JP2004140740A - Channel control system for radio system - Google Patents

Channel control system for radio system Download PDF

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Publication number
JP2004140740A
JP2004140740A JP2002305616A JP2002305616A JP2004140740A JP 2004140740 A JP2004140740 A JP 2004140740A JP 2002305616 A JP2002305616 A JP 2002305616A JP 2002305616 A JP2002305616 A JP 2002305616A JP 2004140740 A JP2004140740 A JP 2004140740A
Authority
JP
Japan
Prior art keywords
station
base station
call setting
control
radio
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
Application number
JP2002305616A
Other languages
Japanese (ja)
Inventor
Toshiyasu Kizawa
鬼澤 利康
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.)
Hitachi Kokusai Electric Inc
Original Assignee
Hitachi Kokusai Electric Inc
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 Hitachi Kokusai Electric Inc filed Critical Hitachi Kokusai Electric Inc
Priority to JP2002305616A priority Critical patent/JP2004140740A/en
Publication of JP2004140740A publication Critical patent/JP2004140740A/en
Pending legal-status Critical Current

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  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To effectively utilize a radio channel by allowing the modulation systems (for example, the 16QAM system and the π/4 shift QPS system) for use to be switched in accordance with the destination of communication (a mobile station or a fixed station). <P>SOLUTION: The radio equipment of a terminal station (a mobile station or a fixed station) superposes the terminal station information indicating which of a mobile station or a fixed station the terminal station itself is, on a call setting signal when transmitting the call setting signal to an administrative station controller through the radio equipment of a base station, and the administrative station controller superposes the modulation system information of the destination terminal station, which is obtained from the terminal station information, on a call setting acceptance signal when transmitting the call setting acceptance signal to the terminal station through the radio equipment of the base station. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、無線システムの回線制御方式に関するものである。
【0002】
【従来の技術】
無線システムの構成を示すブロック図を図1に示す。1は基地局・統制局、2−n(n=1,2,…)は複数の移動局、3−n(n=1,2,…)は複数の固定局、4は基地局無線装置、5は統制局制御装置、6は基地局・統制局の電話機、7−n(n=1,2,…)は複数の移動局無線装置、8−n(n=1,2,…)は複数の移動局・固定局の電話機、9は無線回線で、無線システムを構成している。
【0003】
移動局又は固定局から基地局・統制局へ通信を行った場合のシーケンス図を図3に示す。
【0004】
最初に、移動局無線装置7−nは基地局無線装置4へ「呼設定」信号を送信して通信を要求する。次に、基地局無線装置4は統制局制御装置5へ「呼設定」信号を送信して通信を要求する。次に、基地局無線装置4は移動局無線装置7−nへ「呼設定受付」信号を送信して通信の受け付けを応答する。次に、統制局制御装置5は基地局無線装置4へ「呼設定受付」信号を送信して通信の受け付けを応答する。次に、基地局無線装置4は統制局制御装置5へ「無線チャネル通知」信号を送信して通信のスロットを応答する。最後に、基地局無線装置4は移動局無線装置7−nへ「無線チャネル指定」信号を送信してスロットを応答する。
【0005】
【発明が解決しようとする課題】
前述の従来技術には、通信の相手(移動局か固定局か)によって使用する回線の変調方式(例えば、16QAM方式、π/4シフトQPSK方式)を指定する機能がないため、無線回線の有効利用を図ることができないという欠点があった。この欠点は、例えば、固定局同士が通信する場合、16QAM方式の方がπ/4シフトQPSK方式よりも多重化できるにもかかわらず、回線の変調方式を指定する機能がないため、π/4シフトQPSK方式を選択したときに発生する。
【0006】
本発明は、これらの欠点を除去し、通信の相手によって使用する変調方式を切り替えることを目的とする。
【0007】
【課題を解決するための手段】
本発明は、上記の目的を達成するために、統制局制御装置から基地局無線装置へ、通信の相手によって無線回線の変調方式を指定することを可能としたものである。
【0008】
その結果、無線回線の有効利用を図ることを可能としたものである。
【0009】
【発明の実施の形態】
以下、この発明の一実施例を説明する。
【0010】
無線システムの構成を示すブロック図は、従来の技術と同様である。
移動局から基地局・統制局へ通信を行った場合のシーケンス図を図2に示す。
【0011】
最初に、移動局無線装置7−nは基地局無線装置4へ「呼設定」信号を送信して通信を要求する。(「呼設定」信号には移動局か固定局かを示す端末局情報が重畳される。)次に、基地局無線装置4は統制局制御装置5へ「呼設定」信号を送信して通信を要求する。次に、基地局無線装置4は移動局無線装置7−nへ「呼設定受付」信号を送信して通信の受け付けを応答する。次に、統制局制御装置5は「呼設定」信号に重畳された端末局情報より移動局無線装置7−nが移動局か固定局か判定する。次に、統制局制御装置5は基地局無線装置4へ「変調方式」情報を含む「呼設定受付(変調方式)」信号を送信して通信の受け付けと変調方式を応答する。(固定局の場合、伝送品質の変化に弱いものの伝送量の多い16QAM方式の変調方式にする。一方、移動局の場合、伝送量が少ないものの伝送品質の変化に強いπ/4シフトQPSK方式の変調方式にする。)次に、基地局無線装置4は統制局制御装置5へ「無線チャネル通知」信号を送信して通信のスロットを応答する。最後に、基地局無線装置4は移動局無線装置7−nへ「変調方式」情報を含む「無線チャネル指定(変調方式)」信号を送信してスロットと変調方式を応答する。
【0012】
【発明の効果】
本発明によれば、通信の相手によって使用する変調方式を切り替えるため、無線回線の有効利用を図ることができる。
【図面の簡単な説明】
【図1】無線システムの構成を示すブロック図。
【図2】従来の一例である回線制御方式を示すシーケンス図。
【図3】本発明の一実施例である回線制御方式を示すシーケンス図。
【符号の説明】
1:基地局・統制局
2−n:複数の移動局
3−n:複数の固定局
4:基地局無線装置
5:統制局制御装置
6:基地局・統制局の電話機
7−n:複数の移動局無線装置、固定局無線装置
8−n:複数の移動局、固定局の電話機
9:無線回線
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a line control method for a wireless system.
[0002]
[Prior art]
FIG. 1 is a block diagram illustrating a configuration of a wireless system. 1 is a base station / control station, 2-n (n = 1, 2,...) Is a plurality of mobile stations, 3-n (n = 1, 2,...) Is a plurality of fixed stations, and 4 is a base station radio apparatus. 5, a control station control device, 6 a base station / control station telephone, 7-n (n = 1, 2,...) A plurality of mobile station radio devices, 8-n (n = 1, 2,...) Is a plurality of mobile station / fixed station telephones, and 9 is a wireless line, which constitutes a wireless system.
[0003]
FIG. 3 shows a sequence diagram when communication is performed from the mobile station or the fixed station to the base station / control station.
[0004]
First, the mobile station radio 7-n transmits a "call setting" signal to the base station radio 4 to request communication. Next, the base station wireless device 4 transmits a “call setting” signal to the control station control device 5 to request communication. Next, the base station radio apparatus 4 transmits a "call setting reception" signal to the mobile station radio apparatus 7-n to respond to the reception of the communication. Next, the control station control device 5 transmits a “call setting reception” signal to the base station radio device 4 to respond to the reception of the communication. Next, the base station radio apparatus 4 transmits a “radio channel notification” signal to the control station control apparatus 5 and responds with a communication slot. Finally, the base station radio apparatus 4 transmits a "radio channel designation" signal to the mobile station radio apparatus 7-n to respond to the slot.
[0005]
[Problems to be solved by the invention]
The above-mentioned prior art does not have a function of designating a modulation method (for example, 16QAM method, π / 4 shift QPSK method) of a line to be used depending on a communication partner (mobile station or fixed station). There was a drawback that it could not be used. This disadvantage is, for example, when fixed stations communicate with each other, although there is no function to specify the modulation method of the line, although the 16QAM system can perform multiplexing more than the π / 4 shift QPSK system, Occurs when the shift QPSK method is selected.
[0006]
An object of the present invention is to eliminate these drawbacks and switch the modulation scheme to be used depending on the communication partner.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention makes it possible to specify a modulation method of a radio channel from a control station control device to a base station radio device by a communication partner.
[0008]
As a result, it is possible to effectively use the wireless line.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described.
[0010]
The block diagram showing the configuration of the wireless system is similar to that of the related art.
FIG. 2 shows a sequence diagram when communication is performed from the mobile station to the base station / control station.
[0011]
First, the mobile station radio 7-n transmits a "call setting" signal to the base station radio 4 to request communication. (Terminal station information indicating whether the mobile station or the fixed station is superimposed on the "call setting" signal.) Next, the base station radio apparatus 4 transmits a "call setting" signal to the control station control apparatus 5 to perform communication. Request. Next, the base station radio apparatus 4 transmits a "call setting reception" signal to the mobile station radio apparatus 7-n to respond to the reception of the communication. Next, the control station control device 5 determines whether the mobile station radio device 7-n is a mobile station or a fixed station based on the terminal station information superimposed on the "call setting" signal. Next, the control station control device 5 transmits a “call setting acceptance (modulation method)” signal including “modulation method” information to the base station wireless device 4 to accept communication and respond with the modulation method. (In the case of a fixed station, the modulation scheme of the 16QAM scheme is used, which is weak against a change in transmission quality but has a large transmission amount. Next, the base station radio apparatus 4 transmits a "radio channel notification" signal to the control station control apparatus 5 to respond to the communication slot. Finally, the base station radio apparatus 4 transmits a "radio channel designation (modulation scheme)" signal including "modulation scheme" information to the mobile station radio apparatus 7-n, and responds with the slot and the modulation scheme.
[0012]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, since the modulation system to be used is switched depending on the communication partner, it is possible to effectively use the wireless line.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a wireless system.
FIG. 2 is a sequence diagram showing a conventional line control method.
FIG. 3 is a sequence diagram showing a line control method according to an embodiment of the present invention.
[Explanation of symbols]
1: base station / control station 2-n: plural mobile stations 3-n: plural fixed stations 4: base station radio apparatus 5: control station control apparatus 6: base station / control station telephone 7-n: plural stations Mobile station radio equipment, fixed station radio equipment 8-n: Multiple mobile stations, fixed station telephones 9: Radio line

Claims (1)

基地局と複数の移動局・固定局をデジタル変調方式の複数の無線回線で接続するマルチチャネルアクセス方式の無線システムで、制御回線を含む無線回線の変調方式を多重数が少ないが移動回線に適した変調方式(π/4シフトQPSK)とし、制御回線を含まない無線回線の変調方式を前述の変調方式(π/4シフトQPSK)及び多重数が大きいが移動回線に適さない変調方式(16QAM)とし、基地局の通信の相手によって変調方式を切り替えることにより、無線回線の有効利用を図ることを特徴とした、無線システムの回線制御方式。A multi-channel access wireless system that connects a base station and multiple mobile stations and fixed stations with multiple digital modulation wireless links. The modulation scheme for wireless links including the control link is small, but suitable for mobile links. The modulation method of the radio channel not including the control line is the modulation method described above (π / 4 shift QPSK) and the modulation method having a large number of multiplexes but not suitable for the mobile line (16 QAM). A line control method for a wireless system, characterized in that a modulation method is switched according to a communication partner of a base station to thereby effectively use a wireless line.
JP2002305616A 2002-10-21 2002-10-21 Channel control system for radio system Pending JP2004140740A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002305616A JP2004140740A (en) 2002-10-21 2002-10-21 Channel control system for radio system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002305616A JP2004140740A (en) 2002-10-21 2002-10-21 Channel control system for radio system

Publications (1)

Publication Number Publication Date
JP2004140740A true JP2004140740A (en) 2004-05-13

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JP2002305616A Pending JP2004140740A (en) 2002-10-21 2002-10-21 Channel control system for radio system

Country Status (1)

Country Link
JP (1) JP2004140740A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007083584A1 (en) * 2006-01-17 2007-07-26 Ntt Docomo, Inc. Radio communication device and retransmission packet transmission method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007083584A1 (en) * 2006-01-17 2007-07-26 Ntt Docomo, Inc. Radio communication device and retransmission packet transmission method
US8522100B2 (en) 2006-01-17 2013-08-27 Ntt Docomo, Inc. Radio communication apparatus and a method of transmitting a retransmission packet
US9112696B2 (en) 2006-01-17 2015-08-18 Ntt Docomo, Inc. Radio communication apparatus and a method of transmitting a retransmission packet

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