KR0173899B1 - Wireless call character information transmission / reception using fixed frame - Google Patents

Abstract

The present invention relates to a method of transmitting / receiving a call-to-call character information for transmitting various types of information using a fixed frame allocation number on a POCSAG code through a wireless call network, so that each subscriber has a same frame number. In order to provide a method of transmitting / receiving a radio call text information which improves transmission efficiency by assigning a number and sending various information only once through a fixed frame number, each subscriber has a different frame number after assigning the same frame number. A first step (41 to 43) of allocating a personal cap (CAP) code and assigning each subscriber the same common cap information (CAP) code; A second step (61 to 63) carrying various kinds of information on a codeword frame allocated to the same frame number on the POCSAG code; And a third step (71 through 76) of receiving and decoding the cap code and the various information transmitted by the wireless calling terminal 15 through the wireless calling network and outputting the various information to the user. By transmitting information to all subscribers at the same time, it is possible to drastically reduce unnecessary radio channel occupancy time due to repeated transmission of the same contents.

Description

Wireless call character information transmission / reception using fixed frame

1 is an overall configuration diagram of a wireless call text service system to which the present invention is applied,

2 is a detailed configuration diagram of a radio call character terminal to which the present invention is applied;

3 is a block diagram of a POCSAG, which is a format for transmitting a radio call information according to the present invention;

4 is a flowchart illustrating a method for applying a CAP code according to the present invention.

5 is a configuration diagram of an information transmission and reception format according to the present invention;

6 is a flowchart illustrating a process of transmitting various types of information according to the present invention.

7 is a flowchart illustrating a process of receiving various types of information according to the present invention.

* Explanation of symbols for main parts of the drawings

11: public telephone network and dedicated line 12: information processing server

13: Computer Management Center host computer 14: Wireless call network

15: wireless call character terminal 21: wireless network connection

22: information processing unit 23: user input unit

24: LCD window

The present invention relates to a method of transmitting / receiving wireless calling text information by transmitting various information such as personal information, stock information, traffic information, weather information, etc. using a fixed frame allocation number on a POCSAG code through a wireless calling network. .

In the conventional wireless call character service scheme, a cap code is assigned in a manner having a different codeword frame number to transmit character information using different codeword frames in a POCSAG code. In the wireless paging text service system, in transmitting common information such as stock information, traffic information, and weather forecast to each subscriber, a transmission time slot (time slot) is performed according to a different frame number assigned to each subscriber on a POCSAG code format. Because the slots are different, the same information has to be transmitted eight times.

Therefore, the conventional wireless call text service method as described above has a problem that the wireless channel occupancy time is unnecessarily increased, resulting in a very low transmission efficiency. In addition, this problem has become more serious as the amount of information provided increases.

In order to solve the above problems, the present invention provides a cap code number so as to have the same frame number for each subscriber, so that various information such as stock information, traffic information, weather forecast, and the like are fixed through a fixed frame number (same time slot). It is an object of the present invention to provide a method of transmitting / receiving a radio call character information which improves transmission efficiency by sending information only once.

In order to achieve the above object, the present invention provides a method for transmitting / receiving a radio call text information that is applied to a radio call text service system, and assigns a different personal cap code to each subscriber after assigning the same frame number to each subscriber. A first step of allocating the same common information cap code to each subscriber; A second step of carrying various kinds of information on a codeword frame allocated to the same frame number on the POCSAG code; And a third step of the wireless calling terminal receiving and decoding the cap code and the various information transmitted through the wireless calling network and outputting the various information to the user.

Hereinafter, with reference to the accompanying drawings will be described an embodiment according to the present invention;

1 is an overall configuration diagram of a wireless call character service system to which the present invention is applied, wherein reference numeral 11 is a public telephone network (PSTN) and a dedicated line, 12 is an information processing server, 13 is a computer operation center host computer, and 14 is a wireless call. 15 denotes a radio calling character terminal.

Various information from the called party or information provider host computer is input to the information processing server 12 through the public telephone network (PSTN) and the dedicated line 11, and the information processing server 12 processes the various information inputted. It delivers to the radio calling network 14 using the Telocator Alphanumeric Paging Input Protocol (TAP) or the Telocator Network Paging Protocol (TNPP). In addition, the information processing server 12 receives service subscriber information from the computerized operation center host computer 13 and performs subscriber control according to the subscriber control strategy. The radio call network 14 receives the formatted information from the information processing server 12, processes it into a POCSAG code format, converts it into a radio call signal, propagates to the air through a transmitter, and the radio call character terminal. 15 receives and processes the propagated information in the form of a radio call signal and outputs various information in the form of a text message to the user.

2 is a detailed configuration diagram of a wireless call character terminal to which the present invention is applied, and reference numeral 21 denotes a wireless network connection unit, 22 an information processing unit, 23 a user input unit, and 24 a liquid crystal window.

The information in the form of a radio call signal propagated through the radio call network 14 is received and decrypted by the radio network connection unit 21 and then transmitted to the information processing unit 22. The information processor 22 processes the decoded information and stores the decrypted information in a memory area, and processes a command input through a user input unit 23 such as a function key or a numeric key of a wireless calling character terminal, and when there is an information display request, The information is retrieved from the memory and displayed in text form on the liquid crystal window 24 of the wireless calling character terminal.

3 is a configuration diagram of a POCSAG, which is a format for transmitting a radio call information according to the present invention.

Currently, a radio call system transmits and receives information using a POCSAG code designated as a radio call information transmission format. The POCSAG code consists of a preamble 31 of 576 bits and a number of batches 32 of 544 bits.

Each batch 32 includes a 32-bit sync codeword 33 and eight 64-bit codeword frames 34, each codeword frame 34 having an 32-bit address codeword 35. ) And a data codeword 36.

The address codeword 35 carries cap code information corresponding to the terminal identification number, and the first bit is always designated as 0 to distinguish it from the data codeword 36. The data codeword 36 is a portion carrying various kinds of information to be sent, and the first bit is always designated as 1 to distinguish it from the address codeword 35.

In the radio calling system, eight codeword frames 34 included in each arrangement 32 are sequentially allocated to different time slots according to the frame number and transmitted and received.

4 is a flowchart illustrating a method for applying a CAP code according to the present invention.

The CAP code is originally an identification number for identifying a terminal, and is composed of a 21-bit binary bit string, and is represented by seven digits from 0,000,000 to 2,097,152 in decimal. The codeword frame number 34 from F0 to F7 is designated by the last 3 bits of the 21 bits of the CAP code, and then the address information and the message information through the corresponding codeword frame 34 of the POCSAG code. Is sent.

Table 1 below is a table showing how to distinguish between personal information and common information. In the wireless calling text service system, two types of personal cap codes and common information cap codes are provided to service personal information such as personal information, securities information, news and traffic information through the same channel. Use a CAP code.

As suggested by the present invention, in order to increase transmission efficiency through frame fixing, frame numbers of all subscribers must be matched. For this purpose, the frame number to be used is first determined 41. Next, all CAP code numbers corresponding to the selected frame number are derived within the designated range shown in Table 1 (42). Thereafter, one of the CAP code numbers derived according to the subscriber's service subscription is assigned to the subscriber, and the subscriber is registered with the system and the terminal of the radio call character service system. At this time, the individual cap code is differently assigned to each subscriber, and the common information cap code is selected from one of the derived ones, and is equally assigned to each subscriber (43). For example, if it is decided to send various information through the frame 0, the corresponding cap code numbers are 0,000,000, 0,000,008, 0,000,016... Etc., and select one of them according to subscriber's service subscription.

5 is a block diagram of an information transmission and reception format according to the present invention, and transmits various types of information including personal messages by fixing a code word frame number under a POCSAG format based on the matters described in FIG. 3 and FIG. Indicates the information transmission format.

Here, as an example, a case where information is transmitted by being fixed to frame 0 is shown. Starting from frame 0 (51) following the preamble and the synchronous codeword (SC), the CAP code information and the corresponding information are a bit string in the form of a data codeword (D) that is connected with the address codeword (A). Continue to allocate until all of them are exhausted. Subsequent new information consecutively allocates the CAP code information and the corresponding information from the next existing frame 0 (53), and the empty space from the previous information is an idle codeword, a meaningless bit string. Filled with 52.

6 is a flowchart illustrating a process of transmitting information according to the present invention.

In transmitting the various information including the personal message in the wireless call network, it transmits in the order shown in FIG. First, the preamble is transmitted (61), and after the synchronization code is transmitted (62), starting with the designated codeword frame (e.g., frame 0) in the batch, the CAP code information and various data are contiguous. Transmit (63).

7 is a flowchart illustrating a process of receiving information according to the present invention.

The radio call character terminal 15 first receives and decrypts a preamble (71), and receives and decrypts a sync code (72). Next, the radio call character terminal 15 operates the radio unit in a time slot associated with a predetermined codeword frame number (73) to receive and decode the CAP code, and then the CAP code information matches its own. In operation 74, the data codewords D successively received are decoded and analyzed and then stored in the internal memory area (75). Thereafter, the stored information is displayed immediately together with the alarm sound or by a user command by the user input unit 23 (76).

The present invention configured and operated as described above enables information to be simultaneously transmitted to all subscribers using the same codeword frame number in the transmission of information common to all subscribers such as stock information, traffic information, weather forecast, and major news. By doing so, it is possible to drastically reduce unnecessary wireless channel occupancy time due to repetitive transmission of the same contents, thereby economically and efficiently providing information service using wireless calling without substantially changing the existing wireless calling text providing system. .

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those of ordinary skill in the art to which the present invention pertains. It is not limited to the drawings shown.

Claims (4)

In the method of transmitting / receiving radio call character information applied to a radio call character service system, after allocating a same frame number to each subscriber, a different cap code is assigned to each subscriber, and the same common information cap is assigned to each subscriber. A first step (41 to 43) of allocating a (CAP) code; A second step (61 to 63) carrying various kinds of information on a codeword frame allocated to the same frame number on the POCSAG code; And a third step (71 to 76) of the wireless calling terminal 15 outputting various kinds of information to the user after receiving and decoding the cap code and various kinds of information transmitted through the wireless calling network. How to send and receive text information. 4. The method of claim 1, wherein the first steps (41 to 43) comprise: determining (41) a frame number to be assigned identically to each subscriber; Deriving all the corresponding CAP code numbers according to the selected frame number within a designated range (42); And assigning a different personal cap code to each subscriber, and assigning the same cap information code to each subscriber, and then registering the contents of the assignment in the paging text service system (43). Wireless call character information transmission and reception method, characterized in that. 3. The method according to claim 1 or 2, wherein the second steps (61 to 63) comprise: transmitting a preamble and transmitting a sync code (61, 62); And transmitting (63) the CAP code information and various data as a sequence of consecutive bits starting from the designated codeword frame in the arrangement of the POCSAG. The method as claimed in claim 1 or 2, wherein the third steps (71 to 76) are performed by the wireless calling terminal (15) receiving and decrypting a preamble and receiving and decoding a sync code (71, 72). ; The wireless call terminal 15 receives and decodes a CAP code through a time slot associated with a predetermined codeword frame number, and subsequently receives data codewords if the CAP code information matches that of the CAP code. Decrypting and analyzing D) and storing it in an internal memory area (73 to 75); And displaying (76) the stored information immediately with the alarm sound or by a user command by the user input unit (23).