US20030039226A1 - Physical layer automatic repeat request (ARQ) - Google Patents

Physical layer automatic repeat request (ARQ) Download PDF

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Publication number
US20030039226A1
US20030039226A1 US09/939,410 US93941001A US2003039226A1 US 20030039226 A1 US20030039226 A1 US 20030039226A1 US 93941001 A US93941001 A US 93941001A US 2003039226 A1 US2003039226 A1 US 2003039226A1
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packet
packets
receiver
transmitter
data
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US09/939,410
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Joseph Kwak
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InterDigital Technology Corp
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InterDigital Technology Corp
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Priority to US09/939,410 priority Critical patent/US20030039226A1/en
Assigned to INTERDIGITAL TECHNOLOGY CORPORATION reassignment INTERDIGITAL TECHNOLOGY CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KWAK, JOSEPH A.
Assigned to INTERDIGITAL TECHNOLOGY CORPORATION reassignment INTERDIGITAL TECHNOLOGY CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KWAK, JOSEPH A.
Priority to US10/084,414 priority patent/US7149192B2/en
Priority to US10/084,043 priority patent/US7672265B2/en
Priority to US10/085,187 priority patent/US7519018B2/en
Priority to US10/085,203 priority patent/US20030039220A1/en
Priority to TW091211157U priority patent/TW549775U/zh
Priority to TW091211159U priority patent/TW565082U/zh
Priority to TW091211155U priority patent/TW549774U/zh
Priority to TW091211156U priority patent/TW565081U/zh
Priority to TW091211154U priority patent/TW565080U/zh
Priority to TW091211161U priority patent/TW562343U/zh
Priority to TW091211160U priority patent/TW565075U/zh
Priority to TW091211158U priority patent/TW563968U/zh
Priority to IL16019102A priority patent/IL160191A0/xx
Priority to CA002457223A priority patent/CA2457223C/en
Priority to KR1020047002495A priority patent/KR100654285B1/ko
Priority to KR1020057015529A priority patent/KR20050091104A/ko
Priority to KR1020077017740A priority patent/KR20070095993A/ko
Priority to CNB028164040A priority patent/CN100574173C/zh
Priority to CN200910225820A priority patent/CN101715208A/zh
Priority to EP02759236A priority patent/EP1436701B1/en
Priority to BR0212700-8A priority patent/BR0212700A/pt
Priority to CA002651271A priority patent/CA2651271A1/en
Priority to AU2002324584A priority patent/AU2002324584B2/en
Priority to MXPA04001740A priority patent/MXPA04001740A/es
Priority to JP2003523370A priority patent/JP4540338B2/ja
Priority to PCT/US2002/024404 priority patent/WO2003019376A1/en
Priority to GE5469A priority patent/GEP20063881B/en
Priority to AT02759236T priority patent/ATE526738T1/de
Priority to EP02796397A priority patent/EP1419603B1/en
Priority to CA002457239A priority patent/CA2457239A1/en
Priority to IL16025102A priority patent/IL160251A0/xx
Priority to KR1020057015659A priority patent/KR100811028B1/ko
Priority to EP08014710A priority patent/EP2017995B1/en
Priority to AT02796397T priority patent/ATE503308T1/de
Priority to JP2003524168A priority patent/JP4540341B2/ja
Priority to PCT/US2002/026591 priority patent/WO2003019838A1/en
Priority to AT02761439T priority patent/ATE406001T1/de
Priority to GE5470A priority patent/GEP20063787B/en
Priority to KR1020077018881A priority patent/KR100909259B1/ko
Priority to DE60228467T priority patent/DE60228467D1/de
Priority to KR1020097023343A priority patent/KR20090123023A/ko
Priority to EP02761439A priority patent/EP1436915B1/en
Priority to BR0212698-2A priority patent/BR0212698A/pt
Priority to MXPA04001739A priority patent/MXPA04001739A/es
Priority to CA002457243A priority patent/CA2457243A1/en
Priority to DK02761439T priority patent/DK1436915T3/da
Priority to KR1020087031994A priority patent/KR20090009993A/ko
Priority to KR1020047002493A priority patent/KR100798714B1/ko
Priority to KR1020097012403A priority patent/KR100945404B1/ko
Priority to BR0212699-0A priority patent/BR0212699A/pt
Priority to AU2002326706A priority patent/AU2002326706B2/en
Priority to IL16019202A priority patent/IL160192A0/xx
Priority to CNB028165640A priority patent/CN1300950C/zh
Priority to PCT/US2002/026533 priority patent/WO2003019817A1/en
Priority to CNA2007100840729A priority patent/CN101005337A/zh
Priority to AU2002332602A priority patent/AU2002332602B2/en
Priority to GE5464A priority patent/GEP20063935B/en
Priority to ES02761439T priority patent/ES2312613T3/es
Priority to MXPA04001737A priority patent/MXPA04001737A/es
Priority to KR1020087021005A priority patent/KR100961918B1/ko
Priority to CN02816402.4A priority patent/CN100505599C/zh
Priority to DE60239540T priority patent/DE60239540D1/de
Priority to JP2003524151A priority patent/JP4540340B2/ja
Priority to TW091119056A priority patent/TW556423B/zh
Priority to CNU02247479XU priority patent/CN2669535Y/zh
Priority to TW094127030A priority patent/TWI278192B/zh
Priority to TW092127559A priority patent/TWI269543B/zh
Priority to TW091119055A priority patent/TW556422B/zh
Priority to TW095142162A priority patent/TWI330016B/zh
Priority to TW092128227A priority patent/TWI300297B/zh
Priority to CNU022474749U priority patent/CN2662571Y/zh
Priority to TW091119054A priority patent/TWI261983B/zh
Priority to CNU022474773U priority patent/CN2686216Y/zh
Priority to TW091119058A priority patent/TWI264229B/zh
Priority to CNU022474811U priority patent/CN2686247Y/zh
Priority to TW096146937A priority patent/TW200843399A/zh
Priority to TW098132003A priority patent/TW201029378A/zh
Priority to CNU022474765U priority patent/CN2699605Y/zh
Priority to TW095129280A priority patent/TWI333348B/zh
Priority to TW094129347A priority patent/TWI315136B/zh
Priority to CNU022474757U priority patent/CN2662570Y/zh
Priority to TW096116723A priority patent/TW200814600A/zh
Priority to CNU022474803U priority patent/CN2686246Y/zh
Priority to CNU022474781U priority patent/CN2669494Y/zh
Priority to TW092128225A priority patent/TWI282693B/zh
Priority to TW091119057A priority patent/TWI261984B/zh
Priority to KR1020057015261A priority patent/KR20050098006A/ko
Priority to ARP020103162A priority patent/AR039061A1/es
Priority to KR2020020025152U priority patent/KR200294364Y1/ko
Priority to EP10162978.0A priority patent/EP2214330B1/en
Priority to GEAP20029202A priority patent/GEP20094598B/en
Priority to EP14171291.9A priority patent/EP2793409A1/en
Priority to KR1020077019302A priority patent/KR20070101344A/ko
Priority to JP2003524148A priority patent/JP4540339B2/ja
Priority to KR2020020025157U priority patent/KR200294368Y1/ko
Priority to KR1020057016093A priority patent/KR20050098015A/ko
Priority to CA2457881A priority patent/CA2457881C/en
Priority to ARP020103163A priority patent/AR036284A1/es
Priority to KR2020020025153U priority patent/KR200294539Y1/ko
Priority to AT02761481T priority patent/ATE470279T1/de
Priority to PCT/US2002/026941 priority patent/WO2003019844A2/en
Priority to DE60236604T priority patent/DE60236604D1/de
Priority to ARP020103161A priority patent/AR036283A1/es
Priority to CA2457883A priority patent/CA2457883C/en
Priority to MYPI20023134A priority patent/MY141202A/en
Priority to IL16033102A priority patent/IL160331A0/xx
Priority to BR0212697-4A priority patent/BR0212697A/pt
Priority to EP02761481A priority patent/EP1421743B9/en
Priority to IL16033002A priority patent/IL160330A0/xx
Priority to CA2690114A priority patent/CA2690114A1/en
Priority to GE5472A priority patent/GEP20063847B/en
Priority to CNB028165667A priority patent/CN100450066C/zh
Priority to KR1020077020307A priority patent/KR20070106547A/ko
Priority to JP2003524174A priority patent/JP4540342B2/ja
Priority to KR2020020025155U priority patent/KR200294366Y1/ko
Priority to KR1020047002378A priority patent/KR100798713B1/ko
Priority to KR2020020025150U priority patent/KR200294363Y1/ko
Priority to MYPI20023129A priority patent/MY136488A/en
Priority to PCT/US2002/026940 priority patent/WO2003019812A1/en
Priority to MXPA04001738A priority patent/MXPA04001738A/es
Priority to MYPI20023133A priority patent/MY135542A/en
Priority to MYPI20023132A priority patent/MY138627A/en
Priority to ARP020103164A priority patent/AR036285A1/es
Priority to KR2020020025151U priority patent/KR200294538Y1/ko
Priority to ARP020103160A priority patent/AR038784A1/es
Priority to KR2020020025154U priority patent/KR200294365Y1/ko
Priority to EP02753522A priority patent/EP1421709B1/en
Priority to CNB028164067A priority patent/CN100337410C/zh
Priority to AT02753522T priority patent/ATE557481T1/de
Priority to BR0212701-6A priority patent/BR0212701A/pt
Priority to GE5471A priority patent/GEP20063981B/en
Priority to KR2020020025156U priority patent/KR200294367Y1/ko
Priority to KR1020047002469A priority patent/KR100798715B1/ko
Priority to MXPA04001736A priority patent/MXPA04001736A/es
Priority to MYPI20023131A priority patent/MY137091A/en
Priority to AU2002326744A priority patent/AU2002326744B2/en
Publication of US20030039226A1 publication Critical patent/US20030039226A1/en
Priority to KR1020030073357A priority patent/KR100564702B1/ko
Priority to KR1020030073356A priority patent/KR100564705B1/ko
Priority to KR1020030073335A priority patent/KR100564703B1/ko
Priority to KR10-2003-0073349A priority patent/KR20030089662A/ko
Priority to KR1020030073336A priority patent/KR100564707B1/ko
Priority to KR1020030073354A priority patent/KR100564704B1/ko
Priority to KR1020030073337A priority patent/KR100564701B1/ko
Priority to KR1020030075050A priority patent/KR100653227B1/ko
Priority to IL160192A priority patent/IL160192A/en
Priority to IL160191A priority patent/IL160191A/en
Priority to IL160251A priority patent/IL160251A/en
Priority to IL160331A priority patent/IL160331A/en
Priority to IL160330A priority patent/IL160330A/en
Priority to NO20040786A priority patent/NO20040786L/no
Priority to NO20040783A priority patent/NO20040783L/no
Priority to NO20040785A priority patent/NO20040785L/no
Priority to NO20040784A priority patent/NO20040784L/no
Priority to NO20040787A priority patent/NO20040787L/no
Priority to HK04110342A priority patent/HK1067468A1/xx
Priority to HK05100426.9A priority patent/HK1068473A1/xx
Priority to HK05100427.8A priority patent/HK1068426A1/xx
Priority to HK05102754A priority patent/HK1070198A1/xx
Priority to HK05102753.8A priority patent/HK1070210A1/xx
Priority to KR1020050075501A priority patent/KR20050096862A/ko
Priority to KR1020050075498A priority patent/KR20050097884A/ko
Priority to KR1020050075502A priority patent/KR20050098775A/ko
Priority to KR1020050075500A priority patent/KR20050096861A/ko
Priority to KR1020050076207A priority patent/KR100849910B1/ko
Priority to KR1020050076154A priority patent/KR20050097887A/ko
Priority to KR1020050076143A priority patent/KR20050097886A/ko
Priority to JP2005253257A priority patent/JP4523897B2/ja
Priority to KR1020050102867A priority patent/KR20050118250A/ko
Priority to KR1020070080447A priority patent/KR20070096988A/ko
Priority to KR1020070084520A priority patent/KR20070100672A/ko
Priority to KR1020070085059A priority patent/KR20070094877A/ko
Priority to KR1020070084978A priority patent/KR20070093035A/ko
Priority to KR1020070084986A priority patent/KR20070093036A/ko
Priority to KR1020070093512A priority patent/KR20070110214A/ko
Priority to KR1020070096628A priority patent/KR20070112741A/ko
Priority to ARP080102895A priority patent/AR067421A2/es
Priority to IL200079A priority patent/IL200079A/en
Priority to US12/683,711 priority patent/US8102801B2/en
Priority to IL207563A priority patent/IL207563A0/en
Priority to US13/356,206 priority patent/US20120120928A1/en
Priority to US15/614,010 priority patent/US20170272205A1/en
Abandoned legal-status Critical Current

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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
    • H04L1/12—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]
    • 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
    • H04L1/0033—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the transmitter
    • H04L1/0034—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the transmitter where the transmitter decides based on inferences, e.g. use of implicit signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2612—Arrangements for wireless medium access control, e.g. by allocating physical layer transmission capacity
    • 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
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • 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
    • H04L1/1829—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
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1822—Automatic repetition systems, e.g. Van Duuren systems involving configuration of automatic repeat request [ARQ] with parallel processes
    • 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
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0096—Channel splitting in point-to-point links
    • 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
    • H04W88/08—Access point devices

Definitions

  • the present invention relates to wireless communication systems. More particularly, it relates to a modification to such systems by employing a physical layer (PHY) automatic repeat request (ARQ) scheme.
  • PHY physical layer
  • ARQ automatic repeat request
  • BFWA Proposed broadband fixed wireless access
  • SC-FDE single carrier-frequency domain equalization
  • OFDM orthogonal frequency division multiplex
  • HSDPA high speed downlink packet access
  • the current proposed system employs a layer 2 automatic repeat request (ARQ) system.
  • Data blocks unsuccessfully transmitted to the subscribers are buffered and retransmitted from layer 2 .
  • the data blocks stored in layer 2 are typically large, are transmitted for high signal to noise ratio (SNR) reception, are received with a low block error rate (BLER), and are infrequently retransmitted.
  • SNR signal to noise ratio
  • BLER block error rate
  • layer 2 ARQ signaling is typically slow requiring large buffers and long retransmission intervals.
  • a physical automatic request repeat system comprises a transmitter and a receiver.
  • a physical layer transmitter at the transmitter, receives data and formats the received data into packets having a particular encoding/data modulation.
  • the physical layer transmitter contains n channels which transmit the packets and retransmits packets in response to not receiving a corresponding acknowledgment for a given packet.
  • An adaptive modulation and coding controller in the transmitter collects retransmission statistics and adjusts the particular encoding/data modulations using the collected statistics.
  • the receiver has a physical layer n-channel receiver for receiving the packets.
  • the receiver contains an n-channel hybrid ARQ combiner/decoder which combines packet transmissions, decodes packets and detects packet errors.
  • the receiver contains an acknowledgment transmitter which transmits an acknowledgment for each packet, if that packet has an acceptable error rate.
  • the receiver contains an in-sequence delivery element which delivers acceptable packets to higher layers.
  • FIGS. 1 a and 1 b are simplified block diagrams of downlink and uplink physical ARQs.
  • FIG. 2 is a flow chart for using retransmission statistics for adaptive modulation and coding.
  • FIG. 3 is block diagram showing a multi-channel stop and wait architecture.
  • FIGS. 1 a and 1 b respectively show a downlink physical ARQ 10 and uplink physical ARQ 20 .
  • the downlink physical ARQ 10 comprises a base station 12 receiving packets from the higher layer ARQ transmitter 14 a provided in network 14 .
  • the packets from transmitter 14 a are applied to the physical layer ARQ transmitter 12 a in base station 12 .
  • the ARQ transmitter 12 a encodes the data with a forward error correcting code (FEC), appends error check sequences (ECSs), modulates the data as directed by the adaptive modulation and coding (AMC) controller 12 c, such as by using binary phase shift keying (BPSK), quadrature phase shift keying (QPSK) or m-ary quadrature amplitude modulation (i.e. 16-QAM or 64-QAM).
  • FEC forward error correcting code
  • ECSs error check sequences
  • AMC adaptive modulation and coding
  • BPSK binary phase shift keying
  • QPSK quadrature phase shift keying
  • m-ary quadrature amplitude modulation i.e. 16-QAM or 64-QAM.
  • the AMC controller 12 a may vary the subchannels used to carry the packet data.
  • the physical layer ARQ transmitter 12 a transmits packets to the subscriber unit 16 through air interface 14 by way of switch, circulator or duplexor 12 d and antenna 13 .
  • the transmitter 12 a also temporarily stores the message for retransmission, if necessary, in a buffer memory incorporated in the transmitter 12 a.
  • Antenna 15 of subscriber unit 16 receives the packet.
  • the packet is input into physical layer ARQ receiver 16 a through switch, circulator or duplexor 16 b.
  • the packet is FEC decoded and checked for errors using the ECS.
  • the receiver 16 a controls acknowledgment transmitter 16 c to either acknowledge (ACK) receipt of a packet with an acceptable error rate or to request retransmission by, preferably, withholding an acknowledgment signal or transmitting a negative acknowledgment (NAK).
  • ACK acknowledge
  • NAK negative acknowledgment
  • the ACK is sent by ACK transmitter 16 c to the base station 12 through switch 16 b and antenna 15 .
  • the ACK is sent via the air interface 14 to antenna 13 of base station 12 .
  • the received ACK is processed by an acknowledgment receiver 12 b in the base station.
  • the ACK receiver 12 b delivers the ACK/NAKs to the adaptive modulation and coding (AMC) controller 12 c and to the transmitter 12 a.
  • the AMC controller 12 c analyzes the channel quality to the subscriber unit 16 using statistics of the received ACKs and may vary the FEC encoding and modulation techniques of subsequent transmissions of the message, as will be described in more detail. If the subscriber unit 16 acknowledges receipt of the packet, receipt of this ACK at base station 12 causes the original packet, which was temporarily stored in a buffer memory, to be cleared in readiness for the next packet.
  • the physical layer transmitter 12 a retransmits the original message or selectively modified version of the original message to subscriber 16 .
  • the retransmission is combined with the original transmission, if available.
  • This technique facilitates receipt of a correct message by use of data redundancy or selective repeat combining.
  • the packets having an acceptable error rate are transferred to higher layers 16 d for further processing.
  • the acceptable received packets are delivered to the higher layers 16 d in the same data order in which the data was provided to transmitter 12 a in the base station (i.e. in-sequence delivery).
  • the maximum number of retransmissions is limited to an operator-defined integer value, such as in the range of 1 to 8. After the maximum number of retransmissions are attempted, the buffer memory is cleared for use by the next packet. Decoding an acknowledgment using small packets at the physical layer reduces transmission delays and message handling time.
  • the AMC controller 12 c may vary the modulation and coding schemes for that channel, as shown in FIG. 2. Additionally, the retransmission statistics can also be combined with other link quality measurements, such as bit error rates (BERs) and block error rates (BLERs), by the AMC controller 12 c to gauge the channel quality and determine whether a change in the modulation and coding scheme is required.
  • BERs bit error rates
  • BLERs block error rates
  • the retransmission occurrences for a particular channel are measured to produce retransmission statistics, ( 60 ).
  • a decision on whether to change the modulation scheme is made using the retransmission statistics, ( 62 ). If the retransmissions are excessive, a more robust coding and modulation scheme is used, ( 64 ), usually at a reduced data transfer rate.
  • the AMC controller 12 c may increase the spreading factor and use more codes to transfer the packet data. Alternately or additionally, the AMC controller may switch from a high data throughput modulation scheme to a lower one, such as from 64-QAM to 16-QAM or QPSK.
  • a switch to a higher capacity modulation scheme is made, such as from QPSK to 16-ary QAM or 64-ary QAM, ( 66 ).
  • the decision preferably uses both the retransmission rate and other link quality measurements signaled from the receiver, such as BER or BLER, ( 62 ).
  • the decision limits are preferably set by the system operator.
  • the retransmission occurrences are used to monitor the channel quality of each subchannel. If the retransmission rate or retransmission rate/link quality for a particular subchannel indicates poor quality, that subchannel may be selectively nulled from the OFDM frequency set, ( 64 ), in order to preclude use of such poor quality subchannels for some future period. If the retransmission rate or retransmission rate/link quality indicates high quality, a previously nulled subchannels may be added back to the OFDM frequency set, ( 66 ).
  • Using the retransmission occurrences as a basis for AMC provides a flexibility to match the modulation and coding scheme to the average channel conditions for each user. Additionally, the retransmission rate is insensitive to measurement error and reporting delay from the subscriber unit 16 .
  • the uplink ARQ 20 is similar in nature to the downlink ARQ 10 and is comprised of a subscriber unit 26 in which packets from a higher layer ARQ transmitter 28 a of the higher layers 28 are transferred to physical layer ARQ transmitter 26 a .
  • the message is transmitted to the base station antenna through switch 26 d , subscriber antenna 25 and air interface 24 .
  • the AMC controller likewise, may vary the modulation and coding scheme using the retransmission statistics of a channel.
  • Physical layer ARQ receiver 22 a determines if the message has an acceptable error rate requiring retransmission.
  • the acknowledgment transmitter reports status to subscriber unit 26 , causing the transmitter 26 a to retransmit or alternatively to clear the original message temporarily stored at transmitter 26 a in readiness to receive the next message from the higher layers 28 .
  • Successfully received packets are sent to the network 24 for further processing.
  • the system is preferably used for a HSDPA application in a BFWA system, although other implementations may be used.
  • the BFWA system may use frequency division duplex or time division duplex SC-FDE or OFDMA.
  • the base station and all of the subscribers are in fixed locations.
  • the system may comprise a base station and a large number of subscriber units. Each subscriber unit may serve multiple users within one building or several neighboring buildings, for example. These applications typically require a large bandwidth due to the large number of end users at one subscriber unit site.
  • a PHY ARQ deployed in such a system is transparent to the higher layers, such as the medium access controllers (MACs).
  • MACs medium access controllers
  • PHY ARQ can be used in conjunction with higher layer ARQs, such as layer 2 .
  • the PHY ARQ reduces the retransmission overhead of the higher layer ARQs.
  • FIG. 3 is an illustration of an N-channel stop and wait architecture for a PHYARQ 30 .
  • the Physical Layer ARQ transmit function 38 may be located at the base station, subscriber unit or both depending on whether downlink, uplink or both PHY ARQs are used.
  • Blocks 34 a of data arrive from the network.
  • the network blocks are placed in a queue 34 for transmission over the data channel 41 of the air interface 43 .
  • An N-channel sequencer 36 sends data of the blocks sequentially to the N transmitters 40 - 1 to 40 -n. Each transmitter 40 - 1 to 40 -n is associated with a transmit sequence in the data channel 41 .
  • Each transmitter 40 - 1 to 40 -n FEC encodes and provides ECS for the block data to produce packets for AMC modulation and transmission in the data channel 41 .
  • the FEC encoded/ECS data is stored in a buffer of the transmitter 40 - 1 to 40 -n for possible retransmission. Additionally, control information is sent from the PHYARQ transmitter 38 to synchronize reception, demodulation and decoding at the receivers 46 - 1 to 46 -n.
  • Each of the N receivers 46 - 1 to 46 -n receives the packet in its associated timeslot.
  • the received packet is sent to a respective hybrid ARQ decoder 50 - 1 to 50 -n ( 50 ).
  • the hybrid ARQ decoder 50 determines the error rate, such as BER or BLER, for the received packet. If the packet has an acceptable error rate, it is released to the higher levels for further processing and an ACK is sent by the ACK transmitter 54 . If the error rate is unacceptable or no packet was received, no ACK is sent or a NAK is sent. Packets with unacceptable error rates are buffered at the decoder 50 for potential combining with a retransmitted packet.
  • One approach for combining packets using turbo codes is as follows. If a turbo encoded packet is received with an unacceptable error rate, the packet data is retransmitted to facilitate code combining. The packet containing the same data is encoded differently. To decode the packet data, both packets are processed by the turbo decoder to recover the original data. Since the second packet has a different encoding, its soft symbols are mapped to different points in the decoding scheme. Using two packets with different encoding adds coding diversity and transmission diversity to improve the overall BER. In another approach, the identical signal is transmitted. The two received packets are combined using a maximum ratio combining of symbols. The combined signal is subsequently decoded.
  • the ACK for each receiver 46 - 1 to 46 -n is sent in a fast feedback channel (FFC) 45 .
  • the fast feedback channel 45 is preferably a low latency channel.
  • the ACKs may be sent in idle periods between upstream and downstream transmissions.
  • the FFC 45 is preferably a low speed, high bandwidth CDMA channel overlaying other in-band transmissions.
  • the FFC CDMA codes and modulations are selected to minimize interference to other in-band transmissions. To increase the capacity of such a FFC 45 , multiple codes may be used.
  • the ACK receiver 56 detects the ACKs and indicates to the corresponding transmitter 40 - 1 to 40 -n whether the ACK was received. If the ACK was not received, the packet is retransmitted. The retransmitted packet may have a different modulation and coding scheme as directed by the AMC controller 12 c, 26 c . If the ACK is received, the transmitter 40 - 1 to 40 -n clears the previous packet from the buffer and accepts a subsequent packet for transmission.
  • the number of transmitters and receivers N is based on various design considerations, such as the channel capacity and ACK response time.
  • a 2-channel architecture is preferably utilized, with even and odd transmitters and receivers.
  • the PHY ARQ technique of the preferred embodiment provides a 7 db gain in signal to noise ratio (SNR) as compared to a system using only higher layer ARQ. This occurs by operating at higher block error rates (BLERs) (5-20% BLER) and using smaller block sizes for layer 1 than is practical with higher layer ARQ alone.
  • SNR signal to noise ratio
  • the decreased SNR requirement allows for: increased capacity by switching to high order modulation employing an adaptive modulation and coding (AMC) technique; lower customer premise equipment (CPE) costs by using lower grade RF (radio frequency) components with the PHY ARQ compensating for reduced implementation performance; increased downlink range which extends the cell radius; reduced downlink power in the base station (BS) to minimize cell-cell interference; and increased power amplifier (PA) back-off when employing a multi-carrier technique.
  • AMC adaptive modulation and coding
  • CPE customer premise equipment
  • RF radio frequency

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Communication Control (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Small-Scale Networks (AREA)
  • Radio Relay Systems (AREA)
US09/939,410 2001-08-24 2001-08-24 Physical layer automatic repeat request (ARQ) Abandoned US20030039226A1 (en)

Priority Applications (182)

Application Number Priority Date Filing Date Title
US09/939,410 US20030039226A1 (en) 2001-08-24 2001-08-24 Physical layer automatic repeat request (ARQ)
US10/084,414 US7149192B2 (en) 2001-08-24 2002-02-27 Base station implementing a physical layer automatic repeat request
US10/084,043 US7672265B2 (en) 2001-08-24 2002-02-27 Method for physical layer automatic repeat request for a base station
US10/085,187 US7519018B2 (en) 2001-08-24 2002-02-27 Method for physical layer automatic repeat request for a subscriber unit
US10/085,203 US20030039220A1 (en) 2001-08-24 2002-02-27 Implementing a physical layer automatic repeat request for a subscriber unit
TW091211157U TW549775U (en) 2001-08-24 2002-07-22 Broadband fixed wireless access (BFWA) base station having a physical layer automatic repeat request mechanism
TW091211159U TW565082U (en) 2001-08-24 2002-07-22 Single carrier-frequency domain equalization (SC-FDE) base station having a physical layer automatic repeat request mechanism
TW091211155U TW549774U (en) 2001-08-24 2002-07-22 High speed downlink packet access (HSDPA) base station using a physical layer automatic repeat request mechanism
TW091211156U TW565081U (en) 2001-08-24 2002-07-22 Broadband fixed wireless access (BFWA) user equipment using a physical layer automatic repeat request mechanism
TW091211154U TW565080U (en) 2001-08-24 2002-07-22 High speed downlink packet access (HSDPA) user equipment using a physical layer automatic repeat request mechanism
TW091211161U TW562343U (en) 2001-08-24 2002-07-22 Orthogonal frequency division multiple access (OFDMA) base station having a physical layer automatic repeat request mechanism
TW091211160U TW565075U (en) 2001-08-24 2002-07-22 Orthogonal frequency division multiple access (OFDMA) user equipment having a physical layer automatic repeat request mechanism
TW091211158U TW563968U (en) 2001-08-24 2002-07-22 Single carrier-frequency domain equalization (SC-FDE) user equipment having a physical layer automatic repeat request mechanism
IL16019102A IL160191A0 (en) 2001-08-24 2002-08-01 Base station implementing a physical layer automatic repeat request
CA002457223A CA2457223C (en) 2001-08-24 2002-08-01 Base station implementing a physical layer automatic repeat request
KR1020047002495A KR100654285B1 (ko) 2001-08-24 2002-08-01 물리 계층의 자동 재전송 요구를 구현하는 기지국
KR1020057015529A KR20050091104A (ko) 2001-08-24 2002-08-01 물리 계층의 자동 재전송 요구를 구현하는 기지국
KR1020077017740A KR20070095993A (ko) 2001-08-24 2002-08-01 물리 계층의 자동 재전송 요구를 구현하는 기지국
CNB028164040A CN100574173C (zh) 2001-08-24 2002-08-01 实施物理层自动重复要求的基站
CN200910225820A CN101715208A (zh) 2001-08-24 2002-08-01 实施物理层自动重复要求的基站
EP02759236A EP1436701B1 (en) 2001-08-24 2002-08-01 Base station implementing a physical layer automatic repeat request
BR0212700-8A BR0212700A (pt) 2001-08-24 2002-08-01 Estação base que implementa solicitação de repetição automática de camada fìsica
CA002651271A CA2651271A1 (en) 2001-08-24 2002-08-01 Base station implementing a physical layer automatic repeat request
AU2002324584A AU2002324584B2 (en) 2001-08-24 2002-08-01 Base station implementing a physical layer automatic repeat request
MXPA04001740A MXPA04001740A (es) 2001-08-24 2002-08-01 Estacion base que implementa una demanda repetida automatica de capa fisica.
JP2003523370A JP4540338B2 (ja) 2001-08-24 2002-08-01 物理層自動リピート要求を実装する基地局
PCT/US2002/024404 WO2003019376A1 (en) 2001-08-24 2002-08-01 Base station implementing a physical layer automatic repeat request
GE5469A GEP20063881B (en) 2001-08-24 2002-08-01 Base station implementing a physical layer automatic repeat request
AT02759236T ATE526738T1 (de) 2001-08-24 2002-08-01 Basisstation, die eine automatische wiederholungsanforderung der physischen schicht implementiert
EP02796397A EP1419603B1 (en) 2001-08-24 2002-08-21 Method for physical layer automatic repeat request for a base station
CA002457239A CA2457239A1 (en) 2001-08-24 2002-08-21 Physical layer automatic repeat request (arq)
IL16025102A IL160251A0 (en) 2001-08-24 2002-08-21 Method for physical layer automatic repeat request for a base station
KR1020057015659A KR100811028B1 (ko) 2001-08-24 2002-08-21 기지국에서의 물리 계층 자동 반복 요청 방법
EP08014710A EP2017995B1 (en) 2001-08-24 2002-08-21 Physical layer automatic repeat request (ARQ)
AT02796397T ATE503308T1 (de) 2001-08-24 2002-08-21 Verfahren fur automatische wiederholungsanforderungen der physikalischen schicht für eine basisstation
JP2003524168A JP4540341B2 (ja) 2001-08-24 2002-08-21 基地局の物理層自動リピート要求の方法
PCT/US2002/026591 WO2003019838A1 (en) 2001-08-24 2002-08-21 Method for physical layer automatic repeat request for a base station
AT02761439T ATE406001T1 (de) 2001-08-24 2002-08-21 Automatische wiederholungsanforderung der physikalischen schicht
GE5470A GEP20063787B (en) 2001-08-24 2002-08-21 Method for physical layer automatic repeat request for a base station
KR1020077018881A KR100909259B1 (ko) 2001-08-24 2002-08-21 기지국에서의 물리 계층 자동 반복 요청 방법
DE60228467T DE60228467D1 (de) 2001-08-24 2002-08-21 Automatische wiederholungsanforderung der physikalischen schicht
KR1020097023343A KR20090123023A (ko) 2001-08-24 2002-08-21 기지국에서의 물리 계층 자동 반복 요청 방법
EP02761439A EP1436915B1 (en) 2001-08-24 2002-08-21 Physical layer automatic repeat request
BR0212698-2A BR0212698A (pt) 2001-08-24 2002-08-21 Método de solicitação de repetição automática de camada fìsica para estação base
MXPA04001739A MXPA04001739A (es) 2001-08-24 2002-08-21 Metodo para la demanda repetida automatica de capa fisica para una estacion base.
CA002457243A CA2457243A1 (en) 2001-08-24 2002-08-21 Method for physical layer automatic repeat request for a base station
DK02761439T DK1436915T3 (da) 2001-08-24 2002-08-21 Automatisk gentagelsesanmodning i fysisk lag
KR1020087031994A KR20090009993A (ko) 2001-08-24 2002-08-21 기지국에서의 물리 계층 자동 반복 요청 방법
KR1020047002493A KR100798714B1 (ko) 2001-08-24 2002-08-21 기지국에서의 물리 계층 자동 반복 요청 방법
KR1020097012403A KR100945404B1 (ko) 2001-08-24 2002-08-21 기지국에서의 물리 계층 자동 반복 요청 방법
BR0212699-0A BR0212699A (pt) 2001-08-24 2002-08-21 Solicitação de repetição automática de camada fìsica (arq)
AU2002326706A AU2002326706B2 (en) 2001-08-24 2002-08-21 Physical layer automatic repeat request (ARQ)
IL16019202A IL160192A0 (en) 2001-08-24 2002-08-21 Physical layer automatic repeat request
CNB028165640A CN1300950C (zh) 2001-08-24 2002-08-21 物理层自动请求重发系统及其方法
PCT/US2002/026533 WO2003019817A1 (en) 2001-08-24 2002-08-21 Physical layer automatic repeat request (arq)
CNA2007100840729A CN101005337A (zh) 2001-08-24 2002-08-21 物理层自动请求重发系统及其方法
AU2002332602A AU2002332602B2 (en) 2001-08-24 2002-08-21 Method for physical layer automatic repeat request for a base station
GE5464A GEP20063935B (en) 2001-08-24 2002-08-21 Physical layer automatic repeat request (arq)
ES02761439T ES2312613T3 (es) 2001-08-24 2002-08-21 Solicitud de repeticion automatica de capa fisica.
MXPA04001737A MXPA04001737A (es) 2001-08-24 2002-08-21 Demanda repetida automaticamente de capa fisica (arq).
KR1020087021005A KR100961918B1 (ko) 2001-08-24 2002-08-21 기지국에서의 물리 계층 자동 반복 요청 방법
CN02816402.4A CN100505599C (zh) 2001-08-24 2002-08-21 基站物理层自动重传请求的方法
DE60239540T DE60239540D1 (de) 2001-08-24 2002-08-21 Verfahren fur automatische wiederholungsanforderungen der physikalischen schicht für eine basisstation
JP2003524151A JP4540340B2 (ja) 2001-08-24 2002-08-21 物理層自動リピート要求（ａｒｑ）
TW091119056A TW556423B (en) 2001-08-24 2002-08-22 Method for physical layer automatic repeat request for a base station
CNU02247479XU CN2669535Y (zh) 2001-08-24 2002-08-22 具有物理层自动重发请求机制的宽带固定无线接入（bfwa）基站
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TW092127559A TWI269543B (en) 2001-08-24 2002-08-22 Method for physical layer automatic repeat request for a subscriber unit
TW091119055A TW556422B (en) 2001-08-24 2002-08-22 Base station implementing a physical layer automatic repeat request
TW095142162A TWI330016B (en) 2001-08-24 2002-08-22 Method for physical layer automatic repeat request for a subscriber unit
TW092128227A TWI300297B (en) 2001-08-24 2002-08-22 Implementing a physical layer automatic repeat request for a base station
CNU022474749U CN2662571Y (zh) 2001-08-24 2002-08-22 具有物理层自动重发请求机制的单载波频域均衡（sc－fde）用户设备
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CNU022474773U CN2686216Y (zh) 2001-08-24 2002-08-22 有物理层自动重发请求机制的宽带固定无线接入（bfwa）用户设备
TW091119058A TWI264229B (en) 2001-08-24 2002-08-22 Method for physical layer automatic repeat request for a subscriber unit
CNU022474811U CN2686247Y (zh) 2001-08-24 2002-08-22 具有物理层自动重发请求机制的单载波频域均衡（sc－fde）基站
TW096146937A TW200843399A (en) 2001-08-24 2002-08-22 Implementing a physical layer automatic repeat request for a subscriber unit
TW098132003A TW201029378A (en) 2001-08-24 2002-08-22 Implementing a physical layer automatic repeat request for a subscriber unit
CNU022474765U CN2699605Y (zh) 2001-08-24 2002-08-22 具有物理层自动重发请求机制的高速下行包访问（hsdpa）用户设备
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TW094129347A TWI315136B (en) 2001-08-24 2002-08-22 Implementing a physical layer automatic repeat request for a subscriber unit
CNU022474757U CN2662570Y (zh) 2001-08-24 2002-08-22 具有物理层自动重发请求机制的高速下行包访问（hsdpa）基站
TW096116723A TW200814600A (en) 2001-08-24 2002-08-22 Physical layer automatic repeat request (ARQ)
CNU022474803U CN2686246Y (zh) 2001-08-24 2002-08-22 具有物理层自动重发请求机制的正交频分多址（ofdma）基站
CNU022474781U CN2669494Y (zh) 2001-08-24 2002-08-22 具有物理层自动重发请求机制的正交频分多址（ofdma）用户设备
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TW091119057A TWI261984B (en) 2001-08-24 2002-08-22 Implementing a physical layer automatic repeat request for a subscriber unit
KR1020057015261A KR20050098006A (ko) 2001-08-24 2002-08-23 물리 계층의 자동 재전송 요구를 구현하는 가입자 유니트
ARP020103162A AR039061A1 (es) 2001-08-24 2002-08-23 Un metodo para ajustar la modulacion en una estacion base
KR2020020025152U KR200294364Y1 (ko) 2001-08-24 2002-08-23 물리 계층 자동 반복 요청 메커니즘을 이용한 광대역고정 무선액세스 사용자 장치
EP10162978.0A EP2214330B1 (en) 2001-08-24 2002-08-23 Implementing a physical layer automatic repeat request for a subscriber unit
GEAP20029202A GEP20094598B (en) 2001-08-24 2002-08-23 Implementing a physical layer automatic repeat request for a subscriber unit
EP14171291.9A EP2793409A1 (en) 2001-08-24 2002-08-23 Implementing a physical layer automatic repeat request for a subscriber unit
KR1020077019302A KR20070101344A (ko) 2001-08-24 2002-08-23 가입자 유닛을 위한 물리 계층 자동 재전송 요구 방법
JP2003524148A JP4540339B2 (ja) 2001-08-24 2002-08-23 加入者ユニットの物理層自動リピート要求の方法
KR2020020025157U KR200294368Y1 (ko) 2001-08-24 2002-08-23 물리 계층 자동 반복 요청 메커니즘을 갖는 직교 주파수분할 다중 액세스 기지국
KR1020057016093A KR20050098015A (ko) 2001-08-24 2002-08-23 가입자 유닛을 위한 물리 계층 자동 재전송 요구 방법
CA2457881A CA2457881C (en) 2001-08-24 2002-08-23 Method for physical layer automatic repeat request for a subscriber unit
ARP020103163A AR036284A1 (es) 2001-08-24 2002-08-23 Un aparato de pedido de repeticion automatica, de capa fisica, y una unidad de abonado que utiliza dicho aparato
KR2020020025153U KR200294539Y1 (ko) 2001-08-24 2002-08-23 물리 계층 자동 반복 요청 메커니즘을 갖는 광대역 고정무선 액세스 기지국
AT02761481T ATE470279T1 (de) 2001-08-24 2002-08-23 Ausführung einer automatischen wiederholungsaufforderung in der physikalischen lage für eine teilnehmereinheit
PCT/US2002/026941 WO2003019844A2 (en) 2001-08-24 2002-08-23 Implementing a physical layer automatic repeat request for a subscriber unit
DE60236604T DE60236604D1 (de) 2001-08-24 2002-08-23 Ausführung einer automatischen wiederholungsaufforderung in der physikalischen lage für eine teilnehmereinheit
ARP020103161A AR036283A1 (es) 2001-08-24 2002-08-23 Un aparato de pedido de repeticion automatica, de capa fisica, y estaciones base que lo utilizan
CA2457883A CA2457883C (en) 2001-08-24 2002-08-23 Implementing a physical layer automatic repeat request for a subscriber unit
MYPI20023134A MY141202A (en) 2001-08-24 2002-08-23 Method for physical layer automatic repeat request for a subscriber unit
IL16033102A IL160331A0 (en) 2001-08-24 2002-08-23 Method for physical layer automatic repeat request for a subscriber unit
BR0212697-4A BR0212697A (pt) 2001-08-24 2002-08-23 Método de solicitação de repetição automática de camada fìsica para unidade de assinante
EP02761481A EP1421743B9 (en) 2001-08-24 2002-08-23 Implementing a physical layer automatic repeat request for a subscriber unit
IL16033002A IL160330A0 (en) 2001-08-24 2002-08-23 Implementing a physical layer automatic repeat request for a subscriber unit
CA2690114A CA2690114A1 (en) 2001-08-24 2002-08-23 Implementing a physical layer automatic repeat request for a subscriber unit
GE5472A GEP20063847B (en) 2001-08-24 2002-08-23 Method for Physical Layer Automatic Repeat Request for a Subscriber Unit
CNB028165667A CN100450066C (zh) 2001-08-24 2002-08-23 用户单元中实施物理层自动重复要求
KR1020077020307A KR20070106547A (ko) 2001-08-24 2002-08-23 물리 계층의 자동 재전송 요구를 구현하는 가입자 유니트
JP2003524174A JP4540342B2 (ja) 2001-08-24 2002-08-23 加入者ユニットの物理層自動リピート要求の実装
KR2020020025155U KR200294366Y1 (ko) 2001-08-24 2002-08-23 물리 계층 자동 반복 요청 메커니즘을 갖는 단일반송파-주파수 영역 등화 기지국
KR1020047002378A KR100798713B1 (ko) 2001-08-24 2002-08-23 가입자 유닛을 위한 물리 계층 자동 재전송 요구 방법
KR2020020025150U KR200294363Y1 (ko) 2001-08-24 2002-08-23 물리 계층 자동 반복 요청 메커니즘을 이용한 고속다운링크 패킷 액세스 사용자 장치
MYPI20023129A MY136488A (en) 2001-08-24 2002-08-23 Physical layer automatic repeat request (arq)
PCT/US2002/026940 WO2003019812A1 (en) 2001-08-24 2002-08-23 Method for physical layer automatic repeat request for a subscriber unit
MXPA04001738A MXPA04001738A (es) 2001-08-24 2002-08-23 Implementacion de una demanda repetida automatica de capa fisica para una uinidad de subscriptora.
MYPI20023133A MY135542A (en) 2001-08-24 2002-08-23 Base station implementing a physical layer automatic repeat request
MYPI20023132A MY138627A (en) 2001-08-24 2002-08-23 method for physical layer automatic repeat request for a base station
ARP020103164A AR036285A1 (es) 2001-08-24 2002-08-23 Un metodo para ajustar la modulacion de datos en una unidad de abonado
KR2020020025151U KR200294538Y1 (ko) 2001-08-24 2002-08-23 물리 계층 자동 반복 요청 메커니즘을 이용한 고속다운링크 패킷 액세스 기지국
ARP020103160A AR038784A1 (es) 2001-08-24 2002-08-23 Un metodo para ajustar la modulacion de datos en un sistema de comunicaciones inalambrico; un sistema de pedido de repeticion automatica de capa fisica y un sistema de comunicaciones que emplea un acceso inalambrico fijo de banda ancha.
KR2020020025154U KR200294365Y1 (ko) 2001-08-24 2002-08-23 물리 계층 자동 반복 요청 메커니즘을 갖는 단일반송파-주파수영역 등화 사용자 장치
EP02753522A EP1421709B1 (en) 2001-08-24 2002-08-23 Method for physical layer automatic repeat request for a subscriber unit
CNB028164067A CN100337410C (zh) 2001-08-24 2002-08-23 用户单元中物理层自动重复要求方法
AT02753522T ATE557481T1 (de) 2001-08-24 2002-08-23 Verfahren zur automatischen wiederholungsaufforderung auf physikalischer schicht für eine teilnehmereinheit
BR0212701-6A BR0212701A (pt) 2001-08-24 2002-08-23 Implementação de solicitação de repetição automática de camada fìsica para unidade de assinante
GE5471A GEP20063981B (en) 2001-08-24 2002-08-23 Implementing a physical layer automatic repeat request for a subscriber unit
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US12/683,711 US8102801B2 (en) 2001-08-24 2010-01-07 User equipment for physical layer automatic repeat request
IL207563A IL207563A0 (en) 2001-08-24 2010-08-12 Physical layer automatic repeat request
US13/356,206 US20120120928A1 (en) 2001-08-24 2012-01-23 User equipment for physical layer automatic repeat request
US15/614,010 US20170272205A1 (en) 2001-08-24 2017-06-05 User equipment for physical layer automatic repeat request

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US10/085,203 Continuation US20030039220A1 (en) 2001-08-24 2002-02-27 Implementing a physical layer automatic repeat request for a subscriber unit
US10/084,043 Continuation US7672265B2 (en) 2001-08-24 2002-02-27 Method for physical layer automatic repeat request for a base station
US10/085,187 Continuation US7519018B2 (en) 2001-08-24 2002-02-27 Method for physical layer automatic repeat request for a subscriber unit

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US10/085,187 Expired - Fee Related US7519018B2 (en) 2001-08-24 2002-02-27 Method for physical layer automatic repeat request for a subscriber unit
US10/084,043 Expired - Fee Related US7672265B2 (en) 2001-08-24 2002-02-27 Method for physical layer automatic repeat request for a base station
US10/084,414 Expired - Lifetime US7149192B2 (en) 2001-08-24 2002-02-27 Base station implementing a physical layer automatic repeat request
US10/085,203 Abandoned US20030039220A1 (en) 2001-08-24 2002-02-27 Implementing a physical layer automatic repeat request for a subscriber unit
US12/683,711 Expired - Fee Related US8102801B2 (en) 2001-08-24 2010-01-07 User equipment for physical layer automatic repeat request
US13/356,206 Abandoned US20120120928A1 (en) 2001-08-24 2012-01-23 User equipment for physical layer automatic repeat request
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US10/084,414 Expired - Lifetime US7149192B2 (en) 2001-08-24 2002-02-27 Base station implementing a physical layer automatic repeat request
US10/085,203 Abandoned US20030039220A1 (en) 2001-08-24 2002-02-27 Implementing a physical layer automatic repeat request for a subscriber unit
US12/683,711 Expired - Fee Related US8102801B2 (en) 2001-08-24 2010-01-07 User equipment for physical layer automatic repeat request
US13/356,206 Abandoned US20120120928A1 (en) 2001-08-24 2012-01-23 User equipment for physical layer automatic repeat request
US15/614,010 Abandoned US20170272205A1 (en) 2001-08-24 2017-06-05 User equipment for physical layer automatic repeat request

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