WO2018227394A1 - 下行反馈发送、接收方法及装置 - Google Patents

下行反馈发送、接收方法及装置 Download PDF

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Publication number
WO2018227394A1
WO2018227394A1 PCT/CN2017/088106 CN2017088106W WO2018227394A1 WO 2018227394 A1 WO2018227394 A1 WO 2018227394A1 CN 2017088106 W CN2017088106 W CN 2017088106W WO 2018227394 A1 WO2018227394 A1 WO 2018227394A1
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WIPO (PCT)
Prior art keywords
sequence
network device
terminal
correlation value
processing
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PCT/CN2017/088106
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English (en)
French (fr)
Inventor
李铮
吴毅凌
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华为技术有限公司
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Priority to PCT/CN2017/088106 priority Critical patent/WO2018227394A1/zh
Publication of WO2018227394A1 publication Critical patent/WO2018227394A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a downlink feedback sending and receiving method and apparatus.
  • IoT systems that operate on licensed spectrum, such as the Narrow Band Internet of Things (NB-IOT) and Enhanced Machine Type Communications (eMTC), etc.
  • NB-IOT Narrow Band Internet of Things
  • eMTC Enhanced Machine Type Communications
  • the enterprise-level Internet of Things working on the unlicensed spectrum is in the process of communication. Due to the regulatory requirements on the unlicensed spectrum, the uplink resource allocation of the communication system uses the Slot Aloha mode without centralized scheduling, which also brings problems.
  • the terminal uses the contention-based transmission mode to transmit uplink data on the uplink channel. For example, multiple terminals may select the same physical uplink shared channel (Physical Uplink Shared).
  • the uplink data is transmitted in the channel, PUSCH, so that multiple terminals may collide and collide during the uplink data transmission on the same PUSCH.
  • the terminal After transmitting the uplink data on the PUSCH, the terminal needs to receive downlink feedback of the uplink data in the corresponding downlink physical hybrid automatic repeat request indication channel (PHICH).
  • PHICH physical hybrid automatic repeat request indication channel
  • downlink feedback for uplink data transmitted in a contentive manner mainly has two feedback strategies based on a channel and a terminal.
  • the network device Based on the downlink feedback policy of the channel, the network device (for example, the base station), on an uplink channel, feeds back an Acknowledgement (ACK) if it determines that the uplink data is correctly received, and the ACK is represented by 1 bit, and vice versa. If the network device determines that the uplink data is not correctly received, the error acknowledgement command (Negative Acknowledge (NACK) is fed back, the NACK is represented by 1 bit 0, and the terminal obtains the feedback result by detecting the bit 0 or 1.
  • FIG. 1 is a flowchart of a channel-based downlink feedback method implementation. The network device side mainly includes bit level processing and symbol level processing.
  • the PHICH bit number n that needs to be fed back can be configured in one downlink channel, and the PHICH is channel-coded (for example, the forward/reverse code), and then repeated and scrambled.
  • the PHICH is fixed by Binary Phase Shift Keying (BPSK) modulation, and the scrambled result is mapped to the resource element (Resource Element, RE) of the bit data.
  • BPSK Binary Phase Shift Keying
  • RE Resource Element
  • OFDM Orthogonal Frequency Division Multiplexing
  • the terminal When the PHICH is read, the terminal needs to perform a process opposite to the network device, that is, performing symbol level processing and bit level processing respectively, and finally obtaining the PHICH.
  • the advantage of channel-based downlink feedback is that the bit information can be channel-encoded, and the resources can be repeated, so that better coverage performance can be obtained.
  • the disadvantage is that the resource conflict cannot be distinguished, if two terminals are simultaneously transmitted in one uplink channel.
  • the network device correctly parses the uplink data sent by one terminal and sends one bit 1 representing the ACK.
  • the collided terminal mistakenly thinks it is its own ACK, resulting in Radio Link Control (RLC).
  • RLC Radio Link Control
  • the network device Based on the downlink feedback policy of the terminal, the network device sends a sequence related to the terminal identifier (Identification, ID) on an uplink channel, if it is determined that the uplink data is correctly received, and the terminal detects the sequence related to the terminal identifier. Get feedback.
  • FIG. 2 is a flowchart of implementing a terminal-based downlink feedback method. Referring to FIG. 2, for each terminal that the uplink data is correctly received by the network device, the network device generates a binary pseudo according to the ID of the terminal.
  • Random sequence, BPSK mapping of binary pseudo-random sequences into complex-valued sequences, phase rotation between terminals to distinguish different terminals, superimposed and generated normal-valued sequences are normalized, and then normalized
  • the sequence is mapped to the data RE position, and the inverse inverse Fourier transform (IFFT) is performed, and the Cyclic Prefix (CP) is added, and the reference signal (Reference Signal, RS) is generated to generate the orthogonal frequency division complex.
  • IFFT inverse inverse Fourier transform
  • CP Cyclic Prefix
  • RS Reference Signal
  • the (Orthogonal Frequency Division Multiplexing, OFDM) signal is transmitted to the terminal on the downlink channel.
  • the terminal After receiving the OFDM signal sent by the network device, the terminal removes the CP, performs Fast Fourier Transform (FFT), and performs demapping processing, and performs channel estimation and data signal position equalization by using the received signal of the reference signal position and the local reference signal. .
  • the terminal generates a local complex sequence according to the terminal ID, and performs correlation calculation between the equalized received signal and the locally generated complex sequence, and determines a feedback result according to the correlation value and the threshold value, wherein the correlation value exceeds the threshold as ACK, otherwise For NACK.
  • the network device Based on the downlink feedback of the terminal, the network device only sends a sequence related to the terminal ID to the terminal that correctly receives the uplink data, thereby preventing the terminal from being misdetected by the conflict of resources.
  • the autocorrelation value of the terminal that normally transmits the uplink data and the cross-correlation value of the terminal that has the resource conflict are poorly differentiated. If the threshold is set too low, the terminal that has the resource conflict is prone to error. If the ACK is detected, the probability of false alarms is high. If the threshold is set too high, the probability of missed detection of the terminal that normally sends uplink data will be higher. In order to improve the above situation, only the signal to noise ratio can be improved, but increasing the signal to noise ratio results in poor coverage performance.
  • the embodiments of the present application provide a downlink feedback sending and receiving method and device, so as to ensure coverage performance and effectively distinguish resource conflicts.
  • a downlink feedback sending method determines whether uplink data sent by the terminal is correctly received on the uplink channel. If the network device determines that the uplink data sent by the terminal is correctly received on the uplink channel, the network device determines the sequence according to the terminal identifier, and sends the sequence according to the terminal identifier. If the network device determines that the uplink data sent by the terminal is not correctly received on the uplink channel, the network device determines a sequence according to the uplink channel identifier, and sends the sequence determined according to the uplink channel identifier.
  • the downlink feedback sending method is configured to determine, according to the sequence determined by the terminal identifier or according to the uplink channel identifier, whether the network device correctly receives the uplink data on the uplink channel.
  • the sequence is sent to the terminal during downlink feedback, so the terminal also predetermines. If there is no resource conflict with other terminals, the downlink feedback sent by the network device for the uplink channel will be received, which will inevitably be received. If a sequence of feedback to the network device conflicts with other terminals, neither the sequence determined according to the terminal identifier nor the sequence determined according to the uplink channel identifier is received, and the determined network device can be improved to a certain extent. Whether the detection success rate of the uplink data is correctly received.
  • the sequence generated according to the terminal identifier may be referred to as a first sequence, and the first sequence is used to represent the network device in the first uplink channel.
  • the uplink data corresponding to the first terminal is correctly received, and the first sequence is a sequence determined according to the first terminal identifier.
  • the sequence generated according to the uplink channel identifier may be referred to as a second sequence, and the second sequence is used to characterize the network device in the first uplink channel.
  • the uplink data is not correctly received, and the second sequence is a sequence determined according to the first uplink channel identifier.
  • the network device may generate the first sequence based on the terminal identifier and a time parameter characterizing the first sequence transmission time.
  • the time parameter for characterizing the transmission time of the first sequence may be a subframe sequence number, a frame sequence number, Super frame number, etc.
  • the network device may further acquire the first sequence in the first sequence set according to the mapping relationship between the terminal identifier and the first sequence.
  • the network device may also obtain the first sequence in the first sequence set according to the first index information.
  • the first index information has a corresponding relationship with the first sequence and the terminal identifier.
  • the mapping relationship may be preset.
  • the network device may generate a second sequence based on the uplink channel identification and a time parameter characterizing the second sequence transmission time.
  • the time parameter for characterizing the transmission time of the second sequence may be a subframe number, a frame number, a super frame number, and the like.
  • the network device may further acquire the second sequence in the second sequence set according to a preset mapping relationship between the uplink channel identifier and the second sequence.
  • the network device may also acquire the second sequence in the second sequence set according to the second index information.
  • the second index information has a correspondence relationship with the second sequence and the uplink channel identifier.
  • the first sequence when the network device determines that the first sequence needs to be sent, the first sequence may be sent on the downlink channel.
  • the network device may also process the first sequence and transmit the sequence after processing the first sequence on the downlink channel.
  • the second sequence can be sent on the downlink channel.
  • the network device may also process the second sequence and transmit the sequence after processing the second sequence on the downlink channel.
  • the first sequence may be modulated, and each element in the modulated first sequence is XORed with the first data.
  • the second sequence may be modulated, and each element in the second sequence obtained after the modulation is XORed with the second value.
  • the first value is different from the second value and is one of 0 and 1.
  • the network device if it is determined that the first sequence needs to be sent, modulates the first sequence and performs a first phase rotation on the modulated first sequence.
  • the network device if it is determined that the second sequence needs to be transmitted, modulates the second sequence and performs the second phase rotation on the modulated second sequence. Wherein the first phase is different from the second phase.
  • the sequence is modulated by the foregoing, and the modulated sequence is subjected to exclusive OR operation or phase adjustment, so that the first sequence and the second sequence are modulated, mapped to different constellation points, and after superposition Have a better peak-to-average ratio.
  • the first sequence of the multiple uplink channels may be processed and then superimposed and transmitted on one downlink channel to save channel resources.
  • the processing of the first sequence of the plurality of uplink channels by the network device may include at least one of modulation, phase rotation, superposition, and normalization processing.
  • the plurality of uplink channels include a first uplink channel and at least one second uplink channel, where the first terminal sends uplink data to the network device on the first uplink channel, and the network device determines the first sequence for the first uplink channel, and is in the first A downlink sequence transmits the first sequence.
  • the second terminal sends uplink data to the network device on the second uplink channel, and the network device determines a third sequence for the second uplink channel.
  • the network device may send the first sequence in one of the following ways:
  • the network device sends the first sequence on the first downlink channel; or the network device sends a sequence obtained by performing the first processing on the first sequence on the first downlink channel; or the network device sends on the first downlink channel a sequence obtained by performing a second process on the first sequence and the at least one third sequence; wherein the at least one third sequence is determined by the network device for each of the at least one second uplink channel; or the network device is And transmitting, on the first downlink channel, a sequence obtained by performing a second processing on the fourth sequence set, where the fourth sequence set includes a sequence obtained by performing first processing on the first sequence, and at least A sequence obtained by performing a first processing on a third sequence, the at least one third sequence being determined by the network device for each of the at least one second uplink channel.
  • the second sequence of the multiple uplink channels may be processed and then superimposed and transmitted on one downlink channel to save channel resources.
  • the processing of the second sequence of the plurality of uplink channels by the network device may include at least one of modulation, phase rotation, superposition, and normalization processing.
  • multiple uplink channels The first uplink channel and the at least one second uplink channel are included, the first terminal sends uplink data to the network device on the first uplink channel, and the network device determines a second sequence for the first uplink channel, and sends the second sequence on the first downlink channel.
  • Two sequences The second terminal sends uplink data to the network device on the second uplink channel, and the network device determines a third sequence for the second uplink channel.
  • the network device can send the second sequence in one of the following ways:
  • the network device sends a second sequence on the first downlink channel; or the network device sends a sequence obtained by performing the first processing on the second sequence on the first downlink channel; or the network device is on the first downlink channel And transmitting a sequence obtained by performing a second processing on the second sequence and the at least one third sequence, where the at least one third sequence is determined by the network device for the at least one second uplink channel, respectively; or the network device is on the first downlink channel And sending a sequence obtained by performing a second processing on the fourth sequence set, where the fourth sequence set includes a sequence obtained by performing the first processing on the second sequence, and performing the first processing on the at least one third sequence
  • the sequence of at least one third sequence is determined by the network device for each of the at least one second upstream channel.
  • channel resources can be saved.
  • the first sequence may be any one of a Golden sequence, an m sequence, and a ZC (Zadoff-Chu) sequence
  • the second sequence may also be a Golden sequence, an m sequence.
  • any of the ZC (Zadoff-Chu) sequences to achieve better performance for downlink feedback transmission.
  • the Golden sequence can directly use the terminal identifier as a seed, which saves signaling overhead.
  • a downlink feedback receiving method receives a fifth sequence from a network device.
  • the fifth sequence can be understood as a sequence in which the first sequence or the second sequence transmitted by the network device is processed and noise is added.
  • the terminal determines the first correlation value and the second correlation value according to the received fifth sequence, and determines, according to the first correlation value and the second correlation value, whether the network device correctly receives the uplink data sent by the terminal on the first uplink channel.
  • the terminal determines, according to the two correlation values, whether the network device correctly receives the uplink data sent by the terminal on the first uplink channel, and determines whether the network device correctly receives the terminal in the first uplink channel according to a correlation value.
  • the uplink data sent on the uplink improves the detection success rate to some extent.
  • the terminal may locally determine the sixth sequence according to the terminal identifier, process the fifth sequence and the sixth sequence to obtain a first correlation value, and determine the uplink channel identifier according to the uplink channel that sends the uplink data. Seven sequences, the fifth sequence and the seventh sequence are processed to obtain a second correlation value.
  • the terminal generates a sixth sequence and a seventh sequence according to the terminal identifier and the uplink channel identifier, and performs related operations with the fifth sequence to obtain a first correlation value and a second correlation value, and uses the first correlation value and the first
  • the second correlation value determines whether the network device correctly receives the uplink data sent by the terminal on the first uplink channel, and determines whether the network device correctly receives the uplink data sent by the terminal on the first uplink channel according to a correlation value, which can be reduced.
  • the probability of the ACK being misdetected by the terminal in which the resource conflict occurs thereby reducing the false alarm probability of the terminal where the resource conflict occurs to some extent, and effectively distinguishing the resource conflict.
  • the detection success rate of the terminal that normally transmits the uplink data can be improved, and the coverage performance is ensured.
  • the terminal may perform joint estimation detection by using the first correlation value and the second correlation value, and determine, according to the joint estimation detection result, whether the network device successfully receives the terminal in the first uplink. Uplink data on the channel.
  • joint estimation detection may be performed by using the joint estimation detection value of the first correlation value and the second correlation value.
  • the joint estimated detection value may include: a difference between the first correlation value and the second correlation value; or a ratio between the first correlation value and the second correlation value; or a sum of an absolute value of the first correlation value and an absolute value of the second correlation value.
  • the terminal may perform a joint estimation detection process, and set a corresponding joint detection threshold for the first correlation value, the second correlation value, and the joint estimation detection value, by comparing the first correlation value, the second correlation value, and the joint estimation detection value, And determining, by the network device, whether the network device successfully receives the uplink data of the terminal on the first uplink channel.
  • the terminal may determine that the network device correctly receives the uplink data sent by the terminal on the first uplink channel. If the first correlation value is less than or equal to the preset first joint detection threshold, the second correlation value is greater than the preset second joint detection threshold, and the joint estimation detection value of the first correlation value and the second correlation value is less than The third joint detection threshold is determined, and the terminal may determine that the network device does not correctly receive the uplink data sent by the terminal on the first uplink channel. If the joint estimation detection value of the first correlation value and the second correlation value is less than the set third joint detection threshold, the terminal may determine that the network device does not correctly receive the uplink data sent by the terminal on the first uplink channel, and A terminal for resource conflicts.
  • the sixth sequence may be any one of a Golden sequence, an m sequence, and a ZC (Zadoff-Chu) sequence
  • the seventh sequence may also be a Golden sequence, an m sequence, and a ZC (Zadoff-Chu). Any of the sequences to achieve better performance for downlink feedback reception.
  • the Golden sequence can directly use the terminal identifier as a seed, which saves signaling overhead.
  • a downlink feedback sending apparatus configured to implement the network device function related to the first aspect, and the function may be implemented by using hardware or by executing corresponding software by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the modules can be software and/or hardware.
  • the downlink feedback sending device includes a processing unit and a sending unit, and the functions performed by the sending unit and the processing unit may correspond to the method steps, and details are not described herein.
  • a network device comprising a processor, a transceiver, and a memory.
  • the memory is for coupling to a processor that holds program instructions and data necessary for the network device.
  • the processor, the transceiver and the memory are connected, the memory is for storing instructions for executing the instructions stored by the memory to control the transceiver to send and receive signals, completing the first aspect and any possible design of the first aspect The method of execution of the network device.
  • a downlink feedback receiving apparatus configured to implement the terminal function related to the second aspect, and the function may be implemented by using hardware or by executing corresponding software by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the modules can be software and/or hardware.
  • the downlink feedback receiving device includes a receiving unit and a processing unit, and the functions of the receiving unit and the processing unit may correspond to the method steps, and details are not described herein.
  • a terminal comprising a processor, a transmitter and a receiver, and a memory, the memory being for coupling with the processor, which stores program instructions and data necessary for the terminal.
  • the processor executes instructions stored in the memory to perform the functions of the terminal in the first aspect above and in any of the possible designs of the first aspect described above.
  • the terminal may also include an antenna.
  • a communication system comprising the network device of the fourth aspect, and one or more terminals related to the sixth aspect.
  • a computer storage medium for storing instructions that, when executed, can perform any of the methods of the first aspect and the network device in any of the possible aspects of the first aspect, or Any of the methods involved in the second aspect and the terminal in any of the possible aspects of the second aspect described above may be accomplished.
  • a computer program product for storing a computer program for performing any one of the methods related to the network device in the first aspect and any of the foregoing possible aspects of the first aspect, or Completing the second aspect and any of the methods involved in the terminal in any of the possible aspects of the second aspect described above.
  • the downlink feedback sending and receiving method and device determine a sequence for the first uplink channel regardless of whether the network device correctly receives the uplink data on the uplink channel, and sends the sequence to the terminal when the downlink feedback is performed, so
  • the terminal also determines in advance that if there is no resource conflict with other terminals, the downlink feedback sent by the network device for the first uplink channel is inevitably received, that is, the first sequence or the second sequence is inevitably received, if When a resource conflict occurs in another terminal, neither the first sequence nor the second sequence is received, and the detection success rate for determining whether the network device correctly receives the uplink data may be improved to some extent.
  • the terminal determines, according to the two correlation values, whether the network device correctly receives the uplink data sent by the terminal on the first uplink channel, and determines whether the network device correctly receives the uplink data sent by the terminal on the first uplink channel according to a correlation value. To some extent, the detection success rate is improved. And the network device determines the first sequence based on the terminal identifier or determines the second sequence based on the first channel identifier, effectively reducing the false alarm probability of the collision user, effectively distinguishing resource conflicts, and ensuring coverage performance.
  • FIG. 3 is a system architecture diagram of an application according to an embodiment of the present application.
  • FIG. 5 is a flowchart of another implementation of a downlink feedback method according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of a downlink feedback sending apparatus according to an embodiment of the present disclosure.
  • FIG. 7 is another schematic structural diagram of a downlink feedback sending apparatus according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a downlink feedback receiving apparatus according to an embodiment of the present disclosure.
  • FIG. 9 is another schematic structural diagram of a downlink feedback receiving apparatus according to an embodiment of the present application.
  • a network device which may be referred to as a radio access network (RAN) device, is a device that connects a terminal to a wireless network, including but not limited to: an evolved Node B (evolved Node B, eNB), Radio Network Controller (RNC), Node B (Node B, NB), Base Station Controller (BSC), Base Transceiver Station (BTS), and home base station (for example) , Home evolved NodeB, or Home Node B, HNB), Base Band Unit (BBU), Wireless Fidelity (WIFI) Access Point (AP), transmission point (transmission and receiver point, TRP or transmission point (TP), Node B (gNB) that continues to evolve, and so on.
  • RAN radio access network
  • a terminal is a device that provides voice and/or data connectivity to users, and can include various wireless devices. Handheld device, in-vehicle device, wearable device, computing device or other processing device connected to the wireless modem, and various forms of User Equipment (UE), mobile station (MS), terminal device (Terminal Equipment), transmission and receiver point (TRP or transmission point, TP) and so on.
  • UE User Equipment
  • MS mobile station
  • TRP transmission and receiver point
  • the interaction in this application refers to the process in which the two parties exchange information with each other.
  • the information transmitted here may be the same or different.
  • the two parties are the base station 1 and the base station 2, and the base station 1 may request information from the base station 2, and the base station 2 provides the base station 1 with the information requested by the base station 1.
  • the base station 1 and the base station 2 may request information from each other, and the information requested here may be the same or different.
  • Multiple means two or more. "and/or”, describing the association relationship of the associated objects, indicating that there may be three relationships, for example, A and/or B, which may indicate that there are three cases where A exists separately, A and B exist at the same time, and B exists separately.
  • the character "/" generally indicates that the contextual object is an "or" relationship.
  • the downlink feedback sending and receiving method provided by the embodiment of the present application can be applied to an unlicensed spectrum, such as the enterprise-level Internet of Things communication system shown in FIG. 3, and the enterprise-level Internet of Things communication system is deployed on the spectrum of the unlicensed frequency.
  • a wireless communication system such as a narrowband IoT communication system.
  • the terminal accesses the network through a network device such as a base station, and the network device and the core network complete data back-transfer and forward transmission.
  • the terminal and the network device communicate and interact through the air interface.
  • it can also be applied to the licensed spectrum.
  • the uplink data is usually sent on the uplink channel by using the contention-based transmission mode. Therefore, resource conflict may occur in the process of sending uplink data by multiple terminals.
  • the network device needs to send downlink feedback indicating whether the uplink data sent by the terminal is correctly received, and the terminal receives the downlink feedback sent by the terminal.
  • coverage performance cannot be guaranteed on the basis of ensuring effective differentiation of resource conflicts.
  • the embodiment of the present application provides a downlink feedback method, so as to ensure coverage and effectively distinguish resource conflicts.
  • FIG. 4 is a flowchart of implementing a downlink feedback method according to an embodiment of the present application. Referring to FIG. 4, the method includes:
  • S101 The network device determines whether uplink data is correctly received on the uplink channel.
  • the network device can determine whether the uplink data is correctly received by correctly analyzing the uplink data sent by the terminal on the uplink channel. If the network device parses the uplink data sent by the terminal, it determines that the uplink data sent by the terminal is correctly received. If the network device does not resolve the uplink data sent by the terminal, it determines that the uplink data sent by the terminal is not correctly received.
  • S102 The network device determines a sequence for the uplink channel.
  • the terminal that sends the uplink data on the uplink channel determines the sequence according to the terminal identifier. If the network device determines that the uplink data is not correctly received on the uplink channel, the sequence is determined according to the uplink channel identifier for the uplink channel.
  • the terminal identifier may be an International Mobile Subscriber Identification Number (IMSI), an International Mobile Equipment Identity (IMEI), and an International Mobile Equipment Identity (IMEI and Software Version) carrying a software version number.
  • IMSI International Mobile Subscriber Identification Number
  • IMEI International Mobile Equipment Identity
  • IMEI and Software Version carrying a software version number.
  • Number, IMEISV SAE Temporary Mobile Station Identifier (S-TMSI), Globally unique temporary identifier (GUTI), radio network temporary identifier (RNTI), random access radio network temporary identifier (Random Access RNTI, RA-RNTI), cell radio network temporary identifier (Cell RNTI, C-RNTI), Temporary-Cell RNTI (T-CRNTI), Semi-Persistent Scheduling RNTI (SPS RNTI), Paging Wireless Any one or more of a network temporary identifier (Paging RNTI, P-RNTI), a system information RNTI (SI-RNTI), and the like are used to identify
  • the uplink channel identifier can be understood as information for identifying an uplink channel, such as an uplink channel index in the communication system.
  • the sequence is determined for the uplink channel regardless of whether the network device correctly receives the uplink data on the uplink channel.
  • the sequence determined according to the terminal identifier is referred to as a first sequence, and the first sequence is used to characterize the network device.
  • Uplink data corresponding to the first terminal is correctly received on the first uplink channel, and the first sequence is a sequence determined according to the first terminal identifier.
  • the sequence determined according to the uplink channel identifier is referred to as a second sequence, and the second sequence is used to characterize the network device in the first uplink channel
  • the uplink data is not correctly received, and the second sequence is a sequence determined according to the first uplink channel identifier.
  • the network device may determine the first sequence according to the terminal identifier, or determine the first sequence in combination with the terminal identifier and other information.
  • the network device may determine the first sequence for the uplink channel in one of the following ways:
  • the network device generates a first sequence based on the terminal identifier and a time parameter characterizing the transmission time of the first sequence.
  • the time parameter indicating the sending time of the first sequence may be a subframe number, a frame number, a super frame number, and the like.
  • the network device determines that the first sequence needs to be determined for the uplink channel, and may be based on the terminal that sends the uplink data. And an identifier of the subframe in which the subframe in which the first sequence is located is sent, and a first sequence is generated for the uplink channel.
  • the network device acquires the first sequence in the first sequence set according to the mapping relationship between the terminal identifier and the first sequence, where the mapping relationship may be preset.
  • the first sequence set and the mapping relationship between the terminal identifier and the first sequence may be preset in the embodiment of the present application, and the network device determines that the uplink data sent by the terminal is correctly received on the uplink channel. And determining that the first sequence needs to be determined for the uplink channel, and acquiring the first sequence in the first sequence set according to the preset mapping relationship between the terminal identifier and the first sequence.
  • the network device acquires the first sequence in the first sequence set according to the first index information.
  • the first index information has a corresponding relationship with the first sequence and the terminal identifier.
  • the embodiment of the present application may set the first index information for the terminal identifier and the first sequence corresponding thereto, and the network device determines that the uplink data sent by the terminal is correctly received on the uplink channel, and determines that the uplink is required for the uplink.
  • the corresponding first index information may be determined according to the terminal identifier, and then the first sequence is obtained in the first sequence set according to the first index information.
  • the network device may determine the second sequence separately according to the uplink channel identifier, or may determine the second sequence according to the uplink channel identifier and other information.
  • the second sequence may be determined for the uplink channel by using one of the following manners:
  • a second sequence is generated based on the uplink channel identifier and a time parameter characterizing the second sequence transmission time.
  • the time parameter for characterizing the transmission time of the second sequence may be a subframe number, a frame number, a super frame number, and the like.
  • the second index information has a correspondence relationship with the second sequence and the uplink channel identifier.
  • the network device sends the first sequence if it determines that the uplink data is correctly received on the uplink channel.
  • the network device sends a second sequence if it determines that the uplink data is not correctly received on the uplink channel.
  • the first sequence when the network device determines that the first sequence needs to be sent, the first sequence may be sent on the downlink channel.
  • the second sequence can be sent on the downlink channel.
  • the network device may also process the second sequence and transmit the sequence after processing the second sequence on the downlink channel.
  • the first sequence when the network device determines that the first sequence needs to be sent, the first sequence may be processed, and the sequence processed by the first sequence is sent on the downlink channel.
  • the second sequence may be processed, and the sequence processed by the second sequence is sent on the downlink channel.
  • the first sequence may be modulated, and each element in the modulated first sequence is XORed with the first data.
  • the second sequence may be modulated, and each element in the second sequence obtained after the modulation is XORed with the second value.
  • the first value is different from the second value and is one of 0 and 1.
  • the network device may modulate the first sequence and perform a first phase rotation on the modulated first sequence.
  • the network device if it is determined that the second sequence needs to be transmitted, modulates the second sequence and performs the second phase rotation on the modulated second sequence. Wherein the first phase is different from the second phase.
  • the sequence is modulated by the foregoing, and the modulated sequence is subjected to exclusive OR operation or phase adjustment, so that the first sequence and the second sequence are modulated, mapped to different constellation points, and after superposition Have a better peak-to-average ratio.
  • the first sequence of the multiple uplink channels may be processed and then superimposed and transmitted on one downlink channel to save channel resources.
  • the processing of the first sequence of the plurality of uplink channels by the network device may include at least one of modulation, phase rotation, superposition, and normalization processing.
  • the embodiment of the present application is described by taking a plurality of uplink channels including a first uplink channel and at least one second uplink channel as an example.
  • the first terminal sends uplink data to the network device on the first uplink channel
  • the network device determines a first sequence for the first uplink channel, and sends the first sequence on the first downlink channel.
  • the second terminal sends uplink data to the network device on the second uplink channel, and the sequence determined by the network device for the second uplink channel is referred to as a third sequence
  • the third sequence may be a sequence generated according to the second terminal identifier, or may be A sequence generated according to the second upstream channel identifier.
  • the third sequence is a sequence determined according to the second terminal identifier, if the network device correctly receives uplink data corresponding to the second terminal on the second uplink channel. If the network device does not correctly receive uplink data on the second uplink channel, the third sequence is a sequence determined according to the second uplink channel identifier.
  • the process of modulating a sequence of a network device and performing an exclusive OR operation or phase rotation on the modulated sequence in the embodiment of the present application is referred to as a first process, and the network device is configured to a plurality of uplink channels.
  • the processing of a sequence or a second sequence is referred to as a second process.
  • the implementation manner that the network device sends the first sequence on the first downlink channel may adopt at least one of the following embodiments:
  • S103a The network device sends the first sequence on the first downlink channel.
  • S103b The network device sends, on the first downlink channel, a sequence obtained by performing first processing on the first sequence.
  • the network device sends, on the first downlink channel, a sequence obtained by performing second processing on the first sequence and the at least one third sequence.
  • the at least one third sequence is determined by the network device for each of the at least one second uplink channel.
  • the network device sends, on the first downlink channel, a sequence obtained by performing a second processing on the fourth sequence set.
  • the fourth sequence set includes a sequence obtained by performing first processing on the first sequence, and a sequence obtained by performing first processing on the at least one third sequence.
  • the second sequence of the multiple uplink channels may be processed and then superimposed and transmitted on one downlink channel to save channel resources.
  • the processing of the second sequence of the plurality of uplink channels by the network device may include at least one of modulation, phase rotation, superposition, and normalization processing.
  • the plurality of uplink channels include a first uplink channel and at least one second uplink channel, where the first terminal sends uplink data to the network device on the first uplink channel, and the network device determines the second sequence for the first uplink channel, and is in the first A downlink sequence transmits a second sequence.
  • the second terminal sends uplink data to the network device on the second uplink channel, and the network device determines a third sequence for the second uplink channel.
  • the network device can send the second sequence in one of the following ways:
  • S103a The network device sends the second sequence on the first downlink channel.
  • S103b The network device sends a sequence obtained by performing the first processing on the second sequence on the first downlink channel.
  • the network device sends, on the first downlink channel, a sequence obtained by performing a second process on the second sequence and the at least one third sequence, where the at least one third sequence is determined by the network device for the at least one second uplink channel, respectively.
  • the network device sends, on the first downlink channel, a sequence obtained by performing a second processing on the fourth sequence set, where the fourth sequence set includes a sequence obtained by performing the first processing on the second sequence, and At least one third sequence is subjected to a sequence obtained after the first processing.
  • the sequence is determined for the first uplink channel, and is sent to the terminal during downlink feedback, so the terminal also determines in advance, if not When a resource conflict occurs in another terminal, the downlink feedback sent by the network device for the first uplink channel is inevitably received, that is, the first sequence or the second sequence is inevitably received, and if a resource conflict occurs with other terminals, neither The first sequence will not receive the second sequence, and the detection success rate of determining whether the network device correctly receives the uplink data can be improved to some extent.
  • the sequence that arrives at the terminal side after the air interface transmission may not be the first sequence or the second sequence, but is processed and A sequence of noise is added.
  • the first sequence or the second sequence sent by the network device received by the terminal is referred to as a fifth sequence.
  • S104 The terminal receives the fifth sequence from the network device.
  • S105 The terminal determines the first correlation value and the second correlation value according to the fifth sequence.
  • the terminal determines the sequence according to the identifier of the terminal, and determines the sequence according to the identifier of the uplink channel.
  • the sequence determined by the terminal according to the identifier of the terminal is referred to as a sixth sequence, and the terminal is determined according to the identifier of the uplink channel.
  • the predetermined sequence is called the seventh sequence.
  • the network device may perform a third processing on the fifth sequence and the sixth sequence to obtain a first correlation value, and perform a fourth processing on the fifth sequence and the seventh sequence to obtain a second correlation value.
  • S106 The terminal determines, according to the first correlation value and the second correlation value, whether the network device correctly receives the uplink data sent by the terminal on the first uplink channel.
  • the terminal determines, according to the two correlation values, whether the network device correctly receives the uplink data sent by the terminal on the first uplink channel, and determines whether the network device correctly receives the terminal in the first uplink channel according to a correlation value.
  • the uplink data sent on the uplink improves the detection success rate to a certain extent, and the coverage performance can be guaranteed. And determining, by using the first correlation value and the second correlation value, whether the network device correctly receives the uplink data sent by the terminal on the first uplink channel, and determining whether the network device correctly receives the terminal in the first uplink channel according to a correlation value.
  • the uplink data sent on the uplink can reduce the probability that the terminal that has a resource conflict incorrectly detects the ACK, thereby reducing the false alarm probability of the terminal that has the resource conflict to some extent.
  • the terminal may perform joint estimation detection by using the first correlation value and the second correlation value, and determine, according to the joint estimation detection result, whether the network device successfully receives the uplink data of the terminal on the first uplink channel. .
  • the terminal may perform joint estimation detection by using a difference between the first correlation value and the second correlation value; or may use the first correlation value and the first correlation value The ratio between the two correlation values is jointly estimated and detected; or the joint estimation detection may be performed using the sum of the absolute values of the first correlation value and the absolute value of the second correlation value.
  • a difference between the first correlation value and the second correlation value; or a ratio between the first correlation value and the second correlation value; or the first correlation value The value obtained by operating the first correlation value and the second correlation value on the sum of the absolute value of the absolute value and the absolute value of the second correlation value is referred to as a joint estimation detection value of the first correlation value and the second correlation value.
  • the implementation process of the joint estimation detection is performed by using the joint estimation detection value of the first correlation value and the second correlation value
  • the algorithm implementation of the joint estimation detection value involved above is not limited.
  • Other algorithm implementations are also possible.
  • a logical result obtained by comparing the first correlation value with the first threshold and a logical result obtained by comparing the second correlation value with the second threshold may be used as a joint estimation detection value.
  • the following describes an example in which the joint estimation detection value is the difference between the first correlation value and the second correlation value.
  • the terminal may perform a joint estimation detection process, and set a corresponding joint detection threshold for the first correlation value, the second correlation value, and the joint estimation detection value, by comparing the first correlation value, the second correlation value, and the joint estimation detection value, And determining, by the network device, whether the network device successfully receives the uplink data of the terminal on the first uplink channel.
  • the terminal may preset the first joint detection threshold corresponding to the first correlation value, and second. a second joint detection threshold corresponding to the correlation value, and a third joint detection threshold corresponding to the joint estimated detection value, by determining the first correlation value, the second correlation value, and the joint estimation detection value and the corresponding threshold value
  • the size determines whether the network device successfully receives the uplink data of the terminal on the first uplink channel.
  • the terminal may determine that the network device correctly receives the uplink data sent by the terminal on the first uplink channel. If the first correlation value is less than or equal to a preset first joint detection threshold, the second phase If the threshold value is greater than the preset second joint detection threshold, the joint estimated detection value of the first correlation value and the second correlation value is less than the set third joint detection threshold, the terminal may determine that the network device does not receive the network device correctly. The uplink data sent by the terminal on the first uplink channel. If the joint estimation detection value of the first correlation value and the second correlation value is less than the set third joint detection threshold, the terminal may determine that the network device does not correctly receive the uplink data sent by the terminal on the first uplink channel, and A terminal for resource conflicts.
  • the first sequence involved in the foregoing embodiment of the present application may be any one of a Golden sequence, an m sequence, and a ZC (Zadoff-Chu) sequence
  • the second sequence may also be a Golden sequence, an m sequence, and Any one of the ZC (Zadoff-Chu) sequences to achieve better performance for downlink feedback transmission.
  • the sixth sequence and the seventh sequence may be any one of a Golden sequence, an m sequence, and a ZC (Zadoff-Chu) sequence, respectively.
  • the Golden sequence is a pseudo-random binary sequence
  • the Golden sequence uses a real seed to generate a sequence of a desired length, and the elements of the sequence are 0 and 1.
  • the m sequence is also a pseudo-random binary sequence.
  • the length of the m-sequence is 2, the length of the power is minus 1, and the number of elements 0 and 1 in the m-sequence is different by 1. This property is not available in other pseudo-random sequences.
  • the ZC sequence is a complex-valued sequence.
  • the length of the ZC sequence can be set to the desired length.
  • Each ZC sequence has a root (root). Under the same root, there is a set of ZC sequences. Generally, root selects a prime number.
  • the Golden sequence can directly use the terminal identifier as a seed, which saves signaling overhead, and the m sequence and the ZC sequence require letters.
  • the mapping between the terminal and the sequence is completed by the overhead. Therefore, the sequence referred to in the above embodiment of the present application is a Golden sequence as an example.
  • each group of uplink channels includes uplink channels 0 to 5, and downlink feedback is performed on one downlink channel.
  • terminals 0 to 4 transmit uplink data using uplink channels 0 to 4
  • terminal 5 transmits uplink data using uplink channel 3
  • no terminal transmits uplink data on uplink channel 5.
  • the network device determines that the uplink data is correctly received on the uplink channels 0 to 3, and the uplink data is not correctly received on the uplink channels 4 to 5, and the uplink data received by the network device on the channel 3 is the uplink data sent by the terminal 3. .
  • Terminals 0 to 4 normally send uplink data, which can be called normal users.
  • the terminal 5 may not be normally transmitting data due to a resource conflict with the terminal 3 on the uplink channel 3, and may be referred to as a collision user.
  • the downlink feedback method in the foregoing embodiment of the present application is used, and the network device determines that the uplink data sent by the terminals 0 to 3 is correctly received for the uplink channels 0 to 3, and then determines that the first channel needs to be fed back to the uplink channel 0 to 3. sequence.
  • the first sequence may be determined according to the terminal identifiers corresponding to the terminals 0 to 3 for the uplink channels 0 to 3.
  • the Golden sequence is generated according to the identifiers of the terminals 0 to 3, respectively. .
  • the network device determines that the uplink data is not correctly received for the uplink channels 4 to 5, and determines that the second sequence needs to be fed back for the uplink channels 4 to 5.
  • the second sequence may be determined for the uplink channels 4 to 5 according to the uplink channel identifiers corresponding to the uplink channels 4 to 5, for example, according to the identifiers of the uplink channels 4 to 5, respectively. Generate a Golden sequence.
  • each of the Golden sequences corresponding to the uplink channels 0 to 5 may be sent through one downlink channel.
  • FIG. 5 is a schematic diagram of an implementation process of transmitting a sequence of multiple uplink channels through one downlink channel according to an embodiment of the present application.
  • the network device first modulates downlink feedback (first sequence or second sequence) of the uplink channels 0-5 to complete sequence mapping.
  • BPSK mapping may be used for BPSK mapping.
  • the first sequence may be obtained after the first sequence is obtained by combining the downlink feedback sequence (ACK) and the terminal identifier that correctly receive the uplink data.
  • Perform sequence mapping After the second sequence is obtained by combining the downlink feedback sequence (NACK) and the uplink channel identifier that do not correctly receive the uplink data, the second sequence is sequence mapped.
  • the first sequence or the second sequence generated by the network device according to the terminal identifier or the uplink channel identifier is a binary Golden sequence, and the binary Golden sequence may be a complex value sequence after performing BPSK mapping.
  • the network device may perform different phase rotations on the complex-valued sequence corresponding to the modulated first sequence and the complex-valued sequence corresponding to the modulated second sequence, or corresponding to the modulated first sequence.
  • the elements in the complex-valued sequence and the elements in the complex-valued sequence corresponding to the second sequence after modulation are XORed with different values to distinguish different terminals.
  • the complex value sequence obtained by the sequence mapping may be superimposed and normalized, and the superposed and normalized sequence may be superposed.
  • the resource mapping is performed to map to the location of the data RE, and the inverse inverse Fourier transform (IFFT) is performed, and the Cyclic Prefix (CP) is added, and the reference signal (Reference Signal, RS) is generated orthogonally.
  • IFFT inverse inverse Fourier transform
  • CP Cyclic Prefix
  • RS Reference Signal
  • An Orthogonal Frequency Division Multiplexing (OFDM) signal is transmitted to the terminal on the downlink channel. After receiving the OFDM signal sent by the network device, the terminal removes the CP, and performs fast Fourier transform (FFT), channel separation, channel estimation, equalization, etc., to obtain a complex value sequence obtained from the network device.
  • FFT fast Fourier transform
  • the terminals 0 to 5 respectively generate two Golden sequences (the sixth sequence and the seventh sequence) according to the respective terminal identifiers and the uplink channel identifiers corresponding to the uplink channels used for transmitting the uplink data. For example, for terminal 0, terminal 0 generates a Golden sequence (sixth sequence) using the identity of channel 0, and generates a Golden sequence (seventh sequence) using the identity of terminal 0. Terminals 0 to 5 respectively sequence the two locally generated golden sequences (the sixth sequence and the seventh sequence) with the complex value sequence (fifth sequence) obtained and processed from the network device, to obtain the first correlation value and The second correlation value.
  • Cor channel is a second correlation value obtained by correlation between the fifth sequence and the seventh sequence, and i is an integer within 0 to 11519.
  • the terminal may perform joint estimation detection according to the difference between the first correlation value and the second correlation value to determine whether the network device correctly receives the uplink data.
  • the terminal determines that the network device correctly receives uplink data on an uplink channel that the terminal sends uplink data. If the joint detection result is that the absolute value of the joint estimation detection value is greater than a preset third joint estimation detection threshold, and the real part of the first correlation value is smaller than the second joint detection threshold, then The terminal determines that the network device does not correctly receive uplink data on an uplink channel that the terminal sends uplink data.
  • the terminal determines that the network device does not correctly receive the uplink data on the uplink channel that the terminal sends the uplink data, and the terminal is in a resource conflict. Terminal.
  • the terminal performs a cumulative distribution function (CDF) of the difference between the first correlation value and the second correlation value according to the difference between the first correlation value and the second correlation value.
  • CDF cumulative distribution function
  • the sequence is determined for the first uplink channel, and is sent to the terminal during downlink feedback, so the terminal also advances It is determined that if there is no resource conflict with other terminals, the downlink feedback sent by the network device for the first uplink channel is inevitably received, that is, the first sequence or the second sequence is inevitably received, and resources are generated with other terminals. In the case of a conflict, neither the first sequence nor the second sequence is received, and the detection success rate for determining whether the network device correctly receives the uplink data can be improved to some extent.
  • the terminal determines, according to the two correlation values, whether the network device correctly receives the uplink data sent by the terminal on the first uplink channel, and determines whether the network device correctly receives the uplink data sent by the terminal on the first uplink channel according to a correlation value. To some extent, the detection success rate is improved. And the network device determines the first sequence based on the terminal identifier or determines the second sequence based on the first channel identifier, effectively reducing the false alarm probability of the collision user, effectively distinguishing resource conflicts, and ensuring coverage performance.
  • the solution provided by the embodiment of the present application is mainly introduced from the perspective of interaction between the terminal and the network device.
  • the terminal and the network device include corresponding hardware structures and/or software modules for performing the respective functions in order to implement the above functions.
  • the embodiments of the present application can be implemented in a combination of hardware or hardware and computer software in combination with the units (devices, devices) and algorithm steps of the examples described in the embodiments disclosed in the application. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the technical solutions of the embodiments of the present application.
  • the embodiments of the present application may divide the functional units (devices, devices) of the terminal and the network device according to the foregoing method.
  • each functional unit (device, device) may be divided according to each function, or two or more may be used.
  • the functions are integrated in one processing unit (device, device).
  • the above integrated units (devices, devices) can be implemented in the form of hardware or in the form of software functional units (devices, devices). It should be noted that the division of the unit (device, device) in the embodiment of the present application is schematic, and is only a logical function division, and the actual implementation may have another division manner.
  • FIG. 6 is a schematic structural diagram of a downlink feedback sending apparatus provided by an embodiment of the present application, where the downlink feedback sending apparatus is applicable to a network device.
  • the downlink feedback transmitting apparatus 100 includes a processing unit 101 and a transmitting unit 102.
  • the processing unit 101 is configured to determine whether uplink data is correctly received on the first uplink channel. If the processing unit 101 determines that the uplink data is correctly received, the processing unit 101 determines a first sequence, the first sequence is used to indicate that the network device correctly receives the uplink corresponding to the first terminal on the first uplink channel. Data, and the first sequence is a sequence determined according to the first terminal identity.
  • the transmitting unit 102 transmits the first sequence.
  • the processing unit 101 determines a second sequence, where the second sequence is used to indicate that the network device does not correctly receive uplink data on the first uplink channel, and The second sequence is a sequence determined according to the first uplink channel identifier, and the transmitting unit 102 transmits the second sequence.
  • the processing unit 101 determines the first sequence in the following manner:
  • the processing unit 101 determines the second sequence in the following manner:
  • the sending unit 102 sends the first sequence in the following manner:
  • the processing unit 101 And transmitting, on the first downlink channel, a sequence obtained by performing a second processing on the fourth sequence set, where the fourth sequence set includes a sequence obtained by performing first processing on the first sequence, and The sequence obtained after the first processing by the at least one third sequence, the at least one third sequence is determined by the processing unit 101 for each of the at least one second uplink channel.
  • the sending unit 102 sends the second sequence in the following manner:
  • the first processing includes modulating the sequence and performing an exclusive OR operation or a phase adjustment on the modulated sequence.
  • the sending unit 102 performs a first process on the first sequence by modulating the first sequence, and performing an exclusive OR of each element in the first sequence obtained after the modulation with the first value.
  • the operation or the first phase obtained after the modulation is subjected to the first phase rotation.
  • the sending unit 102 performs a first process on the second sequence by performing modulation on the second sequence, and performing an exclusive OR operation on each element in the second sequence obtained after the modulation and the second value.
  • the second phase of the modulated second phase is rotated.
  • the first value is different from the second value and is one of 0 and 1; the first phase is different from the second phase.
  • the third sequence is according to the second terminal identifier. Determined sequence. If the processing unit 101 determines that uplink data is not correctly received on the second uplink channel, the third sequence is a sequence determined according to the second uplink channel identifier.
  • the first sequence is any one of a Golden sequence, an m sequence, and a ZC sequence
  • the second sequence is any one of a Golden sequence, an m sequence, and a ZC sequence.
  • the second process includes at least one of modulation, phase rotation, superposition, and normalization processing.
  • the processing unit 101 may be a processor or a controller.
  • the transmitting unit 102 can be a communication interface, a transceiver, a transceiver circuit, or the like.
  • the communication interface is a collective name and may include one or more interfaces.
  • the downlink feedback sending apparatus 100 When the processing unit 101 is a processor and the sending unit 102 is a transceiver, the downlink feedback sending apparatus 100 according to the embodiment of the present application may be the downlink feedback sending apparatus shown in FIG. 7, and the downlink feedback sending apparatus shown in FIG. 7 may be a network.
  • a device such as a base station.
  • FIG. 7 is a schematic structural diagram of a network device 1000 according to an embodiment of the present application, that is, another structure diagram of the downlink feedback sending apparatus 100.
  • the network device 1000 includes a processor 1001 and a transceiver 1002.
  • the processor 1001 can also be a controller.
  • the processor 1001 is configured to support a network device to perform the functions involved in FIG.
  • the transceiver 1002 is configured to support a function of a network device to send and receive messages.
  • the network device can also include a memory 1003 for coupling with the processor 1001 that retains the program instructions and data necessary for the network device.
  • the processor 1001, the transceiver 1002 and the memory 1003 are connected to each other.
  • the memory 1003 is configured to store an instruction
  • the processor 1001 is configured to execute the instruction stored in the memory 1003 to control the transceiver 1002 to send and receive signals, and complete the network device in the foregoing method. The steps to perform the corresponding function.
  • FIG. 8 is a schematic structural diagram of a downlink feedback receiving apparatus provided by an embodiment of the present application, and the downlink feedback receiving apparatus is applicable to a terminal.
  • the downlink feedback receiving apparatus 200 includes a receiving unit 201 and a processing unit 202.
  • the receiving unit 201 is configured to receive a fifth sequence from the network device.
  • the processing unit 202 is configured to determine, according to the fifth sequence received by the receiving unit 201, a first correlation value and a second correlation value, and determine, according to the first correlation value and the second correlation value, whether the network device correctly receives the The uplink data sent by the terminal on the first uplink channel.
  • the first correlation value is obtained by the third processing of the fifth sequence and the sixth sequence, and the second correlation value is obtained by the fourth processing of the fifth sequence and the seventh sequence;
  • the sixth sequence is a sequence determined according to the terminal identifier, and the seventh sequence is a sequence determined according to the first uplink channel identifier.
  • the sixth sequence is any one of a Golden sequence, an m sequence and a ZC sequence
  • the seventh sequence is any one of a Golden sequence, an m sequence and a ZC sequence.
  • the third processing and/or the fourth processing includes a related computing operation.
  • the processing unit 202 determines, according to the first correlation value and the second correlation value, whether the network device correctly receives the uplink data sent by the terminal on the first uplink channel:
  • the processing unit 202 may perform joint estimation detection by using a difference between the first correlation value and the second correlation value; or may perform joint estimation detection by using a ratio between the first correlation value and the second correlation value. Or jointly estimated detection may be performed using a sum of an absolute value of the first correlation value and an absolute value of the second correlation value.
  • the receiving unit 201 may be a communication interface, a receiver, a receiving circuit, or the like.
  • Processing unit 202 can be a processor or controller.
  • the communication interface is a collective name and may include one or more interfaces.
  • the downlink feedback receiving apparatus 200 When the receiving unit 201 is a receiver and the processing unit 202 is a processor, the downlink feedback receiving apparatus 200 according to the embodiment of the present application may be the downlink feedback receiving apparatus shown in FIG. 9, and the downlink feedback receiving apparatus shown in FIG.
  • the device can be a terminal.
  • FIG. 9 is a schematic structural diagram of a terminal 2000 according to an embodiment of the present application, that is, another possible structure diagram of the downlink feedback receiving apparatus 200 is shown.
  • the terminal 2000 includes a processor 2001, a transmitter 2002, and a receiver 2003.
  • the processor 2001 can also be a controller.
  • the processor 2001 is configured to support a terminal to perform the functions of the terminal involved in FIG.
  • the transmitter 2002 and the receiver 2003 are configured to support a function of transceiving messages between the terminal 2000 and the network device.
  • the terminal 2000 can also include a memory 2004 for coupling with the processor 2001 that holds the necessary program instructions and data for the terminal 2000.
  • the processor 2001, the transmitter 2002, the receiver 2003 and the memory 2004 are connected, the memory 2004 is for storing instructions for executing the instructions stored by the memory 2004 to control the transmitter 2002 and the receiver 2003 to transmit and receive.
  • the signal completes the steps of the terminal performing the corresponding function in the above method.
  • the terminal 2000 may further include an antenna 2005.
  • the network device and the terminal are not limited to the above structure, and may further include, for example, an antenna array, a duplexer, and a baseband processing section.
  • the duplexer of the network device is used to implement an antenna array, which is used for both transmitting signals and receiving signals.
  • the transmitter is used to convert between the RF signal and the baseband signal.
  • the transmitter can include a power amplifier, a digital-to-analog converter and a frequency converter.
  • the receiver can include a low noise amplifier, an analog to digital converter and a frequency converter. Among them, the receiver and the transmitter can sometimes also be collectively referred to as a transceiver.
  • the baseband processing section is used to implement processing of transmitted or received signals, such as layer mapping, precoding, modulation/demodulation, encoding/decoding, etc., and for physical control channels, physical data channels, physical broadcast channels, reference signals, etc. Perform separate processing.
  • the terminal may further include a display device, an input/output interface, and the like.
  • the terminal may have a single antenna or multiple antennas (ie, an antenna array).
  • the duplexer of the terminal is used to implement the antenna array for both transmitting signals and receiving signals.
  • the transmitter is used to convert between the RF signal and the baseband signal.
  • the transmitter can include a power amplifier, a digital-to-analog converter and a frequency converter.
  • the receiver can include a low noise amplifier, an analog to digital converter and a frequency converter.
  • the baseband processing section is used to implement processing of transmitted or received signals, such as layer mapping, precoding, modulation/demodulation, encoding/decoding, etc., and for physical control channels, physical data channels, physical broadcast channels, reference signals, etc. Perform separate processing.
  • the terminal may further include a control part, configured to request an uplink physical resource, calculate channel state information (CSI) corresponding to the downlink channel, determine whether the downlink data packet is successfully received, or the like.
  • CSI channel state information
  • the processor involved in the foregoing embodiments may be a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), and an application specific integrated circuit (Application-Specific). Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor can also be a combination of computing functions, for example including one or Multiple microprocessor combinations, a combination of DSP and microprocessor, and more.
  • the memory may be integrated in the processor or may be separately provided from the processor.
  • the functions of the receiver and the transmitter can be implemented by a dedicated chip through the transceiver circuit or the transceiver.
  • the processor can be implemented by a dedicated processing chip, a processing circuit, a processor, or a general purpose chip.
  • program code that implements processor, receiver, and transmitter functions is stored in a memory that implements the functions of the processor, receiver, and transmitter by executing code in memory.
  • the embodiment of the present application further provides a communication system, including the foregoing network device and one or more terminals.
  • the embodiment of the present application further provides a computer storage medium for storing some instructions. When the instructions are executed, any method involved in the foregoing terminal or network device may be completed.
  • the embodiment of the present application further provides a computer program product for storing a computer program, which is used to execute a method for scheduling an MF system information block involved in the foregoing method embodiment.
  • embodiments of the present application can be provided as a method, system, or computer program product. Therefore, the embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Moreover, embodiments of the present application 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, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG.
  • These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device.
  • 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.

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Abstract

一种下行反馈发送、接收方法及装置，以在保证覆盖性能的基础上有效区分资源冲突。在该方法中，网络设备确定在第一上行信道上是否正确接收到终端发送的上行数据，若确定在上行信道上正确接收到终端发送的上行数据，则确定并发送根据终端标识确定的序列，若确定在上行信道上未正确接收到终端发送的上行数据，则确定并发送根据该上行信道标识确定的序列。终端根据终端标识确定序列，根据上行信道标识确定序列，并对确定的两个序列和从网络设备接收的序列进行处理得到第一相关值和第二相关值。终端根据第一相关值和第二相关值，确定网络设备是否正确接收到终端在第一上行信道上发送的上行数据。

Description

下行反馈发送、接收方法及装置 技术领域
本申请涉及通信技术领域，尤其涉及一种下行反馈发送、接收方法及装置。
背景技术
面对物联网通信低成本、低功耗、易部署和免维护的需求，现有技术有工作在授权频谱上的物联网系统，例如窄带物联网(Narrow Band Internet of Things，NB-IOT)和增强型机器通信(enhanced Machine Type Communications，eMTC)等，而在企业级物联网通信中，免授权频谱上的窄带通信系统更具有成本优势。
工作在免授权频谱上的企业级物联网在进行通信过程中，由于在免授权频谱上的法规要求，通信系统的上行资源分配使用无集中调度的Slot Aloha模式，也因此带来了问题。在没有物理下行控制信道(Physical Downlink Control Channel，PDCCH)时，终端采用基于竞争的传输方式在上行信道上发送上行数据，例如多个终端可能选择在同一个物理上行链路共享信道(Physical Uplink Shared Channel，PUSCH)中发送上行数据，故多个终端在同一PUSCH发送上行数据过程中可能会出现冲突和碰撞。终端在PUSCH发送上行数据后，需要在对应的下行物理混合自动重传请求指示信道(Physical HARQ Indication Channel，PHICH)接收上行数据的下行反馈。目前，对于基于竞争方式传输的上行数据的下行反馈主要有基于信道和基于终端的两种反馈策略。
基于信道的下行反馈策略，网络设备(例如基站)在一个上行信道上，如果确定正确接收到上行数据，则反馈正确应答指令(Acknowledgement，ACK)，该ACK使用1个比特位1来表示，相反，如果网络设备确定未正确接收到上行数据，则反馈错误应答指令(Negative AcKnowledge，NACK)，NACK用1个比特位0表示，终端通过检测比特位0或1来获得反馈结果。图1所示为基于信道的下行反馈方法实施流程图。网络设备侧主要包括比特级处理和符号级处理。其中，比特级处理过程中，一个下行信道中可配置需要反馈的PHICH比特数n，对PHICH进行信道编码(例如正反码)后，进行重复和加扰处理。符号级处理过程中，PHICH固定使用二进制相移键控(Binary Phase Shift Keying，BPSK)调制方式进行调制，并将加扰后的结果映射到比特数据的资源元素(Resource Element，RE)位置上，最后生成OFDM(正交频分复用)符号在空口发送。网络设备通过空口信道将处理后的PHICH发送给终端，终端在读取PHICH时，需要进行与网络设备相逆的过程，即分别进行符号级处理和比特级处理，最终得到PHICH。基于信道的下行反馈的优势是可以将比特信息进行信道编码，并且资源可重复，故能获得较好的覆盖性能，缺点是不能区分资源冲突的情况，假如两个终端同时在一个上行信道内发送上行数据，网络设备正确解析到一个终端发送的上行数据并发送了表征ACK的1个比特位1，被碰撞的终端会误以为是自己的ACK，导致无线链路控制(Radio Link Control，RLC)数据包的重传，增大终端的功耗。
基于终端的下行反馈策略，网络设备在一个上行信道上，如果确定正确接收了上行数据，则发送一个与该终端标识(Identify，ID)相关的序列，终端通过检测该与终端标识相关的序列来获得反馈结果。图2所示为基于终端的下行反馈方法实施流程图。参阅图2所示，对于上行数据被网络设备正确接收的每个终端，网络设备按照终端的ID生成二进制伪 随机序列，并将二进制伪随机序列进行BPSK映射为复数值序列，在终端间做相位旋转以区分不同的终端，将生成好的复数值序列叠加并进行归一化处理后，将归一化后的序列映射到数据RE位置，并进行快速傅立叶反变换(Inverse Fast Fourier transform，IFFT)，并附加循环前缀(Cyclic Prefix，CP)后，映射参考信号(Reference Signal，RS)生成正交频分复用(Orthogonal Frequency Division Multiplexing，OFDM)信号在下行信道上向终端发送。终端接收到网络设备发送的OFDM信号以后去除CP，并进行快速傅立叶变换(Fast Fourier transform，FFT)以及解映射处理，利用参考信号位置的接收信号和本地参考信号完成信道估计和数据信号位置的均衡。终端根据终端ID，生成本地复数序列，并将均衡后的接收信号与本地生成的复数序列进行相关值计算，根据相关值以及门限值，确定反馈结果，其中，相关值超过门限为ACK，否则为NACK。基于终端的下行反馈，网络设备只对正确接收到上行数据的终端发送与终端ID相关的序列，进而能够避免资源发生冲突的终端误检。但是在极低信噪比情况下，正常发送上行数据的终端的自相关值和发生资源冲突的终端的互相关值区分度差，如果门限值设置的过低，发生资源冲突的终端容易错检出ACK，造成发生资源冲突终端的虚警概率较高，如果门限值设置的过高，则正常发送上行数据的终端的漏检概率会较高。为了改善上述情况，只能提高信噪比，然而提高信噪比会导致覆盖性能差。
发明内容
本申请实施例提供一种下行反馈发送、接收方法及装置，以既能保证覆盖性能又能有效的区分资源冲突。
第一方面，提供一种下行反馈发送方法，在该下行反馈发送方法中，网络设备确定在上行信道上是否正确接收到终端发送的上行数据。网络设备若确定在上行信道上正确接收到终端发送的上行数据，则根据终端标识确定序列，并发送该根据终端标识确的序列。网络设备若确定在上行信道上未正确接收到终端发送的上行数据，则根据上行信道标识确定序列，并发送该根据上行信道标识确定的序列。
本申请实施例中，通过上述下行反馈发送方法，使得无论网络设备是否在上行信道上正确接收到上行数据，均会针对该上行信道确定序列(根据终端标识确定的序列或根据上行信道标识确定的序列)，并在下行反馈时发送给终端，故终端也会预先确定，若未与其他终端发生资源冲突情况下，必然会接收到网络设备发送的针对该上行信道的下行反馈，即必然会收到网络设备反馈的序列，若与其他终端发生资源冲突，则既不会接收到根据终端标识确定的序列也不会接收到根据上行信道标识确定的序列，进而可在一定程度上提高确定网络设备是否正确接收到上行数据的检测成功率。
其中，网络设备在确定在上行信道上正确接收到上行数据情况下，根据终端标识生成的序列可称为第一序列，所述第一序列用于表征所述网络设备在所述第一上行信道上正确接收到对应于第一终端的上行数据，且所述第一序列为根据所述第一终端标识确定的序列。网络设备在确定在上行信道上未正确接收到上行数据情况下，根据上行信道标识生成的序列可称为第二序列，所述第二序列用于表征所述网络设备在所述第一上行信道上未正确接收到上行数据，且所述第二序列为根据所述第一上行信道标识确定的序列。
一种可能的实施方式中，网络设备可基于终端标识和表征第一序列发送时间的时间参数，生成第一序列。其中，表征第一序列发送时间的时间参数可以是子帧序号、帧序号、 超帧序号等。网络设备还可依据终端标识与第一序列之间的映射关系，在第一序列集合中获取第一序列。网络设备也可根据第一索引信息，在第一序列集合中获取第一序列。其中，第一索引信息与第一序列、终端标识之间具有对应关系。其中，所述映射关系可以是预设的。
网络设备可基于上行信道标识和表征第二序列发送时间的时间参数，生成第二序列。其中，表征第二序列发送时间的时间参数可以是子帧序号、帧序号、超帧序号等。网络设备还可依据上行信道标识与第二序列之间的预设映射关系，在第二序列集合中获取第二序列。网络设备也可根据第二索引信息，在第二序列集合中获取第二序列。其中，第二索引信息与第二序列、上行信道标识之间具有对应关系。
又一种可能的实施方式中，网络设备确定需要发送第一序列情况下，可在下行信道上发送第一序列。网络设备还可对第一序列进行处理，在下行信道发送对第一序列进行处理后的序列。网络设备确定需要发送第二序列情况下，可在下行信道上发送第二序列。网络设备还可对第二序列进行处理，在下行信道发送对第二序列进行处理后的序列。
其中，网络设备若确定需要发送第一序列，则可对第一序列进行调制，并对调制后的第一序列中每一元素与第一数据进行异或运算。网络设备若确定需要发送第二序列，则可对第二序列进行调制，将调制后得到的第二序列中每一元素与第二数值进行异或运算。其中，所述第一数值与所述第二数值不同，且为0和1中的一个。
其中，网络设备若确定需要发送第一序列，则可对第一序列进行调制，并对调制后的第一序列进行第一相位旋转。网络设备若确定需要发送第二序列，则可对第二序列进行调制，并将调制后的第二序列进行第二相位旋转。其中，所述第一相位与所述第二相位不同。
本申请实施例中通过上述对序列进行调制，并对调制后的序列进行异或运算或相位调整，可使第一序列和第二序列进行调制后，映射到不同的星座点，并在叠加后具备更好的峰均比。
又一种可能的实施方式中，网络设备若确定需要发送第一序列，可将多个上行信道的第一序列，进行处理后叠加在一个下行信道发送，以节省信道资源。其中，网络设备对多个上行信道的第一序列的处理过程可包括调制、相位旋转、叠加以及归一化处理中的至少一个。其中，多个上行信道包括第一上行信道和至少一个第二上行信道，第一终端在第一上行信道上向网络设备发送上行数据，网络设备针对第一上行信道确定第一序列，并在第一下行信道发送第一序列。第二终端在第二上行信道上向网络设备发送上行数据，网络设备针对第二上行信道确定第三序列。网络设备可采用如下方式之一发送第一序列：
网络设备在第一下行信道发送第一序列；或者网络设备在第一下行信道上发送对所述第一序列进行第一处理后得到的序列；或者网络设备在第一下行信道上发送对所述第一序列与至少一个第三序列进行第二处理后得到的序列；其中，所述至少一个第三序列是所述网络设备分别针对至少一个第二上行信道确定的；或者网络设备在第一下行信道上，发送对第四序列集合进行第二处理后得到的序列；其中，所述第四序列集合中包括对所述第一序列进行第一处理后得到的序列，以及对至少一个第三序列进行第一处理后得到的序列，至少一个第三序列是网络设备分别针对至少一个第二上行信道确定的。
网络设备若确定需要发送第二序列，可将多个上行信道的第二序列，进行处理后叠加在一个下行信道发送，以节省信道资源。其中，网络设备对多个上行信道的第二序列的处理过程可包括调制、相位旋转、叠加以及归一化处理中的至少一个。其中，多个上行信道 包括第一上行信道和至少一个第二上行信道，第一终端在第一上行信道上向网络设备发送上行数据，网络设备针对第一上行信道确定第二序列，并在第一下行信道发送第二序列。第二终端在第二上行信道上向网络设备发送上行数据，网络设备针对第二上行信道确定第三序列。网络设备可采用如下方式之一发送第二序列：
网络设备在第一下行信道上，发送第二序列；或者网络设备在第一下行信道上，发送对第二序列进行第一处理后得到的序列；或者网络设备在第一下行信道上，发送对第二序列与至少一个第三序列进行第二处理后得到的序列，至少一个第三序列是网络设备分别针对至少一个第二上行信道确定的；或者网络设备在第一下行信道上，发送对第四序列集合进行第二处理后得到的序列，其中，第四序列集合中包括对第二序列进行第一处理后得到的序列，以及对至少一个第三序列进行第一处理后得到的序列，至少一个第三序列是网络设备分别针对至少一个第二上行信道确定的。
本申请实施例中通过将多个上行信道的序列进行处理后叠加在一个下行信道发送，可节省信道资源。
又一种可能的实施方式中，所述第一序列可为Golden序列、m序列和ZC(Zadoff-Chu)序列中的任意一种，或者，所述第二序列也可为Golden序列、m序列和ZC(Zadoff-Chu)序列中的任意一种，以使下行反馈发送达到较好的性能。其中，Golden序列由于可以直接使用终端标识作为种子，节省了信令开销。
第二方面，提供一种下行反馈接收方法，在该下行反馈接收方法中，终端从网络设备处接收第五序列。其中，该第五序列可以理解为是网络设备发送的第一序列或第二序列经过处理以及添加了噪声的序列。终端根据接收的第五序列确定第一相关值和第二相关值，根据第一相关值和第二相关值，确定网络设备是否正确接收到所述终端在第一上行信道上发送的上行数据。
本申请实施例中终端根据两个相关值，确定网络设备是否正确接收到终端在第一上行信道上发送的上行数据，相比根据一个相关值确定网络设备是否正确接收到终端在第一上行信道上发送的上行数据，一定程度上提高了检测成功率。
一种可能的实施方式中，终端可根据终端标识在本地确定第六序列，对第五序列和第六序列进行处理得到第一相关值，并根据发送上行数据的上行信道的上行信道标识确定第七序列，对第五序列和第七序列进行处理得到第二相关值。
本申请实施例中，终端根据终端标识和上行信道标识生成第六序列和第七序列，并与第五序列进行相关操作，得到第一相关值和第二相关值，利用第一相关值和第二相关值，确定网络设备是否正确接收到终端在第一上行信道上发送的上行数据，相比根据一个相关值确定网络设备是否正确接收到终端在第一上行信道上发送的上行数据，能够降低发生资源冲突的终端错检出ACK的概率，进而一定程度上降低了发生资源冲突终端的虚警概率，有效区分资源冲突。并且，可提高正常发送上行数据的终端的检测成功率，保证覆盖性能。
一种可能的示例中，终端可利用第一相关值和第二相关值，进行联合估计检测，并根据所述联合估计检测结果，确定所述网络设备是否成功接收到所述终端在第一上行信道上的上行数据。
终端进行联合估计检测过程中，可利用第一相关值和第二相关值的联合估计检测值进行联合估计检测。
其中，所述联合估计检测值可包括：所述第一相关值和第二相关值之间的差值；或所 述第一相关值和第二相关值之间的比值；或所述第一相关值的绝对值和所述第二相关值的绝对值之和。
其中，终端进行联合估计检测过程中，可为第一相关值、第二相关值以及联合估计检测值设置对应的联合检测门限，通过比较第一相关值、第二相关值以及联合估计检测值，与各自对应的联合检测门限值的大小，确定网络设备是否成功接收到所述终端在第一上行信道上的上行数据。
其中，若第一相关值大于预设的第一联合检测门限值，第二相关值小于等于预设的第二联合检测门限值，第一相关值和第二相关值的联合估计检测值小于设定的第三联合检测门限值，则终端可确定网络设备正确接收到终端在第一上行信道上发送的上行数据。若第一相关值小于等于预设的第一联合检测门限值，第二相关值大于预设的第二联合检测门限值，第一相关值和第二相关值的联合估计检测值小于设定的第三联合检测门限值，则终端可确定网络设备未正确接收到终端在第一上行信道上发送的上行数据。若第一相关值和第二相关值的联合估计检测值小于设定的第三联合检测门限值，则终端可确定网络设备未正确接收到终端在第一上行信道上发送的上行数据，且为发生资源冲突的终端。
又一种可能的设计中，第六序列可为Golden序列、m序列和ZC(Zadoff-Chu)序列中的任意一种，第七序列也可为Golden序列、m序列和ZC(Zadoff-Chu)序列中的任意一种，以使下行反馈接收达到较好的性能。其中，Golden序列由于可以直接使用终端标识作为种子，节省了信令开销。
第三方面，提供一种下行反馈发送装置，该下行反馈发送装置具备实现上述第一方面涉及的网络设备功能，所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。所述模块可以是软件和/或硬件。
一种可能的设计中，下行反馈发送装置包括处理单元和发送单元，发送单元和处理单元执行的功能可以和各方法步骤相对应，在此不予赘述。
第四方面，提供一种网络设备，该网络设备包括处理器、收发器，还可以包括存储器。所述存储器用于与处理器耦合，其保存网络设备必要的程序指令和数据。其中，处理器、收发器和存储器相连，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，以控制收发器收发信号，完成上述第一方面以及第一方面任意可能的设计中网络设备的执行方法。
第五方面，提供一种下行反馈接收装置，该下行反馈接收装置具备实现上述第二方面涉及的终端功能，所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。所述模块可以是软件和/或硬件。
一种可能的设计中，下行反馈接收装置包括接收单元和处理单元，接收单元和处理单元的功能可以和各方法步骤相对应，在此不予赘述。
第六方面，提供一种终端，该终端包括处理器、发射器和接收器，还可以包括存储器，所述存储器用于与所述处理器耦合，其保存终端必要的程序指令和数据。处理器执行存储器存储的指令，执行上述第一方面以及上述第一方面任意可能的设计中的终端的功能。
一种可能的设计中，终端还可包括天线。
第七方面，提供一种通信系统，其包括第四方面涉及的网络设备、和一个或多于一个第六方面涉及的终端。
第八方面，提供一种计算机存储介质，用于存储一些指令，这些指令被执行时，可以完成第一方面以及上述第一方面任意可能的设计中的网络设备所涉及的任意一种方法，或可以完成第二方面以及上述第二方面任意可能设计中的终端所涉及的任意一种方法。
第八方面，提供一种计算机程序产品，用于存储计算机程序，该计算机程序用于执行完成第一方面以及上述第一方面任意可能的设计中的网络设备所涉及的任意一种方法，或可以完成第二方面以及上述第二方面任意可能设计中的终端所涉及的任意一种方法。
本申请实施例提供的下行反馈发送、接收方法及装置，无论网络设备是否在上行信道上正确接收到上行数据，均会针对该第一上行信道确定序列，并在下行反馈时发送给终端，故终端也会预先确定，若未与其他终端发生资源冲突情况下，必然会接收到网络设备发送的针对该第一上行信道的下行反馈，即必然会收到第一序列或第二序列，若与其他终端发生资源冲突，则既不会接收到第一序列也不会接收到第二序列，进而可在一定程度上提高确定网络设备是否正确接收到上行数据的检测成功率。终端根据两个相关值，确定网络设备是否正确接收到终端在第一上行信道上发送的上行数据，相比根据一个相关值确定网络设备是否正确接收到终端在第一上行信道上发送的上行数据，一定程度上提高了检测成功率。并且网络设备基于终端标识确定第一序列或基于第一信道标识确定第二序列，有效降低了碰撞用户的虚警概率，有效区分资源冲突，并可保证覆盖性能。
附图说明
图1为现有技术中基于信道的下行反馈方法实施流程图；
图2为现有技术中基于终端的下行反馈方法实施流程图；
图3为本申请实施例应用的系统架构图；
图4为本申请实施例提供的下行反馈方法实施流程图；
图5为本申请实施例提供的下行反馈方法另一实施流程图；
图6为本申请实施例提供的下行反馈发送装置一种结构示意图；
图7为本申请实施例提供的下行反馈发送装置另一种结构示意图；
图8为本申请实施例提供的下行反馈接收装置一种结构示意图；
图9为本申请实施例提供的下行反馈接收装置另一种结构示意图。
具体实施方式
下面将结合附图，对本申请实施例进行描述。
首先，对本申请中的部分用语进行解释说明，以便于本领域技术人员理解。
1)、网络设备，可以称之为无线接入网(Radio Access Network，RAN)设备，是一种将终端接入到无线网络的设备，包括但不限于：演进型节点B(evolved Node B，eNB)、无线网络控制器(Radio Network Controller，RNC)、节点B(Node B，NB)、基站控制器(Base Station Controller，BSC)、基站收发台(Base Transceiver Station，BTS)、家庭基站(例如，Home evolved NodeB，或Home Node B，HNB)、基带单元(Base Band Unit，BBU)、无线保真(Wireless Fidelity，WIFI)接入点(Access Point，AP)，传输点(transmission and receiver point，TRP或者transmission point，TP)、继续演进的节点B(gNB)等。
2)、终端，是一种向用户提供语音和/或数据连通性的设备，可以包括各种具有无线 通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其它处理设备，以及各种形式的用户设备(User Equipment，UE)，移动台(Mobile station，MS)，终端设备(Terminal Equipment)，传输点(transmission and receiver point，TRP或者transmission point，TP)等等。
3)、交互，本申请中的交互是指交互双方彼此向对方传递信息的过程，这里传递的信息可以相同，也可以不同。例如，交互双方为基站1和基站2，可以是基站1向基站2请求信息，基站2向基站1提供基站1请求的信息。当然，也可以基站1和基站2彼此向对方请求信息，这里请求的信息可以相同，也可以不同。
4)、“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。
本申请实施例提供的下行反馈发送、接收方法可应用于免授权频谱上，例如图3所示的企业级物联网通信系统，企业级物联网通信系统是一种部署在免授权频频谱上的无线通信系统，例如窄带物联网通信系统。图3所示的企业级物联网通信系统中，终端通过诸如基站等网络设备接入到网络中，网络设备与核心网完成数据的回传和前向传递。其中，终端与网络设备之间通过空口进行通信与交互。另外，也可以应用于授权频谱上。
终端在通过空口向网络设备发送上行数据时，通常采用基于竞争的传输方式在上行信道上发送上行数据，故多个终端发送上行数据过程中可能会出现资源冲突。终端发送上行数据后，网络设备需要向终端发送表征是否正确接收到终端发送的上行数据的下行反馈，终端接收终端发送的下行反馈。然而，目前的下行反馈方法中，不能在保证有效区分资源冲突的基础上保证覆盖性能。
可以理解的是，本申请实施例中的方案还可以应用于其他无线通信网络中，例如可应用于未来5G新无线(New Radio，NR)的上行免授权(UL grant free)或者上行授权的资源冲突场景中。
本申请实施例提供一种下行反馈方法，以既能保证覆盖性又能有效的区分资源冲突。
图4为本申请实施例提供的下行反馈方法实施流程图，参阅图4所示，包括：
S101：网络设备确定在上行信道上是否正确接收到上行数据。
本申请实施例中终端在上行信道上发送上行数据后，网络设备可通过在上行信道上是否正确解析到终端发送的上行数据，确定是否正确接收到上行数据。其中，网络设备若解析到终端发送的上行数据，则确定正确接收到终端发送的上行数据。网络设备若未解析到终端发送的上行数据，则确定未正确接收到终端发送的上行数据。
S102：网络设备针对上行信道确定序列。
本申请实施例中，网络设备若确定在上行信道上正确接收到对应于某一终端的上行数据，则针对在该上行信道上发送上行数据的终端，根据终端标识确定序列。网络设备若确定在上行信道上未正确接收到上行数据，则针对该上行信道根据该上行信道标识确定序列。
其中，终端标识可以是国际移动用户识别码(International Mobile Subscriber Identification Number，IMSI)，国际移动设备识别码(International Mobile Equipment Identity，IMEI)、携带软件版本号的国际移动设备识别码(IMEI and Software Version Number，IMEISV)、SAE临时移动标识(SAE Temporary Mobile Station Identifier，S-TMSI)、 全球唯一临时标识(globally unique temporary identifier，GUTI)、无线网络临时标识符(Radio Network Temporary Identity，RNTI)、随机接入无线网络临时标识符(Random Access RNTI，RA-RNTI)、小区无线网络临时标识符(Cell RNTI，C-RNTI)、临时小区无线网络临时标识符(Temporary-Cell RNTI，T-CRNTI)、半静态调度无线网络临时标识符(Semi-Persistent Scheduling RNTI，SPS RNTI)、寻呼无线网络临时标识符(Paging RNTI，P-RNTI)、系统信息无线网络临时标识符(System information RNTI，SI-RNTI)等中的任意一个或多个用于标识终端的标识信息。
其中，上行信道标识可以理解为是通信系统中的上行信道索引等用于标识上行信道的信息。
可以理解的是，本申请实施例中，无论网络设备是否在上行信道上正确接收到上行数据，均会针对该上行信道确定序列。
本申请实施例为描述方便，将网络设备在确定在上行信道上正确接收到上行数据情况下，根据终端标识确定的序列称为第一序列，所述第一序列用于表征所述网络设备在所述第一上行信道上正确接收到对应于第一终端的上行数据，且所述第一序列为根据所述第一终端标识确定的序列。将网络设备在确定在上行信道上未正确接收到上行数据情况下，根据上行信道标识确定的序列称为第二序列，所述第二序列用于表征所述网络设备在所述第一上行信道上未正确接收到上行数据，且所述第二序列为根据所述第一上行信道标识确定的序列。
本申请实施例中网络设备可单独依据终端标识确定第一序列，也可结合终端标识以及其它信息确定第一序列。
一种可能的示例中，网络设备可采用如下方式之一针对上行信道确定第一序列：
A：网络设备基于终端标识和表征第一序列发送时间的时间参数，生成第一序列。其中，表征第一序列发送时间的时间参数可以是子帧序号、帧序号、超帧序号等。
一种可能的示例中，本申请实施例中网络设备在确定在上行信道上正确接收了终端发送的上行数据后，确定需要针对该上行信道确定第一序列，则可根据发送该上行数据的终端的标识，以及发送第一序列所在子帧的子帧序号，针对该上行信道生成第一序列。
B：网络设备依据终端标识与第一序列之间的映射关系，在第一序列集合中获取第一序列，所述映射关系可以是预设的。
一种可能的示例中，本申请实施例中可预设第一序列集合，以及终端标识和第一序列之间的映射关系，网络设备在确定在上行信道上正确接收了终端发送的上行数据后，确定需要针对该上行信道确定第一序列，则可依据终端标识与第一序列之间的预设映射关系，在第一序列集合中获取第一序列。
C：网络设备根据第一索引信息，在第一序列集合中获取第一序列。其中，第一索引信息与第一序列、终端标识之间具有对应关系。
一种可能的示例中，本申请实施例可为终端标识以及与其对应的第一序列设置第一索引信息，网络设备确定在上行信道上正确接收了终端发送的上行数据后，确定需要针对该上行信道确定第一序列，则可依据终端标识确定对应的第一索引信息，然后依据第一索引信息，在第一序列集合中获取第一序列。
类似的，网络设备可单独依据上行信道标识确定第二序列，也可结合上行信道标识以及其它信息确定第二序列，例如可采用如下方式之一针对上行信道确定第二序列：
A：基于上行信道标识和表征第二序列发送时间的时间参数，生成第二序列。其中，表征第二序列发送时间的时间参数可以是子帧序号、帧序号、超帧序号等。
B：依据上行信道标识与第二序列之间的映射关系，在第二序列集合中获取第二序列，所述映射关系可以是预设的。
C：根据第二索引信息，在第二序列集合中获取第二序列。其中，第二索引信息与第二序列、上行信道标识之间具有对应关系。
S103：网络设备若确定在上行信道上正确接收到上行数据，则发送第一序列。网络设备若确定在上行信道上未正确接收到上行数据，则发送第二序列。
本申请实施例中，网络设备确定需要发送第一序列情况下，可在下行信道上发送第一序列。网络设备确定需要发送第二序列情况下，可在下行信道上发送第二序列。网络设备还可对第二序列进行处理，在下行信道发送对第二序列进行处理后的序列。
一种可能的示例中，网络设备确定需要发送第一序列情况下，可对第一序列进行处理，在下行信道发送对第一序列进行处理后的序列。网络设备确定需要发送第二序列情况下，可对第二序列进行处理，在下行信道发送对第二序列进行处理后的序列。
其中，本申请实施例中，网络设备若确定需要发送第一序列，则可对第一序列进行调制，并对调制后的第一序列中每一元素与第一数据进行异或运算。网络设备若确定需要发送第二序列，则可对第二序列进行调制，将调制后得到的第二序列中每一元素与第二数值进行异或运算。其中，所述第一数值与所述第二数值不同，且为0和1中的一个。
本申请实施例中，网络设备若确定需要发送第一序列，则可对第一序列进行调制，并对调制后的第一序列进行第一相位旋转。网络设备若确定需要发送第二序列，则可对第二序列进行调制，并将调制后的第二序列进行第二相位旋转。其中，所述第一相位与所述第二相位不同。
本申请实施例中通过上述对序列进行调制，并对调制后的序列进行异或运算或相位调整，可使第一序列和第二序列进行调制后，映射到不同的星座点，并在叠加后具备更好的峰均比。
另一种可能的示例中，本申请实施例中网络设备若确定需要发送第一序列，可将多个上行信道的第一序列，进行处理后叠加在一个下行信道发送，以节省信道资源。其中，网络设备对多个上行信道的第一序列的处理过程可包括调制、相位旋转、叠加以及归一化处理中的至少一个。
本申请实施例为描述方便，以多个上行信道包括第一上行信道和至少一个第二上行信道为例进行说明。第一终端在第一上行信道上向网络设备发送上行数据，网络设备针对第一上行信道确定第一序列，并在第一下行信道发送第一序列。第二终端在第二上行信道上向网络设备发送上行数据，网络设备针对第二上行信道确定的序列称为第三序列，该第三序列可以是根据第二终端标识生成的序列，也可以是根据第二上行信道标识生成的序列。其中，若所述网络设备在所述第二上行信道上正确接收到对应于第二终端的上行数据，则所述第三序列为根据所述第二终端标识确定的序列。若所述网络设备在所述第二上行信道上未正确接收到上行数据，则所述第三序列为根据所述第二上行信道标识确定的序列。
进一步的，为描述方便，本申请实施例中将网络设备对序列进行调制以及对调制后的序列进行异或运算或相位旋转的处理称为第一处理，将网络设备对多个上行信道的第一序列或第二序列的处理称为第二处理。
本申请实施例中，网络设备在第一下行信道发送第一序列的实施方式可采用如下实施方式中的至少一种：
S103a：网络设备在第一下行信道发送第一序列。
S103b：网络设备在第一下行信道上，发送对所述第一序列进行第一处理后得到的序列。
S103c：网络设备在第一下行信道上，发送对所述第一序列与至少一个第三序列进行第二处理后得到的序列。其中，所述至少一个第三序列是所述网络设备分别针对至少一个第二上行信道确定的。
S103d：网络设备在第一下行信道上，发送对第四序列集合进行第二处理后得到的序列。其中，所述第四序列集合中包括对所述第一序列进行第一处理后得到的序列，以及对所述至少一个第三序列进行第一处理后得到的序列。
其中，网络设备若确定需要发送第二序列，也可将多个上行信道的第二序列，进行处理后叠加在一个下行信道发送，以节省信道资源。其中，网络设备对多个上行信道的第二序列的处理过程可包括调制、相位旋转、叠加以及归一化处理中的至少一个。其中，多个上行信道包括第一上行信道和至少一个第二上行信道，第一终端在第一上行信道上向网络设备发送上行数据，网络设备针对第一上行信道确定第二序列，并在第一下行信道发送第二序列。第二终端在第二上行信道上向网络设备发送上行数据，网络设备针对第二上行信道确定第三序列。网络设备可采用如下方式之一发送第二序列：
S103a：网络设备在第一下行信道上，发送第二序列。
S103b：网络设备在第一下行信道上，发送对第二序列进行第一处理后得到的序列。
S103c：网络设备在第一下行信道上，发送对第二序列与至少一个第三序列进行第二处理后得到的序列，至少一个第三序列是网络设备分别针对至少一个第二上行信道确定的。
S103d：网络设备在第一下行信道上，发送对第四序列集合进行第二处理后得到的序列，其中，第四序列集合中包括对第二序列进行第一处理后得到的序列，以及对至少一个第三序列进行第一处理后得到的序列。
本申请实施例中，无论网络设备是否在上行信道上正确接收到上行数据，均会针对该第一上行信道确定序列，并在下行反馈时发送给终端，故终端也会预先确定，若未与其他终端发生资源冲突情况下，必然会接收到网络设备发送的针对该第一上行信道的下行反馈，即必然会收到第一序列或第二序列，若与其他终端发生资源冲突，则既不会接收到第一序列也不会接收到第二序列，进而可在一定程度上提高确定网络设备是否正确接收到上行数据的检测成功率。
本申请实施例中网络设备通过第一下行信道向终端发送第一序列或第二序列后，经过空口传输后到达终端侧的序列可能并不是第一序列或第二序列，而是经过处理以及添加了噪声的序列，本申请实施例为描述方便，将终端接收到的网络设备发送的第一序列或第二序列称为第五序列。
S104：终端从网络设备处接收第五序列。
S105：终端根据所述第五序列确定第一相关值和第二相关值。
其中，本申请实施例中，终端根据终端标识确定序列，并根据上行信道标识确定序列，本申请实施例将终端根据终端标识确定的序列称为第六序列，将终端根据上行信道标识确 定的序列称为第七序列。本申请实施例中，网络设备可对第五序列和第六序列进行第三处理得到第一相关值，对第五序列和第七序列进行第四处理得到第二相关值。
S106：终端根据第一相关值和第二相关值，确定网络设备是否正确接收到终端在第一上行信道上发送的上行数据。
本申请实施例中终端根据两个相关值，确定网络设备是否正确接收到终端在第一上行信道上发送的上行数据，相比根据一个相关值确定网络设备是否正确接收到终端在第一上行信道上发送的上行数据，一定程度上提高了检测成功率，可保证覆盖性能。并且利用第一相关值和第二相关值，确定网络设备是否正确接收到终端在第一上行信道上发送的上行数据，相比根据一个相关值确定网络设备是否正确接收到终端在第一上行信道上发送的上行数据，能够降低发生资源冲突的终端错检出ACK的概率，进而一定程度上降低了发生资源冲突的终端的虚警概率。
一种可能的示例中，终端可利用第一相关值和第二相关值进行联合估计检测，并根据联合估计检测结果，确定网络设备是否成功接收到所述终端在第一上行信道上的上行数据。
其中，终端利用第一相关值和第二相关值进行联合估计检测过程中，可利用第一相关值和第二相关值之间的差值进行联合估计检测；或可利用第一相关值和第二相关值之间的比值进行联合估计检测；或可利用所述第一相关值的绝对值和所述第二相关值的绝对值之和进行联合估计检测。
本申请实施例中为描述方便，可将所述第一相关值和第二相关值之间的差值；或第一相关值和第二相关值之间的比值；或所述第一相关值的绝对值和所述第二相关值的绝对值之和等对第一相关值和第二相关值进行运算后得到的值称之为第一相关值和第二相关值的联合估计检测值。
需要说明的是，本申请实施例中利用第一相关值和第二相关值的联合估计检测值，进行联合估计检测的实现过程，并不限定必须采用上述涉及的联合估计检测值的算法实现，还可采用其它的算法实现。例如，可将所述第一相关值与第一门限比较后的逻辑结果，与所述第二相关值与第二门限比较后的逻辑结果进行逻辑与后的结果作为联合估计检测值。本申请实施例以下以联合估计检测值为第一相关值和第二相关值之间的差值为例进行说明。
其中，终端进行联合估计检测过程中，可为第一相关值、第二相关值以及联合估计检测值设置对应的联合检测门限，通过比较第一相关值、第二相关值以及联合估计检测值，与各自对应的联合检测门限值的大小，确定网络设备是否成功接收到所述终端在第一上行信道上的上行数据。
例如，联合估计检测值采用第一相关值和第二相关值之间的差值情况下，本申请实施例中，终端可预设第一相关值对应的第一联合检测门限值，第二相关值对应的第二联合检测门限值，以及联合估计检测值对应的第三联合检测门限值，通过判断第一相关值、第二相关值以及联合估计检测值与各自对应的门限值的大小，确定网络设备是否成功接收到所述终端在第一上行信道上的上行数据。例如，若第一相关值大于预设的第一联合检测门限值，第二相关值小于等于预设的第二联合检测门限值，第一相关值和第二相关值的联合估计检测值小于设定的第三联合检测门限值，则终端可确定网络设备正确接收到终端在第一上行信道上发送的上行数据。若第一相关值小于等于预设的第一联合检测门限值，第二相 关值大于预设的第二联合检测门限值，第一相关值和第二相关值的联合估计检测值小于设定的第三联合检测门限值，则终端可确定网络设备未正确接收到终端在第一上行信道上发送的上行数据。若第一相关值和第二相关值的联合估计检测值小于设定的第三联合检测门限值，则终端可确定网络设备未正确接收到终端在第一上行信道上发送的上行数据，且为发生资源冲突的终端。
进一步的，本申请上述实施例中涉及的第一序列可以为Golden序列、m序列和ZC(Zadoff-Chu)序列中的任意一种，或者所述第二序列也可为Golden序列、m序列和ZC(Zadoff-Chu)序列中的任意一种，以使下行反馈发送达到较好的性能。第六序列和第七序列分别可为Golden序列、m序列和ZC(Zadoff-Chu)序列中的任意一种。
其中，Golden序列是一种伪随机二元序列，Golden序列使用实数种子生成期望的长度的序列，序列的元素为0和1。m序列同样是一种伪随机二元序列，m序列长度为2的幂次方长度减1，m序列中元素0和元素1的个数相差1，这个特性是其他伪随机序列不具备的。ZC序列是复数值序列，ZC序列长度可以设置为期望的长度，每个ZC序列有一个根(root)，在同一个root下，有一组ZC序列，一般的，root选取质数。本申请实施例中采用以上三种序列都可以使下行反馈发送达到较好的性能，但是Golden序列由于可以直接使用终端标识作为种子，节省了信令开销，而m序列和ZC序列，都需要信令开销完成终端和序列之间的映射绑定，故本申请实施例以下以本申请上述实施例中涉及的序列为Golden序列为例进行说明。
本申请实施例以下结合实际应用对上述涉及的下行反馈方法进行说明。
假设企业级物联网通信系统中的6个上行信道划分为一组，每组上行信道上包括上行信道0～5，并在一个下行信道上进行下行反馈。并假设终端0～4分别使用上行信道0～4发送上行数据，终端5使用上行信道3发送上行数据，没有任何终端在上行信道5上发送上行数据。假设网络设备确定在上行信道0～3上正确接收到了上行数据，在上行信道4～5上未正确接收到上行数据，并且网络设备在信道3上接收到的上行数据是终端3发送的上行数据。上述过程汇总，终端0～4正常发送了上行数据，可称为正常用户。终端5由于和终端3在上行信道3上发生了资源冲突，未正常发送数据，可称为碰撞用户。
针对上述场景，采用本申请实施例上述涉及的下行反馈方法，网络设备针对上行信道0～3，确定正确接收到了终端0～3发送的上行数据，则确定需要针对上行信道0～3反馈第一序列。网络设备确定需要针对上行信道0～3反馈第一序列后，可针对上行信道0～3依据终端0～3对应的终端标识分别确定第一序列，例如根据终端0～3的标识分别生成Golden序列。网络设备针对上行信道4～5，确定未正确接收到上行数据，则确定需要针对上行信道4～5反馈第二序列。网络设备确定需要针对上行信道4～5反馈第二序列后，可针对上行信道4～5依据上行信道4～5对应的上行信道标识分别确定第二序列，例如根据上行信道4～5的标识分别生成Golden序列。
本申请实施例中，网络设备针对上行信道0～5分别生成了Golden序列后，可将上行信道0～5对应的各Golden序列通过一个下行信道发送。
图5所示为本申请实施例提供的一种将多个上行信道的序列通过一个下行信道发送的实施过程示意图。参阅图5所示，网络设备首先对上行信道0～5的下行反馈(第一序列或第二序列)进行调制，以完成序列映射，例如可采用BPSK调制方式进行BPSK映射。其中，可结合正确接收上行数据的下行反馈序列(ACK)和终端标识得到第一序列后，对第一序列 进行序列映射。结合未正确接收上行数据的下行反馈序列(NACK)和上行信道标识得到第二序列后，对第二序列进行序列映射。其中，网络设备根据终端标识或上行信道标识生成的第一序列或第二序列为二进制Golden序列，二进制Golden序列进行BPSK映射后可为复数值序列。
一种可能的示例中，网络设备可对调制后的第一序列对应的复数值序列和调制后的第二序列对应的复数值序列进行不同相位的旋转，或者对调制后的第一序列对应的复数值序列中的元素和调制后的第二序列对应的复数值序列中的元素分别采用不同数值进行异或运算，以区分不同的终端。
本申请实施例中，可将序列映射后得到的复数值序列(也可以是相位旋转或异或运算后的复数值序列)叠加并进行归一化处理，将叠加并归一化处理后的序列进行资源映射，以映射到数据RE位置，并进行快速傅立叶反变换(Inverse Fast Fourier transform，IFFT)，并附加循环前缀(Cyclic Prefix，CP)后，映射参考信号(Reference Signal，RS)生成正交频分复用(Orthogonal Frequency Division Multiplexing，OFDM)信号在下行信道上向终端发送。终端接收到网络设备发送的OFDM信号以后去除CP，并进行快速傅立叶变换(Fast Fourier transform，FFT)、信道分离、信道估计&均衡等后，得到从网络设备获取到的复数值序列(上述实施例中涉及的第五序列)。
终端0～5分别在本地依据各自的终端标识和发送上行数据使用的上行信道对应的上行信道标识生成两个Golden序列(第六序列和第七序列)。例如，对于终端0而言，终端0使用信道0的标识生成Golden序列(第六序列)，并使用终端0的标识生成Golden序列(第七序列)。终端0～5分别将本地生成的两个Golden序列(第六序列和第七序列)与从网络设备接收并处理后得到的复数值序列(第五序列)进行序列相关，得到第一相关值和第二相关值。
一种可能的示例中，以11520长度的序列为例，可将接收信道每个复数样点值与接收信号样点值的共轭相乘，再累加11520个样点值，得到第一相关值和第二相关值，例如采用如下公式得到第一相关值和第二相关值：
Figure PCTCN2017088106-appb-000001
Figure PCTCN2017088106-appb-000002
Figure PCTCN2017088106-appb-000003
六序列进行相关后得到的第一相关值，Corchannel为第五序列与第七序列进行相关后得到的第二相关值，i为0至11519内的整数。
本申请实施例中，终端可根据第一相关值和第二相关值之间的差值，进行联合估计检测，以确定网络设备是否正确接收到上行数据。
一种可能的示例中，若所述联合检测结果为所述联合估计检测值的绝对值大于预设的第三联合估计检测门限值，且所述第一相关值的实部大于第一联合检测门限值，则所述终端确定所述网络设备在所述终端发送上行数据的上行信道上正确接收上行数据。若所述联合检测结果为所述联合估计检测值的绝对值大于预设的第三联合估计检测门限值，且所述第一相关值的实部小于第二联合检测门限值，则所述终端确定所述网络设备在所述终端发送上行数据的上行信道上未正确接收上行数据。若所述联合检测结果为所述联合估计检测 值的绝对值小于预设的第三联合估计检测门限值，则所述终端确定所述网络设备在所述终端发送上行数据的上行信道上未正确接收上行数据，且该终端为发生资源冲突的终端。
其中，终端根据第一相关值和第二相关值之间的差值，进行联合估计检测过程中，可利用第一相关值和第二相关值的差值的累积分布函数(cumulative distribution function，CDF)曲线分布选取联合估计检测门限值。
本申请实施例提供的上述下行反馈方法，无论网络设备是否在上行信道上正确接收到上行数据，均会针对该第一上行信道确定序列，并在下行反馈时发送给终端，故终端也会预先确定，若未与其他终端发生资源冲突情况下，必然会接收到网络设备发送的针对该第一上行信道的下行反馈，即必然会收到第一序列或第二序列，若与其他终端发生资源冲突，则既不会接收到第一序列也不会接收到第二序列，进而可在一定程度上提高确定网络设备是否正确接收到上行数据的检测成功率。终端根据两个相关值，确定网络设备是否正确接收到终端在第一上行信道上发送的上行数据，相比根据一个相关值确定网络设备是否正确接收到终端在第一上行信道上发送的上行数据，一定程度上提高了检测成功率。并且网络设备基于终端标识确定第一序列或基于第一信道标识确定第二序列，有效降低了碰撞用户的虚警概率，有效区分资源冲突，并可保证覆盖性能。
上述主要从终端和网络设备交互的角度对本申请实施例提供的方案进行了介绍。可以理解的是，终端和网络设备为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。结合本申请中所公开的实施例描述的各示例的单元(器、器件)及算法步骤，本申请实施例能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。本领域技术人员可以对每个特定的应用来使用不同的方法来实现所描述的功能，但是这种实现不应认为超出本申请实施例的技术方案的范围。
本申请实施例可以根据上述方法示例对终端和网络设备进行功能单元(器、器件)的划分，例如，可以对应各个功能划分各个功能单元(器、器件)，也可以将两个或两个以上的功能集成在一个处理单元(器、器件)中。上述集成的单元(器、器件)既可以采用硬件的形式实现，也可以采用软件功能单元(器、器件)的形式实现。需要说明的是，本申请实施例中对单元(器、器件)的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
在采用集成的单元(器、器件)的情况下，图6示出了本申请实施例提供的一种下行反馈发送装置的结构示意图，该下行反馈发送装置可应用于网络设备。参阅图6所示，下行反馈发送装置100包括处理单元101和发送单元102。其中，处理单元101，用于确定在第一上行信道上是否正确接收到上行数据。若处理单元101确定正确接收到上行数据，则处理单元101确定第一序列，所述第一序列用于表征所述网络设备在所述第一上行信道上正确接收到对应于第一终端的上行数据，且所述第一序列为根据第一终端标识确定的序列。发送单元102发送第一序列。
若处理单元101未正确接收到上行数据，则处理单元101确定第二序列，所述第二序列用于表征所述网络设备在所述第一上行信道上未正确接收到上行数据，且所述第二序列为根据所述第一上行信道标识确定的序列，发送单元102发送第二序列。
一种可能的实施方式中，所述处理单元101，采用如下方式确定第一序列：
基于第一终端标识和表征第一序列发送时间的时间参数，生成第一序列；或依据第一 终端标识与第一序列之间的预设映射关系，在第一序列集合中获取第一序列；或根据第一索引信息，在第一序列集合中获取第一序列。
或者，所述处理单元101，采用如下方式确定第二序列：
基于第一上行信道标识和表征第二序列发送时间的时间参数，生成第二序列；或依据第一上行信道标识与第二序列之间的预设映射关系，在第二序列集合中获取第二序列；或根据第二索引信息，在第二序列集合中获取第二序列。
又一种可能的实施方式中，所述发送单元102，采用如下方式发送所述第一序列：
在第一下行信道上，发送所述第一序列；或者
在第一下行信道上，发送对所述第一序列进行第一处理后得到的序列；或者
在第一下行信道上，发送对所述第一序列与至少一个第三序列进行第二处理后得到的序列，所述至少一个第三序列是所述处理单元101分别针对至少一个第二上行信道确定的；或者
在第一下行信道上，发送对第四序列集合进行第二处理后得到的序列，其中，所述第四序列集合中包括对所述第一序列进行第一处理后得到的序列，以及对所述至少一个第三序列进行第一处理后得到的序列，所述至少一个第三序列是所述处理单元101分别针对至少一个第二上行信道确定的。
又一种可能的实施方式中，所述发送单元102，采用如下方式发送所述第二序列：
在第一下行信道上，发送所述第二序列；或者
在第一下行信道上，发送对所述第二序列进行第一处理后得到的序列；或者
在第一下行信道上，发送对所述第二序列与至少一个第三序列进行第二处理后得到的序列，所述至少一个第三序列是所述处理单元101分别针对至少一个第二上行信道确定的；或者
在第一下行信道上，发送对第四序列集合进行第二处理后得到的序列，其中，所述第四序列集合中包括对所述第二序列进行第一处理后得到的序列，以及对至少一个第三序列进行第一处理后得到的序列，所述至少一个第三序列是所述处理单元101分别针对至少一个第二上行信道确定的。
其中，所述第一处理包括对序列进行调制，并对调制后的序列进行异或运算或相位调整。其中，所述发送单元102采用如下方式对所述第一序列进行第一处理：对所述第一序列进行调制，并将调制后得到的第一序列中每一元素与第一数值进行异或运算，或者将调制后得到的第一序列进行第一相位旋转。或者所述发送单元102采用如下方式对所述第二序列进行第一处理：对所述第二序列进行调制，并将调制后得到的第二序列中每一元素与第二数值进行异或运算，或者将调制后的第二序列进行第二相位旋转。
其中，所述第一数值与所述第二数值不同，且为0和1中的一个；所述第一相位与所述第二相位不同。
又一种可能的实施方式中，若所述处理单元101确定在所述第二上行信道上正确接收到对应于第二终端的上行数据，则所述第三序列为根据所述第二终端标识确定的序列。若所述处理单元101确定在所述第二上行信道上未正确接收到上行数据，则所述第三序列为根据所述第二上行信道标识确定的序列。
其中，所述第一序列为Golden序列、m序列和ZC序列中的任意一种，或者所述第二序列为Golden序列、m序列和ZC序列中的任意一种。
其中，所述第二处理包含调制、相位旋转、叠加以及归一化处理中的至少一个。
当采用硬件形式实现时，本申请实施例中，处理单元101可以是处理器或控制器。发送单元102可以是通信接口、收发器、收发电路等。其中，通信接口是统称，可以包括一个或多个接口。
当所处理单元101处理器，发送单元102是收发器时，本申请实施例所涉及的下行反馈发送装置100可以为图7所示下行反馈发送装置，图7所示的下行反馈发送装置可以是网络设备，例如基站。
图7示出了本申请实施例提供的网络设备1000的结构示意图，即示出了下行反馈发送装置100的另一结构示意图。参阅图7所示，网络设备1000包括处理器1001、收发器1002。其中，处理器1001也可以为控制器。所述处理器1001被配置为支持网络设备执行图4中涉及的功能。所述收发器1002被配置为支持网络设备收发消息的功能。所述网络设备还可以包括存储器1003，所述存储器1003用于与处理器1001耦合，其保存网络设备必要的程序指令和数据。其中，处理器1001、收发器1002和存储器1003相连，该存储器1003用于存储指令，该处理器1001用于执行该存储器1003存储的指令，以控制收发器1002收发信号，完成上述方法中网络设备执行相应功能的步骤。
本申请实施例中，下行反馈发送装置100和网络设备1000所涉及的与本申请实施例提供的技术方案相关的概念，解释和详细说明及其他步骤请参见前述方法或其他实施例中关于这些内容的描述，此处不做赘述。
在采用集成的单元(器、器件)的情况下，图8示出了本申请实施例提供的一种下行反馈接收装置的结构示意图，该下行反馈接收装置可应用于终端。参阅图8所示，下行反馈接收装置200包括接收单元201和处理单元202。其中，接收单元201，用于从网络设备接收第五序列。处理单元202，用于根据所述接收单元201接收的第五序列确定第一相关值和第二相关值，并根据第一相关值和第二相关值，确定所述网络设备是否正确接收到所述终端在第一上行信道上发送的上行数据。
其中，所述第一相关值是所述第五序列和第六序列经过第三处理得到的，所述第二相关值是所述第五序列和第七序列经过第四处理得到的；所述第六序列为根据终端标识确定的序列，所述第七序列为根据第一上行信道标识确定的序列。
其中，所述第六序列为Golden序列、m序列和ZC序列中的任意一种，和/或所述第七序列为Golden序列、m序列和ZC序列中的任意一种。
一种可能的实施方式中，所述第三处理和/或第四处理包括相关计算操作。所述处理单元202，采用如下方式根据第一相关值和第二相关值，确定所述网络设备是否正确接收到所述终端在第一上行信道上发送的上行数据：
利用所述第一相关值和第二相关值，进行联合估计检测；根据所述联合估计检测结果，确定所述网络设备是否成功接收到所述终端在第一上行信道上的上行数据。
其中，所述处理单元202可利用所述第一相关值和第二相关值之间的差值进行联合估计检测；或可利用第一相关值和第二相关值之间的比值进行联合估计检测；或可利用所述第一相关值的绝对值和所述第二相关值的绝对值之和进行联合估计检测。
当采用硬件形式实现时，本申请实施例中，接收单元201可以是通信接口、接收器、接收电路等。处理单元202可以是处理器或控制器。其中，通信接口是统称，可以包括一个或多个接口。
当所述接收单元201是接收器，处理单元202是处理器时，本申请实施例所涉及的下行反馈接收装置200可以为图9所示的下行反馈接收装置，图9所示的下行反馈接收装置可以是终端。
图9示出了本申请实施例提供的终端2000的结构示意图，即示出了下行反馈接收装置200另一种可能的结构示意图。参阅图9所示，终端2000包括处理器2001、发射器2002和接收器2003。其中，处理器2001也可以为控制器。所述处理器2001被配置为支持终端执行图4中涉及的终端的功能。所述发射器2002和接收器2003被配置为支持终端2000与网络设备之间进行消息的收发功能。所述终端2000还可以包括存储器2004，所述存储器2004用于与处理器2001耦合，其保存终端2000必要的程序指令和数据。其中，处理器2001、发射器2002、接收器2003和存储器2004相连，该存储器2004用于存储指令，该处理器2001用于执行该存储器2004存储的指令，以控制发射器2002和接收器2003收发信号，完成上述方法中终端执行相应功能的步骤。
进一步的，所述终端2000还可以包括天线2005。
本申请实施例中，下行反馈接收装置200和终端2000所涉及的与本申请实施例提供的技术方案相关的概念，解释和详细说明及其他步骤请参见前述方法或其他实施例中关于这些内容的描述，此处不做赘述。
可以理解的是，本申请实施例附图中仅仅示出了网络设备和终端的简化设计。在实际应用中，网络设备和终端并不限于上述结构，例如还可以包括天线阵列，双工器以及基带处理部分。
其中，网络设备的双工器用于实现天线阵列，既用于发送信号，又用于接收信号。发射器用于实现射频信号和基带信号之间的转换，通常发射器可以包括功率放大器，数模转换器和变频器，通常接收器可以包括低噪放，模数转换器和变频器。其中，接收器和发射器有时也可以统称为收发器。基带处理部分用于实现所发送或接收的信号的处理，比如层映射、预编码、调制/解调，编码/译码等，并且对于物理控制信道、物理数据信道、物理广播信道、参考信号等进行分别的处理。再例如，终端还可以包括显示设备、输入输出接口等。
其中，终端可具有单天线，也可以具有多天线(即天线阵列)。其中，终端的双工器用于实现天线阵列既用于发送信号，又用于接收信号。发射器用于实现射频信号和基带信号之间的转换，通常发射器可以包括功率放大器，数模转换器和变频器，通常接收器可以包括低噪放，模数转换器和变频器。基带处理部分用于实现所发送或接收的信号的处理，比如层映射、预编码、调制/解调，编码/译码等，并且对于物理控制信道、物理数据信道、物理广播信道、参考信号等进行分别的处理。在一个示例中，终端也可以包括控制部分，用于请求上行物理资源、计算下行信道对应的信道状态信息(Channel State Information，CSI)、判断下行数据包是否接收成功等等。
需要说明的是，本申请实施例上述涉及的处理器可以是中央处理器(Central Processing Unit，CPU)，通用处理器，数字信号处理器(Digital Signal Processor，DSP)，专用集成电路(Application-Specific Integrated Circuit，ASIC)，现场可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框，模块和电路。处理器也可以是实现计算功能的组合，例如包含一个或 多个微处理器组合，DSP和微处理器的组合等等。
其中，所述存储器可以集成在所述处理器中，也可以与所述处理器分开设置。
作为一种实现方式，接收器和发射器的功能可以考虑通过收发电路或者收发的专用芯片实现。处理器可以考虑通过专用处理芯片、处理电路、处理器或者通用芯片实现。
作为另一种实现方式，将实现处理器、接收器和发射器功能的程序代码存储在存储器中，通用处理器通过执行存储器中的代码来实现处理器、接收器和发射器的功能。
根据本申请实施例提供的方法，本申请实施例还提供一种通信系统，其包括前述的网络设备和一个或多于一个终端。
本申请实施例还提供一种计算机存储介质，用于存储一些指令，这些指令被执行时，可以完成前述终端或网络设备所涉及的任意一种方法。
本申请实施例还提供一种计算机程序产品，用于存储计算机程序，该计算机程序用于执行上述方法实施例中涉及的调度MF系统信息块的方法。
本领域内的技术人员应明白，本申请实施例可提供为方法、系统、或计算机程序产品。因此，本申请实施例可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请实施例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、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请实施例是参照根据本申请实施例的方法、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。

Claims (25)

  1. 一种下行反馈发送方法，其特征在于，包括：
    网络设备确定在第一上行信道上是否正确接收到上行数据；
    若正确接收到上行数据，则所述网络设备确定并发送第一序列，所述第一序列用于表征所述网络设备在所述第一上行信道上正确接收到对应于第一终端的上行数据，且所述第一序列为根据所述第一终端标识确定的序列；
    若未正确接收到上行数据，则所述网络设备确定并发送第二序列，所述第二序列用于表征所述网络设备在所述第一上行信道上未正确接收到上行数据，且所述第二序列为根据所述第一上行信道标识确定的序列。
  2. 根据权利要求1所述的方法，其特征在于，所述网络设备确定第一序列，包括：
    所述网络设备基于第一终端标识和表征第一序列发送时间的时间参数，生成第一序列；或
    所述网络设备依据第一终端标识与第一序列之间的映射关系，在第一序列集合中获取第一序列；或
    所述网络设备根据第一索引信息，在第一序列集合中获取第一序列；
    或者，所述网络设备确定第二序列，包括：
    所述网络设备基于第一上行信道标识和表征第二序列发送时间的时间参数，生成第二序列；或
    所述网络设备依据第一上行信道标识与第二序列之间的映射关系，在第二序列集合中获取第二序列；或
    所述网络设备根据第二索引信息，在第二序列集合中获取第二序列。
  3. 根据权利要求1或2所述的方法，其特征在于，所述网络设备发送第一序列，包括：
    所述网络设备在第一下行信道上发送所述第一序列；或者
    所述网络设备在第一下行信道上发送对所述第一序列进行第一处理后得到的序列；或者
    所述网络设备在第一下行信道上发送对所述第一序列与至少一个第三序列进行第二处理后得到的序列，所述至少一个第三序列是所述网络设备分别针对至少一个第二上行信道确定的；或者
    所述网络设备在第一下行信道上发送对第四序列集合进行第二处理后得到的序列，其中，所述第四序列集合中包括对所述第一序列进行第一处理后得到的序列，以及对至少一个第三序列进行第一处理后得到的序列，所述至少一个第三序列是所述网络设备分别针对至少一个第二上行信道确定的；
    或者，所述网络设备发送第二序列，包括：
    所述网络设备在第一下行信道上发送所述第二序列；或者
    所述网络设备在第一下行信道上发送对所述第二序列进行第一处理后得到的序列；或者
    所述网络设备在第一下行信道上发送对所述第二序列与至少一个第三序列进行第二处理后得到的序列，所述至少一个第三序列是所述网络设备分别针对至少一个第二上行信 道确定的；或者
    所述网络设备在第一下行信道上发送对第四序列集合进行第二处理后得到的序列，其中，所述第四序列集合中包括对所述第二序列进行第一处理后得到的序列，以及对至少一个第三序列进行第一处理后得到的序列，所述至少一个第三序列是所述网络设备分别针对至少一个第二上行信道确定的。
  4. 根据权利要求3所述的方法，其特征在于，所述第一处理包括对序列进行调制，并对调制后的序列进行异或运算或相位调整。
  5. 根据权利要求3或4所述的方法，其特征在于，若所述网络设备在所述第二上行信道上正确接收到对应于第二终端的上行数据，所述第三序列为根据所述第二终端标识确定的序列。
  6. 根据权利要求3或4所述的方法，其特征在于，若所述网络设备在所述第二上行信道上未正确接收到上行数据，则所述第三序列为根据所述第二上行信道标识确定的序列。
  7. 根据权利要求3-6任一项所述的方法，其特征在于，所述第二处理包含调制、相位旋转、叠加以及归一化处理中的至少一个。
  8. 根据权利要求1至7任一项所述的方法，其特征在于，所述第一序列为Golden序列、m序列和ZC序列中的任意一种；或
    所述第二序列为Golden序列、m序列和ZC序列中的任意一种。
  9. 一种下行反馈接收方法，其特征在于，包括：
    终端从网络设备接收第五序列；
    所述终端根据所述第五序列确定第一相关值和第二相关值，所述第一相关值是所述第五序列和第六序列经过第三处理得到的，所述第二相关值是所述第五序列和第七序列经过第四处理得到的；
    所述终端根据所述第一相关值和第二相关值，确定所述网络设备是否正确接收到所述终端在第一上行信道上发送的上行数据；
    其中，所述第六序列为根据所述终端标识确定的序列，所述第七序列为根据所述第一上行信道标识确定的序列。
  10. 根据权利要求9所述的方法，其特征在于，所述第六序列为Golden序列、m序列和ZC序列中的任意一种；和/或
    所述第七序列为Golden序列、m序列和ZC序列中的任意一种。
  11. 根据权利要求9或10所述的方法，其特征在于，所述第三处理和/或第四处理包括相关计算操作；
    所述终端根据所述第一相关值和第二相关值，确定所述网络设备是否正确接收到所述终端在第一上行信道上发送的上行数据，包括：
    所述终端利用所述第一相关值和第二相关值，进行联合估计检测；
    所述终端根据所述联合估计检测结果，确定所述网络设备是否成功接收到所述终端在第一上行信道上的上行数据。
  12. 根据权利要求11所述的方法，其特征在于，所述终端利用所述第一相关值和第二相关值，进行联合估计检测，包括：
    利用所述第一相关值和第二相关值之间的差值，进行联合估计检测；或
    利用所述第一相关值和第二相关值之间的比值，进行联合估计检测；或
    利用所述第一相关值的绝对值和所述第二相关值的绝对值之和，进行联合估计检测。
  13. 一种下行反馈发送装置，包括处理单元和发送单元，其特征在于：
    所述处理单元，用于确定在第一上行信道上是否正确接收到上行数据；
    若所述处理单元确定正确接收到上行数据，则所述处理单元确定第一序列，所述第一序列用于表征所述网络设备在所述第一上行信道上正确接收到对应于第一终端的上行数据，且所述第一序列为根据所述第一终端标识确定的序列，所述发送单元发送所述第一序列；
    若所述处理单元确定未正确接收到上行数据，则所述处理单元确定第二序列，所述第二序列用于表征所述网络设备在所述第一上行信道上未正确接收到上行数据，且所述第二序列为根据所述第一上行信道标识确定的序列，所述发送单元发送所述第二序列。
  14. 根据权利要求13所述的装置，其特征在于，所述处理单元，采用如下方式确定第一序列：
    基于第一终端标识和表征第一序列发送时间的时间参数，生成第一序列；或
    依据第一终端标识与第一序列之间的映射关系，在第一序列集合中获取第一序列；或
    根据第一索引信息，在第一序列集合中获取第一序列；
    或者，所述处理单元，采用如下方式确定第二序列：
    基于第一上行信道标识和表征第二序列发送时间的时间参数，生成第二序列；或
    依据第一上行信道标识与第二序列之间的映射关系，在第二序列集合中获取第二序列；或
    根据第二索引信息，在第二序列集合中获取第二序列。
  15. 根据权利要求13或14所述的装置，其特征在于，所述发送单元，采用如下方式发送所述第一序列：
    在第一下行信道上发送所述第一序列；或者
    在第一下行信道上发送对所述第一序列进行第一处理后得到的序列；或者
    在第一下行信道上发送对所述第一序列与至少一个第三序列进行第二处理后得到的序列，所述至少一个第三序列是所述处理单元分别针对至少一个第二上行信道确定的；或者
    在第一下行信道上发送对第四序列集合进行第二处理后得到的序列，其中，所述第四序列集合中包括对所述第一序列进行第一处理后得到的序列，以及对至少一个第三序列进行第一处理后得到的序列，所述至少一个第三序列是所述处理单元分别针对至少一个第二上行信道确定的；
    或者，所述发送单元，采用如下方式发送所述第二序列：
    在第一下行信道上发送所述第二序列；或者
    在第一下行信道上发送对所述第二序列进行第一处理后得到的序列；或者
    在第一下行信道上发送对所述第二序列与至少一个第三序列进行第二处理后得到的序列，所述至少一个第三序列是所述处理单元分别针对至少一个第二上行信道确定的；或者
    在第一下行信道上发送对第四序列集合进行第二处理后得到的序列，其中，所述第四序列集合中包括对所述第二序列进行第一处理后得到的序列，以及对至少一个第三序列进 行第一处理后得到的序列，所述至少一个第三序列是所述处理单元分别针对至少一个第二上行信道确定的。
  16. 根据权利要求15所述的装置，其特征在于，所述第一处理包括对序列进行调制，并对调制后的序列进行异或运算或相位调整。
  17. 根据权利要求15或16所述的装置，其特征在于，若所述处理单元确定在所述第二上行信道上正确接收到对应于第二终端的上行数据，则所述第三序列为根据所述第二终端标识确定的序列。
  18. 根据权利要求15或16所述的装置，其特征在于，若所述处理单元确定在所述第二上行信道上未正确接收到上行数据，则所述第三序列为根据所述第二上行信道标识确定的序列。
  19. 根据权利要求15-18任一项所述的装置，其特征在于，所述第二处理包含调制、相位旋转、叠加以及归一化处理中的至少一个。
  20. 根据权利要求13至19任一项所述的装置，其特征在于，所述第一序列为Golden序列、m序列和ZC序列中的任意一种；或者
    所述第二序列为Golden序列、m序列和ZC序列中的任意一种。
  21. 一种下行反馈接收装置，其特征在于，应用于终端，包括：
    接收单元，用于从网络设备接收第五序列；
    处理单元，用于根据所述接收单元接收的第五序列确定第一相关值和第二相关值，并根据所述第一相关值和第二相关值，确定所述网络设备是否正确接收到所述终端在第一上行信道上发送的上行数据；
    其中，所述第一相关值是所述第五序列和第六序列经过第三处理得到的，所述第二相关值是所述第五序列和第七序列经过第四处理得到的；
    所述第六序列为根据所述第一终端标识确定的序列，所述第七序列为根据所述第一上行信道标识确定的序列。
  22. 根据权利要求21所述的装置，其特征在于，所述第六序列为Golden序列、m序列和ZC序列中的任意一种；
    所述第七序列为Golden序列、m序列和ZC序列中的任意一种。
  23. 根据权利要求21或22所述的装置，其特征在于，所述第三处理和/或第四处理包括相关计算操作；
    所述处理单元，采用如下方式根据所述第一相关值和第二相关值，确定所述网络设备是否正确接收到所述终端在第一上行信道上发送的上行数据：
    利用所述第一相关值和第二相关值，进行联合估计检测；
    根据所述联合估计检测结果，确定所述网络设备是否成功接收到所述终端在第一上行信道上的上行数据。
  24. 根据权利要求23所述的装置，其特征在于，所述处理单元，具体采用如下方式利用所述第一相关值和第二相关值，进行联合估计检测：
    利用所述第一相关值和第二相关值之间的差值，进行联合估计检测；或
    利用所述第一相关值和第二相关值之间的比值，进行联合估计检测；或
    利用所述第一相关值的绝对值和所述第二相关值的绝对值之和，进行联合估计检测。
  25. 一种计算机可读存储介质，其上存储有计算机程序，其特征在于，该程序被处理 器执行时实现权利要求1-12任一项所述的方法。
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