JPH0897762A - Repeater for mobile communication - Google Patents
Repeater for mobile communicationInfo
- Publication number
- JPH0897762A JPH0897762A JP6267982A JP26798294A JPH0897762A JP H0897762 A JPH0897762 A JP H0897762A JP 6267982 A JP6267982 A JP 6267982A JP 26798294 A JP26798294 A JP 26798294A JP H0897762 A JPH0897762 A JP H0897762A
- Authority
- JP
- Japan
- Prior art keywords
- mobile communication
- frequency
- repeater
- radio wave
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】この発明は、携帯電話あるいは携
帯データ通信端末等の、いわゆる移動体通信用の中継装
置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called mobile communication relay device such as a mobile phone or a mobile data communication terminal.
【0002】[0002]
【従来の技術】一般に移動体通信は、移動体通信基地局
と移動体通信端末との間で電波を利用した無線通信を行
っている。2. Description of the Related Art Generally, in mobile communication, radio communication using radio waves is performed between a mobile communication base station and a mobile communication terminal.
【0003】ところが、電波は障害物を通過しにくいた
め、従来は、利用者が電波の到達しにくい環境にいる場
合には、使用できないことが多かった。例えば、携帯電
話の場合には、利用者がビルの内部にいる場合には、電
波がコンクリート壁などに阻まれるため、通話のできな
いことが多かった。However, since radio waves do not easily pass through obstacles, in the past, it has often been impossible to use them when the user is in an environment where radio waves are hard to reach. For example, in the case of a mobile phone, when a user is inside a building, radio waves are often blocked by a concrete wall or the like, so that it is often impossible to make a call.
【0004】[0004]
【発明が解決しようとする課題】従って、移動体通信端
末所持者が自らの位置を変えて、電波が十分に届く場所
に移動して回線を確保する必要があった。例えば、携帯
電話の場合には、利用者がビルの中にいる場合には、利
用者は窓際に移動するなどして、通話を行う必要があっ
た。Therefore, it has been necessary for the holder of the mobile communication terminal to change his / her position and move to a place where the radio wave reaches sufficiently to secure the line. For example, in the case of a mobile phone, when the user is in a building, the user needs to make a call by moving to the window.
【0005】このように電波の到達範囲が限られるため
に、移動体通信端末の使用可能な場所が制限され、任意
の場所で移動体通信を使用できないことは、利用者にと
って非常に不便なことであった。Since the reach of radio waves is limited in this way, the usable place of the mobile communication terminal is limited, and it is very inconvenient for the user that mobile communication cannot be used at any place. Met.
【0006】本発明は、上記のような制限を解消し、電
波の直接届きにくい場所での通信を可能にし、通信ので
きる環境を大幅に拡大することを目的として発明された
ものである。The present invention was invented for the purpose of solving the above-mentioned restrictions, enabling communication in a place where radio waves cannot reach directly, and greatly expanding the environment in which communication is possible.
【0007】[0007]
【課題を解決するための手段】上記の目的を達成させる
ための手段を説明すると、本発明は、移動体通信基地局
の電波を中継する装置(以下リピータ1という)と、移
動体通信端末の電波を中継する装置(以下リピータ2と
いう)と、から構成され、リピータ1は、移動体通信に
用いられる第1周波数の電波を送受信する回路と、該第
1周波数とは異なる第2周波数の電波を送受信する回路
と、該第1周波数と該第2周波数とを相互に変換する周
波数変換回路と、を合わせ持ち、リピータ2は、該第2
周波数の電波を送受信する回路と、該第1周波数と該第
2周波数とを相互に変換する周波数変換回路と、を合わ
せ持つ。Means for achieving the above object will be described. The present invention relates to a device for relaying radio waves of a mobile communication base station (hereinafter referred to as a repeater 1) and a mobile communication terminal. The repeater 1 includes a circuit for transmitting and receiving a radio wave of a first frequency used for mobile communication, and a radio wave of a second frequency different from the first frequency. And a frequency conversion circuit for mutually converting the first frequency and the second frequency, and the repeater 2 includes the second
A circuit for transmitting and receiving radio waves of a frequency and a frequency conversion circuit for mutually converting the first frequency and the second frequency are provided together.
【0008】また、リピータ2は移動体通信端末接続用
のアンテナ端子を合わせ持つ。The repeater 2 also has an antenna terminal for connecting a mobile communication terminal.
【0009】すなわち、(a)リピータ1については、
移動体通信に用いられる第1周波数の電波を送受信する
回路は、移動体通信用周波数送受信回路(12)であ
り、該第1周波数とは異なる第2周波数の電波を送受信
する回路は、リピータ間通信用周波数送受信回路(1
3)であり、該第1周波数と該第2周波数とを相互に変
換する周波数変換回路は、周波数変換回路(14)であ
る。また、該第1周波数と該第2周波数はアンテナ(1
1)から受発信される。That is, for (a) repeater 1,
A circuit for transmitting and receiving radio waves of a first frequency used for mobile communication is a frequency transmitting and receiving circuit for mobile communication (12), and a circuit for transmitting and receiving radio waves of a second frequency different from the first frequency is between repeaters. Communication frequency transceiver circuit (1
3), and the frequency conversion circuit for mutually converting the first frequency and the second frequency is the frequency conversion circuit (14). In addition, the first frequency and the second frequency are
Received and sent from 1).
【0010】また、(b)リピータ2については、該第
2周波数の電波を送受信する回路は、リピータ間通信用
周波数送受信回路(102)であり,該第1周波数と該
第2周波数とを相互に変換する周波数変換回路は、周波
数変換回路(103)であり、移動体通信端末接続用の
アンテナ端子は、移動体通信端末接続用アンテナ端子
(104)である。また、該第2周波数はアンテナ(1
01)から受発信される。Further, (b) in the repeater 2, the circuit for transmitting and receiving the radio wave of the second frequency is the inter-repeater communication frequency transmitting / receiving circuit (102), and the first frequency and the second frequency are mutually exchanged. The frequency conversion circuit for converting to is a frequency conversion circuit (103), and the antenna terminal for mobile communication terminal connection is the mobile communication terminal connection antenna terminal (104). The second frequency is the antenna (1
01) is sent and received.
【0011】[0011]
【作用】その作用を図2に基づいて説明すると、図1
(a)移動体通信基地局の電波を中継する装置(リピー
タ1)はリピータ1(22)であり、図1(b)移動体
通信端末の電波を中継する装置(リピータ2)はリピー
タ2(22)であって、移動体通信基地局(21)と移
動体通信端末(24)との間の通信において、リピータ
1(22)は、移動体通信に使用される電波(25)を
受信し、それをリピータ間の通信に使用する周波数帯の
電波(26)に変換しリピータ2に送信する。リピータ
2(23)は、受信したリピータ1からの電波(26)
を周波数変換を施すことによって元の周波数に戻し、ア
ンテナ端子を通じて移動体通信端末(24)に伝送す
る。また、移動体通信端末(24)から送信される電波
は、アンテナ端子を通じてリピータ2(23)に入り、
そこでリピータ通信用の周波数に変換された電波(2
6)としてリピータ1に向けて送信される。リピータ1
(22)は受信した電波(26)を元の移動体通信用の
電波(25)に変換して送信し、移動体通信基地局(2
1)はこれを受信する。The operation will be described with reference to FIG.
(A) The device (repeater 1) that relays the radio waves of the mobile communication base station is the repeater 1 (22), and the device (repeater 2) that relays the radio waves of the mobile communication terminal is the repeater 2 (22). 22), in the communication between the mobile communication base station (21) and the mobile communication terminal (24), the repeater 1 (22) receives the radio wave (25) used for mobile communication. , And converts it into a radio wave (26) in the frequency band used for communication between repeaters and transmits it to the repeater 2. The repeater 2 (23) receives the radio wave (26) from the repeater 1 received.
Is returned to the original frequency by frequency conversion and transmitted to the mobile communication terminal (24) through the antenna terminal. In addition, the radio wave transmitted from the mobile communication terminal (24) enters the repeater 2 (23) through the antenna terminal,
Therefore, the radio wave converted to the frequency for repeater communication (2
6) is transmitted to the repeater 1. Repeater 1
(22) converts the received radio wave (26) into the original radio wave for mobile communication (25) and transmits the original radio wave (25), and the mobile communication base station (2)
1) receives this.
【0012】従って、従来、移動体通信端末(24)が
移動体通信基地局(21)からの電波を直接受けられな
い、あるいは、移動体通信基地局(21)が移動体通信
端末(24)の電波を直接受けられない場合でも、リピ
ータ1(22)を電波(25)が確実に届く場所に設置
すれば、移動体通信端末(24)はリピータ2(23)
を接続することによって、リピータ1(22)を経由し
て移動体通信基地局との通信回線を確立できる。Therefore, conventionally, the mobile communication terminal (24) cannot directly receive the radio wave from the mobile communication base station (21), or the mobile communication base station (21) has the mobile communication terminal (24). If the repeater 1 (22) is installed in a place where the radio wave (25) can reach reliably, the mobile communication terminal (24) can repeat the repeater 2 (23)
By connecting with, it is possible to establish a communication line with the mobile communication base station via the repeater 1 (22).
【0013】すなわち、利用者が、移動体通信基地局か
らの電波が直接届かない場所にいても、リピータ1を移
動体通信基地局と電波を確実に交信できる場所に設置
し、リピータ1及びリピータ2を経由することで、容易
に移動体通信基地局と移動体通信端末との通信回線を確
立でき、通信を行うことができる。That is, even if the user is in a place where the radio wave from the mobile communication base station does not reach directly, the repeater 1 is installed in a place where the radio wave can be surely communicated with the mobile communication base station. By passing through 2, the communication line between the mobile communication base station and the mobile communication terminal can be easily established and communication can be performed.
【0014】[0014]
【実施例】本発明の実施例を図3及び図4に基づき詳細
に説明する。Embodiments of the present invention will be described in detail with reference to FIGS.
【0015】移動体通信基地局からの送信周波数(すな
わち移動体通信端末においては受信周波数)と、移動体
通信基地局の受信周波数(すなわち移動体通信端末にお
いては送信周波数)とが異なる移動体通信システムにお
ける実施例を、図3に基づき説明する。Mobile communication in which the transmission frequency from the mobile communication base station (that is, the reception frequency in the mobile communication terminal) and the reception frequency in the mobile communication base station (that is, the transmission frequency in the mobile communication terminal) are different An example of the system will be described with reference to FIG.
【0016】まず、リピータ1については、移動体通信
基地局から送信された電波(例えば800MHz)はア
ンテナ(31)で受信され、高周波フィルタ(33)を
通過した後、フロントエンド(37)で増幅され、局部
発信器(40)の周波数(例えば200MHz)とミキ
シングされ、周波数変換される(この場合は1000M
Hz)。周波数変換された信号は、帯域増幅器(36)
で増幅され、高周波フィルタ(32)を通り、アンテナ
(31)から放射される。移動体通信端末からリピータ
2を経由して送信された電波(例えば1050MHz)
は、アンテナ(31)で受信され、高周波フィルタ(3
4)を通り、フロントエンド(38)で増幅され、局部
発信器(40)の周波数とミキシングされ周波数変換さ
れた信号(この場合は850MHz)となる。周波数変
換された信号は、帯域増幅器(39)で増幅され、高周
波フィルタ(35)を通過して、アンテナ(31)から
移動体通信基地局に向けて送信される。First, in the repeater 1, the radio wave (for example, 800 MHz) transmitted from the mobile communication base station is received by the antenna (31), passes through the high frequency filter (33), and is then amplified by the front end (37). Is mixed with the frequency (for example, 200 MHz) of the local oscillator (40) and frequency converted (in this case, 1000 M).
Hz). The frequency-converted signal is supplied to the band amplifier (36).
Is amplified by, passes through the high frequency filter (32), and is radiated from the antenna (31). Radio waves transmitted from mobile communication terminals via repeater 2 (eg 1050 MHz)
Is received by the antenna (31), and the high frequency filter (3
4), the signal is amplified by the front end (38), mixed with the frequency of the local oscillator (40) and frequency-converted (850 MHz in this case). The frequency-converted signal is amplified by the band amplifier (39), passes through the high frequency filter (35), and is transmitted from the antenna (31) to the mobile communication base station.
【0017】次に、リピータ2については、リピータ1
から送信された電波(この場合は1000MHz)は、
高周波フィルタ(302)を通過した後にフロントエン
ド(304)で増幅され、局部発信器(309)の周波
数(この場合は200MHz)とミキシングされ、もと
の周波数(この場合は800MHz)に戻され、高周波
フィルタ(306)を通過しアンテナ端子(308)経
由で、移動体通信端末に送り込まれる。移動体通信端末
からの送信波(この場合は850MHz)はアンテナ端
子(308)から入り、高周波フィルタ(307)を通
過したあと、局部発信器(309)の周波数(この場合
は200MHz)とミキシングされ周波数変換(この場
合は1050MHz)されて、帯域増幅器(305)に
入り、高周波フィルタ(303)を通過してアンテナ
(301)からリピータ1に向けて送信される。Next, for repeater 2, repeater 1
The electric wave (1000MHz in this case) transmitted from
After passing through the high frequency filter (302), it is amplified by the front end (304), mixed with the frequency of the local oscillator (309) (200 MHz in this case), and returned to the original frequency (800 MHz in this case). It passes through the high frequency filter (306) and is sent to the mobile communication terminal via the antenna terminal (308). The transmission wave (850 MHz in this case) from the mobile communication terminal enters from the antenna terminal (308), passes through the high frequency filter (307), and is then mixed with the frequency of the local oscillator (309) (200 MHz in this case). The frequency is converted (1050 MHz in this case), enters the band amplifier (305), passes through the high frequency filter (303), and is transmitted from the antenna (301) toward the repeater 1.
【0018】なお、移動体通信基地局からの送信周波数
(すなわち移動体通信端末においては受信周波数)と、
移動体通信基地局の受信周波数(すなわち移動体通信端
末においては送信周波数)とが同一の移動体通信システ
ムの場合は、一般に、時間軸上で送受信を切り替えるこ
とによって同一の周波数を利用し通信を行っているた
め、本発明のこの場合の実施例を図3に基づいて次に説
明する。The transmission frequency from the mobile communication base station (that is, the reception frequency in the mobile communication terminal),
In the case of a mobile communication system in which the reception frequency of the mobile communication base station (that is, the transmission frequency in the mobile communication terminal) is the same, communication is generally performed by switching the transmission / reception on the time axis. Since this is done, an embodiment of the present invention in this case will be described below with reference to FIG.
【0019】まず、リピータ1については、高周波フィ
ルタ(33)と高周波フィルタ(35)を同一周波数帯
(例えば870MHz帯)にし、さらに高周波フィルタ
(32)と高周波フィルタ(34)を同一周波数帯(例
えば1070MHz帯)とすることによって実施でき
る。又は、送受信制御回路を付加することにより、高周
波フィルタ(34)、高周波フィルタ(35)、フロン
トエンド(38)及び帯域増幅器(39)を取り除いた
形で回路を構成することでも実施できる。First, in the repeater 1, the high frequency filter (33) and the high frequency filter (35) are in the same frequency band (for example, 870 MHz band), and the high frequency filter (32) and the high frequency filter (34) are in the same frequency band (for example, 870 MHz band). 1070 MHz band). Alternatively, by adding a transmission / reception control circuit, the circuit can be configured by removing the high frequency filter (34), the high frequency filter (35), the front end (38) and the band amplifier (39).
【0020】次に、リピータ2については、高周波フィ
ルタ(302)と高周波フィルタ(303)を同一周波
数帯(この場合は1070MHz帯)にし、さらに、高
周波フィルタ(306)と高周波フィルタ(307)を
同一周波数帯(この場合は870MHz帯)とすること
によって実施できる。又は、送受信制御回路を付加する
ことにより、高周波フィルタ(303)、高周波フィル
タ(307)を取り除いた形で回路を構成することでも
実施できる。Next, in the repeater 2, the high frequency filter (302) and the high frequency filter (303) are in the same frequency band (1070 MHz band in this case), and the high frequency filter (306) and the high frequency filter (307) are the same. It can be implemented by setting the frequency band (in this case, the 870 MHz band). Alternatively, by adding a transmission / reception control circuit, the circuit can be configured by removing the high frequency filter (303) and the high frequency filter (307).
【0021】[0021]
【発明の効果】従って、本発明によって、移動体通信
で、利用者が移動体通信基地局からの電波が届きにくい
環境にいても、本装置のリピータ1を移動体通信基地局
からの電波が確実に届く場所に設置し、リピータ2を移
動体通信端末に接続することにより、リピータ間の交信
範囲において自由に移動でき、容易に移動体通信を行う
ことができるので、利用者は移動体通信の使用可能な環
境を大幅に拡大することができる。Therefore, according to the present invention, in mobile communication, even when the user is in an environment in which the radio wave from the mobile communication base station is hard to reach, the repeater 1 of the present apparatus can receive the radio wave from the mobile communication base station. By installing the repeater 2 in a place that can be reliably reached and connecting the repeater 2 to a mobile communication terminal, the user can freely move within the communication range between repeaters and easily perform mobile communication. The usable environment of can be greatly expanded.
【0022】すなわち、例えば、携帯電話の場合、利用
者がビルの中などの移動体通信基地局からの電波が届き
にくい環境にいても、本装置のリピータ1を、窓際など
の、移動体通信基地局からの電波が確実に届く場所に設
置し、リピータ2を自分の所持する移動体通信端末に接
続することにより、自らはリピータ間の交信範囲におい
て自由に移動でき、容易に通信を行うことができる。こ
のため、従来あった携帯電話の使用場所に関する制限を
大幅に解消することができる。That is, for example, in the case of a mobile phone, even if the user is in an environment where the radio waves from the mobile communication base station are hard to reach, such as in a building, the repeater 1 of this device is used for mobile communication such as at the window. Install it in a place where the radio wave from the base station can reach surely, and connect the repeater 2 to the mobile communication terminal you own, so that you can move freely within the communication range between repeaters and easily communicate. You can For this reason, it is possible to largely eliminate the conventional restrictions on the place of use of the mobile phone.
【0023】なお、本発明は、リピータ2において、移
動体通信に用いられる周波数の電波を送受信する回路を
合わせ持った場合には、リピータ2と移動体通信端末と
の間の交信はアンテナ端子を利用せず、無線によっても
行うことができ、この場合でも同じ効果が得られる。According to the present invention, when the repeater 2 also has a circuit for transmitting and receiving radio waves of a frequency used for mobile communication, communication between the repeater 2 and the mobile communication terminal is performed through the antenna terminal. It can be performed wirelessly without being used, and the same effect can be obtained in this case as well.
【0024】なお、本発明は、1つのリピータ1を複数
のリピータ2が同時に共用することができる。図4はそ
の場合の実施例であり、1つのリピータ1を複数のリピ
ータ2が同時に共用する場合のシステム構成図である。In the present invention, one repeater 1 can be shared by a plurality of repeaters 2 at the same time. FIG. 4 is an embodiment in that case, and is a system configuration diagram in the case where one repeater 1 is shared by a plurality of repeaters 2 at the same time.
【0025】[0025]
図1は本発明の構成図 (a)移動体通信基地局の電波を中継する装置(リピー
タ1) (b)移動体通信端末の電波を中継する装置(リピータ
2) 図2は本発明を使用した移動体通信のシステム構成図 図3は本発明の実施例を示した回路構成図 (a)リピータ1の回路構成 (b)リピータ2の回路構成 図4は一つのリピータ1を複数のリピータ2で共用する
場合の実施例を示したシステム構成図FIG. 1 is a block diagram of the present invention. (A) Device for relaying radio waves from a mobile communication base station (repeater 1) (b) Device for relaying radio waves from a mobile communication terminal (repeater 2) FIG. 2 uses the present invention FIG. 3 is a circuit configuration diagram showing an embodiment of the present invention. (A) Circuit configuration of repeater 1 (b) Circuit configuration of repeater 2 FIG. 4 shows one repeater 1 with a plurality of repeaters 2. Configuration diagram showing an example of sharing with
【0026】[0026]
11 アンテナ 12 移動体通信周波数送受信回路 13 リピータ間通信周波数送受信回路 14 周波数変換回路 101 アンテナ 102 リピータ間通信周波数送受信回路 103 周波数変換回路 104 移動体通信端末接続用アンテナ端子 21 移動体通信基地局 22 リピータ1 23 リピータ2 24 移動体通信端末 25 移動体通信に使用される電波 26 リピータ間通信に使用される電波 31 アンテナ 32 高周波フィルタ 33 高周波フィルタ 34 高周波フィルタ 35 高周波フィルタ 36 帯域増幅器 37 フロントエンド 38 フロントエンド 39 帯域増幅器 40 局部発信器 301 アンテナ 302 高周波フィルタ 303 高周波フィルタ 304 フロントエンド 305 帯域増幅器 306 高周波フィルタ 307 高周波フィルタ 308 アンテナ端子 309 局部発信器 401 リピータ1 402 リピータ2 403 移動体通信端末 404 リピータ間通信に使用される電波 11 antenna 12 mobile communication frequency transmitting / receiving circuit 13 inter-repeater communication frequency transmitting / receiving circuit 14 frequency conversion circuit 101 antenna 102 inter-repeater communication frequency transmitting / receiving circuit 103 frequency conversion circuit 104 mobile communication terminal connection antenna terminal 21 mobile communication base station 22 repeater 1 23 Repeater 2 24 Mobile Communication Terminal 25 Radio Wave Used for Mobile Communication 26 Radio Wave Used for Repeater Communication 31 Antenna 32 High Frequency Filter 33 High Frequency Filter 34 High Frequency Filter 35 High Frequency Filter 36 Band Amplifier 37 Front End 38 Front End 39 band amplifier 40 local oscillator 301 antenna 302 high frequency filter 303 high frequency filter 304 front end 305 band amplifier 306 high frequency filter 307 high frequency filter 08 an antenna terminal 309 local oscillator 401 radio waves used for communication between the repeater 1 402 repeater 2 403 mobile communication terminal 404 Repeater
Claims (1)
る装置で、移動体通信基地局の電波を中継する装置は、 該移動体通信に用いられる第1周波数の電波を送受信す
る回路と、 該第1周波数とは異なる第2周波数の電波を送受信する
回路と、 該第1周波数と該第2周波数とを相互に変換する周波数
変換回路と、を合わせ持つことを特徴とし、移動体通信
端末の電波を中継する装置は、 該第2周波数の電波を送受信する回路と、 該第1周波数と該第2周波数とを相互に変換する周波数
変換回路と、を合わせ持つことを特徴とする装置。1. In mobile communication, a device configured to relay a radio wave of a mobile communication base station, and a device relaying a radio wave of a mobile communication terminal, wherein the radio wave of the mobile communication base station is transmitted. The relay device includes a circuit for transmitting and receiving radio waves of a first frequency used for mobile communication, a circuit for transmitting and receiving radio waves of a second frequency different from the first frequency, the first frequency and the second frequency. A device for relaying radio waves of a mobile communication terminal has a circuit for transmitting and receiving radio waves of the second frequency, a frequency conversion circuit for mutually converting A device having a frequency conversion circuit for converting two frequencies to each other.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6267982A JPH0897762A (en) | 1994-09-26 | 1994-09-26 | Repeater for mobile communication |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6267982A JPH0897762A (en) | 1994-09-26 | 1994-09-26 | Repeater for mobile communication |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0897762A true JPH0897762A (en) | 1996-04-12 |
Family
ID=17452274
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6267982A Pending JPH0897762A (en) | 1994-09-26 | 1994-09-26 | Repeater for mobile communication |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0897762A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100491088B1 (en) * | 2002-08-19 | 2005-05-24 | 주식회사 케이티프리텔 | Mobile communication repeater system using frequency conversion method |
JP2006510326A (en) * | 2002-12-16 | 2006-03-23 | ワイデファイ インコーポレイテッド | Improved wireless network repeater |
WO2006080693A1 (en) * | 2004-10-06 | 2006-08-03 | Ktfreetel Co., Ltd. | Method for mobile communication service using dedicated frequency and apparatus thereof |
JP2009530972A (en) * | 2006-03-20 | 2009-08-27 | アルカテル−ルーセント ユーエスエー インコーポレーテッド | Completing an emergency call over the network with a malfunctioning backhaul communication link |
US8023885B2 (en) | 2004-05-13 | 2011-09-20 | Qualcomm Incorporated | Non-frequency translating repeater with downlink detection for uplink and downlink synchronization |
US8027642B2 (en) | 2004-04-06 | 2011-09-27 | Qualcomm Incorporated | Transmission canceller for wireless local area network |
US8059727B2 (en) | 2005-01-28 | 2011-11-15 | Qualcomm Incorporated | Physical layer repeater configuration for increasing MIMO performance |
US8060009B2 (en) | 2002-10-15 | 2011-11-15 | Qualcomm Incorporated | Wireless local area network repeater with automatic gain control for extending network coverage |
US8078100B2 (en) | 2002-10-15 | 2011-12-13 | Qualcomm Incorporated | Physical layer repeater with discrete time filter for all-digital detection and delay generation |
-
1994
- 1994-09-26 JP JP6267982A patent/JPH0897762A/en active Pending
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100491088B1 (en) * | 2002-08-19 | 2005-05-24 | 주식회사 케이티프리텔 | Mobile communication repeater system using frequency conversion method |
US8060009B2 (en) | 2002-10-15 | 2011-11-15 | Qualcomm Incorporated | Wireless local area network repeater with automatic gain control for extending network coverage |
US8078100B2 (en) | 2002-10-15 | 2011-12-13 | Qualcomm Incorporated | Physical layer repeater with discrete time filter for all-digital detection and delay generation |
JP2006510326A (en) * | 2002-12-16 | 2006-03-23 | ワイデファイ インコーポレイテッド | Improved wireless network repeater |
US8027642B2 (en) | 2004-04-06 | 2011-09-27 | Qualcomm Incorporated | Transmission canceller for wireless local area network |
US8023885B2 (en) | 2004-05-13 | 2011-09-20 | Qualcomm Incorporated | Non-frequency translating repeater with downlink detection for uplink and downlink synchronization |
WO2006080693A1 (en) * | 2004-10-06 | 2006-08-03 | Ktfreetel Co., Ltd. | Method for mobile communication service using dedicated frequency and apparatus thereof |
US8059727B2 (en) | 2005-01-28 | 2011-11-15 | Qualcomm Incorporated | Physical layer repeater configuration for increasing MIMO performance |
JP2009530972A (en) * | 2006-03-20 | 2009-08-27 | アルカテル−ルーセント ユーエスエー インコーポレーテッド | Completing an emergency call over the network with a malfunctioning backhaul communication link |
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