WO2004004195A1 - 受信装置及び通信方法 - Google Patents
受信装置及び通信方法 Download PDFInfo
- Publication number
- WO2004004195A1 WO2004004195A1 PCT/JP2003/007956 JP0307956W WO2004004195A1 WO 2004004195 A1 WO2004004195 A1 WO 2004004195A1 JP 0307956 W JP0307956 W JP 0307956W WO 2004004195 A1 WO2004004195 A1 WO 2004004195A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- packet
- likelihood
- combined
- combining
- error
- Prior art date
Links
Classifications
-
- 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
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1835—Buffer management
- H04L1/1845—Combining techniques, e.g. code combining
-
- 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
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
Definitions
- the present invention relates to a receiving apparatus and communication method used in a wireless communication system to which ARQ (Automatic Repeat Request) is applied.
- ARQ Automatic Repeat Request
- ARQ is used to improve data reception performance.
- a R Q is a method of automatically performing processing in which the transmitting side retransmits a data unit (frame) in which an error is detected on the receiving side. Then, in the conventional ARQ system, there is disclosed a system in which the receiving side combines the already received packet and the retransmitted packet and performs error correction processing on the synthetic packet.
- An object of the present invention is to provide a receiving apparatus and a communication method capable of preventing deterioration of A R Q performance even if the radio channel quality is deteriorated.
- FIG. 1 is a block diagram showing the configuration of a receiving apparatus according to Embodiment 1 of the present invention
- FIG. 2 is a diagram for specifically explaining ARQ in Embodiment 1 of the present invention
- FIG. FIG. 4 is a block diagram showing a configuration of a receiving apparatus according to Embodiment 2 of the invention
- FIG. 4 is a diagram for specifically explaining ARQ of Embodiment 2 of the present invention
- FIG. 5 is an embodiment of the present invention.
- FIG. 6 is a diagram for specifically explaining A R Q of the third embodiment of the present invention.
- FIG. 1 is a block diagram showing a configuration of a receiving apparatus according to Embodiment 1 of the present invention.
- the receiving apparatus 100 shown in FIG. 1 includes an antenna 101, a receiving RF unit 102, a demodulating unit 103, a combining unit 104, a likelihood calculating unit 105, and combining determination.
- Section 1 06 Switch 1 0 7, Notch 1 0 8, Error Correction / Decoding Unit 1 0 9, Error Detection Unit 1 1 0, Switch 1 1 1, Modulation Unit 1 1 2 and Transmission And an RF unit 113.
- Reception RF section 102 performs predetermined radio processing on the signal received by antenna 101, and outputs a baseband signal to demodulation section 103.
- Demodulation section 103 demodulates the output signal of reception RF section 102, and outputs the result to combining section 104 and likelihood calculation section 105.
- Combining section 104 combines the output signal of demodulation section 103 with the signal stored in buffer 108, and outputs the combined signal to switch 100.
- the likelihood calculation unit 105 calculates the likelihood of the output signal of the demodulation unit 103, and outputs information indicating the likelihood to the combination determination unit 106.
- the combination determination unit 106 compares the likelihood calculated in the likelihood calculation unit 105 with the threshold value Th 1 set in advance, and the likelihood is greater than the threshold value Th 1 In this case, connect switch 1 0 7. As a result, whether the likelihood is greater than the threshold Th 1 In this case, the signal combined by the combining unit 104 is input to the buffer 108 and the error correction decoding unit 109. On the other hand, when the likelihood is less than or equal to the threshold Th 1, the combination determination unit 106 outputs a signal (NACK signal) of a command requesting retransmission to the modulation unit 1 12.
- the buffer 108 outputs the stored signal to the combining unit 104, and overwrites and stores the signal when a new signal is input through the switch 107.
- the error correction decoding unit 109 performs error correction decoding processing such as Viterbi decoding on the signal input through the switch 107 and outputs the result to the error detection unit 110.
- the error detection unit 110 performs error detection (CRC determination) on the output signal of the error correction decoding unit 109, and when an error is detected, modulates the signal (NACK signal) of the command requesting retransmission. 1 Output to 1 2.
- CRC determination error detection
- the error detection unit 1 10 erases the signal stored in the buffer 108, connects the switch 1 1 1 and transmits a command signal requesting transmission of a new bucket (A CK Signal) is output to modulator 1 1 2.
- a CK Signal command signal requesting transmission of a new bucket
- Modulating section 112 modulates the NACK signal output from combination determination section 106 or error detection section 110 or the ACK signal output from error detection section 110 and outputs the result to transmission RF section 113.
- the transmission RF unit 1 13 converts the output signal of the modulation unit 1 12 into a radio frequency and transmits the radio signal from the antenna 101.
- the receiving device 100 first receives a new packet 201.
- the receiving device 100 calculates the likelihood of the bucket 201 by the likelihood calculating unit 105, and the magnitude of the likelihood is compared with the threshold Th 1 by the combination determining unit 106. Assuming that the likelihood is less than or equal to the threshold Th 1 as a result of the comparison, the receiving device 100 receives It is judged that the buckett 201 is received in a state where the quality is deteriorated, and the error correction decoding process and the error detection process are not performed on the buckett 201, and the NACK signal 251 is transmitted to the transmission device of the communication partner.
- the state of the wireless channel quality at the time of receiving the buckett is judged by comparing the likelihood of the demodulated reception buckett with the predetermined threshold value, and only the received buckett is synthesized with the wireless channel quality being good. It is possible to prevent deterioration of the quality of the post-synthesis bucket and to prevent the deterioration of ARQ performance.
- the threshold value Th 1 used in the combination determination unit is described as a preset value, the present invention is not limited thereto.
- an error rate is detected and the error rate is constant.
- the threshold Th 1 may be variably controlled such as setting the threshold Th 1 to be a value of.
- FIG. 3 is a block diagram showing a configuration of a receiving apparatus according to Embodiment 2 of the present invention.
- the same components as in the receiving device 1 00 shown in FIG. 1 are assigned the same reference numerals as in FIG.
- the receiver 300 shown in FIG. 3 has a configuration in which a switch 301 and a buffer 302 are added as compared with FIG. Further, the receiving apparatus 300 in FIG. 3 differs from the combining determining section 106 in FIG. 1 in the operation of the combining determining section 303.
- Demodulation section 103 demodulates the output signal of reception RF section 102 and outputs it to combining section 104.
- Combining section 104 combines the output signal of demodulation section 103 with the signal stored in buffer 108, and outputs the combined signal to likelihood calculating section 105 and switch 107.
- the likelihood calculating unit 105 calculates the likelihood of the signal synthesized by the synthesizing unit 104, and outputs information indicating the likelihood to the switch 301 and the synthesizing judging unit 303.
- the buffer 3 0 2 outputs the stored likelihood information to the synthesis determination unit 3 0 3 and overwrites the likelihood information when new likelihood information is input through the switch 3 0 1 Do.
- the synthesis determination unit 3 0 3 has the likelihood calculated by the likelihood calculation unit 1 0 5 (hereinafter referred to as “current likelihood”) and the likelihood stored in the buffer 3 0 2 (hereinafter referred to as “last time And the likelihood of this time was greater than the previous one.
- current likelihood the likelihood calculated by the likelihood calculation unit 1 0 5
- last time the likelihood stored in the buffer 3 0 2
- switches 107 and 301 are connected, and if the current likelihood is less than the previous likelihood, a signal (NACK signal) of a command requesting retransmission is output to modulation section 112.
- NACK signal a signal of a command requesting retransmission
- the information indicating the likelihood calculated by the likelihood calculating unit 105 is input to the buffer 302, and the signal synthesized by the synthesizing unit 104 is
- the buffer 108 and the error correction decoder 109 are input.
- the likelihood of the combined packet (401 + 402 + 403) is calculated at 05, and the combining determination unit 303 compares the current likelihood with the previous likelihood. If, as a result of comparison, the current likelihood and the previous likelihood are less than or equal to the previous likelihood, the receiving apparatus 300 determines that the packet 403 has been received in a state where the radio channel quality has deteriorated, and
- the NACK signal 453 is transmitted to the transmitting apparatus of the other party of communication without performing the error correction decoding process and the error detection process for 1 + 402 + 403).
- the receiver 300 erases the contents of the buffer 108 and the buffer 302, and transmits an ACK signal 454 to the transmitter of the communication counterpart.
- the state of the wireless channel quality at the time of bucket reception is determined by comparing the magnitude of the current likelihood and the previous likelihood, and combining is performed by combining only the buckett received in a state of good wireless channel quality. It prevents the deterioration of the quality of the later bucket and prevents the deterioration of the performance of ARQ.
- FIG. 5 is a block diagram showing a configuration of a receiving apparatus according to Embodiment 3 of the present invention.
- the receiving apparatus 500 shown in FIG. 5 the receiving apparatus 100 shown in FIG.
- the same reference numerals as in FIG. 1 are attached to the same components as in FIG.
- the SIR measurement unit 501 measures the ratio (SIR) of the desired wave level to the interference wave level, and outputs information indicating the SIR to the SIR judgment unit 502.
- the SIR determination unit 502 compares the SIR measured by the SIR measurement unit 50.1 with the threshold value Th2 set in advance, and the SIR is larger than the threshold value Th2.
- the switch 1 0 7 is connected, and if the SIR is less than the threshold value Th 2, a signal (NACK signal) of a command requesting retransmission is output to the modulator 1 1 2.
- S I R is larger than the threshold: ⁇ h 2
- the signal synthesized by the synthesis unit 104 is input to the multiplexer 1 0 8 and the error correction decoding unit 1 0 9.
- a R Q of this embodiment will be specifically described with reference to FIG. In FIG. 6, it is assumed that the receiver 500 receives a new packet 601 first.
- the receiver 500 measures the SIR (desired signal to interference wave ratio) of the bucket 601 with the SIR measurement unit 501, and with the SIR judgment unit 502, the SIR and the threshold direct path h2 Compare the size. As a result of comparison, assuming that the SIR is larger than the threshold value Th 2, the receiving apparatus 500 stores the packet 6001 in the buffer 108, and the error correction decoding unit 1010 adjusts the packet 6001. The error correction decoding process is performed, and the error detection process is performed in the error detection unit 110. As a result, assuming that an error is detected (C R C-N G), the receiving device 500 transmits the NACK signal 6 51 to the transmitting device of the communication partner.
- SIR secondary signal to interference wave ratio
- the receiving apparatus 500 receives the retransmission packet 602, and the combining section 104 combines the packet 6001 and the packet 602, and the SIR measuring section 501 analyzes the packet.
- Measure the SIR of 2002 and the SIR judgment unit 502 measures the SIR and the threshold Th 2 Compare the size.
- the receiver 500 stores the combined packet (601 + 602) in the buffer 108, and the error correction decoding unit 109 compares the combined packet (601 + 602).
- the error correction decoding process is performed, and the error detection unit 110 performs an error detection process.
- the receiver 500 transmits a NACK signal 652 to the transmitter of the communication partner.
- the state of the radio channel quality at the time of packet reception is determined by comparing the magnitude of the SIR with a predetermined threshold value, and only the buckett received with the radio channel quality in a good state is synthesized. Prevent the quality from deteriorating It is possible to prevent the degradation of ARQ performance.
- the threshold value Th 2 used in the combination determination unit is described as a preset value, the present invention is not limited thereto.
- an error rate is detected, and the error rate is constant.
- the threshold value Th 2 may be variably controlled such as setting the threshold value Th 2 to be a value.
- the receiving apparatus calculates a desired wave-to-interference wave ratio of a second synthesized buckett obtained by combining the first synthesized packet synthesized in the past and the received packet, and the desired wave-to-interference wave ratio of the second synthesized buckett is It is also possible to select a receiving buckett larger than the desired wave-to-interference wave ratio of one buckett, and to perform error detection on a synthesized buckett that combines the selected bucketts.
- the state of the radio channel quality at the time of packet reception is determined, and only the buckett received with the radio channel quality in a good state is synthesized. Prevent the degradation of packet quality,
- the present invention is suitable for use in a communication terminal apparatus or base station apparatus of a wireless communication system to which ARQ is applied.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003244164A AU2003244164A1 (en) | 2002-07-01 | 2003-06-24 | Receiver apparatus and communication method |
US10/489,969 US7076718B2 (en) | 2002-07-01 | 2003-06-24 | Receiver apparatus and communication method |
EP03761779A EP1519508B1 (en) | 2002-07-01 | 2003-06-24 | Receiver apparatus and communication method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002-192209 | 2002-07-01 | ||
JP2002192209A JP3499548B1 (ja) | 2002-07-01 | 2002-07-01 | 受信装置及び通信方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004004195A1 true WO2004004195A1 (ja) | 2004-01-08 |
Family
ID=29996962
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/007956 WO2004004195A1 (ja) | 2002-07-01 | 2003-06-24 | 受信装置及び通信方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7076718B2 (ja) |
EP (1) | EP1519508B1 (ja) |
JP (1) | JP3499548B1 (ja) |
CN (1) | CN1298131C (ja) |
AU (1) | AU2003244164A1 (ja) |
WO (1) | WO2004004195A1 (ja) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
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JP4032065B2 (ja) * | 2003-05-27 | 2008-01-16 | 富士通株式会社 | 受信装置およびハイブリッドarq通信システム |
JP4446338B2 (ja) | 2004-03-22 | 2010-04-07 | ソニー・エリクソン・モバイルコミュニケーションズ株式会社 | 再送要求方法、無線通信システム、および受信機 |
JP4501566B2 (ja) * | 2004-07-13 | 2010-07-14 | 富士通株式会社 | 無線通信装置及び移動局 |
JP2006129018A (ja) * | 2004-10-28 | 2006-05-18 | Fujitsu Ltd | 無線通信装置及び移動局 |
US20060198442A1 (en) * | 2004-12-28 | 2006-09-07 | Curt Jutzi | Method, apparatus and system for frame level recovery using a collection of badly received frames |
US8347161B2 (en) * | 2005-09-23 | 2013-01-01 | Electronics And Telecommunications Research Institute | MIMO system performing hybrid ARQ and retransmission method thereof |
KR100842583B1 (ko) * | 2005-11-21 | 2008-07-01 | 삼성전자주식회사 | 통신 시스템에서 데이터 수신 방법 및 장치 |
KR100792349B1 (ko) * | 2005-12-11 | 2008-01-07 | 이상범 | 양방향 무선통신 시스템 |
US7562278B2 (en) * | 2005-12-29 | 2009-07-14 | Intel Corporation | Incremental forward error correction redundancy |
US8205127B2 (en) * | 2005-12-30 | 2012-06-19 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and arrangement for HARQ in wireless multi-carrier systems |
US7734942B2 (en) * | 2006-12-28 | 2010-06-08 | Intel Corporation | Enabling idle states for a component associated with an interconnect |
KR101246807B1 (ko) | 2007-02-15 | 2013-03-26 | 삼성전자주식회사 | 통신시스템에서 하이브리드 자동재전송요청 수행 장치 및방법 |
JP5013617B2 (ja) * | 2008-07-24 | 2012-08-29 | シャープ株式会社 | 通信装置、通信システムおよび受信方法 |
WO2011046088A1 (ja) * | 2009-10-16 | 2011-04-21 | Quadrac株式会社 | 無線通信システム、送信装置、受信装置、受信方法、及び送信方法 |
DE102010046023B4 (de) * | 2010-09-20 | 2015-10-22 | Rohde & Schwarz Gmbh & Co. Kg | 3 - 9Funkgerät und Verfahren zur Funkkommunikation mit geringer Latenzzeit |
KR101625213B1 (ko) * | 2010-12-21 | 2016-06-07 | 한국전자통신연구원 | 위성 단말장치와 통신하는 중심국에서의 역방향링크 패킷 오류 판단방법 및 그 판단장치 |
JP5689544B2 (ja) * | 2011-03-01 | 2015-03-25 | エイ・エス−インターナショナル・アソシエーション・アインゲトラーゲナー・フェラインAs−International Association E.V. | デジタルデータを送信するためのエラー訂正およびエラー検出の新規な組合せ |
JP5673388B2 (ja) * | 2011-06-23 | 2015-02-18 | 富士通株式会社 | 無線装置及び無線通信制御プログラム |
CN113360812B (zh) | 2016-03-07 | 2024-02-06 | 创新先进技术有限公司 | 一种业务执行方法及装置 |
WO2018054171A1 (zh) * | 2016-09-22 | 2018-03-29 | 腾讯科技(深圳)有限公司 | 通话方法、装置、计算机存储介质及终端 |
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2002
- 2002-07-01 JP JP2002192209A patent/JP3499548B1/ja not_active Expired - Lifetime
-
2003
- 2003-06-24 AU AU2003244164A patent/AU2003244164A1/en not_active Abandoned
- 2003-06-24 WO PCT/JP2003/007956 patent/WO2004004195A1/ja active Application Filing
- 2003-06-24 CN CNB038012723A patent/CN1298131C/zh not_active Expired - Lifetime
- 2003-06-24 EP EP03761779A patent/EP1519508B1/en not_active Expired - Lifetime
- 2003-06-24 US US10/489,969 patent/US7076718B2/en not_active Expired - Lifetime
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WO1998049796A2 (en) | 1997-04-28 | 1998-11-05 | Nokia Mobile Phones Limited | Method for transmitting packet switched data in a mobile communications system |
WO2000021236A1 (en) * | 1998-10-08 | 2000-04-13 | Telefonaktiebolaget Lm Ericsson (Publ) | Data communication method and system using an adaptive hybrid-arq scheme |
JP2001053728A (ja) | 1999-06-03 | 2001-02-23 | Matsushita Electric Ind Co Ltd | 通信端末装置及び無線通信方法 |
JP2001119426A (ja) | 1999-10-15 | 2001-04-27 | Ntt Docomo Inc | 誤り制御方法及びその方法を使用する通信システム |
EP1168703A2 (en) | 2000-06-26 | 2002-01-02 | NTT DoCoMo, Inc. | Communication system employing automatic repeat request |
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Title |
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See also references of EP1519508A4 * |
Also Published As
Publication number | Publication date |
---|---|
JP2004040315A (ja) | 2004-02-05 |
CN1298131C (zh) | 2007-01-31 |
EP1519508B1 (en) | 2012-09-12 |
EP1519508A1 (en) | 2005-03-30 |
CN1568596A (zh) | 2005-01-19 |
EP1519508A4 (en) | 2010-07-28 |
JP3499548B1 (ja) | 2004-02-23 |
AU2003244164A1 (en) | 2004-01-19 |
US20040255203A1 (en) | 2004-12-16 |
US7076718B2 (en) | 2006-07-11 |
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