JP3161877B2 - Centralized control radio base station equipment - Google Patents
Centralized control radio base station equipmentInfo
- Publication number
- JP3161877B2 JP3161877B2 JP17196293A JP17196293A JP3161877B2 JP 3161877 B2 JP3161877 B2 JP 3161877B2 JP 17196293 A JP17196293 A JP 17196293A JP 17196293 A JP17196293 A JP 17196293A JP 3161877 B2 JP3161877 B2 JP 3161877B2
- Authority
- JP
- Japan
- Prior art keywords
- base station
- radio base
- transmission
- distribution switch
- signal
- 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.)
- Expired - Lifetime
Links
Landscapes
- Time-Division Multiplex Systems (AREA)
- Mobile Radio Communication Systems (AREA)
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、無線装置を集中配置し
た集中基地局と複数の無線基地局との間で無線変調信号
を切り替えて伝送することにより、無線基地局を介し
て、移動機端末と集中基地局間の通信回線の設定を行な
う移動通信方式に関し、BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile station via a radio base station by switching and transmitting a radio modulation signal between a centralized base station in which radio devices are centrally arranged and a plurality of radio base stations. Regarding a mobile communication system for setting up a communication line between a terminal and a centralized base station,
【０００２】変復調信号を時分割して複数の移動機端末
と双方向通信を行うＴＤＭＡ−ＴＤＤ（Ｔｉｍｅ Ｄｉ
ｖｉｓｉｏｎ Ｍｕｌｔｉｐｌｅ Ａｃｃｅｓｓ−Ｔｉ
ｍｅＤｉｖｉｓiｏｎ Ｄｕｐｌｅｘ：時分割多元接続
−時分割双方向伝送）通信方式を使用し、変調出力信号
をＴＤＭＡのタイムスロット毎に送受分配スイッチによ
り切り替えて、無線基地局に無線変調信号を伝送して、
無線ゾーン内の移動機端末と接続する集中制御方式の集
中基地局の設備に係る。[0002] A TDMA-TDD (Time Did) for performing two-way communication with a plurality of mobile terminals by time-sharing a modulation / demodulation signal.
vision Multiple Access-Ti
(meDivision Duplex: time-division multiple access-time-division bidirectional transmission) using a communication method, switching a modulation output signal by a transmission / reception distribution switch for each TDMA time slot, and transmitting a radio modulation signal to a radio base station.
The present invention relates to a facility of a centralized base station of a centralized control system connected to a mobile terminal in a wireless zone.
【０００３】[0003]
【従来の技術】集中基地局に変復調器を集中配置し、変
復調信号をＴＤＭＡのタイムスロット毎に、複数の無線
基地局に切り替えて無線回線を柔軟に提供するように構
成した移動通信システムがある。2. Description of the Related Art There is a mobile communication system in which a modulator and a demodulator are centrally arranged in a centralized base station, and a modulation / demodulation signal is switched to a plurality of wireless base stations for each TDMA time slot to flexibly provide a wireless line. .
【０００４】このような移動通信システムにおける集中
基地局の変調器は、変調出力信号を時間軸上で一定間隔
のタイムスロットに分割し、ＴＤＭＡバーストとして送
出する。変調バースト出力は、送信分配スイッチに入力
され変調バーストと同期した一定間隔のタイムスロット
で選択された無線基地局に切り替えて出力され無線基地
局に伝送される。[0004] The modulator of the centralized base station in such a mobile communication system divides the modulated output signal into time slots at regular intervals on the time axis, and transmits the divided time slots as TDMA bursts. The modulation burst output is input to the transmission distribution switch, is switched to the selected radio base station in a fixed time slot synchronized with the modulation burst, is output, and is transmitted to the radio base station.
【０００５】図２は、従来の移動通信システムの構成の
例を示す図である。交換機１３と集中基地局１は、電話
回線１５により接続されており、下り回線においては、
電話信号は回線終端器１４を通して集中基地局の変調器
５に入力されて変調される。FIG. 2 is a diagram showing an example of the configuration of a conventional mobile communication system. The exchange 13 and the centralized base station 1 are connected by a telephone line 15, and in a down line,
The telephone signal is input to the modulator 5 of the centralized base station through the line terminator 14 and modulated.
【０００６】変調出力信号は、送信分配スイッチ１０に
より切り替えて出力され、伝送路１２を通して無線基地
局２に伝送され、無線基地局の電力増幅器１８で増幅さ
れてアンテナ１９から無線回線２０を通して移動機端末
２１に送信される。制御回路９はＴＤＭＡタイムスロッ
ト毎に送信分配スイッチの切り替え制御を行なうもので
あって、送信分配スイッチの駆動信号を発生する。[0006] The modulated output signal is switched and output by a transmission distribution switch 10, transmitted to the radio base station 2 through a transmission line 12, amplified by a power amplifier 18 of the radio base station, and transmitted from an antenna 19 through a radio line 20 to a mobile station. Sent to terminal 21. The control circuit 9 controls the switching of the transmission distribution switch for each TDMA time slot, and generates a drive signal for the transmission distribution switch.
【０００７】上り回線においては、移動機端末の送信信
号は、無線基地局２で受信され、伝送路１２を通して集
中基地局の受信分配スイッチ１１に入力され、複数の復
調器６に切り替えて入力される。制御回路９は、受信分
配スイッチを受信分配スイッチ切り替えタイミングで制
御する。復調器６の復調信号は、回線終端器１４により
電話信号に変換され交換機１３に伝送される。In the uplink, the transmission signal of the mobile terminal is received by the radio base station 2, input to the reception distribution switch 11 of the centralized base station through the transmission line 12, and is input to the plurality of demodulators 6 by switching. You. The control circuit 9 controls the reception distribution switch at the reception distribution switch switching timing. The demodulated signal from the demodulator 6 is converted into a telephone signal by the line terminator 14 and transmitted to the exchange 13.
【０００８】無線基地局２と、複数の移動機端末２１
で、双方向通信を行なう場合は、変調出力信号を時間軸
上で複数のタイムスロットに分割し、変調バースト信号
を複数の移動機端末に割り当て交互に送受信を行なうＴ
ＤＭＡ−ＴＤＤ方式を用いる。The radio base station 2 and a plurality of mobile terminal 21
When bidirectional communication is performed, a modulated output signal is divided into a plurality of time slots on a time axis, and a modulated burst signal is allocated to a plurality of mobile terminals to perform transmission and reception alternately.
The DMA-TDD method is used.
【０００９】図３に送信ｎスロットと、受信ｎスロット
の、ＴＤＭＡ−ＴＤＤのフレーム構成を示す。各タイム
スロットの間は、ガードタイムと呼ばれる空きビットを
挿入し、送受バーストが伝送遅延時間により時間軸上で
重ならないようにしている。FIG. 3 shows a TDMA-TDD frame configuration with n transmission slots and n reception slots. An empty bit called a guard time is inserted between each time slot so that transmission and reception bursts do not overlap on the time axis due to a transmission delay time.
【００１０】[0010]
【発明が解決しようとする課題】上述したような従来の
移動通信システムにおいて、集中基地局と無線基地局間
の伝送距離が長い場合、上り受信バースト信号は、集中
基地局で伝搬遅延時間だけ遅れて受信されることになる
から、制御回路により受信分配スイッチの切り替えタイ
ミングを遅延させて切り替える。In the conventional mobile communication system as described above, when the transmission distance between the centralized base station and the radio base station is long, the uplink received burst signal is delayed by the propagation delay time at the centralized base station. Therefore, the switching timing of the reception distribution switch is delayed by the control circuit.
【００１１】図４は送受信バースト信号を説明する図で
ある。同図において、Ｔ１、及び、Ｔ２は、ＴＤＭＡの
スロット番号１番、及び、２番の送信バーストタイミン
グであり、Ｒ１、及び、Ｒ２は、ＴＤＭＡのスロット番
号１番、及び、２番の受信バーストタイミングを示して
いる。FIG. 4 is a diagram for explaining a transmission / reception burst signal. In the figure, T1 and T2 are the TDMA slot number 1 and the second transmission burst timing, and R1 and R2 are the TDMA slot number 1 and the second reception burst timing. The timing is shown.
【００１２】同図に示すように、変調器５よりＴ１のタ
イミングで無線基地局２へ送信した場合、無線基地局２
の移動機からの受信信号は、Ｒ１のタイミングより遅延
時間１６だけ遅れて復調器６に受信される。As shown in FIG. 1, when a signal is transmitted from the modulator 5 to the radio base station 2 at the timing of T1, the radio base station 2
Is received by the demodulator 6 with a delay of 16 from the timing of R1.
【００１３】また、変調器５よりＴ２のタイミングで、
無線基地局２′へ送信した場合、無線基地局２′の移動
機からの受信信号は、Ｒ２のタイミングより遅延時間１
７だけ遅れて復調器６に受信される。このように、集中
基地局と無線基地局の間の伝送距離が各伝送路で異な
り、その遅延時間差がガードタイムで吸収できない場合
は、変調信号を時間軸上で隣り合ったタイムスロットを
無線基地局に切り替えて接続すると移動器端末の受信バ
ースト信号が、受信分配スイッチの入力側で衝突するた
め、受信信号の分配切り替え、及び、復調ができないと
言う不都合があった。At the timing of T2 from the modulator 5,
When transmitted to the radio base station 2 ′, the received signal from the mobile station of the radio base station 2 ′ has a delay time of 1 from the timing of R 2.
The signal is received by the demodulator 6 with a delay of 7. As described above, when the transmission distance between the centralized base station and the radio base station is different in each transmission path and the delay time difference cannot be absorbed by the guard time, the modulated signal is transmitted to the radio base station by using the time slots adjacent to each other on the time axis. If the connection is switched to the station, the reception burst signal of the mobile terminal collides on the input side of the reception distribution switch, so that the distribution switching and demodulation of the reception signal cannot be performed.
【００１４】本発明は集中制御無線基地局と各無線基地
局との伝送遅延時間の差が大きい場合であっても、ガー
ドタイムを大とすることなく、受信バースト信号の衝突
を回避することのできる集中制御無線基地局を実現する
ことを目的としている。The present invention is intended to avoid collision of received burst signals without increasing the guard time even when the difference in transmission delay time between the central control radio base station and each radio base station is large. It aims at realizing a centralized control radio base station that can.
【００１５】[0015]
【課題を解決するための手段】本発明によれば、上述の
課題は前記特許請求の範囲に記載した手段により解決さ
れる。According to the present invention, the above-mentioned object is solved by the means described in the claims.
【００１６】すなわち、本発明は、交換機を通して電話
回線網と接続され、かつ、変復調機能及び変調出力信号
の切り替え機能を集中配置した集中基地局と、電力増幅
器及びアンテナを備えた無線基地局との間を伝送路によ
り接続し、無線基地局と複数の移動機端末とを無線回線
により接続して、ＴＤＭＡ−ＴＤＤ方式によって通信を
行なう移動通信方式の集中基地局で用いる装置であっ
て、That is, the present invention provides a centralized base station which is connected to a telephone line network through an exchange and has a modulation / demodulation function and a switching function of a modulation output signal, and a radio base station having a power amplifier and an antenna. A device used in a centralized base station of a mobile communication system that connects between a wireless base station and a plurality of mobile terminals by a wireless line and performs communication according to a TDMA-TDD system,
【００１７】交換機側からの電話回線信号を終端する回
線終端器と、複数の下り（集中基地局から移動機方向）
電話回線信号をＴＤＭＡ通信方式により時分割で多重化
して変調する複数の変調器と、変調器出力信号をＴＤＭ
Ａバースト毎に各無線基地局に切り替えて出力する送信
分配スイッチと、無線基地局から伝送路を通して受信し
た信号をＴＤＭＡバースト毎に切り替えて出力する複数
の受信分配スイッチと、当該受信分配スイッチの出力信
号を復調する複数の復調器と、A line terminator for terminating a telephone line signal from the exchange, and a plurality of downlinks (from the centralized base station to the mobile station)
A plurality of modulators for time-division multiplexing and modulating a telephone line signal by a TDMA communication system, and a TDM
A transmission distribution switch for switching and outputting to each radio base station for each A burst, a plurality of reception distribution switches for switching and outputting a signal received from the radio base station through the transmission path for each TDMA burst, and an output of the reception distribution switch A plurality of demodulators for demodulating the signal,
【００１８】該複数の復調器の内のいずれかを選択する
切替器と、前記各受信分配スイッチの切り替えのタイミ
ングを調整する手段とを具備し、集中基地局と無線基地
局間の伝送路の伝送遅延時間に応じて群分けした無線基
地局からの受信用伝送路を、群ごとに異なる受信分配ス
イッチに収容すると共に、各受信分配スイッチの切り替
えのタイミングを、前記伝送遅延時間に対応する値に調
整し、該受信分配スイッチの出力を、それぞれ複数系列
の復調器に入力し、下り回線に対応する上りの信号が入
力される復調器を選択して電話回線に接続するように構
成した集中制御無線基地局装置である。[0018] comprising the <br/> switch for selecting one of the plurality of demodulators, and means for adjusting the timing of the switching of the receiving distribution switch, between centralized base station and a radio base station Wireless modules grouped according to the transmission delay time of the transmission path
The transmission path for receiving from the base station is set to
Switch and switch each reception distribution switch
Control timing to a value corresponding to the transmission delay time.
And integer, the output of the received distribution switch, respectively input to a plurality of sequences of demodulators, the uplink signal is input corresponding to the downlink
Configured to connect to a telephone line by selecting a demodulator which is force
This is a centralized control wireless base station device that has been completed.
【００１９】[0019]
【作用】本発明による集中制御無線基地局においては、
下り回線の変調出力バースト信号は、従来の場合と同様
に集中基地局の送信分配スイッチにより複数の無線基地
局へバースト毎に切り替えて割り当てられる。下り回線
では、集中基地局と無線基地局間の伝送距離による遅延
時間が無線基地局毎に異なっても、差し支えないが、上
り回線では、受信分配スイッチの切り替えタイミングを
各無線基地局からの受信バースト信号毎に補正する必要
がある。In the centralized control radio base station according to the present invention,
The modulated output burst signal of the downlink is switched and assigned to a plurality of radio base stations for each burst by the transmission distribution switch of the centralized base station as in the conventional case. In the downlink, the delay time due to the transmission distance between the centralized base station and the radio base station may be different for each radio base station, but in the uplink, the switching timing of the reception distribution switch is determined by the reception timing from each radio base station. It is necessary to correct for each burst signal.
【００２０】そのため、本発明では、複数の受信分配ス
イッチを具備し、受信分配スイッチを駆動する制御回路
の駆動信号の出力タイミングを受信分配スイッチ毎に調
整して、集中基地局と各無線基地局間の伝送距離に応じ
て収容する受信分配スイッチを異ならしめ、復調器入力
側で受信バースト信号が衝突しないように、受信分配ス
イッチにより切り替えて、各受信分配スイッチ出力側に
接続された復調器によって復調し、複数の復調信号出力
を切り替えて出力することにより、集中基地局と無線基
地局の間の伝送距離による遅延時間差がガードタイムを
超える場合においても受信分配切り替えおよび復調を行
うことを可能としている。Therefore, according to the present invention, a plurality of reception distribution switches are provided, and the output timing of a drive signal of a control circuit for driving the reception distribution switches is adjusted for each reception distribution switch, so that the centralized base station and each radio base station are adjusted. According to the transmission distance between the receiving and distribution switches accommodated differently, switching by the receiving distribution switch so that the received burst signal does not collide at the demodulator input side, by the demodulator connected to each receiving distribution switch output side By demodulating and switching and outputting a plurality of demodulated signal outputs, it is possible to perform reception distribution switching and demodulation even when the delay time difference due to the transmission distance between the centralized base station and the radio base station exceeds the guard time. I have.
【００２１】このように、本発明は、変復調器及び周波
数変換器を集中基地局に集中配置した移動通信の基地局
間通信において、集中基地局と無線基地局間の伝送距離
差によって生じる遅延時間の影響を避けるべく、集中基
地局に複数の受信分配スイッチ及び複数の復調器を配置
し復調信号を切り替えることによって、受信切り替えタ
イミングの調整範囲を拡大しているので、集中基地局と
無線基地局間の伝送距離差が大きな場合であっても受信
信号の衝突を防止することができる。As described above, the present invention provides a delay time caused by a difference in transmission distance between a centralized base station and a radio base station in communication between base stations in mobile communication in which a modem and a frequency converter are concentratedly arranged in the centralized base station. In order to avoid the influence of the above, the adjustment range of the reception switching timing is expanded by arranging a plurality of reception distribution switches and a plurality of demodulators in the centralized base station and switching the demodulated signals. Even when the transmission distance difference is large, collision of received signals can be prevented.
【００２２】[0022]
【実施例】図１は、本発明の一実施例を示す図である。
同図において、交換機１３と集中基地局１は、電話回線
１５により接続され、下り電話信号は回線終端器１４に
より集中基地局１の変調器５に入力され無線信号に変調
される。変調器５の変調出力信号は、送信分配スイッチ
１０に入力されて複数の無線基地局に切り替えて出力さ
れる。制御回路９は、ＴＤＭＡタイムスロット毎に送信
分配スイッチの切り替えを制御するものであり送信分配
スイッチの駆動信号を発生する。FIG. 1 is a diagram showing an embodiment of the present invention.
In FIG. 1, the exchange 13 and the centralized base station 1 are connected by a telephone line 15, and the downstream telephone signal is input to a modulator 5 of the centralized base station 1 by a line terminator 14 and modulated into a radio signal. The modulated output signal of the modulator 5 is input to the transmission distribution switch 10 and is switched to a plurality of wireless base stations and output. The control circuit 9 controls the switching of the transmission distribution switch for each TDMA time slot, and generates a drive signal for the transmission distribution switch.
【００２３】送信分配スイッチの出力は、無線基地局２
と伝送路１２で接続され無線変調信号が伝送され、無線
基地局２の電力増幅器１８で増幅されて、アンテナ１９
から無線回線２０を通して移動機端末２１に送信され
る。無線基地局２で受信した移動機端末２１からの上り
受信信号は、伝送路１２により集中基地局１に伝送され
る。The output of the transmission distribution switch is
The wireless modulation signal is transmitted through the transmission line 12 and is amplified by the power amplifier 18 of the wireless base station 2 to be transmitted to the antenna 19.
Is transmitted to the mobile terminal 21 through the wireless line 20. An uplink reception signal from the mobile terminal 21 received by the radio base station 2 is transmitted to the centralized base station 1 via the transmission path 12.
【００２４】そして、受信分配スイッチ１１に入力され
て、複数の復調器６に切り替えて出力され復調される。
無線基地局２′は、集中基地局１と伝送路１２より短い
伝送路１２′により集中基地局１と接続されているの
で、集中基地局１に伝送された上り受信信号は、受信分
配スイッチ１１と異なる受信分配スイッチ１１′に入力
され複数の復調器６′に切り替えて出力され復調され
る。The signal is input to the reception distribution switch 11 and switched to a plurality of demodulators 6 to be output and demodulated.
Since the radio base station 2 ′ is connected to the centralized base station 1 by a transmission path 12 ′ shorter than the centralized base station 1 and the transmission path 12, the uplink received signal transmitted to the centralized base station 1 is And is switched to a plurality of demodulators 6 'and output and demodulated.
【００２５】復調器６と復調器６´の復調出力信号は切
替器７に入力される。このとき、変調信号が送信分配ス
イッチ１０により接続された無線基地局からの受信信号
を、受信した受信分配スイッチにより切り替えられた信
号が入力された復調器の出力を選択して出力する。制御
回路９は、送信分配スイッチおよび受信分配スイッチを
制御するものであり、長い伝送路１２が接続されている
受信分配スイッチ１１は、遅延回路８により、長い伝送
路１２の伝送遅延時間に対応する時間だけ遅延させたタ
イミングで動作させる。The demodulated output signals of the demodulator 6 and the demodulator 6 'are input to the switch 7. At this time, a modulated signal is received from a radio base station connected by the transmission distribution switch 10, and a demodulator to which a signal switched by the received distribution switch is received is selected and output. The control circuit 9 controls the transmission distribution switch and the reception distribution switch, and has a long transmission line 12 connected thereto.
The reception distribution switch 11 uses the delay circuit 8 to transmit a long transmission.
The operation is performed at a timing delayed by a time corresponding to the transmission delay time of the path 12 .
【００２６】[0026]
【発明の効果】以上説明したように本発明によれば、伝
送遅延時間に応じた台数の復調器を、集中基地局に配置
することにより、送受タイミングの調整範囲を拡大して
いるので、集中基地局と無線基地局間の伝送距離が大き
く異なる条件のものが存在する場合であっても、受信バ
ースト信号の衝突の発生を回避することができる利点が
ある。As described above, according to the present invention, since the number of demodulators corresponding to the transmission delay time is arranged in the centralized base station, the range for adjusting the transmission / reception timing is expanded. Even when there is a condition where the transmission distance between the base station and the wireless base station is greatly different, there is an advantage that occurrence of collision of received burst signals can be avoided.
【図１】本発明の一実施例の構成を示す図である。FIG. 1 is a diagram showing a configuration of an embodiment of the present invention.
【図２】従来の移動通信システムの構成の例を示す図で
ある。FIG. 2 is a diagram illustrating an example of a configuration of a conventional mobile communication system.
【図３】ＴＤＭＡ−ＴＤＤのフレーム構成を示す図であ
る。FIG. 3 is a diagram illustrating a frame configuration of TDMA-TDD.
【図４】送信バースト信号について説明する図である。FIG. 4 is a diagram illustrating a transmission burst signal.
１ 集中基地局 ２，２′ 無線基地局 ５ 変調器 ６ 復調器 ７ 切替器 ８ 遅延回路 ９ 制御回路 １０ 送信分配スイッチ １１，１１′ 受信分配スイッチ １２，１２′ 伝送路 １３ 交換機 １４ 回線終端器 １５ 電話回線 １６，１７ 遅延時間 １８ 電力増幅器 １９ アンテナ ２０ 無線回線 ２１ 移動機端末 DESCRIPTION OF SYMBOLS 1 Centralized base station 2, 2 'Wireless base station 5 Modulator 6 Demodulator 7 Switcher 8 Delay circuit 9 Control circuit 10 Transmission distribution switch 11, 11' Reception distribution switch 12, 12 'Transmission line 13 Switch 14 Line terminator 15 Telephone line 16, 17 Delay time 18 Power amplifier 19 Antenna 20 Wireless line 21 Mobile terminal
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｈ０４Ｑ 7/30 (56)参考文献 特開 平６−335045（ＪＰ，Ａ) 特開 平６−268622（ＪＰ，Ａ) 特開 平５−327632（ＪＰ，Ａ) 特開 平５−30064（ＪＰ，Ａ) 特開 平４−207532（ＪＰ，Ａ) 特開 平６−189364（ＪＰ，Ａ) 電子情報通信学会技術研究報告，ＲＣ Ｓ92−79（1992−10−23），小笠原守 他，集中制御スペクトル分配切替え方式 の検討，ｐ．67−72 (58)調査した分野(Int.Cl.7，ＤＢ名) H04J 3/00 - 3/26 H04B 7/24 - 7/26 H04Q 7/00 - 7/38 Continuation of the front page (51) Int.Cl. 7 Identification symbol FI H04Q 7/30 (56) References JP-A-6-335045 (JP, A) JP-A-6-268622 (JP, A) JP-A-5 -327632 (JP, A) JP-A-5-30064 (JP, A) JP-A-4-207532 (JP, A) JP-A-6-189364 (JP, A) IEICE Technical Report, RC S92 −79 (1992−10−23), Mamoru Ogasawara et al., Study of centralized control spectrum distribution switching method, p. 67-72 (58) Field surveyed (Int.Cl. 7 , DB name) H04J 3/00-3/26 H04B 7 /24-7/26 H04Q 7 /00-7/38
Claims (1)
かつ、変復調機能及び変調出力信号の切り替え機能を集
中配置した集中基地局と、電力増幅器及びアンテナを備
えた無線基地局との間を伝送路により接続し、無線基地
局と複数の移動機端末とを無線回線により接続して、Ｔ
ＤＭＡ−ＴＤＤ方式によって通信を行なう移動通信方式
の集中基地局で用いる装置であって、 交換機側からの電話回線信号を終端する回線終端器と、 複数の下り（集中基地局から移動機方向）電話回線信号
をＴＤＭＡ通信方式により時分割で多重化して変調する
複数の変調器と、 変調器の出力信号をＴＤＭＡバースト毎に各無線基地局
に切り替えて出力する送信分配スイッチと、 無線基地局から伝送路を通して受信した信号をＴＤＭＡ
バースト毎に切り替えて出力する複数の受信分配スイッ
チと、 当該受信分配スイッチの出力信号を復調する複数の復調
器と、 該複数の復調器の内のいずれかを選択する切替器と、前記 各受信分配スイッチの切り替えのタイミングを調整
する手段とを具備し、 集中基地局と無線基地局間の伝送路の伝送遅延時間に応
じて群分けした無線基地局からの受信用伝送路を、群ご
とに異なる受信分配スイッチに収容すると共に、各受信分配スイッチの切り替えのタイミングを、前記伝
送遅延時間に対応する値に調整し、 該受信分配スイッチの出力を、それぞれ複数系列の復調
器に入力し、下り回線に対応する上りの信号が入力され
る復調器を選択して電話回線に接続するように構成した
ことを特徴とする集中制御無線基地局装置。1. A telephone line network connected through an exchange,
In addition, a centralized base station in which a modulation / demodulation function and a switching function of a modulation output signal are centrally arranged, and a radio base station including a power amplifier and an antenna are connected by a transmission line, and the radio base station and a plurality of mobile terminals are connected to each other. Are connected by a wireless line, and T
An apparatus used in a centralized base station of a mobile communication system that performs communication according to a DMA-TDD system, comprising: a line terminator for terminating a telephone line signal from an exchange side; A plurality of modulators for multiplexing and modulating line signals in a time division manner by a TDMA communication system, a transmission distribution switch for switching and outputting an output signal of the modulator to each radio base station for each TDMA burst, and a transmission from the radio base station The signal received through the TDMA
A plurality of receiving distribution switch that switches and outputs each burst, a plurality of demodulators for demodulating the output signal of the received distribution switch, a switch for selecting one of the plurality of demodulators, each receiving Means for adjusting the timing of switching of the distribution switch, wherein the transmission paths for reception from the radio base stations are grouped according to the transmission delay time of the transmission path between the centralized base station and the radio base station .
And the switching timing of each reception distribution switch is transmitted to the reception distribution switch.
The output is adjusted to a value corresponding to the transmission delay time, the outputs of the reception distribution switches are respectively input to a plurality of demodulators, and an uplink signal corresponding to a downlink is input.
A centralized control radio base station apparatus configured to select a demodulator to be connected to a telephone line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17196293A JP3161877B2 (en) | 1993-07-13 | 1993-07-13 | Centralized control radio base station equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17196293A JP3161877B2 (en) | 1993-07-13 | 1993-07-13 | Centralized control radio base station equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0730509A JPH0730509A (en) | 1995-01-31 |
| JP3161877B2 true JP3161877B2 (en) | 2001-04-25 |
Family
ID=15932995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17196293A Expired - Lifetime JP3161877B2 (en) | 1993-07-13 | 1993-07-13 | Centralized control radio base station equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3161877B2 (en) |
-
1993
- 1993-07-13 JP JP17196293A patent/JP3161877B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| 電子情報通信学会技術研究報告，ＲＣＳ９２−７９（１９９２−１０−２３），小笠原守他，集中制御スペクトル分配切替え方式の検討，ｐ．６７−７２ |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0730509A (en) | 1995-01-31 |
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