WO2007148635A1 - 移動通信システムで使用される無線通信装置及び方法 - Google Patents
移動通信システムで使用される無線通信装置及び方法 Download PDFInfo
- Publication number
- WO2007148635A1 WO2007148635A1 PCT/JP2007/062178 JP2007062178W WO2007148635A1 WO 2007148635 A1 WO2007148635 A1 WO 2007148635A1 JP 2007062178 W JP2007062178 W JP 2007062178W WO 2007148635 A1 WO2007148635 A1 WO 2007148635A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- packet
- error detection
- detection result
- communication partner
- dummy data
- 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
-
- 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
- H04L1/1867—Arrangements specially adapted for the transmitter end
-
- 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
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
- H04L1/0079—Formats for control data
- H04L1/0081—Formats specially adapted to avoid errors in the feedback channel
-
- 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
- H04L1/1607—Details of the supervisory signal
- H04L1/1671—Details of the supervisory signal the supervisory signal being transmitted together with control information
- H04L1/1678—Details of the supervisory signal the supervisory signal being transmitted together with control information where the control information is for timing, e.g. time stamps
-
- 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
-
- 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
-
- 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
- H04L2001/125—Arrangements for preventing errors in the return channel
Definitions
- the present invention relates to the technical field of mobile communication, and more particularly to a radio communication apparatus and method used in a mobile communication system.
- next-generation mobile communication systems including radio access methods, retransmission control, handover, and the like are proceeding at a rapid pace.
- FIG. 1 shows an example of a retransmission control procedure.
- the right side of the figure shows the medium access control (MAC:
- TxMAC entity
- RLC radio link control sublayer entity
- TxRLC Medium Access Control
- the left side of the figure shows the operations of the receiving MAC sublayer entity (RxMAC) and RLC sublayer entity (RxRLC).
- RxMAC receiving MAC sublayer entity
- RxRLC RLC sublayer entity
- a packet to be transmitted is prepared.
- a packet to be transmitted is requested from the MAC sublayer to the RLC sublayer (new data request) 0
- a transmission packet is prepared in the MAC sublayer in response to this request.
- the packet prepared on the transmission side is transmitted to the reception side.
- the packet data unit including user data specified by the sequence number (SN) is transmitted on the data channel, and the user identification information (UE—ID), process number (Proc), and new data indicator (NDI: New Data Indicator)
- UE—ID user identification information
- Proc process number
- NDI new data indicator
- SFN system frame number
- the receiver that has received the control channel and the data channel together with the broadcast channel performs error detection on the received packet by, for example, cyclic redundancy check (CRC).
- the error detection result must be negative (NACK) or positive.
- ACK ACK
- the former indicates that an error exceeding the allowable range has been detected, and the latter indicates the opposite.
- an error is detected (CRC: NG).
- step S12 the error detection result is reported to the transmission side.
- the sender identifies the packet associated with the negative response according to the negative error detection result, and retransmits it. Packets transmitted from the transmission side are stored in the buffer (retransmission buffer) even after wireless transmission, and are discarded when a positive error detection result (ACK) is obtained. Therefore, if a negative error detection result is reported, the previously transmitted packet is identified accordingly and retransmitted.
- ACK positive error detection result
- a negative acknowledgment (NACK) is transmitted in step S12. Therefore, the transmission side should also confirm that fact and perform appropriate retransmission.
- the transmitting side (TxMAC) may be misidentified as reporting a positive error detection result.
- the processing is proceeding on the assumption that the transmitting side has reported a positive response.
- the receiver refers to the process number (Proc), the new data indicator (NDI), etc., and confirms that a new packet that is not a retransmission packet is being transmitted even though a negative response was returned in the past. To do. As a result, it is possible to detect that the negative response is erroneously being processed as an affirmative response.
- This indicator may be referred to as a False Ack Indicator (FAI).
- the packet frame transmitted at the timing of the system frame number (SFN 3)
- the Kens number is 0. This is stored on the transmission side.
- the sequence number of the packet to be retransmitted is identified from the system frame number reported in this way.
- the steps after step S26 are not drawn.
- Non-Patent Document 1 R2- 050907, "MACsch: ARQ”, Samsung.
- a poll bit is prepared for each packet, and the content of the bit can be used to distinguish whether it is the final packet or not.
- a packet with a poll bit of a predetermined value for example, 1
- it indicates that it is the final packet and the error detection results for all the previously received packets are collectively sent to the transmitting side. Sent.
- An object of the present invention is to unify detection methods for erroneous recognition of error detection results and to enhance a retransmission control function.
- a wireless communication device having a retransmission control function is used.
- FIG. 1 is a flowchart showing an operation procedure for dealing with a conventional ACK / NACK misidentification.
- FIG. 2 is a flowchart showing an operation procedure according to an embodiment of the present invention.
- FIG. 3 shows a functional block diagram for an entity used in an embodiment of the present invention. Explanation of symbols
- FIG. 2 is a flowchart showing an operation procedure according to an embodiment of the present invention.
- the illustrated operation may be used for the uplink or the downlink.
- the transmitter is a base station and the receiver is a user equipment.
- the transmitter is a user equipment and the receiver is a base station.
- the transmitter is a base station and the receiver is a user device.
- steps S21 and S22 a packet to be transmitted is prepared.
- a packet to be transmitted is requested from the MAC sublayer to the RLC sublayer.
- a transmission packet is prepared in the MAC sublayer in response to this request.
- the packet prepared on the transmission side is transmitted to the reception side.
- the packet data unit including user data specified by the sequence number (SN) is transmitted on the data channel, and the user identification information (UE—ID), process number (Proc), new data indicator (NDI), Transmission format information used for data channel restoration and other control information are transmitted on the control channel, and the system frame number (SFN) indicating the absolute transmission timing in the cell may be broadcast on the broadcast channel. Is used.
- the receiver that has received the control channel and the data channel together with the broadcast channel performs error detection on the received packet, for example, by the CRC method.
- the error detection result indicates negative (NACK) or positive (ACK).
- the former indicates that an error exceeding the allowable range has been detected, and the latter indicates the opposite.
- an error has been detected (CRC: NG).
- step S12 the error detection result is reported to the transmission side.
- NACK negative acknowledgment
- the transmission side should also confirm that fact and perform appropriate retransmission.
- the transmission side TxMAC
- the processing is proceeding on the assumption that the transmitting side has reported a positive response.
- step S24 TxMAC is notified that there is no subsequent packet.
- the timing at which the notification that there is no subsequent packet is transmitted from step S24 is preferably after a predetermined period has elapsed since the reception of the request in step S23.
- the predetermined period is set longer than, for example, the arrival interval of packets arriving at the TxRLC sublayer. It is desirable. Furthermore, since the arrival interval may vary depending on the application, the predetermined period may also vary depending on the application.
- the receiver extracts the incidental information by receiving the packet containing dummy data.
- a transmission packet including dummy data may be transmitted while specifying the type of a control packet data unit (Control PDU), for example.
- Control PDU control packet data unit
- each type may be distinguished and the control packet data unit may be used differently so that type 1 indicates dummy data and type 2 indicates FAI.
- the receiver refers to the process number (Proc), the new data indicator (NDI), etc., and has returned a negative response in the past, but is not a retransmitted packet (a pseudo new data including dummy data). Confirm that the packet)) is being transmitted. As a result, it is possible to detect that the negative response is erroneously being processed as an affirmative response.
- an indicator is created that contains the SFN of the latest control channel that was properly received.
- This The cater is reported to the sender as shown in step S14.
- This indicator may also be referred to as a False Ack Indicator (FAI).
- FAI False Ack Indicator
- step S14 in Fig. 1 a signal called FAI is also transmitted.
- the FAI used in this embodiment includes the latest control channel SFN, the FAI described in Fig. 1 is not the latest SFN, but the SFN of the packet to be retransmitted (transmitted together with the retransmission target). Special attention should be paid to the fact that the significance of FAI is significantly different.
- the system frame number of the same process number addressed to the current user identification information (referred to as the preceding system frame number for convenience) is 3. This is stored on the sending side.
- the retransmission buffer is managed in the RLC sublayer, and the transmitted packet is held together with attribute information associated therewith until an acknowledgment is reported.
- the accompanying attribute information includes, for example, user identification information (UE-ID), packet sequence number (SN), system frame number (SFN) that specifies transmission timing, and process number (Proc) that specifies process number. May be included.
- UE-ID user identification information
- SN packet sequence number
- SFN system frame number
- Process number Proc
- step S26 the steps after step S26 are not drawn.
- the system frame number (SFN) may represent a minimum time unit such as a radio packet transmission unit (for example, 1.0 ms), or may correspond to a larger time unit. Yo ⁇ . In the latter case, when signal processing is performed in the minimum time unit, some information corresponding to a period shorter than the system frame number (SFN) is required. As some information, for example, a subframe number may be used. For example, if the SFN is in units of 10 ms, 10 subframes of 1.0 ms are included in it. In this case, processing can be performed in units of time shorter than SFN using subframe numbers 0 to 9. Other values such as a force of 0.5 ms, which is typically 1.0 ms, which may be called a transmission time interval (TTI) may be used for the subframe.
- TTI transmission time interval
- FIG. 3 shows a functional block diagram for an entity used in one embodiment of the present invention.
- the operations shown in FIG. 2 are realized by the functional units of these entities.
- the receiving side RxMAC includes a receiving unit 11, an ACK / NACK determining unit 12, an error detecting unit 13, and an FAI creating unit 14.
- the TxMAC on the transmission side includes a new data request unit 21, a new Z dummy packet creation unit 22, a transmission unit 23, and an FAI analysis unit 24.
- the transmission side TxRLC has a transmission buffer management unit 31.
- the RxMAC receiving unit 11 on the receiving side receives the radio signal, extracts the signal addressed to itself, and transfers it to the subsequent processing element.
- the RxMAC receiver 11 notifies the error detector 13 of the process number (Proc), the value of the new data indicator (NDI), and the system frame number (SFN) associated with the received control channel addressed to its own device. .
- the ACK / NACK determination unit 12 performs error detection on the received signal. Error detection may be performed by the CRC method, for example. The error detection result is reported not only to the error detection unit 13 but also to the transmitting side.
- the error detection unit 13 determines whether or not it has failed to receive the control channel in the past. If it turns out that it has failed, the FAI creation unit 14 is instructed to create the FAI.
- the FAI creation unit 14 creates an indicator including a system frame number (SFN) of a recently received packet.
- SFN system frame number
- the TxMAC new data request unit 21 of the transmitter receives an error detection result (ACK / NAC K) report from the receiver. According to the report contents, the transmission buffer management unit 31 is requested for data to be transmitted at the next transmission timing. However, the new data request unit 21 includes dummy data. When an error detection result report for a packet is received, the transmission buffer management unit 31 is not requested for data to be transmitted at the next transmission timing. That is, the new data request unit 21 also has a function of prohibiting such a request.
- the new Z dummy packet creation unit 22 creates a transmission packet for wirelessly transmitting a new packet or dummy packet to be transmitted at the next transmission timing.
- the transmitted packet constitutes a control channel and a data channel.
- the transmission unit 23 transmits the created transmission packet.
- the FAI analysis unit 24 receives the indicator created on the receiving side, and extracts the system frame number (SFN) included in the indicator.
- SFN system frame number
- the transmission buffer management unit 31 of the TxRLC on the transmission side accumulates packet data to be transmitted wirelessly in a buffer, extracts the packet data as necessary, and sends it to the transmission packet creation unit 22.
- the nofer stores not only the initial transmission packet data but also the retransmission packet data.
- the packet data for retransmission is stored together with attribute information associated therewith.
- a pseudo subsequent packet including dummy data is transmitted, regardless of whether or not the received packet is the final packet.
- the present invention may be used for the uplink or the downlink.
- the transmitter is a base station and the receiver is a user equipment.
- the system frame number (SFN) is transmitted as broadcast information
- the process number (Proc), new data indicator (NDI), and user ID (UE-ID) are transmitted as control information.
- the transmitter is a user equipment and the receiver is a base station.
- the SFN is specified by the SFN at the time of reception by the base station.
- Proc can also identify the identified SFN force (as an example, by performing a predetermined modulo operation on SFN).
- the base station can identify the uplink scheduling power as well. In scheduling userling, it is determined which user is allowed to transmit which uplink packet and which resource, and the base station stores the determined contents to identify the NDI, UE-ID, etc. of the received packet. Can be determined.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Communication Control (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07745432A EP2034653A4 (en) | 2006-06-20 | 2007-06-15 | RADIO COMMUNICATION DEVICE AND METHOD USED IN A MOBILE COMMUNICATION SYSTEM |
CN2007800307037A CN101507318B (zh) | 2006-06-20 | 2007-06-15 | 移动通信系统中使用的无线通信装置及方法 |
JP2008522438A JP5020952B2 (ja) | 2006-06-20 | 2007-06-15 | 移動通信システムで使用される無線通信装置及び方法 |
US12/305,602 US8136004B2 (en) | 2006-06-20 | 2007-06-15 | Radio communication apparatus and method used in mobile communication system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006170703 | 2006-06-20 | ||
JP2006-170703 | 2006-06-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007148635A1 true WO2007148635A1 (ja) | 2007-12-27 |
Family
ID=38833377
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/062178 WO2007148635A1 (ja) | 2006-06-20 | 2007-06-15 | 移動通信システムで使用される無線通信装置及び方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US8136004B2 (ja) |
EP (1) | EP2034653A4 (ja) |
JP (1) | JP5020952B2 (ja) |
KR (1) | KR20090025331A (ja) |
CN (1) | CN101507318B (ja) |
TW (1) | TW200810417A (ja) |
WO (1) | WO2007148635A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009188660A (ja) * | 2008-02-05 | 2009-08-20 | Mitsubishi Electric Corp | 移動局、基地局及び通信制御方法 |
JP2012501107A (ja) * | 2008-08-21 | 2012-01-12 | クゥアルコム・インコーポレイテッド | システム時間ロールオーバにおいて、中断した同期ハイブリッド自動反復要求(harq)サイクルの取り扱い |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110130825A1 (en) | 2009-12-01 | 2011-06-02 | Altura Medical, Inc. | Modular endograft devices and associated systems and methods |
WO2012040240A1 (en) | 2010-09-20 | 2012-03-29 | Altura Medical, Inc. | Stent graft delivery systems and associated methods |
US9847889B2 (en) * | 2011-07-20 | 2017-12-19 | Cisco Technology, Inc. | Packet trains to improve packet success rate in carrier sense multiple access networks |
JP6326648B2 (ja) | 2012-08-10 | 2018-05-23 | アルツラ メディカル インコーポレイテッド | ステントデリバリシステム及び関連方法 |
US9737426B2 (en) | 2013-03-15 | 2017-08-22 | Altura Medical, Inc. | Endograft device delivery systems and associated methods |
WO2016041574A1 (en) * | 2014-09-16 | 2016-03-24 | Nokia Solutions And Networks Oy | Detection of a transmission error in a wireless network |
US10164737B2 (en) * | 2015-03-18 | 2018-12-25 | Infineon Technologies Ag | SPC sensor interface with partial parity protection |
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JPS58201465A (ja) * | 1982-05-19 | 1983-11-24 | Ricoh Co Ltd | フアクシミリ通信方式 |
JPH0832531A (ja) * | 1994-07-20 | 1996-02-02 | Hitachi Ltd | 同報通信方式 |
JPH10290234A (ja) * | 1997-04-17 | 1998-10-27 | Nec Corp | データ伝送システム |
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US6831912B1 (en) * | 2000-03-09 | 2004-12-14 | Raytheon Company | Effective protocol for high-rate, long-latency, asymmetric, and bit-error prone data links |
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- 2007-06-15 KR KR1020097000231A patent/KR20090025331A/ko not_active Application Discontinuation
- 2007-06-15 EP EP07745432A patent/EP2034653A4/en not_active Withdrawn
- 2007-06-15 CN CN2007800307037A patent/CN101507318B/zh not_active Expired - Fee Related
- 2007-06-15 JP JP2008522438A patent/JP5020952B2/ja not_active Expired - Fee Related
- 2007-06-15 WO PCT/JP2007/062178 patent/WO2007148635A1/ja active Application Filing
- 2007-06-15 US US12/305,602 patent/US8136004B2/en not_active Expired - Fee Related
- 2007-06-20 TW TW096122044A patent/TW200810417A/zh unknown
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009188660A (ja) * | 2008-02-05 | 2009-08-20 | Mitsubishi Electric Corp | 移動局、基地局及び通信制御方法 |
JP2012501107A (ja) * | 2008-08-21 | 2012-01-12 | クゥアルコム・インコーポレイテッド | システム時間ロールオーバにおいて、中断した同期ハイブリッド自動反復要求(harq)サイクルの取り扱い |
US8473799B2 (en) | 2008-08-21 | 2013-06-25 | Qualcomm Incorporated | Handling of disrupted synchronous hybrid automatic repeat request (HARQ) cycle at system time rollover |
Also Published As
Publication number | Publication date |
---|---|
EP2034653A4 (en) | 2012-12-26 |
TW200810417A (en) | 2008-02-16 |
US20090307553A1 (en) | 2009-12-10 |
CN101507318A (zh) | 2009-08-12 |
JP5020952B2 (ja) | 2012-09-05 |
US8136004B2 (en) | 2012-03-13 |
JPWO2007148635A1 (ja) | 2009-11-19 |
EP2034653A1 (en) | 2009-03-11 |
KR20090025331A (ko) | 2009-03-10 |
CN101507318B (zh) | 2012-03-28 |
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