WO2000013364A1 - Bidirectional arq apparatus and method - Google Patents
Bidirectional arq apparatus and method Download PDFInfo
- Publication number
- WO2000013364A1 WO2000013364A1 PCT/EP1998/005412 EP9805412W WO0013364A1 WO 2000013364 A1 WO2000013364 A1 WO 2000013364A1 EP 9805412 W EP9805412 W EP 9805412W WO 0013364 A1 WO0013364 A1 WO 0013364A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- error
- transmission
- digital signal
- transmission medium
- rate
- 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
-
- 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
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
-
- 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
- H04L1/1803—Stop-and-wait protocols
-
- 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
- H04L1/1806—Go-back-N protocols
-
- 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
- H04L1/1809—Selective-repeat protocols
-
- 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
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
- H04L1/1819—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of additional or different redundancy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate
Definitions
- the present invention relates to an error control apparatus and method for a digital transmission system such as a General Packet Radio Services system (GPRS) having a transmission medium for performing transmission in a first and a second direction.
- GPRS General Packet Radio Services system
- transmission errors occur due to noise and distortion.
- transmission errors There are two types of transmission errors: random errors and burst errors. Random errors may be caused by thermal noise. Burst errors are generated during a fade in the transmission channel.
- Transmission errors can be detected by adding a redundant signal (check bits) to the information signal.
- a redundant signal check bits
- ARQ Automatic Repeat Request
- FEC Fee-Forward Error Correction
- a system employing an ARQ scheme requests a retransmission of the data received in error.
- the receiver sends an ACK signal to acknowledge a correct reception, and sends a NAK signal to request a retransmission of a coded signal block detected in error.
- the efficiency of transmission is low, since a confirmation of the received signal is made for every block of data.
- a coded data block is transmitted continuously. If the transmitter receives a NAK signal requesting a retransmission then the transmitter goes back by N data blocks and restarts the transmission from that data block.
- the time delay between the transmission of a data block and the reception of a NAK signal must be less than the time for the transmission of N data blocks.
- the idle time is shorter for this system than for the Stop-and-Wait ARQ system. However, it still wastes time, since N data blocks, which may include blocks with error, are transmitted for every retransmission.
- an erroneous block is stored and used as a diversity when retransmission occurs.
- a memory is required for the erroneous blocks.
- hybrid ARQ There are other techniques, known as hybrid ARQ systems, wherein a combination of an ARQ scheme and a forward error correction is used.
- a type II hybrid ARQ is known, wherein a data block is transmitted at first in a heavily punctured way, and in case of required retransmissions, the punctured bits are transmitted. This results in a good performance in one direction of transmission, but requires quite a lot acknowledge messaging in the other direction, reducing the possible data rate in that direction.
- an error control apparatus for a digital transmission system having a transmission medium for performing a transmission in a fist and a second direction, comprising: error detection means for detecting an error in a digital signal transmitted in said first direction via said transmission medium; transmitting means for transmitting a control message in said second direction via said transmission medium so as to request a retransmission of said digital signal, if said error detection means detects an error in said digital signal; and control means for controlling a transmission rate of said control message in dependence on an usage of said trans- mission medium in said second direction and/or an amount of available memory in a receiving means for receiving said digital signal.
- an error control method for a transmission system having a transmission medium for performing transmission in a first and a second direction comprising the steps of: detecting an error in a digital signal transmitted in said first direction via said transmission medium; transmitting a control message in said second direction via said transmission medium so as to request a retransmission of said digital signal if an error has been detected in said error detection step; and controlling a transmission rate of said control message in dependence on a usage of said transmission medium in said second direction and/or an amount of available memory in a receiving means for receiving said digital signal.
- the network capacity can be optimized by controlling the transmission rate of the control meassage so as to achieve high throughput rates.
- the throughput in one direction can be increased by allowing more messaging, i.e. a higher control message rate, in the other direction, if the usage of the other direction is low.
- the overall data throughput can be optimized by changing the rate of the control messages in accordance with the usage of the respective transmission directions.
- the transmission rate of the control message can be controlled on the basis of the available memory in the receiver, such that a lower transmission rate can be used if a larger memory for error processing is available in the receiver.
- an erroneous portion of the digital signal can be stored in a storing means and can be used for the diversity processing after the retransmission has been performed.
- a transmission method with a higher bit rate can be used due to the improved error correction efficiency, so as to increase the throughput rate.
- control means can be arranged to adjust the transmission rate in accordance with an available amount of memory in said storing means.
- a loss of erroneous signal portions required for the diversity processing can be prevented.
- control means can be arranged to reduce the transmission rate and to select another coding scheme which leads to a smaller amount of errors, when a signal transmission is performed in the second transmission direction.
- the overall throughput can be optimized by reducing the transmission rate of the control message and selecting a better coding scheme leading to a smaller amount of errors.
- Fig. 1 shows a principle block diagram of an error control apparatus according to the preferred embodiment of the present invention.
- Fig. 2 shows a flow diagram of an error control method according to the preferred embodiment of the present invention.
- FIG. 1 A principle block diagramm of a preferred embodiment of the present invention is shown in Fig. 1, wherein an adaptive ARQ error control method for a GPRS system is performed in a base station 10 of a GSM network.
- the base station 10 comprises a combining means 7 which is arranged to supply an uplink signal received via an uplink radio channel and an antenna from a mobile station to a receiver 5, and to supply a downlink signal generated in a transmitter 4 to the antenna in order to be transmitted via a downlink radio channel to a respective mobile station.
- a combining means 7 which is arranged to supply an uplink signal received via an uplink radio channel and an antenna from a mobile station to a receiver 5, and to supply a downlink signal generated in a transmitter 4 to the antenna in order to be transmitted via a downlink radio channel to a respective mobile station.
- an error detector 3 is provided for detecting an error according to a known error detection method, as described above.
- the error detector 3 is connected to a control means 6 such as a CPU or the like, so as to supply a signal indicating the occurrence of an error to the control means 6.
- the control means 6 is connected to the transmitter 4 so as to detect a usage or throughput of the transmission direction and to supply an ACK message or a NAK message to the transmitter 4, which message is to be transmitted in accordance with the detection result of the error detector 3 according to the known ARQ error control scheme.
- a codec 2 is provided in the base station
- error correction is performed according to the type II hybrid ARQ scheme or the ARQ error control scheme.
- the ARQ error control scheme provides the best performance in one direction, but requires more ACK/NAK messages in the other direction.
- the repetition with diversity ARQ method exhibits the best performance, when coding schemes with high error rates and high throughputs are used for data transmission. However, this also increases the amount of retransmissions. Since, according to this method, an erroneous block must be stored until it has been correctly received, a lot of memory is required if slow acknowledge rates are used. Thus, also in this case, the performance of the system (with finite amount of memory) is improved if the acknowledge rate is increased, or, otherwise, the memory requirement could be reduced.
- the acknowledge rate is changed according to the usage of the data transmission in the other direction.
- the message rate can be adjusted according to the available amount of memory in the mobile station or the base station.
- Fig. 2 shows a block diagram of the basic processing steps of the error control method performed in the preferred embodiment shown in Fig. 1.
- the received data block is supplied to the error detector 3 so as to perform an error detection processing (step S2).
- the error detector 3 supplies a corresponding signal to the control means 6 which subsequently generates a NAK message (step S4) to be transmitted in order to request a retransmission of the erroneous data block.
- step S5 the erroneous data block is stored in a memory provided in the base station 10 (step S5). It is to be noted, that step 5 is only required if the repetition with diversity ARQ method is performed.
- steps 4 and 5 are not performed, i.e. skipped.
- control means 6 detects the usage or data throughput in the downlink direction by referring to the transmitter 4 and determines a message rate for the acknowledge message, i.e. the ACK or NAK message, in accordance with the detected usage or throughput (step S6).
- an ACK message is transmitted at the determined message rate, if no error has been detected, and a NAK message is transmitted at the determined message rate, if an error has been detected by the error detector 3 , as indicated in step S7.
- the above processing is repeatedly performed as long as data blocks are received. It is to be noted that the same method and corresponding means may also be provided in the mobile station of the GSM system.
- the throughput rate can be increased if a coding scheme with a high bit rate is chosen (highly punctured), which leads to a big amount of erroneous or missed blocks.
- the higher bit rate compensates this loss and leads to an improvement.
- EDGE Enhanced Data rates for GSM Evolution
- step S6 may additionally or alternatively be performed in dependence on the amount of memory available in the mobile station to thereby optimize the overall data throughput.
- the downlink throughput can be further improved, if the above mentioned type II hybrid ARQ error control scheme is employed, which, however, increases the amount of acknowledgement messages even more.
- the acknowledgement messages reduce the possible data rate in the uplink direction.
- an optimum throughput can be achieved by reducing the message rate and selecting another coding scheme which leads to a smaller amount of a erroneous blocks and also decreases the memory requirement in the mobile station.
- the need for high data rates in the downlink and uplink transmission should be taken into account when designing the acknowledgement rates.
- An error control apparatus and method wherein a control message is used to request a retransmission of a received erroneous digital signal transmitted in a first direction via a transmission medium.
- the control message is transmitted in a second direction of said transmission medium, wherein the transmission rate of the control message is controlled in dependence on a usage of the transmission medium in the second direction and/or an amount of available memory in a receiving means for receiving said digital signal.
- the overall data throughput in the first and second directions can be optimized by changing the rate of the control message.
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98945289A EP1025666A1 (en) | 1998-08-26 | 1998-08-26 | Bidirectional arq apparatus and method |
PCT/EP1998/005412 WO2000013364A1 (en) | 1998-08-26 | 1998-08-26 | Bidirectional arq apparatus and method |
CN98810590A CN1277767A (en) | 1998-08-26 | 1998-08-26 | Bidirectional ARQ apparatus and method |
AU92652/98A AU9265298A (en) | 1998-08-26 | 1998-08-26 | Bidirectional arq apparatus and method |
JP2000568216A JP2002524918A (en) | 1998-08-26 | 1998-08-26 | Bidirectional ARQ apparatus and method |
US09/550,676 US6425105B1 (en) | 1998-08-26 | 2000-04-17 | Bidirectional ARQ apparatus and method |
NO20002095A NO20002095D0 (en) | 1998-08-26 | 2000-04-25 | Two-way ARQ apparatus and method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP1998/005412 WO2000013364A1 (en) | 1998-08-26 | 1998-08-26 | Bidirectional arq apparatus and method |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/550,676 Continuation US6425105B1 (en) | 1998-08-26 | 2000-04-17 | Bidirectional ARQ apparatus and method |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000013364A1 true WO2000013364A1 (en) | 2000-03-09 |
Family
ID=8167041
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1998/005412 WO2000013364A1 (en) | 1998-08-26 | 1998-08-26 | Bidirectional arq apparatus and method |
Country Status (6)
Country | Link |
---|---|
US (1) | US6425105B1 (en) |
EP (1) | EP1025666A1 (en) |
JP (1) | JP2002524918A (en) |
CN (1) | CN1277767A (en) |
AU (1) | AU9265298A (en) |
WO (1) | WO2000013364A1 (en) |
Cited By (4)
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EP1284549A1 (en) * | 2001-08-16 | 2003-02-19 | TELEFONAKTIEBOLAGET LM ERICSSON (publ) | A robust algorithm for transmission mode selection in Hiperlan/2 |
WO2003021903A1 (en) * | 2001-08-28 | 2003-03-13 | Sony Corporation | Transmitter and transmission control method |
WO2004006491A1 (en) * | 2002-07-08 | 2004-01-15 | Qualcomm, Incorporated | Improved feedback for data transmissions |
EP1885078A3 (en) * | 2006-08-02 | 2012-08-01 | Fujitsu Ltd. | Data communication system with delivery acknowledgement |
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JP2001142845A (en) * | 1999-11-17 | 2001-05-25 | Toshiba Corp | Computer system and data transfer control method |
KR100434459B1 (en) * | 2000-06-27 | 2004-06-05 | 삼성전자주식회사 | Method and apparatus for controlling transmission of data packet in mobile telecommunication system |
US6678523B1 (en) * | 2000-11-03 | 2004-01-13 | Motorola, Inc. | Closed loop method for reverse link soft handoff hybrid automatic repeat request |
FR2819661B1 (en) * | 2001-01-15 | 2003-03-28 | Nortel Networks | METHOD AND DEVICES FOR DATA TRANSMISSION WITH ACKNOWLEDGMENT MECHANISM |
US7007219B2 (en) * | 2002-01-11 | 2006-02-28 | Ncr Corporation | Methods and apparatus for error detection and correction of an electronic shelf label system communication error |
US7139274B2 (en) * | 2002-08-23 | 2006-11-21 | Qualcomm, Incorporated | Method and system for a data transmission in a communication system |
US8179833B2 (en) | 2002-12-06 | 2012-05-15 | Qualcomm Incorporated | Hybrid TDM/OFDM/CDM reverse link transmission |
US8081598B2 (en) | 2003-02-18 | 2011-12-20 | Qualcomm Incorporated | Outer-loop power control for wireless communication systems |
US8150407B2 (en) | 2003-02-18 | 2012-04-03 | Qualcomm Incorporated | System and method for scheduling transmissions in a wireless communication system |
US20040160922A1 (en) | 2003-02-18 | 2004-08-19 | Sanjiv Nanda | Method and apparatus for controlling data rate of a reverse link in a communication system |
US8023950B2 (en) | 2003-02-18 | 2011-09-20 | Qualcomm Incorporated | Systems and methods for using selectable frame durations in a wireless communication system |
US7155236B2 (en) | 2003-02-18 | 2006-12-26 | Qualcomm Incorporated | Scheduled and autonomous transmission and acknowledgement |
US7660282B2 (en) | 2003-02-18 | 2010-02-09 | Qualcomm Incorporated | Congestion control in a wireless data network |
US8391249B2 (en) | 2003-02-18 | 2013-03-05 | Qualcomm Incorporated | Code division multiplexing commands on a code division multiplexed channel |
US7215930B2 (en) | 2003-03-06 | 2007-05-08 | Qualcomm, Incorporated | Method and apparatus for providing uplink signal-to-noise ratio (SNR) estimation in a wireless communication |
US8705588B2 (en) | 2003-03-06 | 2014-04-22 | Qualcomm Incorporated | Systems and methods for using code space in spread-spectrum communications |
US8477592B2 (en) | 2003-05-14 | 2013-07-02 | Qualcomm Incorporated | Interference and noise estimation in an OFDM system |
US8489949B2 (en) * | 2003-08-05 | 2013-07-16 | Qualcomm Incorporated | Combining grant, acknowledgement, and rate control commands |
ES2364869T3 (en) * | 2003-08-05 | 2011-09-15 | Qualcomm Incorporated | EXTENDED CHANNEL OF CONFIRMATION OF RECEPTION AND CONTROL OF TRANSMISSION RATE. |
US7630731B2 (en) * | 2003-09-08 | 2009-12-08 | Lundby Stein A | Apparatus, system, and method for managing reverse link communication |
US7724701B2 (en) * | 2003-09-30 | 2010-05-25 | Qualcomm Incorporated | Method and apparatus for controlling reverse link data rate of a mobile station in a communication system with reverse link common rate control |
KR20060079570A (en) * | 2004-12-31 | 2006-07-06 | 삼성전자주식회사 | Apparatus and method for a retransmission of a data in a communication system |
JP2006197173A (en) * | 2005-01-13 | 2006-07-27 | Oki Electric Ind Co Ltd | Radio communication apparatus, radio communication system and radio communication method |
JP4559290B2 (en) * | 2005-04-28 | 2010-10-06 | 株式会社エヌ・ティ・ティ・ドコモ | Transmission rate control method, mobile station and radio base station |
CN103905169A (en) * | 2005-08-24 | 2014-07-02 | 无线星球有限责任公司 | Data unit transmission method |
JP2007174644A (en) * | 2005-12-22 | 2007-07-05 | Intuitive Surgical Inc | Synchronized data communication |
US8904246B2 (en) | 2012-04-27 | 2014-12-02 | International Business Machines Corporation | Variable acknowledge rate to reduce bus contention in presence of communication errors |
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- 1998-08-26 WO PCT/EP1998/005412 patent/WO2000013364A1/en not_active Application Discontinuation
- 1998-08-26 EP EP98945289A patent/EP1025666A1/en not_active Withdrawn
- 1998-08-26 CN CN98810590A patent/CN1277767A/en active Pending
- 1998-08-26 JP JP2000568216A patent/JP2002524918A/en not_active Ceased
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1284549A1 (en) * | 2001-08-16 | 2003-02-19 | TELEFONAKTIEBOLAGET LM ERICSSON (publ) | A robust algorithm for transmission mode selection in Hiperlan/2 |
US7164655B2 (en) | 2001-08-16 | 2007-01-16 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and transceiver for a data packet oriented communication system |
WO2003021903A1 (en) * | 2001-08-28 | 2003-03-13 | Sony Corporation | Transmitter and transmission control method |
US7486634B2 (en) | 2001-08-28 | 2009-02-03 | Sony Corporation | Adaptive modulation based on signal quality |
WO2004006491A1 (en) * | 2002-07-08 | 2004-01-15 | Qualcomm, Incorporated | Improved feedback for data transmissions |
US7676724B2 (en) | 2002-07-08 | 2010-03-09 | Qualcomm Incorporated | Feedback for data transmissions |
US8065581B2 (en) | 2002-07-08 | 2011-11-22 | Qualcomm Incorporated | Feedback for data transmissions |
EP1885078A3 (en) * | 2006-08-02 | 2012-08-01 | Fujitsu Ltd. | Data communication system with delivery acknowledgement |
US8638677B2 (en) | 2006-08-02 | 2014-01-28 | Fujitsu Limited | Data communication system |
Also Published As
Publication number | Publication date |
---|---|
CN1277767A (en) | 2000-12-20 |
AU9265298A (en) | 2000-03-21 |
EP1025666A1 (en) | 2000-08-09 |
US6425105B1 (en) | 2002-07-23 |
JP2002524918A (en) | 2002-08-06 |
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