JPH0819038A - Inter-station synchronization system between radio base stations - Google Patents
Inter-station synchronization system between radio base stationsInfo
- Publication number
- JPH0819038A JPH0819038A JP6149812A JP14981294A JPH0819038A JP H0819038 A JPH0819038 A JP H0819038A JP 6149812 A JP6149812 A JP 6149812A JP 14981294 A JP14981294 A JP 14981294A JP H0819038 A JPH0819038 A JP H0819038A
- Authority
- JP
- Japan
- Prior art keywords
- radio base
- station
- base station
- mobile
- base stations
- 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.)
- Pending
Links
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、交換局と複数の無線
基地局および移動機とで構成された移動通信システムに
おける無線基地局間のフレーム同期を移動機を介してと
る局間同期方式に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inter-station synchronization method for performing frame synchronization between radio base stations in a mobile communication system composed of a switching center, a plurality of radio base stations and mobile stations via the mobile stations. It is a thing.
【０００２】[0002]
【従来の技術】従来の無線基地局間の局間同期方式につ
いて図３および図４を用いて説明する。図３において、
ＢＳ１，ＢＳ２は無線基地局、ＭＳは移動機、ＥＸは移
動機ＭＳおよび無線基地局ＢＳ１，ＢＳ２を制御する交
換局であり、これらによって移動通信システムが構成さ
れている。この移動通信システムでは、無線基地局ＢＳ
１，ＢＳ２と移動機ＭＳとの間の通信として、時分割多
重通信（ＴＤＭＡ）方式を使用している。今、移動機Ｍ
Ｓが、図４（ａ）〜（ｅ）に示すように、無線基地局Ｂ
Ｓ１と通信しているものとする。無線基地局ＢＳ１と無
線基地局ＢＳ２との間でフレーム同期をとる場合、無線
基地局ＢＳ２は、移動機ＭＳからの送信々号を受信し、
その送信々号の受信タイミングと無線基地局ＢＳ２での
基準タイミングとの位相差を測定し、無線基地局ＢＳ２
での基準タイミングの位相を調整することで、隣接する
無線基地局ＢＳ１とのフレーム同期をとる（図４（ｆ）
〜（ｊ））参照。2. Description of the Related Art A conventional inter-station synchronization method between radio base stations will be described with reference to FIGS. In FIG.
BS1 and BS2 are radio base stations, MS is a mobile station, and EX is a switching center that controls the mobile station MS and radio base stations BS1 and BS2, and these constitute a mobile communication system. In this mobile communication system, the radio base station BS
The time division multiplex communication (TDMA) system is used as communication between the BS 1, and the mobile station MS. Now mobile device M
S is the radio base station B as shown in FIGS.
Assume that it is communicating with S1. When frame synchronization is established between the radio base station BS1 and the radio base station BS2, the radio base station BS2 receives the transmission signals from the mobile station MS,
The phase difference between the reception timing of the transmission signal and the reference timing in the radio base station BS2 is measured, and the radio base station BS2
The frame synchronization with the adjacent radio base station BS1 is achieved by adjusting the phase of the reference timing in FIG.
~ (J)).
【０００３】すなわち、無線基地局ＢＳ１は、ＴＤＭＡ
信号において、移動機ＭＳからの送信スロットが無線基
地局ＢＳ１における受信されるべきタイミングで受信で
きるように、移動機ＭＳの送信タイミングを早めたり遅
めたりする制御をし、移動機ＭＳと無線基地局ＢＳ１と
の間の距離により生じる伝搬遅延時間の補正を行ってい
る。このような移動機ＭＳへの送信タイミングの位相制
御をタイムアライメントと呼び、このときの位相制御値
をタイムアライメント値と呼んでいる。このとき、移動
機ＭＳと無線基地局ＢＳ１との間は、タイムアライメン
トを確立しているので、無線基地局ＢＳ２での移動機Ｍ
Ｓからの送信々号の受信タイミングと基準タイミングと
の位相差を０とするように、無線基地局ＢＳ２の基準タ
イミングを調整する（特開平２−２３８７３２号公報参
照）。That is, the radio base station BS1 uses the TDMA
In the signal, control is performed to advance or delay the transmission timing of the mobile station MS so that the transmission slot from the mobile station MS can be received at the timing to be received by the radio base station BS1. The propagation delay time caused by the distance from the station BS1 is corrected. Such phase control of the transmission timing to the mobile station MS is called time alignment, and the phase control value at this time is called the time alignment value. At this time, since the time alignment is established between the mobile station MS and the radio base station BS1, the mobile station M at the radio base station BS2.
The reference timing of the radio base station BS2 is adjusted so that the phase difference between the reception timing of the transmission signal from S and the reference timing is zero (see Japanese Patent Laid-Open No. 2-238732).
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、このよ
うな従来の局間同期方式では、無線基地局ＢＳ１，ＢＳ
２と移動機ＭＳとの距離、すなわち図３で示すｄ1 ，ｄ
2 が等距離の場合は、図４（ｇ），（ｈ）に示すタイム
チャートから分かるように、無線基地局ＢＳ２での移動
機ＭＳからの送信々号の受信タイミングと基準タイミン
グとの位相差Ｔ21は無線基地局ＢＳ１，ＢＳ２間の位相
差であるΔＴと等価となり、修正した無線基地局ＢＳ２
の基準タイミングは無線基地局ＢＳ１の基準タイミング
と等しくなる。However, in such a conventional inter-station synchronization system, the radio base stations BS1, BS
2 and the mobile station MS, that is, d 1 and d shown in FIG.
When 2 is equidistant, as can be seen from the time charts shown in FIGS. 4 (g) and 4 (h), the phase difference between the reception timing of the transmission signal from the mobile station MS and the reference timing at the radio base station BS2. T 21 becomes equivalent to ΔT which is the phase difference between the radio base stations BS1 and BS2, and the corrected radio base station BS2
The reference timing of is equal to the reference timing of the radio base station BS1.
【０００５】ところが、ｄ1 ≠ｄ2 の場合は、図４
（ｉ），（ｊ）に示すように、移動機ＭＳからの受信ス
ロットは、無線基地局ＢＳ１とＢＳ２とでは距離による
時間差があるため、移動機ＭＳからの受信スロット２
２，３１のように異なってしまい、位相差Ｔ31はΔＴと
等価にならず、無線基地局ＢＳ１，ＢＳ２間の正確な位
相差を求めることができない。この結果、修正した無線
基地局ＢＳ２の基準タイミングは無線基地局ＢＳ１の基
準タイミングと等しくならず、隣接する無線基地局ＢＳ
１，ＢＳ２間のフレーム同期を正確にとることができな
いという問題が生ずる。However, in the case of d 1 ≠ d 2 , as shown in FIG.
As shown in (i) and (j), the reception slot from the mobile station MS has a time difference depending on the distance between the radio base stations BS1 and BS2.
2 and 31 , the phase difference T 31 is not equal to ΔT, and an accurate phase difference between the radio base stations BS1 and BS2 cannot be obtained. As a result, the corrected reference timing of the radio base station BS2 is not equal to the reference timing of the radio base station BS1, and the adjacent radio base station BS
There arises a problem that the frame synchronization between 1 and BS2 cannot be accurately obtained.
【０００６】本発明はこのような課題を解決するために
なされたもので、その目的とするところは、各無線基地
局と移動機との距離が等距離でない場合にも、無線基地
局間のフレーム同期を正確にとることの可能な局間同期
方式を提供することにある。The present invention has been made in order to solve such a problem, and an object of the present invention is to provide a wireless base station between wireless base stations even when the distance between each wireless base station and a mobile device is not equal. An object of the present invention is to provide an inter-station synchronization method capable of accurately performing frame synchronization.
【０００７】[0007]
【課題を解決するための手段】このような目的を達成す
るために、その第１発明（請求項１に係る発明）は、第
１の無線基地局と通信している移動機へ設定するタイム
アライメント値と、第２の無線基地局での移動機からの
送信々号の受信タイミングと基準タイミングとの位相差
との関係から、第１の無線基地局と第２の無線基地局と
の間のフレーム同期に際しての位相調整値を決定するよ
うにしたものである。また、その第２発明（請求項２に
係る発明）は、第１の無線基地局と通信している移動機
へ設定するタイムアライメント値と、第２の無線基地局
での移動機からの送信々号の受信タイミングと基準タイ
ミングとの位相差と、移動機と第２の無線基地局との距
離によって生じる伝搬遅延時間とから、第１の無線基地
局と第２の無線基地局との間のフレーム同期に際しての
位相調整値を決定するようにしたものである。また、そ
の第３発明（請求項３に係る発明）は、第１の無線基地
局と通信している移動機へ設定するタイムアライメント
値ＴＡと、第２の無線基地局での移動機からの送信々号
の受信タイミングと基準タイミングとの位相差Ｔθと、
移動機と第２の無線基地局との距離によって生じる伝搬
遅延時間ＴＤとの関係から、第１の無線基地局と第２の
無線基地局との間のフレーム同期に際しての位相調整値
ΔＴを、ΔＴ＝ＴＤ−（ＴＡ＋Ｔθ）として決定するよ
うにしたものである。In order to achieve such an object, a first invention (an invention according to claim 1) of the invention is a time set in a mobile device communicating with a first radio base station. From the relationship between the alignment value and the phase difference between the reception timing of each transmission signal from the mobile station at the second radio base station and the reference timing, the first radio base station and the second radio base station are The phase adjustment value at the time of frame synchronization is determined. A second invention (an invention according to claim 2) is a time alignment value set in a mobile device communicating with the first radio base station, and transmission from the mobile device in the second radio base station. From the phase difference between the reception timing of each signal and the reference timing, and the propagation delay time caused by the distance between the mobile station and the second wireless base station, the first wireless base station and the second wireless base station are The phase adjustment value at the time of frame synchronization is determined. A third invention (the invention according to claim 3) is that the time alignment value TA to be set in the mobile device communicating with the first radio base station and the time alignment value TA from the mobile device in the second radio base station. A phase difference Tθ between the reception timing of the transmission signal and the reference timing,
From the relationship between the propagation delay time TD caused by the distance between the mobile device and the second wireless base station, the phase adjustment value ΔT at the time of frame synchronization between the first wireless base station and the second wireless base station is This is determined as ΔT = TD− (TA + Tθ).
【０００８】[0008]
【作用】したがってこの発明によれば、その第１発明で
は、無線基地局ＢＳ１と通信している移動機ＭＳへ設定
するタイムアライメント値ＴＡと、無線基地局ＢＳ２で
の移動機ＭＳからの送信々号の受信タイミングと基準タ
イミングとの位相差Ｔθとの関係から、無線基地局ＢＳ
１，ＢＳ２間のフレーム同期に際しての位相調整値ΔＴ
が決定される。また、その第２発明では、無線基地局Ｂ
Ｓ１と通信している移動機ＭＳへ設定するタイムアライ
メント値ＴＡと、無線基地局ＢＳ２での移動機ＭＳから
の送信々号の受信タイミングと基準タイミングとの位相
差Ｔθと、移動機ＭＳと無線基地局ＢＳ２との距離によ
って生じる伝搬遅延時間ＴＤとの関係から、無線基地局
ＢＳ１，ＢＳ２間のフレーム同期に際しての位相調整値
ΔＴが決定される。また、その第３発明では、ΔＴ＝Ｔ
Ｄ−（ＴＡ＋Ｔθ）として、無線基地局ＢＳ１，ＢＳ２
間のフレーム同期に際しての位相調整値ΔＴが決定され
る。Therefore, according to the first aspect of the present invention, the time alignment value TA set in the mobile station MS communicating with the radio base station BS1 and the transmission from the mobile station MS in the radio base station BS2 are transmitted. From the relationship between the phase difference Tθ between the signal reception timing and the reference timing, the radio base station BS
Phase adjustment value ΔT for frame synchronization between 1 and BS2
Is determined. In the second invention, the wireless base station B
The time alignment value TA set for the mobile station MS communicating with S1, the phase difference Tθ between the reception timing of the transmission signal from the mobile station MS at the radio base station BS2 and the reference timing, the mobile station MS and the radio The phase adjustment value ΔT for frame synchronization between the radio base stations BS1 and BS2 is determined from the relationship with the propagation delay time TD caused by the distance from the base station BS2. In the third invention, ΔT = T
As D- (TA + Tθ), the radio base stations BS1 and BS2
A phase adjustment value ΔT for frame synchronization between the two is determined.
【０００９】[0009]
【実施例】以下、本発明を実施例に基づき詳細に説明す
る。図２は図３に示したシステムを模式的に示した図で
ある。同図において、図３と同一符号は、同一構成要素
を示す。なお、図２において、Ｄ1 は無線基地局ＢＳ１
と移動機ＭＳとの距離、Ｄ2 は無線基地局ＢＳ２と移動
機ＭＳとの距離、Ｄ12は無線基地局ＢＳ１とＢＳ２との
距離を示している。EXAMPLES The present invention will now be described in detail based on examples. FIG. 2 is a diagram schematically showing the system shown in FIG. In the figure, the same reference numerals as those in FIG. 3 denote the same components. In FIG. 2, D 1 is the radio base station BS1.
And the mobile station MS, D 2 indicates the distance between the radio base station BS2 and the mobile station MS, and D 12 indicates the distance between the radio base stations BS1 and BS2.
【００１０】図１はこのシステムに適用された局間同期
方式を説明するためのタイムチャートである。なお、図
１において、Ｓ1 はタイムアライメント前の無線基地局
ＢＳ１での移動機ＭＳからの受信スロット、Ｓ2 はタイ
ムアライメント後の移動機ＭＳからの送信スロット、Ｓ
11はタイムアライメント後の無線基地局ＢＳ１での受信
スロット、Ｓ12はタイムアライメント後の無線基地局Ｂ
Ｓ２での受信スロットである。また、図１（ａ）におけ
る「↑」は無線基地局ＢＳ１での基準タイミング、図１
（ｄ）における「↑」は無線基地局ＢＳ２での基準タイ
ミングを示している。FIG. 1 is a time chart for explaining the inter-station synchronization method applied to this system. In FIG. 1, S 1 is a reception slot from the mobile station MS in the radio base station BS1 before time alignment, S 2 is a transmission slot from the mobile station MS after time alignment, and S 2 is
11 receiving slots in the radio base station BS1 after time alignment, S 12 is the radio base station B after time alignment
This is the reception slot in S2. Further, “↑” in FIG. 1A indicates the reference timing in the radio base station BS1,
"↑" in (d) indicates the reference timing in the radio base station BS2.
【００１１】無線基地局ＢＳ１およびＢＳ２は、それぞ
れその無線基地局での移動機ＭＳからの送信々号の受信
タイミングと基準タイミングとの位相差を測定すること
ができる。また、移動機ＭＳと通信中の無線基地局ＢＳ
１は、移動機ＭＳからの送信々号の受信タイミングと基
準タイミングとの測定位相差Ｔ11によって、自局の受信
タイミング（基準タイミング）にあわせるために、移動
機ＭＳに対して図１（ｂ），（ｃ）に示すようにタイム
アライメント制御を行い、このときのタイムアライメン
ト値Ｔ11を交換局ＥＸに報告する。Each of the radio base stations BS1 and BS2 can measure the phase difference between the reception timing of the transmission signal from the mobile station MS and the reference timing at the radio base station. In addition, the radio base station BS that is in communication with the mobile device MS
1 (b) to the mobile station MS in order to match the reception timing (reference timing) of its own station with the measured phase difference T 11 between the reception timing of the transmission signal from the mobile station MS and the reference timing. ) And (c), the time alignment control is performed, and the time alignment value T 11 at this time is reported to the exchange EX.
【００１２】交換局ＥＸは、無線基地局ＢＳ１より報告
されるタイムアライメント値Ｔ11を用いて、無線基地局
ＢＳ１と移動機ＭＳとの距離Ｄ1 を予測する。また、こ
の予測した距離Ｄ1 と前もって分かっている無線基地局
ＢＳ１とＢＳ２との距離Ｄ12とにより、無線基地局ＢＳ
２と移動機ＭＳとの距離Ｄ2 をＤ2 ＝Ｄ12−Ｄ1 として
求める。そして、この求めた距離Ｄ2 より移動機ＭＳと
無線基地局ＢＳ２との間の伝搬遅延時間ＴD2を求め、無
線基地局ＢＳ２にて測定される移動機ＭＳからの送信々
号の受信タイミングと基準タイミングとの位相差Ｔ12よ
り、無線基地局ＢＳ１，ＢＳ２間の位相差ΔＴをΔＴ＝
ＴD2−（Ｔ11＋Ｔ12）として求める。そして、この求め
たΔＴを位相調整値として、交換局ＥＸは、無線基地局
ＢＳ２の基準タイミングの位相を調整し、無線基地局Ｂ
Ｓ２の基準タイミングを無線基地局ＢＳ１の基準タイミ
ングに合わせ、これによって無線基地局ＢＳ１，ＢＳ２
間のフレーム同期をとる。The exchange EX uses the time alignment value T 11 reported from the radio base station BS1 to predict the distance D 1 between the radio base station BS1 and the mobile station MS. In addition, the predicted distance D 1 and the distance D 12 between the wireless base stations BS1 and BS2 known in advance are used to determine the wireless base station BS.
Obtaining 2 and the distance D 2 between the mobile station MS as D 2 = D 12 -D 1. Then, the propagation delay time T D2 between the mobile station MS and the radio base station BS2 is obtained from the obtained distance D 2, and the reception timing of the transmission signal from the mobile station MS measured by the radio base station BS2 is obtained. From the phase difference T 12 with the reference timing, the phase difference ΔT between the radio base stations BS1 and BS2 is ΔT =
Obtained as T D2 − (T 11 + T 12 ). Then, the exchange station EX adjusts the phase of the reference timing of the radio base station BS2 by using the obtained ΔT as a phase adjustment value, and the radio base station B
The reference timing of S2 is adjusted to the reference timing of the radio base station BS1, so that the radio base stations BS1 and BS2
Frame synchronization between the two.
【００１３】このように、本実施例によれば、交換局Ｅ
Ｘが、無線基地局ＢＳ１と通信をしている移動機ＭＳへ
設定するタイムアライメント値Ｔ11（ＴＡ）により、移
動機ＭＳがどこに位置していても移動機ＭＳと無線基地
局ＢＳ１との距離Ｄ1 を予測し、無線基地局ＢＳ１とＢ
Ｓ２との距離Ｄ12からＤ1 を差し引いて移動機ＭＳと無
線基地局ＢＳ２との距離Ｄ2 を求め、この距離Ｄ2 より
移動機ＭＳと無線基地局ＢＳ２との間の伝搬遅延時間Ｔ
D2（ＴＤ）を求め、この伝搬遅延時間ＴD2（ＴＤ）と無
線基地局ＢＳ２での移動機ＭＳからの送信々号の受信タ
イミングと基準信号との位相差Ｔ12（Ｔθ）と上記タイ
ムアライメント値Ｔ11（ＴＡ）との関係からΔＴを求
め、このΔＴによって無線基地局ＢＳ２の基準タイミン
グの位相を調整することによって、誤差の少ない局間同
期を実現することができる。Thus, according to this embodiment, the exchange E
The time alignment value T 11 (TA) set by X to the mobile station MS communicating with the radio base station BS1 causes the distance between the mobile station MS and the radio base station BS1 regardless of where the mobile station MS is located. Predict D 1 and base stations BS1 and B
From the distance D 12 between the S2, subtracting the D 1 obtains distances D 2 to the mobile station MS and the radio base station BS2, the propagation delay time T between the mobile station MS and the radio base station BS2 than this distance D 2
D2 (TD) is obtained, the propagation delay time T D2 (TD), the phase difference T 12 (Tθ) between the reception timing of the transmission signal from the mobile station MS and the reference signal at the radio base station BS2, and the time alignment described above. By obtaining ΔT from the relationship with the value T 11 (TA) and adjusting the phase of the reference timing of the radio base station BS2 by this ΔT, inter-station synchronization with less error can be realized.
【００１４】[0014]
【発明の効果】以上説明したことから明らかなように本
発明によれば、その第１発明では、無線基地局ＢＳ１と
通信している移動機ＭＳへ設定するタイムアライメント
値ＴＡと、無線基地局ＢＳ２での移動機ＭＳからの送信
々号の受信タイミングと基準タイミングとの位相差Ｔθ
との関係から、無線基地局ＢＳ１，ＢＳ２間のフレーム
同期に際しての位相調整値ΔＴが決定されるものとな
り、また、その第２発明では、無線基地局ＢＳ１と通信
している移動機ＭＳへ設定するタイムアライメント値Ｔ
Ａと、無線基地局ＢＳ２での移動機ＭＳからの送信々号
の受信タイミングと基準タイミングとの位相差Ｔθと、
移動機ＭＳと無線基地局ＢＳ２との距離によって生じる
伝搬遅延時間ＴＤとの関係から、無線基地局ＢＳ１，Ｂ
Ｓ２間のフレーム同期に際しての位相調整値ΔＴが決定
されるものとなり、移動機ＭＳが無線基地局ＢＳ１，Ｂ
Ｓ２から等距離にない場合でも無線基地局間の位相差を
正確に求めることが可能となり、すなわち位相差測定の
対象となる移動機ＭＳの位置に拘らず無線基地局間の位
相差を正確に求めることが可能となり、無線基地局間の
フレーム同期を正確にとることが可能となる。また、そ
の第３発明では、ΔＴ＝ＴＤ−（ＴＡ＋Ｔθ）として、
無線基地局ＢＳ１，ＢＳ２間のフレーム同期に際しての
位相調整値ΔＴが決定されるものとなり、位相調整値Δ
Ｔを適確な値として求めることができる。As is apparent from the above description, according to the present invention, in the first invention, the time alignment value TA set to the mobile station MS communicating with the radio base station BS1 and the radio base station are set. Phase difference Tθ between the reception timing of the transmission signal from the mobile station MS at BS2 and the reference timing
From this relationship, the phase adjustment value ΔT at the time of frame synchronization between the radio base stations BS1 and BS2 is determined, and in the second invention, the phase adjustment value ΔT is set in the mobile station MS communicating with the radio base station BS1. Time alignment value T
A, and a phase difference Tθ between the reception timing of the transmission signal from the mobile station MS at the radio base station BS2 and the reference timing,
From the relationship between the propagation delay time TD caused by the distance between the mobile device MS and the radio base station BS2, the radio base stations BS1 and B
The phase adjustment value ΔT at the time of frame synchronization between S2 is determined, and the mobile station MS sets the radio base stations BS1, B
It is possible to accurately obtain the phase difference between the radio base stations even when they are not equidistant from S2, that is, the phase difference between the radio base stations is accurately obtained regardless of the position of the mobile station MS targeted for the phase difference measurement. Therefore, it is possible to accurately obtain frame synchronization between the radio base stations. In the third invention, ΔT = TD- (TA + Tθ)
The phase adjustment value ΔT at the time of frame synchronization between the radio base stations BS1 and BS2 is determined, and the phase adjustment value ΔT
It is possible to obtain T as an accurate value.
【図１】 本発明に係る局間同期方式を説明するための
タイムチャートである。FIG. 1 is a time chart for explaining an inter-station synchronization method according to the present invention.
【図２】 図３に示したシステムを模式的に示した図で
ある。FIG. 2 is a diagram schematically showing the system shown in FIG.
【図３】 移動通信システムのシステム構成図である。FIG. 3 is a system configuration diagram of a mobile communication system.
【図４】 従来の局間同期方式を説明するためのタイム
チャートである。FIG. 4 is a time chart for explaining a conventional inter-station synchronization method.
ＢＳ１，ＢＳ２…無線基地局、ＭＳ…移動機、ＥＸ…交
換局、Ｔ11…位相差（タイムアライメント値）、Ｔ12…
位相差、ＴD2…伝搬遅延時間、ΔＴ…位相差（位相調整
値）。BS1, BS2 ... wireless base station, MS ... mobile, EX ... switching center, T 11 ... phase difference (time alignment value), T 12 ...
Phase difference, T D2 ... Propagation delay time, ΔT ... Phase difference (phase adjustment value).
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｈ０４Ｑ 7/24 7/26 7/30 Ｈ０４Ｑ 7/04 Ａ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical indication H04Q 7/24 7/26 7/30 H04Q 7/04 A
Claims (3)
とで構成された移動通信システムにおける無線基地局間
のフレーム同期を移動機を介してとる局間同期方式にお
いて、 第１の無線基地局と通信している移動機へ設定するタイ
ムアライメント値と、第２の無線基地局での前記移動機
からの送信々号の受信タイミングと基準タイミングとの
位相差との関係から、前記第１の無線基地局と前記第２
の無線基地局との間のフレーム同期に際しての位相調整
値を決定するようにしたことを特徴とする無線基地局間
の局間同期方式。1. An inter-station synchronization method in which frame synchronization between radio base stations in a mobile communication system composed of an exchange, a plurality of radio base stations, and mobile units is performed via the mobile units, and a first radio base is provided. From the relationship between the time alignment value set in the mobile station communicating with the station and the phase difference between the reception timing of the transmission signal from the mobile station and the reference timing in the second radio base station, Wireless base station and the second
Inter-station synchronization method between radio base stations, characterized in that a phase adjustment value at the time of frame synchronization with the radio base stations is determined.
とで構成された移動通信システムにおける無線基地局間
のフレーム同期を移動機を介してとる局間同期方式にお
いて、 第１の無線基地局と通信している移動機へ設定するタイ
ムアライメント値と、第２の無線基地局での前記移動機
からの送信々号の受信タイミングと基準タイミングとの
位相差と、前記移動機と前記第２の無線基地局との距離
によって生じる伝搬遅延時間との関係から、前記第１の
無線基地局と前記第２の無線基地局との間のフレーム同
期に際しての位相調整値を決定するようにしたことを特
徴とする無線基地局間の局間同期方式。2. An inter-station synchronization method in which frame synchronization between radio base stations in a mobile communication system composed of an exchange, a plurality of radio base stations, and mobile units is carried out via the mobile units. Time alignment value to be set in the mobile device communicating with the station, the phase difference between the reception timing of the transmission signal from the mobile device and the reference timing in the second radio base station, the mobile device and the first The phase adjustment value for frame synchronization between the first wireless base station and the second wireless base station is determined from the relationship with the propagation delay time caused by the distance from the second wireless base station. An inter-station synchronization method between radio base stations characterized by the following.
とで構成された移動通信システムにおける無線基地局間
のフレーム同期を移動機を介してとる局間同期方式にお
いて、 第１の無線基地局と通信している移動機へ設定するタイ
ムアライメント値ＴＡと、第２の無線基地局での前記移
動機からの送信々号の受信タイミングと基準タイミング
との位相差Ｔθと、前記移動機と前記第２の無線基地局
との距離によって生じる伝搬遅延時間ＴＤとから、前記
第１の無線基地局と前記第２の無線基地局との間のフレ
ーム同期に際しての位相調整値ΔＴを、ΔＴ＝ＴＤ−
（ＴＡ＋Ｔθ）として決定するようにしたことを特徴と
する無線基地局間の局間同期方式。3. An inter-station synchronization system in which frame synchronization between radio base stations in a mobile communication system composed of an exchange, a plurality of radio base stations and a mobile unit is performed via the mobile unit, wherein a first radio base station is provided. A time alignment value TA set for a mobile station communicating with the station, a phase difference Tθ between a reception timing of a transmission signal from the mobile station and a reference timing at the second radio base station, and the mobile station. From the propagation delay time TD caused by the distance to the second wireless base station, the phase adjustment value ΔT for frame synchronization between the first wireless base station and the second wireless base station is ΔT = TD-
An inter-station synchronization method between radio base stations characterized in that it is decided as (TA + Tθ).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6149812A JPH0819038A (en) | 1994-06-30 | 1994-06-30 | Inter-station synchronization system between radio base stations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6149812A JPH0819038A (en) | 1994-06-30 | 1994-06-30 | Inter-station synchronization system between radio base stations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0819038A true JPH0819038A (en) | 1996-01-19 |
Family
ID=15483254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6149812A Pending JPH0819038A (en) | 1994-06-30 | 1994-06-30 | Inter-station synchronization system between radio base stations |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0819038A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1170881A1 (en) * | 2000-07-06 | 2002-01-09 | Nec Corporation | Mobile communication system and method and mobile stations and base stations in the system |
| JP2006173851A (en) * | 2004-12-14 | 2006-06-29 | Nec Corp | Adaptive transmission timing control system |
| WO2007023767A1 (en) * | 2005-08-23 | 2007-03-01 | Ntt Docomo, Inc. | Base station and communication system |
-
1994
- 1994-06-30 JP JP6149812A patent/JPH0819038A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1170881A1 (en) * | 2000-07-06 | 2002-01-09 | Nec Corporation | Mobile communication system and method and mobile stations and base stations in the system |
| JP2006173851A (en) * | 2004-12-14 | 2006-06-29 | Nec Corp | Adaptive transmission timing control system |
| WO2007023767A1 (en) * | 2005-08-23 | 2007-03-01 | Ntt Docomo, Inc. | Base station and communication system |
| US7912030B2 (en) | 2005-08-23 | 2011-03-22 | Ntt Docomo, Inc. | Base station and communication system |
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