KR100310776B1 - Method for transmitting data in cradle state of spread spectrum telephone - Google Patents

Abstract

The present invention relates to a method in which the main body 20 transmits a PN code, a UW code and channel information to the handset 10 in a spread spectrum wireless telephone. The main body 20 and the handset of the wireless telephone according to the present invention 10, the memory 16, 26, which stores the same PN code, UW code, and channel information at the same address, comprises a virtual memory 17 for storing the addresses of the memory 16, 26; 27 is configured. Therefore, since the main body 20 transmits an address in the virtual memory 27 without transmitting the PN code, UW code and channel information to the handset 10, the transmission time of the PN code, UW code and channel information can be shortened. It works.

Description

Method of transmitting data in cradle state of spread-spectrum cordless phone {METHOD FOR TRANSMITTING DATA IN CRADLE STATE OF SPREAD SPECTRUM TELEPHONE}

The present invention relates to a spread spectrum wireless telephone, and more particularly, to a method for transmitting data necessary for wireless communication in a cradle state of a wireless telephone.

Wireless telephones are being converted to spread spectrum through early analog communication. Initially, analog cordless telephones had about 10 channels between the main body and the hand set, and communicated with analog signals.However, poor analog quality and the possibility of eavesdropping and crosstalk between external devices or cordless telephones. There was a problem that this occurred. In order to solve this problem, digital wireless telephones have been developed. However, in general digital wireless telephones, there is a problem in that the communication distance is limited due to the use of a relatively high frequency band and limited communication power. This problem is solved by a spread spectrum wireless telephone, and the spread spectrum wireless telephone employs a spread spectrum scheme, as its name suggests, which can extend communication power, thereby extending its communication distance.

Spread-spectrum cordless telephones use PN codes and UW codes. The PN code and the UW code serve as security code and identification code to prevent eavesdropping in addition to spreading the communication data of the wireless telephone. In order for the PN code and the UW code to function as the safety code and the identification code, the PN code and the UW code need to be changed irregularly. To this end, in the conventional spread spectrum wireless telephone, as shown in FIG. 1, 10 types of PN codes (PN1-PN10), 10 types of UW codes (UW1-UW10), and channel information (CH1-CH12) are normally present in the main body. ) Is stored and forwarded to the PN code and UW codes handset for use in the call with the handset. In other words, the handset of the cordless phone is combined with the main body for charging or storing in a call waiting state (this is called a cradle state). In the cradle state, the handset and the microcomputer of the main body communicate with each other by wire. The microcomputer of PMI applies a PN code (PN1-PN10), a UW code (UW1-UW10) and channel usage information (CH1-CH12) to be used for the next call to the microcomputer of the handset. Therefore, the radio call, which is conducted with the handset and the main body separated, is made with the designated PN code, UW code and channel in the cradle state.

However, in the cradle state of a conventional cordless telephone, the main unit has a total of 256 bits for the PN code (PN1-PN10), UW code (UW1-UW10) and channel information (CH1-CH12) selected for the handset, that is, a total of 256 bits. Since 16 bits and 16 bits must be transmitted for channel information, the transmission time is long.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a spread spectrum wireless telephone that can stably transmit PN code, UW code and channel information from a main body to a handset in a cradle state of a wireless telephone. It is to provide a data transmission method in a cradle state.

In order to achieve the above object, the present invention provides a spread spectrum in which preset PN codes, UW codes, and channel information are stored at the same address of a memory in a handset and a main body, and a virtual memory in which a predetermined address of the memory is stored is configured. CLAIMS 1. A method for transmitting a PN code, a UW code, and channel information to a handset in a cradle state in a main body wireless telephone, comprising: determining whether a body is in a cradle state; If in the cradle state, transmitting address information in the virtual memory to the handset by wire; Reading PN code, UW code and channel information stored in an address of a memory corresponding to the address transmitted to the handset; Decoding a signal received from a channel corresponding to the read channel information into a read PN code and a UW code to determine whether the decoded signal is an address acknowledgment signal from the handset; If the decoded signal is an address acknowledgment signal from the handset, spreading the ACK signal with the read PN code and the UW code, and transmitting the spread ACK signal to the handset through a channel corresponding to the read channel information. do.

The present invention also relates to a spread spectrum wireless telephone in which a predetermined PN code, a UW code, and channel information are stored at the same address of a memory in a handset and a main body, and a virtual memory in which a predetermined address of the memory is stored is configured. CLAIMS 1. A method in which a handset receives a PN code, a UW code, and channel information transmitted from a main body in a cradle state, comprising: determining whether a cradle is in a cradle state; Receiving address information in a virtual memory from the main body by wire in a cradle state; Reading PN code, UW code and channel information stored in an address of a memory corresponding to the received address; Spreading a predetermined address acknowledgment signal signal with a received PN code and a UW code, and transmitting the spread address acknowledgment signal signal to a main body through a channel corresponding to the received channel information; Decoding a signal received from a channel corresponding to the received channel information into a read PN code and a UW code to determine whether the decoded signal is an ACK signal from the main body; If the decoded signal is an ACK signal from the main body, all processes are terminated.

1 is a diagram showing an example of a PN code, a UW code and channel information used in a spread spectrum wireless telephone;

2 is a schematic block diagram of a spread spectrum wireless telephone for transmitting and receiving data in a cradle state according to the present invention;

3 is a flowchart showing a state in which a main body transmits data in a cradle state of a spread spectrum wireless telephone according to the present invention;

4 is a diagram illustrating a state in which a cellular phone receives data from a main body in a cradle state of a spread spectrum wireless telephone according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: handset 20: main body

11, 21: RF module 12, 22: spread spectrum module

13, 23: coding / decoding module 14: handset

24: trunk line interface 15, 25: microcomputer

16, 26: memory 17, 27: virtual memory

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

2 shows a schematic block diagram of a handset 10 and a body 20 of a wireless telephone embodying the present invention.

As illustrated, RF modules 11 and 21 are configured in the handset 10 and the main body 20 for transmitting and receiving information through a channel (channel). Is connected to the spread spectrum modules 12 and 22. The spread spectrum modules 12 and 22 code the signals provided from the coding / decoding modules 13 and 23 to be described later in a spread spectrum manner and apply them to the RF modules 11 and 21, or the RF module The signal provided from (11) is decoded in a spread spectrum manner and applied to the coding / decoding modules (13) and (23).

The coding / decoding module 13 of the handset 10 is connected to the handset 14, converts an analog voice signal provided from the handset 14 into a digital signal, and applies it to the spread spectrum module 12 and spreads it. The digital signal provided from the spectrum module 12 is converted into an analog signal and applied to the handset 14.

The coding / decoding module 23 in the main body 20 is connected to the trunk line interface unit 24, converts an analog voice signal from the trunk line interface unit 24 into a digital signal, and applies the spread spectrum module 22 to the spread spectrum module 22. The digital signal from the spread spectrum module 22 is converted into an analog signal and applied to the trunk line interface unit 24.

In the handset 10 and the main body 20, the microcomputers 15 and 25 are configured, and the microcomputers 15 and 25 are the components of the wireless telephone 10 and the main body 20. The driving of the RF modules 11, 21, spread spectrum units 12, 22, coding / decoding modules 13, 23, and the like is controlled. The microcomputers 15 and 25 are connected to terminals P1 to P2, respectively, and the terminals P1 and P2 are configured to be interconnected in the cradle state. The microcomputers 15 and 25 may determine the cradle state by connecting the terminals P1 and P2.

In the microcomputers 15 and 25, memories 16 and 26 are formed, respectively, and in the memories 16 and 26, the PN codes PN1-PN10 and UW codes UW1-UW10 of FIG. And channel information CH1-CH12 are stored. The memories 16 and 26 store the same PN codes PN1-PN10, UW codes UW1-UW10 and channel information CH1-CH12 at the same address. In addition, the virtual memories 17 and 27 are configured in the microcomputers 15 and 25, and the specific addresses of the memories 16 and 26 are stored in the virtual memories 17 and 27.

In FIG. 3, the main body 20 transmits the PN code PN1-PN10, the UW code UW1-UW10, and the channel information CH1-CH12 to the handset 20 in the cradle state of the wireless telephone having the above-described configuration. A flowchart of the method is shown.

As shown, the microcomputer 25 determines whether it is in a cradle state (S11). It may be determined whether the terminals P1 and P2 are connected to each other as described above in the cradle state. In other words, the microcomputer 25 determines the cradle state when the terminals P1 and P2 are connected. If the main body 20 and the handset 10 are in a cradle state, the microcomputer 25 reads an address stored in the virtual memory 27 and transmits the address to the microcomputer 15 (S12). .

Here, the address stored in the virtual memory 27 means the address of the memory 26 in which the specific PN codes PN1-PN10, the UW codes UW1-UW10, and the channel information CH1-CH12 are stored. That is, the present invention does not transmit all of a specific PN code (PN1-PN10), UW code (UW-UW10), and channel information (CH1-CH12) to the handset 10, but the PN code (PN1-P1). The address of the memory 26 storing the PN10, the UW codes UW1-UW10 and the channel information CH1-CH12 is transmitted to the handset 10. FIG. The memory 16 in the handset 10 stores the same PN code (PN1-PN10), UW code (UW1-UW10) and channel information (CH1-CH12) as the memory 26 at the same address as the memory 26. Therefore, when the received address information is used, the microcomputer 15 of the handset 10 is configured by the main body 20 to which PN code (PN1-PN10), UW code (UW1-UW10), and channel information (CH1-CH12). It can be seen whether or not to transmit.

In step S13, the microcomputer 25 determines whether step S12 was performed without error. For example, while the microcomputer 25 performs the step S12, a state in which the power supply is cut off or the cradle state is released, such as the step S12 cannot be performed, may occur. It can be easily determined from. Therefore, the microcomputer 25 determines whether the address information has been transmitted to the handset 10 without such an error state, and when the address information is not transmitted due to an error or the like, a preset time (sufficient time for transmitting the address information). After (S14), the flow returns to step S11.

However, when the transfer of the address information is completed, the microcomputer 25 may store the PN codes (PN1-PN10) stored in the address stored in the memory 27, that is, the address of the memory 26 corresponding to the address transmitted to the handset 10, Read the UW code (UW1-UW10) and channel information (CH1-CH12) (S15), provide the read PN code (PN1-PN10), UW code (UW1-UW10) to the spread spectrum module 22 and Information CH1-CH12 is applied to the RF module 21 (S16).

The reason for performing steps S15 and S16) is as follows. When the handset 10 receives the address information in step S12, the address acknowledgment signal is transmitted to the main body 20. The transmitted address acknowledgment signal is a PN code (PN1-PN10) corresponding to the reception address, UW. And spreads the spread signals to the channels CH1-CH12 corresponding to the received addresses. Therefore, in order for the main body 20 to receive and detect the address acknowledgment signal, the reception channel is set to the RF module 21 with the channels CH1 to CH2 corresponding to the transmitted address, and the PN code corresponding to the transmitted address ( This is because the signals of the RF module 21 must be decoded by the PN1-PN10 and the UW codes UW1-UW10.

After performing step S16, the microcomputer 25 determines whether an address acknowledgment signal is applied from the handset 10 (S17). If the address acknowledgment signal is not applied from the handset 10, the microcomputer 25 may determine that the handset 10 has not received the address information or the address signal is distorted in the transmission process. Proceed to S14) and retransmit the address signal after a preset time elapses. However, when the address acknowledgment signal is received from the handset 10, the microcomputer 25 proceeds to step S18 to send an ACK signal to the handset 10 informing the handset 10 that the address acknowledgment signal has been received. send. The ACK signal also spreads to the PN codes PN1-PN10 and UW codes UW1-UW10 corresponding to the address in step S11, and transmits the spread signals to the channels CH1-CH12 corresponding to the addresses. Those skilled in the art will readily know.

After performing step S18, the microcomputer 25 determines whether the address stored in the virtual memory 27 corresponds to the highest value address of the memory 26 (S19), and if it corresponds to the highest value address, the virtual memory ( 27, the address is set to 0, that is, the minimum value address (S20), but when it does not correspond to the highest value address, the address value is incremented by 1 and reset (S21). The performance of step S19 can be easily implemented by the microcomputer 25 storing the highest value among the address values of the memory 26. That is, the microcomputer 25 may perform the step S19 by comparing the address value stored in the virtual memory 27 with the highest address value previously stored and determining whether the same is the same. Those who have knowledge will easily know.

Therefore, the address value in the virtual memory 27 is sequentially increased by 1 each time the above-described process is performed.

4 shows the PN code PN1-PN10, UW code UW1-UW10 and channel information CH1-CH12 transmitted by the main body 20 in the cradle state of the wireless telephone having the above-described configuration. A flow chart of this receiving method is shown.

As shown, the microcomputer 15 determines whether the current cradle is present (S31). It may be determined whether the cradle is connected to the terminals P1 and P2 as described above. In the cradle state, it is determined whether address information is applied from the microcomputer 25 of the main body 20 (S32). If the address information is not applied as a result of the determination in step S32, the microcomputer 15 proceeds to step S33, and after the preset time has elapsed, returns to step S31 to perform the above-described steps S31 and S32. Do it again.

However, when the address information is received, the microcomputer 15 stores the received address information in the virtual memory 17 (S34), and the PN codes (PN1-PN10) stored in the address of the memory 16 corresponding to the reception address. ), The UW codes UW1-UW10 and channel information CH1-CH12 are read (S35). The read PN codes PN1-PN10 and UW codes UW1-UW10 are applied to the spread spectrum module 12 to spread the predetermined address acknowledgment signal, and the read channel information CH1-CH12 is applied to the RF module. In step S36, the address acknowledgment signal applied and applied to the terminal 11 is transmitted to a channel corresponding to the read channel.

When the above-described address acknowledgment signal is applied to the main body 20, as described above, the main body 20 wirelessly transmits a preset ACK signal. As a result, the microcomputer 15 in the handset 10 receives the received address. The receiving channel of the RF module 21 is set to the corresponding channels CH1-CH2, and the signal of the RF module 21 is set to the PN code PN1-PN10 and the UW codes UW1-UW10 corresponding to the received address. The decoding determines whether an ACK signal is received (S37). As a result of the determination in step S37, when the ACK signal is received, both the main body 20 and the handset 10 have the PN codes PN1-PN10 and the UW codes UW1-UW10 of the address according to step S11 of FIG. And the link is formed by the channel information CH1-CH12, the microcomputer 15 finishes all processes. However, when the ACK signal is not received, the microcomputer 15 proceeds to step S33 because the main body 20 may not determine whether the address acknowledgment signal has been received or the address acknowledgment signal is distorted during the transmission process. After that, the address acknowledgment signal is retransmitted.

As described above, the present invention does not transmit the PN code (PN1-PN10), the UW code (UW1-UW10), and the channel information (CH1-CH12) to the handset in the cradle state of the wireless telephone, instead of the PN code (PN1-P1). PN10, UW codes UW1-UW10 and channel information CH1-CH12 transmit the addresses in the stored memory, thereby greatly reducing the transmission time.

Claims (2)

The preset PN codes PN1-PN10, UW codes UW1-UW10 and channel information CH1-CH12 are stored at the same addresses of the memory 16 and 26 in the handset 10 and the main body 20. The PN code of the main body 20 in a cradle state in a spread spectrum wireless telephone having a virtual memory 17 and 27 configured to store predetermined addresses of the memory 16 and 26 is stored. In the method for transmitting (PN1-PN10), UW code (UW1-UW10) and channel information (CH1-CH12) to the handset 10, Determining whether the cradle is in a state; Transmitting the address information in the virtual memory (27) to the handset (10) by wire when the cradle is in the cradle state; Reading a PN code (PN1-PN10), a UW code (UW1-UW10) and channel information (CH1-CH12) stored at an address of a memory (27) corresponding to the address transmitted to the handset (10); The signal received from the channel corresponding to the read channel information CH1-CH12 is decoded into the read PN code PN1-PN10 and the UW code UW1-UW10, and the decoded signal is the handset 10. Determining whether an address acknowledgment signal from the apparatus is received; If the decoded signal is an address acknowledgment signal from the handset 10, a predetermined ACK signal is spread by the read PN codes PN1-PN10 and UW codes UW1-UW10 and the spread ACK signal is distributed. Transmitting to the handset (10) via a channel corresponding to the read channel information (CH1-CH12); And if the decoded signal is not an address acknowledgment signal from the handset 10, further comprising retransmitting address information in the virtual memory 27 to the handset 10 by wire. Method of transmitting data in the cradle of a cordless phone. The preset PN codes PN1-PN10, UW codes UW1-UW10 and channel information CH1-CH12 are stored at the same addresses of the memory 16 and 26 in the handset 10 and the main body 20. In the spread spectrum type wireless telephone in which virtual memories 17 and 27 are stored, the predetermined addresses of the memories 16 and 26 are transmitted from the main body 20 in a cradle state. In the method in which the handset 10 receives a PN code (PN-PN10), a UW code (UW-UW10) and channel information (CH1-CH12), Determining whether the cradle is in a state; Receiving address information in the virtual memory (27) by wire from the main body (20) in the cradle state; Reading a PN code (PN1-PN10), a UW code (UW1-UW10) and channel information (CH1-CH12) stored at an address of a memory (17) corresponding to the received address; The predetermined address acknowledgment signal is spread with the received PN codes PN1-PN10 and UW codes UW1-UW10, and the spread address acknowledgment signal corresponds to the received channel information CH1-CH12. Transmitting to the main body (20) through a channel; The signal received from the channel corresponding to the received channel information CH1-CH12 is decoded into the read PN codes PN1-PN10 and UW codes UW1-UW10 so that the decoded signal is the main body 20. Determining whether it is an ACK signal from the apparatus; Terminating all processes if the decoded signal is an ACK signal from the main body (20); If the decoded signal is not an ACK signal from the main body 20, the cradle state of the spread spectrum wireless telephone further comprising the step of re-wired the address information in the virtual memory 27 from the main body 20. How to transfer data.