WO2010137644A1 - 無線通信装置およびデータ受信方法 - Google Patents
無線通信装置およびデータ受信方法 Download PDFInfo
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- WO2010137644A1 WO2010137644A1 PCT/JP2010/058987 JP2010058987W WO2010137644A1 WO 2010137644 A1 WO2010137644 A1 WO 2010137644A1 JP 2010058987 W JP2010058987 W JP 2010058987W WO 2010137644 A1 WO2010137644 A1 WO 2010137644A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/04—Error control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0064—Concatenated codes
- H04L1/0066—Parallel concatenated codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
- H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
- H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
- H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
- H04L69/324—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the data link layer [OSI layer 2], e.g. HDLC
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03159—Arrangements for removing intersymbol interference operating in the frequency domain
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
- H04W80/02—Data link layer protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
Definitions
- the present invention is based on the priority claim of Japanese Patent Application: Japanese Patent Application No. 2009-128036 (filed on May 27, 2009), the entire description of which is incorporated herein by reference. Shall.
- the present invention relates to a radio communication apparatus and a data reception method, and more particularly, to a radio communication apparatus and a data reception using a MAC (Medium Access Control) protocol and an RLC (Radio Link Control) protocol defined by 3GPP (3rd Generation Partnership Project). Regarding the method.
- MAC Medium Access Control
- RLC Radio Link Control
- Non-Patent Document 1 and Non-Patent Document 2 specify the specifications of the RLC protocol and the MAC protocol.
- a data processing unit called PDU Protocol Data Unit
- RLC layer PDUs are called RLC PDUs
- MAC layer PDUs are called MAC PDUs.
- the RLC PDU includes an RLC data PDU storing data and an RLC control PDU used for control.
- Patent Document 1 describes a data unit and a CRC (Cyclic Redundancy Code) check related to the data unit from the MAC layer to the RLC layer in an HSDPA (High Speed Downlink Packet Access) receiver device having a retransmission function in the MAC layer.
- a data processing method of a receiver apparatus in a wireless communication system is disclosed, which comprises a step of discarding the data unit when no error handling method is provided.
- FIG. 3 shows a configuration example of the RLC and MAC transmission processing unit of the transmission side apparatus.
- FIG. 4 shows a configuration example of the RLC and MAC reception processing unit of the receiving side apparatus.
- the MAC PDU creation unit 202 adds a MAC subheader corresponding to the RLC data PDU, adjusts the length by padding, and creates a MAC PDU.
- FIG. 5 is an example of a MAC PDU created by the MAC PDU creation unit 202.
- three RLC SDUs 1 to 3 are combined and an RLC header is added to make an RLC data PDU, and padding is added after the RLC data PDU.
- a MAC subheader 1 corresponding to RLC data PDU (MAC SDU) and a MAC subheader 2 corresponding to padding are added to form a MAC PDU.
- CRC is added to the MAC PDU as an error detection code by the CRC adding unit 203 in FIG. 3, encoded by a turbo code or the like by the encoding unit 204, and modulated by the modulation unit 205, thereby transmitting signals. Is generated.
- the receiving-side apparatus in FIG. 4 When such a signal is received by the receiving-side apparatus in FIG. 4, it is first demodulated by the demodulator X101 and then decoded by the decoder X102, and then the CRC judgment unit X110 performs a CRC check on the MAC PDU. Is called. If there is no error detection result in the CRC check result, the decoded MAC PDU is input to the MAC PDU analyzer X103.
- the MAC PDU analysis unit X103 decomposes the multiplex and passes the RLC data PDU to the RLC PDU buffer management unit X105.
- the RLC PDU buffer management unit X105 stores the RLC data PDU in a free area of the RLC SDU buffer X106. Further, the MAC PDU analysis unit X103 notifies the RLC creation command unit X108 of the RLC header of the RLC data PDU.
- the RLC creation command unit X108 analyzes the RLC header and gives information for creating an RLC SDU from the RLC PDU to the RLC SDU buffer management unit X105.
- the RLC PDU buffer management unit X105 delivers the RLC data PDU necessary for constructing the RLC SDU to the RLC SDU creation unit X109.
- the RLC SDU creation unit X109 combines the RLC data PDU and reconstructs the RLC SDU.
- the MAC PDU receiver side performs a CRC check on the MAC PDU, confirms that there are no errors in the check result, and then inputs the MAC PDU to the MAC PDU analyzer X103 to create an RLC SDU. It has a configuration.
- the CRC check can be started and the calculation can be completed after the entire MAC PDU has been decoded. For this reason, a buffer for storing the decoded MAC PDU is required until the CRC check result is calculated, and there is a problem that a buffer memory corresponding to the MAC PDU length is required in the CRC determination unit X110.
- the present invention has been made in view of the circumstances described above, and the object of the present invention is to eliminate the need for a buffer corresponding to the MAC PDU length for error detection processing represented by CRC, and to the buffer.
- An object of the present invention is to provide a configuration and method capable of eliminating processing delays associated with data input / output.
- the RLC data PDU which is the data processing unit of the RLC layer, is analyzed and buffered in the Radio Link Control layer (RLC layer), and the RLC layer refers to the result of error detection processing of the MAC PDU in the MAC layer.
- RLC SDU RLC Service Data Unit
- the RLC data PDU which is the data processing unit of the RLC layer, is analyzed and buffered, and the result of the MAC PDU error detection processing in the MAC layer is displayed in the RLC layer.
- a data receiving method including a step of creating an RLC Service Data Unit (RLC SDU) using an RLC data PDU without error is provided.
- the buffer for the MAC PDU length for error detection processing as well as the data in and out of the buffer become unnecessary.
- the reason is that the RLC data PDU included in the MAC PDU is analyzed and buffered without waiting for the completion of the CRC inspection, and the RLC SDU is created using the buffered RLC data PDU. There is.
- the radio communication apparatus has a circuit configuration for outputting a MAC PDU to the MAC PDU analysis unit 103a in the RLC layer when the received signal is demodulated and decoded.
- the MAC PDU analysis unit 103a extracts the RLC data PDU from the MAC PDU and stores it in the RLC PDU buffer X106 via the RLC PDU buffer management unit X105.
- the RLC SDU creation command unit 108a also in the RLC layer commands the creation of the RLC SDU using the stored RLC data PDU or the discarding of the RLC data PDU according to the CRC check result.
- the decoding unit 102a may perform a CRC check, or may be configured to include a processing unit that performs a CRC check separately.
- the buffer that holds the MAC PDU and the data in / out of the buffer become unnecessary.
- FIG. 2 is a block diagram showing the configuration of the data reception system of the wireless communication apparatus according to the first embodiment of the present invention.
- the demodulation unit 101, the decoding unit 102, the MAC PDU analysis unit 103, the RLC header storage unit 104, the RLC PDU buffer management unit 105, the RLC PDU buffer 106, and the CRC result extraction unit 107 A configuration including an RLC SDU creation command unit 108 and an RLC SDU creation unit 109 is shown. Each of these operates as follows.
- the demodulator 101 is a circuit that performs propagation path estimation and demodulates the received signal using the propagation path estimation result.
- the decoding unit 102 is a circuit that performs error correction using a demodulation result, outputs a MAC PDU, and then calculates a MAC PDU CRC check result.
- the MAC PDU analysis unit 103 is a circuit that analyzes a MAC subheader included in the MAC PDU and decomposes the MAC PDU into a MAC control element, an RLC data PDU, or an RLC control PDU. Further, the MAC PDU analysis unit 103 extracts the RLC header from the RLC data PDU and outputs it to the RLC header storage unit 104.
- the RLC header storage unit 104 is a buffer for storing the RLC header in the RLC data PDU.
- the RLC PDU buffer management unit 105 is a circuit that manages the RLC PDU buffer 106.
- the RLC PDU buffer management unit 105 stores the storage location of each RLC data PDU in the RLC PDU buffer 106.
- the RLC PDU buffer 106 is a buffer for storing RLC data PDUs.
- the CRC result extraction unit 107 is a circuit that detects the CRC check result of the MAC PDU calculated by the decoding unit 102 and embeds it in the RLC header stored in the RLC header storage unit 104.
- the RLC SDU creation command unit 108 is a circuit that creates RLC data PDU information necessary for creating the RLC SDU or RLC data PDU information to be discarded, and notifies the RLC PDU buffer management unit 105 of the information.
- the RLC SDU creation unit 109 is a circuit that constructs (creates) an RLC SDU by combining RLC data PDUs input from the RLC PDU buffer management unit 105.
- the transmission signal transmitted from the mobile terminal (mobile station) is input to the demodulation unit 101.
- Demodulation section 101 performs propagation path estimation using the reference signal of the received signal, performs a propagation path estimation result on the frequency axis, and calculates the weight of the frequency equalizer from this result. Frequency equalization is performed by multiplying the received signal by this weight. Further, the demodulation unit 101 calculates an LLR (Log Likelihood Ratio) from the signal in the frequency direction, and sends the LLR (Log Likelihood Ratio) to the decoding unit 102.
- LLR Log Likelihood Ratio
- the decoding unit 102 performs turbo decoding based on the LLR, decodes the MAC PDU, and outputs the decoded MAC PDU to the MAC PDU analysis unit 103. Also, the decoding unit 102 calculates a CRC check result of the MAC PDU. The CRC inspection result is held so that it can be referred to from the CRC result extraction unit 107.
- the MAC PDU analysis unit 103 starts analyzing the MAC subheader as soon as the MAC PDU is input, that is, before the CRC inspection result of the MAC PDU is calculated.
- the number of MAC subheaders in the MAC PDU (the number of MAC SDUs) or the MAC PDU length
- the number of received MAC subheaders exceeds the upper limit value of the MAC subheader in the MAC PDU analysis unit 103
- the MAC PDU length (size) exceeds the upper limit value
- the MAC PDU can be discarded and the subsequent processing can be stopped.
- the MAC PDU length can also be obtained by the sum of L fields in the MAC subheader (see Non-Patent Document 2; indicates the length of the corresponding MAC SDU).
- the MAC PDU analysis unit 103 extracts the RLC data PDU from the received MAC PDU, and the RLC PDU buffer management unit 105 Send to. Further, the MAC PDU analysis unit 103 extracts the RLC header from the RLC data PDU, sends it to the RLC header storage unit 104, and holds it until the CRC inspection result of the MAC PDU is calculated.
- the RLC PDU buffer management unit 105 stores the RLC data PDU input from the MAC PDU analysis unit 103 in a free area in the RLC PDU buffer 106. For all the RLC data PDUs included in one MAC PDU, the MAC PDU analysis unit 103 and the RLC PDU buffer management unit 105 repeat the above-described processing.
- the CRC result extraction unit 107 refers to the CRC check result of the MAC PDU by the decoding unit 102 and notifies the RLC SDU creation command unit 108 of the storage location information and length of the RLC header and RLC data PDU.
- the notification is performed by embedding (writing) 1-bit information indicating whether or not an error has been detected in the CRC check result in the RLC header.
- 1-bit information indicating whether or not an error has been detected in the CRC check result in the RLC header.
- the RLC SDU creation command unit 108 creates information for constructing the RLC SDU from the RLC data PDU using the RLC header stored in the RLC header storage unit 104, and the RLC PDU buffer. Notify the management unit 105. In this notification, as information for constructing the RLC SDU, the storage location information in the RLC PDU buffer 106 of the RLC PDU to be used, the information on how many bytes from what byte of the RLC PDU are used (the offset in the RLC PDU, RLC SDU use length).
- the RLC PDU buffer management unit 105 extracts the RLC SDU from the RLC SDU buffer 106 based on the above information and sends it to the RLC SDU creation unit 109.
- the RLC SDU creation unit 109 combines the extracted RLC SDUs to construct an RLC SDU.
- the RLC SDU creation command unit 108 when it is no longer necessary to store the RLC PDU in the RLC PDU buffer 106 because the RLC PDU is used for RLC SDU construction, the RLC PDU buffer management unit 105 stores this RLC PDU.
- An instruction to be deleted from the buffer 106 is output. This command includes the storage location information in the buffer of the RLC PDU to be deleted.
- the RLC SDU creation command unit 108 outputs to the RLC PDU buffer management unit 105 an instruction to delete the RLC data PDU including the RLC header in which bit 1 is embedded from the RLC PDU buffer 106. To do.
- This command includes the storage location information in the buffer of the RLC PDU to be deleted.
- the MAC PDU analysis process is suspended until it is understood that no error is detected in the MAC PDU CRC check result.
- the analysis of the MAC PDU is completed before the CRC inspection result of the MAC PDU is known, it is possible to shorten the processing in the RLC layer.
- the CRC check result of the MAC PDU is embedded in the RLC header, and the CRC result extraction unit 107 located in the RLC layer refers to the CRC error detected by the RLC SDU creation command unit 108 located in the RLC layer.
- the RLC data PDU corresponding to the MAC PDU is deleted from the RLC PDU buffer 106. For this reason, after the RLC SDU is constructed, the deletion management of the RLC PDU buffer 106 can be centrally managed only by the RLC layer together with the deletion of the RLC data PDU that is no longer necessary in the RLC PDU buffer 106.
- the sum of the input MAC PDU size or the value of the L field in the MAC PDU subheader has a predetermined upper limit value.
- the present invention is not limited to the above-described embodiments, and further modifications, substitutions, and adjustments may be made without departing from the basic technical idea of the present invention. Can be added.
- the CRC inspection result is embedded in the RLC header, it is also possible to embed the CRC inspection result in a header installed after the RLC header.
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Abstract
Description
本発明は、日本国特許出願:特願2009-128036号(2009年 5月27日出願)の優先権主張に基づくものであり、同出願の全記載内容は引用をもって本書に組み込み記載されているものとする。
本発明は、無線通信装置およびデータ受信方法に関し、特に、3GPP(3rd Generation Partnership Project)にて規定されたMAC(Medium Access Control)プロトコルおよびRLC(Radio Link Control)プロトコルを用いる無線通信装置およびデータ受信方法に関する。
上記RLCおよびMACプロトコルを用いた無線通信装置(移動局)と、基地局の動作について説明する。図3は、送信側装置のRLCおよびMAC送信処理部の構成例を示している。図4は受信側装置のRLCおよびMAC受信処理部の構成例を示している。
続いて、本発明の第1の実施形態について図面を参照して詳細に説明する。図2は、本発明の第1の実施形態に係る無線通信装置のデータ受信系の構成を表したブロック図である。
本発明の全開示(請求の範囲を含む)の枠内において、さらにその基本的技術思想に基づいて、実施形態ないし実施例の変更・調整が可能である。また、本発明の請求の範囲の枠内において種々の開示要素の多様な組み合わせないし選択が可能である。すなわち、本発明は、請求の範囲を含む全開示、技術的思想にしたがって当業者であればなし得るであろう各種変形、修正を含むことは勿論である。
102、102a 復号部
103、103a MAC PDU解析部
104 RLCヘッダ格納部
105 RLC PDUバッファ管理部
106 RLC PDUバッファ
107 CRC結果抽出部
108、108a RLC SDU作成命令部
109 RLC SDU作成部
201 RLC SDUバッファ
202 MAC PDU作成部
203 CRC付加部
204 符号化部
205 変調部
Claims (8)
- Medium Access Controlレイヤ(MACレイヤ)における、MACレイヤのデータ処理単位(PDU)に付された誤り検出符号を用いた誤り検出処理の完了を待たずに、Radio Link Controlレイヤ(RLCレイヤ)にて、RLCレイヤのデータ処理単位であるRLC data PDUを解析してバッファしておき、
RLCレイヤで、前記MACレイヤにおけるMAC PDUの誤り検出処理の結果を参照して、誤りのなかったRLC data PDUを用いて、RLC Service Data Unit(RLC SDU)を作成すること、
を特徴とする無線通信装置。 - 復調された受信信号を復号して得られたMAC PDUを、MAC PDU解析部に出力してから、Cyclic Redundancy Check検査結果(CRC検査結果)を算出する復号部と、
前記入力されたMAC PDUからRLC data PDUを抽出して解析するMAC PDU解析部と、
前記復号部にて算出されたCRC検査結果に基づいて、RLC data PDUからRLC SDUの作成またはRLC data PDUの廃棄を実行するRLC SDU作成命令部と、を備える請求項1の無線通信装置。 - さらに、
前記MAC PDU解析部によって、RLC data PDUから抽出されたRLCヘッダを格納するRLCヘッダ格納部と、
前記復号部にて算出されたCRC検査結果を参照して、前記RLCヘッダ格納部に格納されたRLCヘッダに、CRC検査結果を書き込むCRC結果抽出部と、を備え、
前記RLC SDU作成命令部は、前記RLCヘッダを参照して、CRC検査結果が正常であったか否かを判断する請求項2の無線通信装置。 - 前記MAC PDU解析部は、入力されたMAC PDUのサブヘッダ数が所定の上限値を超えた場合、当該MAC PDUを廃棄する請求項2または3の無線通信装置。
- 前記MAC PDU解析部は、入力されたMAC PDUのサイズまたはMAC PDUサブヘッダ内のLフィールドの値の和が所定の上限値を超えた場合、当該MAC PDUを廃棄する請求項2から4いずれか一の無線通信装置。
- Medium Access Controlレイヤ(MACレイヤ)における、MACレイヤのデータ処理単位(PDU)に付された誤り検出符号を用いた誤り検出処理の完了を待たずに、Radio Link Controlレイヤ(RLCレイヤ)にて、RLCレイヤのデータ処理単位であるRLC data PDUを解析してバッファしておくステップと、
RLCレイヤで、前記MACレイヤにおけるMAC PDUの誤り検出処理の結果を参照して、誤りのなかったRLC data PDUを用いて、RLC Service Data Unit(RLC SDU)を作成するステップと、を含むこと、
を特徴とするデータ受信方法。 - さらに、入力されたMAC PDUのサブヘッダ数が所定の上限値を超えた場合、当該MAC PDUを廃棄するステップを含む請求項6のデータ受信方法。
- さらに、入力されたMAC PDUのサイズまたはMAC PDUサブヘッダ内のLフィールドの値の和が所定の上限値を超えた場合、当該MAC PDUを廃棄するステップを含む請求項6または7のデータ受信方法。
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US13/321,899 US8869002B2 (en) | 2009-05-27 | 2010-05-27 | Wireless communication device and data reception method |
JP2011516049A JP5201265B2 (ja) | 2009-05-27 | 2010-05-27 | 無線通信装置およびデータ受信方法 |
CN201080023075.1A CN102450051B (zh) | 2009-05-27 | 2010-05-27 | 无线通信装置以及数据接收方法 |
KR1020117030966A KR101301323B1 (ko) | 2009-05-27 | 2010-05-27 | 무선 통신 장치 및 데이터 수신 방법 |
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US10999019B2 (en) * | 2017-03-31 | 2021-05-04 | Samsung Electronics Co., Ltd. | Apparatus and buffer control method thereof in a wireless communication system |
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- 2010-05-27 WO PCT/JP2010/058987 patent/WO2010137644A1/ja active Application Filing
- 2010-05-27 KR KR1020117030966A patent/KR101301323B1/ko not_active IP Right Cessation
- 2010-05-27 CN CN201080023075.1A patent/CN102450051B/zh not_active Expired - Fee Related
- 2010-05-27 JP JP2011516049A patent/JP5201265B2/ja not_active Expired - Fee Related
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JP5201265B2 (ja) | 2013-06-05 |
CN102450051B (zh) | 2014-12-03 |
US8869002B2 (en) | 2014-10-21 |
US20120063328A1 (en) | 2012-03-15 |
JPWO2010137644A1 (ja) | 2012-11-15 |
CN102450051A (zh) | 2012-05-09 |
KR101301323B1 (ko) | 2013-08-29 |
KR20120024845A (ko) | 2012-03-14 |
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