WO2010145068A1 - Procédé de transmission de données sur un canal de communication - Google Patents

Procédé de transmission de données sur un canal de communication Download PDF

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Publication number
WO2010145068A1
WO2010145068A1 PCT/CN2009/072270 CN2009072270W WO2010145068A1 WO 2010145068 A1 WO2010145068 A1 WO 2010145068A1 CN 2009072270 W CN2009072270 W CN 2009072270W WO 2010145068 A1 WO2010145068 A1 WO 2010145068A1
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WO
WIPO (PCT)
Prior art keywords
layers
transmission
reference signal
retransmission
channel
Prior art date
Application number
PCT/CN2009/072270
Other languages
English (en)
Inventor
Jianghua Liu
Mattias Wennstrom
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to PCT/CN2009/072270 priority Critical patent/WO2010145068A1/fr
Priority to CN200980156742.0A priority patent/CN102265576B/zh
Publication of WO2010145068A1 publication Critical patent/WO2010145068A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • 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
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • 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]
    • H04L1/1816—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of the same, encoded, message
    • 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
    • H04L1/1893—Physical mapping arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver

Definitions

  • the present invention concerns a method for transmission of data over a communications channel. It also concerns a mobile terminal for a mobile telecommunications system and a radio basestation for a mobile telecommunications system.
  • This invention relates to a method for transmission of data over a communications channel.
  • a communications channel is the downlink in an Orthogonal Frequency-Division Multiplexing (OFDM) system where the physical resources are preferably described in the frequency domain.
  • OFDM Orthogonal Frequency-Division Multiplexing
  • An example of an OFDM based system is the downlink in the 3GPP Long Term Evolution (LTE) Release 8 standard including its following releases.
  • LTE Long Term Evolution
  • the smallest resource unit is a resource element (RE) and a grid of 12 times 7 resource elements defines a resource block (RB) having 12 REs in the frequency direction and 7 REs in the time direction. Two RBs adjacent to each other in time direction makes up an RB pair, see Figure 1.
  • the RB may also have an extension in the antenna (or layer) direction in the case of multiple antenna transmission.
  • a resource element is indexed in three dimensions: frequency, time and antenna/layer, see Figure 2. These resource elements are used for transmitting data and also for transmitting control information and reference signals.
  • RBs can be stacked upon each other in the frequency direction. That is to say, that when a wider frequency band is available, more RBs can be sent in the same time frame.
  • the allocation of resources i.e. in which RB particular information should be sent, can be arbitrated by a scheduler.
  • the reference signals are transmitted in some resource elements that are pre-defined and known to both the receiving end and transmitting end of the radio communication link.
  • the resource elements within a resource block used for transmitting reference signals are sometimes known as the reference signal pattern, and this pattern repeats and is thus exactly the same in every resource block.
  • a different resource element pattern can be defined within each resource block. This pattern is thus distinct from the pattern used for transmitting reference signals or control signals; hence there is no collision between data and reference signals or control signals.
  • Hybrid Automatic Repeat reQuest In communication systems, such as the 3GPP LTE ReI.8 standard, Hybrid Automatic Repeat reQuest (HARQ) is utilized to recover from errors in the transmission. Basically, an error in a received packet is detected by a Cyclic Redundancy Check (CRC) code appended to the message and if a packet error is observed, a retransmission of that packet is requested through the feedback from the receiver to the transmitter of a Negative Acknowledgement (NACK) message, otherwise an Acknowledgement (ACK) message is fed back.
  • CRC Cyclic Redundancy Check
  • NACK Negative Acknowledgement
  • ACK Acknowledgement
  • the encoded codeword of information bits and parity bits are retransmitted without any modifications, thereby reusing the same packet of encoded bits in each retransmission and hence, the same number of resource elements is used as in the first transmission.
  • every retransmission is identical to the initial transmission and adds only extra energy to the receiver.
  • Incremental Redundancy a retransmission contains encoded bits that were not transmitted in a first transmission.
  • the information bits may need to be re-encoded (where rate matching is assumed to be included in the encoding) in a retransmission to give the receiver new information to aid the decoding process. Therefore, the number of resource elements used for the transmission may change between transmissions of an information package when incremental redundancy is used.
  • the receiver may choose to decode each retransmission independently or utilize some or all of previous transmissions of the same data block in the decoding process.
  • Chase combining is known to have the smallest complexity and memory requirements of the two HARQ schemes whereas IR has the potential for better performance.
  • the buffer size in the receiver increases for every IR retransmission and the receiver needs to store the soft bit values compared to Chase combining where soft symbol values can be stored, leading to a lower memory requirement.
  • Chase combining is a fundamental low complexity HARQ scheme and is therefore the baseline HARQ scheme used in many communication schemes based on retransmissions .
  • a block of encoded information bits is denoted a codeword.
  • MIMO Multiple-Input and Multiple-Output
  • multiple and independently encoded codewords i.e. different packets of encoded information bits
  • the first codeword can for instance be mapped to the first two antennas and a second codeword could be mapped the antennas three and four in a four antenna transmitter.
  • MIMO precoding is also commonly used and the precoding matrix, which may be selected by the receiver to optimize the link - A -
  • NxL where N is the number of transmit antennas and L is the number of layers (also known as the rank) .
  • the number of layers L can be smaller than the number of antennas N.
  • a maximum of two codewords are defined for a given transmission. Since the number of layers L may be larger than two, a codeword to layer mapping is defined in 3GPP LTE, which determines how each of the two codewords maps to the layers for a given value of L and N. See the example in Figure 3.
  • Reference signal patterns for channel estimation to aid the demodulation are inserted in the RB pair,
  • the resource elements with the same colour represent the reference signal pattern for one of the four layers and the resource elements used for reference signals of all layers, taken jointly, defines the reference signal pattern. If one resource element is used in one layer to transmit the reference signal for this layer, then this resource element may be left unused by all the other layers, to avoid interference between layers in the channel estimation. By this, orthogonal reference signals for the layers are obtained. Hence, in orthogonal reference signal transmission, not all resource elements in the reference signal pattern of a given layer is used to transmit reference signals.
  • the white resource elements represent the pattern used for data transmission and the chequered resource elements defines the pattern used for control signals.
  • the layers may also be transmitted to different users, known as multi-user MIMO (MU-MIMO) .
  • MU-MIMO multi-user MIMO
  • the MIMO precoding ensures that the interference between layers is low and non- orthogonal reference signals may then be used where a given resource element in the reference signal pattern is used by more than one layer to transmit the corresponding reference signal per layer.
  • the precoder then ensures low inter-layer interference between the reference signals.
  • the number of reference signals depend on the number of antennas.
  • 3GPP LTE-Advanced An example of a communication system employing a variable number of reference signals, dependent upon the number of layers, is 3GPP LTE-Advanced. These reference signals are in the 3GPP LTE-Advanced standard draft therefore user specific and layer specific and the reference signals for a given layer is thus precoded in the same way as the data transmission of that layer to the specific UE.
  • the same precoding vector used to precode layer n data (the data channel is known as the PDSCH in 3GPP terminology) is also used to precode the reference signals (or DeModulation Reference Signals (DMRS) in 3GPP terminology) which subsequently are used by the receiver to estimate the channel for data demodulation of that particular layer.
  • DMRS DeModulation Reference Signals
  • each layer in LTE advanced requires its own reference signal and all reference signals need to be orthogonal, more layers means more reference signal overhead. For example, an eight layer transmission requires eight reference signal patterns. Some overhead savings can be done through the use of Code Division Multiplexing (CDM) of the reference signals of different layers so that the total overhead of an eight layer transmission is not eight times the overhead of a single layer transmission, but probably less.
  • CDM Code Division Multiplexing
  • a main object is consequently to propose an improved method of transmission of data over a communications channel in a communications system.
  • this is accomplished by a method for transmission of data over a communications channel in a communications system using Hybrid Automatic Retransmission Request (HARQ), in which method is performed the steps of: for a first transmission procedure: - encoding data to be transmitted as data symbols in a number of C codewords, Ol ,
  • HARQ Hybrid Automatic Retransmission Request
  • the insights of the present invention is related to the use of Chase combining in HARQ in a system where the number of REs used for reference signals scales with the total number of layers and where a retransmission of only one of the multiple transmitted codewords is requested.
  • Figure 5 where in a first transmission four layers are transmitted so that pattern (a) is used and in a retransmission only one of the layers are transmitted so that reference signal pattern (b) is used.
  • the number of REs used for reference signals in the retransmission of this codeword is less than in the first transmission of this codeword. This means that the number of REs used for data transmission is larger in the retransmission than in the first transmission and hence, Chase combining can not be utilized by the retransmitted codeword.
  • the codeword to layer mapping of the transmitted codeword could be changed, so the codeword is in the retransmission mapped to the total number of layers used by all codewords in the first transmission.
  • the reference signal pattern of the original and the retransmission is the same (since the same number of layers is transmitted) .
  • Chase combining can not be used. Also, this mode of operation is not allowed in the 3GPP LTE ReI.8 or ReI.10 standard.
  • resource elements are used for channel estimation in the case of one or two layer transmission and 24 resource elements in case of more than two layer transmission.
  • the first transmission has three or more layers in total and a retransmission has one or two layers since one of the codewords were received correctly, there will be 24 REs used for reference symbols in the first transmission and 12 REs used for reference symbols in the retransmission. It further means that the number of REs for data (PDSCH) transmission will change and Chase combining of the retransmitted codeword is not possible .
  • PDSCH data
  • the channel estimator in the receiver needs to be reconfigured from a 24 RE reference signal pattern to a 12 RE reference signal pattern, which increase the channel estimator complexity.
  • a third problem is that the mapping of data (i.e. PDSCH) to RE will be different in retransmissions compared to first transmissions, which increase the complexity of the system.
  • the invention solves at least the mentioned problems by using the same number of resource elements for data symbols for a given codeword in the first transmission and all its retransmissions irrespectively of the total number of layers used, as explained earlier.
  • the object of the invention is accomplished by a mobile terminal and a radio basestation for a mobile telecommunications system having the features of claims 16 and 17 respectively. Benefits of this mobile terminal and radio basestation are similar to those that were attained according to the method of the invention.
  • Fig. 1 illustrates one Resource block pair consisting of a frequency-time grid of 12 times 14 resource elements
  • Fig. 2 illustrates the three dimensions time, frequency and antenna/layer needed to index a resource element.
  • Fig. 3 illustrates an example where two codewords are mapped to five layers and through a precoding matrix is mapped to eight antennas
  • Fig. 4 illustrates reference signal patterns for channel estimation to aid demodulation
  • Fig. 5 illustrates reference signal patterns for (a) four layer transmission (b) single layer transmission,
  • Fig. 6 illustrates FDM/TDM multiplexing of reference signals for four layers
  • Fig. 7 illustrates CDM multiplexing of reference signals for four layers
  • Fig. 8 illustrates hybrid CDM/FDM/TDM multiplexing of reference signals for four layers
  • Fig. 9 illustrates reference signal pattern of reference signals for retransmission of two layers
  • Fig. 10 illustrates reference signal pattern of reference signals for retransmission of two layers
  • Fig. 11 illustrates reference signal pattern of reference signals for retransmission of two layers
  • Fig. 12 illustrates reference signal resource elements used for a transmission of receiver specific non-precoded reference signals .
  • this invention proposes a method for transmission of data over a communications channel in a communications system using Hybrid Automatic Retransmission Request (HARQ) .
  • HARQ Hybrid Automatic Retransmission Request
  • a communications system can be any communication system where HARQ retransmissions are applicable, for instance a mobile radio communications system, a fixed wireless communication system such as a radio link, a link between a base station and a relay node in a wireless communication system or a wired connection such as a copper line or an optical fiber connection. It could also be a single user MIMO system where all layers are received by the same user equipment or a multi-user MIMO system where at least two layers are received by different user equipments.
  • This application from time to time refers to the context of the 3GPP LTE system; this is to be construed as an example only, the invention is applicable to any system using HARQ, as stated above.
  • the method of the invention comprises for a first transmission procedure the following steps: - encoding data to be transmitted as data symbols in a number of C codewords, Ol ,
  • the reference signal pattern is the pattern that arises in each of the layers due to the allocation of particular resource elements in those layers to hold reference signals for a transmission.
  • a reference signal sometimes denoted pilot, is a signal that is known to both the sender and the receiver in a communication system and facilitates the estimation of the communication channel.
  • the data symbol pattern is in a similar way the pattern that arises in each of the layers due to the allocation of particular resource elements in those layers to hold data symbols for a transmission.
  • the basic embodiment of the method of the invention further comprises for a subsequent HARQ retransmission procedure: - retransmitting a subset C' ⁇ C of said codewords of the first transmission using a subset L' ⁇ L of the L layers used in the first transmission, over the communications channel using the procedure of the first transmission.
  • these subsets are simply retransmitted using the steps of the first transmission with these subsets as the data to be transmitted.
  • the method is distinguished in that the procedure for the HARQ retransmission is amended such that data symbols of the C codewords in each retransmitted layer of said HARQ retransmission are mapped to a same number of resource elements used for data symbol transmission in said first transmission.
  • a variant of the method according to the invention may further comprise that the same reference signal pattern is used in the retransmission as in said first transmission.
  • a further variant of the method according to the invention may further comprise, possibly in combination with any other optional step of the method, that the same data symbol to resource element mapping is used in the retransmission as in said first transmission.
  • the old symbol to resource element mapping from the first transmission can be reused and therefore there is no need for any additional mapping of data symbols to layers, the old mapping is simply reused. Hence, computational effort is avoided and resources are spared.
  • the method according to the invention may be put to use over any communications channel where HARQ retransmissions are of use. Therefore, the method of the invention may further comprise, possibly in combination with any other optional step of the method, that the communication channel is a radio channel. However, other channels are possible, such as a communication channel established over a copper line.
  • the method according to the invention may further comprise that the radio channel is a Multiple Input Multiple Output (MIMO) communications radio channel.
  • MIMO Multiple Input Multiple Output
  • different layers of the L layers can be transmitted over different antennas of the MIMO channel.
  • the MIMO communications channel may be established as a multi-user MIMO system where at least two layers are received by different receivers, for instance different user equipments in a 3GPP communications system. There is thus no limitation on the type of MIMO to be used in connection with the invention.
  • DMRS demodulation reference signals
  • FDM/TDM frequency- or time- division multiplexing
  • the DMRS could also be code division multiplexed (CDM) as in Figure 7, Figure 7 illustrates CDM multiplexing of DMRS for four layers within the reference signal pattern of each layer.
  • CDM code division multiplexed
  • layer one and two are using the same DMRS reference signal resource element pattern but are separated by an orthogonal code in time and or in frequency direction. If a retransmission using layer 1+2 occurs in this case, in the present invention, the DMRS reference signal resource element pattern used for layer 3+4 will not be used for the data (i.e. PDSCH) retransmission of the codeword mapped to layer 1+2. Hence, the same data resource elements are used for the first transmission and retransmission and the number of physical resources used remains the same and thereby Chase combining is enabled for this codeword.
  • the DMRS reference signal resource element pattern for layer 3+4 in this example could be left unused as in the example shown in Figure 9, which illustrates a reference signal of DMRS for retransmission of two layers when first transmission contained a total of four layers.
  • the reference signal resource element pattern for layer 3+4 are used for transmitting reference signals for the layers used by the retransmitted codeword, e.g. layer 1+2 in this example. These reference signals per layer are thus precoded in the same way as the data for the corresponding layer.
  • the method according to the invention may thus further comprise, possibly in combination with any other optional step of the method, that any resource element used in the first transmission for reference signal (s) for layers already correctly received is reused in the retransmission for reference signal (s) for the retransmitted layer (s) .
  • any resource element used in the first transmission for reference signal (s) for layers already correctly received is reused in the retransmission for reference signal (s) for the retransmitted layer (s) .
  • the method according to the invention may further comprise that a multiplexing type of the reference signal (s) in the reused resource element (s) is the same as a multiplexing type of the reference signal (s) of the retransmitted layer (s) .
  • a multiplexing type of the reference signal (s) in the reused resource element (s) is the same as a multiplexing type of the reference signal (s) of the retransmitted layer (s) .
  • Fig. 10 illustrates reference signals of DMRS for retransmission of two layers when first transmission contained a total of four layers. The reference signals resource element pattern of the layers that are not used in retransmissions are re-used by the retransmitted layers.
  • the reference signal resource element pattern for layer 3+4 are also used for transmitting reference signals for the layers used by the retransmitted codeword, e.g. layer 1+2 in this example but CDM is not utilized. It is known that CDM is sensitive if the channel is not flat in time or frequency direction (due to large delay spread or large Doppler frequency) .
  • the method according to the invention may therefore further comprise that a multiplexing type of a reference signal (s) in the reused resource element (s) is different compared to a multiplexing type of the reference signal (s) of the retransmitted layer (s) .
  • FIG. 11 illustrates Reference signal of DMRS for retransmission of two layers when first transmission contained a total of four layers.
  • the reference signals resource element pattern of the layers that are not used in retransmissions are re-used by the retransmitted layers.
  • the resource elements in the reference signal pattern for the reference signal of layers already correctly received are used for transmitting a number of receiver-specific non-precoded reference signals, which can facilitate the receiver, for instance the scheduled User Equipment (UE) in a 3GPP system, to optimize the channel measurement.
  • the method according to the invention may further comprise, possibly in combination with any other optional step of the method, that any resource element used in the first transmission for reference signal (s) for layers already correctly received is reused in the retransmission for reference signal (s) for channel measurement. See Figure 12 for an example where there are four antenna ports in the communication system.
  • the number of antenna ports will decide the maximum of layers supported by the sender in the system, for instance an enhanced Node B in a 3GPP system.
  • the antenna port is defined by a reference signal which is common and used by any receiver, for instance all UEs in a 3GPP LTE cell, to perform channel measurement.
  • the common reference signal is non-precoded, i.e. without precoding. In order to reduce the overhead of reference signal, common reference signal has low density.
  • some non-precoded reference signals for the receiver, for instance the scheduled UE are transmitted on the resource elements in the reference signal pattern used for layer 3+4 to optimize the channel measurement performance.
  • the method according to the invention may further comprise that said reference signal (s) for channel measurement is non-precoded.
  • a number of symbols from said retransmitted codewords can be repeatedly transmitted on the resource elements in the reference signal pattern for the reference signal of layers already correctly received, layer 3+4 for instance to use terminology of previous examples.
  • the number of resource elements in the reference pattern for the reference signal of layers already correctly received is M, and then the first M number of symbols from said retransmitted codewords is repeated on these M number of available resource elements.
  • the allocated resource block (s) (or pairs) for the retransmission are changed because of resource scheduling.
  • the same reference signal pattern as the first transmission is defined and the retransmitted layers are mapped onto the available resource elements except for the reference signal pattern.
  • the resource elements in the reference signal pattern can be used for transmitting reference signals of retransmission layers, the non-precoded reference signal or can be empty.
  • the method according to the invention may further comprise, possibly in combination with any other optional step of the method, that the step of retransmitting is effected using a different frequency band compared to a first transmission.
  • the method according to the invention may further comprise, possibly in combination with any other optional step of the method, that the communications channel is an OFDM channel.
  • the method according to the invention may further comprise, possibly in combination with any other optional step of the method, that the communications system is a mobile communications system. This would for instance be the case when the method of the invention is applied to the 3GPP LTE system. It should be stated that all steps of the method according to the invention described above and all their different alternatives can be combined arbitrarily, just as long as such combinations does not imply a self-contradiction.
  • the invention encompasses a mobile terminal for a mobile telecommunications system that is distinguished by that it is adapted to perform HARQ retransmission of data over a communications channel according to any step of the method according to the invention.
  • the mobile terminal can be arranged to perform any step of the method according to the invention, described above, as desired for a particular application and from a mobile terminal point of view.
  • the notion that the mobile terminal is adapted to perform HARQ retransmission of data over a communications channel according to any step of the method according to the invention implies that it is provided with the necessary structures to put the method according to the invention in use. Such structures could involve an electronic memory, a microprocessor, a circuit for sending electric signals, etc.
  • the invention encompasses a radio basestation for a mobile telecommunications system, which is distinguished by that it is adapted to perform HARQ retransmission of data over a communications channel according to any step of the method according to the invention.
  • the radio basestation can be arranged to perform any step of the method according to the invention, described above, as desired for a particular application and from a radio basestation point of view.
  • the notion that the radio basestation is adapted to perform HARQ retransmission of data over a communications channel according to any step of the method according to the invention implies that it is provided with the necessary structures to put the method according to the invention in use. Such structures could involve an electronic memory, a microprocessor, a circuit for sending electric signals, etc.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de transmission de données par le biais d'un canal de communication dans un système de communication utilisant le procédé HARQ (Hybrid Automatic Retransmission Request). Pour une première procédure de transmission, le procédé consiste à : - coder les données en tant que symboles de données dans C mots codés, Ol, - mapper les symboles de données des C mots codés sur des éléments de ressource dans un motif de symbole de données dans L couches, - transmettre les L couches par le biais du canal de communication. Pour une procédure de transmission ultérieure par le procédé HARQ, le procédé consiste à : - retransmettre un sous-ensemble C' < C desdits mots codés sur le canal de communication en utilisant la procédure de la première transmission, la procédure pour la retransmission HARQ étant modifiée afin que les symboles de données des C mots codés soient associés à un même nombre d'éléments de ressource utilisés pour la transmission des symboles de données au cours de ladite première transmission. La présente invention concerne également un terminal mobile et une station de base radio destinés à un système de télécommunication mobile.
PCT/CN2009/072270 2009-06-15 2009-06-15 Procédé de transmission de données sur un canal de communication WO2010145068A1 (fr)

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CN200980156742.0A CN102265576B (zh) 2009-06-15 2009-06-15 经由通信信道传输数据的方法

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102598568A (zh) * 2009-10-29 2012-07-18 日本电气株式会社 用于下行链路mimo的下行链路控制信令传输
WO2012129798A1 (fr) * 2011-03-30 2012-10-04 Huawei Technologies Co., Ltd. Procédé et appareil utilisés pour une transmission en boucle ouverte dans un système de communication sans fils multi-antenne
WO2018058543A1 (fr) 2016-09-30 2018-04-05 Lenovo Innovations Limited (Hong Kong) Indication de retransmission

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017161590A1 (fr) * 2016-03-25 2017-09-28 Qualcomm Incorporated Csi-rs hybride amélioré pour fd-mimo
WO2019200605A1 (fr) * 2018-04-20 2019-10-24 Qualcomm Incorporated Techniques et appareils de signalisation concernant la répartition de débit utilisant des premières couches et des secondes couches
CN111917510B (zh) * 2019-05-08 2023-05-09 中国移动通信有限公司研究院 数据处理、指示数据处理的方法、终端及网络设备

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101043241A (zh) * 2006-03-20 2007-09-26 华为技术有限公司 多天线通信方法和系统
CN101330351A (zh) * 2007-06-20 2008-12-24 中兴通讯股份有限公司 基于循环缓存速率匹配的比特优先映射方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101043241A (zh) * 2006-03-20 2007-09-26 华为技术有限公司 多天线通信方法和系统
CN101330351A (zh) * 2007-06-20 2008-12-24 中兴通讯股份有限公司 基于循环缓存速率匹配的比特优先映射方法

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102598568A (zh) * 2009-10-29 2012-07-18 日本电气株式会社 用于下行链路mimo的下行链路控制信令传输
US20120213186A1 (en) * 2009-10-29 2012-08-23 Nec Corporation Downlink control signalling for downlink mimo
US8792445B2 (en) * 2009-10-29 2014-07-29 Nec Corporation Downlink control signalling for downlink MIMO
WO2012129798A1 (fr) * 2011-03-30 2012-10-04 Huawei Technologies Co., Ltd. Procédé et appareil utilisés pour une transmission en boucle ouverte dans un système de communication sans fils multi-antenne
CN103782560A (zh) * 2011-03-30 2014-05-07 华为技术有限公司 多天线无线通信系统中的开环传输的方法和装置
US8787485B2 (en) 2011-03-30 2014-07-22 Huawei Technologies Co., Ltd. Method and apparatus for open loop transmission in a multiple antenna wireless communication system
US9225409B2 (en) 2011-03-30 2015-12-29 Huawei Technologies Co., Ltd. Method and apparatus for open loop transmission in a multiple antenna wireless communication system
US9941947B2 (en) 2011-03-30 2018-04-10 Huawei Technologies Co., Ltd. Method and apparatus for open loop transmission in a multiple antenna wireless communication system
WO2018058543A1 (fr) 2016-09-30 2018-04-05 Lenovo Innovations Limited (Hong Kong) Indication de retransmission

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