JP3037190B2 - Radio frequency switching method - Google Patents
Radio frequency switching methodInfo
- Publication number
- JP3037190B2 JP3037190B2 JP9097252A JP9725297A JP3037190B2 JP 3037190 B2 JP3037190 B2 JP 3037190B2 JP 9097252 A JP9097252 A JP 9097252A JP 9725297 A JP9725297 A JP 9725297A JP 3037190 B2 JP3037190 B2 JP 3037190B2
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- base station
- data
- reception
- station
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Mobile Radio Communication Systems (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は無線周波数切替方法
に関し、特に複数の無線局（この局を基地局という）か
ら各基地局毎に異なった無線周波数にて、移動する複数
の無線局（この局を移動局という）に対し、データを伝
送するシステムにおいて、移動局が現在使用している基
地局の周波数からさらに受信状態の良い基地局の周波数
へ切り替える方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio frequency switching method, and more particularly, to a plurality of radio stations (hereinafter referred to as base stations) moving at different radio frequencies for each base station. The present invention relates to a method for switching a frequency of a base station currently used by a mobile station to a frequency of a base station having a better reception condition in a system for transmitting data to a base station.
【０００２】[0002]
【従来の技術】従来、この種の無線周波数切替方法にお
いては、それまで受信していた基地局からの電波の受信
を中止して他の周波数に切り替え、その周波数における
受信状態を試験して、より受信状態の良い基地局の周波
数へ切り替えていた。2. Description of the Related Art Conventionally, in this type of radio frequency switching method, reception of a radio wave from a base station, which has been received until then, is stopped to switch to another frequency, and a reception state at that frequency is tested. The frequency has been switched to the frequency of the base station having a better reception condition.
【０００３】[0003]
【発明が解決しようとする課題】上述した従来の無線周
波数切替方法では、最適周波数を決定するために、それ
まで受信していた基地局からの電波の受信を中止しなけ
ればならないので、他の周波数を受信している間は、そ
れまで受信していた基地局からその周波数でデータが送
られていても、このデータを受信することができないと
いう問題点を有していた。In the conventional radio frequency switching method described above, in order to determine the optimum frequency, the reception of the radio wave from the base station that had been received must be stopped. During reception of a frequency, there is a problem in that even if data is transmitted at that frequency from a base station that has been receiving the data, the data cannot be received.
【０００４】本発明は上述した問題点に鑑みなされたも
ので、それまで使用していた基地局からの自局へのデー
タの受信をのがすことなく、最適な基地局の周波数に切
り替ることができる無線周波数切替方法の提供を目的と
する。[0004] The present invention has been made in view of the above-described problems, and switches to an optimum base station frequency without preventing data from being used by a base station to the own station. It is an object of the present invention to provide a radio frequency switching method capable of performing the above.
【０００５】[0005]
【課題を解決するための手段】 上記目的を達成するた
めに、本発明の無線周波数切替方法では、複数の基地局
から各基地局毎に異なった無線周波数にて、複数の移動
局に対し時間を分割して通信チャネルのデータを無線で
伝送するシステムの無線周波数切替方法において、前記
移動局は、各基地局からのそれぞれ異なった周波数で送
信される次に受信開始するまでの時間情報を含ませた通
信チャネルのデータを受信し、現在使用している周波数
の基地局からの自局へのデータから次に受信開始するま
での時間を認識し、この次に受信開始すべきデータが送
られていない時間帯に受信周波数を他の基地局からの周
波数に切り替え、その切り替えた周波数の受信状態を試
験し、その後現在使用している基地局からのデータを受
信し、前記試験の結果にもとづいた最適な基地局からの
受信周波数へ切り替え、この切り替えた基地局からのデ
ータを受信するようにしてある。Means for Solving the Problems In order to achieve the above object, in the radio frequency switching method of the present invention, a time is transmitted from a plurality of base stations to a plurality of mobile stations at different radio frequencies for each base station. Radio frequency switching method of a system for wirelessly transmitting communication channel data by dividing
The mobile stations transmit at different frequencies from each base station.
Then passing moistened with time information of the receiving start until being Shin
Receives data signal channel, to recognize the time at next reception start until <br/> from the data to its own station from the base station of a frequency currently in use,-out reception start all this following de During the time when data is not being transmitted, the receiving frequency is switched to the frequency from another base station, the reception status of the switched frequency is tested, and then the data from the base station currently used is received.
And Shin, switching to the reception frequency from optimal base station which had convex also on the results of the tests, are to receive data from this switching base station.
【０００６】[0006]
【発明の実施の形態】次に、本発明の一実施例について
図面を参照して説明する。Next, an embodiment of the present invention will be described with reference to the drawings.
【０００７】図１は本発明の一実施例のタイムチャー
ト、図２は本発明を実施したシステム例の概念図であ
る。FIG. 1 is a time chart of an embodiment of the present invention, and FIG. 2 is a conceptual diagram of an example of a system embodying the present invention.
【０００８】これらの図において、Ａ，Ｂ，Ｃはそれぞ
れ基地局であり、各基地局毎に異なった無線周波数ｆ
Ａ，ｆＢ，ｆＣにて複数の移動局６（一つだけ図示）に
対し、時間を分割してデータを無線で伝送する。なお、
伝送するデータを時間軸にていくつかに分割したとき
の、分割されたデータの単位を、以下パケットといい、
時間の単位を、以下スロットという。In these figures, A, B and C denote base stations, respectively, and each base station has a different radio frequency f.
At A, fB, fC, data is wirelessly transmitted to a plurality of mobile stations 6 (only one is shown) by dividing the time. In addition,
When the data to be transmitted is divided into several parts along the time axis, the unit of the divided data is hereinafter referred to as a packet,
A unit of time is hereinafter referred to as a slot.
【０００９】本実施例の各基地局Ａ，Ｂ，Ｃは、次に受
信すべきスロットまでの時間情報をパケットの中に含め
ることにより、移動局６が自局に対するデータを含むパ
ケットを受信したときに、次に受信すべきスロットまで
の時間を移動局６に認識させるようになっている。Each of the base stations A, B, and C of the present embodiment includes the time information up to the next slot to be received in the packet, so that the mobile station 6 receives the packet containing the data for the own station. Sometimes, the mobile station 6 is made to recognize the time until the next slot to be received.
【００１０】そして移動局６は、次に受信すべきスロッ
トまでに、他の周波数に切り替え、その受信状態をあら
かじめ試験して記憶し、周波数切替を行なうときにその
記憶に従って最適な周波数に切り替えるようになってい
る。The mobile station 6 switches to another frequency by the next slot to receive, tests and stores the reception state in advance, and switches the frequency to an optimum frequency according to the storage when switching the frequency. It has become.
【００１１】以下、具体例として、移動局６の受信周波
数が、基地局Ａの周波数から基地局Ｂの周波数に切り替
わる場合について説明する。Hereinafter, a case where the reception frequency of the mobile station 6 is switched from the frequency of the base station A to the frequency of the base station B will be described as a specific example.
【００１２】移動局６は、現在、基地局Ａの周波数ｆＡ
を受けているが、図２に示すように移動方向５に沿い基
地局Ａから遠ざかっているので、他の基地局Ｂ並びに基
地局Ｃからの電波の受信状態を試験し、最適な基地局の
周波数に切り替える必要がある。The mobile station 6 is currently operating at the frequency fA of the base station A.
However, as shown in FIG. 2, since the mobile station is moving away from the base station A along the moving direction 5, the receiving condition of the radio waves from the other base stations B and C is tested, and the optimum base station is identified. Need to switch to frequency.
【００１３】基地局Ａは、図１に示すようにパケットに
おいて移動局６へデータを送っているが、スロット１の
パケットには次に受信すべきスロット３までの時間情報
が含まれている。The base station A sends data to the mobile station 6 in a packet as shown in FIG. 1, but the packet in slot 1 contains time information up to slot 3 to be received next.
【００１４】移動局６は、スロット１のデータを受け、
スロット３までの時間情報を受けとる。そして、スロッ
ト３までの時間すなわちスロット２の間に、先ず基地局
Ｂの周波数ｆＢに切り替えて受信状態を試験し、次いで
基地局Ｃに関しても同様に試験してこれらの試験結果を
記憶する。移動局６は基地局Ｂに向っているので、試験
結果は基地局Ｂからの受信状態の方が良好である。The mobile station 6 receives the data of the slot 1,
Time information up to slot 3 is received. Then, during the time until slot 3, that is, during slot 2, first, the frequency is switched to the frequency fB of the base station B to test the reception state, and then the base station C is similarly tested and the test results are stored. Since the mobile station 6 is directed to the base station B, the test result is better in the reception state from the base station B.
【００１５】移動局６は、その後、次のスロット３を受
信するために受信周波数をｆＡに切り替えてスロット３
を受信した後、前記試験結果にしたがって最適な受信周
波数ｆＢに切り替える。Thereafter, the mobile station 6 switches the receiving frequency to fA to receive the next slot 3, and
Is received, the frequency is switched to the optimal reception frequency fB according to the test result.
【００１６】[0016]
【発明の効果】以上説明したように本発明は、自局あて
のデータが送られていないときに、他の周波数の受信状
態を試験することにより、データの受信をのがすことな
く、最適な周波数に切り替えることができるという効果
がある。As described above, according to the present invention, when data addressed to the own station is not transmitted, the reception state of another frequency is tested, so that the data reception can be performed without loss. There is an effect that the frequency can be switched to a different frequency.
【００１７】また、基地局にて、移動局に送るデータ
に、次にデータを送るまでの時間を示すデータを付加す
ることにより、移動局に、次に自局向けのデータが送ら
れて来るまでの時間（データが送られてない時間帯）を
認識させるようにしているので、周波数切替のために別
個にデータを送信する必要がないという効果もある。Further, the base station adds data indicating the time until the next data is transmitted to the data to be transmitted to the mobile station, so that the data for the own station is transmitted to the mobile station next. Since the time until (the time period during which data is not transmitted) is recognized, there is also an effect that it is not necessary to separately transmit data for frequency switching.
【図１】本発明の一実施例のタイムチャートである。FIG. 1 is a time chart of an embodiment of the present invention.
【図２】本発明を実施したシステム例の概念図である。FIG. 2 is a conceptual diagram of an example of a system embodying the present invention.
１，３ 移動局が受信すべきスロット ２ 受信する必要のないスロット Ａ，Ｂ，Ｃ 基地局 ｆＡ 基地局Ａの周波数 ｆＢ 基地局Ｂの周波数 ｆＣ 基地局Ｃの周波数 ６ 移動局 1, 3 Slots to be received by mobile station 2 Slots not required to be received A, B, C Base station fA Frequency of base station A fB Frequency of base station B fC Frequency of base station C 6 Mobile station
Claims (1)
線周波数にて、複数の移動局に対し時間を分割して通信
チャネルのデータを無線で伝送するシステムの無線周波
数切替方法において、 前記移動局は、各基地局からのそれぞれ異なった周波数
で送信される次に受信開始するまでの時間情報を含ませ
た通信チャネルのデータを受信し、現在使用している周
波数の基地局からの自局へのデータから次に受信開始す
るまでの時間を認識し、この次に受信開始すべきデータ
が送られていない時間帯に受信周波数を他の基地局から
の周波数に切り替え、その切り替えた周波数の受信状態
を試験し、その後現在使用している基地局からのデータ
を受信し、前記試験の結果にもとづいた最適な基地局か
らの受信周波数へ切り替え、この切り替えた基地局から
のデータを受信することを特徴とする無線周波数切替方
法。1. A communication system in which time is divided from a plurality of base stations to a plurality of mobile stations at different radio frequencies for each base station.
Radio frequency for systems that transmit channel data wirelessly
In the number switching method , the mobile station has a different frequency from each base station.
In receiving data of a communication channel moistened with time information in the next reception start until transmitted, to then start receiving the data to the own station from the base station of a frequency currently in use
Recognizing the time in luma, it switches the reception frequency to the time zone where the reception start all-out data is not being transmitted to the next frequency from the other base station, to test the reception state of the switching frequency , Then the data from the base station currently in use
Receiving the switching to the reception frequency from optimal base station to the Some convex result of the test, radio frequency switching method characterized by receiving the data from this switching base station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9097252A JP3037190B2 (en) | 1997-04-15 | 1997-04-15 | Radio frequency switching method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9097252A JP3037190B2 (en) | 1997-04-15 | 1997-04-15 | Radio frequency switching method |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63040700A Division JP2852045B2 (en) | 1988-02-25 | 1988-02-25 | Radio frequency switching method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1032861A JPH1032861A (en) | 1998-02-03 |
| JP3037190B2 true JP3037190B2 (en) | 2000-04-24 |
Family
ID=14187385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9097252A Expired - Lifetime JP3037190B2 (en) | 1997-04-15 | 1997-04-15 | Radio frequency switching method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3037190B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58187033A (en) * | 1982-04-26 | 1983-11-01 | Nippon Telegr & Teleph Corp <Ntt> | Controlling system of mobile communication |
| JPS6192050A (en) * | 1984-10-12 | 1986-05-10 | Nec Corp | Radio selective call receiver realizing efficient battery saving system |
-
1997
- 1997-04-15 JP JP9097252A patent/JP3037190B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1032861A (en) | 1998-02-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |