next valid appropriate frame. This message codeword can continue to the next group. That is, the idle codeword is transmitted and the address codeword is transmitted only when there is a codeword redundancy at the end of the message. The address codeword starts from the first codeword of the next frame. The message codeword has 20 message bits from the second to the 21st bits, followed by 10 check bits and even parity check bits.

⑤ Idle codeword

The message codeword is sent and the extra codeword of the frame is transmitted as the idle codeword. The idle codeword is also a useful address codeword, but it is not needed by the receiver, and the bit structure is shown in FIG.

The form of POCSAG data has been described above.

A prior art wireless call receiver using POCSAG data as described above is a 4-bit microprocessor as shown in FIG. 1, which controls message display control, alarm control, decoder control and message control in memory. By comparing the control means 14 and the data stored in the memory (EEPROM) 13 and the received data connected to the control means 14 to perform the detection of the synchronization signal of the codeword and data bits, A decoder 12 having a function of decoding data and comparing and judging personal IDs, an EEPROM 13 storing information on personal IDs and other necessary optional specifications, and 12 digits controlled by the control means 14 described above. LCD 18 for displaying data, an antenna 19 for two loop antennas, and an RF amplifier 11 for receiving and amplifying a service frequency. RF stage 11 comprising an IF circuit for generating and amplifying and a filter circuit for removing unwanted waves, a motor 16 for generating alarm vibration, a buzzer 15 for generating an alarm sound or a melody, and a radio call receiver It consists of a key 17 for selecting the function of.

The operation of the conventional radio call receiver configured as described above will be described below with reference to FIG.

First, the RF signal received through the antenna 19 is converted into binary digital data in the form of POCSAG data through the RF stage 11 and input to the decoder 12.

The decoder 12 compares the personal ID, which is the 7-digit subscriber unique number read from the EEPROM 13, with the received ID, and then sends the received message data to the CPU 14 when the IDs match.

When the CPU 14 receives the ID matching signal from the decoder 12, the CPU 14 outputs any one of a preset alarm sound mode or vibration mode by using the key 17, and displays the received message data on the LCD 18. To indicate to the user.

The radio call receiver according to the related art, which is constructed and operated as described above, has a hardware fixed function such that the RF stage 11 and the decoder 12 receive and process only a service frequency including a personal ID and message data. Only local service could be received and wide area service could not be received.

Therefore, the conventional wide area wireless paging receiver has a function to receive various frequencies as the control of the control means for receiving the wide frequency frequency, and instead of using the decoder, the decoder as a built-in program function of the control means. The role was to perform. However, such a conventional technique has a problem in that the control means consumes a lot of power, and there is also a problem in that the control means takes a lot of load and deteriorates the reliability of the wide area radio call receiver.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the conventional wireless call receiver according to the related art, and an RF stage capable of receiving both a standard frequency for confirming a region ID provided by a wireless call service provider and each local service frequency. (1) and the control means (4) by adding a program of a function capable of discriminating only an arbitrary ID to determine the area ID required for the wide area service can be applied directly to the wide area network wireless paging system, also to the wireless paging service provider The processing of the other data received through the local service frequency provided by the decoder is to provide a method for saving the radio call receiver power of the wide area service function to reduce the power consumption and improve the processing speed and reliability by allowing the decoder to perform.

1 is a functional block diagram of a conventional radio call receiver,

2 is a functional block diagram of a wide area radio page receiver according to the present invention,

3 is an operational flowchart of a wide area radio call receiver according to the present invention,

4 is a table showing the form of the POCSAG code.

* Explanation of symbols for main parts of the drawings

1,11: RF stage 2,12: decoder

3,13: memory (EEPROM) 4,14: control means (CPU)

5,15 buzzer 6,16 motor

7,17: key 8,18: LCD

9,19: antenna

In order to achieve the above object, the present invention amplifies an RF means of an interface means between a user and a radio call receiver, an antenna for receiving an RF signal, a standard frequency and a plurality of local service frequencies received through the antenna, RF stage that converts it into binary digital signal in POCSAG data format, memory storing personal ID and all information necessary to receive wide area service, personal ID, synchronization and message data among the data connected to RF stage Determining a region ID for a wide area service by a built-in program connected to the RF stage, and a control means for controlling the operation of each of the components to save power consumption It consists of a radio call receiver having a wide area service function.

According to a feature of the present invention, the present invention is a POCSAG data outputted via the RF stage as a standard frequency received via the antenna after the control means starts operation in the power saving mode, the standard frequency provided by the wireless paging service provider Determining the presence or absence of the synchronization signal (Sync.-data) by the decoder when the decoder detects a synchronization signal, the decoder sends a synchronization detection signal (Sync.-det) to the control means, and the control means in the Active state Operating a timer service routine that is switched to decrypt the region ID, reading 32 bits of received data supplied from the RF stage, and determining whether the received data is an idle codeword or an address codeword; When the data received in the determining step is an address codeword, the area ID of the received address data is the number of wireless calls of the user. If the area ID is compared with the previously entered area ID, and the area ID does not match, the process returns to the data receiving step, receives new data again, and repeats the above steps. Stopping a timer service routine that decodes a region ID after storing and processing received data; and performing a personal ID, synchronization, and message data signal processing process using a decoder. It provides a power saving method of a radio call receiver having.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings.

First, FIG. 2 is a schematic block diagram of a radio call receiver according to the present invention, and FIG. 3 is an operational flowchart of the radio call receiver according to the present invention. 4 is a table showing the configuration of POCSAG data.

As shown in FIG. 2, the radio page receiver of the present invention includes an LCD 8 for displaying data, and a memory (EEPROM) 3 for storing all information on the ID and optional specifications required for receiving other wide area services. And control means (4) for LCD control and alarm control and for discriminating the area ID by a built-in program, and connected with the control means (4) and the EEPROM (3) and receiving the personal ID stored in the EEPROM (3). And a decoder 2 for comparing the personal IDs, reading the synchronization and message data, and sending the ID matching signal and the message data to the control means 4 when the personal IDs match. An RF stage 11 which first processes the antenna 9 and the standard frequency RF signal received through the antenna 9, and later processes the local service frequency RF signal to output binary digital data in the form of POCSAG codes. And motors for generating alarm vibrations (6) And a buzzer 5 for generating an alarm sound, and a key 7 for selecting a function of a radio call receiver, and the POCSAG data outputted from the RF stage 11 includes the decoder 2 and the control means ( 4) are connected at the same time.

As a result, the decoder 2 and the control means 4 can simultaneously recognize the POCSAG data signal processed first in the RF stage 1, but the decoder 2 provides a synchronization signal. The control means 4 is active only when it recognizes and applies the synchronization detection signal to the control means 4, and the control means 4 processes POCSAG data directly to determine only the region ID, and then the RF stage ( 11), a control signal is applied to receive a local service frequency corresponding to the area ID, and a control signal is applied to the decoder 2 to decode the personal ID, the synchronization signal, and the message data. Therefore, the control means 4 decodes only the area ID, which is a standard frequency signal, and the decoder 2 decodes the personal ID, synchronization signal and message data according to the local service frequency.

The operation description of the radio call receiver having the ID discrimination and POCSAG data processing functions according to the present invention will be described in more detail with reference to the flowchart shown in FIG.

First, after the control means 4 starts the operation in the power saving mode, the decoder 9 receives the standard frequency transmitted by the radio call service provider from the RF stage 11 through the antenna 9 and outputs the POCSAG data. Determining whether a synchronization signal (Sync.-data) is present in step 2) and performing step 31; When the synchronization signal is detected, the decoder 2 sends the synchronization detection signal Sync.-det to the control means 4. Accordingly, the control means 4 operates a timer service routine that checks the Sync.-det signal and decodes the address for the wide area service (step 32. From this time, the control means 4 operates in an active mode consuming normal power). As shown in FIG. 4, POCSAG data in which one (1) codeword is composed of 32 bits is read and decoded by 32 bits in an address codeword applied from the RF stage 1 (step 33). Determines whether is an idle codeword or an address codeword (step 34), and if the data received in the determining step 34 is an address codeword, the received address codeword is analyzed to control the RF terminal. The RF stage 1 is able to receive the service frequency of the region (step 35), and at the same time the control means 4 compares in the above process (step 35), the region stored in the memory (3) ID and If not, it returns to step 33, receives new received data again, repeats the above steps, and the decoder 2 decodes the personal ID, synchronization signal, and message data by the local service frequency received from the RF stage 1. And applying the control signal to the storage process and stopping the timer service routine to return to the power saving mode (step 36).

On the other hand, since the timer service routine operation described above generally has a time of 833 ms per one (1) bit at a data rate of 1200 bits per second (bps), the timer service routine shown in FIG. The stage 1 reads POCSAG data applied to the Sig.-in port of the control means 4 at a time of 833 ms or less per bit (step 39), and reads the read data into the control means 4. In the RX-data storage register, which is a storage means (step 40), counting up to 32 bits, which is one (1) codeword (step 41), and FIG. 36 (a) 36 steps of the main program. Terminated by

Subsequent to the above step 36, the control means 4 switches the power saving and reads whether the personal ID decoded by the decoder 2 is the same as the personal ID stored in the memory 3, and if not the same, goes to step 33. Feedback (step 37), and in the same case, read the synchronization signal and message data and apply it to the control means 4 (step 38), and the control means 4 continues the buzzer 5 in the power saving mode. Alternatively, the motor 6 is controlled to send a warning signal, and the message data is displayed on the LCD 8. Therefore, the control means 4 is operated in a power saving mode in which the timer service routine is not continuously operated, thereby saving power, reducing the load, and performing other additional functions as necessary.

The present invention, constructed and operative as described above, can be applied directly to wide area network services of radio page receivers.

For example, the wide area service format of the radio call receiver proposed by the radio call service provider is configured by dividing the standard channel frequency and the local service channel frequency. The radio call receiver firstly transmits the pre-signal of POCSAG data transmitted at the standard channel frequency. After determining whether there is a synchronization signal, and then determine the address codeword, each service area is determined using the 7-digit address codeword (for example, 01-Seoul, 02-Busan, 03-Daegu, ...), retransmits the address codeword at the local service channel frequency, transmits the prefix signal, the synchronization signal, and the personal ID of the POCSAG data, and transmits the message data via the message codeword.

Therefore, by using the method of determining the area ID of the address codeword according to the present invention by the control means 4, the function of the radio call receiver for the wide area service can be improved and the power consumption of the radio call receiver can be reduced.

In the present invention, only when the decoder 2 connected to the RF 1 stage detects the synchronization signal of the standard frequency, the detection means is applied to the control means 4 so that the control means 4 becomes active and the area ID is determined. The control means 4 then switches to the power saving mode and allows the decoder 2 with low power consumption to process the personal ID, synchronization signal and message data that has passed the local service frequency.

As a result, in case of the wide area network service of the radio call receiver, it is possible to determine the area codes which are divided by each area. Moreover, since the control means grants only the ID discrimination function and other data processing uses the decoder, the power is relatively higher than that of the decoder. It is possible to reduce the power consumption by the control means that consumes and to reduce the excessive burden of the control means, thereby improving the reliability of the wide area radio call receiver.

Claims (3)

In the wide area service radio call receiver, the decoder detects the synchronization signal applied from the RF terminal and applies it to the control means, and the control means detects the synchronization signal applied from the decoder to terminate the power saving mode and the timer sub The timer subroutine operation step of operating the routine, and processing the address codeword applied from the RF terminal to confirm the region ID, controlling the RF terminal to receive the local frequency, and then stopping the timer subroutine switching to the power saving mode again. And the decoder is configured to perform personal ID, synchronization signal and message processing as control of the control means. 2. The method of claim 1, wherein the operation of the timer subroutine is terminated when the data stored in the storage means becomes 32 bits of one (1) codeword. 2. The method of claim 1, wherein the stopping of the timer subroutine continues to operate the timer if the address codeword read in 32 bits does not match the region ID stored in the memory.