JP2010239407A - Radio communication system, base station, and radio communication method - Google Patents

Radio communication system, base station, and radio communication method Download PDF

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JP2010239407A
JP2010239407A JP2009085477A JP2009085477A JP2010239407A JP 2010239407 A JP2010239407 A JP 2010239407A JP 2009085477 A JP2009085477 A JP 2009085477A JP 2009085477 A JP2009085477 A JP 2009085477A JP 2010239407 A JP2010239407 A JP 2010239407A
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base station
base stations
communication system
wireless communication
radio communication
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JP5408705B2 (en
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Hideo Oki
英生 大木
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NEC Platforms Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract

<P>PROBLEM TO BE SOLVED: To simplify station installation design of a base station, and to improve the frequency utilization efficiency. <P>SOLUTION: In a radio communication method of a radio communication system, where a first base station CS4 and second base stations CS2, CS3 for traffic countermeasures are arranged within a single area, electric field intensity values are mutually measured in starting the radio communication system between the first and second base stations installed in the one area; and a main device ME connected to the first and second base stations analyzes the measured information to lower the area information and transmission power of the second base stations. The radio communication system is, for instance, a digital cordless system. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、無線通信システム、基地局及び無線通信方法に係わり、特にデジタルコードレスシステムに好適に用いられる無線通信システム及び無線通信方法に関する。   The present invention relates to a radio communication system, a base station, and a radio communication method, and more particularly to a radio communication system and a radio communication method that are preferably used in a digital cordless system.

図６に示すように、無線通信システムは、基地局CS1〜CS4の各エリア情報は固定（広範囲）で、トラフィックの多い場所に基地局CS4の他に基地局CS2,CS3を増設してそのまま運用する。図６では事務所に端末PS2〜PS6が集まっている場合を示している。代表外線に着信が入ると主装置ＭＥ、基地局CS1〜CS4を介して各無線端末PS1〜PS7へ一斉に着呼要求がかかるが、実際に周波数を使用すると同一エリア内で同じ周波数f1(MHz)を使用してしまう場合があり、着信に失敗する現象が発生する。   As shown in FIG. 6, in the wireless communication system, each area information of the base stations CS1 to CS4 is fixed (wide range), and the base stations CS2 and CS3 are additionally installed in addition to the base station CS4 in a place where traffic is high. To do. FIG. 6 shows a case where terminals PS2 to PS6 are gathered in the office. When an incoming call arrives on a representative outside line, incoming requests are made simultaneously to the wireless terminals PS1 to PS7 via the main apparatus ME and base stations CS1 to CS4. However, if the frequency is actually used, the same frequency f1 (MHz ) May be used, resulting in a failure to receive calls.

基地局CS1〜CS4は複数の無線端末PS1〜PS7を一斉に鳴動させるため、各基地局はほぼ同時に着信要求を送出する。無線端末PS1〜PS7のそれぞれで着信応答を基地局に返信した順番にキャリアセンス（キャリアセンスについては本発明の実施形態において説明する）を実施して通話に使用する周波数を決定するが、同時にキャリアセンスを実施するため、複数の基地局から複数の無線端末へ同じ周波数を割当ててしまう可能性が生じる。   Since the base stations CS1 to CS4 ring the plurality of wireless terminals PS1 to PS7 all at once, each base station sends an incoming request almost simultaneously. In each of the wireless terminals PS1 to PS7, the carrier sense (carrier sense will be described in the embodiment of the present invention) is performed in the order in which the incoming call response is returned to the base station, and the frequency used for the call is determined. Since the sensing is performed, there is a possibility that the same frequency is allocated from a plurality of base stations to a plurality of wireless terminals.

図６では、基地局CS1から無線端末PS7へ周波数f1(MHz)を割り当て、基地局CS2から無線端末PS6へ同じ周波数f1(MHz)を割り当て、基地局CS3から無線端末PS1へ同じ周波数f1(MHz)を割り当てた場合を示している。基地局CS1と基地局CS2,CS3とは距離が離れているため着信をかけた場合に同じ周波数を割り当てる場合がある。そして、基地局CS2と基地局CS3とは距離は近いが同時に個別着信をかけた場合に同じ周波数を割り当てる場合がある。   In FIG. 6, the frequency f1 (MHz) is assigned from the base station CS1 to the radio terminal PS7, the same frequency f1 (MHz) is assigned from the base station CS2 to the radio terminal PS6, and the same frequency f1 (MHz) is assigned from the base station CS3 to the radio terminal PS1. ) Is assigned. Since the base station CS1 and the base stations CS2 and CS3 are separated from each other, the same frequency may be assigned when an incoming call is made. The base station CS2 and the base station CS3 are close to each other, but the same frequency may be assigned when individual incoming calls are made simultaneously.

着信中は通話中の状態と異なり、ハンドオーバやチャネル切り替え等の干渉回避の仕組みが無く、着信に失敗すると着信中に突然着信音が停止するような現象となる。   Unlike a busy state during an incoming call, there is no mechanism for avoiding interference such as handover and channel switching, and if the incoming call fails, the ringing tone suddenly stops during the incoming call.

また着信に失敗して再度着信をかける場合でも鳴動端末の台数によって、狭いエリアで多数の周波数を使用してお互い送信ＩＭ（Inter-Modulation）を発生させ空き周波数が少なくなってしまう現象も発生する。狭いエリア内で複数の周波数を使用するとお互い干渉を起こし、未使用の周波数にスプリアスとして表れ、キャリアセンスレベルに到達すると基地局が着信時に割当てる周波数が無いと判定してしまう場合がある。この場合、着信鳴動は動作せず、鳴動がかかるまで時間がかかることになる。   In addition, even if the incoming call fails and the incoming call is made again, depending on the number of ringing terminals, there may occur a phenomenon in which a number of frequencies are used in a small area and mutual IMs (Inter-Modulation) are generated, resulting in a decrease in free frequencies. . If a plurality of frequencies are used in a narrow area, they may interfere with each other, appear as spurious in unused frequencies, and when the carrier sense level is reached, it may be determined that there is no frequency that the base station assigns when receiving. In this case, the incoming ringing does not work, and it takes time until the ringing starts.

上記の現象を回避するために、特定の基地局のエリア情報を調整してエリアを絞ったり、送信電力を低減させて送信ＩＭを低減させたりすることが可能だが、個別の調整が求められノウハウを必要とする。   In order to avoid the above phenomenon, it is possible to narrow down the area by adjusting the area information of a specific base station, or to reduce the transmission IM by reducing the transmission power. Need.

無線通信システムは狭いエリア内で同時に複数の無線端末を鳴動させる場合は次の設定を手動で実施する。   In a wireless communication system, when a plurality of wireless terminals are simultaneously ringed in a narrow area, the following setting is manually performed.

１） トラフィックに適した基地局の増設
２） 各基地局のエリア情報の変更
３） 各基地局の送信電力の低減
本発明に関連する技術を開示するものとして、特許文献１には、ＰＨＳ通信システムにおいて、各基地局が他の基地局から放出されて捕捉された電波の強度を測定し、ＰＨＳ交換装置あるいは保守端末は各基地局が捕捉した電波の電界強度が大きい順に電界強度テーブルを作成し、各基地局の起動順序を自動的に決定することの記載がある。 1) Expansion of base stations suitable for traffic 2) Change of area information of each base station 3) Reduction of transmission power of each base station Patent Document 1 discloses PHS communication as a technique related to the present invention. In the system, each base station measures the strength of radio waves emitted and captured from other base stations, and the PHS switching device or maintenance terminal creates a field strength table in descending order of the field strength of the radio waves captured by each base station. However, there is a description that the starting order of each base station is automatically determined.

特許文献２には、各基地局の無線送信電力を変化させる条件とその設定値を無線制御局に設定し、条件が満たされた場合に、基地局の無線送信電力を変更することの記載がある。   Patent Document 2 describes that a condition for changing the radio transmission power of each base station and its set value are set in the radio control station, and the radio transmission power of the base station is changed when the condition is satisfied. is there.

また特許文献３には、基地局が通話トラフィック量を測定し、通話トラフィック量に応じた送信部の送信出力の制御を行うことの記載がある。   Patent Document 3 also describes that the base station measures the call traffic volume and controls the transmission output of the transmitter according to the call traffic volume.

特開２０００−３１２３７７号公報JP 2000-312377 A 特開平０９−０６５４１９号公報Japanese Patent Laid-Open No. 09-065419 特開平１１−１５４９０５号公報Japanese Patent Laid-Open No. 11-154905

上記のように、デジタルコードレスシステムにて、代表外線に着信が入った場合に複数端末を鳴動させ、かつ相手の電話番号を各端末のディスプレイに表示させたい場合に各基地局は鳴動端末全てに一斉に個別着信をかける。ビジネスで使用する場合は比較的狭いエリアでそれを実現する事象が多く、そのような環境下で同時に個別着信をかけた場合は通話チャネルがお互い干渉を起こし着信が鳴らない端末が発生したり、鳴動が極端に遅れたりする現象が発生する。   As mentioned above, in the digital cordless system, each base station will ring to all ringing terminals when it is desired to ring multiple terminals when an incoming call is received on a representative outside line and to display the other party's phone number on the display of each terminal. Make individual calls at once. When using it for business, there are many events that realize it in a relatively small area, and when receiving individual calls at the same time in such an environment, there are terminals that cause the call channels to interfere with each other and do not ring, The phenomenon that the ringing is extremely delayed occurs.

特に着信状態においてはチャネル切り替えやハンドオーバといった干渉回避動作をサポートしていないものが多く実用上問題となる。   In particular, many incoming calls do not support interference avoidance operations such as channel switching and handover, which are practically problematic.

本発明は、システム起動時にトラフィックの高い基地局を指定して、基地局間で電界強度を測定し合い、トラフィックに適する待受けエリア及び送信電力の調整を自動的に設定することにより、置局設計を簡略化し、周波数利用効率を向上させることにより、安定した着信動作を実現することを目的とする。   The present invention designates a base station with high traffic at the time of system start-up, measures electric field strength between base stations, and automatically sets a standby area suitable for traffic and adjustment of transmission power. The purpose is to realize a stable incoming call operation by simplifying the above and improving the frequency utilization efficiency.

本発明に係わる無線通信方法は、第１の基地局と、トラフィック対策用の第２の基地局とが配置される無線通信システムの無線通信方法において、
前記第１及び第２の基地局間で、無線通信システム起動時に電界強度を測定し合い、前記第１及び第２の基地局と接続される主装置が、測定された情報を解析して前記第２の基地局のエリア情報を上げ、送信電力を低くすることを特徴とする。 A wireless communication method according to the present invention is a wireless communication method of a wireless communication system in which a first base station and a second base station for traffic countermeasures are arranged.
The first and second base stations measure the electric field strength at the time of starting the wireless communication system, and the main apparatus connected to the first and second base stations analyzes the measured information and analyzes the measured information. The area information of the second base station is raised, and the transmission power is lowered.

本発明に係わる無線通信システムは、第１の基地局と、トラフィック対策用の第２の基地局とが配置され、前記第１及び第２の基地局とは、システム起動時に電界強度を測定し合い、前記第１及び第２の基地局から測定された情報を受けて解析し、前記第２の基地局のエリア情報を上げ、送信電力を低くするように設定する主装置を備えてなることを特徴とする。   In the wireless communication system according to the present invention, a first base station and a second base station for traffic countermeasures are arranged, and the first and second base stations measure electric field strength at the time of system startup. And a main unit configured to receive and analyze the information measured from the first and second base stations, increase the area information of the second base station, and set the transmission power to be low. It is characterized by.

本発明に係わる主装置は、第１の基地局と、トラフィック対策用の第２の基地局とが配置され、前記第１及び第２の基地局と接続される主装置とを備えた無線通信システムに用いられる主装置であって、
無線通信システム起動時に第１及び第２の基地局との間で測定された電界強度を受けて解析し、前記第２の基地局のエリア情報を上げ、送信電力を低くするように設定することを特徴とする。 A main apparatus according to the present invention is a radio communication including a first base station and a second base station for traffic countermeasures, and a main apparatus connected to the first and second base stations. A main device used in the system,
Analysis is performed by receiving and analyzing the electric field strength measured between the first and second base stations when the wireless communication system is activated, and the area information of the second base station is increased and the transmission power is set to be lower. It is characterized by.

本発明の第一の効果は、トラフィックに対応したエリア設計が簡素化でき、送信電力のコントロールをすることにより周波数の利用効率を向上できることである。その結果、無線端末を一斉に鳴動させる動作を安定させることが可能となる。   The first effect of the present invention is that the area design corresponding to traffic can be simplified, and the frequency utilization efficiency can be improved by controlling the transmission power. As a result, it is possible to stabilize the operation of ringing the wireless terminals all at once.

本発明の第二の効果は、現行システムのハードウェアを変更することなくソフトウェアのみの変更により実現が可能となることである。   The second effect of the present invention is that it can be realized by changing only the software without changing the hardware of the current system.

本発明に係わるデシタルコードレスシステムの構成を示す構成図である。It is a block diagram which shows the structure of the digital cordless system concerning this invention. 着信の動作を説明する図である。It is a figure explaining the operation | movement of an incoming call. 本発明に係わるデシタルコードレスシステムでの置局設計の動作を説明する図である。It is a figure explaining the operation | movement of the station location design in the digital cordless system concerning this invention. 候補ＣＳテーブルを示す図である。It is a figure which shows a candidate CS table. 周波数利用効率の向上を説明するための図である。It is a figure for demonstrating the improvement of frequency utilization efficiency. 背景技術となるデシタルコードレスシステムの構成を示す構成図である。It is a block diagram which shows the structure of the digital cordless system used as background art.

以下、本発明の実施の形態について図面を用いて詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

図１に示すように、本実施形態のデシタルコードレスシステムは、無線端末PS1〜PS7、基地局CS1〜CS4、主装置MEから構成される。主装置MEには外線（代表）が接続されており、外線着信が入ると複数の無線端末PS1〜PS７が一斉に鳴動する。基地局CS1、CS4は第１の基地局となり、基地局CS2,CS3は基地局CS1、CS4より電波の到達範囲（エリア）（図中、実線又は破線で示されている領域）が狭くなっている。   As shown in FIG. 1, the digital cordless system according to the present embodiment includes radio terminals PS1 to PS7, base stations CS1 to CS4, and a main apparatus ME. An external line (representative) is connected to the main apparatus ME, and a plurality of wireless terminals PS1 to PS7 ring all at once when an incoming call is received. The base stations CS1 and CS4 are the first base stations, and the base stations CS2 and CS3 have a narrower radio wave reach (area) than the base stations CS1 and CS4 (areas indicated by solid lines or broken lines in the figure). Yes.

図２は着信動作を説明する図である。図２に示すように、代表外線に着信が入ると主装置ＭＥ、基地局CS1〜CS4を介して各無線端末PS1〜PS7へ一斉に着呼要求がかかる。デシタルコードレスシステムでは１台の基地局について３台の無線端末に着呼要求を送出する。ここでは、基地局CS3から無線端末PS1〜PS3に着呼要求を送出する場合を示している。無線端末PS1〜PS7のそれぞれで着信応答を基地局に返信した順番にキャリアセンスを実施して通話に使用する周波数を決定する。   FIG. 2 is a diagram for explaining an incoming call operation. As shown in FIG. 2, when an incoming call enters a representative outside line, incoming requests are made to the radio terminals PS1 to PS7 simultaneously via the main apparatus ME and the base stations CS1 to CS4. In the digital cordless system, an incoming call request is transmitted to three wireless terminals for one base station. Here, a case where an incoming call request is transmitted from the base station CS3 to the wireless terminals PS1 to PS3 is shown. Each of the wireless terminals PS1 to PS7 performs carrier sense in the order in which the incoming call response is returned to the base station, and determines the frequency to be used for the call.

キャリアセンスとは、1 slot（625μs）内で前縁，中央，後縁の３点で単発受信を行い、レベルの一番高いRSSI値とキャリアセンスレベル（44dBμV）を比較してそのslotが空slotかどうか判定する動作をいう。   Carrier sense is a single reception at the three points of the leading edge, center, and trailing edge within one slot (625μs). Compare the RSSI value with the highest level with the carrier sense level (44dBμV), and the slot is empty. This is an operation to determine whether a slot.

狭いエリア内で同時に複数端末を鳴動するような環境下において、図１のように基地局CS1，CS4（エリア最大）にて広帯域のエリアをカバーし、稼動しているデジタルコードレスシステムを想定する。デジタルコードレスの基地局は1台につき3通話の制限があるため、トラフィックが多い場所の対応として基地局CS2，CS3を増設する。トラフィックのために増設する基地局CS2，CS3は置局設計上、お互いの距離を離さず密集させて設置される。   In an environment where multiple terminals are ringed simultaneously in a narrow area, a digital cordless system is assumed that covers and operates a broadband area with base stations CS1 and CS4 (maximum area) as shown in FIG. Since digital cordless base stations are limited to 3 calls per unit, base stations CS2 and CS3 will be added to handle places with high traffic. Base stations CS2 and CS3 to be added for traffic are placed in close proximity without being separated from each other due to the station design.

原則として広いセルを組み合わせる中にトラフィック対策の基地局をエリアを絞って設置することで干渉（送信ＩＭ）を回避する方針とする。これは、広いセル中にトラフィック対策のセルが包括されるように基地局CS2，CS3を配置しないと、エリアを絞った基地局からゾーン流出した際に圏外のエリアが大きくなり不都合が生じるためである。   As a general rule, it is a policy to avoid interference (transmission IM) by installing a base station for traffic countermeasures in a narrow area while combining wide cells. This is because if the base stations CS2 and CS3 are not arranged so that traffic countermeasure cells are included in a wide cell, the out-of-service area will become large when the zone flows out of the base station with the narrowed area. is there.

以下、図３を用いて、本実施形態のデジタルコードレスシステムの動作について説明する。   Hereinafter, the operation of the digital cordless system of the present embodiment will be described with reference to FIG.

システムデータにおいて基地局CS2,CS3,CS4をグループ化しておく（ステップＳ１１）。システムが起動すると（ステップＳ１２）、基地局CS2,CS3,CS4は自システム内のCSID（システムIDと称す）と受信電界強度（RSSIと称す）を紐付けしたテーブルデータを各々測定して主装置のソフトへ通知する（ステップＳ１３）。図４は各基地局CS1〜CS4で作成される候補ＣＳテーブルを示す。   Base stations CS2, CS3 and CS4 are grouped in the system data (step S11). When the system is started (step S12), the base stations CS2, CS3, CS4 measure the table data in which the CSID (referred to as system ID) and the received electric field strength (referred to as RSSI) in the own system are respectively linked to the main unit. (Step S13). FIG. 4 shows a candidate CS table created by each of the base stations CS1 to CS4.

主装置のソフトは受けたデータを解析して各々初期エリア情報を有する基地局と、トラフィック対策の基地局とに分類して、トラフィック対策の基地局CS2,CS3に関してはエリア情報を10dB上げ、送信電力を10dB下げる（ステップ１４）。   The software of the main unit analyzes the received data and classifies it into a base station having initial area information and a traffic countermeasure base station, and for the traffic countermeasure base stations CS2 and CS3, the area information is increased by 10 dB and transmitted. The power is reduced by 10 dB (step 14).

この状態で稼動することにより、複雑な調整をせずに狭いエリアでトラフィックが多い場合でも周波数利用効率を向上させることが可能となる。   By operating in this state, frequency utilization efficiency can be improved even when there is a lot of traffic in a narrow area without complicated adjustment.

デジタルコードレスシステムでは、無線端末は、基地局からエリア情報と呼ばれる無線上の動作を決定するパラメータを受信してシステムの指示に従う。エリア情報の例として以下のパラメータが存在する。   In a digital cordless system, a wireless terminal receives a parameter for determining wireless operation called area information from a base station, and follows a system instruction. The following parameters exist as an example of area information.

待受け選択レベル： 待受け状態においてこのレベル以上の電界強度（RSSI）を受信した基地局に対して待受け動作を実施する。   Standby selection level: A standby operation is performed for a base station that has received an electric field strength (RSSI) higher than this level in the standby state.

待受け保持レベル： 待受けした状態からこのレベルを下回るとゾーン流出と判断する。   Stand-by holding level: If the level falls below this level from the stand-by state, it is determined that the zone has leaked.

無線端末は基地局（主装置）からエリア情報を受取り、無線端末が最低どのレベル以上の基地局に待ち受けるかを判定する。エリア情報を上げると各基地局毎のエリアが狭くなる。エリア情報を上げると各基地局毎のエリアが狭くなり、トラフィック対策として基地局を密集設置した場合に各基地局に待受ける無線端末の台数を均等に分散させることができる。   The wireless terminal receives area information from the base station (main apparatus), and determines at which minimum level or higher the base station is waiting for the wireless terminal. If the area information is increased, the area for each base station becomes narrower. When the area information is increased, the area for each base station is narrowed, and when the base stations are densely installed as a traffic countermeasure, the number of radio terminals waiting in each base station can be evenly distributed.

以下、送信電力を下げることによる効果について説明する。   Hereinafter, the effect of reducing the transmission power will be described.

デジタルコードレスの帯域（３００ｋＨｚ間隔）にて近傍のチャネル（周波数）を複数の無線端末で使用すると送信ＩＭが発生し、未使用のチャネルにも妨害波として認識される場合がある。特に狭いエリアに対してトラフィックが高い場合、この影響が大きくなる。   When a nearby channel (frequency) is used in a plurality of wireless terminals in a digital cordless band (300 kHz interval), a transmission IM is generated, and an unused channel may be recognized as an interference wave. In particular, when traffic is high in a narrow area, this influence becomes large.

図５に示すように、送信電力を下げることにより送信ＩＭのレベルが低くなり、上記の問題の緩和が期待できる。ここで、送信ＩＭとは、送信の相互変調のことで、例えば近傍で３chと５chを使用する無線端末と基地局が存在すると、１ch、７chにも歪成分が発生し、その成分がキャリアセンスレベルを超えた場合、実際には使用されていないチャネルがキャリアありと判定されて使用できなくなってしまうことがある。   As shown in FIG. 5, the transmission IM level is lowered by lowering the transmission power, and the above problems can be alleviated. Here, transmission IM refers to intermodulation of transmission. For example, if there are wireless terminals and base stations using 3ch and 5ch in the vicinity, distortion components are also generated in 1ch and 7ch, and these components are carrier sense. When the level is exceeded, a channel that is not actually used may be determined to have a carrier and may not be used.

以上本発明の実施形態として、デジタルコードレスシステムについて説明したが、本発明はエリア情報，送信電力が調整可能な仕組みを有する基地局にて構成されている無線通信システムへの応用が可能である。   Although the digital cordless system has been described as an embodiment of the present invention, the present invention can be applied to a wireless communication system configured with a base station having a mechanism capable of adjusting area information and transmission power.

本実施形態では、デジタルコードレスシステムにて狭いエリア内で同時に複数端末を鳴動するような環境下において、システム起動時にトラフィックの高い基地局を指定して基地局間で電界強度を測定し合い、トラフィックに最適な待受けエリア及び送信電力の調整を自動的に設定することにより、置局設計を簡略化し、周波数利用効率を向上させることができる。   In this embodiment, in an environment where multiple terminals are ringed simultaneously in a narrow area in a digital cordless system, base stations with high traffic are designated at the time of system start-up, and electric field strength is measured between the base stations. By automatically setting the optimal standby area and transmission power adjustment, the station design can be simplified and the frequency utilization efficiency can be improved.

本発明は、無線通信システム、特にデジタルコードレスシステムに好適に用いることができる。   The present invention can be suitably used for a wireless communication system, particularly a digital cordless system.

PS1〜PS7 無線端末
CS1〜CS4 基地局
ME 主装置 PS1 to PS7 wireless terminal
CS1-CS4 base station
ME main unit

Claims (5)

第１の基地局と、トラフィック対策用の第２の基地局とが配置される無線通信システムの無線通信方法において、
前記第１及び第２の基地局間で、無線通信システム起動時に電界強度を測定し合い、前記第１及び第２の基地局と接続される主装置が、測定された情報を解析して前記第２の基地局のエリア情報を上げ、送信電力を低くすることを特徴とする無線通信方法。 In a wireless communication method of a wireless communication system in which a first base station and a second base station for traffic countermeasures are arranged,
The first and second base stations measure the electric field strength at the time of starting the wireless communication system, and the main apparatus connected to the first and second base stations analyzes the measured information and analyzes the measured information. A wireless communication method characterized by raising area information of a second base station and lowering transmission power. 前記無線通信システムは、デジタルコードレスシステムである請求項１に記載の無線通信方法。   The wireless communication method according to claim 1, wherein the wireless communication system is a digital cordless system. 第１の基地局と、トラフィック対策用の第２の基地局とが配置され、前記第１及び第２の基地局とは、システム起動時に電界強度を測定し合い、前記第１及び第２の基地局から測定された情報を受けて解析し、前記第２の基地局のエリア情報を上げ、送信電力を低くするように設定する主装置を備えてなる無線通信システム。   A first base station and a second base station for traffic countermeasures are arranged, and the first and second base stations measure electric field strength at the time of system startup, and the first and second base stations A wireless communication system comprising a main device configured to receive and analyze information measured from a base station, increase area information of the second base station, and set to reduce transmission power. 前記無線通信システムは、デジタルコードレスシステムである請求項３に記載の無線通信システム。   The wireless communication system according to claim 3, wherein the wireless communication system is a digital cordless system. 第１の基地局と、トラフィック対策用の第２の基地局とが配置され、前記第１及び第２の基地局と接続される主装置とを備えた無線通信システムに用いられる主装置であって、
無線通信システム起動時に第１及び第２の基地局との間で測定された電界強度を受けて解析し、前記第２の基地局のエリア情報を上げ、送信電力を低くするように設定する主装置。 A main apparatus used in a radio communication system including a first base station and a second base station for traffic countermeasures, and a main apparatus connected to the first and second base stations. And
Mainly configured to receive and analyze the electric field strength measured between the first and second base stations when starting the wireless communication system, to increase the area information of the second base station, and to lower the transmission power apparatus.
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JP2012156870A (en) * 2011-01-27 2012-08-16 Kyocera Corp Radio base station and communication method

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JPH10209946A (en) * 1997-01-17 1998-08-07 Matsushita Electric Ind Co Ltd Cordless system
JPH1169421A (en) * 1997-08-11 1999-03-09 Toshiba Corp Simple portable telephone system
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JPH10209946A (en) * 1997-01-17 1998-08-07 Matsushita Electric Ind Co Ltd Cordless system
JPH1169421A (en) * 1997-08-11 1999-03-09 Toshiba Corp Simple portable telephone system
JP2008022484A (en) * 2006-07-14 2008-01-31 Kyocera Corp Base station device and communication distance control method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012156870A (en) * 2011-01-27 2012-08-16 Kyocera Corp Radio base station and communication method

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