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WO2006016563A1 - Appareil de station de base et procédé de communication - Google Patents

Appareil de station de base et procédé de communication Download PDF

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Publication number
WO2006016563A1
WO2006016563A1 PCT/JP2005/014536 JP2005014536W WO2006016563A1 WO 2006016563 A1 WO2006016563 A1 WO 2006016563A1 JP 2005014536 W JP2005014536 W JP 2005014536W WO 2006016563 A1 WO2006016563 A1 WO 2006016563A1
Authority
WO
WIPO (PCT)
Prior art keywords
radio parameter
signal
received signal
base station
station apparatus
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.)
Ceased
Application number
PCT/JP2005/014536
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English (en)
Japanese (ja)
Inventor
Masayuki Hoshino
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of WO2006016563A1 publication Critical patent/WO2006016563A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0491—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more sectors, i.e. sector diversity

Definitions

  • the present invention relates to a base station apparatus and a communication method, and more particularly to a base station apparatus and a communication method that are useful when performing link stabilization (adaptive modulation) in a common packet channel.
  • Non-Patent Document 1 Conventionally, as a published paper on this type of base station apparatus, there has been known one related to the development of a space-time packet scheduler (throughput improvement effect by beam forming) (for example, see Non-Patent Document 1).
  • Non-Patent Document 1 assumes a configuration including an adaptive array antenna in a transmission system using link adaptation (adaptive modulation) on a downlink common channel.
  • the sector is divided into four beams using an adaptive array antenna, and the pilot signals specific to each beam are spread differently from each other. Transmit using a code.
  • each terminal device A, B, C, D, E, F, G, and H estimates the available downlink transmission rate based on the reception quality of each pilot signal, and Direct to device 60.
  • the base station apparatus 60 uses the transmission rates indicated by the terminal apparatuses A, B, C, D, E, F, G, and H to determine the allocated beam and the allocated terminal by the scheduler, and Directive transmission using adaptive array antennas is performed toward the terminal equipment.
  • Non-Patent Document 1 Published Paper; 2003 IEICE Communication Society B— 5-4, Sep. 2003
  • the base station device 60 needs to allocate the limited total transmission power to the pilot signals for each beam. Therefore, the pilot signal transmission power per beam must be reduced accordingly.
  • the terminal devices A, B, C, D, E, F, G, and H used in such a base station device 60 demodulate all pilot signals transmitted from the base station device 60. Therefore, demodulation processing increases as the number of beams increases.
  • An object of the present invention is to provide a base station apparatus and a communication method capable of realizing optimal signal transmission according to the propagation status of each terminal apparatus in a sector without increasing the number of beams in the sector. It is to be.
  • the base station apparatus of the present invention includes a plurality of receiving means for receiving a signal transmitted from a terminal apparatus with both omnidirectionality and individual directivity, and a first received signal received with the omnidirectionality. Synthesized by the omnidirectional synthesis means, the individual directional synthesis means for synthesizing the second received signal received with the individual directivity, the omnidirectional synthesis means and the individual directivity synthesis means.
  • Despreading means for despreading each received signal
  • received signal comparing means for comparing the first received signal and the second received signal that have been despread
  • Wireless parameter information reference means for extracting wireless parameter information from one received signal
  • wireless parameter correction means for adjusting the output of the wireless parameter information reference means on the basis of the difference of the comparison result in the received signal comparison means
  • User allocating means for allocating transmission resources to a user having the best radio parameter after correction by the radio parameter correcting means, and transmitting means for directionally transmitting a signal to the user allocated by the user allocating means.
  • the structure to comprise is taken.
  • the terminal device can reflect only the reception quality of the common pilot signal, and the effect obtained by the individual directivity in the base station device can be reflected in the radio parameter setting. It is possible to realize optimal signal transmission according to the user's propagation situation.
  • FIG. 1 is a schematic diagram showing a beam in a conventional base station apparatus.
  • FIG. 2 is a block diagram showing a configuration of a base station apparatus according to an embodiment of the present invention.
  • FIG. 3 is a block diagram showing a configuration of a terminal apparatus used in the base station apparatus according to one embodiment of the present invention.
  • FIG. 4 is a schematic diagram showing a processing flow between a base station apparatus and a terminal apparatus according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram showing a beam in a base station apparatus according to an embodiment of the present invention.
  • FIG. 6 is a diagram showing a reference table when radio parameters are set in the base station apparatus according to one embodiment of the present invention.
  • FIG. 2 is a block diagram showing the configuration of the base station apparatus according to one embodiment of the present invention.
  • base station apparatus 100 includes antennas 101 and 102, reception RF sections 103 and 104, omnidirectional combining sections 105 and 106, and individual directivity combining sections 107, 118, despreading sections 108 and 109, received signal demodulating section 110, received signal comparing section 111, radio parameter information referring section 112, radio parameter correction reference indicating section 113, radio parameter correcting section 114 A user allocation unit 115, a transmission signal generation unit 116, a modulation / coding unit 117, and transmission RF units 119 and 120.
  • each of the antennas 101 and 102 receives a signal transmitted from the terminal device 200 and transmits a signal toward the terminal device 200.
  • Reception RF sections 103 and 104 perform band limitation and amplification on reception signals captured by antennas 101 and 102, respectively.
  • the omnidirectional synthesis units 105 and 106 and the individual directivity synthesis unit 107 are received RF units 103 and 10.
  • Received signal demodulation section 110 performs demodulation processing on the received signal despread by despreading section 108.
  • Received signal comparing section 111 is synthesized by omnidirectional synthesis section 105 and despread by despreading section 108, and is synthesized by individual directivity synthesis section 107 and despread by despreading section 109.
  • the SNR with the received signal is compared with the delay spread, and the original value and the difference between the two are output to the radio parameter correction reference instructing unit 113 and the radio parameter correcting unit 114.
  • Radio parameter information reference section 112 extracts radio parameter information from the received signal demodulated by received signal demodulation section 110 and outputs the radio parameter information to radio parameter correction section 114.
  • Radio parameter correction reference instructing section 113 determines that "perform radio parameter correction” if the SNR or delay spread differential power input from received signal comparison section 111 exceeds a predetermined threshold. The parameter correction unit 114 is instructed. If the difference exceeds the threshold value, the wireless parameter correction unit 114 is instructed to “do not perform wireless parameter correction”.
  • Radio parameter correction unit 114 outputs radio parameter information reference unit 112 when radio parameter correction reference instruction unit 113 issues an instruction to “perform radio parameter correction”.
  • the radio parameter is corrected using the difference in SNR or delay spread output from the received signal comparator 111.
  • FIG. 6 is a diagram showing a reference table when radio parameters are set in the base station apparatus.
  • the radio parameter correction unit 114 can reduce the radio parameter information when the delay spread can be reduced to a ratio equal to or smaller than a predetermined value and is shorter than a predetermined value. It may be possible to implement control for assigning a modulation multi-level number higher than the radio parameter output from the reference unit 112.
  • User allocating section 115 allocates a transmission resource to a user whose radio parameter corrected by radio parameter correcting section 114 is the best.
  • Transmission signal generating section 116 generates a transmission signal to be transmitted to the user assigned by user assigning section 115.
  • the modulation / coding unit 117 modulates and encodes the transmission signal generated by the transmission signal generation unit 116 using the corrected radio parameter calculated by the radio parameter correction unit 114.
  • the individual directivity synthesis unit 118 synthesizes the signals modulated and encoded by the modulation / coding unit 117 so as to have individual directivities for the users assigned by the user assignment unit 115.
  • the transmission RF units 119 and 120 perform band limitation and amplification on the transmission signal synthesized by the individual directivity synthesis unit 118, and the antennas 101 and 101 are directed toward the terminal device 200 of the user to which the transmission signal is assigned. Send in 102.
  • received signals are synthesized by omnidirectional synthesis sections 105 and 106 and individual directivity synthesis section 107, and the result is compared by received signal comparison section 111.
  • the wireless parameter correction unit 114 calculates a correction value for the comparison result power, and the result is transferred to the user allocation unit 115 together with the wireless parameter information output from the wireless parameter information reference unit 112. Determine the assigned user.
  • the transmission signal of the allocated user is modulated and encoded using the corrected radio parameter, and is output to the transmission RF sections 119 and 120.
  • the transmission RF sections 119 and 120 perform upconversion or the like. After performing predetermined processing, this transmission signal is transmitted from each of the antennas 101 and 102.
  • FIG. 3 is a block diagram showing a configuration of a terminal apparatus used in the base station apparatus according to the present embodiment.
  • the terminal device 200 includes an antenna 201, a reception RF unit 202, a reception signal demodulation unit 203, a control information reference unit 204, a reference signal observation unit 205, a radio parameter generation unit 206, a transmission RF unit 207, a communication
  • a channel decoding unit 208 is provided.
  • antenna 201 receives a signal sent to base station apparatus 100 and transmits a signal to base station apparatus 100.
  • Reception RF section 202 performs band limitation and amplification on the received signal captured by antenna 201.
  • Received signal demodulation section 203 refers to control information such as radio parameters notified separately by control information reference section 204, and performs despreading and demodulation on the received signal sent from received RF section 202. Apply processing.
  • Reference signal observation section 205 observes the propagation state of the reference signal among the signals demodulated by reception signal demodulation section 203, and instructs observation result to radio parameter generation section 206.
  • Radio parameter generation section 206 generates radio parameters such as a modulation scheme and a code rate based on the reception quality of the common pilot channel transmitted to the entire sector.
  • Transmission RF section 207 performs band limitation and amplification on the transmission signal given from radio parameter generation section 206, and transmits this transmission signal to base station apparatus 100 through antenna 201.
  • Communication channel decoding unit 208 performs predetermined processing such as turbo decoding on the communication channel signal among the signals demodulated by reception signal demodulation unit 203.
  • received signal demodulation section 203 performs despreading and demodulation processing with reference to control information such as radio parameters notified separately.
  • the reference signal is used for observation of the propagation status by the reference signal observation unit 205, and the result Is transmitted to the antenna 201 after instructing the wireless parameter generation unit 206 to perform predetermined processing in the transmission RF unit 207.
  • communication channel signals are subjected to predetermined processing such as turbo decoding in the communication channel decoding unit 208, and then decoding is completed.
  • FIG. 4 is a schematic diagram showing a processing flow between the base station apparatus and the terminal apparatus according to the present embodiment.
  • terminal device 200 shown in FIG. 3 is shown as terminal devices A, B, C,... Located in the sector of base station device 100.
  • base station apparatus 100 transmits a common pilot signal to the entire sector as shown in FIG. 5 (step ST301).
  • FIG. 5 is a schematic diagram showing beams in the radio communication system according to the present embodiment.
  • Terminal devices A, B, C, ... of many users generate radio parameters such as modulation scheme and coding rate based on the reception quality of the common pilot channel transmitted to the entire sector (step ST302). ), And notifies (reports) the generated radio parameter to base station apparatus 100 (step ST303).
  • the base station apparatus 100 receives the radio parameter information notified from each terminal apparatus A, B, C, ..., each user individually, based on the adaptive algorithm, arrival direction estimation result, etc. Reception is performed with both the generated directivity and non-directivity, and the reception results of both are compared (step ST304).
  • base station apparatus 100 adjusts the radio parameter reported for the corresponding user power using a difference such as desired signal power and delay spread in the reception result. Specifically, for example, if the desired signal power due to individual directivity is improved by 5 dB due to omnidirectionality as in terminal device A shown in FIG. 6, the radio parameters reported from this terminal device A are The radio parameter shifted so as to realize the transmission rate is set higher by a predetermined value.
  • the base station apparatus 100 determines allotted users after completing the radio parameter notification and the above adjustment (radio parameter correction) for all reported users! ST305).
  • base station apparatus 100 transmits transmission data (common packet channel) to the allocated users. Are encoded and modulated in accordance with the radio parameters determined in the above procedure, and transmitted as a transmission signal together with a control signal used for notification of user assignment and radio parameter correction values (step ST306).
  • the terminal device A detects a transmission signal from the base station device 100 as a signal addressed to itself, the terminal device A assumes a radio parameter considering the correction value in the radio parameter reported to the base station device 100.
  • the received signal is demodulated and decoded.
  • terminal device A replies (reports the demodulation result) to base station device 100 as an ACKZNACK signal as to whether or not the packet has been extracted as a result of demodulating the received signal (step ST307).
  • the terminal device 200 can reflect only the reception quality of the common pilot signal, and can reflect the effect obtained by the individual directivity in the base station device 100 in the setting of the radio parameter. Optimal signal transmission along the line can be realized.
  • the desired signal power is used as a reference when calculating the difference between individual directivity and omni directivity, the signal power obtained by performing individual directivity transmission to the corresponding user is improved. A good amount can be estimated and optimal radio parameters can be determined. In this case, as a result, effective signal transmission and interference with adjacent cells can be reduced.
  • the individual directivity is formed as shown in terminal B in FIG. This will allow all users in the sector to benefit from beam transmission.
  • the present invention can realize optimal signal transmission according to the propagation status of each user, it is used for a base station apparatus that performs link adaptation (adaptive modulation) in a common packet channel. Is preferred.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)

Abstract

Appareil de station de base capable de fournir des transmissions de signaux optimales en conformité avec les statuts de propagation des appareils terminaux dans un secteur sans augmenter le nombre de faisceaux dans ledit secteur. Dans cet appareil de station de base (100), une pièce de transfert des informations des paramètres transmises sans fil (112) extrait les informations des paramètres transmises sans fil à partir d’un signal reçu démodulé par une pièce de démodulation du signal reçu (110). Une pièce de correction des paramètres transmis sans fil (114) utilise lors d’une correction des paramètres transmis sans fil la différence de l’étalement des retards ou RSB, émise par une pièce de comparaison du signal reçu (111), pour corriger les paramètres transmis sans fil en fonction des informations de paramètres transmis sans fil émis par la pièce de transfert des informations de paramètres transmis sans fil (112). Une pièce d’affectation utilisateur (115) affecte une ressource de transmission à un utilisateur ayant le meilleur paramètre transmis sans fil de ceux corrigés par la pièce de correction des paramètres transmis sans fil (114).
PCT/JP2005/014536 2004-08-11 2005-08-08 Appareil de station de base et procédé de communication Ceased WO2006016563A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004234822A JP2006054674A (ja) 2004-08-11 2004-08-11 基地局装置及び通信方法
JP2004-234822 2004-08-11

Publications (1)

Publication Number Publication Date
WO2006016563A1 true WO2006016563A1 (fr) 2006-02-16

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WO (1) WO2006016563A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016121252A1 (fr) * 2015-01-29 2016-08-04 ソニー株式会社 Dispositif et procédé

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001268633A (ja) * 2000-03-23 2001-09-28 Nippon Telegr & Teleph Corp <Ntt> 無線通信システム・無線基地局・移動局
JP2002076985A (ja) * 2000-08-25 2002-03-15 Matsushita Electric Ind Co Ltd 基地局装置、通信端末装置及び通信方法
JP2002232350A (ja) * 2000-12-01 2002-08-16 Hitachi Ltd 無線通信方法及びビーム方向可変型アンテナを用いた無線通信システム
JP2003318861A (ja) * 2002-04-24 2003-11-07 Nec Corp 移動通信システム、移動局、基地局及びそれらに用いる通信路品質推定方法
JP2004165834A (ja) * 2002-11-11 2004-06-10 Matsushita Electric Ind Co Ltd 基地局装置及び通信端末装置
JP2004232260A (ja) * 2003-01-29 2004-08-19 Milcon:Kk 排水性街渠の構造

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001268633A (ja) * 2000-03-23 2001-09-28 Nippon Telegr & Teleph Corp <Ntt> 無線通信システム・無線基地局・移動局
JP2002076985A (ja) * 2000-08-25 2002-03-15 Matsushita Electric Ind Co Ltd 基地局装置、通信端末装置及び通信方法
JP2002232350A (ja) * 2000-12-01 2002-08-16 Hitachi Ltd 無線通信方法及びビーム方向可変型アンテナを用いた無線通信システム
JP2003318861A (ja) * 2002-04-24 2003-11-07 Nec Corp 移動通信システム、移動局、基地局及びそれらに用いる通信路品質推定方法
JP2004165834A (ja) * 2002-11-11 2004-06-10 Matsushita Electric Ind Co Ltd 基地局装置及び通信端末装置
JP2004232260A (ja) * 2003-01-29 2004-08-19 Milcon:Kk 排水性街渠の構造

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