JP2001095031A - Mobile communication terminal - Google Patents

Mobile communication terminal

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Publication number
JP2001095031A
JP2001095031A JP27053699A JP27053699A JP2001095031A JP 2001095031 A JP2001095031 A JP 2001095031A JP 27053699 A JP27053699 A JP 27053699A JP 27053699 A JP27053699 A JP 27053699A JP 2001095031 A JP2001095031 A JP 2001095031A
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Japan
Prior art keywords
switching
communication
radio frequency
transmission power
immediately
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Japanese (ja)
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Haruyoshi Sakaguchi
晴良 坂口
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Toshiba Corp
株式会社東芝
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Priority to JP27053699A priority Critical patent/JP2001095031A/en
Publication of JP2001095031A publication Critical patent/JP2001095031A/en
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Abstract

PROBLEM TO BE SOLVED: To always restart communication with optimal transmitting power, when communication with an original vase station is restarted after measurement of reception quality of the adjacent base station is completed, thus to prevent generation of interference and line disconnection as a result and to hold communication quality after the communication is restarted as well.
SOLUTION: When communication with the original base station BSa is restated, after the measurement of reception quality of the adjacent base station BSb, the last transmission power value, received electric field intensity and time immediately before switching are stored and received electric field intensity and time immediately after recovery of switching are stored. Than the size relation between the received electric field intensity immediately before switching and one immediately after the recovery of switching is determined, time required for measurement is calculated from the time immediately before switching and the time immediately after the recovery of switching, omitted frequency of transmission power control during the measurement period is obtained, correction quantity of transmission power is calculated based on the missing control frequency of transmission power, a transmission power value decided based on the correction quantity and a determination result of the size relation and the communication is restarted.
COPYRIGHT: (C)2001,JPO

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】この発明は、セルラ移動通信システムで使用される移動通信端末装置に係わり、特に異周波数間ハンドオーバ機能を備えた移動通信端末装置に関する。 TECHNICAL FIELD The present invention relates to a mobile communication terminal apparatus used in a cellular mobile communication system, especially a mobile communication terminal device equipped with inter-frequency handover function.

【0002】 [0002]

【従来の技術】例えば、無線アクセス方式として符号分割多元接続(CDMA:Code Division Multiple Acces BACKGROUND ART For example, code division multiple access system as a radio access system (CDMA: Code Division Multiple Acces
s)方式を採用したセルラ移動通信システムは、サービスエリアに多数の基地局を分散配置してこれらの基地局によりセル又はセクタと呼ばれる無線エリアをそれぞれ形成し、移動局を当該移動局が存在するセル又はセクタの基地局に無線チャネルを介して接続することにより無線通信を可能にしている。 s) cellular mobile communication system employing the method, and distributed a number of base stations in the service area are respectively formed a radio areas called cells or sectors by these base stations, the mobile station is present the mobile station which enables wireless communication by connecting via a radio channel to the base station of the cell or sector. また、移動局が通信中に他のセル又はセクタへ移動した場合には、ハンドオーバを行うことにより通信を継続できるようにしている。 Further, when the mobile station moves to another cell or sector during communication is to be able to continue communication by performing a handover.

【0003】ハンドオーバには、移動局が同一の無線周波数が割り当てられたセル又はセクタ間を移動する際に行われる同一周波数間のハンドオーバと、移動局が異なる無線周波数が割り当てられたセル又はセクタ間を移動する際に行われる異周波数間のハンドオーバとがある。 [0003] handover, a handover between the same frequency which the mobile station is performed when moving between the same radio frequency is assigned cell or sector, the mobile station between different radio frequencies are assigned cell or sector there is a handover between different frequencies is carried out when moving.

【0004】このうち異周波数間のハンドオーバは、例えば次のように行われる。 [0004] Handover between these different frequencies is carried out, for example, as follows. 図6及び図7はその動作を説明するための図である。 6 and 7 are views for explaining the operation. すなわち、いま仮に移動局MS In other words, now if the mobile station MS
が通信中に図6に示すセルA内の地点P1からセルB内の地点P3に移動する途中で、セルA,Bの境界付近P There in the course of movement from the point P1 in the cell A shown in FIG. 6 during communication to the point P3 in the cell B, cell A, near the boundary between B P
2に到達したとする。 And it has reached the 2. そうするとセルAを形成する基地局BSaは、移動局MSにおける受信電界強度の低下を検出すると、先ず候補テーブルからハンドオーバ先として適当な基地局、つまりセルAと同一周波数が割り当てられた隣接基地局の候補を検索する。 Then the base station BSa forming the cell A detects the drop in received signal strength at the mobile station MS, first suitable base station as a handover destination from the candidate table, that the neighbor base stations the cell A the same frequency allocated Search for candidates. そして、適当な基地局が見付かれば、この基地局との間で同一周波数間のハンドオーバ制御を実行する。 Then, if it finds an appropriate base station, performing handover control between the same frequency between the base station.

【0005】これに対し適当な基地局が見付からなかった場合には、基地局BSaは異周波数間ハンドオーバを実行するべく、先ず移動局MSに対し指示メッセージを送出して、候補となり得る無線周波数の探索を指示する。 [0005] When the contrast appropriate base station is not found, the base station BSa is in order to execute a handover between different frequencies, first to the mobile station MS by sending an indication message, a radio frequency that can be a candidate to direct the search. 上記指示メッセージを受信すると移動局MSは、図7に示すように時刻T2で、基地局BSaとの間の通信を一時中断して、無線周波数を通信中のF1から探索対象の隣接基地局BSbの無線周波数F2に切り替え、この無線周波数F2により受信されるパイロット信号の受信電界強度を測定する。 Mobile station MS and receives the instruction message, at time T2 as shown in FIG. 7, to suspend communication with the base station BSa, the search target of the neighbor base station BSb from F1 of communicating radio frequency switching of the radio frequency F2, measures the reception field strength of the pilot signal received by the radio frequency F2. そして、この無線周波数F2の受信電界強度の測定を終了すると、その測定値を基地局BSbに通知したのち、無線周波数を元の無線周波数F Then, upon completion of the measurement of the reception field intensity of the radio frequency F2, After notifying the measured value to the base station BSb, of the original radio frequency radio frequency F
1に切替え、この状態で基地局BSaとの間の通信条件が満足すると通信を再開する。 Switched to 1, resume communication with the communication conditions between the base station BSa in this state is satisfied.

【0006】なお、通信条件を満足するか否かの判定は、例えば基地局BSaから移動局MSに向かう下りチャネルにおいて、12フレーム分に相当する期間(24 [0006] The determination of whether to satisfy the communication condition, for example, in the downlink channel towards the mobile station MS from the base station BSa, the period corresponding to 12 frames (24
0msec)に良好な2フレームを受信できたか否かにより行われる。 It is performed by whether or not received a good two frames 0 msec).

【0007】かくして、異周波数間ハンドオーバの準備は終了し、この状態で基地局BSaから基地局BSbへのハンドオーバ指示が到来すると、以後移動局MSの接続先を基地局BSaから基地局BSbへ切り替える異周波数間ハンドオーバ制御が行われる。 [0007] Thus, preparation of the inter-frequency handover is completed and the handover command to the base station BSb arrives from the base station BSa In this state, switches the connection destination of the subsequent mobile station MS from the base station BSa to the base station BSb inter-frequency handover control is performed.

【0008】 [0008]

【発明が解決しようとする課題】ところが、このような従来のハンドオーバ制御方式には次のような改善すべき課題があった。 [SUMMARY OF THE INVENTION However, a problem to be improved as follows in such a conventional handover control method. すなわち、無線周波数を通信中の基地局BSaの無線周波数F1から隣接基地局BSbの無線周波数F2に切り替えてその受信電界強度を測定する際に、移動局MSは無線周波数をF1からF2へ切り替える直前(T2)の通信パラメータを記憶する。 That is, immediately before switching to switch from the radio frequency F1 of the base station BSa of the communicating radio frequency to a radio frequency F2 of the adjacent base station BSb in measuring the received field strength, the mobile station MS is radio frequency from F1 to F2 storing communication parameters (T2). そして、 And,
測定を終了して無線周波数をF2からF1に戻し、時刻T3で元の基地局BSaとの間の通信を再開する際に、 Quit measured return the radio frequency from F2 to F1, when resuming the communication between the original base station BSa at time T3,
上記記憶した通信パラメータをそのまま使用して通信を再開するようにしている。 And so as to resume the communication accept the communication parameters the storage.

【0009】しかし、上記測定期間中に例えば移動局がさらに移動したり、無線伝送路環境が変化すると、通信再開直後の実際の通信パラメータは測定直前に記憶した通信パラメータに対し大きく変化し、その結果通信再開直後の通信品質が著しく劣化することがある。 [0009] However, moving during the measurement period for example the mobile station Furthermore, when the wireless channel environment is changed, actual communication parameters immediately after the communication resumption largely changed to the communication parameters stored immediately before the measurement, the results communication quality immediately after the communication resumption is sometimes remarkably deteriorated. これは、 this is,
通信パラメータの一要素である送信電力についてみた場合に特に大きな問題となる。 A particularly significant problem when tried with the transmission power which is one element of the communication parameters.

【0010】すなわち、移動局MSの送信電力は、通信中において刻々と変化する無線伝送路の状況に対応するために、基地局BSaから通知されるパワーコントロールビットに従い短い周期(例えば1秒間に800回)でこまめに制御されている。 [0010] That is, the transmission power of the mobile station MS, for responding to the situation in the radio transmission path to ever-changing during communication, 800 short period (e.g. one second in accordance with a power control bit sent from the base station BSa It is frequently controlled by times). しかし、この送信電力の制御は上記隣接基地局BSbの受信電界強度測定期間中には停止状態となる。 However, control of the transmission power is in a stopped state during reception field strength measuring period of the neighbor base station BSb. このため、測定開始直前に保存した古い送信電力値をそのまま使用して通信再開時の送信電力値を決定してしまうと、通信再開直後の送信電力値が実際の送信電力値に対しかけ離れた値となり、この結果種々の不具合を生じる。 Therefore, Continued use would determine the transmission power value at the time of communication restart, the value transmit power value immediately after the communication resumption is far to the actual transmission power value the old transmission power value stored in the measurement immediately before the start next, the resulting various problems.

【0011】例えば、通信再開直後の送信電力値が必要以上に大きいと、周囲の移動局の通信に干渉を与えてこれが通信品質を劣化させる原因になる。 [0011] For example, when the transmission power value immediately after the communication resumption is larger than necessary, it is it gives an interference to the communication of the surrounding mobile station becomes a cause of deteriorating the communication quality. 逆に、通信再開直後の送信電力値が極端に不足すると、通信相手の基地局に上りデータが届かず、通信断状態となって結果的に回線が切断される場合がある。 Conversely, when the transmission power value immediately after the communication resumption is an extreme shortage, not reach the uplink data to the base station of the communication partner, which may result in line by a communication disconnection state is disconnected.

【0012】この発明は上記事情に着目してなされたもので、その目的とするところは、隣接基地局の受信品質測定終了後に元の基地局との通信を再開する際に、常に最適な通信パラメータに従い通信を再開できるようにし、これにより干渉や回線切断の発生を防止して通信再開後の通信品質を良好に保持することが可能な移動通信端末装置を提供することにある。 [0012] The present invention has been made in view of the above circumstances, and has as its object, when resuming the communication with the original base station after completion of the reception quality measurements of neighboring base stations, always optimal communication parameters according to to resume communications, thereby to provide an interference or better mobile communication terminal device capable of holding the communication quality after the communication resumption and prevent the occurrence of line disconnection.

【0013】 [0013]

【課題を解決するための手段】上記目的を達成するためにこの発明に係わる移動通信端末装置は、無線エリア間の移動に伴い、通信中の第1の無線周波数を周辺無線エリアの第2の無線周波数に一時的に切り替えてその受信品質を測定したのち、元の第1の無線周波数に切り替えて通信を再開する処理を行う場合に、上記第1の無線周波数から第2の無線周波数への切替直前に、その通信パラメータを検出してこれを切替前情報として記憶するとともに、上記第2の無線周波数から第1の無線周波数への切替復帰直後に、その通信パラメータを検出してこれを切替後情報として記憶し、かつ通信パラメータ補正手段において、上記切替前情報と切替後情報とを比較し、 SUMMARY OF THE INVENTION The mobile communication terminal according to the present invention in order to achieve the above object device, according to the movement between the radio area, the first radio frequency in communication near wireless area second After measuring the reception quality temporarily switch to a radio frequency, in the case of performing the resume process the communication is switched to the first radio frequency source, from the first radio frequency to a second radio frequency to immediately before the switching, the switching stores this by detecting the communication parameters as the pre-switching information, immediately after switching the return to the first radio frequency from the second radio frequency, it detects the communication parameters stored as the post information, and the communication parameter correcting means, and comparing the pre-switching information and the switching information after,
その比較結果をもとに上記切替復帰後に再開する通信の通信パラメータを補正するようにしたものである。 The comparison result is obtained so as to correct the communication parameters resume communication after the switching back to the original.

【0014】具体的には、上記第1の検出手段において第1の無線周波数の切替直前の受信品質を検出してこれを切替前情報として記憶すると共に、第2の検出手段において第1の無線周波数の切替直後の受信品質を検出してこれを切替後情報として記憶し、かつ通信パラメータ補正手段により、第1の無線周波数の切替直前の受信品質と切替直後の受信品質とを比較して、その大小関係をもとに切替復帰後に再開する通信の送信電力を補正するように構成する。 [0014] More specifically, and stores this by detecting the reception quality immediately before the switching of the first radio frequency in the first detecting means as pre-switching information, the first radio in the second detection means It detects the reception quality immediately after switching of the frequency is stored as the post-switching information, and the communication parameter correcting means compares the reception quality immediately after the reception quality and switching immediately before the switching of the first radio frequency, the magnitude relation is configured to correct the transmission power of resuming communication after the original to the switching restoration.

【0015】さらに、上記送信電力の補正量を求める場合には、上記第1の検出手段において第1の無線周波数の切替直前の受信品質とその時刻を検出してこれを切替前情報として記憶すると共に、第2の検出手段において第1の無線周波数の切替直後の受信品質とその時刻を検出してこれを切替後情報として記憶し、かつ通信パラメータ補正手段により、上記切替直前の時刻と切替直後の時刻とから第2の無線周波数の受信品質の測定に要した処理時間を求めてこの処理時間中に欠落した送信電力制御の回数を予測し、この予測回数に応じて送信電力の最適補正量を求める。 Furthermore, when obtaining a correction amount of the transmission power, and stores the detected reception quality and its time immediately before the switching of the first radio frequency in the first detecting means as pre-switching information with, in the second detection means detects the reception quality and its time immediately after the switching of the first radio frequency is stored as the post-switching information, and the communication parameter correcting means, immediately after the time the switching of the switching immediately prior from the time and the seek processing time required for the measurement of the reception quality of the second radio frequency to predict the number of transmission power control missing during this processing time, the optimum correction amount of the transmission power according to the predicted number of times the seek.

【0016】従ってこの発明によれば、切替直前に記憶した通信パラメータと切替復帰直後に検出した通信パラメータとの比較結果をもとに、切替復帰後に再開する通信の通信パラメータが最適値に補正される。 [0016] Therefore, according to the present invention, based on the comparison result of the communication parameter detected immediately after the communication parameters and switching the return stored in immediately before the switching, the communication parameters of the resume communication after switching restoration is corrected to the optimum value that. このため、 For this reason,
隣接する無線エリアの受信品質測定期間中に通信パラメータが変化しても、常に最適な通信パラメータにより通信を再開することが可能となる。 Also the communication parameter in the reception quality measurement period of the adjacent radio area is changed, by always optimal communication parameters it is possible to resume communication.

【0017】例えば、切替直前に記憶した受信品質と切替復帰直後に記憶した受信品質との大小関係をもとに、 [0017] For example, on the basis of the size relationship between the reception quality stored immediately after the reception quality and switching return stored in the immediately before the switching,
通信再開時の送信電力を増加方向に補正するか、減少方向に補正するか、或いは補正無しとするかが判定される。 Or to correct the transmission power at the time of communication restart in an increasing direction, or to correct the decreasing direction, or whether the no correction is determined. さらに、切替直前の時刻と切替復帰直後の時刻との差から第2の無線エリアの受信品質測定時間が求められ、この測定時間中に欠落した送信電力制御の予測回数をもとに、送信電力の最適補正量が求められる。 Further, the reception quality measurement time difference from the second wireless areas between the time immediately after the switching immediately before the time and switching the return is determined, based on the predicted number of transmission power control missing during the measurement time, the transmission power the optimum amount of correction is required. このようにすることで、通信再開直後の送信電力を的確に補正することができる。 By doing so, it is possible to accurately correct the transmit power immediately after the communication resumption.

【0018】したがって、通信再開直後の送信電力値を常に実際の状況に対応した適切な値に設定することができ、この結果送信電力の上がり過ぎによる他の移動通信端末装置への干渉や、送信電力の下がり過ぎによる通信断を防止して、通信再開後においても安定で高品質の通信を維持することができる。 [0018] Thus, it is possible to set to an appropriate value corresponding to the always actual situation transmit power value immediately after the communication resumption, this by rising too far results transmit power interference and to other mobile communication terminal apparatus, transmission to prevent communication interruption due to fall too far power, also it can maintain communication stably high quality after the communication resumption.

【0019】 [0019]

【発明の実施の形態】以下、この発明に係わる移動通信端末装置の実施形態を説明する。 BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a mobile communication terminal according to the present invention. 図1は、この発明の一実施形態であるCDMA移動通信端末装置の構成を示す回路ブロック図である。 Figure 1 is a circuit block diagram showing a configuration of a CDMA mobile communication terminal apparatus according to an embodiment of the present invention.

【0020】同図において、図示しない基地局から送信された無線周波信号は、アンテナ1で受信されたのちアンテナ共用器2(DUP)を介して受信回路(RX)3 [0020] In the figure, a radio frequency signal transmitted from a base station (not shown), received via the antenna duplexer 2 (DUP) after being received by the antenna 1 circuit (RX) 3
に入力される。 It is input to. 受信回路3では、上記無線周波信号が周波数シンセサイザ(SYN)4から出力された受信局部発振信号とミキシングされて中間周波或いはベースバンドの受信信号に周波数変換される。 In the receiving circuit 3, is frequency-converted said radio frequency signal is received local oscillation signal and mixing output from a frequency synthesizer (SYN) 4 to the reception signal of intermediate frequency or baseband. なお、上記周波数シンセサイザ4から発生される受信局部発振信号の周波数は、制御部40から出力される制御信号SYCによって指示される。 The frequency of the reception local oscillation signal generated by the frequency synthesizer 4 is designated by a control signal SYC output from a control unit 40.

【0021】上記受信信号は、CDMA信号処理部6において、直交復調処理が施されたのち、受信チャネルに割り当てられた拡散符号(PN符号)により逆拡散処理が施されてデータレートに応じた所定のフォーマットの復調データに変換される。 [0021] The received signal is predetermined in the CDMA signal processing unit 6, after the quadrature demodulation processing has been performed, the inverse diffusion processing by the spreading code assigned to the receiving channel (PN code) corresponding to that the data rate applied It is converted format into demodulated data. そしてこの変換された復調データは音声符号処理部7に入力され、また上記受信データのうちデータレートを示すデータについては受信データレートとして制御部40に入力される。 And this converted demodulated data is input to the voice code processing unit 7, and for data indicating the data rate of the received data is input to the control unit 40 as reception data rate.

【0022】音声符号処理部7は、上記CDMA信号処理部6から出力された復調データに対し、制御部40から通知される受信データレートに応じた伸長処理を施したのち、ビタビ復号等を用いた復号処理と誤り訂正復号処理とを行って、受信ディジタルデータを再生する。 The voice code processing unit 7, to the demodulated data output from the CDMA signal processing unit 6, then subjected to decompression processing corresponding to the received data rate notified from the control unit 40, use a Viterbi decoding or the like go have decoding process and the error correction decoding process to reproduce the received digital data.

【0023】PCM符号処理部8は、制御部40から出力されたディジタル音声信号通信の種別(音声通信であるかデータ通信であるか)に応じて異なる信号処理を行なう。 The PCM code processing unit 8 performs different signal processing depending on the type of the digital audio signal communication that is output from the control unit 40 (or a data communication or a voice communication). すなわち、音声通信時には、音声符号処理部7から出力された受信ディジタルデータをPCM復号してアナログ受話信号を出力する。 That is, at the time of voice communication, and outputs an analog reception signal by PCM decoding received digital data output from the voice code processing unit 7. このアナログ受話信号は、 The incoming analog voice signal,
受話増幅器9にて増幅されたのちスピーカ10より拡声出力される。 Is loud output from the speaker 10 after being amplified by the receiving amplifier 9. これに対しデータ通信時には、音声符号処理部7から出力された受信ディジタルデータを制御部4 When the data communication contrast, the control unit 4 the received digital data output from the voice code processing unit 7
0へ出力する。 To output to 0. 制御部40は、上記受信ディジタルデータを図示しない外部インタフェースから例えば携帯情報端末(PDA:Personal Digital Assistance )やノート型パーソナル・コンピュータ等のパーソナル・コンピュータ(図示せず)へ出力する。 Control unit 40, the received digital data from the external interface such as a mobile information terminal (not shown): outputs (PDA Personal Digital Assistance) or such as a notebook personal computer to personal computer (not shown). なお、制御部40とパーソナル・コンピュータとの間のデータ転送にはモデム等を備えたパーソナル・コンピュータ用の通信インタフェースが用いられる。 The communication interface for personal computers with modems or the like is used for data transfer between the controller 40 and the personal computer.

【0024】一方、音声通信時における話者の入力音声は、マイクロホン11を通じてアナログ送話信号として入力され、送話増幅器12で適正信号レベルまで増幅されたのち、PCM符号処理部8にてPCM符号化処理が施され、送信データとして音声符号処理部7に供給される。 On the other hand, the input voice of the speaker at the time of voice communication is inputted as an analog transmission signal through the microphone 11, after being amplified to a proper signal level at a transmission amplifier 12, a PCM code by the PCM code processing unit 8 process is performed, it is supplied to the audio code processing section 7 as transmission data. また、パーソナル・コンピュータから出力されたデータは、外部インタフェースを介して制御部40に入力され、この制御部40からPCM符号処理部8を介して音声符号処理部7へ出力される。 The data outputted from the personal computer is input to the controller 40 via the external interface, is output to the voice code processing unit 7 through the PCM code processing unit 8 from the control unit 40.

【0025】音声符号処理部7は、音声通信時には、P [0025] The voice code processing unit 7, at the time of voice communication, P
CM符号処理部8から出力された送信音声データより入力音声のエネルギー量を検出し、この検出結果に基づいてデータレートを決定する。 Detecting the energy amount of the input speech from the transmission voice data outputted from the CM code processing unit 8, determines the data rate based on the detection result. そして、上記送信データを上記データレートに応じたフォーマットのバースト信号に圧縮し、さらに誤り訂正符号化処理を施したのちCD Then, the transmission data is compressed to a burst signal having a format corresponding to the data rate, then further subjected to error correction coding processing CD
MA信号処理部6へ出力する。 And outputs to the MA signal processing unit 6. また、データ通信時においては、PCM符号処理部8から出力された送信データを、予め設定されたデータレートに応じたフォーマットのバースト信号に圧縮し、さらに誤り訂正符号化処理を施してCDMA信号処理部6へ出力する。 The data at the time of communication, the transmission data output from the PCM code processing unit 8, and compressed into formats burst signal according to a preset data rate, further CDMA signal processing by performing error correction coding processing and outputs it to the part 6. なお、音声通信時およびデータ通信時、いずれのデータレートも、送信データレートとして制御部40に通知される。 Incidentally, during the time and data communications voice communications, one of the data rate is also notified to the control unit 40 as the transmission data rate.

【0026】CDMA信号処理部6は、上記音声符号処理部7にて圧縮されたバースト信号に対して、送信チャネルに割り当てられたPN符号を用いて拡散処理を施す。 The CDMA signal processing unit 6, to the burst signal compressed by the voice code processing unit 7, a diffusion process is performed using a PN code assigned to a transmission channel. そしてこの拡散符号化された送信信号に対して直交変調処理を施し、この直交変調信号を送信回路(TX) The quadrature modulation processing on the diffusion coded transmission signal, the transmission circuit the quadrature modulated signal (TX)
5へ出力する。 And outputs it to the 5.

【0027】送信回路5は、上記直交変調信号を周波数シンセサイザ4から発生される送信局部発振信号と合成して無線周波信号に変換する。 The transmitter circuit 5 is converted to a radio frequency signal by combining the transmission local oscillation signal generating the orthogonal modulation signal from the frequency synthesizer 4. そして、送信回路5は、 Then, the transmission circuit 5,
制御部40により通知される送信データレートに基づいて、上記無線周波信号の有効部分だけを高周波増幅し、 Based on the transmission data rate informed by the control unit 40, only the effective part of said radio frequency signal to the high frequency amplification,
送信無線周波信号として出力する。 And outputs it as a transmission radio frequency signal. この送信回路5から出力された送信無線周波信号は、アンテナ共用器2を介してアンテナ1に供給され、このアンテナ1から図示しない基地局へ向けてバースト送信される。 Transmission radio frequency signal outputted from the transmitting circuit 5 is supplied to the antenna 1 via the duplexer 2, it is a burst transmitted to a base station (not shown) from the antenna 1.

【0028】ところで、制御部40は例えばマイクロコンピュータを主制御部として有したもので、その制御機能としては、発着信に応じて図示しない基地局と通信リンクを開設して音声通信やデータ通信を行なうための通信制御機能や、通話相手の音声を記憶部41を用いて録音/再生する制御機能等の通常の制御機能に加え、本発明に係わる制御機能として異周波数間ハンドオーバ制御手段40aと、送信電力補正処理機能40bとを備えている。 By the way, the control unit 40 by way having for example a microcomputer as a main control unit, as its control functions, the voice communication and data communication by establishing a communication link with a base station (not shown) in response to the incoming and outgoing communication control function and for performing, in addition to voice of the other party to the normal control functions of the control function for recording / reproducing using the memory unit 41, and the inter-frequency handover control unit 40a as a control function according to the present invention, and a transmission power correction processing function 40b.

【0029】異周波数間ハンドオーバ制御手段40a [0029] The inter-frequency handover control means 40a
は、基地局から隣接基地局の受信品質測定指示が到来した場合に、通信中の基地局との通信を一時中断して、無線周波数を隣接基地局の無線周波数に切り替えその受信品質を測定する。 , When the reception quality measurement instruction of the neighbor base stations from the base station has arrived, and suspend communication with the base station in communication, measures the reception quality switching a radio frequency to a radio frequency of adjacent base stations . そして測定結果を基地局に通知したのち、元の無線周波数に切り替えて基地局との間の同期を再度確立したのち通信を再開する。 The measurement results After notification to the base station resumes communication After establishing synchronization again between the base station switches to the original radio frequency.

【0030】送信電力補正処理機能40bは、上記異周波数間ハンドオーバ制御の過程において、無線周波数を隣接基地局の周波数に切り替える直前と、測定終了後無線周波数を隣接基地局の周波数から元の無線周波数に切り替えた直後において、その時の基地局との間の通信パラメータを保存する。 The transmission power correction processing function 40b is the in the course of inter-frequency handover control, and immediately before switching the radio frequency to the frequency of the neighbor base stations, based on radio frequency from the frequency of the measurement after the end radio frequency neighbor base station immediately after switching on, and stores the communication parameters between the base station at that time. このとき保存する通信パラメータには、例えば図5に示すように、通信相手の基地局ID The communication parameters to be stored this time, for example, as shown in FIG. 5, the base station ID of the communication partner
やチャネル情報等のシステム構成情報(基本パラメータ)に加え、最終送信電力値と、受信電界強度と、切替直前の時刻(測定開始時刻)と、切替復帰直後における受信電界強度と、切替復帰時点の時刻(測定終了時刻) In addition to the system configuration information, such as and channel information (basic parameter), a final transmit power value, and received signal strength, and immediately before the switching time (measurement start time), the received signal strength immediately after switching restoration, switching restoration time time (end of measurement time)
とが含まれる。 Door are included. そして送信電力補正処理手段40bは、 The transmission power correction unit 40b is
切替復帰直後において、上記保存した通信パラメータを用いて通信再開時に設定すべき最適な送信電力値を算出する。 Immediately after switching restoration, it calculates the optimal transmission power value to be set when the communication resuming using the communication parameters described above saved.

【0031】なお、31は電源回路であり、バッテリ3 [0031] In addition, 31 is a power supply circuit, the battery 3
0の出力を基に所定の動作電源電圧Vccを生成して各回路部に供給する。 Based on the output of 0 generates a predetermined operation power supply voltage Vcc is supplied to each circuit unit. また42は入力部であり、これにはダイヤルキー、発信キー、電源キー、終了キー、音量調節キー及びモード指定キー等の各種キーが設けられている。 The 42 is the input unit, the dial keys to, call key, power key, end key, various keys such as volume control keys and the mode designation key is provided. さらに43はLCD等を用いた表示部であり、これらは通話相手端末の電話番号や装置の動作状態等が表示される。 Further 43 is a display unit using the LCD or the like, which are operation states of the telephone number or device of the other party terminal is displayed.

【0032】次に、以上のように構成されたCDMA移動通信端末装置の異周波数間ハンドオーバの動作を説明する。 [0032] Next, the operation of the inter-frequency handover configured CDMA mobile communication terminal device as described above. 図3はその制御手順及び制御内容を示すフローチャートである。 Figure 3 is a flowchart showing the control procedure and control contents.

【0033】なお、ここでも図6に示したように、移動局MSが通信中にセルA内の地点P1からセルA,Bの境界付近P2を通ってセルB内の地点P3に移動する場合を例にとって説明する。 It should be noted, again as shown in FIG. 6, when the mobile station MS moves cell cell A from the point P1 in A, a point P3 in the cell B through the boundary vicinity P2 of B during the communication It will be described as an example.

【0034】セルA内において移動局MSは、ステップ2aで基地局BSaとの通信制御を行いながら、ステップ2bで無線周波数の切替えが必要か否かを監視している。 The mobile station MS in the cell A, while communication control with the base station BSa in step 2a, the switching of the radio frequency is monitored whether it is necessary in step 2b. この状態で、基地局BSaから無線周波数の探索を指示する指示メッセージが到来すると、移動局MSはステップ2cで現在の通信に係わるシステム構成情報、つまり基本パラメータを保存すると共に、ステップ2dにてこの時点での最終送信電力値と、受信電界強度と、時刻(測定開始時刻T2)とを記憶部42内の保存テーブル(図5)に保存する。 In this state, when an instruction message for instructing the search for a radio frequency from a base station BSa arrives, the mobile station MS is system configuration information relating to the current communication in step 2c, i.e. saves the basic parameters, the step 2d a final transmit power value at the time, stores the received electric field intensity, the time storage table of (measurement start time T2) and the storage unit 42 (FIG. 5).

【0035】そして、この通信パラメータの保存が終了すると移動局MSは、ステップ2eで図4に示すように無線周波数を探索対象の隣接基地局BSbの無線周波数F2に切り替え、ステップ2fにおいてこの無線周波数F2を介して基地局BSbから到来するパイロット信号の受信電界強度を測定する。 [0035] Then, the mobile station MS and storage of the communication parameters is completed, the radio frequency as shown in FIG. 4 switch to radio frequency F2 of the search target neighbor base station BSb in step 2e, the radio frequency in step 2f the received electric field strength of the pilot signals arriving from the base station BSb via the F2 measured. そして、受信電界強度の測定が終了すると、その測定値を隣接基地局BSbに通知したのち、ステップ2gで図4に示すように元の無線周波数F1に切り替える。 When the measurement of the reception field intensity is finished, it switches its measurements After notifies the adjacent base station BSb, the original radio frequency F1 as shown in FIG. 4 in step 2g.

【0036】さて、そうして元の無線周波数F1に切り替え復帰すると移動局MSは、通信相手の基地局BSa [0036] Now, thus the mobile station MS to be switched back to the original radio frequency F1 is, of the communication partner base station BSa
との間の通信を再開するが、その際にステップ2hにおいて送信電力の補正処理を実行する。 Resume communication between performs the correction processing of the transmission power in step 2h at that time. 図3はその処理手順と処理内容を示すフローチャートである。 Figure 3 is a flow chart showing the processing contents and processing procedures.

【0037】すなわち、移動局MSは、先ずステップ3 [0037] That is, the mobile station MS, first Step 3
aで切替復帰直後に無線周波数F1を介して到来する無線信号の受信電界強度を検出し、この検出値を現在時刻(測定終了時刻T3)と共に保存テーブルに図5に示すように保存する。 Detects the reception field strength of a radio signal arriving via the radio frequency F1 immediately after switching returns with a, is stored in the storage table along with the detection value the current time (measurement end time T3), as shown in FIG. そして、ステップ3bで、保存テーブルに保存されている切替直前の受信電界強度と切替復帰直後の受信電界強度とを比較する。 Then, in step 3b, comparing the received field strength immediately before the switching stored in the storage table and the received field strength immediately after the switching restoration.

【0038】この比較の結果、 (切替直前の受信電界強度)<(切替復帰直後の受信電界強度) だった場合には、切替直前より送信電力を低下させる必要があると判断し、送信電力の補正量を求める。 The result of this comparison, if it was (received field intensity immediately before the switching) <(received field strength immediately after switching the return), it is determined that it is necessary to lower the transmission power from immediately before the switching, the transmission power obtaining a correction amount.

【0039】すなわち、先ずステップ3dにおいて保存テーブルに保存されている測定開始時刻T2と測定終了時刻T3とから、無線周波数F2の受信電界強度の測定に要した時間(T3−T2)を求める。 [0039] That is, first from the measurement start time T2 stored measurement end time T3 Metropolitan storage table in step 3d, determine the time required for measurement of the reception field intensity of the radio frequency F2 (T3-T2). この測定所要時間(T3−T2)は、無線周波数をF1からF2に切り替えるために必要な時間と、受信電界強度の測定所要時間と、無線周波数をF2からF1に切り替えるための必要な時間とから構成される。 The time required for measurement (T3-T2) from the time required to switch the radio frequency F2 from F1, and measuring the time required for the reception field strength, the time required to switch the radio frequency from F2 to F1 constructed. そして、ステップ3eにおいて上記測定所要時間(T3−T2)中に欠落した無線周波数F1に対する送信電力制御の回数を求める。 Then, a number of transmission power control for the radio frequency F1 which is missing in the measurement duration (T3-T2) in step 3e. この欠落した送信電力制御回数は、 (測定所要時間(T3−T2))/(送信電力制御周期) により算出される。 The missing transmission power control number is calculated by (measuring duration (T3-T2)) / (transmission power control period). なお、送信電力の制御周期は例えば1秒間に800回に設定されている。 The control cycle of the transmission power is set to 800 times for example per second.

【0040】次に移動局MSは、ステップ3fにおいて、上記算出した欠落した送信電力制御回数と、1回の電力制御量Sとをもとに (欠落した送信電力制御回数)×(1回の電力制御量S) なる演算を行って送信電力の補正量を求め、さらにこの補正量と保存テーブルに保存してある切替直前の最終送信電力値とから (切替直前の最終送信電力値)−(補正量) なる演算を行って、これにより再送信時に設定すべき送信電力値(送信電力1)を求める。 [0040] Then the mobile station MS at step 3f, the transmission power control number of missing calculated above, once (transmission power control number missing) on ​​the basis of the power control amount S × (1 time obtain a correction amount of the transmission power by performing power control amount S) becomes operational, further from the correction amount and the final transmit power value immediately before the switching that is stored in the storage table (the final transmit power value immediately before the switching) - ( performing correction amount) becomes operational, thereby the transmission power value should be set at the time of retransmission (transmission power 1) obtaining.

【0041】これに対し、上記ステップ3bにおける比較の結果、 (切替直前の受信電界強度)≧(切替復帰直後の受信電界強度) だった場合には、移動局MSは送信電力値を補正する必要がないと判断してステップ3cに移行する。 [0041] In contrast, the result of the comparison in step 3b, if it was (received field intensity immediately before the switching) ≧ (received field strength immediately after switching the return), the mobile station MS is necessary to correct the transmission power value the process proceeds to step 3c is determined that there is no. そして、 And,
ここで送信電力値を保存テーブルに保存されている切替直前の最終送信電力値に設定する。 Here set to the last transmit power value immediately before the switching stored the transmission power value in the storage table. つまり、 通信再開後の送信電力値(送信電力2)=(切替直前の最終送信電力値) とする。 That is, the transmission power value after the communication resumption (transmit power 2) = a (final transmit power value immediately before the switching).

【0042】そうして通信再開時の送信電力値が設定されると移動局MSは、この決定した送信電力値を送信回路5に設定し、基地局BSaとの間のフレーム同期が再度確立したのち基地局BSaとの間の通信を再開する。 [0042] Then the mobile station MS and the transmission power value at the time of communication restart is set, sets the transmission power value this decision to the transmitting circuit 5, the frame synchronization between the base station BSa is established again resume communication between the later base station BSa.
この再開した通信により、先の隣接基地局サーチによって得られた隣接基地局BSbの受信電界強度測定結果が基地局BSaに報告される(ステップ2i)。 The communication in this resume, the previous neighbor base station BSb obtained by the adjacent base station search received field strength measurement results are reported to the base station BSa (step 2i).

【0043】以上詳述したようにこの実施形態では、基地局BSaとの間の通信を中断して無線周波数を隣接基地局BSbの無線周波数F2に一時的に切り替えてその受信品質を測定し、測定終了後に元の無線周波数F1に切り替えて基地局BSaとの通信を再開する処理を行う際に、無線周波数F1からF2への切替直前の最終送信電力値、受信電界強度及び時刻を保存すると共に、無線周波数F2からF1に切り替えた直後の受信電界強度及び時刻を保存する。 [0043] In this embodiment, as described above, to measure the reception quality by switching temporarily radio frequency to interrupt the communication on the radio frequency F2 of the adjacent base station BSb between the base station BSa, when communicating to resume processing of the after measurement to the base station is switched to the original radio frequency F1 BSa, final transmit power value immediately before the switching from the radio frequency F1 to F2, saves the received field strength and time , stores the received field strength and time immediately after switching from the radio frequency F2 to F1. そして、切替直前の受信電界強度と切替復帰直後の受信電界強度とを比較してその大小関係を判定すると共に、切替直前の時刻と切替復帰直後の時刻から測定所要時間を求めて、この測定期間中に欠落した送信電力制御回数を求め、この欠落した送信電力制御回数をもとに送信電力の補正量を算出して、この補正量と上記大小関係の判定結果とに基づいて送信電力値を決定し通信を再開するようにしている。 Then, the determining the magnitude relation by comparing the received field strength immediately after reception field intensity and switching the return immediately before the switching, seeking time required for measurement from the time immediately after the time and switching the return immediately before the switching, the measurement period determined the transmission power control number of missing during, the missing transmission power control number to calculate the correction amount of the transmission power on the basis of the transmission power value based on the determination result of the correction amount and the magnitude relationship determined so that to resume the communication.

【0044】したがってこの実施形態であれば、隣接する無線エリアBの受信品質測定期間中に移動局MSが移動したり無線環境が変化したとしても、通信再開直後の送信電力値を常に実際の状況に対応した適切な値に設定することができ、この結果送信電力の上がり過ぎによる他の移動通信端末装置への干渉や、送信電力の下がり過ぎによる通信断を防止して、通信再開後においても安定で高品質の通信を維持することができる。 [0044] Therefore, if this embodiment, even neighboring wireless area wireless environment or the mobile station MS moves during reception quality measurement period for B is changed, always actual situation transmit power value immediately after the communication resumption can be set to an appropriate value corresponding to the interference and to the result transmission power other mobile communication terminal apparatus according rising too far, to prevent communication interruption due to fall too far transmission power, even after the communication resumption it is possible to maintain communication stably high quality.

【0045】なお、この発明は上記実施形態に限定されるものではない。 [0045] The present invention is not limited to the above embodiment. 例えば、前記実施形態では(切替直前の受信電界強度)<(切替復帰直後の受信電界強度)だった場合にのみ補正量を算出して送信電力値を補正するようにしたが、(切替直前の受信電界強度)>(切替復帰直後の受信電界強度)の場合にも、補正量を算出して送信電力値を補正するようにしてもよい。 For example, in the embodiment has been to correct the transmission power value to calculate a correction amount only if it was (received field intensity immediately before the switching) <(received field strength immediately after switching reset), (immediately before the switching of the If the received field strength)> (received field strength immediately after switching the return) may also be corrected transmission power value to calculate a correction amount.

【0046】また、切替直前の受信電界強度と切替復帰直後の受信電界強度との大小関係を判定するだけでなくその差を求め、この差が所定量を超えている場合にのみ送信電力値の補正を行うようにしてもよい。 [0046] Further, obtains the difference not only to determine the magnitude relationship between the reception field strength immediately after reception field intensity and switching the return immediately before the switching, only transmission power value when the difference exceeds a predetermined amount correction may be performed. このようにすると、受信電界強度の差が小さく実質的に補正が不要な場合には補正処理が省略され、これにより通信を再開するまでに要する時間を短縮することが可能となる。 In this way, correction processing is omitted if the reception electric field intensity difference is less substantial correction is not required, it is possible to shorten the time required until thereby resume communication.

【0047】さらに、前記実施形態では受信電界強度を検出してこれをそのまま受信品質とするようにしたが、 [0047] Furthermore, although in the above embodiment has been adapted to the as received quality this by detecting the reception field strength,
受信電界強度と共にデータ誤り率を検出してこれらをもとに受信品質を求めるようにしてもよい。 Reception field strength by detecting a data error rate with may be obtained reception quality on the basis of these.

【0048】その他、端末装置の種類や構成、送信電力補正処理の手順と内容等についても、この発明の要旨を逸脱しない範囲で種々変形して実施できる。 [0048] Other types and configurations of the terminal device, also such procedures and the content of the transmission power correction can be variously modified without departing from the scope of the invention.

【0049】 [0049]

【発明の効果】以上詳述したようにこの発明では、無線エリア間の移動に伴い、通信中の第1の無線周波数を周辺無線エリアの第2の無線周波数に一時的に切り替えてその受信品質を測定したのち、元の第1の無線周波数に切り替えて通信を再開する処理を行う場合に、上記第1 In this invention, as described above in detail, along with the movement between the radio areas, the reception quality by switching the first radio frequency in the communication to a second radio frequency near wireless area temporarily After measuring, the case of performing the resume process the communication is switched to the first radio frequency source, the first
の無線周波数から第2の無線周波数への切替直前に、その通信パラメータを検出してこれを切替前情報として記憶するとともに、上記第2の無線周波数から第1の無線周波数への切替復帰直後に、その通信パラメータを検出してこれを切替後情報として記憶し、かつ通信パラメータ補正手段において、上記切替前情報と切替後情報とを比較し、その比較結果をもとに上記切替復帰後に再開する通信の通信パラメータを補正するようにしている。 To immediately before the switching from the radio frequency to the second radio frequency, and stores this by detecting the communication parameters as the pre-switching information, immediately after switching the return to the first radio frequency from the second radio frequency , and stores it to detect the communication parameters as the post-switching information, and the communication parameter correcting means, and comparing the pre-switching information and the switching information after restarts the comparison result after the switching back to the original and corrects the communication parameters of the communication.

【0050】従ってこの発明によれば、隣接基地局の受信品質測定終了後に元の基地局との通信を再開する際に、常に最適な通信パラメータに従い通信を再開することができ、これにより干渉や回線切断の発生を防止して通信再開後の通信品質を良好に維持することが可能な移動通信端末装置を提供することができる。 [0050] Therefore, according to the present invention, when resuming the communication with the original base station after completion of the reception quality measurements of neighboring base stations, you can always resume communication in accordance optimum communication parameters, thereby interfering Ya it is possible to provide a mobile communication terminal device capable of maintaining good communication quality after to communication resumption prevent line disconnection.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】 この発明の一実施形態であるCDMA移動通信端末装置の構成を示す回路ブロック図。 Figure 1 is a circuit block diagram showing a configuration of a CDMA mobile communication terminal apparatus according to an embodiment of the present invention.

【図2】 図1に示した装置による異周波数間ハンドオーバの制御手順及び制御内容を示すフローチャート。 2 is a flowchart showing a control procedure and control contents of the inter-frequency handover by the apparatus shown in FIG.

【図3】 図2に示した制御中の送信電力補正処理の手順と内容を示すフローチャート。 3 is a flowchart showing the procedure and contents of the transmission power correction in the control shown in FIG.

【図4】 図1に示した装置による異周波数間ハンドオーバの動作を説明するための図。 4 is a diagram for explaining an operation of the inter-frequency handover by the apparatus shown in FIG.

【図5】 送信電力の補正のために保存テーブルに保存されるパラメータの一例を示す図。 Figure 5 is a view showing an example of parameters stored in the storage table to correct transmission power.

【図6】 移動局が無線周波数の異なるセル間を移動する場合の動作を説明するための図。 Diagram for explaining the operation when the 6 mobile station moves between different cells of a radio frequency.

【図7】 従来の異周波数間ハンドオーバの動作を説明するための図。 7 is a diagram for explaining an operation of the conventional inter-frequency handover.

【符号の説明】 DESCRIPTION OF SYMBOLS

A,B…セル BSa,BSb…基地局 MS…移動局 F1,F2…無線周波数 1…アンテナ 2…アンテナ共用器(DUP) 3…受信回路(RX) 4…周波数シンセサイザ 5…送信回路(TX) 6…CDMA信号処理部 7…音声符号処理部 8…PCM符号処理部 9…受話増幅器 10…スピーカ 11…マイクロホン 12…送話増幅器 20…外部インタフェース 30…バッテリ 31…電源回路 40…制御部 40a…異周波数間ハンドオーバ制御手段 40b…送信電力補正処理手段 41…記憶部 42…入力部 43…表示部 A, B ... cell BSa, BSb ... base station MS ... mobile station F1, F2 ... RF 1 ... antenna 2 ... antenna duplexer (DUP) 3 ... reception circuit (RX) 4 ... Frequency synthesizer 5 ... transmission circuit (TX) 6 ... CDMA signal processing unit 7 ... audio code processing unit 8 ... PCM code processing unit 9 ... reception amplifier 10 ... speaker 11 ... microphone 12 ... transmission amplifier 20 ... external interface 30 ... battery 31 ... power supply circuit 40 ... control part 40a ... inter-frequency handover control unit 40b ... transmission power correcting means 41 ... storage unit 42 ... input unit 43 ... display unit

Claims (3)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 第1の無線周波数が割り当てられた第1 1. A first of the first radio frequency is allocated
    の無線エリアから第2の無線周波数が割り当てられた第2の無線エリアに移動する際に、通信中の第1の無線周波数を第2の無線エリアの第2の無線周波数に一時的に切り替えてその受信品質を測定したのち、元の第1の無線周波数に切り替えて通信を再開する機能を備えた移動通信端末装置において、 前記第1の無線周波数から第2の無線周波数への切替直前に、この時の通信パラメータを検出してこれを切替前情報として記憶する第1の検出手段と、 前記第2の無線周波数から第1の無線周波数への切替復帰直後に、この時の通信パラメータを検出してこれを切替後情報として記憶する第2の検出手段と、 前記第1の検出手段により検出された切替前情報と前記第2の検出手段により検出された切替後情報とを比較し、その比較結果を When moving from the radio area to the second wireless area in which the second radio frequency is allocated, by switching the first radio frequency in communication with a second to temporarily radio frequency of the second wireless area After measuring the reception quality in the mobile communication terminal device having a function to resume communication is switched to the first radio frequency source, to immediately before the switching from the first radio frequency to a second radio frequency, first detection means for storing as the pre-switching information by detecting the communication parameters in this, immediately after switching the return from the second radio frequency to a first radio frequency, detecting the communication parameters when the and compares the second detection means for storing as the post-switching information, and said first detected after-switching information has been the pre-switching information detected by the detecting means by said second detection means, the the result of the comparison とに前記切替復帰後に再開する通信の通信パラメータを補正する通信パラメータ補正手段とを具備したことを特徴とする移動通信端末装置。 Mobile communication terminal apparatus characterized by comprising a communication parameter correcting means for correcting the communication parameters resume communication after the switching back to and.
  2. 【請求項2】 前記第1の検出手段は、第1の無線周波数の切替直前の受信品質を検出してこれを切替前情報として記憶し、 前記第2の検出手段は、第1の無線周波数の切替直後の受信品質を検出してこれを切替後情報として記憶し、 前記通信パラメータ補正手段は、第1の無線周波数の切替直前の受信品質と切替直後の受信品質とを比較し、その大小関係に基づいて切替復帰後に再開する通信の送信電力を補正することを特徴とする請求項1記載の移動通信端末装置。 Wherein said first detection means detects the reception quality immediately before the switching of the first radio frequency is stored as pre-switching information, the second detecting means, a first radio frequency detects the reception quality immediately after switching of storing it as the post-switching information, the communication parameter correction means compares the reception quality immediately after the reception quality and switching immediately before the switching of the first radio frequency, the magnitude mobile communication terminal apparatus according to claim 1, wherein the correcting the transmission power of the resumed communication after switching the return based on the relationship.
  3. 【請求項3】 前記第1の検出手段は、第1の無線周波数の切替直前の受信品質とその時刻を検出してこれを切替前情報として記憶し、 前記第2の検出手段は、第1の無線周波数の切替直後の受信品質とその時刻を検出してこれを切替後情報として記憶し、 前記通信パラメータ補正手段は、前記切替直前の時刻と切替直後の時刻とから第2の無線周波数の受信品質の測定に要した処理時間を求めてこの処理時間中に欠落した送信電力制御の回数を予測し、この予測回数に応じて送信電力の最適補正量を求めることを特徴とする請求項2 Wherein said first detection means detects the reception quality and its time immediately before the switching of the first radio frequency is stored as pre-switching information, the second detection means, first of detecting a reception quality and its time immediately after the switching of radio frequencies and stored as the post-switching information, the communication parameter correcting means, the second radio frequency from the time the switch immediately after the time of the switching immediately prior seeking the processing time required for measurement of the reception quality to predict the number of transmission power control missing during the processing time, according to claim 2, characterized in that determining the optimum correction amount of the transmission power according to the predicted number of times
    記載の移動通信端末装置。 Mobile communication terminal apparatus according.
JP27053699A 1999-09-24 1999-09-24 Mobile communication terminal Pending JP2001095031A (en)

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JP2007311851A (en) * 2006-05-16 2007-11-29 Sanyo Electric Co Ltd Mobile communication terminal, wireless station apparatus switching method, and wireless station apparatus switching program
JP2009505547A (en) * 2005-08-15 2009-02-05 ノキア コーポレイション Apparatus, method and computer program for including local area information in a broadcast message and preserving a black list of a radio access network
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US8971288B2 (en) 2006-03-22 2015-03-03 Lg Electronics Inc. Method of supporting handover in a wireless communication system
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US8032157B2 (en) 2005-08-15 2011-10-04 Nokia Corporation Apparatus, method and computer program product providing inclusion of local area information in broadcast messages and maintenance of radio access network black list
US8155652B2 (en) 2005-10-27 2012-04-10 Qualcomm Incorporated Tune-away and cross paging systems and methods
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US8457075B2 (en) 2005-10-27 2013-06-04 Qualcomm Incorporated Tune-away protocols for wireless systems
US8229433B2 (en) 2005-10-27 2012-07-24 Qualcomm Incorporated Inter-frequency handoff
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US8064405B2 (en) 2005-10-27 2011-11-22 Qualcomm Incorporated Tune-away protocols for wireless systems
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US8244269B2 (en) 2006-01-05 2012-08-14 Lg Electronics Inc. Allocating radio resources in mobile communications system
USRE43949E1 (en) 2006-01-05 2013-01-29 Lg Electronics Inc. Allocating radio resources in mobile communications system
US9456455B2 (en) 2006-01-05 2016-09-27 Lg Electronics Inc. Method of transmitting feedback information in a wireless communication system
US8867449B2 (en) 2006-01-05 2014-10-21 Lg Electronics Inc. Transmitting data in a mobile communication system
US9253801B2 (en) 2006-01-05 2016-02-02 Lg Electronics Inc. Maintaining communication between mobile terminal and network in mobile communication system
US9036596B2 (en) 2006-01-05 2015-05-19 Lg Electronics Inc. Transmitting data in a mobile communication system
US10045381B2 (en) 2006-02-07 2018-08-07 Lg Electronics Inc. Method for transmitting response information in mobile communications system
US9462576B2 (en) 2006-02-07 2016-10-04 Lg Electronics Inc. Method for transmitting response information in mobile communications system
US9706580B2 (en) 2006-02-07 2017-07-11 Lg Electronics Inc. Method for transmitting response information in mobile communications system
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US9220093B2 (en) 2006-06-21 2015-12-22 Lg Electronics Inc. Method of supporting data retransmission in a mobile communication system

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