JPH0758682A - Mobile radio base station - Google Patents
Mobile radio base stationInfo
- Publication number
- JPH0758682A JPH0758682A JP5202310A JP20231093A JPH0758682A JP H0758682 A JPH0758682 A JP H0758682A JP 5202310 A JP5202310 A JP 5202310A JP 20231093 A JP20231093 A JP 20231093A JP H0758682 A JPH0758682 A JP H0758682A
- Authority
- JP
- Japan
- Prior art keywords
- transmission
- burst
- base station
- mobile station
- slots
- 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
- Radio Transmission System (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、時分割多重にて基地
局より移動局に信号伝送を行うデジタル移動通信方式に
おいて、移動局への下り制御バーストの伝送信頼度向上
を図った移動無線基地局に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile radio base station for improving the transmission reliability of downlink control bursts to mobile stations in a digital mobile communication system in which signals are transmitted from base stations to mobile stations by time division multiplexing. Regarding the station.
【０００２】[0002]
【従来の技術】従来の移動通信方式では、基地局から移
動局への下りバーストは固定された一つのアンテナより
送信されていた。下りバーストの伝送信頼度特性を向上
するために、移動局において複数のアンテナを用いた空
間ダイバーシチ受信を行っていた。2. Description of the Related Art In a conventional mobile communication system, a downlink burst from a base station to a mobile station is transmitted from one fixed antenna. In order to improve the transmission reliability of the downlink burst, the mobile station performs spatial diversity reception using multiple antennas.
【０００３】[0003]
【発明が解決しようとする課題】従来においては、下り
バースト伝送信頼度を向上するためには、移動局は受信
ダイバーシチを行うための受信系を複数もたせる必要が
あり、移動局小形化、経済化の障害となっていた。ある
いは、移動局と時分割多重ピンポン伝送を行う基地局で
は、複数のアンテナによって受信ダイバーシチを行い、
実際に受信をすることができたアンテナにて送信を行う
送信ダイバーシチを行っていた。しかし、移動局に対し
て着信を行う場合には事前に移動局よりの制御バースト
の送信がないため送信ダイバーシチは実現されないとい
う問題があった。Conventionally, in order to improve the downlink burst transmission reliability, the mobile station needs to have a plurality of reception systems for performing reception diversity, which makes the mobile station compact and economical. Had been an obstacle. Alternatively, a base station that performs time division multiplex ping-pong transmission with a mobile station performs reception diversity with multiple antennas,
Transmit diversity was performed by transmitting with the antenna that could actually receive. However, when receiving an incoming call to the mobile station, there is a problem that the transmission diversity cannot be realized because the control burst is not transmitted from the mobile station in advance.
【０００４】[0004]
【課題を解決するための手段】請求項１の発明では、同
一内容のバーストをアンテナを変えて複数回送信する手
段が設けられる。請求項２の発明では、移動局からの応
答を監視する手段と、その監視により応答がないことが
検出されるとアンテナを変えて再送する手段とが設けら
れる。According to the invention of claim 1, there is provided means for transmitting a burst of the same content a plurality of times by changing the antenna. According to the second aspect of the present invention, means for monitoring the response from the mobile station and means for changing the antenna and retransmitting when no response is detected by the monitoring are provided.
【０００５】なお、請求項１及び２の各発明の何れにお
いても複数のアンテナは移動通信において空間ダイバー
シチがとれるだけ十分離す、例えば使用波長の１／２程
度とする。In each of the first and second aspects of the present invention, the plurality of antennas are sufficiently separated from each other so that space diversity can be obtained in mobile communication, for example, about 1/2 of the used wavelength.
【０００６】[0006]
【作用】請求項１の発明では、移動局の移動速度がバー
スト送信周期と比較して非常に緩やかな時や、移動局が
停止している時でも、移動局では一つのアンテナで受信
しても基地局の送信ダイバーシチ効果を受けることがで
きる。従って、請求項１，２の何れの発明の基地局によ
っても、移動局をダイバーシチ受信機にすることなく高
信頼度の下りバースト信号伝送が行われるため、移動局
受信機を小形化、経済化することかできる。According to the invention of claim 1, even when the moving speed of the mobile station is very slow compared with the burst transmission cycle, or even when the mobile station is stopped, the mobile station receives with one antenna. Can also receive the transmit diversity effect of the base station. Therefore, the base station according to any one of the first and second aspects of the present invention enables highly reliable downlink burst signal transmission without using the mobile station as a diversity receiver, thus making the mobile station receiver compact and economical. You can do it.
【０００７】[0007]
【実施例】図１に請求項１の発明を第二世代コードレス
電話の制御チャネルに適用したときの移動無線基地局に
おけるバースト送信動作を示す。この実施例では、２本
のアンテナを使用した場合について示してある。第二世
代コードレス電話は無線区間に時分割多重ピンポン伝送
方式を採用しており、無線区間フレームに図１Ａに示す
ように送受信フレーム長が５msであって、８つのスロッ
トからなり、その前半の４つのスロットＴ1 〜Ｔ4 は送
信スロットであり、後半の４つのスロットＲ1 〜Ｒ4 は
受信スロットである。下り制御バーストは図１Ｂに示す
ように複数フレームごとに１つの送信スロットＴ1 が用
いられる。従って下り制御バースト周期は、送受信フレ
ーム長の整数倍の５×ｎmsである。この実施例では、図
１Ｃ，Ｄに示すように情報１，情報２，情報３，・・・
をアンテナ１およびアンテナ１および２よりそれぞれ各
１回ずつ送信する。つまり、各情報ごとにアンテナ１と
２とを切り替えて１回ずつ送信する。従って移動局は、
伝搬路の異なるアンテナ１またはアンテナ２からのバー
ストを受信することができ、移動局移動速度がバースト
送信周期より十分遅い場合には、ダイバーシチ受信と同
程度の伝送信頼度が得られる。1 shows a burst transmission operation in a mobile radio base station when the invention of claim 1 is applied to a control channel of a second generation cordless telephone. In this embodiment, the case where two antennas are used is shown. The second-generation cordless telephone adopts a time division multiplex ping-pong transmission system in the wireless section, and the wireless section frame has a transmission / reception frame length of 5 ms as shown in FIG. 1A and is composed of eight slots. The two slots T1 to T4 are transmission slots, and the latter four slots R1 to R4 are reception slots. In the downlink control burst, one transmission slot T1 is used for every plural frames as shown in FIG. 1B. Therefore, the downlink control burst period is 5 × nms which is an integral multiple of the transmission / reception frame length. In this embodiment, as shown in FIGS. 1C and 1D, information 1, information 2, information 3, ...
Is transmitted once from each of antenna 1 and antennas 1 and 2. That is, the antennas 1 and 2 are switched for each piece of information, and the information is transmitted once. Therefore, the mobile station
It is possible to receive bursts from the antennas 1 or 2 having different propagation paths, and when the mobile station moving speed is sufficiently slower than the burst transmission cycle, transmission reliability similar to that of diversity reception can be obtained.
【０００８】図２に請求項２の発明を第二世代コードレ
ス電話の制御チャネルに適用したときの移動無線基地局
におけるバースト送信動作を示す。この実施例において
も、２本のアンテナを使用した場合について示してあ
る。無線区間フレームは図２Ａに示し、図１Ａと同一で
あり、下り制御バーストは図２Ｂに示すように，ｎフレ
ームごとに送信と受信とに交互に切り替えられる。FIG. 2 shows a burst transmission operation in a mobile radio base station when the invention of claim 2 is applied to a control channel of a second generation cordless telephone. This embodiment also shows the case where two antennas are used. The radio section frame is shown in FIG. 2A and is the same as FIG. 1A, and the downlink control burst is alternately switched between transmission and reception every n frames as shown in FIG. 2B.
【０００９】この実施例では移動無線基地局は、情報
１，２，３，・・・を送信し、図２Ｃに示すように、そ
れに対応する応答を受信監視する。例えば図２Ｃに示す
ように、情報２の応答が非受信の場合、図２Ｄに示すよ
うにそれまではアンテナを１により送信していた所を、
図２Ｅに示すようにアンテナ２へ切り替えて情報２を再
送する。次に情報５の応答が非受信となるまではアンテ
ナ２で下りバーストを送信し、情報５の応答の非受信で
アンテナ２から１に切替えて情報５を再送する。In this embodiment, the mobile radio base station transmits information 1, 2, 3, ... And receives and monitors a response corresponding thereto as shown in FIG. 2C. For example, as shown in FIG. 2C, when the response of the information 2 is non-reception, as shown in FIG.
As shown in FIG. 2E, the information 2 is retransmitted by switching to the antenna 2. Next, the downlink burst is transmitted by the antenna 2 until the response of the information 5 is not received, and the antenna 5 is switched from the antenna 2 to 1 and the information 5 is retransmitted when the response of the information 5 is not received.
【００１０】移動無線基地局は、移動局よりの応答で使
用中のアンテナと移動局間の伝搬路条件を検出すること
ができ、伝搬路条件が劣化したときは移動無線基地局は
アンテナを変えてバーストを再送するため、移動局では
伝搬条件が劣化した場合には伝搬条件の異なるバースト
を再度受信することができ、移動局移動速度がバースト
送信周期より十分遅い場合には、ダイバーシチ受信と同
程度の伝送信頼度が得られる。The mobile radio base station can detect the propagation path condition between the antenna in use and the mobile station based on the response from the mobile station. When the propagation path condition deteriorates, the mobile radio base station changes the antenna. Since the burst is retransmitted by the mobile station, if the propagation condition deteriorates, the mobile station can re-receive a burst with a different propagation condition.If the mobile station moving speed is sufficiently slower than the burst transmission cycle, the same as diversity reception A certain degree of transmission reliability can be obtained.
【００１１】請求項１の発明、請求項２の発明の何れに
おいても移動局からの信号が受信されるようになると、
従来の送信ダイバーシチに切替えてもよい。つまり、移
動局から受信されたアンテナから送信を行うようにして
もよい。請求項１の発明の移動無線基地局装置は、ペジ
ャー等の基地局より移動局に一方向のみ通信を行うシス
テムについても適用が可能である。In any of the inventions of claim 1 and 2, when the signal from the mobile station is received,
You may switch to the conventional transmission diversity. That is, you may make it transmit from the antenna received from the mobile station. The mobile radio base station device according to the invention of claim 1 can be applied to a system in which a base station such as a pager communicates with a mobile station in only one direction.
【００１２】[0012]
【発明の効果】以上説明したように、移動局の移動速度
が基地局よりのバースト送信周期より十分遅い場合に
は、この発明によれば、移動局から事前に信号が受信さ
れなくても送信ダイバーシチ効果を得ることができ、信
号伝送信頼度の向上を図ることができる。As described above, according to the present invention, when the moving speed of the mobile station is sufficiently slower than the burst transmission cycle from the base station, the transmission is performed even if the signal is not received in advance from the mobile station. A diversity effect can be obtained, and signal transmission reliability can be improved.
【図１】請求項１の発明を第二世代コードレス電話に適
用した場合のバースト送信動作を示すタイムチャート。FIG. 1 is a time chart showing a burst transmission operation when the invention of claim 1 is applied to a second-generation cordless telephone.
【図２】請求項２の発明を第二世代コードレス電話に適
用した場合のバースト送信動作を示すタイムチャート。FIG. 2 is a time chart showing a burst transmission operation when the invention of claim 2 is applied to a second-generation cordless telephone.
Claims (2)
制御信号を送信する移動無線基地局において、 複数のアンテナと、 基地局より移動局に伝送する同一の下りバーストを上記
各アンテナを変えて複数回送信する手段とを具備するこ
とを特徴とする移動無線基地局。1. A mobile radio base station in which a base station transmits a control signal to a mobile station by time division multiplexing, wherein a plurality of antennas and the same downlink burst transmitted from the base station to the mobile station are transmitted to the respective antennas. A mobile radio base station comprising:
う移動無線基地局において、 複数のアンテナと、 移動局に伝送する制御信号の下りバーストに対応する応
答の有無を監視する手段と、その監視手段が上りバース
トが受信されないことを検出すると下りバーストを上記
アンテナを順次変えて再度送信する手段を有することを
特徴とする移動無線基地局。2. A mobile radio base station communicating with a mobile station by time division multiple access, comprising: a plurality of antennas; and means for monitoring the presence or absence of a response corresponding to a downlink burst of a control signal transmitted to the mobile station, A mobile radio base station, characterized in that it has means for transmitting the downlink burst again by sequentially changing the antenna when the monitoring means detects that the uplink burst is not received.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5202310A JPH0758682A (en) | 1993-08-16 | 1993-08-16 | Mobile radio base station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5202310A JPH0758682A (en) | 1993-08-16 | 1993-08-16 | Mobile radio base station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0758682A true JPH0758682A (en) | 1995-03-03 |
Family
ID=16455433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5202310A Pending JPH0758682A (en) | 1993-08-16 | 1993-08-16 | Mobile radio base station |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0758682A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000269929A (en) * | 1999-03-19 | 2000-09-29 | Mitsubishi Electric Corp | Mobile communication system |
| JP2008042912A (en) * | 2006-08-01 | 2008-02-21 | Zarlink Semiconductor Ltd | Half-duplex communication system |
| JP2010531090A (en) * | 2007-06-13 | 2010-09-16 | 韓國電子通信研究院 | Multi-path management method, data transmission / reception method and apparatus using multi-path |
| JP2017092911A (en) * | 2015-11-17 | 2017-05-25 | キヤノン株式会社 | Communication device, control method, and program |
-
1993
- 1993-08-16 JP JP5202310A patent/JPH0758682A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000269929A (en) * | 1999-03-19 | 2000-09-29 | Mitsubishi Electric Corp | Mobile communication system |
| JP2008042912A (en) * | 2006-08-01 | 2008-02-21 | Zarlink Semiconductor Ltd | Half-duplex communication system |
| JP2010531090A (en) * | 2007-06-13 | 2010-09-16 | 韓國電子通信研究院 | Multi-path management method, data transmission / reception method and apparatus using multi-path |
| JP2013146102A (en) * | 2007-06-13 | 2013-07-25 | Korea Electronics Telecommun | Multiplex path management method, and data transmission/reception method and apparatus using multiplex path |
| JP2017092911A (en) * | 2015-11-17 | 2017-05-25 | キヤノン株式会社 | Communication device, control method, and program |
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