KR100300185B1 - Method for changing channel of mobile communication device and method thereof - Google Patents

Method for changing channel of mobile communication device and method thereof Download PDF

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KR100300185B1
KR100300185B1 KR1019930032177A KR930032177A KR100300185B1 KR 100300185 B1 KR100300185 B1 KR 100300185B1 KR 1019930032177 A KR1019930032177 A KR 1019930032177A KR 930032177 A KR930032177 A KR 930032177A KR 100300185 B1 KR100300185 B1 KR 100300185B1
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unit
signal
rssi
channel
outputs
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KR950022289A (en
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임윤구
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구자홍
엘지전자 주식회사
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/06—Reselecting a communication resource in the serving access point

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

PURPOSE: A method for changing a channel of a mobile communication device and a method thereof are provided to perform a tuning by converting into the better channel in case that a channel has a receiving sensitivity better than that of the currently calling paging channel of a mobile communication device. CONSTITUTION: A receiving duplex filter unit(10) filters a signal being supplied from an antenna(ANT2) and outputs signals of a necessary frequency band only. An amplifying unit(11) amplifies the supplied signal and outputs the signal to a mixer unit(12). The mixer unit(12) mixes a local oscillation frequency supplied from a frequency compounding unit(15) with the signal supplied from the amplifying unit(11) and outputs the mixed signal to an amplifying/filter unit(13). The amplifying/filter unit(13) amplifies and filters the signal supplied from the mixer unit(12) and detects a medium frequency signal and outputs a voice/RSSI detecting unit(14). The voice/RSSI detecting unit(14) detects a voice signal and an RSSI in the signal being applied from the amplifying/filter unit(13) and outputs the voice signal to a voice output unit and outputs the signal to the RSSI to a control unit(35). The frequency compounding unit(15) outputs the local oscillation frequency in accordance with a control signal from the control unit(35). A mixer(34) mixes the signal supplied from the amplifying unit(11) with the local oscillation frequency from a frequency compounding unit(31) and outputs the mixed signal to an amplifying/filter unit(32). The amplifying/filter unit(32) amplifies and filters the signal binge supplied from the mixer unit(34) and extracts a medium frequency signal and outputs the signal to an RSSI detecting unit(33). The RSSI detecting unit(33) detects an RSSI out of signals supplied from the amplifying/filter unit(32) and outputs the RSSI to a control unit(35). The control unit(35) controls the frequency compounding unit(31) on condition that a paging channel is tuned through a receiving circuit(20) and searches other paging channel. If an RSSI of a search channel supplied from the RSSI detecting unit(33) is bigger than an RSSI of the tuning voice/RSSI detecting unit(14), the control unit(35) controls the frequency compounding unit(15) for converting the paging channel to the searched corresponding channel and performing a tuning.

Description

이동통신기기의 채널전환장치 및 그 방법Channel switching device of mobile communication device and method

제1도는 종래 이동통신기기의 일부구성도1 is a partial configuration diagram of a conventional mobile communication device

제2도는 본 발명에 의한 이동통신기기의 구성도2 is a block diagram of a mobile communication device according to the present invention

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

10 : 수신듀플렉스필터부 11 : 증폭부10: receiving duplex filter unit 11: amplifying unit

12, 34 : 믹서부 13, 32 : 증폭/필터부12, 34: mixer section 13, 32: amplification / filter section

15, 31 : 주파수합성부 14 : 음성/RSSI 검출부15, 31: frequency synthesis unit 14: voice / RSSI detection unit

15, 31 : 주파수합성부 20 : 수신회로15, 31: frequency synthesizer 20: receiving circuit

30 : 채널 전환장치 35 : 제어부30: channel switching device 35: control unit

본 발명은 이동통신기기에 관한 것으로, 특히 이동통신기기가 현재 튜닝(Tunning)하고 있는 페이징 채널보다 수신감도가 더 양호한 채널이 있는 경우 양호한 채널로 전환하여 튜닝하도록 하는 이동통신기기의 채널전환장치 및 그 방법에 관한 것이다.The present invention relates to a mobile communication device, and in particular, a channel switching device of a mobile communication device for converting and tuning to a good channel when there is a channel having better reception sensitivity than a paging channel on which the mobile communication device is currently tuning. It's about how.

종래의 이동통신기기는 제1도에 도시된 바와 같이, 안테나(ANTI), 수신듀플렉스필터부(1), 증폭부(2) , 믹서부(3), 증폭/필터부(4), 음성/RSSI 검출부(5) 및 주파수 합성부(6)를 구비하여 이루어진다. 수신듀플렉스필터부(1)는 안테나 (ANTI)로부터 공급되는 신호를 여과하여 필요한 주파수 대역의 신호만을 증폭부(2)측으로 출력한다. 증폭부(2)는 공급된 신호를 증폭하여 믹서부(3)측으로 출력한다. 믹서부(3)는 주파수합성부(6)로부터 공급된 국부발진주파수와 증폭부(2)로부터 공급된 신호를 혼합하여 증폭/필터부(4)측으로 출력한다. 증폭/필터부(4)는 믹서부(3)로부터 공급된 신호를 증폭 및 여과하여 중간주파수신호를 검출해서 음성/RSSI 검출부(5)측으로 출력하며, 음성/RSSI 검출부(5)로부터 출력한 음성신호는 음성 출력부측으로 전달되고 RSSI(Receive Signal Strength Indicator)는 제어부측으로 전달된다. 또한, 주파수합성부(6)는 제어부로 부터의 제어신호에 따라 국부발진 주파수를 출력한다.In the conventional mobile communication device, as shown in FIG. 1, an antenna ANTI, a reception duplex filter unit 1, an amplifier unit 2, a mixer unit 3, an amplifier / filter unit 4, an audio / And an RSSI detector 5 and a frequency synthesizer 6. The receiving duplex filter unit 1 filters the signal supplied from the antenna ANTI and outputs only the signal of the required frequency band to the amplifying unit 2. The amplifier 2 amplifies the supplied signal and outputs it to the mixer 3 side. The mixer section 3 mixes the local oscillation frequency supplied from the frequency synthesizing section 6 and the signal supplied from the amplifying section 2 and outputs it to the amplification / filter section 4 side. The amplification / filter unit 4 amplifies and filters the signal supplied from the mixer unit 3, detects the intermediate frequency signal, outputs it to the voice / RSSI detection unit 5, and outputs the voice output from the voice / RSSI detection unit 5. The signal is transmitted to the voice output unit and the RSSI (Receive Signal Strength Indicator) is transmitted to the control unit. In addition, the frequency synthesizing section 6 outputs a local oscillation frequency in accordance with a control signal from the control section.

이상 설명한 바와 같은 종래의 이동통신기기는 아이들(idle)상태에서 어떤 페이징채널을 튜닝하고 있을때 오버헤드(overhead)메세지가 계속 수신되고 있는 동안은 현재의 채널보다 RSSI가 더 큰 페이징채널이 있는데도 불구하고 채널전환이 이루어지지 않기 때문에 현재 튜닝하고있는 채널의 수신감도가 약해져도 계속 튜닝하게 되는 문제점이 있다.As described above, the conventional mobile communication device has a paging channel that has a larger RSSI than the current channel while an overhead message is continuously received when tuning a certain paging channel in an idle state. Since channel switching is not performed, there is a problem that tuning continues even if the reception sensitivity of the channel currently being tuned is weakened.

본 발명은 전술한 바와 같은 문제점을 해결하기 위하여 안출된 것으로, 이동통신기기가 현재 통화하고 있는 페이징채널 보다 수신감도가 더 양호한 채널이 있는 경우 양호한 채널로 전환하여 튜닝하도록 하는 이동통신기기의 채널전환장치 및 그 방법을 제공하는데 목적이 있다.The present invention has been made to solve the problems described above, the channel switching of the mobile communication device to switch to tune to a good channel when there is a channel having a better reception sensitivity than the paging channel that the mobile communication is currently calling It is an object to provide an apparatus and a method thereof.

이와 같은 목적을 달성하기 위한 본 발명의 특징은, 기지국으로부터 무선 전송되는 신호를 수신하는 수신회로를 구비하는 이동통신기기에 있어서, 국부발진주파수 신호를 발생하는 주파수합성부와 ; 상기 수신회로로부터의 고주파신호와 상기 주파수합성부로 부터의 국부발진주파수 신호를 혼합하는 믹서부와 ; 상기 믹서부로 부터의 신호를 증폭 및 여파하여 중간 주파수신호를 추출하여 출력하는 증폭/필터부와 ; 상기 증폭/필터로부터 인가되는 중간주파수신호 중에서 RSSI를 검출하는 RSSI 검출부와 ; 상기 수신회로를 통해 페이징 체널을 튜닝하고 있는 상태에서 상기 주파수 합성부를 제어하는 다른 채널을 검색하여, 상기 RSSI 검출부를 통해 인가되는 해당 검색된 다른 채널의 RSSI가 상기 수신회로로부터의 RSSI보다 양호하면 검색된 다른 채널측으로 전환하여 페이징채널을 튜닝하도록 상기 수신회로를 제어하는 제어부를 포함하는데 있다.A feature of the present invention for achieving the above object is a mobile communication device having a receiving circuit for receiving a signal transmitted wirelessly from a base station, comprising: a frequency synthesizer for generating a local oscillation frequency signal; A mixer unit for mixing a high frequency signal from the receiving circuit and a local oscillation frequency signal from the frequency synthesizing unit; An amplifier / filter unit for amplifying and filtering the signal from the mixer unit to extract and output an intermediate frequency signal; An RSSI detector for detecting RSSI among intermediate frequency signals applied from the amplification / filter; Search for another channel controlling the frequency synthesizer while tuning a paging channel through the receiving circuit, and if the RSSI of the other searched channel applied through the RSSI detector is better than the RSSI from the receiving circuit, And a control unit for controlling the receiving circuit to switch to the channel side to tune the paging channel.

한편, 본 발명의 또 다른 특징은, 이동통신기기에 있어서, 페이징 채널을 튜닝하는 과정과 ; 상기 페이징채널을 튜닝한 상태에서 다른 채널을 검색하여, 해당 검색된 다른 채널의 RSSI를 검출하는 과정과 ; 상기 검색된 다른 채널의 RSSI가 상기 튜닝한 페이징채널의 RSSI 보다 양호하면 상기 검색된 다른 채널측으로 전환하여 페이징채널을 튜닝하는 과정을 포함하는데 있다.On the other hand, another feature of the present invention, in the mobile communication device, the process of tuning the paging channel; Searching for another channel while tuning the paging channel and detecting RSSI of the found other channel; And if the searched RSSI of the other channel is better than the tuned paging channel, the switching to the searched other channel side to tune the paging channel.

이하 첨부된 도면을 참조하여 본 발명의 실시예를 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

본 발명에 의한 이동통신기기는 제2도에 도시된 바와 같이 수신회로(20)와 채널전환장치(30)을 구비하여 이루어진다. 수신회로(20)는 수신 듀플레스 필터부(10), 증폭부(11), 믹서부(12), 증폭/밀터부(13), 음성/RSSI 검출부(14) 및 주파수합성부(15)를 구비하여 이루어지며, 채널전환장치(30)는 주파수합성부(31), 증폭/필터부(32), RSSI 검출부(33), 믹서(34) 및 제어부(35)를 구비하여 이루어진다.The mobile communication device according to the present invention comprises a receiving circuit 20 and a channel switching device 30 as shown in FIG. The receiving circuit 20 includes a receiving duplex filter unit 10, an amplifier unit 11, a mixer unit 12, an amplifier / mirror unit 13, an audio / RSSI detector 14, and a frequency synthesizer 15. The channel switching device 30 includes a frequency synthesizer 31, an amplifier / filter unit 32, an RSSI detector 33, a mixer 34, and a controller 35.

수신회로(20)의 수신 듀플렉스 필터부(10)은 안테나 (ANT2)로부터 공급되는 신호를 여과하여 필요한 주파수 대역의 신호만을 증폭부(11)측으로 출력한다. 증폭부(11)는 공급된 신호를 증폭하여 믹서부(12)축으로 출력한다. 믹서부(12)는 주파수합성부(15)로 부터 공급된 국부발진주파수와 증폭부(11)로부터 공급된 신호를 혼합하여 증폭/필터부(13)축으로 출력한다. 증폭/필터부(13)는 믹서부(12)로부터 공급된 신호를 증폭 및 여파하여 중간주파수신호를 검출해서 음성/RSSI 검출부(14)측으로 출력하며 음성/RSSI 검출부(14)는 증폭/필터부(13)로부터 인가되는 신호에서 음성신호와 RSSI를 검출하여 출력하되 음성신호는 음성출력부측으로 출력하고 RSSI 는 제어부(35)측으로 출력한다. 또한, 주파수합성부(15)는 제어부(35)로부터의 제어신호에 따라 국부발진 주파수를 출력한다.The receiving duplex filter unit 10 of the receiving circuit 20 filters the signal supplied from the antenna ANT2 and outputs only the signal of the required frequency band to the amplifying unit 11 side. The amplifier 11 amplifies the supplied signal and outputs the signal to the mixer 12 shaft. The mixer unit 12 mixes the local oscillation frequency supplied from the frequency synthesizing unit 15 and the signal supplied from the amplifying unit 11 and outputs the signal to the amplification / filter unit 13 axis. The amplifier / filter unit 13 amplifies and filters the signal supplied from the mixer unit 12, detects an intermediate frequency signal, and outputs the signal to the voice / RSSI detector 14, and the voice / RSSI detector 14 is an amplifier / filter unit. The audio signal and RSSI are detected and output from the signal applied from (13), but the audio signal is output to the voice output unit and the RSSI is output to the control unit 35. The frequency synthesizing unit 15 also outputs a local oscillation frequency in accordance with a control signal from the control unit 35.

채널전환방식(30)의 믹서(34)는 중폭부(11)로부터 공급된 신호와 주파수합성부(31)로부터의 국부발진주파수를 혼합하여 증폭/필터부(32)측으로 출력하며, 증폭/필터부(32)는 믹서(34)로부터 공급되는 신호를 증폭 및 여파하여 중간주파수신호를 추출해서 RSSI 검출부(33)측으로 출력한다. RSSI검출부(33)는 증폭/필터부(32)로부터 공급된 신호중에서 RSSI를 검출하여 제어부(35)측으로 출력한다. 제어부(35)는 수신회로(20)를 통해 페이징채널을 튜닝하고 있는 상태에서 주파수합성부(31)를 제어하여 다른 페이징채널을 검색하는데, RSSI 검출부(33)로부터 공급된 검색채널의 RSSI 가 튜닝중인 음성/RSSI 검출부(14)의 RSSI 보다 큰 경우 검색된 해당 채널측으로 페이징채널을 전환하여 튜닝하도록 주파수합성부(15)를 제어한다.The mixer 34 of the channel switching method 30 mixes the signal supplied from the medium width section 11 and the local oscillation frequency from the frequency synthesizing section 31 and outputs it to the amplification / filter section 32, and amplifies / filters. The unit 32 amplifies and filters the signal supplied from the mixer 34, extracts the intermediate frequency signal, and outputs the intermediate frequency signal to the RSSI detection unit 33 side. The RSSI detector 33 detects the RSSI from the signal supplied from the amplifier / filter unit 32 and outputs it to the controller 35 side. The control unit 35 searches for another paging channel by controlling the frequency synthesizer 31 while the paging channel is tuned through the receiving circuit 20, and the RSSI of the search channel supplied from the RSSI detector 33 is tuned. If the voice / RSSI detection unit 14 is larger than the RSSI, the frequency synthesizer 15 is controlled to switch and tune the paging channel to the found channel side.

이상 설명한 바와같이 본 발명은 수신회로를 통해 페이징채널에 튜닝된 상태에서 현재 튜닝중인 채널이외의 다른 채널이외의 다른 채널들에 대하여 RSSI를 측정하여 현재 튜닝중인 채널보다 더 양호한 채널이 있으며 그 채널로 페이징채널을 전환하여 튜닝하므로 아이들상태에서도 항상 수신감도가 가장 좋은 채널을 튜닝할 수 있다.As described above, the present invention provides a better channel than the channel currently being tuned by measuring RSSI for channels other than the channel currently being tuned while tuned to the paging channel through the receiving circuit. By switching the paging channel, you can always tune the channel with the best reception sensitivity even in the idle state.

Claims (2)

기지국으로부터 무선 전송되는 신호를 수신하는 수신회로를 구비하는 이동통신기기에 있어서, 국부발진주파수 신호를 발생하는 주파수합성부와 ; 상기 수신회로로 부터의 고주파신호와 상기 주파수 합성부로 부터의 국부발진주파수 신호를 혼합하는 믹서부와 ; 상기 믹서부로 부터의 신호를 증폭 및 여파하여 중간 주파수신호를 추출하여 출력시는 증폭/필터부와 ; 상기증폭/필터부로부터 인가되는 중간주파수신호 중에서 RSSI를 검출하는 RSSI 검출부와 ; 상기 수신회로를 통해 페이징채널을 튜닝하고 있는 상태에서 상기 주파수 합성부를 제어하여 다른 채널을 검색하여, 상기 RSSI 검출부를 통해 인가되는 해당 검색된 다른 채널의 RSSI 가 상기 수신회로로부터의 RSSI 보다 양호하면 검색된 다른 채널측으로 전환하여 페이징 채널을 튜닝하도록 상기 수신회로를 제어하는 제어부를 포함하는 것을 특징으로 하는 이동통신기기의 채널전환장치.A mobile communication device comprising a receiving circuit for receiving a signal wirelessly transmitted from a base station, comprising: a frequency synthesizing unit for generating a local oscillation frequency signal; A mixer unit for mixing a high frequency signal from the receiving circuit and a local oscillation frequency signal from the frequency synthesizing unit; Amplifying / filtering the signal from the mixer and extracting and outputting an intermediate frequency signal; An RSSI detector for detecting RSSI among intermediate frequency signals applied from the amplifier / filter unit; While the paging channel is tuned through the receiving circuit, the frequency synthesizer is controlled to search for another channel, and if the RSSI of the corresponding other channel applied through the RSSI detector is better than the RSSI from the receiving circuit, And a control unit for controlling the receiving circuit to switch to the channel side to tune the paging channel. 이동통신기기에 있어서. 페이징채널을 튜닝하는 과정과 ; 상기 페이징채널을 튜닝한 상태에서 다른 채널을 검색하여, 해당 검색된 다른 채널의 RSSI를 검출하는 과정과 ; 상기 검색된 다음 채널의 RSSI가 상기 튜닝한 페이징채널의 RSSI 보다 양호하면 상기 검색된 다른 채널측으로 전환하여 페이징채널을 튜닝하는 과정을 포함하는 것을 특징으로 하는 이동통신기기의 채널 전환방법.In mobile communication devices. Tuning the paging channel; Searching for another channel while tuning the paging channel and detecting RSSI of the found other channel; And if the RSSI of the next searched channel is better than the RSSI of the tuned paging channel, switching to another searched channel and tuning a paging channel.
KR1019930032177A 1993-12-31 1993-12-31 Method for changing channel of mobile communication device and method thereof KR100300185B1 (en)

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Citations (1)

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Publication number Priority date Publication date Assignee Title
KR930011414A (en) * 1991-11-26 1993-06-24 정용문 Frequency automatic tuning system of specific broadcasting and its method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR930011414A (en) * 1991-11-26 1993-06-24 정용문 Frequency automatic tuning system of specific broadcasting and its method

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