WO2003085862A1 - Station de base et systeme de communications - Google Patents

Station de base et systeme de communications Download PDF

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Publication number
WO2003085862A1
WO2003085862A1 PCT/JP2002/003462 JP0203462W WO03085862A1 WO 2003085862 A1 WO2003085862 A1 WO 2003085862A1 JP 0203462 W JP0203462 W JP 0203462W WO 03085862 A1 WO03085862 A1 WO 03085862A1
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WO
WIPO (PCT)
Prior art keywords
modulation
value
base station
mobile station
sir
Prior art date
Application number
PCT/JP2002/003462
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English (en)
Japanese (ja)
Inventor
Jinsong Duan
Original Assignee
Mitsubishi Denki Kabushiki Kaisha
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Denki Kabushiki Kaisha filed Critical Mitsubishi Denki Kabushiki Kaisha
Priority to PCT/JP2002/003462 priority Critical patent/WO2003085862A1/fr
Publication of WO2003085862A1 publication Critical patent/WO2003085862A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
    • H04W52/267—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the information rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo

Definitions

  • the present invention relates to a base station and a communication system that control a modulation and coding scheme and transmission power according to a measured quality value of a communication channel.
  • An adaptive modulation and coding scheme is used in a cellular mobile communication system, especially in a high-speed downstream bucket communication system (HSDPA: High SpeedDowlnlinkPacktEtAccess).
  • the adaptive modulation and coding scheme is a scheme in which a base station feedbacks the reception quality of a mobile station, and the base station adaptively switches the modulation scheme and coding rate based on the reception quality of the mobile station.
  • the mobile station When the mobile station receives the spread modulation signal transmitted from the base station, it measures the block error rate B LER of the spread modulation signal.
  • the mobile station determines a desired modulation and coding scheme MCS level with reference to a preset MCS (Modulation and Coding Scheme) list, and checks the level of the modulation and coding scheme MCS.
  • the information is transmitted to the base station as one feedback information.
  • the base station determines the modulation and coding scheme MCS to be used based on the feedback information.
  • the base station performs modulation and coding in accordance with the modulation and coding scheme MCS, and transmits a spread modulated signal to the mobile station with a default fixed transmission power.
  • an appropriate modulation and coding scheme MCS can be determined according to the block error rate BLER. Since the spread-spectrum modulated signal is transmitted to the mobile station with the default fixed transmission power, there has been a problem that the transmission power cannot be reduced.
  • the present invention has been made to solve the above problems, and has as its object to provide a base station and a communication system capable of reducing transmission power without lowering the maximum transmission rate. And Disclosure of the invention
  • a base station calculates a difference value between a quality measurement value received by a reception unit and a minimum necessary quality value in a modulation and coding method selected by a method selection unit, and calculates a difference value based on the difference value.
  • the transmission power of the spread modulation signal to be transmitted to the mobile station is controlled.
  • the transmission power can be reduced without lowering the maximum transmission speed.
  • a base station selects a modulation and coding scheme having the highest quality value among modulation and coding schemes satisfying a quality measurement value received by a receiving means.
  • a base station is configured to select a modulation and coding scheme with reference to a table indicating a correspondence between various modulation and coding schemes and quality values.
  • the base station calculates the transmission power offset from the difference value, subtracts the transmission power offset from the default fixed transmission power, and uses the subtraction result as the transmission power of the spread modulation signal. Things.
  • the base station according to the present invention has an effect of minimizing the transmission power.
  • the transmission power of the spread modulation signal is determined from the transmission power offset.
  • a modulation coding method is selected in consideration of the measured value.
  • the modulation means is selected by using the various types of quality measurement values.
  • the base station when the receiving means receives the SIR value and the block error rate as quality measurement values from the mobile station, selects a modulation and coding scheme according to the SIR value at the time of initial transmission or discontinuous transmission, During continuous transmission, the modulation and coding method is selected according to the block error rate.
  • the base station when the receiving means receives the number of multi-codes from the mobile station, the base station selects the modulation and coding method in consideration of the number of multi-codes.
  • the communication system upon receiving a quality measurement value from a mobile station, selects a modulation and coding scheme according to the quality measurement value, and selects the quality measurement value and the minimum necessary quality in the modulation and coding scheme.
  • a base station is provided which calculates a difference value with respect to the value and controls the transmission power of the spread modulation signal to be transmitted to the mobile station based on the difference value.
  • FIG. 1 is a configuration diagram showing a base station according to Embodiment 1 of the present invention.
  • FIG. 2 is a configuration diagram showing a mobile station according to Embodiment 1 of the present invention.
  • FIG. 3 is a flowchart showing transmission power control in the base station.
  • FIG. 4 is a flowchart showing quality measurement processing in the mobile station.
  • FIG. 5 is a graph showing BLER / SIR characteristics in each modulation and coding scheme MCS.
  • FIG. 6 is a conceptual diagram illustrating transmission power control.
  • FIG. 7 is an explanatory diagram showing a SIR table.
  • FIG. 8 is a conceptual diagram showing the relationship between the default fixed transmission power per bit and the transmission power offset.
  • FIG. 9 is a configuration diagram showing a base station according to Embodiment 3 of the present invention.
  • FIG. 10 is a block diagram showing a mobile station according to Embodiment 3 of the present invention.
  • FIG. 11 is a graph showing BLER / SIR characteristics for each moving speed.
  • FIG. 12 is an explanation showing an SIR table.
  • FIG. 13 is a configuration diagram showing the internal configuration of the measurement value receiving unit.
  • FIG. 14 is an explanatory diagram showing main channels in HSDPA.
  • FIG. 15 is a graph showing BLER / SIR characteristics for each number of multicodes. BEST MODE FOR CARRYING OUT THE INVENTION
  • FIG. 1 is a configuration diagram showing a base station according to Embodiment 1 of the present invention
  • 1 is a variable rate coding unit for inputting transmission information divided into a transport block, performing error correction on the transport block, and changing the coding rate of the transport block
  • 2 An interleaver that performs interleave processing on the transport park encoded by the variable-rate encoder 1, and 3 converts bit data that is output data of the interleaver 2 into symbol data.
  • the variable modulator 3 converts bit data into symbol data in accordance with a modulation and coding scheme (MCS) specified by the HSDPA transmission power controller 5. .
  • MCS modulation and coding scheme
  • An HSDPA transmission power control unit 6 to be controlled is an RF unit that converts a spread modulation signal output from the HSDPA transmission power control unit 5 into a radio frequency and outputs the converted signal to an antenna.
  • Reference numeral 11 denotes a measurement value reception unit (reception means) that receives an SIR value (referred to as I0r / Ioc value in 3GPP terminology) as a communication channel quality measurement value from the mobile station.
  • an SIR value referred to as I0r / Ioc value in 3GPP terminology
  • the present invention is not limited to this.
  • a C / I value or an SNR value may be received.
  • 1 2 is a required SIR value calculator for calculating a required SIR value of each modulation and coding scheme MCS when there are a plurality of selectable modulation and coding schemes MCS, 13 is received by the measurement value receiving section 11 SI IU direct and required SIR value calculator 1 JP02 / 03462
  • the MCS determining unit that selects the optimal modulation and coding system MCS by referring to the required SIR value of each modulation and coding system MCS calculated by 2 and 14 is the modulation selected by the MCS determining unit 13
  • An AMCS scheduler that, upon receiving the coding scheme MCS, finally determines the modulation coding scheme MCS in consideration of the packet communication requests of all mobile stations and the resource status of the base station.
  • the required SIR value calculation unit 12, the MCS determination unit 13 and the AMCS scheduler 14 constitute a method selection unit.
  • SIR offset calculator 15 estimates the minimum required quality value SIR min in the modulation and coding scheme MCS finally determined by the AMC scheduler 14 and compares the SIR value received by the measurement value reception unit 11 with the SII value.
  • Minimum required quality value SIR offset calculator that calculates the difference from SIR min (hereinafter referred to as SIR offset), and 16 is the SIR offset calculated by SIR offset calculator 15
  • the transmission power control unit calculates the transmission power offset, subtracts the transmission power offset from the default fixed transmission output, and uses the result of the subtraction as the transmission power of the spread modulation signal. It should be noted that the SIR offset calculation section 15 and the transmission power control section 16 constitute a power control means.
  • FIG. 2 is a configuration diagram showing a mobile station according to Embodiment 1 of the present invention.
  • reference numeral 21 denotes a despreading device for despreading a spread modulation signal with a code number and a code number included in downlink signaling.
  • a demodulation unit 22 for converting the symbol data output from the despreading unit 21 into a bit data, and 23 a bit data output from the demodulation unit 22.
  • a din evening reaver that performs a din evening reeve process for the evening, and a variable rate 24 that decodes a transport protocol that is bit data output from the din evening 23 It is a decoding unit.
  • 25 is a CPICH receiving unit that receives the common pilot channel CPICH
  • 26 is a common pilot channel received by the CPICH receiving unit 25
  • SIR value measurement unit that calculates the SIR value of the channel destined for itself by referring to the information on the CPI CH and the dedicated data channel power allocation and spreading factor addressed to itself.27 is the SIR calculated by the SIR value measurement unit 26. This is a feedback transmission unit that transmits the value to the base station.
  • FIG. 3 is a flowchart showing transmission power control in the base station
  • FIG. 4 is a flowchart showing quality measurement processing in the mobile station. Next, the operation will be described.
  • the modulation and coding scheme MCS with a high modulation index and coding rate has a high transmission rate, but requires a higher SIR value.
  • FIG. 5 is a graph showing BLE RZS IR characteristics in each modulation and coding scheme MCS.
  • BLER th is a threshold of a block error rate indicating a predetermined communication quality
  • a to F are thresholds of BLER. This is the required SIR value of the modulation coding scheme MCS (1) to (6) that satisfies th .
  • variable rate coding unit 1 When the transmission information divided into the transport blocks is input, the variable rate coding unit 1 performs error correction on the transport block and changes the coding rate of the transport block.
  • the coding rate of the transport block is given from the AMS scheduler 14.
  • the in-band reaver 2 Upon receiving the encoded transport block from the variable rate encoding unit 1, the in-band reaver 2 performs the in-loop processing on the transport block.
  • the in-night and leave processing is performed for each channel, but the in-and-out leave processing is performed, for example, when there is a memory having a row and an X-column configuration, data write processing to the memory is performed. While reading is performed in the column direction, data reading processing is performed in the row direction. By performing the overnight reeve processing, it is possible to mitigate the long-term continuation of the level decrease caused by Doppler peculiar to mobile communication.
  • variable modulator 3 converts the bit data that is the output data of the interleaver 2 into the symbol data. That is, the variable modulator 3 converts the bit data into symbol data according to the modulation and coding scheme MCS indicated by the AMS scheduler 14. Examples of the modulation scheme defined in the modulation and coding scheme MCS include QPSK, 16QAM, and 64QAM.
  • the spreading modulator 4 Upon receiving the symbol data from the variable modulator 3, the spreading modulator 4 spread-modulates the symbol data with the channelization code number and the number of codes given from the AMS scheduler 14. For example, if the number of codes is 5, spread modulation of symbol data is performed using five channelization codes.
  • the HSDPA transmission power control unit 5 When the HSDPA transmission power control unit 5 receives a spread modulation signal from the spread modulation unit 4 in order to reduce the transmission power without reducing the maximum transmission rate, the HSDPA transmission power control unit 5 appropriately adjusts the transmission power of the spread modulation signal. Control.
  • the measurement value reception unit 11 of the HSDPA transmission power control unit 5 receives the SIR value (step ST1). The process of measuring the SIR value at the mobile station will be described later.
  • FIG. 7 is an explanatory diagram showing an SIR table for storing a required SIR value, which is a calculation result of the required SIR value calculation unit 12.
  • the MCS determining section 13 refers to the SIR table in FIG. 7 and selects one of the modulation and coding schemes that can satisfy the required SIR value. The one with the largest SIR value is selected (step ST2).
  • the MCS levels are arranged in ascending order of information rate. The higher the MCS level, the higher the information rate and the higher the required SIR value.
  • the AMCS scheduler 14 Upon receiving the modulation and coding scheme MCS selected by the MCS deciding unit 13, the AMCS scheduler 14 takes into account the packet communication requests of all mobile stations and the resource status of the base station, and modulates the coding scheme. Finalize MCS.
  • the AMCS scheduler 14 outputs the coding rate defined in the modulation coding scheme MCS to the variable rate coding section 1, outputs the modulation scheme to the variable modulation section 3, and sets the channelization code number.
  • ⁇ Output the number of codes to spreading modulator 4.
  • the SIR offset calculator 15 estimates the minimum required quality value SIR min in the modulation and coding scheme MCS (see FIG. 6). ). For example, the minimum required quality value SIR min is calculated by multiplying the required S value of the modulation and coding scheme MCS by a predetermined coefficient.
  • the SIR value received by the measurement value The difference from the quality value SIR min is calculated as an SIR offset (step ST3).
  • the SIR offset may be calculated in consideration of a predetermined SIR margin.
  • SIR offset ⁇ h SIR value-SIR min -SIR margin
  • the transmission power controller 16 calculates the SIR offset by the SIR offset calculator 15. Since it is proportional, for example, as shown below, the transmission power offset is calculated from the SIR offset (step ST4).
  • the transmission power offset is subtracted from the default fixed transmission power, and the subtraction result is determined as the transmission power of the spread modulation signal (step ST5).
  • Transmission power Default fixed transmission power ⁇ Transmission power offset
  • FIG. 8 is a conceptual diagram showing the relationship between default fixed transmission power and transmission power offset per bit. '
  • the RF section 6 converts the spread modulation signal to a radio frequency and outputs it to the antenna, thereby converting the spread modulation signal. Send to mobile station.
  • the spread modulation signal is applied to despreading section 21 after radio frequency conversion is performed.
  • the despreading unit 21 despreads the spread modulation signal with the code number and the code number included in the downlink signaling, and outputs a symbol data.
  • the demodulation unit 22 Upon receiving the symbol data from the despreading unit 21, the demodulation unit 22 receives it in advance.
  • the received modulation and coding scheme MCS converts the symbol data into bit data.
  • the deinterleaver 23 Upon receiving the bit data from the demodulation unit 22, the deinterleaver 23 performs an interleave process on the bit data.
  • Din Yu The Din Yi Reeve processing of Lever 23 is the reverse processing of the InterLino's 2 In Yi Reeve processing.
  • variable rate decoding unit 24 Upon receiving the transport block, which is bit data, from the digital receiver 23, the variable rate decoding unit 24 decodes the transport block.
  • the CP I CH receiving section 25 receives the common pilot channel CP I CH (step ST 11).
  • the SIR value measuring unit 26 refers to the common pilot channel CP ICH and the dedicated data of the individual data channel power allocation and spreading factor addressed to itself. To calculate the SIR value of the channel addressed to itself (step ST12) o
  • the feedback transmission unit 27 transmits the SIR value to the base station (step ST13).
  • the HSDPA transmission power control unit 5 when the HSDPA transmission power control unit 5 receives the SIR value, it selects the modulation and coding scheme MCS according to the SIR value, and selects the SIR value.
  • SIR offset which is the difference value between the required minimum quality value SIR min and the modulation and coding scheme MCS, is calculated, and based on the SIR offset, the spread modulation signal output from the spread modulator 4 is calculated. Since the transmission power is controlled, the transmission power can be reduced without lowering the maximum transmission speed.
  • the mobile station calculates the SIR value and transmits it to the base station has been described.
  • the mobile station holds the SIR table as shown in FIG.
  • the modulation and coding scheme MCS may be selected, and the selection information of the modulation and coding scheme MCS may be transmitted to the base station.
  • the measured value receiving section 11 of the base station receives the selection information of the modulation and coding scheme MCS instead of the SIR value from the mobile station. Select an encoding method. This has the effect of reducing the processing load on the base station. Further, the mobile station may calculate the SIR offset in the same manner as the SIR offset calculation unit 15 of the base station, and transmit the SIR offset to the base station.
  • measured value receiving section 11 of the base station receives the SIR offset and outputs the SIR offset to transmission power control section 16. This has an effect that the SIR offset calculator 15 of the base station can be omitted.
  • FIG. 9 is a block diagram showing a base station according to Embodiment 3 of the present invention.
  • the same reference numerals as in FIG. 1 denote the same or corresponding parts, and a description thereof will be omitted.
  • 3 1 is a measurement value receiving unit (reception means) that receives the SIR value from the mobile station and also receives the moving speed or Doppler frequency of the mobile station.
  • 3 2 is when there are multiple selectable modulation and coding schemes MCS.
  • the required SIR value of each modulation and coding scheme The required SIR value calculation unit that calculates the SIR value and the moving speed or the Doppler frequency received by the measurement value reception unit 31 and each modulation and coding scheme calculated by the required SIR value calculation unit 32
  • An MCS determination unit that selects the optimal modulation and coding scheme MCS by referring to the required SIR value of the MCS.
  • the required SIR value calculation unit 32 and the MCS determination unit 33 constitute a method selection means.
  • SIR min in the MCS is estimated, and the SIR value received by the measurement value receiving unit 3 1 and the minimum required quality value
  • SIR offset calculator power control means
  • FIG. 10 is a block diagram showing a mobile station according to Embodiment 3 of the present invention.
  • the same reference numerals as in FIG. 2 denote the same or corresponding parts, and a description thereof will be omitted.
  • 4 1 is a mobile measuring unit for measuring the moving speed or Doppler frequency of the mobile station
  • 4 2 is the SIR value calculated by the SIR value measuring unit 26 and the moving speed or Doppler frequency measured by the mobile measuring unit 41 Is transmitted to the base station.
  • the mobile station mobile measurement unit 41 selects the modulation and coding scheme MCS without considering changes in the mobile station's mobile speed and Doppler frequency. Measures the speed or Doppler frequency, and the feedback transmitter 42 of the mobile station compares the SIR value calculated by the SIR value measuring section 26 with the moving speed or Doppler frequency measured by the mobile measuring section 41 to the base station. , The base station may select the modulation and coding scheme in consideration of the moving speed of the mobile station or the Doppler frequency.
  • the required SIR value calculation unit 32 of the base station changes the BLER / SIR characteristic in the modulation and coding scheme MCS when the moving speed of the mobile station and the frequency of the docker are different (see FIG. 11).
  • the modulation and coding schemes MCS (1) to Calculate the required SIR value of (6).
  • FIG. 12 is an explanatory diagram showing an SIR table for storing a required SIR value calculated by the required SIR value calculation unit 32.
  • the MCS determination unit 33 refers to the SIR table in Fig. 12 and modulates the signal to satisfy the SIR value. Search for at least one coding method MCS, and select the modulation coding method MCS with the highest quality value from among them.
  • the modulation coding method MCS (4) having the highest quality value is selected from the modulation coding methods MCS (1), (2), (3), and (4).
  • the SIR offset calculator 34 estimates the minimum necessary quality value SIR min in the modulation and coding scheme MCS.
  • the modulation and coding scheme MCS (4) the modulation and coding scheme MCS (4)
  • the required minimum quality value SIR min is calculated by multiplying the required SIR value of D2 by a predetermined coefficient.
  • the modulation and coding scheme MCS is selected in consideration of the measured value. Therefore, even when the mobile station is moving, it is possible to select an appropriate modulation and coding scheme MCS and perform transmission power control, and as a result, it is possible to increase the communication capacity. Play.
  • the MCS determination unit 33 based on the SIR value
  • the base station receives a bit error rate BLER instead of an SIR value as a communication channel quality measurement value, for example, if a BLER table equivalent to the SIR table is prepared, modulation from the bit error rate BLER will be performed. Coding method MCS can be selected.
  • the bit error rate BLER has an advantage that it is not necessary to prepare a BLER table for each moving speed because the moving speed of the mobile station and the Fading environment element have been considered.
  • the modulation and coding scheme MCS may be selected based on the bit error rate BLER.
  • the measured value receiving section 11 of the base station receives the SIR value and the bit error rate BLER from the mobile station, and uses the SIR value or the bit error rate BLER as necessary. To select the modulation and coding scheme MCS.
  • the measurement value receiving section 11 incorporates a transmission status determination section 51 and a switching section 52 as shown in FIG. 13, and the transmission status determination section 51 initializes the transmission status at the base station. Judge whether it is during transmission, discontinuous transmission, or continuous transmission.
  • the switching unit 52 outputs the SIR value received from the mobile station to the MCS determination unit 13 and the like, and the Selects modulation and coding scheme MCS based on SIR value, and controls transmission power.
  • the transmission status determination unit 51 determines that continuous transmission is being performed, the bit error rate BLER received from the mobile station is output to the MCS determination unit 13 and the like, and the bit error rate is output. Selects modulation coding scheme MCS based on BL ER and controls transmission power.
  • the SIR measuring section 26 of the mobile station measures the bit rate B BLE in addition to measuring the SIR value. That is, the common pilot channel CPI CH, the associated HS-SC CH channel (a channel for notifying the mobile station of information such as the MCS level in advance), or the HS-DSCH channel to the mobile station itself (individual packet data addressed to the mobile station).
  • the feedback transmitter 27 measures the bit error rate BLER of the overnight channel) and sends the SIR value and bit error rate BLER to the base station.
  • FIG. 14 is an explanatory diagram showing main channels in HSDPA. According to the fourth embodiment, there is an effect that communication can be continued even if the transmission status changes.
  • Embodiment 5
  • Embodiments 1 to 4 although not particularly mentioned, if the number of multicodes is different, as shown in FIG. 15, the BLER / SIR characteristic in the modulation and coding scheme MCS changes.
  • the mobile station when the mobile station transmits the SIR value, a desired number of multi-codes is transmitted to the base station from the viewpoint of reducing intra-cell interference.
  • the MCS determination unit 13 When the measured value receiving unit 11 receives the SIR value and the desired number of multicodes from the mobile station, the MCS determination unit 13 considers the desired number of multicodes and modulates the modulation code from the SIR value. Select MCS. The required S I IU direct calculation unit 12 generates an S I R table for each multicode number in advance.
  • the base station transmits with the desired number of multi-codes of the mobile station, thereby achieving an effect of reducing intra-cell interference.
  • the base station feeds back the reception quality of the mobile station, and the base station performs the feedback based on the reception quality of the mobile station. It is suitable for adopting a method of adaptively switching the modulation method and the coding rate based on this.

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  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

Selon l'invention, dès réception d'une valeur SIR, une section de commande de puissance d'émission HSDPA (5) choisit un système de codage de modulation MCS en fonction de ladite valeur SIR et calcule un décalage SIR, soit la différence entre ladite valeur SIR et une valeur qualité requise minimale SIRmin dans ledit système de codage de modulation MCS, puis commande la puissance d'émission d'un signal de modulation d'étalement produit par une section de modulation d'étalement (4) en fonction de ladite valeur SIR. La puissance d'émission peut être réduite sans abaisser le débit d'émission maximal.
PCT/JP2002/003462 2002-04-05 2002-04-05 Station de base et systeme de communications WO2003085862A1 (fr)

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Publication number Priority date Publication date Assignee Title
WO2005096522A1 (fr) * 2004-03-30 2005-10-13 Matsushita Electric Industrial Co., Ltd. Dispositif de station de base, dispositif de station mobile et procede de programmation de voies de transmission
WO2005096523A1 (fr) * 2004-03-30 2005-10-13 Matsushita Electric Industrial Co., Ltd. Dispositif de station de base, dispositif de station mobile et procede d'attribution de voie de transmission de donnees

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JP2002101043A (ja) * 2000-06-26 2002-04-05 Matsushita Electric Ind Co Ltd 基地局装置、通信端末装置及び通信方法

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JPH04255119A (ja) * 1991-02-07 1992-09-10 Fujitsu Ltd 移動体通信端末
JPH0983600A (ja) * 1995-09-14 1997-03-28 Kokusai Electric Co Ltd 多値適応変調無線装置
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005096522A1 (fr) * 2004-03-30 2005-10-13 Matsushita Electric Industrial Co., Ltd. Dispositif de station de base, dispositif de station mobile et procede de programmation de voies de transmission
WO2005096523A1 (fr) * 2004-03-30 2005-10-13 Matsushita Electric Industrial Co., Ltd. Dispositif de station de base, dispositif de station mobile et procede d'attribution de voie de transmission de donnees
JPWO2005096523A1 (ja) * 2004-03-30 2008-02-21 松下電器産業株式会社 基地局装置、移動局装置およびデータチャネルの割当方法
JP4555285B2 (ja) * 2004-03-30 2010-09-29 パナソニック株式会社 基地局装置、移動局装置およびデータチャネルの割当方法

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