WO2018090571A1 - 确认/非确认信息的检测方法、装置及存储介质 - Google Patents

确认/非确认信息的检测方法、装置及存储介质 Download PDF

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Publication number
WO2018090571A1
WO2018090571A1 PCT/CN2017/082294 CN2017082294W WO2018090571A1 WO 2018090571 A1 WO2018090571 A1 WO 2018090571A1 CN 2017082294 W CN2017082294 W CN 2017082294W WO 2018090571 A1 WO2018090571 A1 WO 2018090571A1
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ack
information
bit
bit soft
soft information
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PCT/CN2017/082294
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English (en)
French (fr)
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赵宝
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深圳市中兴微电子技术有限公司
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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
    • H04L1/1607—Details of the supervisory signal
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03178—Arrangements involving sequence estimation techniques
    • H04L25/03312—Arrangements specific to the provision of output signals
    • H04L25/03318—Provision of soft decisions

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a storage medium for detecting Acknowledgement/Negative Acknowledgement (ACK/NACK) information on a Physical Uplink Shared Channel (PUSCH).
  • ACK/NACK Acknowledgement/Negative Acknowledgement
  • PUSCH Physical Uplink Shared Channel
  • the terminal receives the service data sent by the base station, and needs to acknowledge the data and feed back to the base station.
  • the ACK/NACK feedback information is transmitted on the PUSCH, it can be multiplexed with the service data or separately.
  • the multiplexing of the ACK/NACK feedback information is implemented by puncturing the service data, and the base station receives the PUSCH information sent by the terminal, and demultiplexes the information.
  • the ACK/NACK bit is decoded by the ACK/NACK decoder. If an ACK is received, it indicates that the codeword is correctly received, and new codeword data can be sent. If a NACK is received, it indicates that the codeword receives an error and needs to be retransmitted.
  • the PUSCH carries the ACK/NACK feedback information corresponding to the Physical Downlink Shared Channel (PDSCH), for example, the PDSCH is sent in the subframe n.
  • the uplink grant information (UL grant) is also sent. If the terminal receives both the PDSCH and the UL grant, the terminal sends the PUSCH in the subframe n+4, and carries the ACK/NACK feedback information corresponding to the PDSCH through multiplexing. .
  • the terminal only receives the UL grant and does not receive the PDSCH, so the terminal will only send the PUSCH, and does not carry the ACK/NACK feedback information.
  • the base station does not know whether ACK/NACK information is multiplexed in the PUSCH. It is assumed that the terminal does not multiplex ACK/NACK information on the PUSCH, and only transmits the service data, which is called Discontinuous Transmission (DTX). However, the receiving end of the base station considers that the ACK/NACK information is received. It is a wrong inspection; wrong inspection may lead to errors.
  • DTX Discontinuous Transmission
  • the embodiment of the present invention is to provide a method, a device, and a storage medium for detecting ACK/NACK information on a PUSCH, which can simplify the selection of threshold values and ensure the probability of missed detection and error detection of ACK/NACK. .
  • An embodiment of the present invention provides a method for detecting ACK/NACK information on a PUSCH, including:
  • the detection value of the ACK/NACK information is obtained according to a sum of a square of all bit sums in the bit soft information and a square of all bits in the bit soft information, where the ACK/NACK information is: At 1 bit, a ratio of a square of all bit sums in the bit soft information to a sum of squares of all bits in the bit soft information is calculated to obtain a detected value of the ACK/NACK information.
  • the method further includes: when the ACK/NACK information is 1 bit, grouping the bit soft information to obtain: the first bit soft Information sequence and second bit soft information sequence;
  • the square of all bit sums in the bit soft information sequence is: a square of all bit sums in the first bit soft information sequence and the second bit soft information sequence; all bits in the bit soft information sequence
  • the sum of squares is: the sum of the squares of all bits in the sequence of the first bit soft information sequence and the second bit soft information.
  • the bit soft information is modified, and the ACK/NACK information is detected according to a sum of squares of all bit sums in the modified bit soft information and squares of all bits in the bit soft information.
  • the value includes: when the ACK/NACK information is 2 bits, correcting the bit soft information, and calculating a ratio of a square of all bit sums in the modified bit soft information to a sum of squares of all bits in the bit soft information, The detected value of the ACK/NACK information is obtained.
  • the method further includes: when the ACK/NACK information is 2 bits, grouping the bit soft information to obtain: the third bit soft Information sequence, fourth bit soft information sequence and fifth bit soft information sequence;
  • modifying the bit soft information includes: ordering the third bit soft information The column, the fourth bit soft information sequence and the fifth bit soft information sequence are decoded and mapped to obtain corresponding third correction value coefficients, fourth correction value coefficients and fifth correction value coefficients; for the third bit soft information All the bits in the sequence are summed, multiplied by the third correction value coefficient to obtain a third correction value, and all the bits in the fourth bit soft information sequence are summed and multiplied by the fourth correction value coefficient to obtain a fourth correction. a value, summing all the bits in the fifth bit soft information sequence and multiplying the fifth correction value coefficient to obtain a fifth correction value;
  • a square of all bit sums in the corrected bit soft information is: a square of a sum of the third correction value, the fourth correction value, and the fifth correction value; the bit soft information
  • the sum of the squares of all the bits in the sum is: the sum of the squares of all bits in the third bit soft information sequence, the fourth bit soft information sequence, and the fifth bit soft information sequence.
  • the method further includes: when the detection value of the ACK/NACK information is less than or equal to a preset threshold, determining that there is no ACK on the PUSCH. /NACK information.
  • An embodiment of the present invention further provides an apparatus for detecting ACK/NACK information on a PUSCH, including: an obtaining module, a calculating module, and a determining module;
  • a calculation module configured to obtain a detection value of the ACK/NACK information according to a sum of a square of all bit sums in the bit soft information and a square of all bits in the bit soft information; or, configured to be soft to the bit Correcting the information, and obtaining a detected value of the ACK/NACK information according to a sum of squares of all bit sums in the modified bit soft information and squares of all bits in the bit soft information;
  • a determining module configured to determine that ACK/NACK information exists on the PUSCH when the detected value of the ACK/NACK information is greater than a preset threshold.
  • the calculating module is further configured to calculate, when the ACK/NACK information is 1 bit, calculate a ratio of a square of all bit sums in the bit soft information to all ratios in the bit soft information. The ratio of the sum of the squares gives the detected value of the ACK/NACK information.
  • the calculating module is further configured to: when the ACK/NACK information is 2 bits, correct the bit soft information, calculate a square of all bit sums in the modified bit soft information, and calculate the bit soft The ratio of the sum of the squares of all the bits in the information gives the detected value of the ACK/NACK information.
  • the determining module is further configured to determine that the ACK/NACK information does not exist on the PUSCH when the detected value of the ACK/NACK information is less than or equal to a preset threshold.
  • the embodiment of the present invention further provides a computer storage medium, wherein the computer storage medium stores a computer program configured to perform the method for detecting ACK/NACK information on the PUSCH according to the embodiment of the present invention.
  • the method, device, and storage medium for detecting ACK/NACK information on a PUSCH obtain bit soft information corresponding to ACK/NACK information on a PUSCH; and according to the square of all bit sums in the bit soft information, the bit a sum of squares of all bits in the soft information, to obtain a detected value of the ACK/NACK information; or, to modify the bit soft information, according to the square of all bit sums in the modified bit soft information and the bit soft information The sum of the squares of all the bits is obtained, and the detected value of the ACK/NACK information is obtained.
  • the detected value of the ACK/NACK information is greater than a preset threshold, it is determined that the ACK/NACK information exists on the PUSCH. In this way, the selection of the threshold value can be simplified, and the probability of missed detection and the probability of misdetection of the ACK/NACK information can be guaranteed.
  • FIG. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of an ACK/NACK multiplexing manner on a PUSCH under a normal cyclic prefix according to an embodiment of the present invention
  • FIG. 3 is a flowchart 1 of a method for detecting ACK/NACK information on a PUSCH according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of an ACK/NACK information detecting structure according to an embodiment of the present invention.
  • FIG. 5 is a second flowchart of a method for detecting ACK/NACK information on a PUSCH according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of a device for detecting ACK/NACK information on a PUSCH according to an embodiment of the present invention.
  • the 3GPP LTE project is an improvement project for Universal Terrestrial Radio Access (UTRA) and UTRAN, and is a technological evolution of the entire network including the core network.
  • UTRA Universal Terrestrial Radio Access
  • the multiple access mode in LTE is Orthogonal Frequency Division Multiple Access (OFDMA), and the uplink multiple access mode is based on Orthogonal Frequency Division Multiplexing (OFDM) transmission technology.
  • OFDM Orthogonal Frequency Division Multiplexing
  • SC-FDMA Single-carrier Frequency-Division Multiple Access
  • HARQ Hybrid Automatic Repeat Request
  • FEC Forward Error Correction
  • ARQ Automatic Repeat ReQuest
  • CRC Cyclic Redundancy Check
  • the terminal needs to confirm the ACK reception feedback, otherwise the terminal performs non-acknowledgment NACK reception feedback.
  • the base station receives this feedback, it can judge whether retransmission is needed according to ACK/NACK, and such a mechanism improves the channel throughput rate.
  • HARQ technology can well compensate the impact of time-varying and multipath fading on signal transmission in wireless mobile channels, and has become one of the key technologies in the future 3G long-term evolution system. This technology will continue to improve with the development of 3G long-term evolution system.
  • the terminal receives the service data sent by the base station, and needs to acknowledge the data and feed back to the base station.
  • the ACK/NACK feedback information is transmitted on the PUSCH, it can be multiplexed with the service data or separately.
  • the terminal first performs a CRC check on the received codeword to determine a feedback bit sequence, and the ACK/NACK feedback information has different coding modes according to the number of bits, as described in section 5.2.2.6 of the 36.212 protocol.
  • the encoded feedback information is generated by cyclically repeating the connection to generate a final transmitted bit sequence, which is then multiplexed and transmitted on the PUSCH.
  • the multiplexing of ACK/NACK feedback information is achieved by puncturing service data, that is, replacing the service data of a specific location with ACK/NACK information according to the method described in section 5.2.2.8 of the 36.212 protocol.
  • the base station receives the PUSCH information sent by the terminal, demultiplexes and decodes the ACK/NACK bit by the ACK/NACK decoder. If an ACK is received, it indicates that the codeword is accepted correctly, and new codeword data can be sent. If a NACK is received, it indicates that the codeword receives an error and needs to be retransmitted.
  • This multiplexing method increases the throughput and brings a problem: the PUSCH carries the ACK/NACK feedback information corresponding to the PDSCH. For example, when the PDSCH is sent in the subframe n, the uplink grant information is also sent.
  • the terminal After receiving the PDSCH and receiving the UL grant, the terminal transmits the PUSCH in the subframe n+4, and carries the ACK/NACK feedback information corresponding to the PDSCH by multiplexing. However, it is possible that the terminal only received the UL grant and did not receive it. To the PDSCH, the terminal will only send PUSCH, which does not carry ACK/NACK feedback information. In this way, the base station does not know whether ACK/NACK information is multiplexed in the PUSCH. It is assumed that the terminal does not multiplex ACK/NACK information on the PUSCH and only transmits the service data, but the receiving end of the base station thinks that the ACK/NACK information is received.
  • This error is called error detection; otherwise, when the terminal sends on the PUSCH.
  • the ACK/NACK information which is not detected by the base station receiving end, is called missed detection. Missing tests will not cause errors, and misdetections may cause errors. For example, in the case of a missed detection, the base station considers that the terminal does not receive the data on the PDSCH and performs retransmission. The retransmission does not cause an error but reduces the throughput. When the error is detected, the terminal does not receive the data information on the PDSCH, and does not generate the ACK/NACK information for the data.
  • the base station obtains the ACK/NACK information that does not exist from the PUSCH, and obtains the NACK information if decoded. At this time, the original codeword will still be retransmitted, and no serious error will occur. However, when the ACK information is obtained by decoding, the base station considers that the original codeword is received correctly and transmits the next new codeword. In fact, the codeword It is not received by the terminal, which will result in the loss of codeword data.
  • the threshold-based detection method when the maximum likelihood value or the correlation value is less than the threshold, it is considered that no ACK/NACK information is transmitted, otherwise the ACK/NACK information is considered to be transmitted.
  • the selection of the threshold value requires higher accuracy, so as to ensure the probability of missed detection of ACK/NACK information and the probability of error, while meeting the performance requirements, that is, It is difficult to determine an appropriate threshold in a changing channel environment.
  • FIG. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present invention.
  • a base station receives data from a terminal. If the terminal detects the data on the PDSCH, the data is verified. And give feedback. The ACK/NACK feedback information is multiplexed with the data on the PUSCH and transmitted to the base station. If the terminal does not detect data on the PDSCH, the PUSCH transmits only data, and no ACK/NACK information is multiplexed.
  • the ACK/NACK information is used to indicate retransmission of the codeword, the ACK indicates that the received data does not need to be retransmitted correctly, the NACK indicates that the received data is incorrectly requested to be retransmitted, and the DTX indicates that the data information retransmission request is not detected.
  • the original codeword is retransmitted when the base station receives the NACK and DTX information, but the redundancy version number of the NACK and DTX retransmission request is not necessarily the same. Therefore, the base station receiving end needs to clarify whether there is ACK/NACK information (ie, whether it is DTX), and correctly decode the ACK/NACK information.
  • the embodiment of the present invention proposes a new detection method for detecting whether ACK/NACK information exists in the receiving end of the base station, and the method can reduce the influence of interference factors such as noise on the ACK/NACK detection performance.
  • FIG. 2 is a schematic diagram of an ACK/NACK multiplexing mode on a PUSCH under a normal cyclic prefix according to an embodiment of the present invention.
  • an ACK/NACK is complexed on a PUSCH and a data under a normal cyclic prefix (Cyclic Prefix, CP).
  • the method is: ACK/NACK information is multiplexed by puncturing data information, that is, when ACK/NACK information is transmitted, the service data information of the multiplexed location resource in FIG. 2 is replaced by ACK/NACK information; Without ACK/NACK information, only service data is transmitted.
  • ACK/NACK information is multiplexed by puncturing data information, that is, when ACK/NACK information is transmitted, the service data information of the multiplexed location resource in FIG. 2 is replaced by ACK/NACK information; Without ACK/NACK information, only service data is transmitted.
  • 5.2.2.8 of the 36.212 protocol in 3GPP it can be seen from
  • the ACK/NACK information is distributed on both sides of the Demodulation Reference Signal (DMRS), so that ACK/NACK can be guaranteed.
  • the parameters such as channel estimation of the information location are more correct, so that the ACK/NACK information is better decoded.
  • FIG. 3 is a flowchart of a first embodiment of a method for detecting ACK/NACK information on a PUSCH according to the present invention. As shown in FIG. 3, the method includes:
  • Step 300 Obtain bit soft information corresponding to ACK/NACK information on the PUSCH.
  • the HARQ-ACK coding modes when the ACK/NACK information is 1 bit and 2 bits are as shown in Table 1 and Table 2, respectively:
  • Table 1 Encoding mode when ACK/NACK information is 1 bit:
  • x and y are placeholders for scrambling the HARQ-ACK bits. It has no practical meaning. After the y placeholder is scrambled, the new one is obtained. In the bit sequence, y is Repeat.
  • x is a placeholder for scrambling the HARQ-ACK bit to maximize the Euclidean distance of the modulation symbol carrying the HARQ-ACK information, which has no practical significance.
  • Q m represents the modulation order of ACK/NACK information
  • Q m takes values of 2, 4, and 6, that is, QPSK, 16QAM, and 64QAM modulation modes are respectively supported.
  • the transmission bit is repeatedly connected by the encoded bit cycle to obtain a reconstructed bit sequence.
  • obtaining the bit soft information sequence corresponding to the ACK/NACK information on the PUSCH may further include: acquiring modulation symbol data on the PUSCH, and demultiplexing and demapping the modulation symbol data on the PUSCH in turn.
  • the bit soft information corresponding to the acknowledgment/non-acknowledgment ACK/NACK information on the PUSCH is derived.
  • Demultiplexing in a multiplexing manner, and obtaining a symbol sequence s 1 , . . . , s Q′ , Q′ of ACK/NACK information is a symbol number;
  • the symbol sequence obtained by demultiplexing is the service data stored at the ACK/NACK information multiplexing location on the current PUSCH channel.
  • the symbol sequences s 1 , . . . , s Q′ are demapped according to the modulation and coding manner of the ACK/NACK information, and the corresponding bit soft information is obtained after the demapping:
  • the second bit soft information indicating the i-th symbol s i is not considered, and the soft information of other bits does not participate in the DTX detection operation.
  • the obtained bit soft information is grouped according to original bit positions, and when the ACK/NACK information is 1 bit, the bit soft information is grouped to obtain: a first bit soft information sequence and a second bit soft information. sequence.
  • the original information bits obtained are The number of ACK/NACK transmission symbols is Q'. Since only the first two bits of soft information participate in the operation in each symbol, the original information bits are demapped to obtain the bit soft information as:
  • the above bits are obtained by grouping the soft information sequences according to the original bit positions, and the original information bits are obtained.
  • the corresponding first bit soft information sequence is: o' 1 , o' 2 , ..., o' Q'
  • the second bit bit soft information sequence corresponding to y is: y' 1 , y ' 2 ,... , y' Q'
  • the length of the bit soft information sequence is Q'.
  • the bit soft information is grouped to obtain a third bit soft information sequence, a fourth bit soft information sequence, and a fifth bit soft information sequence.
  • the original information bits obtained are After de-mapping the original bit information, the soft information sequence is: o' 01 , o' 11 , o' 21 , o' 02 , o' 12 , o' 22 , ..., o' 0t1 , o' 1t2 , o ' 2t3 , where t1, t2, t3 represent the sequence length of the three-bit soft information, respectively.
  • the bit soft information is grouped according to the original bit position, and the original information bits are obtained.
  • the corresponding soft information sequences are: third bit soft information sequence o' 01 , o' 02 , ..., o' 0t1 , fourth bit soft information sequence o ' 11 , o ' 12 , ..., o' 1t2 , fifth bit soft information sequence o' 21 , o' 22 ,...,o' 2t3 .
  • the length of each bit soft information sequence may be different depending on the coding characteristics when the ACK/NACK information is 2 bits, but the length difference is only 1.
  • bit soft information when the ACK/NACK information is 2 bits and the number Q' is 4, the original information bits are demapped to obtain bit soft information: o' 01 , o ' 11 , o ' 21 , o ' 02 , o ' 12 , o' 22 , o' 03 , o' 13 , where 1 symbol can demap 2 bits of soft information.
  • Step 301 Obtain a detection value of the ACK/NACK information according to a sum of a square of all bits in the bit soft information and a square of all bits in the bit soft information; or, modify the bit soft information,
  • the detected value of the ACK/NACK information is obtained according to the sum of the square of all bit sums in the modified bit soft information and the square of all bits in the bit soft information.
  • At least two calculation methods are included in calculating the detection value of the ACK/NACK information:
  • Mode 1 When the ACK/NACK information bit is 1 bit, the square of all bit sums in the bit soft information sequence is: the square of all bit sums in the first bit soft information sequence and the second bit soft information sequence; all in the bit soft information sequence The sum of the squares of the bits is the sum of the squares of all bits in the sequence of the first bit soft information sequence and the second bit soft information sequence.
  • FIG. 4 is a schematic diagram of an ACK/NACK information detecting structure according to an embodiment of the present invention, according to the first bit soft information sequence obtained in FIG. 4 and step 300: o′ 1 , o′ 2 , . . . , o′ Q′ ,
  • the second bit soft information sequence corresponding to y: y' 1 , y′ 2 , . . . , y′ Q′ calculates the detected value R of the ACK/NACK information, and the calculation formula is as follows:
  • T 1 is a threshold value of ACK/NACK detection when the ACK/NACK information is 1 bit, and the threshold is determined according to the actual PUSCH channel quality, that is, when the ACK/NACK information is 1 bit, the T in FIG. 4 For T 1 .
  • Mode 2 When the ACK/NACK information is 2 bits, the bit soft information needs to be corrected first, and then the ratio of the square of all bit sums in the modified bit soft information to the sum of the squares of all bits in the bit soft information is calculated. And obtaining the detected value of the ACK/NACK information.
  • the modifying the bit soft information may be: decoding and mapping the third bit soft information sequence, the fourth bit soft information sequence, and the fifth bit soft information sequence to obtain a corresponding third correction value coefficient. And a fourth correction value coefficient and a fifth correction value coefficient; summing all the bits in the third bit soft information sequence and multiplying the third correction value coefficient to obtain a third correction value, and the fourth bit is soft All the bits in the information sequence are summed and multiplied by the fourth correction value coefficient to obtain a fourth correction value, and all the bits in the fifth bit soft information sequence are summed and multiplied by the fifth correction value coefficient to obtain a fifth value. Correction value.
  • the square of the sum of the modified bit soft information is: a square of a sum of the third correction value, the fourth correction value, and the fifth correction value; all of the bit soft information
  • the sum of the bit squares is the sum of the squares of all bits in the third bit soft information sequence, the fourth bit soft information sequence, and the fifth bit soft information sequence.
  • the method for correcting bit soft information may include:
  • the corresponding soft information is input to the ACK/NACK decoder, and the sequence of [o' 0 o' 1 o' 2 ] is obtained after decoding.
  • the decoding method is as follows:
  • i is the number of each bit in the original information
  • j is the number corresponding to each soft information in one bit
  • the length of the t-bit soft information sequence is the number of each bit in the original information.
  • the sequence [o' 0 o' 1 o' 2 ] can be mapped to
  • the third correction coefficient, the fourth correction coefficient, and the fifth correction coefficient are respectively.
  • step 300 of FIG. 4 Obtained according to step 300 of FIG. 4 and the third bit soft information sequence o '01, o' 02, ..., o '0t1, the fourth bit soft information sequence o' 11, o '12, ..., o ' 1t2 , fifth bit soft information sequence o' 21 , o' 22 , ..., o' 2t3 , and the above correction factor.
  • the detection value R of the ACK/NACK information is calculated, and the calculation formula is as follows:
  • T 2 is a threshold value of ACK/NACK detection when the ACK/NACK information is 2 bits, and the threshold is determined according to the actual PUSCH channel quality. That is, when the ACK/NACK information is 2 bits, T in FIG. 4 is T 2 .
  • Step 302 When the detected value of the ACK/NACK information is greater than a preset threshold, determine that ACK/NACK information exists on the PUSCH.
  • the detected value of the ACK/NACK information is less than or equal to a preset threshold, and ACK/NACK information does not exist on the PUSCH, that is, DTX occurs.
  • the soft bit information obtained by symbol demodulation at the ACK/NACK information position of the receiving end has certain characteristics.
  • the ACK/NACK information is 1 bit
  • the first two soft bit information obtained by the symbol demodulation at these positions is positive and negative
  • the squared value A of the bit sum will approach a larger number.
  • the ACK/NACK information is 2 bits
  • the three-bit soft information obtained by the symbol demodulation at these positions is respectively summed, and after multiplying the correction value of the estimated bit, the positive and negative of each bit of soft information will also be identical, and their bits are also the same.
  • the squared value A of the sum will also approach a larger number.
  • the location where the ACK/NACK information is supposed to be occupied is the service data.
  • the traffic data bits at these locations exhibit randomness, that is, the bit soft information obtained by demodulating the symbols at these locations has positive and negative randomness, and then their bit sums of squares A will approach. A smaller number.
  • the detected value R 1 obtained when the ACK/NACK information is multiplexed on the PUSCH is not multiplexed with the ACK/NACK information on the PUSCH.
  • a detected value obtained when R 2 has the quite different multiples which selection threshold T to a lot of space reserved to counter the effects of noise and fading caused, such as the threshold value T is not in the noise factor.
  • the fast and accurate change can also effectively detect the existence of ACK/NACK information, and ensure the probability of missed detection and the probability of misdetection of ACK/NACK information.
  • the ACK/NACK detection method provided by the embodiment of the present invention fully utilizes the randomness of the service data bits at the ACK/NACK information bit multiplexing position to implement ACK/NACK detection, and when the transmission symbol Q' is larger, the method should be The more the number of ACK/NACK information bits is sent, the more random the randomness is, and the better the detection performance is.
  • bit soft information corresponding to ACK/NACK information on the PUSCH is obtained; and the ACK/NACK is obtained according to a sum of squares of all bit sums in the bit soft information and squares of all bits in the bit soft information.
  • the detected value of the information; or, the bit soft information is modified, and the ACK/NACK information is obtained according to the sum of the squares of all bits in the modified bit soft information and the square of all the bits in the bit soft information.
  • detecting when the detected value of the ACK/NACK information is greater than a preset threshold, determining that ACK/NACK information exists on the PUSCH. In this way, the selection of the threshold value can be simplified, and the probability of missed detection and the probability of error detection of the ACK/NACK information can be guaranteed.
  • FIG. 5 is a flowchart of a second embodiment of a method for detecting ACK/NACK information on a PUSCH according to an embodiment of the present disclosure, where the method includes:
  • Step 500 Process data on the PUSCH to obtain modulation symbol data.
  • the terminal after receiving the service data sent by the base station, the terminal needs to acknowledge the data and feed back the data to the base station.
  • the ACK/NACK feedback information can be multiplexed with the service data and sent to the base station through the PUSCH, and the base station receives the data. After that, a series of processing is performed on the data on the PUSCH, including channel estimation, noise estimation, frequency offset estimation compensation, and equalization.
  • the data on the PUSCH can be converted to modulation symbol data after processing.
  • Step 501 Demultiplex the modulation symbol data to obtain an ACK/NACK symbol sequence.
  • Step 502 De-mapping the symbol sequence of the ACK/NACK information according to the corresponding modulation mode, to obtain corresponding bit soft information.
  • the symbol sequence s 1 , . . . , s Q′ of the obtained ACK/NACK information is demapped to obtain corresponding bit soft information:
  • Q m represents the modulation order.
  • Step 503 Group the bit soft information according to the original bit position.
  • the soft information sequence is grouped, and the bit soft information sequence is: o' 1 , o' 2 , ..., o' Q' , y ' 1 , y ' 2 ,...,y' Q' .
  • the soft information sequence is obtained by grouping, and the bit soft information sequence is: o' 01 , o ' 02 , ..., o' 0t1 , o' 11 , o' 12 ,... , o' 1t2 , o' 21 , o' 22 , ..., o' 2t3 .
  • Step 504 Calculate the detected value of the ACK/NACK information, and determine whether there is ACK/NACK information.
  • the calculation of the detected value of the ACK/NACK information includes the following two methods:
  • Mode 1 In the ideal case, when the ACK/NACK information is 1 bit, the original information bits are utilized. The corresponding bit soft information is used for ACK/NACK information detection.
  • the second bit soft information sequence y' 1 , y′ 2 ,..., y′ Q′ corresponding to y
  • the calculation formula of the ACK/NACK information detection value may be:
  • the original information bits The corresponding soft information is: o' 01 , o ' 02 , o ' 03 , o ' 04 , o ' 11 , o ' 12 , o ' 13 , o ' 14 , o ' 21 , o ' 22 , o ' 23 , o' 24 , at this time, the sequence length of the three-bit soft information is 4.
  • the calculation formula of the ACK/NACK information detection value may be:
  • the detected value is the
  • the flag bit DTX_flag of the ACK/NACK information detection is set by the comparison result of the detected value of the ACK/NACK information and the threshold value.
  • the detection value R is proportional to the number of symbols Q'. For example, if the ACK/NACK information is present, the detection value is R 1 , and when there is no ACK/NACK information, the detection value is R 2 .
  • the ACK / NACK information is 2bit 1bit when the detected value and the theoretical value of 18 for both R 1; B value substantially unchanged If there ACK / NACK information, A value Since the service data bits exhibit strong randomness to maintain the value in a small range, the detected value R 2 is also small. At this time, the detected value R 2 will be much smaller than the detected value R 1 .
  • T R 2 ⁇ T ⁇ R 1
  • the ACK/NACK detection method provided in the embodiment of the present invention greatly increases the ACK/NACK detection value R used for threshold comparison, so that the selection of the threshold T is not accurate even if the PUSCH channel quality changes rapidly, and the threshold T is not lowered.
  • the ACK/NACK detection method provided in the embodiment of the present invention enhances the detection performance of the ACK/NACK and improves the anti-interference performance.
  • the embodiment of the present invention further provides a device for detecting ACK/NACK information on a PUSCH
  • FIG. 6 is a schematic structural diagram of a device for detecting an ACK/NACK information on a PUSCH according to an embodiment of the present invention.
  • the device includes: an obtaining module 600, a calculating module 601, and a determining module 602; wherein
  • the obtaining module 600 is configured to obtain bit soft information corresponding to the ACK/NACK information on the PUSCH.
  • the calculating module 601 is configured to obtain a detection value of the ACK/NACK information according to the sum of the squares of all bits in the bit soft information and the squares of all bits in the bit soft information; or, configured to correct the bit soft information, according to the correction Square-to-bit ratio of all bit sums in bit soft information The sum of the squares of all bits in the special soft information, and the detected value of the ACK/NACK information is obtained.
  • the determining module 602 is configured to determine that ACK/NACK information exists on the PUSCH when the detected value of the ACK/NACK information is greater than a preset threshold. .
  • the calculating module 601 is further configured to calculate, when the ACK/NACK information is 1 bit, a ratio of a square of all bits in the bit soft information to a sum of squares of all bits in the bit soft information, to obtain a detected value of the ACK/NACK information.
  • the calculating module 601 is further configured to group the bit soft information to obtain: a first bit soft information sequence and a second bit soft information sequence; correspondingly, a square of all bit sums in the bit soft information sequence is : the sum of all bit sums in the first bit soft information sequence and the second bit soft information sequence; the sum of squares of all bits in the bit soft information sequence is: the first bit soft information sequence and the second bit soft information sequence all bits in the sequence The sum of squares.
  • the calculating module 601 is further configured to: when the ACK/NACK information is 2 bits, correct the bit soft information, and calculate a ratio of the sum of the squares of all bits in the modified bit soft information to the sum of the squares of all the bits in the bit soft information, The detected value of the ACK/NACK information.
  • the calculating module 601 is further configured to group the bit soft information to obtain: a third bit soft information sequence, a fourth bit soft information sequence, and a fifth bit soft information sequence;
  • modifying the bit soft information comprises: decoding and mapping the third bit soft information sequence, the fourth bit soft information sequence and the fifth bit soft information sequence to obtain a corresponding third correction value coefficient and a fourth correction a value coefficient and a fifth correction value coefficient; summing all the bits in the third bit soft information sequence and multiplying the third correction value coefficient to obtain a third correction value, summing all the bits in the fourth bit soft information sequence, multiplying by The fourth correction value coefficient obtains a fourth correction value, and all the bits in the fifth bit soft information sequence are summed and multiplied by the fifth correction value coefficient to obtain a fifth correction value;
  • the square of all bits in the modified bit soft information is: the sum of the sum of the third correction value, the fourth correction value, and the fifth correction value; the sum of the squares of all bits in the bit soft information is: third Bit soft information sequence, fourth bit soft information sequence and fifth bit soft information sequence The sum of the squares of all the bits.
  • the determining module 602 is further configured to determine that the ACK/NACK information does not exist on the PUSCH when the detected value of the ACK/NACK information is less than or equal to a preset threshold.
  • the obtaining module 600, the calculating module 601, and the determining module 602 may each be a Central Processing Unit (CPU), a Micro Processor Unit (MPU), and a digital signal processor located in the terminal device. Digital Signal Processor (DSP), or Field Programmable Gate Array (FPGA) implementation.
  • CPU Central Processing Unit
  • MPU Micro Processor Unit
  • DSP Digital Signal Processor
  • FPGA Field Programmable Gate Array
  • the method for detecting the ACK/NACK information is implemented in the form of a software function module and is sold or used as a separate product, it may also be stored in a computer readable storage medium.
  • the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium, including a plurality of instructions.
  • a computer device (which may be a personal computer, server, or network device, etc.) is caused to perform all or part of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read only memory (ROM), a magnetic disk, or an optical disk.
  • program codes such as a USB flash drive, a mobile hard disk, a read only memory (ROM), a magnetic disk, or an optical disk.
  • the embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores a computer program, and the computer program is used to execute the foregoing method for detecting ACK/NACK information in the embodiment of the present invention.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
  • the embodiment of the present invention obtains bit soft information corresponding to ACK/NACK information on the PUSCH; and obtains the ACK/NACK information according to a sum of squares of all bit sums in the bit soft information and squares of all bits in the bit soft information. Detecting the value; or modifying the bit soft information, and obtaining the detected value of the ACK/NACK information according to the sum of the square of all bits in the modified bit soft information and the square of all the bits in the bit soft information. ; the ACK/NACK When the detected value of the information is greater than a preset threshold, it is determined that ACK/NACK information exists on the PUSCH. In this way, the selection of the threshold value can be simplified, and the probability of missed detection and the probability of misdetection of the ACK/NACK information can be guaranteed.

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Abstract

本发明公开了一种确认/非确认(ACK/NACK)信息的检测方法，所述方法包括：获得物理上行共享信道(PUSCH)上ACK/NACK信息对应的比特软信息；根据所述比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和，得到所述ACK/NACK信息的检测值；或者，对所述比特软信息进行修正，根据修正后的比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和，得到所述ACK/NACK信息的检测值；所述ACK/NACK信息的检测值大于预设的门限值时，确定所述PUSCH上存在ACK/NACK信息。本发明实施例还公开了一种ACK/NACK信息的检测装置及存储介质。

Description

确认/非确认信息的检测方法、装置及存储介质
相关申请的交叉引用
本申请基于申请号为201611008292.9、申请日为2016年11月16日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本发明涉及通信技术领域，尤其涉及一种物理上行共享信道(Physical Uplink Shared Channel，PUSCH)上确认/非确认(Acknowledgement/Negative Acknowledgement，ACK/NACK)信息的检测方法、装置及存储介质。
背景技术
在长期演进(Long Term Evolution，LTE)系统中，终端接收到基站发来的业务数据，需要对这些数据进行确认并反馈给基站端。ACK/NACK反馈信息在PUSCH上传输时，既可以与业务数据复用也可以单独传输。
当ACK/NACK反馈信息通过与PUSCH数据复用的方式在PUSCH上传输时，ACK/NACK反馈信息的复用是通过对业务数据打孔实现的，基站接收到终端发送的PUSCH信息，解复用后经ACK/NACK译码器译码得到ACK/NACK比特。若收到ACK表示该码字接收正确可以发送新的码字数据，若接收到NACK表示该码字接收错误需要重发。这种复用方式提高吞吐率的同时会带来一个问题：PUSCH上携带的是物理下行共享信道(Physical Downlink Shared Channel，PDSCH)对应的ACK/NACK反馈信息，比如在子帧n发了PDSCH的同时也发了上行授权信息(UL grant)，如果终端既接收到了PDSCH又接收到了UL grant，终端会在子帧n+4发送PUSCH，并把PDSCH对应的ACK/NACK反馈信息通过复用携带上。但是， 有可能终端只收到了UL grant而没有收到PDSCH，从而终端会只发PUSCH，其中不携带ACK/NACK反馈信息。这样基站并不知道PUSCH里是否复用了ACK/NACK信息。假设终端在PUSCH上并未复用ACK/NACK信息，只发送了业务数据，称之为不连续发送(Discontinuous Transmission，DTX)，但是基站接收端却认为接收到了ACK/NACK信息，这种错误称之为错检；错检可能导致错误出现。
因此，在基站接收端不仅需要ACK/NACK译码器，还需要在译码之后增加一个ACK/NACK检测装置，以判断译码得到的ACK/NACK信息是否真实存在。而现存在基于门限的检测方法中，由于噪声和多径衰落对信号幅度的影响，使得门限值的选择需要较高的准确度，才能在保证ACK/NACK信息漏检概率和错将概率同时满足性能要求，也就是说要在不断变化的信道环境中确定合适的门限值是比较困难的。
发明内容
有鉴于此，本发明实施例期望提供一种PUSCH上ACK/NACK信息的检测方法、装置及存储介质，既能简化门限值的选择，又能保证ACK/NACK的漏检概率和错检概率。
本发明的技术方案是这样实现的：
本发明实施例提供了一种PUSCH上ACK/NACK信息的检测方法，包括：
获得PUSCH上ACK/NACK信息对应的比特软信息；
根据所述比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和，得到所述ACK/NACK信息的检测值；
或者，对所述比特软信息进行修正，根据修正后的比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和，得到所述ACK/NACK信息的检测值；
所述ACK/NACK信息的检测值大于预设的门限值时，确定所述PUSCH上存在ACK/NACK信息。
上述方案中，所述根据所述比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和，得到所述ACK/NACK信息的检测值包括：所述ACK/NACK信息为1bit时，计算所述比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和之比，得到所述ACK/NACK信息的检测值。
上述方案中，在获得PUSCH上ACK/NACK信息对应的比特软信息后，所述方法还包括：所述ACK/NACK信息为1bit时，对所述比特软信息进行分组，得到：第一比特软信息序列和第二比特软信息序列；
相应地，所述比特软信息序列中所有比特和的平方为：所述第一比特软信息序列和所述第二比特软信息序列中所有比特和的平方；所述比特软信息序列中所有比特平方的和为：所述第一比特软信息序列和所述第二比特软信息需序列中所有比特平方的和。
上述方案中，所述对所述比特软信息进行修正，根据修正后的比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和，得到所述ACK/NACK信息的检测值包括：所述ACK/NACK信息为2bit时，对所述比特软信息进行修正，计算修正后的比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和之比，得到所述ACK/NACK信息的检测值。
上述方案中，在获得PUSCH上ACK/NACK信息对应的比特软信息后，所述方法还包括：所述ACK/NACK信息为2bit时，对所述比特软信息进行分组，得到：第三比特软信息序列、第四比特软信息序列和第五比特软信息序列；
相应地，对所述比特软信息进行修正包括：对所述第三比特软信息序 列、第四比特软信息序列和第五比特软信息序列进行译码并映射，得到对应的第三修正值系数、第四修正值系数和第五修正值系数；对所述第三比特软信息序列中所有比特求和后乘以所述第三修正值系数得到第三修正值，对所述第四比特软信息序列中所有比特求和后乘以所述第四修正值系数得到第四修正值，对所述第五比特软信息序列中所有比特求和后乘以所述第五修正值系数得到第五修正值；
相应地，所述修正后的比特软信息中所有比特和的平方为：所述第三修正值、所述第四修正值、以及所述第五修正值的和的平方；所述比特软信息中所有比特平方的和为：所述第三比特软信息序列、所述第四比特软信息序列和所述第五比特软信息序列中所有比特平方的和。
上述方案中，在得到所述ACK/NACK信息的检测值之后，所述方法还包括：所述ACK/NACK信息的检测值小于等于预设的门限值时，确定所述PUSCH上不存在ACK/NACK信息。
本发明实施例还提供了一种PUSCH上ACK/NACK信息的检测装置，包括：获取模块、计算模块和确定模块；其中，
获取模块，配置为获得PUSCH上ACK/NACK信息对应的比特软信息；
计算模块，配置为根据所述比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和，得到所述ACK/NACK信息的检测值；或者，配置为对所述比特软信息进行修正，根据修正后的比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和，得到所述ACK/NACK信息的检测值；
确定模块，配置为在所述ACK/NACK信息的检测值大于预设的门限值时，确定所述PUSCH上存在ACK/NACK信息。
上述方案中，所述计算模块，还配置为在所述ACK/NACK信息为1bit时，计算所述比特软信息中所有比特和的平方与所述比特软信息中所有比 特平方的和之比，得到所述ACK/NACK信息的检测值。
上述方案中，所述计算模块，还配置为在所述ACK/NACK信息为2bit时，对所述比特软信息进行修正，计算修正后的比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和之比，得到所述ACK/NACK信息的检测值。
上述方案中，所述确定模块，还配置为在所述ACK/NACK信息的检测值小于等于预设的门限值时，确定所述PUSCH上不存在ACK/NACK信息。
本发明实施例还提供了一种计算机存储介质，所述计算机存储介质存储有计算机程序，该计算机程序配置为执行本发明实施例的上述PUSCH上ACK/NACK信息的检测方法。
本发明实施例提供的PUSCH上ACK/NACK信息的检测方法、装置及存储介质，获得PUSCH上ACK/NACK信息对应的比特软信息；根据所述比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和，得到所述ACK/NACK信息的检测值；或者，对所述比特软信息进行修正，根据修正后的比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和，得到所述ACK/NACK信息的检测值；所述ACK/NACK信息的检测值大于预设的门限值时，确定所述PUSCH上存在ACK/NACK信息。如此，既能简化门限值的选择，又能保证ACK/NACK信息的漏检概率和错检概率。
附图说明
图1为本发明实施例中无线通信系统的一个示意图；
图2为本发明实施例中正常循环前缀下PUSCH上ACK/NACK复用方式的示意图；
图3为本发明实施例中PUSCH上ACK/NACK信息的检测方法的流程图一；
图4为本发明实施例中ACK/NACK信息检测结构的示意图；
图5为本发明实施例中PUSCH上ACK/NACK信息的检测方法的流程图二；
图6为本发明实施例PUSCH上ACK/NACK信息的检测装置的组成结构示意图。
具体实施方式
发明人在研究过程中发现，为了适应未来移动通信系统高速率和高可靠性数据传输以及满足新型业务需求，第三代合作伙伴计划(3GPP，Third Generation Partnership Projects)在众多国内外大型运营商的提倡下于2004年将移动通信系统陆地无线接入网(Universal Mobile Telecommunications System Terrestrial Radio Access Network，UTRAN)的LTE计划正式批准立项。在2006年6月完成可行性报告，2007年6月完成主要规范。3GPP的LTE项目是关于通用陆地无线接入(Universal Terrestrial Radio Access，UTRA)和UTRAN改进的项目，是对包括核心网在内的全网的技术演进。在LTE中下行的多址方式为正交频分多址(Orthogonal Frequency Division Multiple Access，OFDMA)，上行的多址方式为基于正交频分复用(Orthogonal Frequency Division Multiplexing，OFDM)传输技术的单载波频分多址(Single-carrier Frequency-Division Multiple Access，SC-FDMA)方式。
在无线移动通信系统中，由于信道环境较差，传输数据会出现错误，通常采用差错控制技术确保物理链路中的服务质量。LTE系统采用了混合自动重传技术(Hybrid Automatic Repeat Request，HARQ)，这是一种前向纠错编码(Forward Error Correction，FEC)和自动重传请求(Automatic Repeat reQuest，ARQ)相结合而形成的技术。业务信息以码字为单位添加循环冗余校验(Cyclic Redundancy Check，CRC)并编码，在下行传输中基站通过 PDSCH向终端发送。终端接收到PDSCH的下行数据后，通过完整码字的CRC校验结果得知该码字是否正确接收。若CRC校验正确则终端需做出确认ACK接收反馈，否则终端进行非确认NACK接收反馈。当基站接收到此反馈时，就可根据ACK/NACK来判断是否需要重传，这样的机制使得信道的吞吐率得到了提高。HARQ技术能够很好地补偿无线移动信道时变和多径衰落对信号传输的影响，已经成为未来3G长期演进系统中不可或缺的关键技术之一。该技术将会随着3G长期演进系统的发展不断完善。
在LTE系统中，终端接收到基站发来的业务数据，需要对这些数据进行确认并反馈给基站端。ACK/NACK反馈信息在PUSCH上传输时，既可以与业务数据复用也可以单独传输。
下面主要讨论ACK/NACK反馈信息与PUSCH数据复用的情况。终端首先对收到的码字进行CRC校验确定反馈比特序列，ACK/NACK反馈信息根据比特数有不同的编码方式，如36.212协议中5.2.2.6节所描述。经过编码的反馈信息通过循环重复连接产生最终的发送比特序列，调制之后复用在PUSCH上发送。ACK/NACK反馈信息的复用是通过对业务数据打孔实现的，也就是说根据36.212协议中5.2.2.8节所描述方法对特定位置的业务数据用ACK/NACK信息替换，这样做的目的是保证接收端对业务数据能够正确解速率匹配。基站接收到终端发送的PUSCH信息，解复用后经ACK/NACK译码器译码得到ACK/NACK比特。若收到ACK表示该码字接受正确可以发送新的码字数据，若接收到NACK表示该码字接收错误需要重发。这种复用方式提高了吞吐率的同时会带来一个问题：PUSCH上携带的是PDSCH对应的ACK/NACK反馈信息，比如在子帧n发了PDSCH的同时也发了上行授权信息，如果终端既接收到了PDSCH又接收到了UL grant，终端会在子帧n+4发送PUSCH，并把PDSCH对应的ACK/NACK反馈信息通过复用携带上。但是，有可能终端只收到了UL grant而没有收 到PDSCH，从而终端会只发PUSCH，其中不携带ACK/NACK反馈信息。这样基站并不知道PUSCH里是否复用了ACK/NACK信息。假设终端在PUSCH上并未复用ACK/NACK信息，只发送了业务数据，但是基站接收端却认为接收到了ACK/NACK信息，这种错误称之为错检；反之，当终端在PUSCH上发送了ACK/NACK信息，基站接收端却没有检测到的情况称之为漏检。漏检时并不会引起错误的发生，错检可能导致错误出现。例如，漏检时，基站认为终端没有接收到PDSCH上的数据，会进行重传，重传并不会引发错误但会降低吞吐量。错检时，终端没有接收到PDSCH上的数据信息，也没有生成对数据的ACK/NACK信息，但是由于错检，基站从PUSCH获得了并不存在的ACK/NACK信息，若译码得到NACK信息，此时原码字还是会重发，并不会出现严重错误，但是当译码得到的是ACK信息时，基站认为原码字接收正确并发送下一个新的码字，事实上该码字并没有被终端接收到，这样就会导致码字数据的丢失。
因此，在基站接收端不仅需要ACK/NACK译码器，还需要在译码之后增加一个ACK/NACK检测装置，以判断译码得到的ACK/NACK信息是否真实存在。现存在基于门限的检测方法中，在最大似然值或相关值小于门限时，认为无ACK/NACK信息发送，否则认为发送了ACK/NACK信息。但是由于噪声和多径衰落对信号幅度的影响，使得门限值的选择需要较高的准确度，才能在保证ACK/NACK信息漏检概率和错将概率同时满足性能要求，也就是说要在不断变化的信道环境中确定合适的门限值是比较困难的。
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
图1为本发明实施例中无线通信系统的一个示意图，如图1所示，基站从终端接收数据。终端若检测到PDSCH上的数据，则对该数据进行校验 并作出反馈。ACK/NACK反馈信息在PUSCH上和数据复用在一起发送给基站。若终端没有检测到PDSCH上的数据，则PUSCH仅发送数据，没有ACK/NACK信息复用。ACK/NACK信息用于指示码字重传，ACK表示接收的数据正确不需要重传，NACK表示接收的数据错误请求重传，DTX表示没有检测到数据信息重传请求。在基站接收到NACK和DTX信息的情况下原码字都会重传，但是NACK与DTX重传请求的冗余版本号并不一定相同。因此，在基站接收端需要明确是否存在ACK/NACK信息(即是否为DTX)，以及正确译码ACK/NACK信息。本发明实施例针对基站接收端检测是否存在ACK/NACK信息提出了一种新的检测方法，该方法可以降低噪声等干扰因素对ACK/NACK检测性能的影响。
图2为本发明实施例中正常循环前缀下PUSCH上ACK/NACK复用方式的示意图，如图2所示，在正常循环前缀(Cyclic Prefix，CP)下ACK/NACK在PUSCH上与数据的复用方式为：ACK/NACK信息通过打孔数据信息来进行复用，也就是说，当有ACK/NACK信息发送时，图2中复用位置资源的业务数据信息用ACK/NACK信息替换；若无ACK/NACK信息，则只发送业务数据。依据3GPP中36.212协议中5.2.2.8节要求，从图2的资源映射图中可以看出ACK/NACK信息分布在解调参考信号(Demodulation reference signal，DMRS)的两侧，这样可以保证ACK/NACK信息位置的信道估计等参数更加正确，从而更好地译码ACK/NACK信息。
第一实施例
图3为本发明PUSCH上ACK/NACK信息检测方法的第一实施例的流程图，如图3所示，该方法包括：
步骤300：获得PUSCH上ACK/NACK信息对应的比特软信息。
在实际实施时，ACK/NACK信息为1bit和2bit时的HARQ-ACK编码方式分别如表1和表2所示：
表1 ACK/NACK信息为1bit时编码方式：
Figure PCTCN2017082294-appb-000001
表1
其中，
Figure PCTCN2017082294-appb-000002
为ACK/NACK信息比特，“x”和“y”为占位符，用来对HARQ-ACK比特进行加扰，不具有实际意义，对y占位符进行加扰处理后，得到的新的比特序列中y是
Figure PCTCN2017082294-appb-000003
的重复。
表2 ACK/NACK信息为2bit时编码方式：
Figure PCTCN2017082294-appb-000004
表2
其中，
Figure PCTCN2017082294-appb-000005
为ACK/NACK信息比特，
Figure PCTCN2017082294-appb-000006
“x”为占位符，用来对HARQ-ACK比特进行加扰，以使承载HARQ-ACK信息的调制符号的欧式距离达到最大，不具有实际意义。
表1和表2中，Qm表示ACK/NACK信息调制阶数，Qm取值为2、4、6，即分别支持QPSK、16QAM、64QAM调制方式。
这里，可以将ACK/NACK发送比特数表示为QACK，QACK＝Q′×Qm，其中，Q′表示ACK/NACK信息的符号数，由ACK/NACK信息的比特数、PUSCH信道上传输块所占用的带宽等因素决定。
在得到ACK/NACK发送比特后，将发送比特通过编码后比特循环重复连接，得到重构比特序列。
本实际应用中，获得PUSCH上ACK/NACK信息对应的比特软信息序列，还可以包括：获取PUSCH上的调制符号数据，对所述PUSCH上的调制符号数据依次进行解复用、解映射，得出PUSCH上确认/非确认ACK/NACK信息对应的比特软信息。
示例性的，如果PUSCH信道上存在ACK/NACK信息复用，依据图2所示
复用方式解复用，得到ACK/NACK信息的符号序列s1,...,sQ′，Q′为符号个数；
如果PUSCH信道上不存在ACK/NACK信息复用，则通过解复用得到的符号序列为当前PUSCH信道上ACK/NACK信息复用位置处保存的业务数据。
在一实施例中，依据ACK/NACK信息的调制编码方式对符号序列s1,...,sQ′解映射，解映射后得到对应的比特软信息为：
Figure PCTCN2017082294-appb-000007
需要说明的是，对ACK/NACK信息的符号序列解映射时，无论ACK/NACK信息采用何种调制方式，进行ACK/NACK信息检测时(即DTX检测)只需要每个符号的前两比特软信息参与计算。因此，无论ACK/NACK信息采用何种调制方式，都可以使用下面的解映射方法进行解映射处理，每个ACK/NACK符号的解映射公式可以表示为：
Figure PCTCN2017082294-appb-000008
Figure PCTCN2017082294-appb-000009
可以理解的是，通过上述解映射公式可以得到最终需要的比特软信息 为：
Figure PCTCN2017082294-appb-000010
其中
Figure PCTCN2017082294-appb-000011
表示第i个符号si的第一比特软信息，
Figure PCTCN2017082294-appb-000012
表示第i个符号si的第二比特软信息，其他比特的软信息不参与DTX检测运算故不作考虑。
在一实施例中，将得到的比特软信息按照原始比特位置进行分组，ACK/NACK信息为1bit时，将所述比特软信息进行分组，得到：第一比特软信息序列和第二比特软信息序列。
示例性的，当ACK/NACK信息为1bit时，依据表1中调制阶数为2时的编码方式，得到的原始信息比特为
Figure PCTCN2017082294-appb-000013
ACK/NACK发送符号数为Q′。由于每一个符号中只有前两个比特软信息参与运算，因此，将原始信息比特解映射后得到比特软信息为：
o′1,y′1,o′2,y′2,...,o′Q′,y′Q′。
将上述比特将软信息序列按照原始比特位置进行分组得到，原始信息比特
Figure PCTCN2017082294-appb-000014
对应的第一比特软信息序列为：o′1,o′2,...,o′Q′，y对应的第二比特比特软信息序列为：y′1,y′2,...,y′Q′，比特软信息序列的长度均为Q′。
ACK/NACK信息为2bit时，将所述比特软信息进行分组，得到：第三比特软信息序列、第四比特软信息序列和第五比特软信息序列。
当ACK/NACK信息比特为2bit时，依据表2中调制阶数为2时的编码方式，得到的原始信息比特为
Figure PCTCN2017082294-appb-000015
对原始比特信息解映射后得到软信息序列为：o′01,o′11,o′21,o′02,o′12,o′22,...,o′0t1,o′1t2,o′2t3，其中t1,t2,t3分别表示三比特软信息的序列长度。将比特软信息按照原始比特位置进行分组得到，原始信息比特
Figure PCTCN2017082294-appb-000016
对应的软信息序列分别为：第三比特软信息序列o′01,o′02,...,o′0t1、第四比特软信息序列o′11,o′12,...,o′1t2、第五比特软信息序列 o′21,o′22,...,o′2t3。这里，根据ACK/NACK信息为2bit时的编码特性，各比特软信息序列的长度可能不同，但长度差仅为1。
例如，在ACK/NACK信息为2bit符号数Q′为4时，将原始信息比特解映射后得到比特软信息为：o′01,o′11,o′21,o′02,o′12,o′22,o′03,o′13，这里，1个符号可以解映射出2bit的软信息。将软信息序列按照原始比特位置进行分组后，原始信息比特
Figure PCTCN2017082294-appb-000017
对应的软信息分别为：o′01,o′02,o′03、o′11,o′12,o′13、o′21,o′22，这里三比特软信息的序列长度分别为：t1＝3,t2＝3,t3＝2。可以看出t1,t2,t3值不相等，且差值最多为1。
步骤301：根据所述比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和，得到所述ACK/NACK信息的检测值；或者，对所述比特软信息进行修正，根据修正后的比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和，得到所述ACK/NACK信息的检测值。
在实际实施时，根据ACK/NACK信息比特的不同，在计算ACK/NACK信息的检测值时至少包括以下两种计算方式：
方式1：ACK/NACK信息比特为1bit时，比特软信息序列中所有比特和的平方为：第一比特软信息序列和第二比特软信息序列中所有比特和的平方；比特软信息序列中所有比特平方的和为：第一比特软信息序列和第二比特软信息需序列中所有比特平方的和。
图4为本发明实施例中ACK/NACK信息检测结构的示意图，依据图4和步骤300中获得的第一比特软信息序列：o′1,o′2,...,o′Q′，y对应的第二比特软信息序列：y′1,y′2,...,y′Q′，计算ACK/NACK信息的检测值R，计算公式如下：
Figure PCTCN2017082294-appb-000018
则
Figure PCTCN2017082294-appb-000019
Figure PCTCN2017082294-appb-000020
这里，T1是ACK/NACK信息为1bit时ACK/NACK检测的门限值，该门限值依据实际PUSCH信道质量而确定，也就是说，ACK/NACK信息为1bit时，图4中的T为T1。DTX_flag＝1时表示此时PUSCH信道上获得的数据中存在ACK/NACK信息复用，DTX_flag＝0时表示不存在ACK/NACK信息复用，即出现DTX。
方式2：ACK/NACK信息为2bit时，首先需要对所述比特软信息进行修正，然后计算修正后的比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和之比，得到所述ACK/NACK信息的检测值。
这里，对所述比特软信息进行修正可以是：对所述第三比特软信息序列、第四比特软信息序列和第五比特软信息序列进行译码并映射，得到对应的第三修正值系数、第四修正值系数和第五修正值系数；对所述第三比特软信息序列中所有比特求和后乘以所述第三修正值系数得到第三修正值，对所述第四比特软信息序列中所有比特求和后乘以所述第四修正值系数得到第四修正值，对所述第五比特软信息序列中所有比特求和后乘以所述第五修正值系数得到第五修正值。
相应地，所述修正后的比特软信息之和的平方为：所述第三修正值、所述第四修正值、以及所述第五修正值的和的平方；所述比特软信息中所有比特平方的和为：所述第三比特软信息序列、所述第四比特软信息序列和所述第五比特软信息序列中所有比特平方的和。
示例性的，对比特软信息进行修正的方法可以包括：将
Figure PCTCN2017082294-appb-000021
对应的软信息输入到ACK/NACK译码器，译码后得到[o′0o′1o′2]序列，译码的方法如下：
Figure PCTCN2017082294-appb-000022
其中，i为原始信息中每一个比特的编号；j为一个比特中每一个软信息对应的编号；t比特软信息序列长度。
将序列[o′0o′1o′2]可以按照下述式子映射为
Figure PCTCN2017082294-appb-000023
这里
Figure PCTCN2017082294-appb-000024
分别为第三修正系数、第四修正系数、第五修正系数。
Figure PCTCN2017082294-appb-000025
示例性的，原始信息比特
Figure PCTCN2017082294-appb-000026
对应的软信息分别为
Figure PCTCN2017082294-appb-000027
将软信息译码后得到的序列为[o′0＝0,o′1＝1,o′2＝1]，将序列映射后得到修正系数分别为：
Figure PCTCN2017082294-appb-000028
依据图4和步骤300中获得的第三比特软信息序列o′01,o′02,...,o′0t1、第四比特软信息序列o′11,o′12,...,o′1t2、第五比特软信息序列o′21,o′22,...,o′2t3，以及上述修正系数。计算ACK/NACK信息的检测值R，计算公式如下：
Figure PCTCN2017082294-appb-000029
Figure PCTCN2017082294-appb-000030
Figure PCTCN2017082294-appb-000031
Figure PCTCN2017082294-appb-000032
这里，T2是ACK/NACK信息为2bit时ACK/NACK检测的门限值，该 门限值依据实际PUSCH信道质量而确定。也就是说，ACK/NACK信息为2bit时，图4中的T为T2。DTX_flag＝1时表示此时PUSCH信道上获得的数据中存在ACK/NACK信息复用，DTX_flag＝0时表示不存在ACK/NACK信息复用，即出现DTX。
需要说明的是，ACK/NACK信息超过2bit时，结束流程。
步骤302：ACK/NACK信息的检测值大于预设的门限值时，确定PUSCH上存在ACK/NACK信息。
在实际实施时，所述ACK/NACK信息的检测值小于等于预设的门限值，所述PUSCH上不存在ACK/NACK信息，即出现DTX。
从上述A和B的计算公式可以看出，在PUSCH上复用ACK/NACK信息时，接收端ACK/NACK信息位置处符号解调得到的软比特信息具有一定的特征。ACK/NACK信息为1bit时，这些位置的符号解调得到的前两软比特信息正负同号，那么比特和的平方值A将会趋近一个较大的数。ACK/NACK信息为2bit时，这些位置的符号解调得到的三比特软信息分别求和，经过乘以估计比特的修正值后，每一个比特软信息的正负也将一致，同样它们的比特和的平方值A也会趋近一个较大的数。当在PUSCH上没有复用ACK/NACK信息时，ACK/NACK信息本该占用的位置却发送的是业务数据。从比特级考虑，这些位置的业务数据比特呈现出随机性，也就是说，将这些位置的符号解调得到的比特软信息具有正负随机性，那么它们的比特和的平方值A会趋近一个较小的数。
由于比特和的平方值A和比特平方的和值B具有较大倍数的差异，因此在PUSCH上复用ACK/NACK信息时得到的检测值R1，与在PUSCH上没有复用ACK/NACK信息时得到的检测值R2具有较大倍数的差异，这给门限T的选择预留了很大的空间来对抗噪声和衰落等带来的影响，使得门限值T在不能随着噪声等因素快速准确变化时也能够有效地检测ACK/NACK信 息是否存在，保证了ACK/NACK信息的漏检概率和错检概率。
本发明实施例提供的ACK/NACK检测方法，就是充分利用了业务数据比特在ACK/NACK信息比特复用位置处的随机性来实现ACK/NACK的检测，且当发送符号Q′越大，应发ACK/NACK信息比特数越多，则随机性越明显，检测性能越好。
本发明实施例中，获得PUSCH上ACK/NACK信息对应的比特软信息；根据所述比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和，得到所述ACK/NACK信息的检测值；或者，对所述比特软信息进行修正，根据修正后的比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和，得到所述ACK/NACK信息的检测值；所述ACK/NACK信息的检测值大于预设的门限值时，确定所述PUSCH上存在ACK/NACK信息。如此，既能简化门限值的选择，又能保证了ACK/NACK信息的漏检概率和错检概率。
第二实施例
为了能更加体现本发明实施例的目的，在本发明第一实施例的基础上，进行进一步的举例说明。
图5为本发明实施例中PUSCH上ACK/NACK信息的检测方法的第二实施例的流程图，该方法包括：
步骤500：对PUSCH上的数据进行处理得到调制符号数据。
在实际实施时，终端接收到基站发送的业务数据后，需要对这些数据进行确认并反馈给基站，ACK/NACK反馈信息可以与业务数据复用后通过PUSCH发送给基站，基站接收端接收到数据后，先对PUSCH上的数据进行一系列的处理，包括信道估计、噪声估计、频偏估计补偿以及均衡等操作。处理之后便可将PUSCH上的数据转化为调制符号数据。
步骤501：对调制符号数据解复用，得到ACK/NACK符号序列。
步骤502：依据对应的调制方式对ACK/NACK信息的符号序列解映射，得到对应的比特软信息。
本步骤中，将得到的ACK/NACK信息的符号序列s1,...,sQ′解映射后得到对应的比特软信息为：
Figure PCTCN2017082294-appb-000033
其中Qm表示调制阶数。
步骤503：将比特软信息按照原始比特位置进行分组。
示例性的，ACK/NACK信息为1bit时，将软信息序列分组后得到，比特软信息序列分别为：o′1,o′2,...,o′Q′、y′1,y′2,...,y′Q′。
ACK/NACK信息为2bit时，将软信息序列分组后得到，比特软信息序列分别为：o′01,o′02,...,o′0t1、o′11,o′12,...,o′1t2、o′21,o′22,...,o′2t3。
步骤504：计算ACK/NACK信息的检测值，判断是否存在ACK/NACK信息。
本步骤中，对于ACK/NACK信息的检测值的计算包括以下两种方式：
方式1：在理想情况下ACK/NACK信息为1bit时，利用原始信息比特
Figure PCTCN2017082294-appb-000034
对应的比特软信息进行ACK/NACK信息检测。
由于y是
Figure PCTCN2017082294-appb-000035
的重复，所以y对应的第二比特软信息序列y′1,y′2,...,y′Q′与
Figure PCTCN2017082294-appb-000036
对应的第一比特软信息序列o′1,o′2,...,o′Q′相同，即o′i＝y′i＝C,i＝1,2,...,Q′。此时ACK/NACK信息检测值的计算公式可以为：
Figure PCTCN2017082294-appb-000037
Figure PCTCN2017082294-appb-000038
则检测值为：
Figure PCTCN2017082294-appb-000039
此时，
Figure PCTCN2017082294-appb-000040
方式2：在理想情况下ACK/NACK信息为2bit时，利用原始信息比特
Figure PCTCN2017082294-appb-000041
对应的比特软信息进行ACK/NACK信息检测。设Q′为3的倍数，则
Figure PCTCN2017082294-appb-000042
对应的软信息序列长度都相同，均为2Q′/3。且软信息o′0i、o′1i和o′2i的取值也相同，即o′0i＝o′1i＝o′2i＝D,i＝1,2,...,Q′。
示例性的，在ACK/NACK符号数Q′为6时，原始信息比特
Figure PCTCN2017082294-appb-000043
对应的软信息分别为：o′01,o′02,o′03,o′04、o′11,o′12,o′13,o′14、o′21,o′22,o′23,o′24，此时三比特软信息的序列长度均为4。
在理想情况下，ACK/NACK信息检测值的计算公式可以为：
Figure PCTCN2017082294-appb-000044
Figure PCTCN2017082294-appb-000045
则检测值为
Figure PCTCN2017082294-appb-000046
在一实施例中，通过ACK/NACK信息的检测值与门限值的比较结果，设置ACK/NACK信息检测的标志位DTX_flag。
此时，
Figure PCTCN2017082294-appb-000047
DTX_flag＝1时表示此时PUSCH信道上获得的数据中存在ACK/NACK信息复用，DTX_flag＝0时表示不存在ACK/NACK信息复用，即出现DTX。
分析方式1和方式2的计算结果可以看出，检测值R与符号数Q′成正 比。例如，设存在ACK/NACK信息时检测值为R1，不存在ACK/NACK信息时检测值为R2。则当Q′＝9且存在ACK/NACK信息，则ACK/NACK信息为1bit和2bit时检测值R1的理论值均为18；若不存在ACK/NACK信息时B值基本不变，A值因为业务数据比特呈现出较强的随机性使取值维持在一个较小的范围，则检测值R2也较小。此时检测值R2会远远小于检测值R1。这样只要选定合适的门限T(R2≤T≤R1)，就能有效地检测到是否存在ACK/NACK信息。T越接近R1错检概率越小，漏检概率越大；T越接近R2漏检概率越小，错检概率越大。
当信道噪声较小，发送符号数Q′较大时，选择较大的门限T，反之选择较小的门限T。总之，本发明实施例中提供的ACK/NACK检测方法使得用于门限比较的ACK/NACK检测值R大大增大，这样即使PUSCH信道质量变化较快造成门限T的选择不精确，也不会降低ACK/NACK的检测性能，因此，本发明实施例中提供的ACK/NACK检测方法增强了ACK/NACK的检测性能，提高了抗干扰性。
第三实施例
针对本发明实施例的方法，本发明实施例还提供了一种PUSCH上ACK/NACK信息的检测装置，图6为本发明实施例PUSCH上ACK/NACK信息的检测装置的组成结构示意图，如图6所示，该装置包括：获取模块600、计算模块601和确定模块602；其中，
获取模块600，配置为获得PUSCH上ACK/NACK信息对应的比特软信息。
计算模块601，配置为根据比特软信息中所有比特和的平方与比特软信息中所有比特平方的和，得到ACK/NACK信息的检测值；或者，配置为对比特软信息进行修正，根据修正后的比特软信息中所有比特和的平方与比 特软信息中所有比特平方的和，得到ACK/NACK信息的检测值。
确定模块602，配置为在ACK/NACK信息的检测值大于预设的门限值时，确定所述PUSCH上存在ACK/NACK信息。。
计算模块601，还配置为在ACK/NACK信息为1bit时，计算比特软信息中所有比特和的平方与比特软信息中所有比特平方的和之比，得到ACK/NACK信息的检测值。
在一实施例中，计算模块601，还配置为对比特软信息进行分组，得到：第一比特软信息序列和第二比特软信息序列；相应地，比特软信息序列中所有比特和的平方为：第一比特软信息序列和第二比特软信息序列中所有比特和的平方；比特软信息序列中所有比特平方的和为：第一比特软信息序列和第二比特软信息需序列中所有比特平方的和。
计算模块601，还配置为在ACK/NACK信息为2bit时，对比特软信息进行修正，计算修正后的比特软信息中所有比特和的平方与比特软信息中所有比特平方的和之比，得到ACK/NACK信息的检测值。
在一实施例中，计算模块601，还配置为对比特软信息进行分组，得到：第三比特软信息序列、第四比特软信息序列和第五比特软信息序列；
相应地，对比特软信息进行修正包括：对第三比特软信息序列、第四比特软信息序列和第五比特软信息序列进行译码并映射，得到对应的第三修正值系数、第四修正值系数和第五修正值系数；对第三比特软信息序列中所有比特求和后乘以第三修正值系数得到第三修正值，对第四比特软信息序列中所有比特求和后乘以第四修正值系数得到第四修正值，对第五比特软信息序列中所有比特求和后乘以第五修正值系数得到第五修正值；
相应地，修正后的比特软信息中所有比特和的平方为：第三修正值、第四修正值、以及第五修正值的和的平方；比特软信息中所有比特平方的和为：第三比特软信息序列、第四比特软信息序列和第五比特软信息序列 中所有比特平方的和。
确定模块602，还配置为在ACK/NACK信息的检测值小于等于预设的门限值时，确定PUSCH上不存在ACK/NACK信息。
在实际应用中，获取模块600、计算模块601和确定模块602均可由位于终端设备中的中央处理器(Central Processing Unit，CPU)、微处理器(Micro Processor Unit，MPU)、数字信号处理器(Digital Signal Processor，DSP)、或现场可编程门阵列(Field Programmable Gate Array，FPGA)等实现。
本发明实施例中，如果以软件功能模块的形式实现上述ACK/NACK信息的检测方法，并作为独立的产品销售或使用时，也可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明实施例的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机、服务器、或者网络设备等)执行本发明各个实施例所述方法的全部或部分。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read Only Memory，ROM)、磁碟或者光盘等各种可以存储程序代码的介质。这样，本发明实施例不限制于任何特定的硬件和软件结合。
相应地，本发明实施例还提供一种计算机存储介质，该计算机存储介质中存储有计算机程序，该计算机程序用于执行本发明实施例的上述ACK/NACK信息的检测方法。
本领域内的技术人员应明白，本发明的实施例可提供为方法、系统、或计算机程序产品。因此，本发明可采用硬件实施例、软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
以上所述，仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围。
工业实用性
本发明实施例获得PUSCH上ACK/NACK信息对应的比特软信息；根据所述比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和，得到所述ACK/NACK信息的检测值；或者，对所述比特软信息进行修正，根据修正后的比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和，得到所述ACK/NACK信息的检测值；所述ACK/NACK 信息的检测值大于预设的门限值时，确定所述PUSCH上存在ACK/NACK信息。如此，既能简化门限值的选择，又能保证ACK/NACK信息的漏检概率和错检概率。

Claims (11)

  1. 一种确认/非确认ACK/NACK信息的检测方法，所述方法包括：
    获得物理上行共享信道PUSCH上ACK/NACK信息对应的比特软信息；
    根据所述比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和，得到所述ACK/NACK信息的检测值；
    或者，对所述比特软信息进行修正，根据修正后的比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和，得到所述ACK/NACK信息的检测值；
    当所述ACK/NACK信息的检测值大于预设的门限值时，确定所述PUSCH上存在ACK/NACK信息。
  2. 根据权利要求1所述的方法，其中，所述根据所述比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和，得到所述ACK/NACK信息的检测值包括：
    当所述ACK/NACK信息为1bit时，计算所述比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和之比，得到所述ACK/NACK信息的检测值。
  3. 根据权利要求2所述的方法，其中，在获得PUSCH上ACK/NACK信息对应的比特软信息后，所述方法还包括：
    在所述ACK/NACK信息为1bit时，对所述比特软信息进行分组，得到：第一比特软信息序列和第二比特软信息序列；
    相应地，所述比特软信息序列中所有比特和的平方为：所述第一比特软信息序列和所述第二比特软信息序列中所有比特和的平方；所述比特软信息序列中所有比特平方的和为：所述第一比特软信息序列和所述第二比特软信息需序列中所有比特平方的和。
  4. 根据权利要求1所述的方法，其中，所述对所述比特软信息进行修正，根据修正后的比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和，得到所述ACK/NACK信息的检测值，包括：
    在所述ACK/NACK信息为2bit时，对所述比特软信息进行修正，计算修正后的比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和之比，得到所述ACK/NACK信息的检测值。
  5. 根据权利要求4所述的方法，其中，在获得PUSCH上ACK/NACK信息对应的比特软信息后，所述方法还包括：
    在所述ACK/NACK信息为2bit时，对所述比特软信息进行分组，得到：第三比特软信息序列、第四比特软信息序列和第五比特软信息序列；
    相应地，对所述比特软信息进行修正包括：
    对所述第三比特软信息序列、第四比特软信息序列和第五比特软信息序列进行译码并映射，得到对应的第三修正值系数、第四修正值系数和第五修正值系数；对所述第三比特软信息序列中所有比特求和后乘以所述第三修正值系数得到第三修正值，对所述第四比特软信息序列中所有比特求和后乘以所述第四修正值系数得到第四修正值，对所述第五比特软信息序列中所有比特求和后乘以所述第五修正值系数得到第五修正值；
    相应地，所述修正后的比特软信息中所有比特和的平方为：所述第三修正值、所述第四修正值、以及所述第五修正值的和的平方；所述比特软信息中所有比特平方的和为：所述第三比特软信息序列、所述第四比特软信息序列和所述第五比特软信息序列中所有比特平方的和。
  6. 根据权利要求1所述的方法，其中，在得到所述ACK/NACK信息的检测值之后，所述方法还包括：
    在所述ACK/NACK信息的检测值小于等于预设的门限值时，确定所述PUSCH上不存在ACK/NACK信息。
  7. 一种确认/非确认ACK/NACK信息的检测装置，所述装置包括：获取模块、计算模块和确定模块；其中，
    获取模块，配置为获得物理上行共享信道PUSCH上ACK/NACK信息对应的比特软信息；
    计算模块，配置为根据所述比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和，得到所述ACK/NACK信息的检测值；或者，配置为对所述比特软信息进行修正，根据修正后的比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和，得到所述ACK/NACK信息的检测值；
    确定模块，配置为在所述ACK/NACK信息的检测值大于预设的门限值时，确定所述PUSCH上存在ACK/NACK信息。
  8. 根据权利要求7所述的装置，其中，所述计算模块，还配置为在所述ACK/NACK信息为1bit时，计算所述比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和之比，得到所述ACK/NACK信息的检测值。
  9. 根据权利要求7所述的装置，其中，所述计算模块，还配置为在所述ACK/NACK信息为2bit时，对所述比特软信息进行修正，计算修正后的比特软信息中所有比特和的平方与所述比特软信息中所有比特平方的和之比，得到所述ACK/NACK信息的检测值。
  10. 根据权利要求7所述的装置，其中，所述确定模块，还配置为在所述ACK/NACK信息的检测值小于等于预设的门限值时，确定所述PUSCH上不存在ACK/NACK信息。
  11. 一种计算机存储介质，所述计算机存储介质中存储有计算机可执行指令，该计算机可执行指令用于执行权利要求1至6任一项所述的确认/非确认ACK/NACK信息的检测方法。
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