[go: up one dir, main page]

US20120039342A1 - Arrangement and method for improving harq feedback in telecommunication systems - Google Patents

Arrangement and method for improving harq feedback in telecommunication systems Download PDF

Info

Publication number
US20120039342A1
US20120039342A1 US13/196,630 US201113196630A US2012039342A1 US 20120039342 A1 US20120039342 A1 US 20120039342A1 US 201113196630 A US201113196630 A US 201113196630A US 2012039342 A1 US2012039342 A1 US 2012039342A1
Authority
US
United States
Prior art keywords
ack
nack
channel
information elements
dtx
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US13/196,630
Other languages
English (en)
Inventor
Fredrik BERGGREN
Jianghua Liu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
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 US13/196,630 priority Critical patent/US20120039342A1/en
Assigned to HUAWEI TECHNOLOGIES CO., LTD. reassignment HUAWEI TECHNOLOGIES CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LIU, JIANGHUA, BERGGREN, FREDRIK
Publication of US20120039342A1 publication Critical patent/US20120039342A1/en
Priority to US13/779,340 priority patent/US8737342B2/en
Priority to US14/246,853 priority patent/US8976738B2/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0417—Feedback systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • 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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0072—Error control for data other than payload data, e.g. control data
    • H04L1/0073—Special arrangements for feedback channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1692—Physical properties of the supervisory signal, e.g. acknowledgement by energy bursts
    • 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
    • H04L1/12—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
    • H04L1/1861—Physical mapping arrangements

Definitions

  • the present application relates to a method and an arrangement in telecommunication systems, and in particular to an arrangement and a method for improving Hybrid Automatic Repeat Request, HARQ, feedback in a telecommunication system.
  • the 3rd Generation Partnership Project (3GPP) is a collaboration agreement that brings together a number of telecommunications standards bodies. Within the 3GPP workgroups a new system concept denoted Long Term Evolution (LTE) and System Architecture Evolution (SAE) are being standardized.
  • LTE Long Term Evolution
  • SAE System Architecture Evolution
  • the architecture of the 3GPP LTE/SAE system (denoted LTE here after), which is schematically illustrated in FIG. 1 , is flat compared to e.g. GSM (Global System for Mobile communications) and WCDMA (Wideband Code Division Multiple Access) based systems.
  • FIG. 1 The 3rd Generation Partnership Project
  • the LTE radio base stations 100 a , 100 b , 100 c (denoted eNodeBs, or eNBs, in 3GPP terminology) are directly connected to the core network nodes 101 a , 101 b MME/S-GWs (mobility management entity/serving gateway) via the S 1 interfaces 102 a , 102 b , 102 c , 102 d .
  • the S 1 interface supports a many-to-many relation between MMEs/Serving Gateways and eNBs.
  • E-UTRAN Evolved UMTS Terrestrial Radio Access Network
  • eNBs are connected to each other via the direct logical X2 interfaces 103 a , 103 b , 103 c .
  • a mobile phone being operated in such a system is an example of a user equipment denoted UE (not shown in FIG. 1 ).
  • multiple component carriers are aggregated in uplink and downlink, respectively.
  • the UE is configured to receive simultaneous transmissions on multiple downlink component carriers.
  • each component carrier is used for transmission of one transport block (two transport blocks in the presence of Multiple Input and Multiple Output, MIMO, systems).
  • MIMO Multiple Input and Multiple Output
  • the UE To receive such a transport block the UE must first detect that a block is incoming, more on this below. If the detection of a transport block is successful, the UE is configured to send an acknowledged message, an ACK, on the uplink and if the detection was unsuccessful, the UE is configured to send a not-acknowledged message, a NACK.
  • multiple ACK or NACK bits need to be transmitted from a UE in response to the transmitted transport block over different component carriers.
  • component carrier is related to a carrier frequency which is a term typically used when arranging measurements, and UEs then report cells on that carrier frequency.
  • cell is used for many other instances, such as mobility, which refers to a change of serving cell.
  • a cell may include both an uplink and a downlink direction of communication.
  • a UE can be assumed to have a Primary Serving Cell (PCell).
  • PCell Primary Serving Cell
  • the carrier corresponding to the PCell is the DL Primary Component Carrier (PCC) while in the UL it is the UL PCC.
  • PCell Secondary Serving Cell
  • carrier corresponding to the SCell is the DL Secondary Component Carrier (SCC) while in the UL it is the UL SCC.
  • SCC Secondary Component Carrier
  • carrier aggregation can equivalently be expressed as the aggregation of serving cells.
  • the UE needs to detect a downlink control channel before detecting the transport block.
  • a downlink control channel contains the downlink assignment information needed to receive the data channel and to decode the transport block. If the UE does not correctly receive the control channel, the UE is not aware of that it is expected to receive any data channel and it does not send any ACK or NACK on the uplink. This is referred to as discontinuous transmission (DTX).
  • DTX discontinuous transmission
  • the eNB knows when to expect a NACK or ACK and the eNB would have to initiate a re-transmission upon DTX detection.
  • the ACK/NACK signalling in the uplink may be erroneous.
  • a transmitted ACK may be received as a NACK, or a transmitted NACK may be received as an ACK.
  • Such a NACK-to-ACK (or ACK-to-NACK) error may introduce HARQ buffer corruption due to an erroneous combination of several transmissions.
  • An ACK-to-NACK error leads to inefficient system operation due to unnecessary retransmissions. It is therefore important to provide robust ACK/NACK signalling.
  • the LTE specifications list requirements on the ACK/NACK error performance.
  • Channel selection is one method that is capable for transmission of multiple ACK and NACK bits.
  • the transmission is performed by Quadrature Phase-Shift-Keying, QPSK, modulated sequences and the ACK/NACK information is encoded by both the selection of the channel, in the form of sequence, and the QPSK constellation point, i.e., the modulation symbol.
  • the channel selection refers to the selection of the sequence and several channels can be transmitted on the same frequency resource. That is, channels are obtained by Code Division Multiplexing, CDM, of sequences. Since only one sequence is selected and transmitted for one UE, channel selection preserves the single-carrier property of the signal.
  • CDM Code Division Multiplexing
  • This ACK/NACK feedback principle was used already in LTE Rel-8 for Time Division Duplex, TDD, where ACK/NACKs from multiple downlink subframes are signalled by one transmission in a single uplink subframe. This is in the standard referred to as transmission of ACK/NACK multiplexing.
  • channel selection will also be used, but in the context of conveying ACK/NACKs from multiple component carriers. This applies for UEs with maximum capability of four ACK/NACK bits and also includes the Frequency Division Duplex, FDD, case.
  • Each transport block generally requires one ACK/NACK bit, thus four ACK/NACK bits could, e.g., correspond to a configuration of two component carriers with MIMO transmission on each carrier.
  • ACK/NACK/DTX To encode the ACK/NACK/DTX information, a mapping is needed between the different states of ACK, NACK and DTX and the channels and QPSK constellation points. This can also be referred to as an ACK/NACK codebook.
  • Transmission of ACK/NACKs for carrier aggregation by means of channel selection requires a codebook where for each valid combination of ACK/NACK/DTX, one channel and one constellation point should be assigned.
  • the codebook design impacts the ACK-to-NACK and NACK-to-ACK error probabilities.
  • an apparatus configured to operate in a telecommunications network, said apparatus comprising a controller or processor configured to encode a plurality of uplink feedback information elements for carrier aggregation, by a set of codewords where each codeword comprises a channel, wherein at least two information elements have the same channel distribution.
  • Such an apparatus is able to provide an error performance being substantially equal among the ACK/NACK bits.
  • a codebook comprises any combination of ACK and NACK.
  • a codebook comprises any combination of ACK and NACK and DTX.
  • a codebook comprises any combination of ACK and NACK/DTX.
  • the aspects of the disclosed embodiments are also directed to providing a method for execution on an apparatus configured to operate in a telecommunications network comprising a processor, wherein said processor is configured to execute said method, said method comprising encoding a plurality of uplink feedback information elements for carrier aggregation, by a set of codewords where each codeword comprises a channel, wherein at least two information elements have the same channel distribution.
  • the aspects of the disclosed embodiments are also directed to providing a computer readable medium including at least computer program code for controlling an apparatus configured to operate in a telecommunications network, said computer readable medium comprising software code for encoding a plurality of uplink feedback information elements for carrier aggregation, by a set of codewords where each codeword comprises a channel, wherein at least two information elements have the same channel distribution.
  • the aspects of the disclosed embodiments are also directed to providing a second apparatus configured to receive feedback information elements generated by a method or apparatus according to above.
  • such a second apparatus is a base station.
  • FIG. 1 is an overview of a telecommunications system in which an arrangement according to the present application is used according to an embodiment
  • FIG. 2 is a schematic view of error probabilities for different feedback bits according to signal to noise ratio according to a prior art system
  • FIG. 3 is a schematic view of error probabilities for different error sources according to signal to noise ratio
  • FIG. 4 is a schematic view of error probabilities for different channel distribution according to signal to noise ratio
  • FIG. 5 is a schematic view of error probabilities for different feedback bits according to signal to noise ratio according to an embodiment
  • FIG. 6 is a flow chart describing a method according to an embodiment
  • FIG. 7 is a schematic view of an apparatus according to an embodiment.
  • FIG. 2 shows simulation results for the ACK/NACK detection error probabilities for each ACK/NACK bit, using the codebook of Table 1. It is clear from FIG. 2 that especially for NACK->ACK the error probabilities for the different bits are very different (see the curves marked Pr(NACK->ACK)).
  • the channels used for transmission need to be unique for each UE.
  • the assignment of a channel to a UE is sometimes referred to as resource reservation.
  • the channels are implicitly determined from the time-frequency position of the control channels containing the downlink assignments that are associated with the shared data channels transmitting the transport blocks in the different downlink subframes.
  • Implicit resource reservation schemes can also be considered for channel selection for carrier aggregation. That is for aggregation of two component carriers, channels n PUCCH (0), n PUCCH (1) (PUCCH—Physical Uplink Control Channel) is determined from a downlink control channel on a first component carrier, and channels n PUCCH (2), n PUCCH (3) are determined from a downlink control channel on a second component carrier.
  • PUCCH Physical Uplink Control Channel
  • this application teaches to use at least two HARQ acknowledgements, such as uplink feedback information elements, in carrier aggregation.
  • ACKs (or NACKs) are encoded by using constellation points that are as closely located as possible.
  • all information elements have the same channel distribution.
  • all information elements have the same modulation symbol distribution.
  • a reason for the differing error performance of the prior art system shown in FIG. 2 stems from that the detection of the channel is often more reliable than the detection of the QPSK constellation symbol.
  • the detection performance of channel and modulation symbol in terms of codeword error probability is shown in FIG. 3 .
  • a codeword is defined as the concatenation of the channel and the bits of the QPSK symbol ([n PUCCH , QPSK]). More precisely b( 0 ) and b( 1 ) denote the bits, taking value 0 or value 1, that are conveyed by the complex-valued QPSK modulation symbol.
  • the UE For transmission of a codeword, the UE shall transmit bits b( 0 ) and b( 1 ) on ACK/NACK resource n PUCCH .
  • the QPSK symbol comprising b( 0 ) and b( 1 )
  • the codeword should modulate the sequence corresponding to n PUCCH .
  • the codeword If at least one element of codeword (either channel or QPSK symbol) is not correct, the codeword will be assumed to be an error.
  • the performance of the codeword is dominated by the instance when the case channel is correct and QPSK symbol is wrong, and the error probability of other cases related to wrong channel is marginal. Hence the detection of the channel is more reliable than that of QPSK symbol.
  • the assignment of codewords to ACK/NACK/DTX states therefore becomes crucial to the performance.
  • a codeword consists of a channel and a QPSK constellation symbol (or the bits b( 0 ) and b( 1 ) of the constellation symbol), more on this below. Thus an error may occur in either one or both of these.
  • One is to focus on the constellation points of the QPSK and the other is to focus on the channel distribution.
  • an ACK or NACK error may occur when an erroneous or wrong constellation point is detected, when the channel is correctly detected.
  • the constellation points are chosen such that constellation points that are closely located should represent the same information. This provides the possibility that even if a codeword is erroneously detected there might not be an error.
  • the teachings herein require that the detection error is substantial before an error in ACK/NACK is detected.
  • closely located point pairs are (00, 01), (01, 00), (01, 11) and (10, 11) and should represent the same information. And (00,11) and (01,10) are remotely located and should NOT represent the same information.
  • 00 and 01 represents ACK and 10 and 11 represents NACK.
  • the term ‘closest located’ is to be interpreted as a Euclidean distance when the constellation points are equiprobable, i.e. equally likely.
  • a controller or processor is configured to use table 2 as a codebook.
  • HARQ-ACK(0) is ACK
  • the following codewords are eligible: [2,0,1], [1,1,0], [3,1,1], [0,0,0], [0,0,1], [2,1,0], [2,1,1], [1,1,1] using the notation [n PUCCH , QPSK], QPSK being of the form b( 0 ), b( 1 ) (b( 0 ) is one of 0,1 and b( 1 ) is one of 0,1).
  • the state of HARQ-ACK(0) is still an ACK and no error occurs for the bit HARQ-ACK(0).
  • an error only occurs if QPSK symbol ‘00’ is detected as ‘10’ or ‘11’ (or ‘01’ is detected as ‘10’ or ‘11’).
  • the two constellation points are the closest possible and represent the same information (i.e. ACK) for HARQ-ACK(0).
  • channel ‘1’ the QPSK symbols representing an ACK are the closest possible, i.e., ‘10’ and ‘11’.
  • channel ‘3’ occurs three times in the above listing and thus any three QPSK constellation points will be located next to each other. It is clear from Table 2 that this principle of mapping the constellation points applies to any HARQ-ACK bit, for any state ACK or NACK/DTX. Hence, equal detection performance is provided by the codebook of Table 2.
  • the distribution of the channels for encoding the ACK or NACKs is of relevance for achieving equal error performance among ACK/NACK bits.
  • Channel distribution will be more precisely described below and refers to the distribution of the number of codewords comprising a certain channel for a given ACK/NACK bit. The impact of the channel distribution is evident as shown in the following two cases.
  • the processor is configured to use Gray coded QPSK.
  • the symbol error probabilities are obtained from the following expressions;
  • the error probability of a NACK (or ACK) for a channel being contained in n codewords that encode a NACK (or ACK) bit becomes:
  • n i (j) the number of codewords including channel i for encoding a NACK for a given bit HARQ-ACK(j) is used. See Table 3 which gives the error probabilities for different channel distribution. Table 3 has been constructed by taking the error probabilities above and multiplying with the respective conditional probability of usage of the codeword. Table 3 is related to NACKs but the same teaching also applies to ACKs. FIG. 4 shows the corresponding plots for the probabilities. Each line denoted by the set [nnn] represents the channel distribution.
  • a phase error will remain since the sequence (i.e., the channel) is not correctly detected.
  • the processor is therefore configured to assume that the detected QPSK constellation point is random and there is about equal probability for any QPSK symbol. Any codeword that does not include the correct channel is therefore equally probable. For a given ACK/NACK bit, a NACK-to-ACK error will then occur if the decoded codeword represents ACK and does not include the correct channel. For a given channel distribution, the error probability is expressed as:
  • Table 4 shows the error probabilities for the different channel distributions.
  • the detection performance of a channel is more reliable than the detection of a QPSK modulation symbol and the performance of NACK-to-ACK or ACK-to-NACK is mainly determined by Case I, i.e. when the channel is correctly detected.
  • Case I the channel distribution of different HARQ-ACK bit as analyzed in Table 3 will dominate the performance of different HARQ-ACK bit.
  • the inventors have realized that the reason for the unequal performance is a result of that multiple channel distributions are used for different HARQ-ACK bits.
  • the prior art codebook of Table 1 gives the following channel distributions for the NACK or NACK/DTX states.
  • a codebook wherein at least two ACK/NACK bits has the same channel distribution. It is clear from Table 3 and 4 that the error probability for a given distribution is independent on the order of the elements. Thus, the teaching of this application provide a solution where the same channel distribution for two ACK/NACK bits is defined as having the same set of values ⁇ n i (j) ⁇ , but not considering the order of the elements in this set.
  • the table below contains the channel distributions for the codebook of Table 2. It is clear from the table below that all ACK/NACK bits j have the same channel distribution, i.e., the same set of values.
  • the constellation distribution also has an impact on the performance and may cause different performance for different channels.
  • m i (j) the number of codewords for which constellation point i is utilized for encoding a NACK for a given bit HARQ-ACK(j).
  • Table 1 results in a constellation distribution for NACK and NACK/DTX shown below, where it is assumed that:
  • FIG. 5 shows the performance of an arrangement using the codebook of table 2. As can be seen the performance of the different feedback information elements are much more equal thus giving a more desired performance. Compare for example the error probabilities for NACK->ACK of FIG. 2 and FIG. 5 (the curves marked Pr(NACK->ACK)). This is due to that there is the same channel and constellation distribution for different HARQ-ACK bit of the proposed codebook, they have equal performance for different HARQ-ACK.
  • a processor is configured to implement a codebook as outlined above for three ACK/NACK bits.
  • the codebook would comprise one component carrier supporting MIMO and one component carrier without MIMO.
  • Such a codebook can support 12 states when three channels are reserved and using QPSK modulation.
  • One example of such a codebook is given in Table 5, where HARQ-ACK(0) and HARQ-ACK(1) represent ACK/NACK bits on a first component carrier supporting MIMO and HARQ-ACK(2) represent an ACK/NACK bit on a second component carrier or channel with SIMO.
  • a controller or processor is configured to use table 5 as a codebook.
  • Table 6 shows a codebook according to another embodiment. This codebook has three bits wherein two channels are reserved. This codebook supports eight states.
  • a controller or processor is configured to use table 6 as a codebook.
  • a codebook for N information elements i.e. HARQ-ACK
  • N1 (N1 ⁇ N) information elements need to be transmitted and a codebook for N1 information elements is needed.
  • the new codebook for N1 information elements can be derived from the defined codebook for N information elements. The following are example embodiments of the above.
  • two component carriers are configured to support MIMO transmission with two transport blocks, and there are four HARQ-ACK bits (HARQ-ACK(0), HARQ-ACK(1), HARQ-ACK(2) and HARQ-ACK(3)) in response to the MIMO transmission at these two component carriers.
  • HARQ-ACK(0) and HARQ-ACK(1) respond to the two transport blocks at the first component carrier and the remaining two HARQ-ACK bits are for the two transport blocks of the second component carrier.
  • the codebook for such 4 bits HARQ-ACK multiplexing is shown in Table 7 designed according to the disclosure, and the corresponding channel distribution is shown below.
  • HARQ-ACK(0), HARQ-ACK(1) and HARQ-ACK(2) are needed.
  • the codebook for the three bits HARQ-ACK mapping can be derived from the 4 bits codebook (Table 7) by using HARQ-ACK(0), HARQ-ACK(1) and HARQ-ACK(3), and deleting rows 3, 7, 12 and 16.
  • Table 8 The constructed new codebook is illustrated in Table 8.
  • Another embodiment is, there is the same assumption as the above embodiment, where two component carriers support MIMO transmission with two transport blocks each and there are four corresponding HARQ-ACK bits using codebook as Table 7.
  • the relation between the state of three HARQ-ACK bits and the codeword in codebook Table 7 is [HARQ-ACK(0), HARQ-ACK(1), HARQ-ACK(2), X], where X depends on HARQ-ACK(2).
  • HARQ-ACK(2) is ACK or NACK
  • X is ACK; otherwise X is NACK/DTX. According to the state of the three bits, there will be one corresponding codeword from the defined codebook.
  • the corresponding codeword will be entry number 10, i.e. [NACK/DTX, NACK/DTX, NACK/DTX, NACK/DTX, NACK/DTX].
  • entry number 10 i.e. [NACK/DTX, NACK/DTX, NACK/DTX, NACK/DTX].
  • eNB knows that there are only three HARQ-ACK bits, it can derive that the state of the three bits is [NACK, NACK, DTX] when the entry number 10 is detected. In this case, some codewords are invalid, e.g. [ACK, ACK, ACK, NACK].
  • table 1 represents an aggregation of two component carriers, each component carrier supporting MIMO transmission.
  • Table 2 represents a codebook also having an aggregation of two component carriers. This follows from that HARQ-ACK(0) and HARQ-ACK(1) (or HARQ-ACK(2) and HARQ-ACK(3)) must be in DTX simultaneously, as encoded by entry numbers 10, 14, 15 and 16 (or 4, 8, 10, 13).
  • Table 9 a codebook is provided which allows independent states of DTX among the HARQ-ACK(j) items representing different component carriers. Such a general codebook is obtained by only considering the two states ACK and NACK/DTX. Table 9 is constructed by replacing NACK with NACK/DTX in Table 2.
  • Table 2 can be derived from Table 9.
  • a person skilled in the art could easily identify the NACK/DTX states that would not be eligible if two component carriers with MIMO is assumed, for which Table 9 would reduce to Table 2.
  • a codebook for the case of aggregating two component carriers without MIMO with one component carrier with MIMO could be deduced from the general Table 9 by replacing non-applicable combinations of NACK/DTX with NACK or DTX, respectively.
  • each codeword corresponds to exactly one entry number, i.e., one information state. However, in one embodiment one codeword corresponds to more than one entry number.
  • a codebook thus allows for more information states to be fed back.
  • a receiver is configured to decide on which is the most suitable interpretation of the codeword in terms of information state.
  • LTE Rel-8 there are more entries in the table than codewords, so a codeword may represent multiple information entities and it would be up to the eNB to decide how to interpret such a codeword.
  • the teachings herein thus disclose a method for encoding uplink information elements as is shown in FIG. 6 , where a channel distribution is effected, wherein at least two information elements share a channel, 610 .
  • the channel distribution is stored in a codebook 620 and used for encoding an uplink feedback 630 .
  • FIG. 7 shows a schematic view of an example apparatus in or user equipment in the form of a mobile phone.
  • the mobile phone 700 has a loudspeaker 702 for outputting sound and a display 703 for outputting graphics.
  • the display 703 is a touchscreen.
  • the mobile phone 700 also has a set of keys 704 which in this example embodiment consist of two softkeys 704 b and 704 c and a number of text/number input keys 704 a .
  • the phone also has a microphone 706 for inputting voice commands or sounds.
  • the mobile phone 700 is further arranged with internal circuitry 705 shown with a dashed rectangle in FIG. 7 .
  • the internal circuitry 705 comprises a processor and a memory for storing executable program code, instructions, data and drivers for various accessories, such as Global Positioning System devices, pulse monitors, displays and media players for example.
  • the teaching of this application can also be embodied as computer readable code on a computer readable storage medium.
  • Such storage mediums may be a random access memory, a read-only memory, a compact disc, a digital video disc, an EEPROM memory or other computer readable storage mediums.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Mobile Radio Communication Systems (AREA)
US13/196,630 2010-08-13 2011-08-02 Arrangement and method for improving harq feedback in telecommunication systems Abandoned US20120039342A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US13/196,630 US20120039342A1 (en) 2010-08-13 2011-08-02 Arrangement and method for improving harq feedback in telecommunication systems
US13/779,340 US8737342B2 (en) 2010-08-13 2013-02-27 Arrangement and method for improving HARQ feedback in telecommunication systems
US14/246,853 US8976738B2 (en) 2010-08-13 2014-04-07 Arrangement and method for improving HARQ feedback in telecommunication systems

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US37339910P 2010-08-13 2010-08-13
PCT/CN2011/075380 WO2012019480A1 (fr) 2010-08-13 2011-06-07 Configuration et procédé permettant d'améliorer des informations de rétroaction harq dans des systèmes de télécommunications
US13/196,630 US20120039342A1 (en) 2010-08-13 2011-08-02 Arrangement and method for improving harq feedback in telecommunication systems

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2011/075380 Continuation WO2012019480A1 (fr) 2010-08-13 2011-06-07 Configuration et procédé permettant d'améliorer des informations de rétroaction harq dans des systèmes de télécommunications

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US13/779,340 Continuation US8737342B2 (en) 2010-08-13 2013-02-27 Arrangement and method for improving HARQ feedback in telecommunication systems

Publications (1)

Publication Number Publication Date
US20120039342A1 true US20120039342A1 (en) 2012-02-16

Family

ID=45567342

Family Applications (3)

Application Number Title Priority Date Filing Date
US13/196,630 Abandoned US20120039342A1 (en) 2010-08-13 2011-08-02 Arrangement and method for improving harq feedback in telecommunication systems
US13/779,340 Active US8737342B2 (en) 2010-08-13 2013-02-27 Arrangement and method for improving HARQ feedback in telecommunication systems
US14/246,853 Active US8976738B2 (en) 2010-08-13 2014-04-07 Arrangement and method for improving HARQ feedback in telecommunication systems

Family Applications After (2)

Application Number Title Priority Date Filing Date
US13/779,340 Active US8737342B2 (en) 2010-08-13 2013-02-27 Arrangement and method for improving HARQ feedback in telecommunication systems
US14/246,853 Active US8976738B2 (en) 2010-08-13 2014-04-07 Arrangement and method for improving HARQ feedback in telecommunication systems

Country Status (3)

Country Link
US (3) US20120039342A1 (fr)
CN (1) CN103026770B (fr)
WO (1) WO2012019480A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120287828A1 (en) * 2010-11-12 2012-11-15 Qualcomm Incorporated Acknowledgement / negative acknowledgement feedback for tdd
US20130208691A1 (en) * 2010-10-11 2013-08-15 Lg Electronics Inc. Method for transmitting control information and apparatus for same
WO2014025237A1 (fr) * 2012-08-09 2014-02-13 엘지전자 주식회사 Procédé et appareil pour transmettre un accusé de réception
US8737342B2 (en) * 2010-08-13 2014-05-27 Huawei Technologies Co., Ltd. Arrangement and method for improving HARQ feedback in telecommunication systems
CN107005372A (zh) * 2015-08-11 2017-08-01 华为技术有限公司 一种传输反馈信息的方法、用户设备和接入设备
US10819405B2 (en) * 2017-12-04 2020-10-27 University Of Notre Dame Du Lac Mitigating beam squint in millimeter wave wireless communication systems
CN113273108A (zh) * 2019-01-07 2021-08-17 诺基亚技术有限公司 使用神经网络检测帧中传输的控制信息

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114157400B (zh) * 2019-02-15 2024-04-16 华为技术有限公司 一种码本的处理方法及装置

Citations (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6807154B1 (en) * 1998-10-12 2004-10-19 Telefonaktiebolaget Lm Ericsson Link and radio cell adaptation in TDD systems
US20060285606A1 (en) * 2005-06-01 2006-12-21 Nec Laboratories America, Inc. Quantized Power Control in Multiple Antenna Communication System
US20070159969A1 (en) * 2005-12-22 2007-07-12 Arnab Das Methods and apparatus for communicating transmission backlog information
US20070189151A1 (en) * 2006-02-10 2007-08-16 Interdigital Technology Corporation Method and apparatus for performing uplink transmission in a multiple-input multiple-output single carrier frequency division multiple access system
US7639660B2 (en) * 2003-12-17 2009-12-29 Electronics And Telecommunications Research Institute Apparatus for OFDMA transmission and reception for coherent detection in uplink of wireless communication system and method thereof
US20100098012A1 (en) * 2008-10-20 2010-04-22 Interdigital Patent Holdings, Inc. Uplink control information transmission methods for carrier aggregation
US20100118803A1 (en) * 2007-03-19 2010-05-13 Ntt Docomo, Inc. Base station apparatus, mobile station, radio communication system, and communication control method
US7810009B2 (en) * 2005-10-21 2010-10-05 Samsung Electronics Co., Ltd. Apparatus and method for transmitting and receiving packet data using HARQ in a mobile communication system
US20100278034A9 (en) * 2003-05-16 2010-11-04 Rajiv Laroia Efficient signal transmission methods and apparatus using a shared transmission resource
US20100329159A1 (en) * 2008-02-05 2010-12-30 Shuqiang Xia Physical uplink control signal transmitting method for time division duplex system
US7894324B2 (en) * 2005-03-08 2011-02-22 Qualcomm Incorporated Methods and apparatus for signaling data rate option information
US20110085502A1 (en) * 2009-10-09 2011-04-14 Qualcomm Incorporated Blind decoding of uplink control channels
US20110200015A1 (en) * 2010-02-12 2011-08-18 Qualcomm Incorporated Flexible uplink control channel configuration
US20110205996A1 (en) * 2008-10-30 2011-08-25 Ki Hwan Kim Method of harq acknowledgement transmission and transport block retransmission in a wireless communication system
US20110249656A1 (en) * 2010-02-12 2011-10-13 Interdigital Patent Holdings, Inc. Sending Feedback for Multiple Downlink Carriers
US20120147841A1 (en) * 2008-03-25 2012-06-14 Samsung Electronics Co., Ltd. System and method for the placement of rank information in a physical uplink shared channel
US8205130B2 (en) * 2007-04-27 2012-06-19 Sony Corporation Decoding apparatus
US20120218955A1 (en) * 2003-05-13 2012-08-30 Panasonic Corporation Radio base station apparatus, radio network controller apparatus, communication terminal apparatus, transmission signal generation method, and radio communication system
US8305986B2 (en) * 2009-03-09 2012-11-06 Samsung Electronics Co., Ltd. Method and apparatus for uplink transmissions and CQI reports with carrier aggregation
US8340043B2 (en) * 2009-04-24 2012-12-25 Sharp Kabushiki Kaisha Wireless communication system, communication device, and communication method
US20130077595A1 (en) * 2010-06-14 2013-03-28 Sharp Kabushiki Kaisha User equipment, base station apparatus, communication system and mobile communication methods for uplink control information

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101636962A (zh) * 2007-03-14 2010-01-27 交互数字技术公司 在演进型utra中对ack/nack和传输功率控制反馈的传输
CN101646237A (zh) * 2008-08-05 2010-02-10 三星电子株式会社 产生ack/nack信息的方法
US9001802B2 (en) * 2008-08-11 2015-04-07 Lg Electronics Inc. Method and apparatus for transmitting uplink signals using multi-antenna
CN101674164A (zh) * 2008-09-11 2010-03-17 三星电子株式会社 反馈ack/nack信息方法
CN101588224B (zh) * 2009-05-19 2014-07-02 中兴通讯股份有限公司 一种发送正确/错误应答消息的方法及系统
US8374260B2 (en) * 2009-06-22 2013-02-12 Motorola Mobility Llc Method and apparatus for implementing uplink transmit diversity in a switched antenna orthogonal frequency division multiplexing communication system
CN102714579B (zh) * 2009-09-30 2014-12-24 交互数字专利控股公司 用于上行链路中多天线传输的方法和设备
US8767797B2 (en) * 2009-10-05 2014-07-01 Qualcomm Incorporated Apparatus and method for providing HARQ feedback in a multi-carrier wireless communication system
KR101761618B1 (ko) * 2010-06-25 2017-07-26 엘지전자 주식회사 무선 통신 시스템에서 제어 정보의 전송 방법 및 장치
CN103026770B (zh) * 2010-08-13 2015-03-11 华为技术有限公司 用于改善通信系统中的harq反馈的装置及方法

Patent Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6807154B1 (en) * 1998-10-12 2004-10-19 Telefonaktiebolaget Lm Ericsson Link and radio cell adaptation in TDD systems
US20120218955A1 (en) * 2003-05-13 2012-08-30 Panasonic Corporation Radio base station apparatus, radio network controller apparatus, communication terminal apparatus, transmission signal generation method, and radio communication system
US20100278034A9 (en) * 2003-05-16 2010-11-04 Rajiv Laroia Efficient signal transmission methods and apparatus using a shared transmission resource
US7639660B2 (en) * 2003-12-17 2009-12-29 Electronics And Telecommunications Research Institute Apparatus for OFDMA transmission and reception for coherent detection in uplink of wireless communication system and method thereof
US7894324B2 (en) * 2005-03-08 2011-02-22 Qualcomm Incorporated Methods and apparatus for signaling data rate option information
US20060285606A1 (en) * 2005-06-01 2006-12-21 Nec Laboratories America, Inc. Quantized Power Control in Multiple Antenna Communication System
US7810009B2 (en) * 2005-10-21 2010-10-05 Samsung Electronics Co., Ltd. Apparatus and method for transmitting and receiving packet data using HARQ in a mobile communication system
US20070159969A1 (en) * 2005-12-22 2007-07-12 Arnab Das Methods and apparatus for communicating transmission backlog information
US20070189151A1 (en) * 2006-02-10 2007-08-16 Interdigital Technology Corporation Method and apparatus for performing uplink transmission in a multiple-input multiple-output single carrier frequency division multiple access system
US20100118803A1 (en) * 2007-03-19 2010-05-13 Ntt Docomo, Inc. Base station apparatus, mobile station, radio communication system, and communication control method
US8205130B2 (en) * 2007-04-27 2012-06-19 Sony Corporation Decoding apparatus
US20100329159A1 (en) * 2008-02-05 2010-12-30 Shuqiang Xia Physical uplink control signal transmitting method for time division duplex system
US20120147841A1 (en) * 2008-03-25 2012-06-14 Samsung Electronics Co., Ltd. System and method for the placement of rank information in a physical uplink shared channel
US20120327911A1 (en) * 2008-03-25 2012-12-27 Samsung Electronics Co., Ltd. System and method for the placement of rank information in a physical uplink shared channel
US20100098012A1 (en) * 2008-10-20 2010-04-22 Interdigital Patent Holdings, Inc. Uplink control information transmission methods for carrier aggregation
US20110205996A1 (en) * 2008-10-30 2011-08-25 Ki Hwan Kim Method of harq acknowledgement transmission and transport block retransmission in a wireless communication system
US8305986B2 (en) * 2009-03-09 2012-11-06 Samsung Electronics Co., Ltd. Method and apparatus for uplink transmissions and CQI reports with carrier aggregation
US8340043B2 (en) * 2009-04-24 2012-12-25 Sharp Kabushiki Kaisha Wireless communication system, communication device, and communication method
US20110085502A1 (en) * 2009-10-09 2011-04-14 Qualcomm Incorporated Blind decoding of uplink control channels
US20110249656A1 (en) * 2010-02-12 2011-10-13 Interdigital Patent Holdings, Inc. Sending Feedback for Multiple Downlink Carriers
US20110200015A1 (en) * 2010-02-12 2011-08-18 Qualcomm Incorporated Flexible uplink control channel configuration
US20130077595A1 (en) * 2010-06-14 2013-03-28 Sharp Kabushiki Kaisha User equipment, base station apparatus, communication system and mobile communication methods for uplink control information

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8737342B2 (en) * 2010-08-13 2014-05-27 Huawei Technologies Co., Ltd. Arrangement and method for improving HARQ feedback in telecommunication systems
US8976738B2 (en) 2010-08-13 2015-03-10 Huawei Technologies Co., Ltd. Arrangement and method for improving HARQ feedback in telecommunication systems
US10785756B2 (en) 2010-10-11 2020-09-22 Lg Electronics Inc. Method for transmitting control information and apparatus for same
US20130208691A1 (en) * 2010-10-11 2013-08-15 Lg Electronics Inc. Method for transmitting control information and apparatus for same
US9491743B2 (en) * 2010-10-11 2016-11-08 Lg Electronics Inc. Method for transmitting control information and apparatus for same
US10292141B2 (en) 2010-10-11 2019-05-14 Lg Electronics Inc. Method for transmitting control information and apparatus for same
US20120287828A1 (en) * 2010-11-12 2012-11-15 Qualcomm Incorporated Acknowledgement / negative acknowledgement feedback for tdd
US10873425B2 (en) * 2010-11-12 2020-12-22 Qualcomm Incorporated Acknowledgement / negative acknowledgement feedback for TDD
US11722264B2 (en) 2010-11-12 2023-08-08 Qualcomm Incorporated Acknowledgement / negative acknowledgement feedback for TDD
WO2014025237A1 (fr) * 2012-08-09 2014-02-13 엘지전자 주식회사 Procédé et appareil pour transmettre un accusé de réception
US9515781B2 (en) 2012-08-09 2016-12-06 Lg Electronics Inc. Method and apparatus for transmitting acknowledgement
CN107005372A (zh) * 2015-08-11 2017-08-01 华为技术有限公司 一种传输反馈信息的方法、用户设备和接入设备
US10819405B2 (en) * 2017-12-04 2020-10-27 University Of Notre Dame Du Lac Mitigating beam squint in millimeter wave wireless communication systems
CN113273108A (zh) * 2019-01-07 2021-08-17 诺基亚技术有限公司 使用神经网络检测帧中传输的控制信息

Also Published As

Publication number Publication date
US8976738B2 (en) 2015-03-10
US20130176963A1 (en) 2013-07-11
US20140219372A1 (en) 2014-08-07
WO2012019480A1 (fr) 2012-02-16
US8737342B2 (en) 2014-05-27
CN103026770B (zh) 2015-03-11
CN103026770A (zh) 2013-04-03

Similar Documents

Publication Publication Date Title
US8976738B2 (en) Arrangement and method for improving HARQ feedback in telecommunication systems
US9628223B2 (en) Bundling of ack information in a wireless communication system
KR102127021B1 (ko) 캐리어 어그리게이션을 위한 업링크 ｈａｒｑ 및 ｃｓｉ 다중화를 위한 방법 및 시스템
US8837450B2 (en) Transmissionof HARQ control information from a user equipment for downlink carrier aggregation
KR101808820B1 (ko) 캐리어 집적 다운링크 tdd 시스템에서의 수신확인 정보 생성 및 전력 제어
US8165035B2 (en) ACK/NACK DTX detection
EP3270535B1 (fr) Procédé, équipement d'utilisateur et station de base pour émission d'informations de commande
US9723597B2 (en) Method, device and system for transmitting control information
WO2019137356A1 (fr) Systèmes et procédés pour une transmission fiable sur des ressources de réseau
CN101958777B (zh) 正确/错误应答消息发送的处理方法及装置
US10727985B2 (en) Control information sending method and communications device
CN102017504B (zh) 具有捆绑窗口中的所指配数据分组的信令的电信系统中的方法和装置
US20160337110A1 (en) Resource management method and device and computer storage medium
US8514691B2 (en) Feedback information relating to a mobile communications system using carrier aggregation
CN102045144A (zh) 一种反馈ack/nack信息的方法及装置
KR20160039676A (ko) 업링크 제어 정보 송신 방법, 사용자 장비, 및 기지국
CN101699781A (zh) 正确/错误应答消息和秩指示信令的编码方法及装置
CN108075862A (zh) 一种物理上行共享信道上ack/nack检测的方法和装置
CN101867466B (zh) 应答消息的反馈方法及装置
JP2019146258A (ja) 制御情報を送信するための方法、ユーザ機器、及び基地局
CN103684710A (zh) 发送/接收harq消息的方法，基站和用户设备
US20180123745A1 (en) Wireless communication method, device and system

Legal Events

Date Code Title Description
AS Assignment

Owner name: HUAWEI TECHNOLOGIES CO., LTD., CHINA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BERGGREN, FREDRIK;LIU, JIANGHUA;SIGNING DATES FROM 20110720 TO 20110721;REEL/FRAME:026689/0631

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION