WO2020094155A1 - Procédé et dispositif d'envoi de signal de référence - Google Patents

Procédé et dispositif d'envoi de signal de référence Download PDF

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Publication number
WO2020094155A1
WO2020094155A1 PCT/CN2019/117209 CN2019117209W WO2020094155A1 WO 2020094155 A1 WO2020094155 A1 WO 2020094155A1 CN 2019117209 W CN2019117209 W CN 2019117209W WO 2020094155 A1 WO2020094155 A1 WO 2020094155A1
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Prior art keywords
terminal device
reference signal
sequence index
codebook
root sequence
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PCT/CN2019/117209
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English (en)
Chinese (zh)
Inventor
龚政委
吴亮
张蕾
王磊
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华为技术有限公司
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Publication of WO2020094155A1 publication Critical patent/WO2020094155A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2614—Peak power aspects
    • H04L27/262—Reduction thereof by selection of pilot symbols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path

Definitions

  • the present application relates to the field of communications, and in particular to a method and device for sending reference signals.
  • the communication network as the basis of the Internet of Things is facing the demand for large-scale random access, and the location of the access user is not fixed.
  • the current IoT technologies such as ZigBee / LoWPAN or IEEE802.11ah are only suitable for short-distance IoT coverage, and cannot guarantee reliable network coordination and control.
  • the current satellite communications have high costs, high energy consumption, and cannot reach indoors. Therefore, a high-performance cellular network with wide area coverage is an important technology that limits the development of the Internet of Things.
  • the uplink transmission of the terminal device is based on scheduling to achieve transmission, and there is a problem of large signaling overhead.
  • the terminal device sends data to the network device in a competitive manner, it is necessary to configure a large set of reference signal sequences for the accessed terminal device to avoid collision caused by different terminals sending the same reference signal sequence.
  • Different terminal devices send different reference signals, so that the network device realizes user identification based on the reference signals.
  • the present application provides a reference signal transmission method and device to solve the problem that the PAPR corresponding to the existing reference signal generated based on the PN sequence is usually large, which affects the high-power data transmission of the terminal device.
  • the first aspect of the present application provides a reference signal transmission method, which is applied to a terminal device side, and the terminal device determines the root sequence index value of the terminal device according to the coverage level information of the terminal device and a predefined sorted root sequence index value set;
  • the root sequence index value of the terminal device generates and sends a reference signal of the terminal device.
  • the lower the coverage level of the terminal device the smaller the coverage indication value corresponding to the root sequence index value of the terminal device.
  • the terminal device with poor coverage can also perform high-power data transmission when using the reference signal in this embodiment, and at the same time,
  • the root sequence index values are sorted according to the size of the coverage association indication value, which facilitates the selection of the root sequence index value with a smaller coverage association indication value from multiple root sequence index values.
  • the process of determining the root sequence index value of the terminal device may specifically include:
  • the terminal device determines the first value according to the first parameter set; according to the start value of the root sequence index value and the first value, the first subset of the root sequence index value is determined from the predefined sorted root sequence index value set, according to the terminal.
  • the coverage level information of the device and the first subset of root sequence index values determine the root sequence index value of the terminal device.
  • the first value is the number of root sequence index values selectable by the terminal device, and the first parameter set includes: the total number of reference signal sequences, the cyclic shift interval of the base sequence corresponding to the reference signal and the length of the base sequence corresponding to the reference signal; first The subset of root sequence index values includes consecutive first numerical value root index values from the starting value of the root sequence index value.
  • the terminal device can select the root corresponding to different coverage association indication values according to the coverage level in the first root sequence index value subset Sequence index value.
  • the manner of determining the root sequence index value of the terminal device in the first subset of the root sequence index value may specifically be:
  • the terminal device divides the first sequence index subset into the number of coverage levels and the second sequence index subset according to the coverage level division information; according to the coverage index interval corresponding to the coverage level interval of the terminal device, the second sequence index
  • the value subset determines the root sequence index value of the terminal device.
  • the coverage level division information is used to determine the number of coverage levels and coverage level intervals.
  • the terminal device must first resource mapping interval according to the reference signal, determining a number N RE resource units for transmitting reference signals;
  • the N RE determining a reference signal corresponding to the base sequence length N ZC, N ZC is a prime number not greater than N RE .
  • N ZC is the largest prime number not greater than N RE .
  • the method before the terminal device determines the root sequence index value of the terminal device according to the coverage level information of the terminal device and the predefined sorted root sequence index value set, the method further includes:
  • the terminal apparatus according to the group sequence length N ZC reference signal corresponding to the determined root sequence index values of the set of predefined reference signal corresponding to the base sequence length N ZC corresponding sort, a root sequence index value of the root sequence index value set in a corresponding one of The base sequence of length N ZC , the base sequence is the ZC sequence;
  • the terminal device generates a reference signal of the terminal device according to the root sequence index value of the terminal device, including:
  • the terminal device generates the reference signal of the terminal device according to the base sequence corresponding to the root sequence index value of the terminal device.
  • the terminal device generates the reference signal of the terminal device according to the base sequence corresponding to the root sequence index value of the terminal device, including:
  • the terminal device uses the base sequence corresponding to the root sequence index value of the terminal device as the reference signal sequence of the terminal device, and generates the reference signal of the terminal device according to the reference signal sequence of the terminal device; or,
  • the terminal device cyclically shifts the base sequence corresponding to the root sequence index value of the terminal device according to the cyclic shift interval and / or the cyclic shift start value to obtain the reference signal sequence of the terminal device, and generates the reference signal sequence of the terminal device The reference signal of the terminal equipment.
  • the correlation between the reference signals can be ensured to be low, and the correlation of the extended ZC sequence can be avoided to be high, which is not conducive to the problem of terminal detection performance.
  • the first parameter set further includes: a cyclic shift start value corresponding to the reference signal; the method further includes:
  • the terminal device receives the cyclic shift start value corresponding to the reference signal sent by the network device.
  • the reference signal sequence is continuously mapped on the resource unit for sending the reference signal in the frequency resource corresponding to the time domain symbol , And the number of spare resource units at both ends in the frequency resource corresponding to the time domain symbol differs by no more than 1;
  • the vacant resource unit is a resource unit to which reference signal sequences are not mapped among frequency resources used to transmit reference signals.
  • the reference signal when the resource unit used to send the reference signal is located in at least two time-domain symbols, the reference signal includes at least two reference signal subsequences, and the at least two reference signal subsequences are continuously mapped to Resource units used to send reference signals in frequency resources corresponding to different time-domain symbols;
  • the at least two reference signal sub-sequences there is at least one first reference signal sub-sequence and one second reference signal sub-sequence.
  • the element with the smallest number in the first reference signal sub-sequence is mapped to the time-domain symbol mapped by the reference signal sub-sequence
  • the smallest numbered resource unit in the corresponding frequency domain resource, the element with the highest number in the second reference signal subsequence is mapped to the largest numbered resource unit in the frequency domain resource corresponding to the time domain symbol mapped by the reference signal subsequence.
  • a second aspect of the present application provides a method for sending a reference signal, which is applied to a network device side and has method steps corresponding to the method for sending a reference signal on the terminal device side of the first aspect
  • the network device sends a first parameter set to the terminal device, where the first parameter set includes: the total number of reference signal sequences and the cyclic shift interval of the base sequence corresponding to the reference signal;
  • the network device receives the reference signal generated by the terminal device according to the first parameter.
  • the first parameter set further includes: a cyclic shift start value corresponding to the reference signal.
  • the method further includes:
  • the network device sends at least one of the following to the terminal device:
  • Coverage level information of terminal equipment predefined sorted root sequence index value set, root sequence index value start value, cyclic shift start value, coverage division level information, resource mapping interval of reference signal or base corresponding to reference signal Sequence length N ZC .
  • the third aspect of the present application provides a codebook generation method, which is applied to a terminal device side.
  • the codebook generation method includes:
  • the terminal device obtains the coverage level information of the terminal device and the ordered codebook set;
  • the terminal device determines the codebook subset of the terminal device according to the coverage level of the terminal device and the sorted codebook set;
  • the terminal device determines the codebook number of the terminal device according to the reference signal sequence number and the first preset mapping relationship
  • the terminal device determines the codebook corresponding to the codebook number in the codebook subset
  • the first preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number
  • the reference signal sequence number is the number of the reference signal sequence of the terminal device in the second sequence index subset
  • the codebook number is The corresponding number of the codeword in the codebook subset determined by the terminal device.
  • the codebook generation method includes:
  • the terminal device obtains the coverage level information of the terminal device and the ordered codebook set;
  • the terminal device determines the codebook subset of the terminal device according to the coverage level of the terminal device and the sorted codebook set;
  • the terminal device determines the codebook number of the terminal device according to the root sequence index value number and the second preset mapping relationship
  • the terminal device determines the codebook corresponding to the codebook number in the codebook subset
  • the second preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number
  • the root sequence index value number is the number of the root sequence index value of the terminal device in the second root sequence index value subset
  • the codebook The number is the corresponding number of the codeword in the codebook subset determined by the terminal device.
  • the codebook generation method includes:
  • the terminal device determines the codebook number of the terminal device according to the reference signal sequence number and the third preset mapping relationship
  • the terminal device determines the codebook corresponding to the codebook number in the sorted codebook set
  • the third preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number, the reference signal sequence number is the number of the reference signal sequence of the terminal device in the first sequence index subset, and the codebook number is The codeword number in the sorted codebook collection.
  • the codebook generation method includes:
  • the terminal device determines the codebook number of the terminal device according to the root sequence index value number and the fourth preset mapping relationship
  • the terminal device determines the codebook corresponding to the codebook number in the sorted codebook set
  • the fourth preset mapping relationship is the mapping relationship between the root sequence index value number and the codebook number.
  • the root sequence index value number is the number of the root sequence index value of the terminal device in the first root sequence index value subset, code This number is the codeword number in the sorted codebook set.
  • the first root sequence index value subset is determined by the terminal device according to the starting value of the root sequence index value and the first value, in a predefined sorted root sequence index value set, the first value The number of root sequence index values that can be selected by the terminal device.
  • the first value is determined by the terminal device according to a first parameter set.
  • the first parameter set includes: the total number of reference signal sequences, the cyclic shift interval of the base sequence corresponding to the reference signal, and the reference signal The length of the corresponding base sequence.
  • the second root sequence index value subset is obtained by the terminal device dividing the first root sequence index value subset according to the coverage level division information.
  • a fourth aspect of the present application provides a terminal device for performing the reference signal transmission method of the first aspect described above, which has the same or similar technical features and technical effects.
  • the terminal device includes:
  • the processor is used to determine the root sequence index value of the terminal device according to the coverage level information of the terminal device and the pre-defined sorted set of root sequence index values; the lower the coverage level of the terminal device, the corresponding to the root sequence index value of the terminal device The smaller the indication value of the coverage association;
  • the processor is also used to generate the reference signal of the terminal device according to the root sequence index value of the terminal device;
  • the transmitter is used to send a reference signal to the network device.
  • the processor is specifically used to,
  • the first value is determined according to the first parameter set.
  • the first value is the number of root sequence index values selectable by the terminal device.
  • the first parameter set includes: the total number of reference signal sequences, the cyclic shift interval of the base sequence corresponding to the reference signal and the reference The length of the base sequence corresponding to the signal;
  • a first subset of the index value of the root sequence is determined from the set of pre-defined sorted root sequence index values.
  • the root sequence index value of the terminal device is determined according to the coverage level information of the terminal device and the first root sequence index value subset.
  • the processor is specifically used to,
  • the first sequence index value subset is divided into the coverage level number and the second sequence index value subset; the coverage level division information is used to determine the coverage level number and coverage level interval;
  • the root sequence index value of the terminal device is determined according to the second root sequence index value subset corresponding to the coverage level interval corresponding to the coverage level of the terminal device.
  • the processor is further configured to determine the number N RE of resource units used to transmit the reference signal according to the resource mapping interval of the reference signal;
  • N RE determine the length of the base sequence corresponding to the reference signal N ZC , where N ZC is a prime number not greater than N RE .
  • the processor is further configured to, in accordance with the sequence length N ZC base reference signal corresponding to the determined root sequence index values of the set of predefined reference signal corresponding to a base sequence corresponding to the length N ZC ordered root
  • a root sequence index value in the sequence index value set corresponds to a base sequence of length N ZC , and the base sequence is a ZC sequence
  • the reference signal of the terminal device is generated according to the base sequence corresponding to the root sequence index value of the terminal device.
  • the processor is specifically configured to use the base sequence corresponding to the root sequence index value of the terminal device as the reference signal sequence of the terminal device, and generate the reference signal of the terminal device according to the reference signal sequence of the terminal device; or,
  • the first parameter set further includes: a cyclic shift start value corresponding to the reference signal; the terminal device further includes:
  • the receiver is used to receive the cyclic shift start value corresponding to the reference signal sent by the network device.
  • the reference signal sequence is continuously mapped on the resource unit for sending the reference signal in the frequency resource corresponding to the time domain symbol , And the number of spare resource units at both ends in the frequency resource corresponding to the time domain symbol differs by no more than 1;
  • the vacant resource unit is a resource unit to which reference signal sequences are not mapped among frequency resources used to transmit reference signals.
  • the reference signal when the resource unit used to send the reference signal is located in at least two time-domain symbols, the reference signal includes at least two reference signal subsequences, and the at least two reference signal subsequences are continuously mapped to Resource units used to send reference signals in frequency resources corresponding to different time-domain symbols;
  • the at least two reference signal sub-sequences there is at least one first reference signal sub-sequence and one second reference signal sub-sequence.
  • the element with the smallest number in the first reference signal sub-sequence is mapped to the time-domain symbol mapped by the reference signal sub-sequence
  • the smallest numbered resource unit in the corresponding frequency domain resource, the element with the highest number in the second reference signal subsequence is mapped to the largest numbered resource unit in the frequency domain resource corresponding to the time domain symbol mapped by the reference signal subsequence.
  • a fifth aspect of the present application provides a network device for performing the reference signal transmission method of the second aspect described above, which has the same or similar technical features and technical effects.
  • the network equipment includes:
  • the transmitter is configured to send a first parameter set to the terminal device, where the first parameter set includes: the total number of reference signal sequences and the cyclic shift interval of the base sequence corresponding to the reference signal;
  • the receiver is configured to receive the reference signal generated by the terminal device according to the first parameter.
  • the first parameter set further includes: a cyclic shift start value corresponding to the reference signal.
  • the sending module is further configured to send at least one of the following to the terminal device:
  • Coverage level information of terminal equipment predefined sorted root sequence index value set, root sequence index value start value, cyclic shift start value, coverage division level information, resource mapping interval of reference signal or base corresponding to reference signal Sequence length N ZC .
  • a sixth aspect of the present application provides a terminal device for performing the codebook generating method of the third aspect, which has the same or similar technical features and technical effects.
  • the terminal device includes:
  • a processor used to obtain coverage level information and ordered codebook sets of the terminal device
  • the first preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number
  • the reference signal sequence number is the number of the reference signal sequence of the terminal device in the second sequence index subset
  • the codebook number is The corresponding number of the codeword in the codebook subset determined by the terminal device.
  • the terminal device includes:
  • a processor used to obtain coverage level information and ordered codebook sets of the terminal device
  • the second preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number
  • the root sequence index value number is the number of the root sequence index value of the terminal device in the second root sequence index value subset
  • the codebook The number is the corresponding number of the codeword in the codebook subset determined by the terminal device.
  • the terminal device includes:
  • a processor configured to determine the codebook number of the terminal device according to the reference signal sequence number and the third preset mapping relationship; determine the codebook corresponding to the codebook number in the sorted codebook set;
  • the third preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number, the reference signal sequence number is the number of the reference signal sequence of the terminal device in the first sequence index subset, and the codebook number is The codeword number in the sorted codebook collection.
  • the terminal device includes:
  • a processor configured to determine the codebook number of the terminal device according to the root sequence index value number and the fourth preset mapping relationship; determine the codebook corresponding to the codebook number in the sorted codebook set;
  • the fourth preset mapping relationship is the mapping relationship between the root sequence index value number and the codebook number.
  • the root sequence index value number is the number of the root sequence index value of the terminal device in the first root sequence index value subset, code This number is the codeword number in the sorted codebook set.
  • the first root sequence index value subset is determined by the terminal device according to the starting value of the root sequence index value and the first value, in a predefined sorted root sequence index value set, the first value The number of root sequence index values that can be selected by the terminal device.
  • the first value is determined by the terminal device according to a first parameter set.
  • the first parameter set includes: the total number of reference signal sequences, the cyclic shift interval of the base sequence corresponding to the reference signal, and the reference signal The length of the corresponding base sequence.
  • the second root sequence index value subset is obtained by the terminal device dividing the first root sequence index value subset according to the coverage level division information.
  • a seventh aspect of the present application provides a terminal device for performing the above-mentioned reference signal transmission method of the first aspect, which has the same or similar technical features and technical effects.
  • the terminal device includes:
  • the root sequence index value determination module is used to determine the root sequence index value of the terminal device according to the coverage level information of the terminal device and the predefined sorted root sequence index value set; the lower the coverage level of the terminal device, the root sequence of the terminal device The smaller the coverage indication value corresponding to the index value;
  • the reference signal generation module is used to generate the reference signal of the terminal device according to the root sequence index value of the terminal device
  • the sending module is used to send the reference signal to the network device.
  • the root sequence index value determination module includes:
  • the first value acquisition unit is used to determine the first value according to the first parameter set, where the first value is the number of root sequence index values selectable by the terminal device.
  • the first sequence index value subset acquisition unit is used to determine the first root sequence index value subset in the pre-defined sorted root sequence index value set according to the starting value of the root sequence index value and the first value, the first The subset of root sequence index values includes consecutive first numerical value root index values from the starting value of the root sequence index value;
  • the root sequence index value determining unit is used to determine the root sequence index value of the terminal device based on the coverage level information of the terminal device and the first root sequence index value subset.
  • the root sequence index value determination unit is specifically used for,
  • the first sequence index value subset is divided into the coverage level number and the second sequence index value subset; the coverage level division information is used to determine the coverage level number and coverage level interval;
  • the root sequence index value of the terminal device is determined according to the second root sequence index value subset corresponding to the coverage level interval corresponding to the coverage level of the terminal device.
  • the terminal device further includes:
  • the resource unit quantity acquisition module is used to determine the number N RE of the resource units used to transmit the reference signal according to the resource mapping interval of the reference signal;
  • the base sequence length acquisition module is used to determine the base sequence length N ZC corresponding to the reference signal according to N RE , where N ZC is a prime number not greater than N RE .
  • the terminal device further includes:
  • a set of root sequence index value obtaining module according to sequence length N ZC base reference signal corresponding to the determined root sequence index values of the set of predefined reference signal corresponding to a base sequence corresponding to the length N ZC sorted, root sequence index set of values
  • a root sequence index value of corresponds to a base sequence of length N ZC , which is a ZC sequence;
  • the reference signal generation module is specifically used to generate the reference signal of the terminal device according to the base sequence corresponding to the root sequence index value of the terminal device.
  • the reference signal generation module is specifically configured to use the base sequence corresponding to the root sequence index value of the terminal device as the reference signal sequence of the terminal device, and generate the reference of the terminal device according to the reference signal sequence of the terminal device Signal; or,
  • the base sequence corresponding to the root sequence index value of the terminal device is cyclically shifted to obtain the reference signal sequence of the terminal device, and the terminal device is generated according to the reference signal sequence of the terminal device Reference signal.
  • the first parameter set further includes: a cyclic shift start value corresponding to the reference signal; the terminal device further includes:
  • the receiving module is configured to receive the cyclic shift start value corresponding to the reference signal sent by the network device.
  • the reference signal sequence is continuously mapped on the resource unit for sending the reference signal in the frequency resource corresponding to the time domain symbol , And the number of spare resource units at both ends in the frequency resource corresponding to the time domain symbol differs by no more than 1;
  • the vacant resource unit is a resource unit to which reference signal sequences are not mapped among frequency resources used to transmit reference signals.
  • the reference signal when the resource unit used to send the reference signal is located in at least two time-domain symbols, the reference signal includes at least two reference signal subsequences, and the at least two reference signal subsequences are continuously mapped to Resource units used to send reference signals in frequency resources corresponding to different time-domain symbols;
  • the at least two reference signal sub-sequences there is at least one first reference signal sub-sequence and one second reference signal sub-sequence.
  • the element with the smallest number in the first reference signal sub-sequence is mapped to the time-domain symbol mapped by the reference signal sub-sequence
  • the smallest numbered resource unit in the corresponding frequency domain resource, the element with the highest number in the second reference signal subsequence is mapped to the largest numbered resource unit in the frequency domain resource corresponding to the time domain symbol mapped by the reference signal subsequence.
  • An eighth aspect of the present application provides a network device for performing the reference signal transmission method of the second aspect described above, which has the same or similar technical features and technical effects.
  • the network equipment includes:
  • a sending module configured to send a first parameter set to the terminal device, where the first parameter set includes: the total number of reference signal sequences and the cyclic shift interval of the base sequence corresponding to the reference signal;
  • the receiving module is configured to receive the reference signal generated by the terminal device according to the first parameter.
  • the first parameter set further includes: a cyclic shift start value corresponding to the reference signal.
  • the sending module is further configured to send at least one of the following to the terminal device:
  • Coverage level information of terminal equipment predefined sorted root sequence index value set, root sequence index value start value, cyclic shift start value, coverage division level information, resource mapping interval of reference signal or base corresponding to reference signal Sequence length N ZC .
  • a ninth aspect of the present application provides a terminal device for performing the codebook generation method of the third aspect, which has the same or similar technical features and technical effects.
  • the terminal device includes:
  • a codebook set acquisition module which is used to acquire coverage level information and ordered codebook sets of terminal devices
  • the codebook subset acquisition module is used to determine the codebook subset of the terminal device according to the coverage level of the terminal device and the sorted codebook set;
  • a codebook number determining module configured to determine the codebook number of the terminal device according to the reference signal sequence number and the first preset mapping relationship
  • a codebook determination module used to determine the codebook corresponding to the codebook number in the codebook subset
  • the first preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number
  • the reference signal sequence number is the number of the reference signal sequence of the terminal device in the second sequence index subset
  • the codebook number is The corresponding number of the codeword in the codebook subset determined by the terminal device.
  • the terminal device includes:
  • a codebook set acquisition module which is used to acquire coverage level information and ordered codebook sets of terminal devices
  • the codebook subset acquisition module is used to determine the codebook subset of the terminal device according to the coverage level of the terminal device and the sorted codebook set;
  • a codebook number determining module configured to determine the codebook number of the terminal device according to the reference signal sequence number and the second preset mapping relationship
  • a codebook determination module used to determine the codebook corresponding to the codebook number in the codebook subset
  • the second preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number
  • the root sequence index value number is the number of the root sequence index value of the terminal device in the second root sequence index value subset
  • the codebook The number is the corresponding number of the codeword in the codebook subset determined by the terminal device.
  • the terminal device includes:
  • a codebook number determining module configured to determine the codebook number of the terminal device according to the reference signal sequence number and the third preset mapping relationship
  • a codebook determination module used to determine the codebook corresponding to the codebook number in the sorted codebook set
  • the third preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number, the reference signal sequence number is the number of the reference signal sequence of the terminal device in the first sequence index subset, and the codebook number is The codeword number in the sorted codebook collection.
  • the terminal device includes:
  • a codebook number determination module used to determine the codebook number of the terminal device according to the root sequence index value number and the fourth preset mapping relationship
  • a codebook determination module used to determine the codebook corresponding to the codebook number in the sorted codebook set
  • the fourth preset mapping relationship is the mapping relationship between the root sequence index value number and the codebook number.
  • the root sequence index value number is the number of the root sequence index value of the terminal device in the first root sequence index value subset, code This number is the codeword number in the sorted codebook set.
  • the first root sequence index value subset is determined by the terminal device according to the starting value of the root sequence index value and the first value, in a predefined sorted root sequence index value set, the first value The number of root sequence index values that can be selected by the terminal device.
  • the first value is determined by the terminal device according to a first parameter set.
  • the first parameter set includes: the total number of reference signal sequences, the cyclic shift interval of the base sequence corresponding to the reference signal, and the reference signal The length of the corresponding base sequence.
  • the second root sequence index value subset is obtained by the terminal device dividing the first root sequence index value subset according to the coverage level division information.
  • a tenth aspect of the present application provides a communication system, including: the terminal device in any possible implementation manner of the fourth aspect and the sixth aspect, and the network device in any feasible implementation manner of the fifth aspect.
  • An eleventh aspect of the present application provides an electronic device, including: a processor, a memory, and a computer program;
  • the computer program is stored in the memory, and the processor runs the computer program to cause the electronic device to execute the reference signal transmission method according to any one of the above first and second aspects, and the codebook generation according to any one of the above third aspects method.
  • a twelfth aspect of the present application provides a computer storage medium.
  • the storage medium includes a computer program, and the computer program is used to implement the reference signal transmission method according to any one of the above first and second aspects, and as in the above third aspect The codebook generation method of any item.
  • a thirteenth aspect of the present application provides a computer program product.
  • the computer program product includes computer program code.
  • the computer program code When the computer program code is run on a computer, the computer executes the reference signal according to any one of the first aspect and the second aspect.
  • the transmission method, and the codebook generation method according to any one of the above-mentioned third aspects.
  • a fourteenth aspect of the present application provides a chip including a processor for running a computer program, so that the electronic device mounted with the chip executes the reference signal transmission method according to any one of the above first and second aspects, And the method of generating a codebook as described in any one of the above third aspects.
  • FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of this application.
  • FIG. 2 is a schematic flowchart 1 of a method for sending a reference signal provided by an embodiment of the present application
  • FIG. 3 is a second schematic flowchart of a method for sending a reference signal according to an embodiment of the present application
  • Figure 4 is a schematic diagram of comb information
  • FIG. 5 is a third schematic flowchart of a method for sending a reference signal according to an embodiment of the present application.
  • 6 is a schematic diagram of determining the number of coverage levels and coverage level intervals according to coverage level information
  • FIG. 7 is a schematic diagram 1 of reference signal sequence mapping
  • FIG. 8 is a second schematic diagram of reference signal sequence mapping
  • FIG. 9 is a fourth schematic flowchart of a method for sending a reference signal according to an embodiment of the present application.
  • FIG. 10 is a schematic flowchart 1 of a codebook generation method provided by an embodiment of this application.
  • FIG. 11 is a second schematic flowchart of a codebook generation method provided by an embodiment of the present application.
  • FIG. 12 is a schematic flowchart 3 of a codebook generation method provided by an embodiment of this application.
  • FIG. 13 is a fourth schematic flowchart of a codebook generation method provided by an embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of a terminal device according to Embodiment 1 of the present application.
  • FIG. 15 is a schematic structural diagram of a network device according to Embodiment 1 of the present application.
  • FIG. 16 is a schematic structural diagram of a terminal device according to Embodiment 2 of the present application.
  • FIG. 17 is a schematic structural diagram of a terminal device provided in Embodiment 3 of this application.
  • FIG. 18 is a schematic structural diagram of a terminal device according to Embodiment 4 of the present application.
  • FIG. 19 is a schematic structural diagram of a network device according to Embodiment 2 of the present application.
  • FIG. 20 is a schematic structural diagram of a terminal device according to Embodiment 5 of the present application.
  • FIG. 21 is a schematic structural diagram of a network device according to Embodiment 3 of the present application.
  • FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present application.
  • the communication system may include: a network device 10 and at least one terminal device 20.
  • the communication system provided by the embodiments of the present application may be used in a communication network with a large number of access devices, such as the Internet of Things and a vehicle network.
  • the terminal device may be a wireless terminal or a wired terminal
  • the wireless terminal may be a device that provides users with voice and / or other service data connectivity, a handheld device with a wireless connection function, or other processing connected to a wireless modem device.
  • the wireless terminal can communicate with one or more core networks via a radio access network (Radio Access Network, RAN).
  • the wireless terminal can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal For example, it may be a portable, pocket-sized, handheld, computer built-in or vehicle-mounted mobile device that exchanges language and / or data with the wireless access network.
  • the wireless terminal may also be called a system, a subscriber unit (Subscriber Unit), a subscriber station (Subscriber Station), a mobile station (Mobile Station), a mobile station (Mobile), a remote station (Remote Station), a remote terminal (Remote Terminal), an access terminal Access terminal (Access Terminal), user terminal (User Terminal), user agent (User Agent), this application is not limited here.
  • a network device is a device that connects a terminal device to a wireless network. It can be a base transceiver station (Base Transceiver Station, BTS) in the Global System for Mobile (GSM), Universal Mobile Communication System (Universal Base station (Node B) in Mobile Telecommunications System (UMTS), evolutionary base station (Evolutional Node B, eNB or eNodeB) in Long Term Evolution (LTE), or relay station or access point, or future fifth generation Base stations in the 5th Generation Mobile (Communication, 5G) network, or relay stations, access points, in-vehicle devices, wearable devices, etc. working in the high-frequency band, this application is not limited herein.
  • BTS Base Transceiver Station
  • GSM Global System for Mobile
  • Node B Universal Mobile Communication System
  • UMTS Mobile Telecommunications System
  • Evolutional Node B, eNB or eNodeB Evolution
  • future fifth generation Base stations in the 5th Generation Mobile (Communication, 5G) network,
  • the terminal device When a terminal device in a communication system communicates with a network device, the terminal device needs to send a reference signal to the network device, so that the network device distinguishes between the terminal device and different data blocks sent by the same terminal device according to different reference signals.
  • the existing reference signal is usually generated based on a pseudo-random PN sequence, but the reference signal sequence designed based on the PN sequence will affect the high-power data transmission of the terminal device due to the high PAPR.
  • the present application provides at least one method and device for sending reference signals in the following embodiments.
  • the following uses specific embodiments to describe in detail the reference signal sending method and device provided by the present application.
  • the same or similar concepts or processes may not be repeated in some embodiments.
  • FIG. 2 is a first schematic flowchart of a method for sending a reference signal according to an embodiment of the present application.
  • the terminal device determines the root sequence index value of the terminal device according to the coverage level information of the terminal device and the predefined sorted set of root sequence index values, and the lower the coverage level of the terminal device, the root sequence index of the terminal device The smaller the coverage association indication value corresponding to the value, the lower the correlation of the reference signal generated according to the sequence index value.
  • the reference signal sending method provided by this embodiment includes:
  • the terminal device determines the root sequence index value of the terminal device according to the coverage level information of the terminal device and the predefined sorted root sequence index value set.
  • the coverage level information of the terminal device indicates the coverage of the terminal device, and the lower the coverage level, the worse the coverage of the terminal device.
  • the method for acquiring the coverage level information of the terminal device may specifically be:
  • the network device sends signals to different terminal devices, and the transmission power of each transmitted signal is the same.
  • Each terminal device measures the received signal after wireless transmission loss to obtain measurement parameters, and obtains coverage level information according to the measurement parameters.
  • the terminal equipment in different locations has different coverage due to different wireless transmission losses.
  • the measurement parameters of the terminal device include at least one of the following: reference signal received power (Reference Signal Receiving Power, RSRP) value, Geometry (geometric metric) value or number and interference plus noise ratio (Signal to Interference plus Noise Ratio, SINR) value.
  • reference signal received power Reference Signal Receiving Power
  • RSRP Reference Signal Receiving Power
  • Geometry Geometric metric
  • SINR interference plus noise ratio
  • the terminal device stores at least one predefined sorted set of root sequence index values.
  • the generation of the reference signal will be described by taking the root sequence index value of the ZC sequence as an example.
  • the root sequence index value refers to q in the following formula 1 used to generate the ZC (Zadoff-Chu) sequence x q (m).
  • N zc represents the length of a ZC sequence, where 0 ⁇ m ⁇ N zc -1.
  • the coverage correlation indication value corresponding to a root sequence index value may be expressed as a PAPR (peak-to-average ratio) or CM (cubic metric) value of the ZC sequence generated by the root sequence index value.
  • PAPR peak-to-average ratio
  • CM cubic metric
  • Table 1 is a set of pre-defined sorted root sequence index values corresponding to a base sequence length of 31.
  • Table 2 is a set of pre-defined sorted root sequence index values corresponding to a base sequence length of 71.
  • the terminal device may determine the corresponding predefined sorted set of root sequence index values according to the length of the base sequence required for the reference signal to be generated.
  • the base sequence may refer to a ZC sequence generated by formula (1) with a root sequence index value.
  • the base sequence may also be a pseudo-random (PN) sequence determined by a random initialization.
  • PN pseudo-random
  • the value of the root sequence index value may be [1, 30].
  • Each root sequence index value corresponds to a coverage association indicator value.
  • the coverage association indication value may be the PAPR shown in Table 1 above.
  • the coverage association indication value may also be CM (cubic metric cubic metric value).
  • a large coverage association indicator value makes it difficult for a terminal device with poor coverage to perform high-power data transmission. Therefore, when configuring an available root sequence index value for a terminal device with poor coverage, pass Of the terminal devices select the root sequence index value with a smaller coverage indication value, so that the terminal device with poor coverage can also perform high-power data transmission when using the reference signal in this embodiment.
  • the root sequence index values are sorted in order from the largest to the smallest or the smallest to the largest in the coverage association indicator.
  • Table 1 takes the order of PAPR values from small to large as an example. Exemplarily, when the coverage level of the terminal device is lower, the root sequence index value with the smaller serial number can be selected in Table 1.
  • the terminal device generates a reference signal of the terminal device according to the root sequence index value of the terminal device.
  • a reference signal sequence is generated according to the root sequence index value, and then the reference signal sequence is mapped in the reference signal resource to obtain the reference signal.
  • the terminal device sends a reference signal to the network device.
  • the generated reference signal is sent to the network device.
  • the reference signal may be sent simultaneously with the data to be sent, or it may be sent separately.
  • the reference signal transmission method provided in this embodiment includes the terminal device determining the root sequence index value of the terminal device according to the coverage level information of the terminal device and the pre-defined sorted set of root sequence index values; the lower the coverage level of the terminal device, the terminal The device selects the root sequence index value corresponding to the smaller coverage association indication value; the terminal device generates a reference signal of the terminal device according to the root sequence index value of the terminal device; the terminal device sends the reference signal to the network device.
  • the terminal device with poor coverage can also perform high-power data when using the reference signal in this embodiment
  • the root sequence index value is sorted according to the size of the coverage association indication value, which facilitates the selection of the root sequence index value with a smaller coverage association indication value from multiple root sequence index values.
  • FIG. 3 is a second schematic flowchart of a method for sending a reference signal according to an embodiment of the present application.
  • a first subset of root sequence index values is determined from a predefined sorted root sequence index value set, and a root sequence index value is determined for the terminal device in the first root sequence index value subset.
  • the reference signal transmission method includes:
  • the terminal device determines the first value according to the first parameter set.
  • the first value is the number of root sequence index values selectable by the terminal device, and the first parameter set includes: the total number of reference signal sequences, the cyclic shift interval of the base sequence corresponding to the reference signal, and the length of the base sequence corresponding to the reference signal.
  • the greater the number of selectable root sequence index values of the terminal device correspondingly, the larger the set of selectable reference signal sequences, and the lower the probability of selecting the same reference signal sequence with other terminals, that is, the probability of reference signal sequence collision Lower.
  • the root sequence set corresponding to the first value can be shared by a group of terminal devices.
  • the terminal device set can be all terminals in a cell or a specific combination of terminals in the cell.
  • the first set of sequence index value subsets corresponding to different terminal devices belonging to the same cell may be the same or different.
  • the root sequence index value in the first subset of sequence index values corresponding to the terminal device needs to be determined first
  • the number is recorded as the first value.
  • the number of root sequence index values selectable by the cell to which the terminal device belongs may be used as the first numerical value.
  • the terminal device determines the first value according to the first parameter set.
  • the first parameter set includes: the total number of reference signal sequences, the cyclic shift interval of the base sequence corresponding to the reference signal, and the length of the base sequence corresponding to the reference signal.
  • the terminal device may determine the number of reference signal sequences corresponding to a root sequence index value according to the length of the base sequence corresponding to the reference signal and the cyclic shift interval of the base sequence corresponding to the reference signal.
  • the number of selectable root sequence index values is determined according to the total number of reference signal sequences and the number of reference signal sequences that a root sequence index value can correspond to.
  • an offset (or cyclic shift) sequence obtained by cyclic shifting a root sequence x q (m) of length N ZC is as follows:
  • n is the cyclic shift interval of the base sequence.
  • N ZC a base sequence of length N ZC can cyclically shift out N ZC shift sequences, but in practice, the selected cyclic shift interval is greater than n> 1. Obviously, the greater the cyclic shift interval, the root sequence The corresponding number of shift sequences is smaller.
  • the total number of reference sequences is 36
  • the first parameter set further includes: a cyclic shift start value corresponding to the reference signal.
  • the starting value of the cyclic shift corresponding to the reference signal may be configured by the network device.
  • the first parameter set can be sent by a system broadcast message, then the first parameter set can be shared by a terminal in a cell; the first parameter set can also be sent by user-specific resource reconfiguration information signaling (resource, reconfiguraiton, RRC), then the first The parameter set can be shared and shared by a specific terminal device;
  • the first parameter set may also be pre-defined.
  • the terminal device may determine a reference that the root sequence index value can correspond to based on the length of the base sequence corresponding to the reference signal, the cyclic shift interval of the base sequence corresponding to the reference signal, and the cyclic shift start value corresponding to the reference signal The number of signal sequences.
  • a root sequence index value is available. The value starts at 3 and ends at 30.
  • the method for acquiring the length of the base sequence corresponding to the reference signal may also be sent by the network device.
  • the length of the base sequence corresponding to another reference signal may be pre-defined.
  • Another way to obtain the length of the base sequence corresponding to the reference signal may be:
  • the terminal device determines the number N RE of resource units used to transmit the reference signal according to the resource mapping interval of the reference signal.
  • the resource mapping interval of the reference signal includes comb information comb of the reference signal.
  • the comb information includes a comb start position and a comb interval.
  • Figure 4 is a schematic diagram of comb information. As shown in FIG. 4, the comb interval is 2, when the starting position of the comb is 0, the reference signal is mapped in the first type of resource unit in FIG. 4; when the starting position of the comb is 1, the reference signal is mapped in In the second type of resource unit in 4.
  • the resource mapping of the reference signal is a continuous mapping.
  • the terminal device determines the number N RE of resource units used to transmit the reference signal according to the resource mapping interval of the reference signal and the frequency domain resource of the data channel.
  • the frequency domain resource of the data signal is consistent with the frequency domain resource of the reference signal.
  • the terminal device transmits the reference signal alone, the terminal device determines the number N RE of resource units used to transmit the reference signal according to the resource mapping interval of the reference signal and the dedicated resource for the reference signal.
  • the terminal device determines the base sequence length N ZC corresponding to the reference signal according to N RE , where N ZC is a prime number not greater than N RE .
  • the terminal device determines the base sequence length N ZC corresponding to the reference signal according to N RE .
  • N ZC is a prime number not greater than N RE .
  • N ZC is a maximum prime number not greater than N RE .
  • N RE is 36, N ZC may be 31.
  • the terminal device determines the first root sequence index value subset from the pre-defined sorted root sequence index value set according to the starting value of the root sequence index value and the first value.
  • the first subset of root sequence index values includes consecutive first numeric root sequence index values from the starting value of the root sequence index value.
  • the terminal device determines the first subset of sequence index values from the set of predefined sequenced root sequence index values
  • the terminal device selects the roots of the predefined sequence according to the starting value of the root sequence index value and the first value
  • the sequential first numerical root index value is taken from the sequence index value set as the first root index value subset.
  • the first root sequence index value subset when the initial value of the root sequence index value is 2 and the first value is 6, the first root sequence index value subset includes ⁇ 2, 3, 4, 5, 6, 7 ⁇ . Among them, 2-7 is the root sequence index value in Table 2, not the serial number value. According to the sorting information of the root sequence index value ⁇ 2, 3, 4, 5, 6, 7 ⁇ in the corresponding predefined index value set (or the corresponding serial number, in order from small to large), the first The root sequence index value subset ⁇ 5, 6, 4, 2, 3, 7 ⁇ , and the PAPR value corresponding to each root sequence index value gradually increases.
  • the terminal device determines the root sequence index value of the terminal device according to the coverage level information of the terminal device and the first root sequence index value subset.
  • the terminal device determines the root sequence index value of the terminal device according to the coverage level information of the terminal device in the first root sequence index value subset, as in the embodiment shown in FIG. 2, the lower the coverage level of the terminal device is determined The smaller the coverage association indication value corresponding to the root sequence index value of the terminal device of.
  • the coverage level of the terminal device is 2, and there are two coverage levels in the cell or group where the terminal device is located, the coverage level of the terminal device is determined to be a poor coverage level, and the corresponding root sequence with a smaller PAPR needs to be determined for the terminal device Index value.
  • the terminal device may select the root sequence index values of 5, 6, and 4.
  • the terminal device generates a reference signal of the terminal device according to the root sequence index value of the terminal device.
  • the terminal device sends a reference signal to the network device.
  • S204 and S205 in this embodiment are the same as S102 and S103 in the embodiment shown in FIG. 2, and details are not described in this application.
  • the terminal device determines the first value according to the first parameter set, and the terminal device uses the starting value of the root sequence index value and the first value in a predefined sorted set of root sequence index values Determine the first root sequence index value subset, the terminal device determines the root sequence index value of the terminal device based on the terminal device's coverage level information and the first root sequence index value subset, the terminal device determines the root sequence index value of the terminal device, The reference signal of the terminal device is generated, and the terminal device sends the reference signal to the network device.
  • the terminal device can select corresponding different coverages according to the coverage level in the first root sequence index value subset The root sequence index value of the associated indication value.
  • FIG. 5 is a third schematic flowchart of a reference signal sending method according to an embodiment of the present application.
  • the terminal device further divides the first sequence index value subset into the number of coverage levels and the second sequence index value subset according to the coverage level division information, and in the coverage level interval corresponding to the coverage level of the terminal device The corresponding second root sequence index value subset determines the root sequence index value of the terminal device.
  • the reference signal transmission method includes:
  • the terminal device determines the first value according to the first parameter set.
  • the terminal device determines the first root sequence index value subset from the pre-defined sorted root sequence index value set according to the starting value of the root sequence index value and the first value.
  • S301 and S302 in this embodiment are the same as S201 and S202 in the embodiment shown in FIG. 3, and details are not described in this application.
  • the terminal device divides the first sequence index subset into the number of coverage levels and the second sequence index subset according to the coverage level division information.
  • the coverage level division information is used to determine the number of coverage levels and coverage level intervals.
  • the coverage level division information may be used to determine the number of coverage levels and / or coverage level intervals.
  • the coverage level division information may include N thresholds, and the corresponding number of coverage levels is N + 1, where N is a positive integer.
  • the coverage level division information may specifically be an RSRP threshold, a Geometry threshold, or an SINR threshold.
  • the coverage level division information includes 4 RSRP thresholds as an example for schematic description.
  • the values of RSRP1 to RSRP4 in FIG. 6 increase or decrease sequentially.
  • the first sequence index subset ⁇ 5, 6, 4, 2, 3, 7 ⁇ can be divided into two consecutive segment sub Sets ⁇ 5, 6, 4 ⁇ and ⁇ 2, 3, 7 ⁇ .
  • the first sequence index subset when the first sequence index subset is divided into the number of coverage levels and the second sequence index subset, it may be divided evenly or unevenly.
  • the terminal device may determine the coverage level of the terminal device according to the measurement parameter and the coverage level division information. For example, the coverage level of the terminal device is determined by determining the coverage level interval where the measurement parameter of the terminal device is located. Optionally, by comparing the measurement parameter of the terminal device with the threshold value included in the coverage level division information, the coverage level interval where the measurement parameter of the terminal device is located can be determined.
  • the terminal device determines the root sequence index value of the terminal device according to the second root sequence index value subset corresponding to the coverage level interval corresponding to the coverage level of the terminal device.
  • the second root sequence index value subset corresponding to the terminal equipment may be determined according to the terminal equipment coverage level, and then the second root sequence index value value corresponding to the terminal equipment Centrally, determine the root sequence index value of the terminal device.
  • the terminal device may randomly select a root sequence index value in the second subset of sequence index values as the root sequence index value of the final generated reference signal sequence.
  • ⁇ 5, 6, 4 ⁇ is an optional root sequence index value for the first coverage level (low coverage)
  • ⁇ 2, 3, 7 ⁇ is an optional root sequence index value for the second coverage level (high coverage).
  • the terminal device determines the root sequence index value in ⁇ 5, 6, 4 ⁇ .
  • the terminal device may randomly select the root sequence index value in ⁇ 5, 6, 4 ⁇ .
  • the terminal device generates a reference signal of the terminal device according to the root sequence index value of the terminal device.
  • the terminal device sends a reference signal to the network device.
  • S305 and S306 in this embodiment are the same as S102 and S103 in the embodiment shown in FIG. 2, and details are not described in this application.
  • the terminal device further divides the first sequence index value subset into the number of coverage levels and the second sequence index value subset according to the coverage level division information, and covers A subset of the second root sequence index value corresponding to the coverage level interval corresponding to the level determines the root sequence index value of the terminal device.
  • different second-level sequence index value subsets are divided for terminal devices of different coverage levels, which facilitates the terminal device to select the root sequence index value in the corresponding second root sequence index value subset, avoiding all terminal devices directly Selecting the root sequence index value in the first subset of root sequence index values results in an unbalanced selection of root sequence index values, and the reference signal is likely to collide.
  • the base sequence corresponding to the reference signal is a ZC sequence.
  • the terminal device determines a predetermined sorted set of root sequence index values corresponding to N ZC according to the base sequence length N ZC corresponding to the reference signal, and a root sequence index value in the root sequence index value set corresponds to a length of N The base sequence of ZC .
  • the terminal device generates the reference signal of the terminal device according to the base sequence corresponding to the root sequence index value of the terminal device.
  • the generation of the reference signal according to the base sequence corresponding to the root sequence index value may have at least the following feasible implementation manners.
  • the first feasible implementation method :
  • the terminal device uses the base sequence corresponding to the root sequence index value of the terminal device as the reference signal sequence of the terminal device, and generates the reference signal of the terminal device according to the reference signal sequence of the terminal device.
  • the terminal device may directly use the base sequence corresponding to the root sequence index value of the terminal device as the reference signal sequence of the terminal device.
  • the terminal equipment cyclically shifts the base sequence corresponding to the root sequence index value of the terminal equipment according to the cyclic shift interval and / or cyclic shift start value of the base sequence to obtain the reference signal sequence of the terminal equipment, according to the reference of the terminal equipment
  • the signal sequence generates the reference signal of the terminal device.
  • the available cyclic offset sequence determined by the terminal device according to the cyclic shift start value and the cyclic shift interval of the base sequence may use the following formula 3 means.
  • n 0 is the cyclic shift start value
  • n CS is the cyclic shift (or offset) interval
  • p is an integer that the terminal device can randomly select
  • the correlation between the reference signals can be ensured to be low, and the correlation between the extended ZC sequence can be avoided to be high, thereby improving the detection performance of the terminal.
  • the cyclic shift interval of the base sequence can be configured by the network device.
  • the starting value of the cyclic shift may be configured by the network device, or may be predefined, for example, 0.
  • the reference signal sequence of the terminal device needs to be mapped into the time-domain symbol corresponding to the reference signal sequence of the terminal device to obtain the reference signal.
  • mapping method in detail for the difference in the number of time-domain symbols occupied by the reference signal sequence of the terminal device.
  • the reference signal sequence is continuously mapped on the resource unit used to transmit the reference signal in the frequency resource corresponding to the time-domain symbol, and the frequency resource corresponding to the time-domain symbol
  • the number of spare resource units at both ends of the middle does not differ by more than 1;
  • the vacant resource unit is a resource unit to which reference signal sequences are not mapped among frequency resources used to transmit reference signals.
  • FIG. 7 is a schematic diagram 1 of reference signal sequence mapping.
  • an intermediate mapping method may be used.
  • the reference signal sequence mapped to the intermediate N RE N resource units in the ZC resource units, and N RE vacant resource unit number of free resource units do not differ by more than two sides.
  • the number of spare resource units at both ends may be ceil [(N RE -N ZC ) / 2] and floor [(N RE -N ZC ) / 2] resource units, respectively.
  • the reference signal When the resource unit for transmitting the reference signal is located in at least two time-domain symbols, the reference signal includes at least two reference signal sub-sequences, and the at least two reference signal sub-sequences are continuously mapped in frequency resources corresponding to different time-domain symbols On the resource unit for sending reference signals;
  • the at least two reference signal sub-sequences there is at least one first reference signal sub-sequence and one second reference signal sub-sequence.
  • the element with the smallest number in the first reference signal sub-sequence is mapped to the time-domain symbol mapped by the reference signal sub-sequence
  • the smallest numbered resource unit in the corresponding frequency domain resource, the element with the highest number in the second reference signal subsequence is mapped to the largest numbered resource unit in the frequency domain resource corresponding to the time domain symbol mapped by the reference signal subsequence.
  • FIG. 8 is a second schematic diagram of reference signal sequence mapping.
  • the two-end mapping method may be used. At this time, as much as possible, each subcarrier on the frequency resource is mapped with an element of the reference signal sequence.
  • the reference signal includes at least two reference signal sub-sequences, and each reference signal sub-sequence is mapped in different time-domain symbols.
  • the two reference signal subsequences may be splitting one reference signal sequence into two reference signal subsequences, or may be copying one reference signal sequence as two reference signal subsequences.
  • the reference signal sub-sequence is continuously mapped, and is mapped on the upper or lower end of the occupied time domain symbol. And there is at least one first reference signal sub-sequence and one second reference signal sub-sequence.
  • the first reference signal subsequence may be mapped downward from the top of the resource unit corresponding to the time domain symbol, and the second reference signal subsequence may be mapped upward from the bottom of the resource unit corresponding to the time domain symbol.
  • a spare resource unit refers to a resource unit that does not have an element to which a reference signal sequence is mapped among resource units that can be used for sending reference signals.
  • FIG. 9 is a fourth schematic flowchart of a method for sending a reference signal according to an embodiment of the present application.
  • the execution subject of this method is the network device in the communication system shown in FIG. 1.
  • the reference signal transmission method includes:
  • the network device sends the first parameter set to the terminal device.
  • the first parameter set includes: the total number of reference signal sequences and the cyclic shift interval of the base sequence corresponding to the reference signal.
  • the first parameter set may also be pre-configured on the terminal device.
  • the network device receives the reference signal generated by the terminal device according to the first parameter.
  • the first parameter set further includes: a cyclic shift start value corresponding to the reference signal.
  • the network device also sends at least one of the following to the terminal device:
  • Coverage level information of terminal equipment predefined sorted root sequence index value set, root sequence index value start value, cyclic shift start value, coverage division level information, resource mapping interval of reference signal or base corresponding to reference signal Sequence length N ZC .
  • FIG. 10 is a first schematic flowchart of a codebook generation method according to an embodiment of the present application. As shown in FIG. 10, the codebook generation method includes:
  • the terminal device obtains the coverage level information of the terminal device and the ordered codebook (codeword or signature) set.
  • the coverage level information in this embodiment is the same as the coverage level information in any of the foregoing embodiments, and details are not described in this application.
  • the codebook is mainly used for symbol modulation or spreading of data channels. Different C i will lead to different coverage association indication values of the data channel.
  • C 1 [c 0 , c 1 , 0,0]
  • C 2 [c 0 , 0, c 1 , 0]
  • C 3 [c 0 , 0,0c 1 ,]
  • C 4 [0, c 0 , c 1 , 0]
  • C 5 [0, c 0 , 0, c 1 ]
  • C 6 [0,0, c 0 , c 1 ]
  • the terminal device determines the codebook subset of the terminal device according to the coverage level of the terminal device and the sorted codebook set.
  • the terminal device divides the sorted codebook set into a number of codebook subsets of the coverage level according to the coverage level division information.
  • the terminal device determines the codebook subset of the terminal device in multiple codebook subsets according to the coverage level of the terminal device.
  • the manner of dividing the codebook set according to the coverage level division information in this step is the same as the manner of dividing the first root sequence index value subset according to the coverage level division information in the foregoing embodiment.
  • the terminal device determines the codebook number of the terminal device according to the reference signal sequence number and the preset mapping relationship.
  • the preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number
  • the reference signal sequence number is the number of the reference signal sequence of the terminal device in the second subset of the sequence index value, which can be determined by the terminal device Preset.
  • the codebook number is the corresponding number of the codeword in the codebook subset determined by the terminal device.
  • Table 4 includes two coverage levels, and its second sequence index subset is divided into ⁇ 5,6,4 ⁇ and ⁇ 2,3,7 ⁇ .
  • the number of the N reference signal sequences corresponding to the set may be all 0 ⁇ N-1, and the codebook subsets of the two coverage levels are ⁇ C 1 , C 2 ⁇ and ⁇ C 3 , C 4 , C 5 , C 6 ⁇
  • the preset mapping relationship may be n mod 2 in Table 4, or n mod 4.
  • the codebook number of the terminal device can be determined by the reference signal sequence number n of the terminal device (n mod 2) +1, correspondingly, when the coverage level of the terminal device is 2,
  • the codebook number is determined by the reference signal sequence number n as (n mod 4) +3.
  • Table 4 Mapping between the reference sequence set and the codebook subset corresponding to the second subset of sequence index values
  • the terminal device determines the codebook corresponding to the codebook number in the codebook subset.
  • the terminal determines the codebook used in the corresponding codebook subset according to the coverage level and the selected reference signal sequence number, which is used for symbol modulation or spreading of the data channel, so that users with lower coverage levels use the lower coverage association indication value.
  • Codebooks correspondingly, users with higher coverage levels use codebooks with higher coverage association indication values to ensure the coverage performance of the data channel of the terminal, and also reduce the probability of collisions where different terminals use the same codebook.
  • FIG. 11 is a second schematic flowchart of a codebook generation method provided by an embodiment of the present application. As shown in FIG. 11, the codebook generation method includes:
  • the terminal device obtains the coverage level information and the ordered codebook set of the terminal device.
  • the terminal device determines a codebook subset of the terminal device according to the coverage level of the terminal device and the sorted codebook set.
  • the terminal device determines the codebook number of the terminal device according to the root sequence index value number and the second preset mapping relationship.
  • the second preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number
  • the root sequence index value number is the number of the root sequence index value of the terminal device in the second root sequence index value subset
  • the codebook The number is the corresponding number of the codeword in the codebook subset determined by the terminal device.
  • the second preset mapping relationship is the mapping relationship between the index value of the root sequence and the codebook number, as shown in Table 5 below.
  • the index numbers of R root sequences corresponding to different root sequence subsets may all be 0 to R-1.
  • Table 5 Mapping between the second sequence index subset and the codebook subset
  • the terminal device determines the codebook corresponding to the codebook number in the codebook subset.
  • the terminal device determines the codebook used for symbol modulation or spreading of the data channel, so that users with lower coverage levels use codebooks with lower coverage association indication values, and correspondingly, users with higher coverage levels
  • the use of a codebook with a high coverage association indication value ensures the coverage performance of the terminal's data channel, and also minimizes the probability of collision between different terminals using the same codebook.
  • FIG. 12 is a third schematic flowchart of a codebook generation method provided by an embodiment of the present application. As shown in FIG. 12, the codebook generation method includes:
  • the terminal device determines the codebook number of the terminal device according to the reference signal sequence number and the third preset mapping relationship.
  • the third preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number, the reference signal sequence number is the number of the reference signal sequence of the terminal device in the first sequence index subset, and the codebook number is The codeword number in the sorted codebook collection.
  • the third preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number, as shown in Table 6 below.
  • Table 6 Mapping between the reference sequence set and the codebook set corresponding to the first subset of sequence index values
  • the terminal device may search for a preset mapping relationship according to the determined reference signal sequence number to determine the codebook number of the terminal device of the terminal device.
  • the terminal device determines the codebook corresponding to the codebook number in the sorted codebook set.
  • S702 in this embodiment is the same as S504 in the embodiment shown in FIG. 10, and details are not described in this application.
  • the terminal device determines the codebook used for symbol modulation or spreading of the data channel, so that users with lower coverage levels use codebooks with lower coverage association indication values, and correspondingly, users with higher coverage levels
  • the use of a codebook with a high coverage association indication value ensures the coverage performance of the terminal's data channel, and also minimizes the probability of collision between different terminals using the same codebook.
  • FIG. 13 is a fourth schematic flowchart of a codebook generation method according to an embodiment of the present application. As shown in Figure 13, the codebook generation method includes:
  • the terminal device determines the codebook number of the terminal device according to the root sequence index value number and the fourth preset mapping relationship.
  • the fourth preset mapping relationship is the mapping relationship between the root sequence index value number and the codebook number.
  • the root sequence index value number is the number of the root sequence index value of the terminal device in the first root sequence index value subset, code This number is the codeword number in the sorted codebook set.
  • the fourth preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number, as shown in Table 7 below.
  • Table 7 Mapping between the first subset of sequence index values and the codebook set
  • the terminal device determines the codebook corresponding to the codebook number in the sorted codebook set.
  • S802 in this embodiment is the same as S504 in the embodiment shown in FIG. 10, and details are not described in this application.
  • the terminal device determines the codebook used for symbol modulation or spreading of the data channel, so that users with lower coverage levels use codebooks with lower coverage association indication values, and correspondingly, users with higher coverage levels
  • the use of a codebook with a high coverage association indication value ensures the coverage performance of the terminal's data channel, and also minimizes the probability of collision between different terminals using the same codebook.
  • the present application also provides a terminal device for performing the method for transmitting a reference signal on the terminal device side in any of the embodiments shown in FIGS. 2-9 above, which has the same or similar technical features and technical effects.
  • the terminal equipment includes:
  • the root sequence index value determination module 601 is used to determine the root sequence index value of the terminal device according to the coverage level information of the terminal device and the predefined sorted root sequence index value set; the lower the coverage level of the terminal device, the root of the terminal device The smaller the coverage indication value corresponding to the sequence index value;
  • the reference signal generation module 602 is used to generate the reference signal of the terminal device according to the root sequence index value of the terminal device;
  • the sending module 603 is used to send a reference signal to the network device.
  • the root sequence index value determination module 601 includes:
  • the first value acquiring unit 6011 is configured to determine a first value according to a first parameter set, where the first value is the number of root sequence index values selectable by the terminal device, and the first parameter set includes: the total number of reference signal sequences and the corresponding The cyclic shift interval of the base sequence and the length of the base sequence corresponding to the reference signal;
  • the first sequence index value subset acquisition unit 6012 is used to determine the first root sequence index value subset from the predefined sorted root sequence index value set according to the root sequence index value start value and the first value, the first A subset of the sequence index value includes the consecutive first numerical value and the root sequence index value from the starting value of the root sequence index value;
  • the root sequence index value determination unit 6013 is configured to determine the root sequence index value of the terminal device according to the coverage level information of the terminal device and the first subset of root sequence index values.
  • the root sequence index value determination unit 6013 is specifically used for,
  • the first sequence index value subset is divided into the coverage level number and the second sequence index value subset; the coverage level division information is used to determine the coverage level number and coverage level interval;
  • the root sequence index value of the terminal device is determined according to the second root sequence index value subset corresponding to the coverage level interval corresponding to the coverage level of the terminal device.
  • the terminal device also includes:
  • the resource unit number acquisition module 604 is used to determine the number N RE of resource units used to transmit the reference signal according to the resource mapping interval of the reference signal;
  • the base sequence length acquisition module 605 is used to determine the base sequence length N ZC corresponding to the reference signal according to N RE , where N ZC is a prime number not greater than N RE .
  • the terminal device also includes:
  • Root sequence index value set acquisition module 606 according to sequence length N ZC base reference signal corresponding to the determined root sequence index values of the set of predefined reference signal corresponding to a base sequence corresponding to the length N ZC sorted, root sequence index value set A root sequence index value in corresponds to a base sequence of length N ZC , and the base sequence is a ZC sequence;
  • the reference signal generation module 602 is specifically configured to generate the reference signal of the terminal device according to the base sequence corresponding to the root sequence index value of the terminal device.
  • the reference signal generation module 602 is specifically configured to use the base sequence corresponding to the root sequence index value of the terminal device as the reference signal sequence of the terminal device, and generate the reference signal of the terminal device according to the reference signal sequence of the terminal device; or,
  • the base sequence corresponding to the root sequence index value of the terminal device is cyclically shifted to obtain the reference signal sequence of the terminal device, and the terminal device is generated according to the reference signal sequence of the terminal device Reference signal.
  • the first parameter set further includes: a cyclic shift start value corresponding to the reference signal; the terminal device further includes:
  • the receiving module 607 is configured to receive the cyclic shift start value corresponding to the reference signal sent by the network device.
  • the reference signal sequence is continuously mapped on the resource unit used to transmit the reference signal in the frequency resource corresponding to the time domain symbol, and the time domain symbol
  • the number of spare resource units at both ends of the corresponding frequency resource differs by no more than 1;
  • the vacant resource unit is a resource unit to which reference signal sequences are not mapped among frequency resources used to transmit reference signals.
  • the reference signal when the resource unit used to send the reference signal is located in at least two time-domain symbols, the reference signal includes at least two reference signal sub-sequences, and the at least two reference signal sub-sequences are respectively mapped to different time-domain symbols Of the frequency resources in the resource unit used to send the reference signal;
  • the at least two reference signal sub-sequences there is at least one first reference signal sub-sequence and one second reference signal sub-sequence.
  • the element with the smallest number in the first reference signal sub-sequence is mapped to the time-domain symbol mapped by the reference signal sub-sequence
  • the smallest numbered resource unit in the corresponding frequency domain resource, the element with the highest number in the second reference signal subsequence is mapped to the largest numbered resource unit in the frequency domain resource corresponding to the time domain symbol mapped by the reference signal subsequence.
  • the present application also provides a network device for performing the method for transmitting a reference signal on the network device side in the foregoing embodiment, which has the same or similar technical features and technical effects.
  • the network equipment includes:
  • the sending module 701 is configured to send a first parameter set to the terminal device, where the first parameter set includes: the total number of reference signal sequences and the cyclic shift interval of the base sequence corresponding to the reference signal;
  • the receiving module 702 is configured to receive the reference signal generated by the terminal device according to the first parameter.
  • the first parameter set further includes: a cyclic shift start value corresponding to the reference signal.
  • the sending module 701 is further configured to send at least one of the following to the terminal device:
  • Coverage level information of terminal equipment predefined sorted root sequence index value set, root sequence index value start value, cyclic shift start value, coverage division level information, resource mapping interval of reference signal or base corresponding to reference signal Sequence length N ZC .
  • the present application also provides a terminal device for performing the codebook generation method on the terminal device side in the foregoing embodiment, which has the same or similar technical features and technical effects.
  • the terminal equipment includes:
  • the codebook set acquisition module 801 is used to acquire coverage level information and sorted codebook sets of terminal devices;
  • the codebook subset acquisition module 802 is used to determine the codebook subset of the terminal device according to the coverage level of the terminal device and the sorted codebook set;
  • the codebook number determination module 803 is used to determine the codebook number of the terminal device according to the reference signal sequence number and the first preset mapping relationship;
  • the codebook determination module 804 is used to determine the codebook corresponding to the codebook number in the codebook subset
  • the first preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number
  • the reference signal sequence number is the number of the reference signal sequence of the terminal device in the second sequence index subset
  • the codebook number is The corresponding number of the codeword in the codebook subset determined by the terminal device.
  • the present application also provides a terminal device for performing the codebook generation method on the terminal device side in the foregoing embodiment, which has the same or similar technical features and technical effects.
  • the terminal device includes:
  • the codebook set acquisition module 801 is used to acquire coverage level information and sorted codebook sets of terminal devices;
  • the codebook subset acquisition module 802 is used to determine the codebook subset of the terminal device according to the coverage level of the terminal device and the sorted codebook set;
  • the codebook number determination module 803 is used to determine the codebook number of the terminal device according to the reference signal sequence number and the second preset mapping relationship;
  • the codebook determination module 804 is used to determine the codebook corresponding to the codebook number in the codebook subset
  • the second preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number
  • the root sequence index value number is the number of the root sequence index value of the terminal device in the second root sequence index value subset
  • the codebook The number is the corresponding number of the codeword in the codebook subset determined by the terminal device.
  • the present application also provides a terminal device for performing the codebook generation method on the terminal device side in the foregoing embodiment, which has the same or similar technical features and technical effects.
  • the terminal equipment includes:
  • the codebook number determination module 901 is used to determine the codebook number of the terminal device according to the reference signal sequence number and the third preset mapping relationship;
  • the codebook determination module 902 is used to determine the codebook corresponding to the codebook number in the sorted codebook set;
  • the third preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number, the reference signal sequence number is the number of the reference signal sequence of the terminal device in the first sequence index subset, and the codebook number is The codeword number in the sorted codebook collection.
  • the present application also provides a terminal device for performing the codebook generation method on the terminal device side in the foregoing embodiment, which has the same or similar technical features and technical effects.
  • the terminal device includes:
  • the codebook number determination module 901 is used to determine the codebook number of the terminal device according to the root sequence index value number and the fourth preset mapping relationship;
  • the codebook determination module 902 is used to determine the codebook corresponding to the codebook number in the sorted codebook set;
  • the fourth preset mapping relationship is the mapping relationship between the root sequence index value number and the codebook number.
  • the root sequence index value number is the number of the root sequence index value of the terminal device in the first root sequence index value subset, code This number is the codeword number in the sorted codebook set.
  • the first subset of root sequence index values is determined by the terminal device based on the starting value of the root sequence index value and the first value, in a predefined sorted set of root sequence index values, the first value is selectable by the terminal device
  • the number of root sequence index values of, the first value is determined by the terminal device according to the first parameter set, the first parameter set includes: the total number of reference signal sequences, the cyclic shift interval of the base sequence corresponding to the reference signal and the length of the base sequence corresponding to the reference signal .
  • the second root sequence index value subset is obtained by the terminal device dividing the first root sequence index value subset according to the coverage level division information.
  • the present application also provides a terminal device for performing the method for transmitting a reference signal on the terminal device side in any of the embodiments shown in FIGS. 2-9 above, which has the same or similar technical features and technical effects.
  • the terminal equipment includes:
  • the processor 1001 is configured to determine the root sequence index value of the terminal device according to the coverage level information of the terminal device and the predefined sorted root sequence index value set; The smaller the value of the coverage association indicator;
  • the processor 1001 is further configured to generate a reference signal of the terminal device according to the root sequence index value of the terminal device;
  • the transmitter 1002 is used to send a reference signal to a network device.
  • the processor 1001 is specifically used for,
  • the first value is determined according to the first parameter set.
  • the first value is the number of root sequence index values selectable by the terminal device.
  • the first parameter set includes: the total number of reference signal sequences, the cyclic shift interval of the base sequence corresponding to the reference signal and the reference The length of the base sequence corresponding to the signal;
  • a first subset of the index value of the root sequence is determined from the set of pre-defined sorted root sequence index values.
  • the root sequence index value of the terminal device is determined according to the coverage level information of the terminal device and the first root sequence index value subset.
  • the processor 1001 is specifically used for,
  • the first sequence index value subset is divided into the coverage level number and the second sequence index value subset; the coverage level division information is used to determine the coverage level number and coverage level interval;
  • the root sequence index value of the terminal device is determined according to the second root sequence index value subset corresponding to the coverage level interval corresponding to the coverage level of the terminal device.
  • the processor 1001 is further configured to determine the number N RE of resource units used to transmit the reference signal according to the resource mapping interval of the reference signal;
  • N RE determine the length of the base sequence corresponding to the reference signal N ZC , where N ZC is a prime number not greater than N RE .
  • the processor 1001 is further configured to determine, according to the base sequence length N ZC corresponding to the reference signal, the pre-defined sorted set of root sequence index values corresponding to the base sequence length N ZC corresponding to the reference signal, and the set of root sequence index values A root sequence index value in corresponds to a base sequence of length N ZC , and the base sequence is a ZC sequence;
  • the reference signal of the terminal device is generated according to the base sequence corresponding to the root sequence index value of the terminal device.
  • the processor 1001 is specifically configured to use the base sequence corresponding to the root sequence index value of the terminal device as the reference signal sequence of the terminal device, and generate the reference signal of the terminal device according to the reference signal sequence of the terminal device; or,
  • the base sequence corresponding to the root sequence index value of the terminal device is cyclically shifted to obtain the reference signal sequence of the terminal device, and the terminal device is generated according to the reference signal sequence of the terminal device Reference signal.
  • the first parameter set further includes: a cyclic shift start value corresponding to the reference signal; the terminal device further includes:
  • the receiver 1003 is configured to receive the cyclic shift start value corresponding to the reference signal sent by the network device.
  • the reference signal sequence is continuously mapped on the resource unit used to transmit the reference signal in the frequency resource corresponding to the time domain symbol, and the time domain symbol
  • the number of spare resource units at both ends of the corresponding frequency resource differs by no more than 1;
  • the vacant resource unit is a resource unit to which reference signal sequences are not mapped among frequency resources used to transmit reference signals.
  • the reference signal when the resource unit used to send the reference signal is located in at least two time-domain symbols, the reference signal includes at least two reference signal sub-sequences, and the at least two reference signal sub-sequences are respectively mapped to different time-domain symbols Of the frequency resources in the resource unit used to send the reference signal;
  • the at least two reference signal sub-sequences there is at least one first reference signal sub-sequence and one second reference signal sub-sequence.
  • the element with the smallest number in the first reference signal sub-sequence is mapped to the time-domain symbol mapped by the reference signal sub-sequence
  • the smallest numbered resource unit in the corresponding frequency domain resource, the element with the highest number in the second reference signal subsequence is mapped to the largest numbered resource unit in the frequency domain resource corresponding to the time domain symbol mapped by the reference signal subsequence.
  • the present application also provides a network device for performing the method for sending a reference signal on the network device side in the embodiments shown in FIGS. 2-9, and having the same or similar technical features and technical effects.
  • FIG. 19 is a schematic structural diagram of a network device according to Embodiment 2 of the present application. As shown in Figure 19, the network equipment includes:
  • the transmitter 1101 is configured to send a first parameter set to the terminal device, where the first parameter set includes: the total number of reference signal sequences and the cyclic shift interval of the base sequence corresponding to the reference signal;
  • the receiver 1102 is configured to receive the reference signal generated by the terminal device according to the first parameter.
  • the first parameter set further includes: a cyclic shift start value corresponding to the reference signal.
  • the sending module 1101 is further configured to send at least one of the following to the terminal device:
  • Coverage level information of terminal equipment predefined sorted root sequence index value set, root sequence index value start value, cyclic shift start value, coverage division level information, resource mapping interval of reference signal or base corresponding to reference signal Sequence length N ZC .
  • the present application also provides a terminal device for performing the codebook generation method on the terminal device side in the foregoing embodiment, which has the same or similar technical features and technical effects.
  • the terminal device includes:
  • the processor 1001 is configured to obtain coverage level information and ordered codebook sets of the terminal device;
  • the first preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number
  • the reference signal sequence number is the number of the reference signal sequence of the terminal device in the second sequence index subset
  • the codebook number is The corresponding number of the codeword in the codebook subset determined by the terminal device.
  • the present application also provides a terminal device for performing the codebook generation method on the terminal device side in the foregoing embodiment, which has the same or similar technical features and technical effects.
  • the terminal device includes:
  • the processor 1001 is configured to obtain coverage level information and ordered codebook sets of the terminal device;
  • the second preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number
  • the root sequence index value number is the number of the root sequence index value of the terminal device in the second root sequence index value subset
  • the codebook The number is the corresponding number of the codeword in the codebook subset determined by the terminal device.
  • the present application also provides a terminal device for performing the codebook generation method on the terminal device side in the foregoing embodiment, which has the same or similar technical features and technical effects.
  • the terminal device includes:
  • the processor 1001 is configured to determine the codebook number of the terminal device according to the reference signal sequence number and the third preset mapping relationship; determine the codebook corresponding to the codebook number in the sorted codebook set;
  • the third preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number, the reference signal sequence number is the number of the reference signal sequence of the terminal device in the first sequence index subset, and the codebook number is The codeword number in the sorted codebook collection.
  • the present application also provides a terminal device for performing the codebook generation method on the terminal device side in the foregoing embodiment, which has the same or similar technical features and technical effects.
  • the terminal device includes:
  • the processor 1001 is configured to determine the codebook number of the terminal device according to the root sequence index value number and the fourth preset mapping relationship; determine the codebook corresponding to the codebook number in the sorted codebook set;
  • the fourth preset mapping relationship is the mapping relationship between the root sequence index value number and the codebook number.
  • the root sequence index value number is the number of the root sequence index value of the terminal device in the first root sequence index value subset, code This number is the codeword number in the sorted codebook set.
  • the first subset of root sequence index values is determined by the terminal device based on the starting value of the root sequence index value and the first value, in a predefined sorted set of root sequence index values, the first value is selectable by the terminal device
  • the number of root sequence index values of, the first value is determined by the terminal device according to the first parameter set, the first parameter set includes: the total number of reference signal sequences, the cyclic shift interval of the base sequence corresponding to the reference signal and the length of the base sequence corresponding to the reference signal .
  • the second root sequence index value subset is obtained by the terminal device dividing the first root sequence index value subset according to the coverage level division information.
  • FIG. 20 is a schematic structural diagram of a terminal device according to Embodiment 5 of the present application. As shown in FIG. 19, the terminal device includes a processor 1201, a memory 1202, a communication interface 1203, and a bus 1204; where,
  • the processor 1201, the memory 1202 and the communication interface 1203 are connected through the bus 1204 and complete mutual communication.
  • the memory 1202 is used to store computer-executed instructions.
  • the processor 1201 executes the computer-executed instructions in the memory 1202 to use
  • the hardware resources in the device perform the steps in the reference signal sending method corresponding to FIGS. 2-9, and the steps in the codebook generating method corresponding to FIGS. 10-12.
  • FIG. 21 is a schematic structural diagram of a network device according to Embodiment 3 of the present application.
  • the network device includes a processor 1301, a memory 1302, a communication interface 1303, and a bus 1304; wherein, the processor 1301, the memory 1302, and the communication interface 1303 are connected through the bus 1304 to complete communication with each other, and the memory 1302 Is used to store computer-executed instructions.
  • the processor 1301 executes the computer-executed instructions in the memory 1302 to use the hardware resources in the device to perform the steps in the reference signal transmission method corresponding to FIGS. 2-9, and FIGS. 10-12. The steps in the corresponding codebook generation method.
  • the present application also provides a communication system, including: at least one terminal device as shown in FIG. 18 and a network device as shown in FIG. 19.
  • This application also provides an electronic device, including: a processor, a memory, and a computer program;
  • the computer program is stored in the memory, and the processor runs the computer program so that the electronic device executes the reference signal transmission method in any of the embodiments shown in FIGS. 2-9 above, and in any of the embodiments shown in FIGS. 10-13 Codebook generation method.
  • the present application also provides a computer storage medium.
  • the storage medium includes a computer program.
  • the computer program is used to implement the reference signal transmission method in any of the embodiments shown in FIGS. 2-9 above, and any of the programs shown in FIGS. 10-13.
  • a codebook generation method in an embodiment.
  • the present application also provides a computer program product.
  • the computer program product includes computer program code.
  • the computer program product causes the computer to execute the reference signal transmission method in any of the embodiments shown in FIGS. 2-9 above. , And the codebook generation method in any of the embodiments shown in FIGS. 10-13.
  • the present application also provides a chip including a processor for running a computer program, so that the electronic device mounted with the chip executes the reference signal transmission method in any of the embodiments shown in FIGS. 2-9 above, and The codebook generation method in any of the embodiments shown in 10-13.
  • At least one refers to one or more, and “multiple” refers to two or more.
  • “And / or” describes the relationship of the related objects, indicating that there can be three relationships, for example, A and / or B, which can mean: A exists alone, A and B exist at the same time, B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the related object is a "or” relationship.
  • “At least one of the following” or a similar expression refers to any combination of these items, including any combination of a single item or a plurality of items.
  • At least one item (a) in a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be a single or multiple .
  • the processors involved in the embodiments of the present application may be general-purpose processors, digital signal processors, application specific integrated circuits, field programmable gate arrays or other programmable logic devices, discrete gates or transistor logic devices, and discrete hardware components, which may be implemented or Perform the disclosed methods, steps, and logical block diagrams in the embodiments of the present application.
  • the general-purpose processor may be a microprocessor or any conventional processor.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied and executed by a hardware processor, or may be executed and completed by a combination of hardware and software modules in the processor.
  • the memory involved in the embodiments of the present application may be a non-volatile memory, such as a hard disk (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), for example Random access memory (random-access memory, RAM).
  • the memory is any other medium that can be used to carry or store the desired program code in the form of instructions or data structure transmission and can be accessed by the computer, but is not limited thereto.
  • the disclosed device and method may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the units is only a division of logical functions.
  • there may be other divisions for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be electrical, mechanical, or other forms of transmission.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware transmission, or in the form of hardware plus software functional units.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a dedicated computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, computer, server or data center Transmit to another website, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device including a server, a data center, and the like integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, Solid State Disk (SSD)) or the like.
  • a magnetic medium for example, a floppy disk, a hard disk, a magnetic tape
  • an optical medium for example, a DVD
  • a semiconductor medium for example, Solid State Disk (SSD)

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Abstract

L'invention concerne un procédé et un dispositif d'envoi de signal de référence. Le procédé comprend les étapes suivantes : un dispositif terminal détermine une valeur d'indice de séquence racine du dispositif terminal en fonction d'informations du niveau de couverture du dispositif terminal et d'un ensemble prédéfini de valeurs d'indice de séquence racine ordonnées ; plus le niveau de couverture du dispositif terminal est faible, plus une valeur d'indication associée à la couverture, qui correspond à la valeur d'indice de séquence racine du dispositif terminal, est petite ; et le dispositif terminal génère et envoie un signal de référence en fonction de la valeur d'indice de séquence racine du dispositif terminal. Dans les modes de réalisation de la présente invention, une valeur d'indice de séquence racine ayant une plus petite valeur d'indication associée à la couverture est sélectionnée pour un dispositif terminal ayant une plus faible couverture, de telle sorte que le dispositif terminal ayant la plus faible couverture peut émettre des données à forte puissance tout en utilisant le signal de référence dans ce mode de réalisation. De plus, les valeurs d'indice de séquence racine sont ordonnées en fonction de la grandeur de la valeur d'indication associée à la couverture, ce qui facilite la sélection d'une valeur d'indice de séquence racine ayant une plus petite valeur d'indication associée à la couverture parmi les multiples valeurs d'indice de séquence racine.
PCT/CN2019/117209 2018-11-09 2019-11-11 Procédé et dispositif d'envoi de signal de référence WO2020094155A1 (fr)

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