JP3484017B2 - Frequency band use method and base station apparatus in CDMA mobile communication system - Google Patents
Frequency band use method and base station apparatus in CDMA mobile communication systemInfo
- Publication number
- JP3484017B2 JP3484017B2 JP17669296A JP17669296A JP3484017B2 JP 3484017 B2 JP3484017 B2 JP 3484017B2 JP 17669296 A JP17669296 A JP 17669296A JP 17669296 A JP17669296 A JP 17669296A JP 3484017 B2 JP3484017 B2 JP 3484017B2
- Authority
- JP
- Japan
- Prior art keywords
- frequency band
- base station
- value
- mobile station
- interference wave
- 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
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Mobile Radio Communication Systems (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、符号分割多元接続
（以下、ＣＤＭＡと略称する）方式の移動通信システム
において基地局と移動局との間の通信に複数の周波数帯
を使用可能である場合、周波数帯毎の使用頻度を均一化
し得るＣＤＭＡ移動通信システムにおける周波数帯使用
方法および基地局装置に関する。The present invention relates to a case where a plurality of frequency bands can be used for communication between a base station and a mobile station in a code division multiple access (hereinafter abbreviated as CDMA) type mobile communication system. The present invention relates to a frequency band using method and a base station apparatus in a CDMA mobile communication system capable of equalizing the frequency of use for each frequency band.
【０００２】[0002]
【従来の技術】ＣＤＭＡ移動通信システムにおいて、複
数の周波数帯が使用可能である場合、各周波数帯を均一
に使用することが好ましいが、無計画に使用周波数帯を
選択した場合には、使用頻度の偏りが周波数帯間で生じ
得る。例えば、２つの周波数帯を使用可能である場合、
一方の周波数帯のみが多く使用され、他方の周波数帯は
あまり使用されないということが発生するというように
偏りが生じる。2. Description of the Related Art In a CDMA mobile communication system, when a plurality of frequency bands can be used, it is preferable to use each frequency band uniformly. Bias can occur between frequency bands. For example, if two frequency bands are available,
A bias occurs in that only one frequency band is frequently used and the other frequency band is rarely used.
【０００３】このような偏りが生じる場合、一部の周波
数帯は空きがないが、他の周波数帯には空きがあるとい
う状況が生じ得る。このような状況では、隣接セルで空
きがない周波数帯で通信している移動局にてソフトハン
ドオーバが起動された場合、同周波ソフトハンドオーバ
が実行できず、異周波ソフトハンドオーバを実行せざる
を得ないことから、無線回線容量が圧迫されることにな
る。When such a deviation occurs, a situation may occur in which some frequency bands have no vacancy but other frequency bands have vacancy. In such a situation, if a soft handover is activated in a mobile station communicating in a frequency band in which there is no vacancy in an adjacent cell, the same frequency soft handover cannot be executed and the different frequency soft handover must be executed. Since it does not exist, the wireless bandwidth will be pressured.
【０００４】また、偏りがある場合、周波数帯毎に干渉
量に差が生じ、これにより周波数帯毎に所要の送信電力
が異なることとなる。この結果、使用頻度の高い周波数
帯で通信する移動局は、使用頻度の低い周波数帯で通信
する移動局に比べ、大きい送信電力で通信する必要があ
るため、移動局によってバッテリの寿命に差が生じるこ
とになる。Further, when there is a deviation, a difference occurs in the amount of interference for each frequency band, so that the required transmission power differs for each frequency band. As a result, a mobile station that communicates in a frequency band that is frequently used needs to transmit at a higher transmission power than a mobile station that communicates in a frequency band that is not frequently used. Will occur.
【０００５】[0005]
【発明が解決しようとする課題】上述したように、周波
数帯の使用頻度に偏りが生じると、同周波ソフトハンド
オーバを実行できず、異周波ソフトハンドオーバを実行
せざるを得ないことから、無線回線容量が圧迫されると
いう問題がある。As described above, if the frequency of use of the frequency band is biased, the same frequency soft handover cannot be executed and the different frequency soft handover must be executed. There is a problem that the capacity is compressed.
【０００６】また、偏りが生じると、使用頻度の高い周
波数帯で通信する移動局は大きい送信電力で通信する必
要があるため、移動局によってバッテリの寿命に差が生
じることになり、サービス提供上適当でないという問題
がある。Further, when the deviation occurs, a mobile station that communicates in a frequency band that is frequently used needs to communicate with a large transmission power, which causes a difference in battery life depending on the mobile station. There is a problem that it is not suitable.
【０００７】本発明は、上記に鑑みてなされたもので、
その目的とするところは、複数の周波数帯の使用頻度を
均一にし得るＣＤＭＡ移動通信システムにおける周波数
帯使用方法および基地局装置を提供することにある。The present invention has been made in view of the above,
An object of the present invention is to provide a frequency band using method and a base station apparatus in a CDMA mobile communication system that can make the frequency of use of a plurality of frequency bands uniform.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するた
め、請求項１記載の本発明は、基地局と移動局との間の
通信に複数の周波数帯を使用可能であるＣＤＭＡ移動通
信システムにおける周波数帯使用方法であって、基地局
が発着信接続の要求が生じた時点またはそれ以前に、セ
ル／セクタ内での接続回線数を複数の周波数帯について
測定し、新たに設定する無線回線の周波数帯として前記
測定値が最も小さい周波数帯を使用することを要旨とす
る。In order to achieve the above object, the present invention according to claim 1 is a CDMA mobile communication system capable of using a plurality of frequency bands for communication between a base station and a mobile station. This is a frequency band usage method, in which the number of connected lines in a cell / sector is measured for a plurality of frequency bands at or before the time when the request for the outgoing / incoming connection is made by the base station, and the newly set wireless line is set. The gist is to use the frequency band with the smallest measured value as the frequency band.
【０００９】これにより、発着信接続の要求が生じた時
点または要求の生じる以前に、基地局は、セル／セクタ
内での接続回線数を複数の周波数帯について測定してお
き、この測定値が最も小さい周波数帯を新たに設定する
無線回線の周波数帯として使用することができ、特定の
周波数帯における使用頻度に偏りが生じるのを未然に防
止する。As a result, the base station measures the number of connection lines in a cell / sector for a plurality of frequency bands at the time when a request for outgoing / incoming connection is made or before the request is made. The smallest frequency band can be used as the frequency band of a newly set wireless line, and uneven use frequencies in a specific frequency band can be prevented.
【００１０】また、請求項２記載の本発明は、基地局と
移動局との間の通信に複数の周波数帯を使用可能である
ＣＤＭＡ移動通信システムにおける周波数帯使用方法で
あって、基地局が周波数帯毎にセル／セクタ内での接続
回線数または移動局から基地局への上り干渉波受信レベ
ルまたは基地局から移動局への下り干渉波受信レベルを
逐次測定し、該測定値の最大値と最小値との差が第１の
所定値以上となった時点で、最大値を有する周波数帯で
通信する単数もしくは複数の移動局を最小値を有する周
波数帯にハンドオーバさせて、通信に使用する周波数帯
を最小値を有する周波数帯に切り替えることを要旨とす
る。The present invention according to claim 2 is a method of using a frequency band in a CDMA mobile communication system, wherein a plurality of frequency bands can be used for communication between a base station and a mobile station. The maximum number of the measured values is measured by sequentially measuring the number of connected lines in the cell / sector, the uplink interference wave reception level from the mobile station to the base station, or the downlink interference wave reception level from the base station to the mobile station for each frequency band. When the difference between the minimum value and the minimum value becomes equal to or larger than the first predetermined value, one or more mobile stations communicating in the frequency band having the maximum value are handed over to the frequency band having the minimum value and used for communication. The gist is to switch the frequency band to the frequency band having the minimum value.
【００１１】これにより、基地局は、周波数帯毎にセル
／セクタ内での接続回線数または上り干渉波受信レベル
または下り干渉波受信レベルを逐次測定し、この測定に
より得られた測定値の最大値と最小値との差が所定値以
上となった時点で、最大値を有する周波数帯で通信する
単数もしくは複数の移動局を測定値が最小値を有する周
波数帯にハンドオーバさせることにより、特定の周波数
帯における使用頻度の偏りを自律的に調整する。As a result, the base station sequentially measures the number of connected lines in each cell / sector, the uplink interference wave reception level or the downlink interference wave reception level for each frequency band, and the maximum of the measured values obtained by this measurement is obtained. When the difference between the value and the minimum value becomes a predetermined value or more, by handing over one or more mobile stations communicating in the frequency band having the maximum value to the frequency band having the minimum measurement value, The deviation of the frequency of use in the frequency band is adjusted autonomously.
【００１２】更に、請求項３記載の本発明は、請求項２
記載の発明において、基地局が、通信している移動局毎
に逐次上りまたは下りまたは双方向の無線回線の送信電
力を測定し、該測定値の最も大きい移動局もしくは該測
定値の大きい方から所定数の移動局を前記ハンドオーバ
させる移動局として選択することを要旨とする。Further, the present invention according to claim 3 provides the invention according to claim 2.
In the invention described, the base station sequentially measures the transmission power of the uplink or downlink or bidirectional wireless line for each mobile station with which it is communicating, from the mobile station having the largest measured value or the one having the largest measured value. The gist is to select a predetermined number of mobile stations as the mobile stations to be handed over.
【００１３】請求項４記載の本発明は、請求項１ないし
３記載の発明において、移動局が、下り干渉波受信レベ
ルもしくは上り送信電力を測定し、測定値を基地局に対
して上り無線回線で通知することを要旨とする。According to a fourth aspect of the present invention, in the invention according to the first to third aspects, the mobile station measures the downlink interference wave reception level or the uplink transmission power, and outputs the measured value to the base station in the uplink radio link. The point is to notify in.
【００１４】請求項５記載の本発明は、請求項２記載の
発明において、前記接続回線数または上り干渉波受信レ
ベルまたは下り干渉波受信レベルの前記測定値が所定の
値以上である場合、前記最大値と最小値との差が前記第
１の所定値よりも小さい第２の所定値以上となった時点
で、最大値を有する周波数帯で通信する移動局を最小値
を有する周波数帯にハンドオーバさせることを要旨とす
る。According to a fifth aspect of the present invention, in the invention according to the second aspect, when the measured value of the number of connection lines or the uplink interference wave reception level or the downlink interference wave reception level is a predetermined value or more, When the difference between the maximum value and the minimum value becomes equal to or larger than the second predetermined value that is smaller than the first predetermined value, the mobile station communicating in the frequency band having the maximum value is handed over to the frequency band having the minimum value. The main point is to do.
【００１５】また、請求項６記載の本発明は、基地局と
移動局との間の通信に複数の周波数帯を使用可能である
ＣＤＭＡ移動通信システムにおける周波数帯使用方法で
あって、基地局装置が、発着信接続の要求が生じた時点
またはそれ以前に、セル／セクタ内での接続回線数を複
数の周波数帯について測定する測定手段と、該測定手段
の測定値が最も小さい周波数帯を新たに設定する無線回
線の周波数帯として選択する周波数帯選択手段とを有す
ることを要旨とする。The present invention according to claim 6 is a method of using a frequency band in a CDMA mobile communication system, wherein a plurality of frequency bands can be used for communication between a base station and a mobile station. However, the measurement means for measuring the number of connected lines in a cell / sector in a plurality of frequency bands at or before the time when a request for an incoming / outgoing connection is made, and the measured value of the measurement means is the most The gist of the present invention is to have a frequency band selecting means for selecting a small frequency band as a frequency band of a wireless line to be newly set.
【００１６】更に、請求項７記載の本発明は、基地局と
移動局との間の通信に複数の周波数帯を使用可能である
ＣＤＭＡ移動通信システムにおける周波数帯使用方法で
あって、基地局装置が、周波数帯毎にセル／セクタ内で
の接続回線数または移動局から基地局への上り干渉波受
信レベルまたは基地局から移動局への下り干渉波受信レ
ベルを逐次測定する測定手段と、該測定手段の測定値の
最大値と最小値との差が第１の所定値以上となった時点
で、最大値を有する周波数帯で通信する単数もしくは複
数の移動局を最小値を有する周波数帯にハンドオーバさ
せて、通信に使用する周波数帯を最小値を有する周波数
帯に切り替えるハンドオーバ手段とを有することを要旨
とする。Further, the present invention according to claim 7 is a method for using a frequency band in a CDMA mobile communication system capable of using a plurality of frequency bands for communication between a base station and a mobile station, the base station device comprising: A measuring means for sequentially measuring the number of connection lines in a cell / sector, the uplink interference wave reception level from the mobile station to the base station, or the downlink interference wave reception level from the base station to the mobile station for each frequency band; When the difference between the maximum value and the minimum value of the measurement values of the measuring means becomes equal to or more than the first predetermined value, the mobile station or the plurality of mobile stations communicating in the frequency band having the maximum value is changed to the frequency band having the minimum value. The gist of the present invention is to have a handover means for performing a handover and switching a frequency band used for communication to a frequency band having a minimum value.
【００１７】請求項８記載の本発明は、請求項７記載の
発明において、基地局装置が、通信している移動局毎に
逐次上りまたは下りまたは双方向の無線回線の送信電力
を測定する送信電力測定手段を更に有し、前記ハンドオ
ーバ手段が、前記送信電力測定手段で測定した送信電力
の最も大きい移動局もしくは該測定値の大きい方から所
定数の移動局を前記ハンドオーバさせる移動局として選
択する選択手段を有することを要旨とする。According to an eighth aspect of the present invention, in the invention according to the seventh aspect, the base station device sequentially measures the transmission power of the uplink or downlink or bidirectional radio line for each mobile station with which communication is performed. The handover means further includes power measuring means, and the handover means selects a mobile station having the largest transmission power measured by the transmission power measuring means or a predetermined number of mobile stations from the larger measured value as the mobile stations to be handed over. The gist is to have a selection means.
【００１８】また、請求項９記載の本発明は、請求項６
または７または８記載の発明において、前記下り干渉波
受信レベルの測定手段が、該下り干渉波受信レベルを移
動局で測定させ、この測定値を移動局から基地局に上り
無線回線で送信させる手段を有することを要旨とする。The present invention according to claim 9 provides the invention according to claim 6.
Or in the invention described in 7 or 8, the means for measuring the downlink interference wave reception level causes the mobile station to measure the downlink interference wave reception level, and transmits the measured value from the mobile station to the base station via the uplink radio line. It is a gist to have.
【００１９】更に、請求項１０記載の本発明は、請求項
７記載の発明において、前記ハンドオーバ手段が、前記
接続回線数または上り干渉波受信レベルまたは下り干渉
波受信レベルの前記測定値が所定の値以上である場合、
前記最大値と最小値との差が前記第１の所定値よりも小
さい第２の所定値以上となった時点で、最大値を有する
周波数帯で通信する移動局を最小値を有する周波数帯に
ハンドオーバさせる手段を有することを要旨とする。Further, the present invention according to claim 10 is the invention according to claim 7, wherein the handover means determines the measured value of the number of connection lines or the received level of the upstream interference wave or the received level of the downstream interference wave to be a predetermined value. If it is greater than or equal to the value,
When the difference between the maximum value and the minimum value becomes equal to or larger than a second predetermined value that is smaller than the first predetermined value, the mobile station communicating in the frequency band having the maximum value is set to the frequency band having the minimum value. The gist is to have a means for handing over.
【００２０】[0020]
【発明の実施の形態】以下、図面を用いて本発明の実施
の形態について説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.
【００２１】図１および図２は、それぞれ本発明の一実
施形態に係るＣＤＭＡ移動通信システムにおける周波数
帯使用方法を実施する基地局装置および移動局装置の構
成を示すブロック図である。1 and 2 are block diagrams showing configurations of a base station apparatus and a mobile station apparatus, respectively, for implementing a frequency band using method in a CDMA mobile communication system according to an embodiment of the present invention.
【００２２】図１に示す基地局装置は、移動局からの無
線信号を受信するとともに移動局への無線信号を送信す
るアンテナ２１を有し、該アンテナ２１で受信した移動
局からの信号は送受分配回路２３、受信回路２５を介し
て復調回路２７に供給され、ここで拡散コードを用いた
逆拡散および通常の復調が行われる。復調された信号は
復号化回路２９に供給され、伝送信号と制御信号の復号
が行われ、制御信号は制御回路３１に供給され、伝送信
号は有線回線送信回路３９を介して上位の交換局に送信
される。The base station apparatus shown in FIG. 1 has an antenna 21 for receiving a radio signal from a mobile station and transmitting a radio signal to the mobile station, and the signal from the mobile station received by the antenna 21 is transmitted and received. The signal is supplied to the demodulation circuit 27 via the distribution circuit 23 and the reception circuit 25, where despreading using a spreading code and normal demodulation are performed. The demodulated signal is supplied to the decoding circuit 29, the transmission signal and the control signal are decoded, the control signal is supplied to the control circuit 31, and the transmission signal is sent to the higher-level switching center via the wire line transmission circuit 39. Sent.
【００２３】また、交換局から基地局への伝送信号は、
有線回線受信回路４１で受信され、伝送信号と制御信号
に分解され、制御信号は制御回路３１に供給され、伝送
信号は制御回路３１からの制御信号とともに符号化回路
３３で符号化され、変調回路３５で一次変調および拡散
コードによる拡散変調を施されてから、送信回路３７お
よび送受分配回路２３を介してアンテナ２１から移動局
に対して送信される。The transmission signal from the exchange to the base station is
It is received by the wired line receiving circuit 41, decomposed into a transmission signal and a control signal, the control signal is supplied to the control circuit 31, and the transmission signal is coded by the coding circuit 33 together with the control signal from the control circuit 31, and the modulation circuit After being subjected to primary modulation and spread modulation by a spread code at 35, the signal is transmitted from the antenna 21 to the mobile station via the transmission circuit 37 and the transmission / reception distribution circuit 23.
【００２４】また、受信回路２５と制御回路３１との間
に接続されている干渉波受信レベル測定回路５７は、セ
ル／セクタ内での上り干渉波受信レベルの測定を行い、
該測定値を制御回路３１に供給するものである。送信回
路３７と制御回路３１との間に接続されている送信電力
測定回路５９は、送信回路３７で送信されている無線回
路の送信電力を測定し、制御回路３１に該測定値を供給
するものである。制御回路３１は発着信接続の要求が生
じた時点またはそれ以前に、セル／セクタ内での接続回
線数を測定する機能も有し、更に制御回路３１は後述す
るように移動局で測定され、移動局から送信される下り
干渉波受信レベル測定値を受信する機能も有している。The interference wave reception level measuring circuit 57 connected between the reception circuit 25 and the control circuit 31 measures the uplink interference wave reception level in the cell / sector.
The measured value is supplied to the control circuit 31. The transmission power measurement circuit 59 connected between the transmission circuit 37 and the control circuit 31 measures the transmission power of the wireless circuit transmitted by the transmission circuit 37 and supplies the measured value to the control circuit 31. Is. The control circuit 31 also has a function of measuring the number of connection lines in the cell / sector at or before the time when the request for the outgoing / incoming connection is generated, and the control circuit 31 is measured by the mobile station as described later. It also has a function of receiving a downlink interference wave reception level measurement value transmitted from a mobile station.
【００２５】図２に示す移動局装置は、基地局からの無
線信号を受信するとともに基地局への無線信号を送信す
るアンテナ１を有し、該アンテナ１で受信した基地局か
らの信号は送受分配回路３、受信回路５を介して復調回
路７に供給され、ここで拡散コードを用いた逆拡散およ
び通常の復調が行われる。復調された信号は復号化回路
９に供給されて、伝送信号と制御信号の復号が行われ、
制御信号は制御回路１１に供給され、伝送信号はマンマ
シンインタフェースに供給される。The mobile station device shown in FIG. 2 has an antenna 1 for receiving a radio signal from a base station and transmitting a radio signal to the base station, and a signal from the base station received by the antenna 1 is transmitted and received. The signal is supplied to the demodulation circuit 7 via the distribution circuit 3 and the reception circuit 5, where despreading using a spreading code and normal demodulation are performed. The demodulated signal is supplied to the decoding circuit 9 to decode the transmission signal and the control signal,
The control signal is supplied to the control circuit 11, and the transmission signal is supplied to the man-machine interface.
【００２６】また、マンマシンインタフェースからの音
声信号などの伝送信号は、制御回路１１からの制御信号
とともに符号化回路１３に供給されて符号化され、変調
回路１５で一次変調および拡散コードによる拡散変調さ
れ、送信回路１７、送受分配回路３を介してアンテナ１
から基地局に対して送信される。A transmission signal such as a voice signal from the man-machine interface is supplied to the encoding circuit 13 together with the control signal from the control circuit 11 to be encoded, and the modulation circuit 15 performs the primary modulation and the spread modulation by the spreading code. Then, the antenna 1 is transmitted via the transmission circuit 17 and the transmission / reception distribution circuit 3.
From the base station to the base station.
【００２７】また、図２に示す移動局装置は受信回路５
と制御回路１１との間に干渉波受信レベル測定回路５３
が接続されているが、該干渉波受信レベル測定回路５３
は該移動局が基地局と通信中の周波数帯の下り干渉波受
信レベルを測定し、この測定値を制御回路１１に供給す
るものである。送信回路１７と制御回路１１との間に接
続されている送信電力測定回路５５は、送信回路１７で
送信されている無線回路の送信電力を測定し、制御回路
１１に該測定値を供給するものである。制御回路１１
は、この測定値を基地局に送信するようになっている。Further, the mobile station device shown in FIG.
And the control circuit 11 between the interference wave reception level measuring circuit 53
Is connected to the interference wave reception level measuring circuit 53.
Is for measuring the downlink interference wave reception level in the frequency band in which the mobile station is communicating with the base station and supplying the measured value to the control circuit 11. The transmission power measurement circuit 55 connected between the transmission circuit 17 and the control circuit 11 measures the transmission power of the wireless circuit transmitted by the transmission circuit 17 and supplies the measured value to the control circuit 11. Is. Control circuit 11
Is adapted to send this measurement to the base station.
【００２８】以上のように構成される基地局装置および
移動局装置を有する本実施形態のＣＤＭＡ移動通信シス
テムにおいては、基地局と移動局との通信に複数の周波
数帯を使用することができるものであり、この複数の周
波数帯を均一に使用し得るように制御するために、基地
局は、発着信接続の要求が生じた時点またはそれ以前に
おいて、セル／セクタ内での移動局から基地局への上り
干渉波受信レベルを干渉波受信レベル測定回路５７によ
って測定するようになっている。そして、新たに無線回
線を設定しようとする場合には、該無線回線の周波数帯
として、干渉波受信レベル測定回路５７で測定した上り
干渉波受信レベルが最も小さい周波数帯を制御回路３１
で選択する。In the CDMA mobile communication system of the present embodiment having the base station apparatus and the mobile station apparatus configured as described above, a plurality of frequency bands can be used for communication between the base station and the mobile station. In order to control the plurality of frequency bands so that they can be used uniformly, at the time when a request for an incoming / outgoing connection is made, or before, the base station moves from the mobile station in the cell / sector to the base station. The interference wave reception level measuring circuit 57 measures the reception level of the upstream interference wave. When a new wireless line is to be set up, the frequency band of the wireless line is set to the frequency band having the smallest up-link interference wave reception level measured by the interference wave reception level measuring circuit 57.
Select with.
【００２９】このように上り干渉波受信レベルが最も小
さい周波数帯を選択することにより、周波数帯の使用頻
度の偏りを均一にすることができる。すなわち、使用頻
度が少ない周波数帯は干渉波受信レベルが小さいので、
この干渉波受信レベルの小さい周波数帯を選択すること
により、周波数帯に対する使用頻度の偏りを低減し、均
一にすることができる。As described above, by selecting the frequency band having the smallest reception level of the upstream interference wave, it is possible to make the usage frequency of the frequency bands uniform. That is, since the interference wave reception level is low in the frequency band that is rarely used,
By selecting a frequency band in which the interference wave reception level is low, it is possible to reduce and even out the bias in the frequency of use with respect to the frequency band.
【００３０】他の実施形態では、上り干渉波受信レベル
の代わりに、基地局から移動局への下り干渉波受信レベ
ルを使用することができる。この下り干渉波受信レベル
は、図２に示す移動局の干渉波受信レベル測定回路５３
で複数の周波数帯について測定され、この測定値を制御
回路１１の制御により基地局に送信するようになってい
る。基地局は、この複数の周波数帯の下り干渉波受信レ
ベルの測定値を受信すると、この複数の測定値のうち該
測定値が最も小さい周波数帯を新たに設定しようとする
無線回線の周波数帯として選択し、これにより周波数帯
の使用頻度を均一にしている。In another embodiment, the downlink interference wave reception level from the base station to the mobile station can be used instead of the uplink interference wave reception level. This downlink interference wave reception level is the interference wave reception level measuring circuit 53 of the mobile station shown in FIG.
Are measured for a plurality of frequency bands, and the measured values are transmitted to the base station under the control of the control circuit 11. When the base station receives the measured values of the downlink interference wave reception levels of the plurality of frequency bands, the frequency band having the smallest measured value among the plurality of measured values is set as the frequency band of the wireless line to be newly set. The frequency band is used evenly by this selection.
【００３１】更に他の実施形態では、上述した上り干渉
波受信レベルおよび下り干渉波受信レベルの代わりに、
接続回線数を使用することができる。基地局は、制御回
路３１により複数の移動局との間の接続回線数を測定
し、この測定値が最も小さい周波数帯を、新たに設定し
ようとする無線回線の周波数帯として選択し、これによ
り周波数帯の使用頻度を均一にしている。In still another embodiment, instead of the above-mentioned uplink interference wave reception level and downlink interference wave reception level,
The number of connection lines can be used. The base station measures the number of connection lines with a plurality of mobile stations by the control circuit 31 and selects the frequency band with the smallest measured value as the frequency band of the wireless line to be newly set. The frequency band is used evenly.
【００３２】別の実施形態では、上述したセル／セクタ
内での上り干渉波受信レベル、下り干渉波受信レベル、
または接続回線数の測定を上述したように周波数帯毎に
逐次行い、この測定値の最大値と最小値との差が第１の
所定値Ａ以上となった時点で、最大値を有する周波数帯
で通信する移動局を最小値を有する周波数帯にハンドオ
ーバ、すなわち異周波ハンドオーバさせ、通信に使用す
る周波数帯を最小値を有する周波数帯に切り替え、これ
により周波数帯の使用頻度を均一にしている。In another embodiment, the reception level of the uplink interference wave, the reception level of the downlink interference wave in the above-mentioned cell / sector,
Alternatively, the number of connected lines is sequentially measured for each frequency band as described above, and when the difference between the maximum value and the minimum value of the measured values becomes the first predetermined value A or more, the frequency band having the maximum value is obtained. The mobile station that communicates with is handed over to the frequency band having the minimum value, that is, different frequency handover, and the frequency band used for communication is switched to the frequency band having the minimum value, thereby making the frequency band usage frequency uniform.
【００３３】測定値の最大値と最小値との差は周波数帯
の使用頻度の偏りを示すものであり、この差が第１の所
定値Ａ以上になったということは、周波数帯の使用頻度
にかなりの偏りが発生したということであるので、この
ような場合に測定値が最小の周波数帯にハンドオーバさ
せることにより周波数帯の使用頻度を均一にすることが
できる。The difference between the maximum value and the minimum value of the measured values indicates the bias of the frequency of use of the frequency band, and the fact that this difference exceeds the first predetermined value A means that the frequency of use of the frequency band is used. Since there is a considerable bias in the frequency band, in such a case, the frequency band can be used uniformly by handing over to the frequency band with the minimum measured value.
【００３４】なお、この実施形態では、通信中に常に測
定し、この測定結果に基づき使用頻度に偏りがある場合
には、強制的にハンドオーバするように制御している。In this embodiment, the measurement is always performed during the communication, and if the usage frequency is biased based on the measurement result, the handover is forcibly controlled.
【００３５】更に別の実施形態では、上述した実施形態
においてハンドオーバさせる移動局を送信電力が最も大
きい単数もしくは複数の移動局とし、これにより通信品
質の劣化が発生する確率を低減しようとするものであ
る。In still another embodiment, the mobile station to be handed over in the above-described embodiment is set to a mobile station or a plurality of mobile stations having the highest transmission power, thereby reducing the probability of deterioration of communication quality. is there.
【００３６】すなわち、本実施形態では、基地局は、通
信している移動局毎に、送信電力測定回路５９で逐次、
下りの送信電力を測定し、移動局は送信電力測定回路５
５で逐次上りの送信電力を測定して基地局に対して該測
定値を通知し、基地局は上りまたは下りまたは双方向の
測定値のうち最も送信電力の大きい移動局もしくは該測
定値の大きい方から所定数の移動局を前記ハンドオーバ
させる移動局として選択するものである。That is, in the present embodiment, the base station sequentially uses the transmission power measuring circuit 59 for each mobile station with which it is communicating.
The mobile station measures the downlink transmission power and the transmission power measuring circuit 5
In step 5, the uplink transmission power is sequentially measured and the measured value is notified to the base station. The base station has the largest transmission power among the uplink, downlink, or bidirectional measurement values or the measurement value is large. The mobile station selects a predetermined number of mobile stations as the mobile station to be handed over.
【００３７】送信電力が最も大きい無線回線は、送信電
力の最大値に達することによる通信品質の劣化の恐れが
一番高い。そこで、干渉波受信レベルの最も小さい周波
数帯にハンドオーバさせることにより、送信電力の低減
を図ることができ、通信品質の劣化が発生する確率を低
減することができる。The wireless line with the highest transmission power is most likely to deteriorate the communication quality due to the maximum value of the transmission power. Therefore, the transmission power can be reduced by performing the handover to the frequency band having the smallest reception level of the interference wave, and the probability of deterioration of communication quality can be reduced.
【００３８】また別の実施形態では、上述した実施形態
において前記上り干渉波受信レベル、下り干渉波受信レ
ベル、または接続回線数の測定値が無線回線の容量限界
に近い値にほぼ等しい所定の値Ｘ以上である場合、各測
定値における最大値と最小値との差が前記第１の所定値
Ａよりも小さい第２の所定値Ｂ以上となった時点で、前
記最大値を有する周波数帯で通信する移動局を最小値を
有する周波数帯にハンドオーバさせている。[0038] In another embodiment, in the above-mentioned embodiment, the measured value of the uplink interference wave reception level, the downlink interference wave reception level, or the number of connected lines is a predetermined value which is approximately equal to a value close to the capacity limit of the wireless line. When it is X or more, at the time when the difference between the maximum value and the minimum value in each measured value becomes the second predetermined value B which is smaller than the first predetermined value A or more, in the frequency band having the maximum value. The communicating mobile station is handed over to the frequency band having the minimum value.
【００３９】このように無線回線容量の限界に近づいて
いる周波数帯に対しては、ハンドオーバの起動判定値を
小さくして、移動局のハンドオーバを起動しやすくする
ことにより、特定の周波数帯が容量オーバとなることを
防止することができ、これにより他セル／セクタからの
同周波ハンドオーバが不可能となる頻度を減らして、無
線回線容量を増大させることができる。As described above, with respect to the frequency band approaching the limit of the radio channel capacity, the handover activation determination value is reduced to facilitate the activation of the handover of the mobile station, so that the specific frequency band is limited in capacity. It is possible to prevent overrunning, which reduces the frequency of inability to perform the same frequency handover from other cells / sectors and increases the wireless line capacity.
【００４０】[0040]
【発明の効果】以上説明したように、本発明によれば、
基地局において発着信接続の要求が生じた時点またはそ
れ以前に、セル／セクタ内での接続回線数または上り干
渉波受信レベルまたは下り干渉波受信レベルを複数の周
波数帯について測定し、測定値が最も小さい周波数帯
を、新たに設定する無線回線の周波数帯として使用する
ことにより、周波数帯毎の使用頻度の偏りを低減するこ
とができ、無線回線容量上およびサービス提供上の問題
を解消することができる。As described above, according to the present invention,
The number of connected lines in the cell / sector or the uplink interference wave reception level or downlink interference wave reception level is measured for a plurality of frequency bands at or before the request for outgoing / incoming connection at the base station, and the measured value is By using the smallest frequency band as the frequency band of a newly set wireless line, it is possible to reduce the bias in the frequency of use for each frequency band, and solve problems in terms of wireless line capacity and service provision. You can
【００４１】また、本発明によれば、基地局において周
波数帯毎にセル／セクタ内での接続回線数または上り干
渉波受信レベルまたは下り干渉波受信レベルを逐次測定
し、該測定値の最大値と最小値との差が第１の所定値以
上となった時点で、最大値を有する周波数帯で通信する
移動局を最小値を有する周波数帯にハンドオーバさせ
て、通信に使用する周波数帯を最小値を有する周波数帯
に切り替えることにより、周波数帯毎の使用頻度の偏り
を低減することができ、無線回線容量上およびサービス
提供上の問題を解消することができる。Further, according to the present invention, the number of connected lines in the cell / sector or the uplink interference wave reception level or the downlink interference wave reception level is sequentially measured for each frequency band in the base station, and the maximum value of the measured values is obtained. When the difference between the minimum value and the minimum value becomes equal to or larger than the first predetermined value, the mobile station communicating in the frequency band having the maximum value is handed over to the frequency band having the minimum value to minimize the frequency band used for communication. By switching to a frequency band having a value, it is possible to reduce the bias in the frequency of use for each frequency band, and it is possible to solve the problems in terms of wireless line capacity and service provision.
【００４２】更に、本発明によれば、送信電力が最も大
きい移動局をハンドオーバさせることにより、送信電力
の低減を図ることができ、送信電力が最大値に達するこ
とによる通信品質の劣化の発生確率を低減することがで
きる。Further, according to the present invention, the transmission power can be reduced by handing over the mobile station having the largest transmission power, and the probability of occurrence of deterioration of communication quality due to the transmission power reaching the maximum value. Can be reduced.
【００４３】また、本発明によれば、接続回線数または
上り干渉波受信レベルまたは下り干渉波受信レベルの測
定値が例えば無線回線の容量限界に近い値にほぼ等しい
所定の値以上である場合、該測定値の最大値と最小値と
の差が前記第１の所定値よりも小さい第２の所定値以上
となった時点で、最大値を有する周波数帯で通信する移
動局を最小値を有する周波数帯にハンドオーバさせるこ
とにより、無線回線容量の限界に近づいている周波数帯
に対してはハンドオーバの起動判定値を小さくして、移
動局のハンドオーバを起動しやすくすることができ、特
定の周波数帯が容量オーバとなることを防止することが
でき、これにより他セル／セクタからの同周波ハンドオ
ーバが不可能となる頻度を減らして、無線回線容量を増
大させることができる。Further, according to the present invention, when the measured value of the number of connected lines or the received level of the upstream interference wave or the received level of the downstream interference wave is equal to or more than a predetermined value which is approximately equal to a value close to the capacity limit of the wireless line, for example, When the difference between the maximum value and the minimum value of the measured values becomes equal to or more than the second predetermined value smaller than the first predetermined value, the mobile station communicating in the frequency band having the maximum value has the minimum value. By performing handover to a frequency band, it is possible to reduce the handover activation determination value for a frequency band approaching the limit of wireless channel capacity, making it easier to activate a mobile station handover. Can be prevented from over-capacity, which can reduce the frequency of in-frequency handover from other cells / sectors becoming impossible and increase the wireless channel capacity. That.
【図１】本発明の一実施形態に係るＣＤＭＡ移動通信シ
ステムにおける周波数帯使用方法を実施する基地局装置
の構成を示すブロック図である。FIG. 1 is a block diagram showing a configuration of a base station apparatus that implements a frequency band using method in a CDMA mobile communication system according to an embodiment of the present invention.
【図２】本発明の一実施形態に係るＣＤＭＡ移動通信シ
ステムにおける周波数帯使用方法を図１の基地局装置と
ともに実施する移動局装置の構成を示すブロック図であ
る。FIG. 2 is a block diagram showing a configuration of a mobile station apparatus that implements the frequency band using method in the CDMA mobile communication system according to the embodiment of the present invention together with the base station apparatus of FIG.
１，２１ アンテナ ３，２３ 送受分配回路 ５，２５ 受信回路 ７，２７ 復調回路 ９，２９ 復号化回路 １１，３１ 制御回路 １３，３３ 符号化回路 １５，３５ 変調回路 １７，３７ 送信回路 ５１ 記憶回路 ５３，５７ 干渉波受信レベル測定回路 ５５，５９ 送信電力測定回路 1,21 antenna 3,23 Transmission / reception distribution circuit 5,25 receiver circuit 7,27 Demodulation circuit 9,29 Decoding circuit 11,31 Control circuit 13,33 Encoding circuit 15,35 Modulation circuit 17,37 Transmitter circuit 51 memory circuit 53,57 Interference wave reception level measurement circuit 55,59 Transmit power measurement circuit
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平６−334630（ＪＰ，Ａ) 特開 平７−336751（ＪＰ，Ａ) 特開 平８−19053（ＪＰ，Ａ) 国際公開96／484（ＷＯ，Ａ１) 国際公開96／2980（ＷＯ，Ａ１) (58)調査した分野(Int.Cl.7，ＤＢ名) H04J 13/00 H04B 7/26 H04Q 7/22 - 7/38 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-334630 (JP, A) JP-A-7-336751 (JP, A) JP-A-8-19053 (JP, A) International Publication 96/484 (WO, A1) International Publication 96/2980 (WO, A1) (58) Fields investigated (Int.Cl. 7 , DB name) H04J 13/00 H04B 7/26 H04Q 7/22-7/38
Claims (10)
波数帯を使用可能であるＣＤＭＡ移動通信システムにお
ける周波数帯使用方法であって、 基地局は、周波数帯毎にセル／セクタ内での接続回線数
または移動局から基地局への上り干渉波受信レベルを逐
次測定し、該測定値の最大値と最小値との差が第１の所
定値以上となった時点で、最大値を有する周波数帯で通
信する単数もしくは複数の移動局を最小値を有する周波
数帯にハンドオーバさせて、通信に使用する周波数帯を
最小値を有する周波数帯に切り替えることを特徴とする
ＣＤＭＡ移動通信システムにおける周波数帯使用方法。1. A method of using a frequency band in a CDMA mobile communication system capable of using a plurality of frequency bands for communication between a base station and a mobile station, wherein the base station is within a cell / sector for each frequency band. uplink interference wave reception level from the connection line number or the mobile station to the base station by successive approximation <br/> following measured at the difference between the maximum value and the minimum value of the measured value becomes a first predetermined value or more At this point, one or more mobile stations communicating in the frequency band having the maximum value are handed over to the frequency band having the minimum value, and the frequency band used for communication is switched to the frequency band having the minimum value. A frequency band usage method in a CDMA mobile communication system.
波数帯を使用可能であるＣＤＭＡ移動通信システムにお
ける周波数帯使用方法であって、 基地局は、移動局で逐次測定した基地局から移動局への
下り干渉波受信レベルを受信し、 該受信した下り干渉波受信レベルの 最大値と最小値との
差が第１の所定値以上となった時点で、最大値を有する
周波数帯で通信する単数もしくは複数の移動局を最小値
を有する周波数帯にハンドオーバさせて、通信に使用す
る周波数帯を最小値を有する周波数帯に切り替えること
を特徴とするＣＤＭＡ移動通信システムにおける周波数
帯使用方法。2. A method of using a frequency band in a CDMA mobile communication system, wherein a plurality of frequency bands can be used for communication between a base station and a mobile station, wherein the base station is a base station which is sequentially measured by the mobile station. From the mobile station
When a downlink interference wave reception level is received and a difference between the maximum value and the minimum value of the received downlink interference wave reception level becomes equal to or larger than a first predetermined value, a single or a frequency band having the maximum value is used for communication. A method of using a frequency band in a CDMA mobile communication system, characterized in that a plurality of mobile stations are handed over to a frequency band having a minimum value and a frequency band used for communication is switched to a frequency band having a minimum value.
または下りまたは双方向の無線回線の送信電力の最も大
きい移動局もしくは該送信電力の大きい方から所定数の
移動局を前記ハンドオーバさせる移動局として選択する
ことを特徴とする請求項１又は２記載のＣＤＭＡ移動通
信システムにおける周波数帯使用方法。3. The base station handovers a mobile station having the highest transmission power of an uplink or downlink or a bidirectional wireless channel for each mobile station with which it is communicating or a predetermined number of mobile stations from the transmission power having the highest transmission power. frequency band usage in a CDMA mobile communication system according to claim 1 or 2, wherein the selecting a mobile station to be.
は上り送信電力を測定し、測定値を基地局に対して上り
無線回線で通知することを特徴とする請求項２又は３記
載のＣＤＭＡ移動通信システムにおける周波数帯使用方
法。4. The CDMA mobile according to claim 2 , wherein the mobile station measures the downlink interference wave reception level or the uplink transmission power and notifies the base station of the measurement value via the uplink radio channel. Frequency band usage in communication systems.
ベルまたは下り干渉波受信レベルが所定の値以上である
場合、前記最大値と最小値との差が前記第１の所定値よ
りも小さい第２の所定値以上となった時点で、最大値を
有する周波数帯で通信する移動局を最小値を有する周波
数帯にハンドオーバさせることを特徴とする請求項１又
は２記載のＣＤＭＡ移動通信システムにおける周波数帯
使用方法。5. When the number of connection lines or the reception level of the uplink interference wave or the reception level of the downlink interference wave is equal to or more than a predetermined value, the difference between the maximum value and the minimum value is smaller than the first predetermined value. when it becomes the second predetermined value or more, and claim 1, characterized in that performing a handover of the mobile station communicating in the frequency band having the maximum value in the frequency band having the minimum value
Is a method of using a frequency band in the CDMA mobile communication system according to 2.
波数帯を使用可能であるＣＤＭＡ移動通信システムにお
ける基地局装置であって、 周波数帯毎にセル／セクタ内での移動局から基地局への
上り干渉波受信レベルを逐次測定する干渉波受信レベル
測定手段と、前記干渉波受信レベル 測定手段の測定値の最大値と最小
値との差が第１の所定値以上となった時点で、最大値を
有する周波数帯で通信する単数もしくは複数の移動局を
最小値を有する周波数帯にハンドオーバさせて、通信に
使用する周波数帯を最小値を有する周波数帯に切り替え
る制御手段とを有することを特徴とする基地局装置。6. A base station apparatus in a CDMA mobile communication system capable of using a plurality of frequency bands for communication between a base station and a mobile station, comprising: from a mobile station within a cell / sector for each frequency band. To the base station
An interference wave reception level <br/> measuring means for sequentially measuring the uplink interference wave reception level, the difference between the maximum value and the minimum value of the measured values of the interference wave reception level measuring means becomes a first predetermined value or more And a control means for handing over one or a plurality of mobile stations communicating in the frequency band having the maximum value to the frequency band having the minimum value and switching the frequency band used for communication to the frequency band having the minimum value. A base station device characterized by the above.
波数帯を使用可能であるＣＤＭＡ移動通信システムにお
ける基地局装置であって、 周波数帯毎にセル／セクタ内での接続回線数を逐次測定
し、その測定値の最大値と最小値との差が第１の所定値
以上となった時点で、最大値を有する周波数帯で通信す
る単数もしくは複数の移動局を最小値を有する周波数帯
にハンドオーバさせて、通信に使用する周波数帯を最小
値を有する周波数帯に切り替える制御手段を有すること
を特徴とする基地局装置。7. A base station apparatus in a CDMA mobile communication system capable of using a plurality of frequency bands for communication between a base station and a mobile station, wherein the number of connection lines in a cell / sector is for each frequency band. measured sequentially
Then, when the difference between the maximum value and the minimum value of the measured values becomes equal to or more than the first predetermined value, one or a plurality of mobile stations communicating in the frequency band having the maximum value are set to the frequency band having the minimum value. A base station apparatus comprising: a control unit that performs a handover and switches a frequency band used for communication to a frequency band having a minimum value.
波数帯を使用可能であるＣＤＭＡ移動通信システムにお
ける基地局装置であって、 周波数帯毎にセル／セクタ内での基地局から移動局への
下り干渉波受信レベルを前記移動局で逐次測定した結果
を受信する受信手段と、前記受信手段で受信した前記下り干渉波受信レベルの 測
定値の最大値と最小値との差が第１の所定値以上となっ
た時点で、最大値を有する周波数帯で通信する単数もし
くは複数の移動局を最小値を有する周波数帯にハンドオ
ーバさせて、通信に使用する周波数帯を最小値を有する
周波数帯に切り替える制御手段とを有することを特徴と
する基地局装置。8. A base station apparatus in a CDMA mobile communication system can be used a plurality of frequency bands for communication between the base station and the mobile station, from a base station in a cell / sector for each frequency band To mobile station
Results of successive measurement of downlink interference wave reception level at the mobile station
At the time when the difference between the maximum value and the minimum value of the measured values of the downlink interference wave reception level received by the receiving means and the receiving means for receiving the maximum value becomes equal to or more than a first predetermined value. Control means for handing over one or a plurality of mobile stations communicating in the frequency band having the minimum frequency band having the minimum value and switching the frequency band used for communication to the frequency band having the minimum value. Base station device.
逐次下り無線回線の送信電力を測定する送信電力測定手
段を更に有し、前記制御手段 は、前記送信電力測定手段で測定した送信
電力の最も大きい移動局もしくは該測定値の大きい方か
ら所定数の移動局を前記ハンドオーバさせる移動局とし
て選択することを特徴とする請求項６乃至８のいずれか
１項に記載の基地局装置。9. The base station apparatus further comprises transmission power measuring means for sequentially measuring transmission power of a downlink radio line for each mobile station with which communication is performed, and the control means measures with the transmission power measuring means. 9. The mobile station having the highest transmission power or a predetermined number of mobile stations selected from the one having the largest measured value as the mobile stations to be handed over, according to any one of claims 6 to 8.
The base station device according to item 1 .
は上り干渉波受信レベルまたは下り干渉波受信レベルが
所定の値以上である場合、前記最大値と最小値との差が
前記第１の所定値よりも小さい第２の所定値以上となっ
た時点で、最大値を有する周波数帯で通信する移動局を
最小値を有する周波数帯にハンドオーバさせる手段を有
することを特徴とする請求項６乃至８のいずれか１項に
記載の基地局装置。10. The control means, when the number of connection lines or the uplink interference wave reception level or the downlink interference wave reception level is a predetermined value or more, the difference between the maximum value and the minimum value is the A means for handing over a mobile station communicating in a frequency band having a maximum value to a frequency band having a minimum value at a time point when the second predetermined value, which is smaller than the first predetermined value, is reached. Item 9. The base station device according to any one of items 6 to 8 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17669296A JP3484017B2 (en) | 1996-07-05 | 1996-07-05 | Frequency band use method and base station apparatus in CDMA mobile communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17669296A JP3484017B2 (en) | 1996-07-05 | 1996-07-05 | Frequency band use method and base station apparatus in CDMA mobile communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1023502A JPH1023502A (en) | 1998-01-23 |
| JP3484017B2 true JP3484017B2 (en) | 2004-01-06 |
Family
ID=16018076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17669296A Expired - Lifetime JP3484017B2 (en) | 1996-07-05 | 1996-07-05 | Frequency band use method and base station apparatus in CDMA mobile communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3484017B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3116895B2 (en) | 1998-03-30 | 2000-12-11 | 日本電気株式会社 | IS-95 base station, W-CDMA base station, mobile communication system, and frequency sharing method |
| JP3031340B2 (en) | 1998-07-24 | 2000-04-10 | 日本電気株式会社 | CDMA base station apparatus, CDMA communication system, and communication line connection control method in CDMA communication system |
| US6546252B1 (en) * | 1998-12-18 | 2003-04-08 | Telefonaktiebolaget Lm Ericsson (Publ) | System and method for estimating interfrequency measurements used for radio network function |
| KR100658117B1 (en) * | 1999-05-04 | 2006-12-14 | 에스케이 텔레콤주식회사 | Apparatus and method for managing frequency allocation capacity in code division multiple access communication system |
| JP4041662B2 (en) | 2001-06-22 | 2008-01-30 | 株式会社エヌ・ティ・ティ・ドコモ | Wireless communication system, wireless communication method, wireless relay device, and wireless terminal |
| JP4287604B2 (en) | 2001-08-27 | 2009-07-01 | 富士通株式会社 | Mobile communication system, radio base station, radio apparatus and mobile terminal |
| US9578515B2 (en) | 2011-05-13 | 2017-02-21 | Qualcomm Incorporated | Methods and apparatuses for frequency spectrum sharing |
-
1996
- 1996-07-05 JP JP17669296A patent/JP3484017B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1023502A (en) | 1998-01-23 |
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