JPH0528531B2 - - Google Patents

Info

Publication number
JPH0528531B2
JPH0528531B2 JP22569684A JP22569684A JPH0528531B2 JP H0528531 B2 JPH0528531 B2 JP H0528531B2 JP 22569684 A JP22569684 A JP 22569684A JP 22569684 A JP22569684 A JP 22569684A JP H0528531 B2 JPH0528531 B2 JP H0528531B2
Authority
JP
Japan
Prior art keywords
working
transmission
transmission lines
channel
switching
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
Application number
JP22569684A
Other languages
Japanese (ja)
Other versions
JPS61105128A (en
Inventor
Takaaki Ichikawa
Akira Hashimoto
Shozo Komaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTT Inc
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP22569684A priority Critical patent/JPS61105128A/en
Publication of JPS61105128A publication Critical patent/JPS61105128A/en
Publication of JPH0528531B2 publication Critical patent/JPH0528531B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/74—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for increasing reliability, e.g. using redundant or spare channels or apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は直交する偏波を共用する無線伝送方式
において、救済効果の高い伝送路切替方法を実現
する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for realizing a transmission line switching method with high rescue effect in a wireless transmission system that shares orthogonal polarized waves.

（従来の技術） 一般の無線伝送路においては、伝送路障害救済
のため第３図のように構成された回線切替装置を
用いている。図において、１1〜１ｎは入力信号
端子、２1〜２ｎおよび４1〜４ｎは切替器、３0
〜３ｎは回線品質監視回路、５1〜５ｎは出力信
号端子であり、現用伝送路ｎ本に対し１本の予備
伝送路が設けられており、現用伝送路障害時には
予備伝送路に切変えることにより障害の救済を行
つている。無線回路の場合は、特定の周波数に選
択的に異常伝搬状態が発生し、これを周波数選択
性フエージングと読んでいる。この選択性フエー
ジングによる伝送路障害は一般に、特定の周波数
のみに発生するため、周波数の異なる伝送路を用
いる無線伝送方式では上記の切替装置の効果が高
い。(Prior Art) In general wireless transmission paths, a line switching device configured as shown in FIG. 3 is used to relieve transmission path failures. In the figure, 1 1 to 1n are input signal terminals, 2 1 to 2n and 4 1 to 4n are switchers, and 3 0
-3n is a line quality monitoring circuit, and 51 to 5n are output signal terminals.One backup transmission line is provided for every n working transmission lines, and the line can be switched to the backup transmission line in the event of a failure in the working transmission line. We are providing relief for people with disabilities. In the case of radio circuits, abnormal propagation conditions occur selectively at specific frequencies, and this is called frequency-selective fading. Since transmission path failures due to selective fading generally occur only at specific frequencies, the above-mentioned switching device is highly effective in wireless transmission systems that use transmission paths with different frequencies.

伝送路切替による選択性フエージング救済の効
果は、各伝送路がどのような無線周波数に割当て
られているかによつて効果が異なる。例えば、第
４図は従来から多く用いられてきた周波数配置で
あり、直交する偏波（例えばＶ偏波、Ｈ偏波）を
交互に使用するインターリーブー配置をとつてい
る。この場合は、いずれか１つの周波数に選択性
フエージングが発生しても、障害となる現用伝送
路は１つであり、予備伝送路に切替えることが可
能であり救済効果が高かつた。 The effect of selective fading relief through transmission path switching differs depending on what radio frequency each transmission path is assigned to. For example, FIG. 4 shows a frequency arrangement that has been widely used in the past, and has an interleaved arrangement in which orthogonal polarized waves (for example, V polarized waves and H polarized waves) are alternately used. In this case, even if selective fading occurs in any one frequency, there is only one active transmission line that becomes a failure, and it is possible to switch to the protection transmission line, which provides a high relief effect.

一方、近年周波数を有効に利用することならび
に直交偏波間の干渉を軽減する装置の開発等によ
り、第５図のような周波数配置を使用することが
検討され始めている。図の配置は同一周波数の直
交する偏波を同時に異なつた伝送路として使用す
る方法でありコチヤンネル配置と呼ばれる。 On the other hand, in recent years, due to the effective use of frequencies and the development of devices for reducing interference between orthogonal polarized waves, consideration has begun to be given to using a frequency arrangement as shown in FIG. The arrangement shown in the figure is a method of using orthogonal polarized waves of the same frequency as different transmission paths at the same time, and is called a cochannel arrangement.

（発明が解決しようとする問題点） この第５図の配置を用いた場合、いずれか１つ
の周波数に選択性フエージングが生じると、直交
する偏波に収容した２つの伝送路が同等に障害と
なり、予備伝送路へ切替て救済できなくなり、効
果は低減する。(Problem to be solved by the invention) When using the arrangement shown in Fig. 5, if selective fading occurs in any one frequency, two transmission lines accommodated in orthogonal polarization will be equally impaired. Therefore, it is no longer possible to switch to the backup transmission line for relief, and the effectiveness is reduced.

本発明は従来の技術の上記欠点を改善すること
を目的とする。 The present invention aims to improve the above-mentioned drawbacks of the prior art.

（問題点を解決するための手段） 本発明の特徴は異なつた周波数または偏波を用
いて複数の現用伝送路及び当該現用伝送路よりも
少ない数の予備伝送路を構成し、かつ現用伝送路
の障害時に予備伝送路に切替えて障害を救済する
無線方式において、各伝送路が周波数を細分化し
たチヤンネルに細分化され、各伝送路は同一周波
数の異なる偏波を使用する２つを単位とする伝送
路に収容され、障害伝送路を予備伝送路に切替え
る無線通信方式にある。(Means for Solving the Problems) The present invention is characterized by configuring a plurality of working transmission lines and a smaller number of protection transmission lines than the working transmission lines using different frequencies or polarizations, and In this wireless system, each transmission path is subdivided into channels with subdivided frequencies, and each transmission path consists of two channels using the same frequency but different polarizations. This is a wireless communication system that switches a faulty transmission line to a backup transmission line.

（作用） 上記構成により現用回線が同時に２回線障害と
なつても、単一の予備回線の２つのチヤネルに切
替えることができる。(Function) With the above configuration, even if two working lines fail at the same time, it is possible to switch to two channels of a single protection line.

（実施例） 第１図は本発明を示す周波数配置の例であり、
〜は現用の伝送路をしめしている。また１〜
４はそれぞれの伝送路をさらに周波数を細分化し
て使用しているチヤンネルを示す信号であり、予
備伝送路の１〜４に対応したチヤンネルに切替ら
れるものとする。(Example) FIG. 1 is an example of frequency allocation showing the present invention,
~ indicates the current transmission line. Also 1~
4 is a signal indicating a channel in which each transmission path is further subdivided in frequency and is used, and is assumed to be switched to a channel corresponding to backup transmission paths 1 to 4.

このように構成すれば、選択性フエージングが
発生した場合においても同時に伝送路障害となる
チヤンネル番号１〜４のいづれか１つであり（例
えば伝送路のチヤンネル１が障害となつた場合
は、伝送路のチヤンネル４のみが同時障害とな
り、伝送路のチヤンネル２〜３、伝送路のチ
ヤンネ１〜３およびその他の伝送路については障
害とはならない。）、予備伝送路の対応する予備チ
ヤンネルへおよび４に切替えて救済することが可
能である。 With this configuration, even if selective fading occurs, any one of channel numbers 1 to 4 will fail at the same time (for example, if channel 1 of the transmission line becomes a failure, the transmission (Only channel 4 of the transmission line is simultaneously failed, and there is no failure for channels 2 to 3 of the transmission line, channels 1 to 3 of the transmission line, and other transmission lines.), to the corresponding protection channel of the protection transmission line, and 4. It is possible to recover by switching to

以上に述べたように現用伝送路を細分化し、細
分化したチヤンネルに対してそれぞれ異なつた予
備を設け、さらに同一周波数の直交偏波に対して
は、予備伝送路内の異なつた周波数のチヤンネル
に切り替えることにより、予備伝送路への救済効
果を高めることが可能となる。 As mentioned above, the working transmission line is subdivided, and different backup channels are provided for each subdivided channel.Furthermore, for orthogonal polarization of the same frequency, channels of different frequencies within the backup transmission line are provided. By switching, it becomes possible to enhance the relief effect on the backup transmission line.

第２図はこれを実現するための回路構成を示す
ものであり、１1〜１ｎは信号入力５1〜５ｎ信号
出力端子、６1〜６ｎは伝送路を細分化する装
置；デイジタル信号の場合は直列−並列変換回
路、７1〜７ｎはその逆の操作すなわち細分化さ
れた信号を元の伝送路信号に束ねる回路、１２1
〜１２ｎ…ｍ２1，ｍ２ｎおよび１４1〜１４ｎ…
ｍ４1〜ｍ４ｎは切替器である。これの動作とし
ては入力信号を６1〜６ｎにより分割し、細分化
したそれぞれのチヤネルに対し細分化された予備
チヤネルを設け、一つの切替単位に属する信号が
同一周波数の異偏波とならないように配置し一つ
の切替単位において２つの信号が同時に障害とな
らないようにすることにより上記の効果を得るこ
とができる。以上の説明においては、予備伝送路
が一本であるような場合について述べたが、予備
伝送器が二本以上ある場合についても同一周波数
の異なつた偏波に収容される２つの伝送路が異な
つた予備を有するようにすれば救済効果が高まる
ことは容易に分かる。 Figure 2 shows the circuit configuration to realize this, where 1 1 to 1n are signal input terminals 5 1 to 5n signal output terminals, and 6 1 to 6n are devices for subdividing the transmission path; in the case of digital signals. 12 1 is a serial-to-parallel conversion circuit; 7 1 to 7 n are circuits that perform the opposite operation, that is, bundle the subdivided signals into the original transmission line signal; 12 1
〜12n...m2 1 , m2n and 14 1 〜14n...
m4 1 to m4n are switching devices. The operation of this is to divide the input signal into 61 to 6n, and provide subdivided spare channels for each subdivided channel, so that signals belonging to one switching unit do not have different polarizations of the same frequency. The above effect can be obtained by arranging the two signals in one switching unit so that they do not interfere at the same time. In the above explanation, we have discussed the case where there is one backup transmission line, but even when there are two or more backup transmitters, the two transmission lines accommodated by different polarizations of the same frequency may be different. It is easy to see that the relief effect will be enhanced by having a reserve of ivy.

（発明の効果） 以上説明したように、同一周波数の直交する偏
波に対して異なつた予備を有する信号を割り当て
ることにより選択性フエージングに対する救済効
果が高くなるため、伝送路の安定性ならびに品質
が向上する。また、品質を一定にする場合は無線
中断装置を簡単にすることが可能となる。(Effects of the Invention) As explained above, by allocating signals with different reserves to orthogonal polarizations of the same frequency, the relief effect against selective fading is enhanced, which improves the stability and quality of the transmission path. will improve. Furthermore, if the quality is constant, the wireless interruption device can be simplified.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明を用いた場合の無線周波数の使
用例を示す図、第２図は本発明の構成の一実施例
を示す図、第３図は無線回路回線で使用される伝
送路切替装置の構成を示す図、第４図および第５
図は従来の無線周波数配置を示す図である。 ６1〜６ｎ；信号細分化装置、１２1〜１２ｎ−
ｍ４1〜ｍ４ｎ；切替器。 Fig. 1 is a diagram showing an example of how radio frequencies are used when using the present invention, Fig. 2 is a diagram showing an example of the configuration of the present invention, and Fig. 3 is a diagram showing a transmission path switching used in a radio circuit line. Figures 4 and 5 showing the configuration of the device
The figure is a diagram showing a conventional radio frequency arrangement. 6 1 to 6n; signal segmentation device, 12 1 to 12n-
m4 1 to m4n; switching device.

Claims (1)

【特許請求の範囲】 １ 同一周波数の互いに直交する偏波を用い、互
いに独立した伝送路を有すると共に、現用伝送路
の数よりも少ない数の予備伝送路を有し、前記現
用伝送路の障害時に前記予備伝送路に切り替えて
障害を救済する無線方式において、 前記現用および予備伝送路は、複数の周波数帯
に分割された複数のチヤンネルで構成され、 前記分割された一つのチヤンネルを切り替え単
位として現用チヤンネルを予備チヤンネルに切り
替えると共に、 障害を生じた複数の現用チヤンネルのうち、周
波数の同一のものについては、予備伝送路内の別
のチヤンネルに各々切り替える ことを特徴とする無線通信方式。[Scope of Claims] 1. A system that uses mutually orthogonal polarized waves of the same frequency, has mutually independent transmission lines, and has a smaller number of protection transmission lines than the number of working transmission lines, and prevents interference with the working transmission lines. In a wireless system that sometimes switches to the backup transmission line to relieve a failure, the working and backup transmission lines are composed of a plurality of channels divided into a plurality of frequency bands, and one divided channel is used as a switching unit. A wireless communication system characterized by switching a working channel to a protection channel, and switching each of a plurality of faulty working channels with the same frequency to another channel in the protection transmission path.
JP22569684A 1984-10-29 1984-10-29 Radio communication system Granted JPS61105128A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22569684A JPS61105128A (en) 1984-10-29 1984-10-29 Radio communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22569684A JPS61105128A (en) 1984-10-29 1984-10-29 Radio communication system

Publications (2)

Publication Number Publication Date
JPS61105128A JPS61105128A (en) 1986-05-23
JPH0528531B2 true JPH0528531B2 (en) 1993-04-26

Family

ID=16833358

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22569684A Granted JPS61105128A (en) 1984-10-29 1984-10-29 Radio communication system

Country Status (1)

Country Link
JP (1) JPS61105128A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12490123B2 (en) 2021-02-01 2025-12-02 Ntt, Inc. Wireless communication system, wireless communication method, and transmitter

Also Published As

Publication number Publication date
JPS61105128A (en) 1986-05-23

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