JPH0629914A - Synchronization system for mobile object communication network - Google Patents

Synchronization system for mobile object communication network

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JPH0629914A
JPH0629914A JP17843892A JP17843892A JPH0629914A JP H0629914 A JPH0629914 A JP H0629914A JP 17843892 A JP17843892 A JP 17843892A JP 17843892 A JP17843892 A JP 17843892A JP H0629914 A JPH0629914 A JP H0629914A
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signal
phase
difference
means
clock
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JP2989378B2 (en )
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Takafumi Shimizu
隆文 清水
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Fujitsu Ltd
富士通株式会社
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Abstract

PURPOSE:To prevent hindrance in the synchronization adjustment of a subordinate radio base station even when a fault takes place in the clock signal of the radio base station on the half-way of a synchronous signal distribution system. CONSTITUTION:The 1st phase difference detecting means 4b of a subordinate radio base station 4 always detects a phase difference between a synchronous signal from a host radio base station 3 and a clock signal generated from a clock signal generating means 4a. When the detected phase difference is larger than a prescribed phase difference, a 2nd phase difference detecting means 4c detects a phase difference between the synchronous signal from an adjacent radio base station 7 and a clock signal from the clock signal generating means 4a. A synchronization control means 4d detects the abnormality of the host radio base station 3 based on the phase difference detected by the 1st phase difference detection means 4b and the 2nd phase difference detection means 4c, and when it is detected, the clock signal generating means 4a generates a clock signal in phase synchronously with the synchronous signal of the adjacent radio base station 7.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は移動体通信網の同期方式に関し、特に移動体通信網を構成する複数の無線基地局間で位相同期が確立されている移動体通信網の同期方式に関する。 The present invention relates to an synchronization method of a mobile communication network, a synchronous method of the mobile communication network has been established phase synchronization especially between a plurality of radio base stations constituting the mobile communication network.

【0002】自動車電話、携帯電話等のためのセルラー無線システムでは、小ゾーンをカバーする複数の無線基地局を設置して運用し、それらのトータルとして所定のサービスエリアを確保することが行われているが、各々の基地局で送受信する信号は、回線品質確保のために、 [0002] car phone, a cellular radio system for a mobile phone or the like, operated by installing a plurality of radio base stations that cover small zone, it is practiced to secure a predetermined service area as their total It is, but signals transmitted and received by each of the base stations, for the line quality assurance,
位相同期が確立されている必要がある。 It is necessary to phase synchronization is established. そのため、基地局間で位相同期制御が実施されている。 Therefore, phase synchronization control is carried out between the base stations.

【0003】 [0003]

【従来の技術】図6は、従来の移動体通信網を示すブロック図である。 BACKGROUND ART FIG. 6 is a block diagram showing a conventional mobile communication network. すなわち、小ゾーン61〜63の中心に無線基地局B1〜Bnがそれぞれ設置され、各無線基地局B1〜Bnは、移動体通信用の交換局64からの信号を自己の小ゾーン61〜63内に居る移動端末装置C1 That is, the radio base station B1~Bn the center of the small zones 61 to 63 are installed respectively, each of the radio base station B1~Bn, the mobile small zone 61-63 a signal from the exchange 64 of the own communication the mobile terminal device C1 that have to
1〜C1p、C21〜C2q、Cn1〜Cnzにそれぞれ無線送信する。 1~C1p, C21~C2q, respectively wirelessly transmits the Cn1~Cnz. また、逆方向へ無線送信が行われる。 The radio transmission is performed in the reverse direction.
交換局64は固定端末用の交換局(図示せず)を経て一般電話に接続される。 Switching center 64 is connected via a switching center of the fixed terminals (not shown) to the general telephone.

【0004】交換局64から各無線基地局B1〜Bnへは同期信号が伝送路を介して送信されるが、交換局64 [0004] from the exchange 64 to each radio base station B1~Bn but synchronization signal is transmitted via the transmission path, the mobile switching center 64
と各無線基地局B1〜Bnとを結ぶ各伝送路の長さの違いにより同期信号の到達時間に差がある。 And there is a difference in arrival time of the synchronization signal by the difference between the lengths of the transmission lines connecting the respective radio base station Bl to Bn. そのため、各無線基地局B1〜Bnは、それらの差に相当する予め設定された遅延補正値で上記各同期信号を補正して各位相を揃えた上で、それら補正済の同期信号に位相同期したクロック信号をそれぞれ発生するようにしている。 Therefore, each radio base station B1~Bn is the respective synchronization signal after having aligned the correction to the phase with preset delay correction value corresponding to their difference, the phase locked to their corrected sync signal are clock signals to be generated, respectively.

【0005】しかし、伝送路途中の工事等により迂回路が設定されたりすると、上記補正は必ずしも適正なものではなくなるため、上記補正は大まかに行うためのものと位置づけ、次に説明するように、さらに精密な位相同期をとるようにしている。 However, the bypass path by construction, etc. of the transmission line midway or is set, since the correction is not necessarily appropriate, the correction is regarded as one for performing rough, as described below, It is to take a more precise phase synchronization.

【0006】図7(A)は、無線基地局間の同期網を示す図である。 [0006] FIG. 7 (A) is a diagram showing a synchronous network between the wireless base station. 図6に示した無線基地局B1〜Bnのうちの1つを基準基地局Mとし、残りを従属基地局Sとする。 One of the radio base station B1~Bn shown as a reference base station M in FIG. 6, the remainder with slave base station S. 基準基地局Mから各従属基地局Sに対して基準同期信号が配信され、各従属基地局Sでは、基準同期信号に位相同期したクロック信号をそれぞれ発生するようにして、無線基地局間の正確な同期網を構築する。 It delivered the reference synchronizing signal to each slave base station S from the reference base station M, the respective slave base stations S, and the reference synchronizing signal phase-synchronized with the clock signal so as to generate respective, accurately between radio base stations to build such a synchronous network. なお、各無線基地局の送信出力が小さいため、基準基地局Mから基準同期信号が配信される複数の同期信号配信系統を構成し、順に上位局の同期信号を受信して、それに位相同期した自局のクロック信号を発生するようにする。 Since the transmission power of each radio base station is small, constitutes a plurality of synchronous signal distribution system that the reference synchronizing signal from the reference base station M is delivered, in order to receive the synchronization signal of the upper station, it is phase-synchronized so as to generate a clock signal of its own station. 例えば、基準基地局Mから従属基地局S1,S2,S3・・ For example, the slave base station S1 to the reference base station M, S2, S3 · ·
・の第1系統、また、基準基地局Mから従属基地局S2 First system-also dependent from the reference base station M base station S2
1,S22,S23,S24・・・の第2系統が構成される。 1, S22, S23, S24 second line of ... is formed. これにより、無線基地局B1〜Bn間の位相同期が微調整されることになる。 Thereby, the phase synchronization between the radio base station B1~Bn is finely adjusted.

【0007】 [0007]

【発明が解決しようとする課題】しかし、従来の無線基地局間の同期網においては、図7(B)に示すように、 [SUMMARY OF THE INVENTION However, in the synchronous network between conventional wireless base station, as shown in FIG. 7 (B),
例えば、従属基地局S1のクロック信号に異常が発生した場合、その下位の従属基地局が従属基地局S1のクロック信号の異常を判断できないから、異常なクロック信号に追随して従属基地局S2,S3が誤った同期調整を行なってしまい、各無線基地局がいもづる式に誤った同期調整を行なってしまうという問題点があった。 For example, when an abnormality occurs in the clock signal of the slave base station S1, since its subordinate slave base station can not determine the abnormality of the clock signal of the slave base station S1, following the abnormal clock signal slave base station S2, S3 is cause by performing erroneous synchronization adjustment, each radio base station there is a problem that performing wrong synchronization adjustment in one after another.

【0008】本発明はこのような点に鑑みてなされたものであり、同期信号配信系統の途中の無線基地局のクロック信号に異常が生じても、その下位の無線基地局の同期調整に支障がでないようにした移動体通信網の同期方式を提供することを目的とする。 [0008] The present invention has been made in view of these points, even when an abnormality occurs in the middle of the clock signal of the radio base station of the synchronous signal distribution system, trouble in the synchronization adjustment of the subordinate wireless base station and to provide a synchronization method of a mobile communication network which is adapted is not out.

【0009】 [0009]

【課題を解決するための手段】本発明では上記目的を達成するために、図1に示すように、移動体通信用の交換局1と、交換局1から遅延時間を伴って同期信号が配信される複数の無線基地局2〜8とからなる移動体通信網において、複数の無線基地局2〜8の各クロック信号発生手段と、複数の同期信号配信系統と、第1位相差検出手段4bと、第2位相差検出手段4cと、同期制御手段4dとを有する移動体通信網の同期方式が提供される。 To achieve the above object, the present invention SUMMARY OF], as shown in FIG. 1, an exchange 1 for mobile communications, the synchronization signal with a delay time from the exchange 1 Delivery a plurality of the mobile communication network of the wireless base station 2-8 Prefecture, and each of the clock signal generating means of the plurality of radio base stations 2-8, and a plurality of synchronizing signals delivered system, the first phase difference detection unit 4b that are When a second phase difference detection unit 4c, the synchronization method of the mobile communication network and a synchronous control unit 4d is provided.

【0010】複数の無線基地局2〜8の各クロック信号発生手段は、交換局1から配信される同期信号に対し伝送路での遅延時間分の位相補正をし、補正された同期信号に従い、クロック信号をそれぞれ発生する。 [0010] Each clock signal generating means of the plurality of radio base station 2-8, to the synchronization signal delivered from the exchange 1 to the delay time of the phase correction in the transmission path, in accordance with the corrected sync signal, each to generate a clock signal. 複数の同期信号配信系統は、複数の無線基地局2〜8のうちの基準同期信号基地局2が自己のクロック信号発生手段からのクロック信号に基づき同期信号を自己を除く複数の無線基地局3〜8に配信するために用いられる。 A plurality of synchronous signal distribution system includes a plurality of radio base stations 3 reference synchronizing signal base station 2 except for self-synchronization signals based on the clock signal from its own clock signal generator of the plurality of radio base stations 2-8 8 used for delivery to. 第1位相差検出手段4bは、複数の同期信号配信系統のうちの第1の同期信号配信系統2,3,4,5の下位無線基地局4に設けられ、上位無線基地局3から送られた同期信号と、下位無線基地局4のクロック信号発生手段4aで発生したクロック信号との位相差を検出する。 The first phase difference detection unit 4b is provided on the first sub base station 4 of the synchronizing signal distribution system 2, 3, 4, 5 of a plurality of synchronizing signals delivered system is sent from the higher radio base station 3 a synchronizing signal, for detecting a phase difference between the clock signal generated by the clock signal generating means 4a of the lower base station 4. 第2位相差検出手段4cは、下位無線基地局4に設けられ、第1位相差検出手段4bが検出した位相差が所定値より大きいとき、下位無線基地局4に隣接する第2の同期信号配信系統2,6,7,8の隣接無線基地局7から送られた同期信号と、下位無線基地局4のクロック信号発生手段4 The second phase difference detection unit 4c is provided in the lower radio base station 4, when the phase difference the first phase difference detection unit 4b detects it is greater than a predetermined value, the second synchronizing signal which is adjacent to the lower base station 4 a synchronization signal transmitted from the adjacent wireless base station 7 of a distribution system 2,6,7,8, lower base station 4 clock signal generating means 4
aで発生したクロック信号との位相差を検出する。 Detecting the phase difference between the clock signal generated by a. 同期制御手段4dは、第1位相差検出手段4bが検出した位相差および第2位相差検出手段4cが検出した位相差を多数決論理処理により評価し、その結果に基づき下位無線基地局4のクロック信号発生手段4aの同期制御を行う。 Synchronization control means 4d is a phase difference retardation first phase difference detection unit 4b detects and the second phase difference detecting means 4c detects evaluated by majority logic processing, the clock of the lower base station 4 based on the result performs synchronization control signal generating means 4a.

【0011】 [0011]

【作用】以上の構成により、図1において、各無線基地局2〜8は、通常、自己のクロック信号発生手段からのクロック信号に基づき無線基地局としての送受信を行う。 [Action] With the above arrangement, in FIG. 1, each radio base station 2-8, usually performs transmission and reception of a radio base station based on a clock signal from its own clock signal generator. 同時に、下位無線基地局4の第1位相差検出手段4 At the same time, the first phase difference detection unit 4 of the lower base station 4
bが、常時、上位無線基地局3から送られた同期信号と、下位無線基地局4のクロック信号発生手段4aで発生したクロック信号との位相差を検出する。 b is always detects the phase difference between the synchronizing signal sent from the upper radio base station 3, a clock signal generated by the clock signal generating means 4a of the lower base station 4. そして、検出した位相差が所定値より大きいときには、第2位相差検出手段4cが、下位無線基地局4に隣接する第2の同期信号配信系統2,6,7,8の隣接無線基地局7から送られた同期信号と、下位無線基地局4のクロック信号発生手段4aで発生したクロック信号との位相差を検出する。 Then, when the phase difference detected is greater than a predetermined value, the second phase difference detecting means 4c is adjacent radio base stations 7 of the second synchronizing signal distribution system 2,6,7,8 adjacent to the lower base station 4 a sync signal sent from, for detecting a phase difference between the clock signal generated by the clock signal generating means 4a of the lower base station 4. この間、下位無線基地局4は、クロック信号発生手段4aで自発的に発生したクロック信号に基づき無線基地局としての送受信を行い続ける。 During this time, the lower the radio base station 4 continues to transmit and receive the radio base station based on the clock signal spontaneously generated by the clock signal generating means 4a.

【0012】同期制御手段4dが、第1位相差検出手段4bが検出した位相差および第2位相差検出手段4cが検出した位相差を多数決論理処理により評価し、位相差が大きい原因が、下位無線基地局4のクロック信号異常によるものか、または下位無線基地局4より上位の無線基地局のクロック信号異常によるものかを特定する。 [0012] synchronization control means 4d is, a phase difference retardation first phase difference detection unit 4b detects and the second phase difference detecting means 4c detects evaluated by majority logic processing, causes the phase difference is large, the lower or not the wireless base station 4 by the clock signal abnormalities, or to identify whether the lower radio base station 4 by the clock signal of the upper level of the radio base station abnormalities than. 下位無線基地局4の異常によるものならば、下位無線基地局4のクロック信号発生手段4aが上位無線基地局3の同期信号に追随するように制御し、また、下位無線基地局4より上位の無線基地局の異常によるものならば、隣接無線基地局7の同期信号に追随するように制御する。 If due to abnormality in the lower radio base station 4, and controls so that the clock signal generating means 4a of the lower base station 4 follows the synchronization signal of the upper base stations 3, also higher than the lower base station 4 if due to abnormality of the radio base station is controlled so as to follow the synchronization signals of the adjacent radio base stations 7.

【0013】 [0013]

【実施例】以下、本発明の一実施例を図面に基づいて説明する。 BRIEF DESCRIPTION based on an embodiment of the present invention with reference to the accompanying drawings. 図2は無線基地局間の同期網を示す図であり、 Figure 2 is a diagram showing a synchronous network between the wireless base stations,
この図を参照して本実施例の作動原理を説明する。 Referring to FIG explaining the operation principle of the present embodiment.

【0014】まず、図2(A)に示すように、同期網を構成する複数の無線基地局のうちの1つを基準基地局M [0014] First, as shown in FIG. 2 (A), reference base station M to one of a plurality of radio base stations constituting the synchronous network
とし、残りを従属基地局Sとする。 And then, the rest with slave base station S. 基準基地局Mから基準同期信号が配信される複数の同期信号配信系統を構成し、すなわち、基準基地局Mから従属基地局S1,S Configure multiple synchronization signal distribution system that the reference synchronizing signal from the reference base station M is delivered, i.e., the slave base station S1 to the reference base station M, S
2,S3・・・の第1系統、また、基準基地局Mから従属基地局S21,S22,S23,S24・・・の第2 2, S3 first system ... In addition, the reference base station M from the slave base station S21, S22, S23, S24 second ...
系統を構成し、順に上位局の同期信号を受信して、通常、その受信同期信号に位相同期した自局のクロック信号を発生するようにする。 Configure system sequentially receives the synchronization signals of the upper station, typically, so as to generate a clock signal of its own station synchronized in phase with the received synchronization signal. 例えば従属基地局S2が上位局S1の同期信号に位相同期した自局のクロック信号を発生している。 For example the slave base station S2 is generating a clock signal phase-synchronized with the mobile station to the synchronization signal of the upper station S1. このクロック信号の発生に際し、従属基地局S2は、上位局S1の同期信号と自己のクロック信号との位相差を常時、監視するようにする。 Upon generation of the clock signal, the slave base station S2 is a phase difference between the synchronizing signal and the own clock signal of the upper station S1 at all times, so as to monitor.

【0015】ところで、図2(B)に示すように、上位局S1のクロック信号に異常が発生した場合、従属基地局S2で検出される上記位相差が大きくなる。 By the way, as shown in FIG. 2 (B), when abnormality occurs in the clock signal of the higher-level station S1, the phase difference increases detected by slave base station S2. この大きな位相差を検出した従属基地局S2は、クロック信号を自走させるとともに、隣接の第2同期信号配信系統の隣接局S22の同期信号を受信する。 The large phase difference slave base station S2, which detects, as well to self clock signal, receives a synchronizing signal of an adjacent station S22 in the second synchronizing signal delivery system adjacent. そして、隣接局S2 Then, the adjacent station S2
2の同期信号と自己のクロック信号との位相差を検出し、上記の上位局S1のクロック信号異常の場合には当然、隣接局S22の同期信号と自己のクロック信号との位相差は大きくないから、この小さな位相差を確認した上で、従属基地局S2は、隣接局S22の同期信号に追随してクロック信号を発生するようにする。 Detecting a phase difference between two synchronizing signals and its own clock signals, when the clock signal of the upper station S1 abnormal course, not large phase difference between the synchronizing signal and the own clock signal of an adjacent station S22 from, after confirming the small phase difference, slave base station S2 is following the synchronization signals of the adjacent stations S22 so as to generate a clock signal.

【0016】以上のようにして、同期信号配信系統の途中の無線基地局S1のクロック信号に異常が生じても、 [0016] As described above, even if abnormality occurs in the middle of the clock signal of the radio base station S1 of the sync signal distribution system,
その下位の無線基地局S2,S3の同期調整に支障がでないようにすることが可能となる。 It is possible to ensure uninterrupted synchronization adjustment of its subordinate radio base stations S2, S3.

【0017】なお、もし、隣接局S22の同期信号と自己のクロック信号との位相差も大きいときには、自己のクロック信号が異常と判断して、従属基地局S2は、初めて、上位局S1の同期信号に追随してクロック信号を発生するようにする。 [0017] Incidentally, if the time is also the phase difference between the synchronizing signal and the own clock signal of an adjacent station S22 large, self-clock signal is determined to be abnormal, the slave base station S2 is the first time, the synchronization of the host station S1 following the signal so as to generate a clock signal. すなわち、従属基地局S2は、上位局S1の同期信号との間に位相差が生じても、直ぐに上位局S1の同期信号に追随するのではなく、隣接局S That is, the slave base station S2 is also a phase difference is generated between the synchronizing signal of the upper station S1, rather than immediately to follow the synchronization signal of the upper station S1, the adjacent station S
22の同期信号との位相差も確認の上で、上位局S1の同期信号に追随する。 Also the phase difference between the 22 of the sync signal on the confirmation, following the synchronizing signal of the upper station S1.

【0018】図3は、図2に示した同期網の無線基地局間で行われる同期信号の送受信の様子を示す図である。 FIG. 3 is a diagram showing a state of transmission and reception of the synchronizing signal is performed between the synchronous network of the wireless base station shown in FIG.
図3(A)は図2(A)に対応し、図3(B)は図2 3 (A) is corresponding to FIG. 2 (A), the FIG. 3 (B) 2
(B)に対応する。 Corresponding to (B). すなわち、各無線基地局S1,S That is, each radio base station S1, S
2,S21,S22,S23は、移動端末装置C(図6 2, S21, S22, S23, the mobile terminal C (Fig. 6
参照)との間で主信号の送受信を行う送受信装置の他に、上位局および隣接局から送信された主信号に含まれる同期信号を受信する受信部Rをそれぞれ備える。 Comprising in addition to the transceiver for transmitting and receiving main signals with the reference), the receiver R for receiving a synchronizing signal contained in the main signal transmitted from the upper station and the adjacent stations, respectively. そして、例えば、従属基地局S2の受信部R2が、上位局S Then, for example, receiver R2 of the slave base station S2 is the upper station S
1の同期信号を受信しているが〔図3(A)〕、大きい位相差が検出されると、従属基地局S2の受信部R2 While receiving a primary synchronization signal [FIG 3 (A)], the larger the phase difference is detected, the receiver R2 of the slave base station S2
は、隣接局S22の同期信号を受信するようにする〔図3(B)〕。 It is adapted to receive a synchronization signal of an adjacent station S22 [FIG 3 (B)].

【0019】図4は、無線基地局の内部構成を示すブロック図である。 [0019] FIG. 4 is a block diagram showing the internal configuration of the wireless base station. すなわち、移動端末装置(図示せず)との間で主信号の送受信を行う主信号送受信部41には、 That is, the main signal transmitting and receiving unit 41 for transmitting and receiving main signals between the mobile terminal device (not shown)
交換局30(無線基地局を構成せず)が接続されるとともに、クロック信号発生部42が接続される。 With switching center 30 (not constituting the radio base station) is connected, a clock signal generator 42 is connected. クロック信号発生部42は、通常、交換局30から供給される同期信号に対して伝送路での遅延時間分を補正して、他の無線基地局に供給された同期信号との位相同期をとる。 Clock signal generating unit 42, typically by correcting the delay time in the transmission path with respect to synchronization signals supplied from the exchange station 30, taking the phase synchronization with the synchronization signal supplied to the other radio base station .
そして、その補正された同期信号に同期したクロック信号を発生し、主信号送受信部41に出力する。 Then, generating a clock signal synchronized with the corrected sync signal, and outputs the main signal transmitting and receiving section 41.

【0020】一方、受信部43は、上位局または隣接局から送信された主信号に含まれる同期信号を受信する。 Meanwhile, the receiving unit 43 receives a synchronizing signal contained in the main signal transmitted from the upper station or adjacent station.
受信局指定部44は、受信部43が上位局および隣接局のうちのいずれを受信すべきかを指定する指定部であり、通常は上位局の同期信号を受信するように指定している。 Receiving station designating section 44, the reception section 43 is designated unit for designating whether to receive any of a host station and the adjacent station, typically it is designated to receive a synchronizing signal of the upper station. 位相差検出部45は、受信部43が受信した同期信号と、クロック信号発生部42が出力するクロック信号との位相差を検出し、異常判断部46へ出力する。 Phase difference detecting unit 45, a synchronization signal receiving unit 43 receives, it detects the phase difference between the clock signal the clock signal generating section 42 outputs, to output to abnormality determination unit 46.

【0021】異常判断部46は、まず、位相差検出部4 The abnormality judging section 46, first, a phase difference detector 4
5から送られた、上位局の同期信号とクロック信号発生部42のクロック信号との位相差を所定値と比較し、その位相差が所定値以下ならば、クロック信号発生部42 5 sent, the phase difference between the synchronizing signal and the clock signal of the clock signal generating section 42 of the upper station is compared with a predetermined value, if the phase difference is less than a predetermined value, the clock signal generator 42
に対し、通常のように、交換局30からの同期信号に基づきクロック信号を発生させる。 Hand, as usual, to generate a clock signal based on the synchronizing signal from the exchange 30. 上記所定値は、同期信号(クロック信号)の位相変動が許容される範囲の最大値に設定される。 The predetermined value is set to the maximum value of the range to the phase variation of the synchronization signal (clock signal) is allowed. 一方、その位相差が所定値よりも大きいとき、クロック信号発生部42に対して直前までのクロック信号の発振をそのまま継続させる(所謂、自走状態)とともに、受信局指定部44に対して受信変更指令を出し、受信局指定部44は、受信部43に隣接局の同期信号を受信するように指令する。 On the other hand, then the phase difference is greater than a predetermined value, it is to continue the oscillation of the clock signal immediately before the clock signal generation unit 42 (so-called free-running state) with the reception to the receiving station designating section 44 issues a change command, the receiving station designating section 44 instructs to receive a synchronizing signal of an adjacent station to the receiving unit 43.

【0022】したがって、今度は、位相差検出部45 [0022] Thus, in turn, the phase difference detection unit 45
は、隣接局の同期信号とクロック信号発生部42のクロック信号との位相差を検出し、異常判断部46は、隣接局の同期信号とクロック信号発生部42のクロック信号との位相差を所定値と比較する。 Detects the phase difference between the synchronizing signal and the clock signal of the clock signal generation element 42 of the adjacent station, the abnormality determination section 46, a predetermined phase difference between the clock signal of the synchronous signals of the adjacent stations and the clock signal generator 42 compared with the value. この結果、この位相差が所定値より大きいならば、異常判断部46は、自クロック信号が異常であると判断し、受信局指定部44に上位局を受信指定させるともに、クロック信号発生部42 As a result, if the phase difference is greater than a predetermined value, the abnormality determination section 46 determines that the own clock signal is abnormal, both to receive specify the higher station to the receiving station specification unit 44, a clock signal generator 42
に対し、上位局の同期信号に同期してクロック信号を発生するようにさせる。 To causes to generate a clock signal in synchronization with the synchronizing signal of the upper station. すなわち、クロック信号発生部4 That is, the clock signal generator 4
2へは、異常判断部46を介して上位局の同期信号との位相差が送られ、クロック信号発生部42は、この差が減少するようにクロック信号の位相を制御する。 To 2, the abnormal phase difference between the synchronizing signal of the host station through the determination unit 46 is sent, the clock signal generation unit 42 controls the phase of the clock signal so that the difference is reduced.

【0023】一方、その位相差が所定値以下ならば、異常判断部46は、上位局のクロック信号が異常であると判断し、クロック信号発生部42へ隣接局の同期信号との位相差を送り、クロック信号発生部42で、その位相差が減少するように制御して隣接局の同期信号に同期したクロック信号を発生させる。 On the other hand, if the phase difference is less than a predetermined value, the abnormality determination section 46 determines that the clock signal of the host station is abnormal, the phase difference between the synchronizing signal of an adjacent station to the clock signal generator 42 feed, the clock signal generator 42, the phase difference to generate a clock signal synchronized control to the synchronization signals of the adjacent stations so as to reduce. なお、上位局のクロック信号が異常であると判断するまでの間、クロック信号発生部42は自走状態となるが、クロック信号発生部42 Incidentally, until the clock signal of the higher-level station is determined to be abnormal, the clock signal generator 42 is a free-running state, the clock signal generator 42
の発振回路を安定性のあるもので構成することにより、 By configuring the oscillation by some of stability,
その間の主信号送受信部41の作動を安定させることができる。 It is possible to stabilize the operation of between the main signal transmitting and receiving section 41. さらに、異常判断部46は、交換局30内に設けられた中央監視装置に、上位局(必ずしも直ぐ上位とは限らない)のクロック信号に異常がある旨、および隣接の同期信号配信系統に同期網を変更した旨等を自局コードを添えて報知信号として報知する。 Further, the abnormality determination section 46, the central monitoring unit provided in the exchange station 30, that there is an abnormality in the clock signal of the host station (not necessarily the immediate higher), and the adjacent sync signal distribution system to a synchronization the fact or the like to change the network along with the own station code broadcasts a broadcast signal.

【0024】交換局30の中央監視装置は、各無線基地局からの報知信号に基づき、障害基地局を特定し、特定された無線基地局への発信や着信の規制をかけたり、あるいは早期修復を指令したりする。 The central monitoring unit of the switching station 30, based on the notification signal from the radio base station, to identify the fault base station, or over the regulation of the outgoing or incoming call to the specified wireless base station, or early repair the or instruction.

【0025】図5は、異常判断部46で行われる自局異常または上位局異常の判断の仕方を説明するタイミングチャートである。 FIG. 5 is a timing chart illustrating how the station in abnormal or upper station abnormality determination performed by the abnormality judging section 46. (A),(D)は自局のクロック信号発生部42で発生されるクロック信号を示し、(B), (A), (D) shows a clock signal generated by the clock signal generator 42 of the local station, (B),
(E)は上位局からの同期信号を示し、(C),(F) (E) shows the synchronizing signal from the upper station, (C), (F)
は隣接局からの同期信号を示す。 Denotes a synchronization signal from neighboring stations. (A),(B), (A), (B),
(C)によって自局異常を説明し、(D),(E), It describes own abnormality by (C), (D), (E),
(F)によって上位局異常を説明する。 The upper station abnormalities described by (F).

【0026】まず、自局のクロック信号が、信号51, Firstly, the clock signal of the own station, the signal 51,
52のように異常になると、上位局からの同期信号との間に大きな位相差53が発生し、隣接局からの同期信号との間にも大きな位相差54が発生する。 When 52 becomes abnormal, as a large phase difference 53 is generated between the synchronizing signal from the upper station, a large phase difference 54 also between the sync signals from adjacent stations is generated. したがって、 Therefore,
逆に、位相差53および位相差54が検出されれば、自局のクロック信号に異常があると判別できる。 Conversely, if it is detected phase difference 53 and the phase difference 54, it can be determined that there is an abnormality in the clock signal of its own station.

【0027】つぎに、上位局からの同期信号が、信号5 Next, the synchronization signal from the upper station, signal 5
5,56のように異常になると、自局のクロック信号との間に大きな位相差57が発生するが、隣接局からの同期信号と自局のクロック信号との間の位相差58は許容変動値以上にはならない。 Becomes abnormal as 5,56, a large phase difference 57 between the clock signal of the own station occurs, the phase difference 58 between the clock signal of the synchronizing signal and the own station from the adjacent station allowable variation more than to not value. したがって、逆に、位相差5 Therefore, on the contrary, the phase difference 5
7が検出されても、位相差58が許容変動値より小さいときには、上位局の同期信号(クロック信号)に異常があると判別できる。 Seven is detected, when the phase difference 58 is less than the allowable fluctuation value can be determined and the synchronization signal of the upper station (clock signal) is abnormal.

【0028】上記実施例では、異常判断部46が自局異常と判断したときに、クロック信号発生部42が、上位局の同期信号に同期してクロック信号を発生するようにするが、検出された上位局との位相差が或る判別値より大きいときには、自局に特別な異常が発生した旨を交換局30の中央監視装置に報知するようにして、中央監視装置から自局に対して送信、受信の規制が加えられるようにしてもよい。 [0028] In the above embodiment, when the abnormality determination unit 46 determines that the own station abnormality, the clock signal generation unit 42, but in synchronization with the synchronizing signal of the upper station so as to generate a clock signal, is detected and when the phase difference between the upper station is larger than a certain determined value, so as to notify the subject that special abnormality in its own station is generated on the central monitor of the exchange station 30, with respect to the own station from the building management system transmission, regulation of reception may be added.

【0029】また、上記実施例では、異常判断部46 [0029] In the above embodiment, the abnormality determination section 46
が、位相差検出部45から出力される位相差を所定値と比較し、一度、位相差が所定値より大きいことがあれば即刻、クロック信号発生部42や受信局指定部44へ指令を出力するようにしているが、位相差が所定値より大きいことが所定回数発生したときに、初めてクロック信号発生部42や受信局指定部44へ指令を出力するようにしてもよい。 Output but a phase difference output from the phase difference detecting unit 45 with a predetermined value, once immediately if it phase difference is greater than a predetermined value, an instruction to the clock signal generator 42 and the reception station designating section 44 Although in so doing, when it phase difference is greater than a predetermined value has a predetermined number of times of occurrence, it may be output for the first time instruction to the clock signal generator 42 and the reception station specification unit 44.

【0030】 [0030]

【発明の効果】以上説明したように本発明では、上位無線基地局の同期信号と、下位無線基地局のクロック信号との位相差を検出し、検出した位相差が所定値より大きいときに、隣接無線基地局の同期信号と、下位無線基地局のクロック信号との位相差を検出する。 In the present invention, as described in the foregoing, when a synchronization signal of the upper base stations, detects the phase difference between the clock signal of lower radio base station, the phase difference detected is greater than a predetermined value, a synchronization signal of the adjacent radio base stations, detects a phase difference between the clock signal of the lower base station. 検出された両位相差を多数決論理処理により評価し、上位無線基地局のクロック信号に異常があると判断されたならば、下位無線基地局は、隣接無線基地局の同期信号に追随するように制御する。 The detected both phase difference evaluated by majority logic process, if it is determined that there is an abnormality in the clock signal of the higher-level wireless base station, the lower the radio base station, so as to follow the synchronization signals of the adjacent wireless base station Control. これにより、同期信号配信系統の途中の無線基地局のクロック信号に異常が生じても、その下位の無線基地局の同期調整に支障がでないようにすることができる。 Thus, even if an abnormality occurs in the middle of the clock signal of the radio base station of the synchronous signal distribution system, it is possible to ensure uninterrupted synchronization adjustment of its subordinate radio base stations.

【0031】また、中央監視装置により障害局の特定が可能となるから、通信網の保守監視が容易になる。 Further, since the particular disorder station by the central monitoring device can be, it facilitates the communication network maintenance monitoring. さらに、障害局よりも下位の無線基地局に障害が波及しないため、通信網の運用効率を向上できる。 Furthermore, since the interference will not spread to the lower of the radio base station than disorder station, it is possible to improve the operational efficiency of the network.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の原理説明図である。 1 is a diagram illustrating a principle of the present invention.

【図2】無線基地局間の同期網を示す図である。 2 is a diagram illustrating a synchronous network between the wireless base station.

【図3】同期網の無線基地局間で行われる同期信号の送受信の様子を示す図である。 3 is a diagram showing a state of transmission and reception of the synchronizing signal is performed between the synchronous network of the wireless base station.

【図4】無線基地局の内部構成を示すブロック図である。 4 is a block diagram showing the internal configuration of the wireless base station.

【図5】異常判断部で行われる自局異常または上位局異常の判断の仕方を説明するタイミングチャートである。 5 is a timing chart illustrating how the station in abnormal or upper station abnormality determination performed by the abnormality judging section.

【図6】従来の移動体通信網を示すブロック図である。 6 is a block diagram showing a conventional mobile communication network.

【図7】無線基地局間の同期網を示す図である。 7 is a diagram illustrating a synchronous network between the wireless base station.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 交換局 2 無線基地局(基準同期信号基地局) 3 (上位)無線基地局 4 (下位)無線基地局 4a クロック信号発生手段 4b 第1位相差検出手段 4c 第2位相差検出手段 4d 同期制御手段 5 無線基地局 6 無線基地局 7 (隣接)無線基地局 8 無線基地局 2,3,4,5 第1の同期信号配信系統 2,6,7,8 第2の同期信号配信系統 1 exchange 2 wireless base station (reference sync signal base station) 3 (upper) base station 4 (lower) base station 4a clock signal generating means 4b first phase difference detecting means 4c second phase difference detecting means 4d synchronization control It means 5 wireless base station 6 radio base station 7 (adjacent) radio base station 8 radio base station 2, 3, 4, 5 first synchronizing signal distribution system 2,6,7,8 second synchronizing signal distribution system

Claims (6)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 移動体通信用の交換局(1)と、前記交換局(1)から遅延時間を伴って同期信号が配信される複数の無線基地局(2〜8)とからなる移動体通信網の同期方式において、 前記同期信号に対し前記遅延時間分の位相補正をし、補正された同期信号に従いクロック信号をそれぞれ発生する前記複数の無線基地局(2〜8)の各クロック信号発生手段と、 前記複数の無線基地局(2〜8)のうちの基準同期信号基地局(2)が自己のクロック信号発生手段からのクロック信号に基づき同期信号を自己を除く前記複数の無線基地局(3〜8)に配信するために用いられる複数の同期信号配信系統と、 前記複数の同期信号配信系統のうちの第1の同期信号配信系統(2,3,4,5)の下位無線基地局(4)に設けられ、上位無線基地 1. A switching center for mobile communication (1), consisting of a plurality of radio base stations (2-8) that the synchronizing signal with a delay time from the switching center (1) is delivered mobile in synchronization method of the communication network, the synchronization signal to the said delay time of the phase correction, the corrected sync signal according to the clock signal generator of the plurality of radio base stations for generating a clock signal, respectively (2-8) means and said plurality of radio base stations excluding the self-reference synchronizing signal base station (2) is a synchronization signal based on the clock signal from its own clock signal generator of said plurality of radio base stations (2-8) lower base of the plurality of synchronous signal distribution system used to distribute the (3-8), the first synchronization signal distribution system of the plurality of synchronous signal distribution system (2, 3, 4, 5) It provided the station (4), the upper base 局(3)から送られた同期信号と、前記下位無線基地局(4)のクロック信号発生手段(4a)で発生したクロック信号との位相差を検出する第1位相差検出手段(4b)と、 前記下位無線基地局(4)に設けられ、前記第1位相差検出手段(4b)が検出した位相差が所定値より大きいとき、前記下位無線基地局(4)に隣接する第2の同期信号配信系統(2,6,7,8)の隣接無線基地局(7)から送られた同期信号と、前記下位無線基地局(4)のクロック信号発生手段(4a)で発生したクロック信号との位相差を検出する第2位相差検出手段(4 A sync signal sent from a station (3), first phase difference detecting means for detecting a phase difference between the clock signal generated by the clock signal generating means (4a) of the lower base station (4) and (4b) the provided in the lower radio base station (4), when the phase difference of the first phase difference detection means (4b) detects is greater than a predetermined value, a second synchronous adjacent to the lower radio base station (4) a synchronization signal transmitted from the adjacent radio base stations (7) of the signal distribution system (2,6,7,8), a clock signal generated by the clock signal generating means (4a) of the lower base station (4) and the second phase difference detection means for detecting a phase difference (4
    c)と、 前記第1位相差検出手段(4b)が検出した位相差および前記第2位相差検出手段(4c)が検出した位相差を多数決論理処理により評価し、その結果に基づき前記下位無線基地局(4)のクロック信号発生手段(4a)の同期制御を行う同期制御手段(4d)と、 を有することを特徴とする移動体通信網の同期方式。 And c), the phase difference first phase difference detection means (phase difference 4b) detects and said second phase difference detecting means (4c) detects evaluated by majority logic processing, the lower radio based on the result the base station (4) of the clock signal generating means (4a) of the synchronization method of a mobile communication network that the synchronization control means for synchronizing control (4d), characterized in that it has a.
  2. 【請求項2】 前記同期制御手段(4d)は、前記第1 Wherein said synchronization control means (4d), the first
    位相差検出手段(4b)が検出した位相差および前記第2位相差検出手段(4c)が検出した位相差が、いずれも前記所定値より大きいならば、前記下位無線基地局(4)に異常があると判断し、また、前記第1位相差検出手段(4b)が検出した位相差が前記所定値より大きいが、前記第2位相差検出手段(4c)が検出した位相差が前記所定値以下であれば、前記下位無線基地局(4)よりも上位の前記第1の同期信号配信系統(2, Phase difference a phase difference and said second phase difference detecting means for phase difference detection means (4b) detects (4c) is detected is if both greater than the predetermined value, the abnormality in the lower radio base station (4) determines that there is, also, a phase difference of the first phase difference detection means (4b) detects is greater than the predetermined value, the second phase difference detecting means (4c) the phase difference is the predetermined value detected is if less, the lower the wireless base station (4) the higher than first synchronous signal distribution system (2,
    3,4,5)の無線基地局に異常があると判断するように構成したことを特徴とする請求項1記載の移動体通信網の同期方式。 Synchronization method of a mobile communication network according to claim 1, characterized by being configured to determine that there is an abnormality in the radio base station 3, 4, 5).
  3. 【請求項3】 前記下位無線基地局(4)のクロック信号発生手段(4a)は、前記同期制御手段(4d)により前記下位無線基地局(4)に異常があると判断されたとき、前記上位無線基地局(3)から送られた同期信号に同期したクロック信号を発生するように構成したことを特徴とする請求項2記載の移動体通信網の同期方式。 3. A clock signal generating means of the lower radio base station (4) (4a) when said it is determined that there is an abnormality in the lower radio base station (4) by said synchronous control means (4d), wherein synchronization method of a mobile communication network according to claim 2, characterized by being configured to generate a clock signal synchronized with the synchronizing signal sent from the upper radio base station (3).
  4. 【請求項4】 前記下位無線基地局(4)のクロック信号発生手段(4a)は、前記同期制御手段(4d)により、前記下位無線基地局(4)よりも上位の前記第1の同期信号配信系統(2,3,4,5)の無線基地局に異常があると判断されたとき、前記第2の同期信号配信系統(2,6,7,8)の隣接無線基地局(7)から送られた同期信号に同期したクロック信号を発生するように構成したことを特徴とする請求項2記載の移動体通信網の同期方式。 4. A clock signal generating means of the lower radio base station (4) (4a), said by the synchronization control means (4d), said first synchronizing signal of the higher than lower radio base station (4) when it is determined that there is an abnormality in the radio base station of the delivery system (2, 3, 4, 5), the second synchronization signal distribution system (2,6,7,8) of the adjacent radio base stations (7) synchronization method of a mobile communication network according to claim 2, characterized by being configured to generate a clock signal synchronized with the synchronizing signal sent from.
  5. 【請求項5】 前記同期制御手段(4d)は、前記異常を検出したとき、前記異常の内容および自無線基地局(4)の識別コードを監視制御局に報知するように構成したことを特徴とする請求項2記載の移動体通信網の同期方式。 Wherein said synchronization control means (4d) is, when detecting the abnormality, characterized by being configured the identification code of the abnormality of the contents and the radio base station (4) so ​​as to inform the monitoring control station synchronization method of a mobile communication network of claim 2 wherein.
  6. 【請求項6】 前記監視制御局は、前記報知に基づき障害のある無線基地局を特定し、前記特定された障害無線基地局に対し発信および着信の規制を行うように構成したことを特徴とする請求項5記載の移動体通信網の同期方式。 Wherein said monitoring control station, a characterized in that said identifying a radio base station with impaired based on the notification, and configured to perform regulation of outgoing and incoming to the identified fault radio base station synchronization method of a mobile communication network according to claim 5.
JP17843892A 1992-07-06 1992-07-06 Synchronization method of the mobile communication network Expired - Fee Related JP2989378B2 (en)

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US6252624B1 (en) 1997-07-18 2001-06-26 Idemitsu Kosan Co., Ltd. Three dimensional display
US6983161B2 (en) 1999-09-08 2006-01-03 Nokia Corporation Method for performing frequency synchronization of a base station and a network part
JP2007065847A (en) * 2005-08-30 2007-03-15 Ricoh Co Ltd Information processing system, program and data transfer method
US7245430B2 (en) 2003-04-21 2007-07-17 Ricoh Company, Ltd. Method and apparatus for displaying three-dimensional stereo image using light deflector
JP2017524293A (en) * 2014-08-07 2017-08-24 テレフオンアクチーボラゲット エルエム エリクソン(パブル) Methods and associated access nodes are implemented in the access node to maintain synchronization in the radio access network

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6252624B1 (en) 1997-07-18 2001-06-26 Idemitsu Kosan Co., Ltd. Three dimensional display
US6983161B2 (en) 1999-09-08 2006-01-03 Nokia Corporation Method for performing frequency synchronization of a base station and a network part
US7190963B2 (en) 1999-09-08 2007-03-13 Nokia Corporation Method for performing frequency synchronization of a base station and a network part
US7245430B2 (en) 2003-04-21 2007-07-17 Ricoh Company, Ltd. Method and apparatus for displaying three-dimensional stereo image using light deflector
JP2007065847A (en) * 2005-08-30 2007-03-15 Ricoh Co Ltd Information processing system, program and data transfer method
JP2017524293A (en) * 2014-08-07 2017-08-24 テレフオンアクチーボラゲット エルエム エリクソン(パブル) Methods and associated access nodes are implemented in the access node to maintain synchronization in the radio access network

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