JP2854967B2 - Zone judgment method - Google Patents
Zone judgment methodInfo
- Publication number
- JP2854967B2 JP2854967B2 JP33638190A JP33638190A JP2854967B2 JP 2854967 B2 JP2854967 B2 JP 2854967B2 JP 33638190 A JP33638190 A JP 33638190A JP 33638190 A JP33638190 A JP 33638190A JP 2854967 B2 JP2854967 B2 JP 2854967B2
- Authority
- JP
- Japan
- Prior art keywords
- electric field
- mobile station
- field level
- base station
- zone
- 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)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はゾーン判定方法に係り、特に小ゾーン構成の
移動通信方式において、移動局の在圏ゾーン判定を行う
ゾーン判定方法に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a zone determination method, and more particularly to a zone determination method for determining a zone in which a mobile station is located in a mobile communication system having a small zone configuration.
小ゾーン構成の移動通信方式の代表的な例として自動
車電話方式がある。自動車電話方式においては、無線機
の低消費電力化、及び同一チャネル干渉軽減を目的とし
て、対向する無線機での受信電界レベルを測定し、その
測定結果に基づいて無線機の送信電力を制御する方式を
採用している。A typical example of a mobile communication system having a small zone configuration is an automobile telephone system. In the mobile phone system, a reception electric field level at an opposing radio is measured, and the transmission power of the radio is controlled based on the measurement result for the purpose of reducing power consumption of the radio and reducing co-channel interference. The method is adopted.
具体的には、基地局が対向する移動局からの受信され
た電界レベル測定結果が高い値の場合には、所定の伝送
品質を満足する範囲内で、移動局に対する送信電力を下
げる制御を行う。一方、基地局は受信された電界レベル
測定結果が低い値の場合には最大送信電力を越えない範
囲内で移動局の送信電力を上げる制御を行う。Specifically, when the electric field level measurement result received from the opposite mobile station to the base station is a high value, control is performed to reduce the transmission power to the mobile station within a range that satisfies a predetermined transmission quality. . On the other hand, when the received electric field level measurement result is a low value, the base station performs control to increase the transmission power of the mobile station within a range not exceeding the maximum transmission power.
送信電力制御とは別に時分割多元接続方式(TDMA方
式)による移動通信方式は、ゾーン判定の高速化及び、
基地局の制御装置の負荷を分散する効果がある。このた
め、移動局によるゾーン移行検出法が比較的容易に可能
である。このゾーン移行検出は移動局が通信中の無線チ
ャネルの受信電界レベルと周辺ゾーンの受信電界レベル
を測定し、比較して、周辺ゾーンの受信電界レベルが高
ければ、移動局はゾーン移行を行ったことが確認され
る。In addition to the transmission power control, the mobile communication system based on the time division multiple access system (TDMA system) can speed up zone determination and
This has the effect of distributing the load on the control device of the base station. Therefore, the zone shift detection method by the mobile station can be relatively easily performed. In this zone shift detection, the mobile station measures the received electric field level of the wireless channel with which the mobile station is communicating and the received electric field level of the peripheral zone, compares them, and if the received electric field level of the peripheral zone is higher, the mobile station has performed the zone shift. It is confirmed that.
しかるに、従来の送信電力制御を基地局側で行うシス
テムで、移動局によるゾーン判定方法を適応する場合
に、移動局が周辺ゾーンの受信電界レベルを測定する時
には基地局から一定電力で送信されている周波数を測定
するのが望ましいので、例えば、共通制御チャネルに代
表されるような常時、移動局は基地局からそのゾーンで
設定されている最大電力で移動局に送信されている無線
チャネルのレベルを測定する。しかし、基地局が通信中
に無線チャネルの送信電力制御を行っている場合には、
移動局がレベル測定を行った時に最大出力で送信した場
合に比べて低く受信されるため、周辺ゾーンの受信電界
レベルの方が高くなり、移動局がゾーン移動していない
にもかかわらず、移動局はゾーンを移行したと判断して
しまい、ゾーン切り換えを行ってしまうという問題があ
った。However, in a system in which conventional transmission power control is performed on the base station side, when the zone determination method by the mobile station is applied, when the mobile station measures the reception electric field level in the surrounding zone, the base station transmits the received electric field level at a constant power. It is desirable to measure the frequency at which the mobile station is constantly transmitting, for example, as represented by a common control channel, from the base station to the mobile station at the maximum power set in the zone. Is measured. However, if the base station controls the transmission power of the wireless channel during communication,
When the mobile station performs level measurement, the signal is received at a lower level than when transmitting at the maximum power.Therefore, the received electric field level in the surrounding zone becomes higher, and the mobile station moves even though it is not moving in the zone. There is a problem that the station determines that the zone has been shifted and performs zone switching.
本発明は上記の点に鑑みなされたもので基地局が送信
電力制御を行い、且つ移動局が通信中の基地局の受信電
界レベルと周辺の基地局の受信電界レベルの測定及び比
較を行い、移動局がゾーン移行を行なっていない状況を
正確に把握できるTDMA移動通信方式のゾーン判定方法を
提供することを目的とする。The present invention has been made in view of the above points, the base station performs transmission power control, and the mobile station performs measurement and comparison of the reception electric field level of the base station during communication and the reception electric field level of the peripheral base station, An object of the present invention is to provide a TDMA mobile communication system zone determination method capable of accurately grasping a situation in which a mobile station is not performing zone transfer.
第1図は本発明の原理説明図を示す。複数の基地局で
サービスエリアをカバーし、移動局と基地局間で時分割
多元接続方式で通信を行い、移動局での受信電界レベル
に応じて基地局送信電力を制御する移動通信方式のゾー
ン判定方法において、移動局は測定手段により通信中の
在圏ゾーンの第1の受信電界レベルと周辺ゾーンの第2
の受信電界レベルを測定し、基地局に第1の受信電界レ
ベルの測定結果を送信し(ステップ11)、基地局は受信
した第1の受信電界レベルに基づいて送信電力に関する
情報を移動局に送信し(ステップ13)、移動局は受信し
た送信電力に関する情報を基に補正した(ステップ15)
通信中の無線チャネルの受信電界レベルと第2の受信電
界レベルとを判定手段により比較してゾーンを判定する
(ステップ17)。また、基地局が受信電界レベルの補正
情報を移動局に送信し、移動局が受信電界レベルを比較
して在圏ゾーンの判定を行う際に、移動局は受信した補
正情報を基に通信中の無線チャネルの受信電界レベルを
補正する。FIG. 1 is a diagram illustrating the principle of the present invention. A mobile communication system zone that covers the service area with multiple base stations, performs communication between the mobile station and the base station using a time division multiple access system, and controls the base station transmission power according to the received electric field level at the mobile station. In the determination method, the mobile station uses the measuring means to determine the first reception electric field level of the visited zone in communication and the second reception electric field level of the surrounding zone.
, And transmits the measurement result of the first received electric field level to the base station (step 11), and the base station sends information on the transmission power to the mobile station based on the received first received electric field level. After transmitting (step 13), the mobile station corrects based on the information on the received transmission power (step 15).
The zone is determined by comparing the received electric field level of the wireless channel being communicated with the second received electric field level by the judging means (step 17). Also, when the base station transmits the received electric field level correction information to the mobile station, and the mobile station compares the received electric field level to determine the zone in which the mobile station is located, the mobile station is communicating based on the received correction information. The received electric field level of the wireless channel is corrected.
本発明は移動局が通信中の基地局のゾーンの受信電界
レベルと周辺ゾーンの受信電界レベルを測定し、その測
定結果を送信情報として基地局に送信する。通信中の基
地局は移動局からの送信情報を基に、通信中の無線チャ
ネルの電界レベルより補正情報を求め、さらに、基地局
はこの補正情報を移動局に送信する。補正情報を受信し
た移動局は通信中の無線チャネルの受信電界レベルを補
正し、補正後の電界レベルと周辺ゾーンの受信電界レベ
ルを比較して、周辺ゾーンの受信電界レベルの方が高け
ればゾーン移行を行うが、低ければゾーン移行は行わな
い。これにより、移動局の正確な在圏ゾーンを判断す
る。According to the present invention, the mobile station measures the reception electric field level in the zone of the base station with which the mobile station is communicating and the reception electric field level in the peripheral zone, and transmits the measurement result to the base station as transmission information. The base station in communication obtains correction information from the electric field level of the wireless channel in communication based on the transmission information from the mobile station, and the base station transmits the correction information to the mobile station. The mobile station that has received the correction information corrects the received electric field level of the wireless channel in communication, compares the corrected electric field level with the received electric field level of the peripheral zone, and if the received electric field level of the peripheral zone is higher, the zone is higher. Perform the transition, but do not perform the zone transition if it is low. Thereby, the accurate zone in which the mobile station is located is determined.
第2図は一般的な自動車電話システムにおけるシステ
ム構成を示す図である。同図において、移動局101は基
地局102と通信中である。また、基地局103〜108は基地
局102に隣接しており、基地局103〜108には夫々ゾーン
内で使用する共通制御チャネルを少なくとも1つは設定
されている。それらのチャネルは常に各基地局で設定で
きる最大の出力で送信している。FIG. 2 is a diagram showing a system configuration in a general car telephone system. In the figure, a mobile station 101 is communicating with a base station 102. The base stations 103 to 108 are adjacent to the base station 102, and each of the base stations 103 to 108 has at least one common control channel used in a zone. These channels always transmit at the maximum power that can be set at each base station.
第3図は本発明の一実施例の移動局の構成を示す。移
動局101は変調回路201、復調回路202、シンセサイザ20
3、受信レベル測定回路204、タイミング発生回路205、
符号化回路206、制御回路207、復号化回路208から構成
される。FIG. 3 shows the configuration of a mobile station according to one embodiment of the present invention. The mobile station 101 includes a modulation circuit 201, a demodulation circuit 202, and a synthesizer 20.
3, reception level measurement circuit 204, timing generation circuit 205,
It comprises an encoding circuit 206, a control circuit 207, and a decoding circuit 208.
受信レベル測定回路204はタイミング発生回路205から
のフレームタイミングに基づいて、制御回路207から指
定された周波数シンセサイザ203の周波数を切り換えて
受信レベルを測定する回路である。タイミング発生回路
205はフレームタイミングを発生する回路である。符号
化回路206は基地局102からの情報信号と制御回路207か
らの制御信号をTDMAフレームに多重化し、更に、無線区
間で伝送するために信号を符号化する回路である。制御
回路207は受信レベル測定回路204からの信号や復号化回
路208からの復号化信号により移動局101を制御する。復
号化回路208は受信信号を復号化し、受信信号を制御信
号と情報信号に分離し、制御信号は制御回路207に送出
し、情報信号は基地局102に送出する。The reception level measurement circuit 204 is a circuit that switches the frequency of the frequency synthesizer 203 specified by the control circuit 207 based on the frame timing from the timing generation circuit 205 and measures the reception level. Timing generation circuit
205 is a circuit for generating a frame timing. The encoding circuit 206 is a circuit that multiplexes an information signal from the base station 102 and a control signal from the control circuit 207 into a TDMA frame, and further encodes the signal for transmission in a wireless section. The control circuit 207 controls the mobile station 101 based on a signal from the reception level measurement circuit 204 and a decoded signal from the decoding circuit 208. The decoding circuit 208 decodes the received signal, separates the received signal into a control signal and an information signal, sends the control signal to the control circuit 207, and sends the information signal to the base station 102.
第4図は本発明の一実施例の移動局での測定動作の説
明図を示す。同図において、(A)は移動局101の受信
信号を示し、(B)は移動局101の受信周波数を示す。
(B)のフレームF1は同図(A)の30a〜30fのタイミン
グで通信に使用している無線チャネルの周波数である。
フレームF2〜フレームF7はそれぞれの周辺基地局103〜1
08の共通制御チャネルの周波数である。FIG. 4 is an explanatory diagram of a measurement operation in a mobile station according to one embodiment of the present invention. In the figure, (A) shows the reception signal of the mobile station 101, and (B) shows the reception frequency of the mobile station 101.
The frame F1 in (B) is the frequency of the wireless channel used for communication at the timings 30a to 30f in FIG.
Frames F2 to F7 correspond to respective peripheral base stations 103-1.
08 is the frequency of the common control channel.
基地局102では移動局101が通信を開始したときに周辺
基地局103〜108で使用している共通制御チャネルの周波
数の中からそれぞれ1つずつ周波数F2〜F7を移動局101
に通知する。移動局101は通信に使用していないスロッ
トの時間に周辺基地局103〜108から通知された周波数に
切り換えて、同図(A)の31a〜31fのタイミングで周辺
ゾーンからの信号を受信し、順次周辺基地局103〜108の
受信電界レベルを測定する。In the base station 102, when the mobile station 101 starts communication, one of the frequencies of the common control channels used by the peripheral base stations 103 to 108 is used for each of the frequencies F2 to F7.
Notify. The mobile station 101 switches to the frequency notified from the peripheral base stations 103 to 108 at the time of the slot not used for communication and receives signals from the peripheral zone at timings 31a to 31f in FIG. The reception electric field levels of the peripheral base stations 103 to 108 are sequentially measured.
第5図は本発明の一実施例の移動局でのレベル測定結
果及び補正動作の説明図を示す。同図中、破線で示され
るレベル401は通信中の基地局102の受信電界レベルを示
す、レベル403〜408は周辺基地局103〜108の受信電界レ
ベル、レベル補正値409は基地局102から通知される。レ
ベル402は補正後の通信中の基地局102の受信電界レベル
を示す。FIG. 5 is an explanatory diagram of a level measurement result and a correction operation in a mobile station according to one embodiment of the present invention. In the figure, a level 401 indicated by a broken line indicates a reception electric field level of the base station 102 during communication, levels 403 to 408 are reception electric field levels of the peripheral base stations 103 to 108, and a level correction value 409 is notified from the base station 102. Is done. Level 402 indicates the reception electric field level of the base station 102 during communication after the correction.
第6図は本発明の一実施例の動作のシーケンスを示
す。第6図のシーケンスを示す図と共に本実施例の動作
を説明する。FIG. 6 shows a sequence of operation of one embodiment of the present invention. The operation of this embodiment will be described with reference to the sequence diagram of FIG.
通信中の基地局102のチャネルに対して、移動局101は
受信レベル測定回路204で受信電界レベルを測定して制
御回路207内のメモリに記憶する(ステップ501)。さら
に、移動局101は制御チャネルを用いて基地局102にも測
定した受信電界レベルを通知する(ステップ502)。For the channel of the base station 102 under communication, the mobile station 101 measures the reception electric field level by the reception level measurement circuit 204 and stores it in the memory in the control circuit 207 (step 501). Further, the mobile station 101 notifies the base station 102 of the measured received electric field level using the control channel (step 502).
基地局102は移動局101から送信された受信電界レベル
情報と基地局102の定レベルとを比較し、移動局101から
の受信電界レベル情報が基地局102の所定レベルより高
い場合には、基地局102では所定の伝送品質を満足する
範囲内で、送信電力を下げ、その値を送信電力設定値と
する。また、移動局101からの受信電界レベル情報が基
地局102の所定レベルより低い場合には、最大送信電力
を越えない範囲内で送信電力を上げ、その値を送信電力
設定値とする(ステップ503)。さらに、基地局102の最
大送信電力とステップ503で設定した送信電力設定値の
差を求め(ステップ505)、これを補正値として、基地
局102から移動局101に通知する(ステップ506)。The base station 102 compares the received electric field level information transmitted from the mobile station 101 with a constant level of the base station 102, and if the received electric field level information from the mobile station 101 is higher than a predetermined level of the base station 102, the base station 102 The station 102 lowers the transmission power within a range that satisfies the predetermined transmission quality, and sets that value as the transmission power set value. If the received electric field level information from the mobile station 101 is lower than the predetermined level of the base station 102, the transmission power is increased within a range not exceeding the maximum transmission power, and that value is set as a transmission power set value (step 503). ). Further, a difference between the maximum transmission power of the base station 102 and the transmission power set value set in step 503 is obtained (step 505), and this is notified from the base station 102 to the mobile station 101 as a correction value (step 506).
移動局101は第4図に示すように、TDMAのタイムスロ
ット時にフレームF2〜F7の周辺基地局103〜108の制御チ
ャネルの周波数に切り換えて周辺基地局103〜108の受信
電界レベルを測定する。さらに第5図に示すように、通
信中のチャネルの受信電界レベル401に基地局102からの
補正値409により、レベルを補正して補正後の基地局102
の受信電界レベル402を設定する(ステップ507)。As shown in FIG. 4, the mobile station 101 switches to the control channel frequency of the peripheral base stations 103 to 108 in the frames F2 to F7 at the time slot of the TDMA and measures the reception electric field level of the peripheral base stations 103 to 108. Further, as shown in FIG. 5, the received electric field level 401 of the channel under communication is corrected by the correction value 409 from the base station 102, and the corrected base station 102
Is set (step 507).
第5図において、移動局101に関する周辺基地局の受
信電界レベルが最も高いのは基地局104の受信電界レベ
ル404である。この基地局104の受信電界レベル404と補
正後の基地局102の受信電界レベル402を比較する(ステ
ップ509)。このとき、基地局102の受信電界レベル402
が周辺基地局104の受信電界レベル404より高ければ、移
動局101はゾーン移行ではないと判断する。また、基地
局102の受信電界レベル402が周辺基地局104の受信電界
レベル404より低ければ移動局101はゾーン移行であると
判断する(ステップ511)。In FIG. 5, the highest reception electric field level of the peripheral base station with respect to the mobile station 101 is the reception electric field level 404 of the base station 104. The received electric field level 404 of the base station 104 is compared with the corrected received electric field level 402 of the base station 102 (step 509). At this time, the reception electric field level 402 of the base station 102
Is higher than the reception electric field level 404 of the peripheral base station 104, the mobile station 101 determines that the transfer is not a zone shift. If the received electric field level 402 of the base station 102 is lower than the received electric field level 404 of the peripheral base station 104, the mobile station 101 determines that the zone has been shifted (step 511).
第5図では基地局102の送信電力の補正前は移動局101
の受信電界レベルが通信中の基地局102より周辺の基地
局104の受信電界レベル404の方が高く、補正後は通信中
の基地局102のレベル402の方が高くなった例を示してい
る。このように、基地局101から受信電界レベルの補正
値409を通信中の移動局101に通知することにより、基地
局102が送信電力制御下でも移動局101は正確なゾーン移
行判定を行うことができる。In FIG. 5, the mobile station 101 before the transmission power of the base station 102 is corrected.
This shows an example in which the received electric field level of the peripheral base station 104 is higher than the received electric field level 404 of the surrounding base station 104 than the communicating base station 102, and the level 402 of the communicating base station 102 is higher after correction. . As described above, by notifying the mobile station 101 that is communicating the correction value 409 of the received electric field level from the base station 101, the mobile station 101 can perform an accurate zone shift determination even when the base station 102 is under transmission power control. it can.
即ち、送信電力制御による基地局102での送信電力の
補正値を移動局101に通知しない場合には、通信中の基
地局102では第5図の401を自局レベルとするため、移動
局101はこの401より高い404を移行先ゾーンと判定して
ゾーン切り換えを行ってしまう。これに対し、本発明を
用いれば、通信中の基地局102の受信電界レベルは補正
後の402とするため、他の基地局103〜108の受信電界レ
ベルはすべて、401より低いため移動局101はゾーン切り
換えを行わない。That is, when the mobile station 101 is not notified of the correction value of the transmission power at the base station 102 due to the transmission power control, the base station 102 in communication sets the level of 401 in FIG. Will determine the 404 higher than the 401 as the migration destination zone and will switch the zone. On the other hand, according to the present invention, the received electric field level of the base station 102 during communication is set to 402 after correction, and the received electric field levels of the other base stations 103 to 108 are all lower than 401, so that the mobile station 101 Does not switch zones.
なお、上記の例では基地局102で送信電力を変更した
場合のみ補正値を移動局101に通知する例を説明した
が、基地局102が他の制御信号がない場合に常時補正値
を移動局101に通知する方法や、専用の制御チャネルを
設けて、常時補正値を通知する方法を用いることによ
り、制御信号の信頼性を向上することが可能となり、よ
り確実な制御を行うことができる。In the above example, an example in which the correction value is notified to the mobile station 101 only when the transmission power is changed in the base station 102 has been described. However, when the base station 102 does not have another control signal, the correction value is always set to the mobile station 101. By using a method of notifying 101 or a method of always providing a correction value by providing a dedicated control channel, the reliability of the control signal can be improved, and more reliable control can be performed.
また、上記のシーケンスにおいて、ステップ505及び
ステップ506の処理で、最大送信電力と送信電力設定値
の実際の差分より小さい値、または、実際の値より大き
い値を補正値として移動局101に通知する制御も可能で
ある。基地局102が小さい値を移動局101に通知した場合
には、移動局101はゾーン境界のレベルの手前でゾーン
移行の判定を行うため、特定のエリアにトラヒックが集
中している場合に移動局101を周辺ゾーンに分散させる
効果がある。例えば移動局101が在圏している基地局102
のゾーンにトラヒックが集中しているとすると、周辺基
地局104の受信電界レベルが他の周辺基地局より高いと
すると、移動局101は基地局104のゾーンにゾーン移行す
る。In the above-described sequence, in the processing of steps 505 and 506, a value smaller than the actual difference between the maximum transmission power and the transmission power set value or a value larger than the actual value is notified to the mobile station 101 as a correction value. Control is also possible. When the base station 102 notifies the mobile station 101 of a small value, the mobile station 101 performs zone determination before the zone boundary level, so that when traffic is concentrated in a specific area, the mobile station 101 There is an effect of dispersing 101 in peripheral zones. For example, the base station 102 where the mobile station 101 is located
Assuming that traffic is concentrated in this zone, and that the received electric field level of the peripheral base station 104 is higher than the other peripheral base stations, the mobile station 101 shifts to the zone of the base station 104.
逆に基地局102が大きい値を移動局101に通知した場合
にはゾーン境界をある程度越えてもゾーン移行の判定を
行わないため、周辺のエリアのトラヒックが多く、自局
エリアのトラヒックが少ない場合に、周辺基地局103〜1
08へのチャネル切り換えを抑制することができる。Conversely, when the base station 102 notifies the mobile station 101 of a large value, the zone transition is not determined even if the zone boundary is exceeded to some extent, so that there is a large amount of traffic in the surrounding area and a small amount of traffic in the own station area. In addition, neighboring base stations 103-1
Channel switching to 08 can be suppressed.
本発明によれば基地局で送信電力制御を行っていると
きに、レベル測定を行った場合に最大出力で送信した場
合に比べて移動局では低く受信されるが、基地局が補正
値を移動局に通知することにより、基地局が送信電力制
御を行っていても正確なゾーン移行の判定ができる。さ
らに、移動局に通知する受信電界レベルの補正値をダイ
レクトに操作することにより、エリアのトラヒック分布
が特定のゾーンへ集中することを回避することにより、
呼損率を低下させることができる等、実用上極めて有用
である。According to the present invention, when transmission power control is performed at the base station, the level is measured and the mobile station receives a lower value than when transmitting at the maximum output, but the base station moves the correction value. By notifying the station, accurate zone shift determination can be performed even when the base station performs transmission power control. Furthermore, by directly operating the correction value of the received electric field level to be notified to the mobile station, by avoiding the traffic distribution of the area from being concentrated on a specific zone,
This is extremely useful in practical use, for example, the call loss rate can be reduced.
第1図は本発明の原理説明図、 第2図は一般的な自動車電話方式におけるシステム構成
図、 第3図は本発明の一実施例の移動局の構成図、 第4図は本発明の一実施例の移動局での測定動作の説明
図、 第5図は本発明の一実施例の移動局でのレベル測定結果
及び補正動作の説明図、 第6図は本発明の一実施例のシーケンスを示す図であ
る。 101……移動局,102〜108……基地局、201……変調回
路、202……復調回路、203……シンセサイザ、204……
受信電界レベル測定回路、205……タイミング発生回
路、206……符号化回路、207……制御回路、208……復
号化回路。FIG. 1 is a diagram for explaining the principle of the present invention, FIG. 2 is a system configuration diagram in a general automobile telephone system, FIG. 3 is a configuration diagram of a mobile station according to an embodiment of the present invention, and FIG. FIG. 5 is an explanatory diagram of a measuring operation in a mobile station according to one embodiment; FIG. 5 is an explanatory diagram of a level measurement result and a correcting operation in a mobile station according to an embodiment of the present invention; It is a figure showing a sequence. 101 mobile station, 102 to 108 base station, 201 modulation circuit, 202 demodulation circuit, 203 synthesizer, 204
Receive electric field level measurement circuit, 205: timing generation circuit, 206: encoding circuit, 207: control circuit, 208: decoding circuit.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小林 勝美 東京都千代田区内幸町1丁目1番6号 日本電信電話株式会社内 (72)発明者 広池 彰 東京都千代田区内幸町1丁目1番6号 日本電信電話株式会社内 (56)参考文献 特開 昭59−161139(JP,A) (58)調査した分野(Int.Cl.6,DB名) H04B 7/24 - 7/26 H04Q 7/00 - 7/38──────────────────────────────────────────────────続 き Continuing on the front page (72) Katsumi Kobayashi, inventor, 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Akira Hiroike, 1-16-1 Uchisaiwaicho, Chiyoda-ku, Tokyo Japan (56) References JP-A-59-161139 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) H04B 7/24-7/26 H04Q 7/00- 7/38
Claims (2)
し、移動局と基地局間で、時分割多元接続方式で通信を
行い、移動局での受信電界レベルに応じて基地局送信電
力を制御する移動通信方式のゾーン判定方法において、 前記移動局は測定手段により通信中の在圏ゾーンの第1
の受信電界レベルと周辺ゾーンの第2の受信電界レベル
を測定し、前記基地局に該第1の受信電界レベルの測定
結果を送信し、 該基地局は受信した該第1の受信電界レベルに基づいて
送信電力に関する情報を該移動局に送信し、 該移動局は受信した該送信電力に関する情報を基に補正
した通信中の無線チャネルの受信電界レベルと前記第2
の受信電界レベルとを判定手段により比較してゾーンを
判定する ことを特徴とするゾーン判定方法。1. A service area is covered by a plurality of base stations, communication is performed between a mobile station and a base station by a time division multiple access system, and transmission power of the base station is controlled according to a reception electric field level at the mobile station. In the mobile communication system zone determination method, the mobile station uses a measuring unit to determine a first zone of a communication zone in communication.
Measuring the first received electric field level of the peripheral zone and the second received electric field level of the peripheral zone, and transmitting the measurement result of the first received electric field level to the base station. The mobile station transmits information on the transmission power to the mobile station based on the received information on the transmission power and the reception electric field level of the wireless channel in communication corrected based on the received information on the transmission power.
A zone is determined by comparing the received electric field level with a received electric field level by a determination unit.
前記移動局に送信し、前記移動局が受信電界レベルを比
較して在圏ゾーンの判定を行う際に、 前記移動局は受信した補正情報を基に前記通信中の無線
チャネルの受信電界レベルを補正する ことを特徴とする請求項1記載のゾーン判定方法。2. The mobile station receives, when the base station transmits reception electric field level correction information to the mobile station, the mobile station compares the received electric field level and determines a zone in which the mobile station is located. The zone determination method according to claim 1, wherein the reception electric field level of the wireless channel during communication is corrected based on the correction information.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP33638190A JP2854967B2 (en) | 1990-11-30 | 1990-11-30 | Zone judgment method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP33638190A JP2854967B2 (en) | 1990-11-30 | 1990-11-30 | Zone judgment method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04207534A JPH04207534A (en) | 1992-07-29 |
JP2854967B2 true JP2854967B2 (en) | 1999-02-10 |
Family
ID=18298551
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP33638190A Expired - Lifetime JP2854967B2 (en) | 1990-11-30 | 1990-11-30 | Zone judgment method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2854967B2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2818518B2 (en) * | 1992-02-27 | 1998-10-30 | 日本電気株式会社 | TDMA mobile communication system handover control system |
TW347616B (en) * | 1995-03-31 | 1998-12-11 | Qualcomm Inc | Method and apparatus for performing fast power control in a mobile communication system a method and apparatus for controlling transmission power in a mobile communication system is disclosed. |
JP2008072669A (en) * | 2006-09-15 | 2008-03-27 | Fujitsu Ltd | Base station device used in radio communication system |
US8126499B2 (en) * | 2007-07-06 | 2012-02-28 | Qualcomm Incorporated | Processing Qoffset parameter |
-
1990
- 1990-11-30 JP JP33638190A patent/JP2854967B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH04207534A (en) | 1992-07-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0472511B1 (en) | Handoff of a mobile station between half rate and full rate channels | |
US5832368A (en) | Base station selection scheme for CDMA cellular system using perch channel and received SIR | |
JP3966369B2 (en) | Forward traffic channel power control method and apparatus for CDMA wireless subscriber network system | |
JP3214466B2 (en) | Mobile communication system, communication control method therefor, base station and mobile station used for the same | |
US5995836A (en) | Method and system for variable handoff hysteresis in a radiocommunication system | |
US7643565B2 (en) | Portable terminal, communication system, and communication method | |
EP1437913B1 (en) | Establishment of macro diversity with random access type connections in a cellular radio system | |
US6909905B2 (en) | Mobile communications control including change of bit rate based on traffic and transmit power | |
US5459873A (en) | Method and communication system for improved channel scanning and link establishment determinations | |
EP1185120A1 (en) | Base station apparatus and handover control method | |
KR20020094045A (en) | Power control in radio system | |
JPH06303181A (en) | Equipment and method for controlling power of radio telephone | |
JP2992563B2 (en) | Mobile communication system | |
WO2001052586A1 (en) | Optimized sleep mode operation | |
US5257402A (en) | Method for effecting handoff in a multi-site communication system | |
JPH10503891A (en) | Method and base station for improving connection quality in a cellular radio system | |
WO2004014097A1 (en) | Adaptive dual-mode reverse link scheduling method for wireless telecommunications networks | |
KR100423622B1 (en) | Base station device and method for preventing degradation of circuit quality | |
JP2854967B2 (en) | Zone judgment method | |
EP1298816B1 (en) | Transmission power control method and mobile station | |
JP3344897B2 (en) | Capacity control method in CDMA mobile communication | |
EP0943188B1 (en) | Method of improving connection quality and system capacity, and a cellular radio system thereof | |
JP3253419B2 (en) | Mobile communication device and mobile station device | |
US6885650B1 (en) | Method, radio communications system and mobile station for information transmission | |
JP3042041B2 (en) | Zone judgment method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071120 Year of fee payment: 9 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081120 Year of fee payment: 10 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091120 Year of fee payment: 11 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091120 Year of fee payment: 11 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101120 Year of fee payment: 12 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111120 Year of fee payment: 13 |
|
EXPY | Cancellation because of completion of term | ||
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111120 Year of fee payment: 13 |