JP3254649B2 - Wireless communication control method for mobile communication - Google Patents
Wireless communication control method for mobile communicationInfo
- Publication number
- JP3254649B2 JP3254649B2 JP18405993A JP18405993A JP3254649B2 JP 3254649 B2 JP3254649 B2 JP 3254649B2 JP 18405993 A JP18405993 A JP 18405993A JP 18405993 A JP18405993 A JP 18405993A JP 3254649 B2 JP3254649 B2 JP 3254649B2
- Authority
- JP
- Japan
- Prior art keywords
- base station
- reception level
- zone
- station
- communication
- 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 - Fee Related
Links
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】この発明は複数の無線ゾーンでサ
ービスエリアをカバーし、各無線ゾーンに基地局をそれ
ぞれ設け、基地局から通知された周辺無線ゾーンの監視
チャネルの受信レベルを、通信中に移動局で測定し、、
その測定受信レベル情報を基地局へ報告し、基地局およ
びその周辺無線ゾーンの基地局は報告された受信レベル
情報に基づいて無線回線(通話チャネル)の使用可否を
判断する移動通信の無線回線制御方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention covers a service area with a plurality of radio zones, provides base stations in each radio zone, and communicates the reception level of a monitoring channel of a peripheral radio zone notified from the base station. At the mobile station,
The measured reception level information is reported to the base station, and the base station and the base stations in the surrounding radio zones determine the availability of the radio channel (communication channel) based on the reported reception level information. About the method.
【0002】[0002]
【従来の技術】従来、ディジタル移動通信システムにお
いて、基地局は通話中の移動局に対して、その移動局が
在圏する無線ゾーンの周辺の無線ゾーンの監視チャネル
(通常制御チャネル)を通知し、この通知を受けた移動
局は時分割多重方式の空き時間を使用して、その周辺無
線ゾーンの監視チャネルの受信レベルを測定する。測定
を行った移動局は、測定した受信レベルの内、基地局か
ら通知された条件、例えばあるレベル以上を満たすもの
をレベル順にソートし、その監視チャネルと受信レベル
とを基地局に報告する。移動局では通話チャネルの受信
レベルも測定し、その受信レベルも基地局へ報告する。
基地局では移動局から報告された受信レベル情報より、
ゾーン切替時期になったかを判定する。即ち通話チャネ
ルの受信レベルが所定値以下になると、あるいは監視チ
ャネルの受信レベルの最大のものが通話チャネルの受信
レベルより、所定値以上大きくなると、ゾーン切替時期
と判定して、最大受信レベルの監視チャネルの無線ゾー
ンの基地局にその受信レベルを送って、それが通話可能
レベルであるか否か、また通話可能レベルであれば空通
話チャネルがあるかを問い合わせ、つまりチャネル切替
えの回線状態を問い合わせ、通話可能で空通話チャネル
があって、そのチャネル番号の通知を受けると、その通
話チャネルに切替えるように移動局へ指示する。2. Description of the Related Art Conventionally, in a digital mobile communication system, a base station notifies a busy mobile station of a monitoring channel (normal control channel) of a wireless zone around a wireless zone in which the mobile station is located. The mobile station that has received the notification measures the reception level of the monitoring channel in the surrounding wireless zone using the idle time of the time division multiplexing method. The mobile station that has performed the measurement sorts, among the measured reception levels, those that satisfy the condition notified from the base station, for example, those that satisfy a certain level or higher, in order of level, and reports the monitoring channel and the reception level to the base station. The mobile station also measures the reception level of the communication channel and reports the reception level to the base station.
At the base station, from the reception level information reported from the mobile station,
It is determined whether it is time to switch zones. That is, when the reception level of the communication channel is lower than a predetermined value, or when the maximum reception level of the monitoring channel is higher than the reception level of the communication channel by a predetermined value or more, it is determined that the zone is to be switched and the maximum reception level is monitored. Sends the reception level to the base station in the radio zone of the channel, and inquires whether the reception level is a communication level or, if the communication level is available, whether there is an idle communication channel, that is, inquires about the channel state of the channel switching. When the communication is available and there is an idle communication channel and the notification of the channel number is received, the mobile station is instructed to switch to the communication channel.
【0003】各基地局ではその無線ゾーンの平均トラヒ
ック量の制限により決まる各無線ゾーンの大きさや、各
無線ゾーンの地上の状況が主として高層建築物か、田畑
かなどにより異なる電波伝搬状態などから、各基地局ご
とにその基地局の無線ゾーン内の移動局の許容通話受信
レベルが決められ、その基準レベルがその基地局内に設
定されている。従って、チャネル切替時期になると、通
話中の基地局は移動局からの受信レベル情報に基づき、
チャネル切替えの回線状態の問い合わせを最も受信レベ
ルが大きい監視チャネルの基地局へ行い、その基地局で
チャネル切替えができない場合は、次に受信レベルが大
きい監視チャネルの基地局へ問い合わせを行い、以下同
様に行う。[0003] In each of the base stations and the size of each radio zone, which is determined by the limit of the average traffic volume of the radio zone, each radio zone the ground situation of or mainly high-rise buildings, fields or from etc. of different radio wave propagation state and the like For each base station, an allowable call reception level of a mobile station in a wireless zone of the base station is determined, and the reference level is set in the base station. Accordingly, when a channel switching time, through
The busy base station is based on the reception level information from the mobile station,
Most receiving level of the line state of the channel switching inquiry
When the channel is not switched by the base station of the monitoring channel with the largest reception level, an inquiry is made to the base station of the monitoring channel with the next highest reception level, and so on.
【0004】[0004]
【発明が解決しようとする課題】従来においては前述し
たように移動局から報告された受信レベル情報にもとづ
き、その最大受信レベルから順にその監視チャネルの基
地局へチャネル切替えの回線状態問い合わせを行ってい
た。しかし、場合によってはある無線ゾーンの通話チャ
ネルに極力切替えたい場合があるが、移動局の最大受信
レベル情報を無線ゾーンの選択条件としている従来にお
いてはこのようなことはできなかった。Conventionally, as described above, based on the reception level information reported from the mobile station, the line state inquiry for the channel switching is made to the base station of the monitoring channel in order from the maximum reception level. Was. However, in some cases some cases want as much as possible switch to speech channel of the radio zone but there Ru, maximum reception of the mobile station
In the related art, where the level information is used as the selection condition of the wireless zone, this cannot be performed.
【0005】例えばシステムが複数周波数帯として2つ
の周波数帯AとB,例えば800MHz 帯と1.5GHz 帯を
もち、図5に示すように周波数帯Aの無線ゾーン1〜7
と、周波数帯Bの無線ゾーン1′〜7′がそれぞれほゞ
同じゾーン形状でオーバーラップして設けられ、つまり
無線ゾーン1と無線ゾーン1′とがオーバーラップさ
れ、無線ゾーン2と無線ゾーン2′とがオーバーラップ
し、以下同様にオーバーラップしているシステムを考え
る。無線ゾーン1〜7にそれぞれ基地局8〜14が、無
線ゾーン1′〜7′にそれぞれ基地局8′〜14′が設
けられ、基地局8〜14にそれぞれ周波数帯Aの監視チ
ャネル(制御チャネル)N1〜N7が割り当てられ、基
地局8′〜14′にそれぞれ周波数帯Bの監視チャネル
(制御チャネル)N1′〜N7′が割り当てられ、また
基地局8〜14のそれぞれに周波数帯Aの複数の通話チ
ャネルが割り当てられ、基地局8′〜14′のそれぞれ
に周波数帯Bの複数の通話チャネルが割り当てられてい
る。移動局15はそれが在圏している無線ゾーン、図で
は2および2′の基地局9および9′の何れとも、つま
り周波数帯A,Bの何れの監視チャネルおよび通話チャ
ネルを通じて通信することができる。そして移動局15
は移動に伴う無線ゾーンの通過時に図6に示すように、
周波数帯Aの通話チャネルから周波数帯Aの通話チャネ
ルに、周波数帯Aの通話チャネルから周波数帯Bの通話
チャネルにそれぞれチャネル切替えをすることができ、
同様に周波数帯Bの通話チャネルから周波数帯Bまたは
Aの何れの通話チャネルにチャネル切替えをすることが
できる。[0005] For example the system has two frequency bands A and B as a multi-band, for example, 800MHz band and 1.5GHz band, the radio zone 1-7 of the frequency band A, as shown in FIG. 5
And the radio zones 1 'to 7 ' of the frequency band B are provided so as to overlap each other with almost the same zone shape, that is, the radio zone 1 and the radio zone 1 'overlap, and the radio zone 2 and the radio zone 2 ′ Overlap, and so on.
You . Base stations 8 to 14 are provided in wireless zones 1 to 7 , respectively, and base stations 8 'to 14' are provided in wireless zones 1 'to 7 ', respectively. ) N1~N 7 are assigned, 'monitoring channel (control channel for each frequency band B in) N1'~N 7' base station 8'~14 is assigned, also the frequency bands a to each of the base stations 8-14 Are allocated, and each of the base stations 8 'to 14' is allocated a plurality of communication channels in the frequency band B. The mobile station 15 can communicate with any of the base stations 9 and 9 'in the wireless zone in which it is located, 2 and 2' in the figure, that is, through any of the monitoring channels and speech channels in the frequency bands A and B. it can. And mobile station 15
As shown in FIG. 6 when passing through the wireless zone accompanying the movement,
Channel switching can be performed from the communication channel of the frequency band A to the communication channel of the frequency band A, and from the communication channel of the frequency band A to the communication channel of the frequency band B, respectively.
Similarly, the channel can be switched from the communication channel of the frequency band B to any of the communication channels of the frequency band B or A.
【0006】このように複数周波数帯、例えば800MH
z 帯と1.5GHz 帯とを収容する移動通信システムにおい
て、基地局が通話中の移動局に対して、複数周波数帯に
またがる周辺無線ゾーン、つまり800MHz 帯使用の周
辺無線ゾーンと1.5GHz 帯使用の周辺無線ゾーンの監視
チャネルを通知すると、移動局は、その各監視チャネル
を測定し、測定したものの内基地局の通知する条件を満
たすものを、基地局より通知されたゾーン数だけ、その
受信レベル順に報告する。従って、周波数帯が異なる
と、伝播特性の違いから優劣の差が生じるため、例えば
1.5GHz 帯で通話可能な受信レベルのものがあるにも係
わらず、伝播特性の良い周波数帯、例えば800MHz 帯
の監視チャネルばかりを移動局が報告することになり、
その周波数帯(800MHz )の通話チャネルが輻輳して
しまう恐れがある。As described above, a plurality of frequency bands, for example, 800 MHz
In a mobile communication system accommodating the z-band and the 1.5-GHz band, the base station gives a mobile station that is in a call a peripheral radio zone that covers a plurality of frequency bands, that is, a peripheral radio zone that uses the 800 MHz band and a 1.5-GHz band. When notifying the monitoring channels of the peripheral wireless zones in use, the mobile station measures each of the monitoring channels, and, among the measured ones, the one that satisfies the condition to be notified by the base station, the number of zones notified by the base station, Report in order of reception level. Therefore, if the frequency band is different, a difference in superiority is generated due to a difference in propagation characteristics.
In spite of the reception level that allows communication in the 1.5 GHz band, the mobile station reports only a monitoring channel in the frequency band with good propagation characteristics, for example, the 800 MHz band,
There is a possibility that the communication channel of the frequency band (800 MHz) will be congested.
【0007】このような点から、基地局から移動局へ周
辺無線ゾーンの監視チャネルを通知する際に、周波数帯
A,Bの各監視チャネルを通知すると共に、周波数Aと
Bとの伝播特性にもとづくレベル差を補正するための補
正値αも通知し、移動局では測定した受信レベル中の周
波数帯Bについては、それぞれ補正値αを加算して補正
を行い、その補正した受信レベルと周波数帯Aの受信レ
ベルとをレベル順にソートして、その受信レベルの報告
を基地局へすることが考えられる。[0007] From such a point, when the base station notifies the mobile station of the monitoring channel of the surrounding radio zone, the monitoring channels of the frequency bands A and B are notified and the propagation characteristics of the frequencies A and B are changed. The correction value α for correcting the underlying level difference is also notified, and the mobile station performs correction by adding the correction value α to each of the frequency bands B in the measured reception level. The corrected reception level and frequency band It is conceivable that the reception level of A is sorted in order of level, and the reception level is reported to the base station.
【0008】しかるに、この場合以下の様な問題が起こ
りえる。移動局が補正を行ったチャネルと行わないチャ
ネルとを関係なしにレベル順にソートし、通話中の無線
ゾーン(ゾーン1)の基地局(基地局8)に報告する。
基地局8は移動局から通知された監視チャネルのレベル
が補正されているか、補正されていないかに係わらず、
受信レベルが最大の無線ゾーン(ゾーン2)に移動局か
ら報告された受信レベルを情報としてそのゾーン2の基
地局9に無線回線を問い合わせる。問い合わせを受けた
ゾーン2の基地局9では情報として受けた受信レベルが
そのゾーン2で通話可能なレベルかどうかを判断し、か
つ空き回線があれば問い合わせ元の基地局8にその空き
回線を応答し、実際に移動局はゾーン2のその空き回線
にチャネル切替えを行うわけだが、問い合わせを受けた
基地局9が情報として受信した受信レベルが補正されて
いるため、実際のレベルがその無線ゾーンでの通話可能
なレベルに満たないときには、チャネル切替えをした後
に通話の品質が悪化する現象が起こり、基地局9は再び
チャネル切替先を探しに行くような制御が働いてしま
い、またレベル補正された監視チャネルに対する無線ゾ
ーンを選択してしまうと以上の操作が繰り返され、周波
数のばたつきが起こる恐れがある。However, in this case, the following problem may occur. The mobile station sorts the channels for which correction has been performed and the channels for which correction has not been performed in order of level without relation, and reports the result to the base station (base station 8 ) in the radio zone (zone 1) during the call.
Regardless of whether the level of the monitoring channel notified from the mobile station is corrected or not, the base station 8
The base station 9 in the zone 2 is inquired about the radio line using the reception level reported from the mobile station in the radio zone (zone 2) having the highest reception level as information. The base station 9 of the zone 2 receiving the inquiry determines whether the reception level received as the information is a level at which communication is possible in the zone 2 and, if there is a free line, returns the free line to the base station 8 of the inquiry source. Then, the mobile station actually switches the channel to the vacant line in the zone 2, but since the reception level received as information by the inquired base station 9 is corrected, the actual level is changed in the wireless zone. When the level is less than the level at which the call can be made, the quality of the call deteriorates after the channel is switched, and the base station 9 is controlled again to search for the channel switch destination, and the level is corrected. If a wireless zone for the monitoring channel is selected, the above operation is repeated, and there is a possibility that the frequency fluctuates.
【0009】[0009]
【課題を解決するための手段】請求項1の発明によれ
ば、サービスエリアに複数の周波数帯が用いられ、移動
局がその何れの周波数帯でも基地局と通信可能とされ、
移動局では監視チャネルの測定受信レベルに対して、周
波数帯間にわたる補正を行い、その補正した状態で基地
局へ報告し、基地局で受信レベルの補正を行って移動局
での補正分を元に戻す。 According to the first aspect of the present invention , a plurality of frequency bands are used for a service area, and
The station can communicate with the base station in any of its frequency bands,
In the mobile station, the measured reception level of the monitoring channel
Make corrections across the wavenumber bands, and
Report to the station, correct the reception level at the base station, and
Undo the correction in.
【0010】請求項2の発明によれば、基地局は回線の
使用可否を判断する際に、移動局から報告された受信レ
ベルを補正して行う。つまり、問い合わせ先の基地局で
チャネル切替えをなるべく行いたい場合は、移動局から
のその受信レベルに対しあるレベルを加算した受信レベ
ルで問い合わせを行い、逆にチャネル切替えを行わせた
くない場合は報告された受信レベルからあるレベルを減
算した受信レベルで問い合わせを行う。 [0010] According to the second aspect of the present invention, the base station is connected to the line.
When judging the availability, the reception level reported from the mobile station is used.
Perform by correcting the bell. In other words, at the base station
If you want to switch channels as much as possible,
Reception level obtained by adding a certain level to that reception level
Inquired by the user and conversely switched the channel
If not, subtract a certain level from the reported reception level.
An inquiry is made at the calculated reception level.
【0011】[0011]
【実施例】まず請求項1の発明の実施例を図1を参照し
て説明する。移動局から報告された周辺無線ゾーンとそ
の受信レベルを受けた基地局1(ステップS1 )は最大
受信レベルに補正が行われた場合、補正前のレベルに戻
したレベルを情報として、受信レベルが最大の周辺無線
ゾーン2の基地局2に無線回線を問い合わせる信号を送
信する(ステップS2 )。次に問い合わせを受信した基
地局2は情報として送られてきた移動局の受信レベルが
そのゾーンで通話できる条件を満たし、かつ空き回線が
ある場合に、問い合わせ先の基地局1に空き回線有りの
応答を返す(ステップS3 )。応答を受けた基地局1は
通話中の移動局にその旨を通知し(ステップS4 ),移
動局は通知されたゾーン2の周波数にチャネル切替えを
行う(フテップS5 )。EXAMPLES First a description will be given of an embodiment of the invention of claim 1 with reference to FIG. If mobile base station received the reported neighboring radio zone and its reception level from station 1 (Step S 1) is the correction to the maximum reception level has been performed, the level was returned to the level before correction as information, receiving Peripheral radio with the highest level
A signal for inquiring about a wireless line is transmitted to the base station 2 in the zone 2 (step S 2 ). The base station 2 receives the inquiry then satisfies the condition reception level of the mobile station sent the information <br/> can call on that zone, and if there is a vacant line, to contact the base station 1 It returns a response there is free access to (step S 3). Upon receiving the response, the base station 1 notifies the mobile station in communication (step S 4 ), and the mobile station switches the channel to the notified zone 2 frequency (step S 5 ).
【0012】この実施例を図5に示した移動通信システ
ムに適用した場合を図2を参照して具体的に説明する。
移動局15が無線ゾーン番号2の無線ゾーン2にいて、
その無線ゾーン2の基地局9から移動局15に周辺無線
ゾーンの監視チャネル番号を通知するが、その際、移動
局15は周波数帯Aで通話中であるため、図2Bに示す
ように先ず周波数帯Aの周辺ゾーン番号1と3の各監視
チャネル番号N1,N3を通知し、次に補正レベルαを
通知し、その後、周波数帯Bの周辺ゾーン番号1′,
2′,3′の各監視チャネル番号N1′,N2′,N
3′を通知する。この通知を受けた移動局15は周辺無
線ゾーンからの監視チャネルの受信レベルを測定し、監
視チャネルN1,N2,N3,N1′,N2′,N3′
の各受信レベルがそれぞれE1,E2,E3,E1′,
E2′,E3′であり、図3Aに示すようであったとす
る。移動局15はさらに周波数帯Bの監視チャネルN
1′,N2′,N3′の受信レベルE1′,E2′,E
3′に補正値αを加え、その後図3Bに示すようにレベ
ル順にソートし、図2Cに示すようにレベル順にゾーン
番号とその受信レベル、補正されたものは補正後の受信
レベルとを基地局9に報告する。A case where this embodiment is applied to the mobile communication system shown in FIG. 5 will be specifically described with reference to FIG.
Mobile station 15 is in wireless zone 2 of wireless zone number 2;
The base station 9 in the wireless zone 2 notifies the mobile station 15 of the monitoring channel number of the surrounding wireless zone. At this time, since the mobile station 15 is in a call in the frequency band A, first, as shown in FIG. notifies each monitoring channel numbers N1, N 3 near zone number 1 and 3 of the strip a, then notifies the correction level alpha, then the peripheral zone number 1 in the frequency band B ',
2 ', 3' monitoring channel numbers N1 ', N2', N
Notify 3 '. The mobile station 15 having received the notification measures the reception level of the monitoring channel from the peripheral wireless zone, and monitors the monitoring channels N1, N2, N3, N1 ', N2', N3 '.
Are respectively E1, E2, E3, E1 ',
E2 'and E3', as shown in FIG. 3A. The mobile station 15 further includes a monitor channel N of the frequency band B.
1 ', N2', 'reception level E 1 of the' N3, E2 ', E
3 'is added to the correction value .alpha., And then sorted in order of level as shown in FIG. 3B. As shown in FIG. 2C, the zone numbers and their reception levels are sorted in order of level, and the corrected reception level is used as the base station. Report to 9.
【0013】この受信レベル情報の報告を受けた基地局
9は、先ず一番受信レベルの高い監視チャネル番号N
1′からその無線ゾーン1′を割り出し、その無線ゾー
ン1′の基地局8′に、受信レベルE1′+αを補正前
のレベルE1′に直したレベルを受信レベル情報として
無線回線の問い合わせを行う(図4)。その問い合わせ
を受けた基地局8′は受信されたレベルE1′が通話可
能なレベルか否かを判断し、通話可能かつ、空き回線が
あった場合、その回線のチャネルコードを問い合わせ先
の基地局9に送信する。それを受けた現在通話中の基地
局9は移動局15に報告されたチャネルコードに切り替
えるように通知し、移動局15はその通話チャネルに切
り替えることによりゾーン移行を完了する。The base station 9 having received the report of the reception level information first monitors the monitoring channel number N having the highest reception level.
The wireless zone 1 'is determined from the wireless zone 1', and the base station 8 'of the wireless zone 1' is inquired about the wireless line using the level obtained by converting the reception level E1 '+ α to the level E1' before correction as reception level information. (FIG. 4). The base station 8 'that has received the inquiry determines whether the received level E1' is a level at which communication is possible and, if there is an available line and a vacant line, determines the channel code of that line at the base station of the inquiry destination. 9 Receiving the notification, the base station 9 currently engaged in the communication notifies the mobile station 15 to switch to the channel code reported, and the mobile station 15 completes the zone transfer by switching to the communication channel.
【0014】請求項2の発明では、移動通信システムが
1つの周波数帯を使用する場合も、複数の周波数帯を使
用する場合にも適用することができ、例えば移動局15
は周辺ゾーンの監視チャネルN1,N3,N4のみが通
知され、その各監視チャネルN1,N3,N4の測定受
信レベルE1,E3,E4を基地局9へ対応監視チャネ
ルと共に通知する。基地局9では受信レベルE1が最大
の場合で、その監視チャネルN1の基地局8の通話チャ
ネルになるべく切り替えさせたい場合は、受信レベルE
1に補正値βを加算して受信レベルとして基地局8へ無
線回線の問い合わせを行う。基地局8では受信した受信
レベルが大きいから、通常は基準値より大となり、空き
回線を探すことになる。According to the second aspect of the present invention, the present invention can be applied to a case where the mobile communication system uses one frequency band and a case where the mobile communication system uses a plurality of frequency bands.
Is notified only of the monitoring channels N1, N3 and N4 in the peripheral zone, and notifies the base station 9 of the measured reception levels E1, E3 and E4 of the monitoring channels N1, N3 and N4 together with the corresponding monitoring channels. In the case where the reception level E1 is the maximum at the base station 9, if it is desired to switch to the communication channel of the base station 8 of the monitoring channel N1 as much as possible, the reception level E1
Then, the base station 8 is inquired of the wireless line as the reception level by adding the correction value β to 1. Since the received level of the received signal is high at the base station 8, it is usually higher than the reference value, and a free line is searched.
【0015】逆に受信レベルE1が最大であるが、基地
局8の通話チャネルに切り替えさせたくない場合は、E
1より補正値γを減算して受信レベルとして基地局8へ
無線回線の問い合わせを行う。この場合、その受信レベ
ルが基地局8の基準値以下になって切り替えできないと
いう応答となる可能性が大となる。また移動局15の通
話チャネルのレベルが通話不能に近い状態になった場合
は、直ちに何れかの無線ゾーンの通話チャネルに切り替
えなければならず、このような場合は、移動局から報告
された受信レベルに一定値を加算して各基地局へ無線回
線問い合わせ時の受信レベルとすればよい。Conversely, if the reception level E1 is the maximum, but it is not desired to switch to the communication channel of the base station 8, E1
The correction value γ is subtracted from 1 and the base station 8 is inquired about the wireless channel as the reception level. In this case, there is a large possibility that a response indicating that the reception level becomes lower than the reference value of the base station 8 and the switching cannot be performed is obtained. Further, when the level of the communication channel of the mobile station 15 becomes close to a state in which communication is not possible, it is necessary to immediately switch to the communication channel of any one of the radio zones. What is necessary is just to add a constant value to the level and use it as the reception level at the time of inquiring the wireless link to each base station.
【0016】このように移動局から報告された受信レベ
ルに対して補正を行うことは、周波数帯を複数使用する
場合にも適用でき、その場合、その補正は移動局での補
正前のレベルに戻す場合に限らず、例えば補正前のレベ
ルより少し大なる値とし、例えば移動局での加算補正値
αが5dBの場合、基地局での補正を5dBの減算ではな
く、3dBの減算として、チャネル切替えを優先的に行
い、しかも切り替わった時に品質劣化がないようにする
こともできる。Performing correction on the reception level reported from the mobile station as described above can be applied to the case where a plurality of frequency bands are used. In this case, the correction is performed to the level before correction at the mobile station. For example, when the addition correction value α at the mobile station is 5 dB, the correction at the base station is not a subtraction of 5 dB, but is a 3 dB subtraction. Switching can be performed with priority, and quality can be prevented from being degraded when the switching is performed.
【0017】上述において複数の周波数帯を使用する場
合は、二つの周波数帯に限らない。さらに時分割多重方
式に限らず、周波数分割多重方式、符号分割多重方式に
もこの発明は適用でき、その場合は通話チャネル内の送
受信機のみならず、監視チャネル内の送受信機も設け
て、通話中の監視チャネルの受信レベルの測定を可能と
する。When a plurality of frequency bands are used in the above description, the present invention is not limited to two frequency bands. Further, the present invention can be applied not only to the time division multiplexing system but also to the frequency division multiplexing system and the code division multiplexing system. In this case, not only the transceiver in the communication channel but also the transceiver in the monitoring channel is provided, It enables the measurement of the reception level of the inside monitoring channel.
【0018】[0018]
【発明の効果】以上のべたように、この発明によれば通
話チャネルのレベルに応じて優先的にチャネル切替えを
可能としたり、ある無線ゾーンになるべくチャネル切替
えが行えるように、あるいは逆にチャネル切替えが行わ
れないようにすることができる。As described above, according to the present invention, channel switching can be preferentially performed according to the level of a communication channel, or channel switching can be performed in a certain radio zone, or vice versa. Is not performed.
【0019】さらに複数周波数帯にまたがるチャネル切
替えにおいて、移動局にレベル補正を行わせ、回線選択
時に周波数帯の違いによる偏りができないようにし、か
つチャネル切替え時に十分な通話品質を保つことができ
る。また、補正されたレベルを補正前のレベルに戻す際
に、基地局側で値を操作することでトラヒックを制御
し、負荷を分散させることが可能となり、実用上極めて
有用である。Further, in the channel switching over a plurality of frequency bands, the mobile station can perform level correction to prevent bias due to the difference in frequency band when selecting a line, and to maintain sufficient communication quality at the time of channel switching. Further, when returning the corrected level to the level before the correction, it is possible to control the traffic by operating the value on the base station side and disperse the load, which is extremely useful in practical use.
【図1】請求項1の発明の実施例の処理を示す流れ図。Figure 1 is a flow chart of a process embodiment of the invention of claim 1.
【図2】Aは請求項1の発明を適用した移動通信システ
ムの例を示すブロック図、Bは基地局から移動局への周
辺ゾーン監視チャネル通知信号の例を示す図、Cは移動
局から基地局への受信レベル情報の報告例を示す図であ
る。2A is a block diagram showing an example of a mobile communication system to which the invention of claim 1 is applied, FIG. 2B is a diagram showing an example of a peripheral zone monitoring channel notification signal from a base station to a mobile station, and FIG. FIG. 11 is a diagram illustrating an example of reporting reception level information to a base station.
【図3】Aは移動局での監視チャネル受信レベルと補正
状態との例を示す図 、Bはその補正後のレベル順ソー
トを示す図である。FIG. 3A is a diagram showing an example of a monitoring channel reception level and a correction state in a mobile station, and FIG. 3B is a diagram showing a level order sort after the correction.
【図4】通話中の基地局から、周辺基地局への無線回線
問い合わせの様子を示す図。FIG. 4 is a diagram showing a state of a wireless line inquiry from a base station during a call to a peripheral base station.
【図5】二つの周波数帯を用いて移動通信システムの例
を示すブロック図。FIG. 5 is a block diagram showing an example of a mobile communication system using two frequency bands.
【図6】図5におけるチャネル切替え時の周波数帯遷移
を示す図。FIG. 6 is a diagram showing frequency band transition at the time of channel switching in FIG. 5;
───────────────────────────────────────────────────── フロントページの続き (72)発明者 尾上 誠蔵 東京都港区虎ノ門二丁目10番1号 エ ヌ・ティ・ティ移動通信網株式会社内 (56)参考文献 特開 平7−38943(JP,A) 特開 平7−23447(JP,A) 特開 平6−351060(JP,A) 特開 平6−237217(JP,A) (58)調査した分野(Int.Cl.7,DB名) H04B 7/24 - 7/26 102 H04Q 7/00 - 7/38 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Seizo Onoe 2-10-1 Toranomon, Minato-ku, Tokyo Inside NTT Mobile Communication Network Co., Ltd. (56) References JP-A-7-38943 ( JP, A) JP-A-7-23447 (JP, A) JP-A-6-351060 (JP, A) JP-A-6-237217 (JP, A) (58) Fields investigated (Int. Cl. 7 , (DB name) H04B 7/24-7/26 102 H04Q 7/00-7/38
Claims (2)
バーし、各無線ゾーンに基地局をそれぞれ設け、通信中
の基地局から通知された周辺無線ゾーンの監視チャネル
の受信レベルを、通信中に移動局で測定し、その測定受
信レベル情報を通信中の基地局へ報告し、通信中の基地
局は上記報告された受信レベル情報に基づいて適切な周
辺無線ゾーンの基地局を選定し、選定された周辺無線ゾ
ーンの基地局は、上記通信中の基地局から受信した受信
レベル情報に基づいて無線回線の使用可否を判断する移
動通信の無線回線制御方法において、上記通信中の基地局に報告された受信レベル情報は、上
記測定された受信レベルに上記通信中の基地局から受信
した補正値を加算した補正受信レベルとされ、 上記周辺無線ゾーンの基地局が上記通信中の基地局から
受信した受信レベル情報は、上記補正受信レベルから上
記補正値を差し引いた受信レベルとされる ことを特徴と
する移動通信の無線回線制御方法。Claims: 1. A service area is covered by a plurality of wireless zones, a base station is provided in each wireless zone, and communication is performed during communication.
The mobile station measures the reception level of the monitoring channel in the peripheral wireless zone notified from the base station of the mobile station during communication , reports the measured reception level information to the base station in communication,
The station will determine the appropriate frequency based on the reported reception level information.
Select a base station in the local wireless zone, and
The base station of the mobile station receives the signal received from the base station in communication.
In the wireless communication channel control method of determining whether or not a wireless communication channel can be used based on level information, the reception level information reported to the communicating base station may include:
Received from the communicating base station to the measured reception level
The corrected reception level is obtained by adding the corrected correction value, and the base station in the peripheral wireless zone is
The received reception level information is higher than the corrected reception level.
A radio channel control method for mobile communication, wherein the reception level is obtained by subtracting the correction value .
バーし、各無線ゾーンに基地局をそれぞれ設け、通信中
の基地局から通知された周辺無線ゾーンの監視チャネル
の受信レベルを、通信中に移動局で測定し、その測定受
信レベル情報を通信中の基地局へ報告し、通信中の基地
局は上記報告された受信レベル情報に基づいて適切な周
辺無線ゾーンの基地局を選定し、その選定された基地局
に対応する受信レベル情報を送出し、選定された周辺無
線ゾーンの基地局は、上記通信中の基地局から受信した
受信レベル情報に基づいて無線回線の使用可否を判断す
る移動通信の無線回線制御方法において、 上記通信中の基地局に報告された受信レベル情報は、上
記測定された受信レベルとされ、 上記周辺無線ゾーンの基地局が上記通信中の基地局から
受信した受信レベル情報は、上記測定された受信レベル
に補正値が加算されたものとする ことを特徴とする移動
通信の無線回線制御方法。2. The service area is covered by a plurality of wireless zones.
And establish base stations in each wireless zone,
Surveillance channel of peripheral wireless zone notified from base station
The mobile station measures the reception level of the
Report the communication level information to the communicating base station, and
The station will determine the appropriate frequency based on the reported reception level information.
Select a base station in the local wireless zone, and select the selected base station.
Sends out the reception level information corresponding to the
Base station in the line zone received from the communicating base station
Judge whether wireless line can be used based on reception level information
In the mobile communication radio channel control method, the reception level information reported to the communicating base station is
The measured reception level is set, and the base station in the peripheral wireless zone is
The received reception level information is the measured reception level.
And a correction value added to the mobile communication line.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18405993A JP3254649B2 (en) | 1993-07-26 | 1993-07-26 | Wireless communication control method for mobile communication |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18405993A JP3254649B2 (en) | 1993-07-26 | 1993-07-26 | Wireless communication control method for mobile communication |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0787544A JPH0787544A (en) | 1995-03-31 |
JP3254649B2 true JP3254649B2 (en) | 2002-02-12 |
Family
ID=16146660
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18405993A Expired - Fee Related JP3254649B2 (en) | 1993-07-26 | 1993-07-26 | Wireless communication control method for mobile communication |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3254649B2 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100290674B1 (en) * | 1998-08-24 | 2001-07-12 | 윤종용 | Method for selecting cell in multi-band system |
US7039413B2 (en) | 2001-10-24 | 2006-05-02 | Ntt Docomo, Inc. | Mobile station transfer control system, cell transfer control method, mobile station, cell transfer control method at mobile station, cell transfer control program, control apparatus, and allocating method of communication resources |
WO2005004510A1 (en) | 2003-06-30 | 2005-01-13 | Fujitsu Limited | Mobile terminal device, base station device, server device, and radio connection method |
JPWO2006092856A1 (en) * | 2005-03-02 | 2008-08-07 | 富士通株式会社 | Multi-carrier communication method and base station and mobile station used therefor |
JP5348042B2 (en) * | 2010-03-26 | 2013-11-20 | 富士通株式会社 | Multi-carrier communication method, multi-carrier communication system and base station used therefor |
JP5532067B2 (en) * | 2012-03-12 | 2014-06-25 | 富士通株式会社 | Mobile station |
-
1993
- 1993-07-26 JP JP18405993A patent/JP3254649B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH0787544A (en) | 1995-03-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6259915B1 (en) | Multiple hyperband mobile and base stations | |
US7177649B1 (en) | System for load balancing based on class of service for wireless communication networks | |
EP0554293B1 (en) | Improved call set-up and spectrum sharing in radio communication on systems with dynamic channel allocation | |
US6201968B1 (en) | Method combining entries from multiple neighbor cell lists to obtain an updated list for a subscriber device | |
US5345597A (en) | Call set-up in a radio communication system with dynamic channel allocation | |
JP2520530B2 (en) | Microcell communication station, method of radio signal processing in microcell communication station, microcellular communication system, and cellular communication base station | |
EP0948231B1 (en) | Signal strength triggered handoff in wireless communication systems | |
AU720309B2 (en) | Adaptive frequency allocation in a telecommunication system | |
US5454026A (en) | Mobile communication congestion control system | |
US6564058B1 (en) | Cellular radio network | |
WO1996033588A1 (en) | Split neighbor lists for multiple hyperband capable cellular communications systems | |
US5257402A (en) | Method for effecting handoff in a multi-site communication system | |
JP3254649B2 (en) | Wireless communication control method for mobile communication | |
EP1269774B1 (en) | Change of frequency range in a communications system | |
JP3114442B2 (en) | Zone switching control method for mobile communication | |
JP3114444B2 (en) | Peripheral zone monitoring channel notification method | |
CA2318118A1 (en) | System and method of mobile station presence verification in a multiple-hyperband cellular telecommunications network | |
JP2818518B2 (en) | TDMA mobile communication system handover control system | |
JP2980212B2 (en) | Mobile communication wireless cell selection method | |
JPH0723447A (en) | Mobile communication system | |
JP2938542B2 (en) | Mobile communication channel switching control method | |
CA2555598C (en) | Multiple hyperband radiocommunications system | |
AU751477B2 (en) | Multiple hyperbrand radiocommunications system | |
JPH1141655A (en) | Interference system control system for cellular mobile communication | |
AU749653B2 (en) | Multiple Hyperband radiocommunications system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071130 Year of fee payment: 6 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081130 Year of fee payment: 7 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091130 Year of fee payment: 8 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091130 Year of fee payment: 8 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101130 Year of fee payment: 9 |
|
LAPS | Cancellation because of no payment of annual fees |