Communication method and related device

Abstract

The present application provides a communication method and a related device. In the method, a first device determines a symbol group and sends the symbol group. The symbol group comprises a first cyclic prefix (CP), N time domain symbols and M second CPs; the N time domain symbols comprise M time domain symbols; each of the M time domain symbols is preceded by a second CP; the duration of the first CP is related to a first difference; the first difference is the difference between a preset duration and the total duration of the M second CPs; N is a positive integer greater than 1, and M is a positive integer greater than 0 and less than or equal to N. On the basis of the above solution, by adding a second CP before at least one symbol in the symbol group and defining the relationship between the second CPs before some symbols in the symbol group and the first CP before the first symbol, inter-symbol interference between symbol groups corresponding to different devices can be reduced, thereby enhancing orthogonality.

Description

A communication method and related equipment

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on April 3, 2024, with application number 202410417464.6 and application name “A Communication Method and Related Equipment”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communications, and in particular to a communication method and related equipment. Background Art

[0003] In wireless communications, devices often accumulate more energy by repeatedly transmitting signals to combat penetration loss in standard coverage or to compensate for insufficient transmission power. For example, consider the single-frequency signal transmitted over the narrowband physical random access channel (NPRACH). NPRACH channels achieve coverage enhancement by repeating signals, with the number of repetitions being 1, 2, 4, 8, 16, 32, 64, or 128.

[0004] In order to allow multiple devices to reuse the NPRACH channel, an orthogonal cover code (OCC) is introduced on the NPRACH channel. The original intention was to achieve orthogonality of the NPRACH through OCC, thereby reducing mutual interference when multiple devices reuse the NPRACH channel. However, under normal circumstances, there are time delay differences (also known as timing deviations) between multiple devices, which results in incomplete orthogonality of the single-frequency signal achieved through OCC. In other words, even if multiple devices reuse the NPRACH through OCC, interference will still occur.

[0005] Therefore, when multiple devices multiplex a single-frequency signal through OCC, how to reduce interference between the multiple devices is a technical problem that needs to be solved urgently. Summary of the Invention

[0006] The present application provides a communication method and related equipment. By adding a second CP before at least one symbol in a symbol group and limiting the relationship between the second CP before some symbols of the symbol group and the first CP before the first symbol, the inter-symbol interference between corresponding symbol groups of different devices can be reduced, thereby improving the orthogonal effect.

[0007] In a first aspect, a communication method is provided. The method can be applied to a first device, such as a terminal or a communication module in a terminal, or a circuit or chip in a terminal responsible for communication functions (such as a modem chip, also known as a baseband chip, or a system on chip (SoC) chip or system in package (SIP) chip containing a modem core); or, for example, a network device, or a chip or circuit in a network device, or a central unit (CU) or distributed unit (DU) in a network device, or a functional module in a network device that can call and execute a program.

[0008] In this method, a first device determines a symbol group and transmits the symbol group. The symbol group includes: a first cyclic prefix (CP), N time-domain symbols, and M second cyclic prefix (CPs), the N time-domain symbols include M time-domain symbols, each of the M time-domain symbols is preceded by a second CP, the duration of the first CP is related to a first difference, and the first difference is the difference between a preset duration and the total duration of the M second CPs, N is a positive integer greater than 1, and M is a positive integer greater than 0 and less than or equal to N.

[0009] Based on the above scheme, by adding a second CP before at least one symbol in the symbol group and limiting the relationship between the second CP before some symbols of the symbol group and the first CP before the first symbol, the inter-symbol interference between the corresponding symbol groups of different devices can be reduced, thereby improving the orthogonal effect.

[0010] Optionally, in a possible implementation manner of the first aspect, the above steps further include: acquiring configuration information, where the configuration information is used to indicate a resource set of the symbol group, and the resource set includes a set of time domain and / or frequency domain resources.

[0011] In this possible implementation, a resource set of a symbol group is obtained through configuration information, so that a receiving device can detect the symbol group at a corresponding time position according to the configured resource set, thereby improving the detection performance of the symbol group.

[0012] In a second aspect, a communication method is provided. The method can be applied to a second device, such as a terminal or a communication module in a terminal, or a circuit or chip in a terminal responsible for communication functions (such as a modem chip, also known as a baseband chip, or a system on chip (SoC) chip or system in package (SIP) chip containing a modem core); or, for example, a network device, or a chip or circuit in a network device, or a central unit (CU) or distributed unit (DU) in a network device, or a functional module in a network device that can call and execute a program.

[0013] In the method, a symbol group is received and processed according to the symbol group. The symbol group includes: a first cyclic prefix (CP) and N time-domain symbols, the N time-domain symbols include M time-domain symbols, each of the M time-domain symbols is preceded by a second CP, the duration of the first CP is related to a first difference, the first difference is the difference between a preset duration and the total duration of the M second CPs, N is a positive integer greater than 1, and M is a positive integer greater than 0 and less than or equal to N;

[0014] Based on the above scheme, by adding a second CP before at least one symbol in the symbol group and limiting the relationship between the second CP before some symbols of the symbol group and the first CP before the first symbol, the inter-symbol interference between the corresponding symbol groups of different devices can be reduced, thereby improving the orthogonal effect.

[0015] Optionally, in a possible implementation of the second aspect, before the above step: receiving the first signal on the symbol group, the method also includes: sending configuration information, the configuration information is used to indicate a resource set of the symbol group, and the resource set includes a set of time domain and / or frequency domain resources.

[0016] In this possible implementation, a resource set of a symbol group is obtained through configuration information, so that a receiving device can detect the symbol group at a corresponding time position according to the configured resource set, thereby improving the detection performance of the symbol group.

[0017] Optionally, in a possible implementation of the first aspect or the second aspect, the above-mentioned step: processing according to the symbol group includes: detecting a first signal after the first CP in the symbol group, where the first signal is a reference signal or a time domain signal of a data channel.

[0018] In this possible implementation, adding a CP during transmission ensures a "circular" convolution between the transmitted signal and the channel response. The receiver can then apply a simple multiplication to capture the energy of all delayed components, avoiding energy loss.

[0019] Optionally, in a possible implementation manner of the first aspect or the second aspect, the first CP is located before the first time domain symbol in the N time domain symbols, and the second CP is located before each time domain symbol in the M time domain symbols.

[0020] In this possible implementation, by introducing CP before the time domain symbol, a "circular" convolution can be created between the signal carried by the symbol group and the channel, thereby improving the orthogonality of time domain symbols transmitted by multiple devices and avoiding energy loss.

[0021] Optionally, in a possible implementation manner of the first aspect or the second aspect, the duration of the first CP is related to the first difference, including: the duration of the first CP is equal to the first difference.

[0022] In this possible implementation method, it can be understood that a part of the time length is borrowed from the preset time length as the second CP time length of the time domain symbol, thereby increasing the cyclic prefix effect of each time domain symbol and improving the orthogonal effect of time domain symbols transmitted by multiple devices.

[0023] Optionally, in a possible implementation manner of the first aspect or the second aspect, the M time domain symbols include the 2nd time domain symbol to the Nth time domain symbol in the N time domain symbols, and M=N-1.

[0024] In this possible implementation, the second CP is not added before the first time-domain symbol, which is equivalent to reducing the portion of the preset duration "borrowed." In theory, the less the preset duration "borrowed," the stronger the coverage of the signal carried by the symbol group. This further reduces the impact on the coverage radius of the signal carried by the symbol group, thereby improving the orthogonality between the time-domain symbols transmitted by each device.

[0025] Optionally, in a possible implementation manner of the first aspect or the second aspect, a signal of the first CP and a first time domain symbol among the N time domain symbols satisfies the following conditions:

[0026] Among them, s i (t) represents the signal of the first CP and the first time domain symbol, i is used to identify the symbol group, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the symbol group, T CP Indicates the duration of the first CP, T CP0Indicates the duration of the second CP, and T1 indicates the preset duration.

[0027] This possible implementation, on the one hand, provides a baseband signal generation method that borrows a portion of the preset duration as the second cyclic prefix of the time-domain symbol, thereby improving the orthogonality between time-domain symbols transmitted by each device. On the other hand, the signal corresponding to the portion of the symbol group to which the second CP is not added can be expressed using the above expression.

[0028] Optionally, in a possible implementation manner of the first aspect or the second aspect, signals of M time domain symbols among the N time domain symbols satisfy the following conditions:

[0029] Among them, s i (t) represents the signal of M time domain symbols, i is used to identify the symbol group, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the symbol group, T CP Indicates the duration of the first CP, T CP0 Indicates the duration of the second CP, and T1 indicates the preset duration.

[0030] In this possible implementation, a baseband signal generation method is provided, in which there is no need to add a second CP before the first time domain symbol, which is equivalent to reducing the part borrowed from the preset time length. In theory, the less the preset time length is borrowed, the stronger the coverage range of the signal carried by the symbol group.

[0031] Optionally, in a possible implementation of the first aspect or the second aspect, the above M=N.

[0032] In this possible implementation, it is equivalent to adding a second CP before each of the N time domain symbols. This method can further increase the orthogonality effect between the symbols.

[0033] Optionally, in a possible implementation of the first aspect or the second aspect, the signal of the first CP satisfies the following conditions:

[0034] Among them, s i (t) represents the signal of the first CP, i is used to identify the symbol group, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the symbol group, T CP Indicates the duration of the first CP, T CP0 Indicates the duration of the second CP.

[0035] This possible implementation, on the one hand, provides a baseband signal generation method that borrows a portion of the preset duration as the second cyclic prefix of the time-domain symbol, thereby improving the orthogonality between the time-domain symbols transmitted by each device. On the other hand, the signal corresponding to the first CP can be expressed using the above expression.

[0036] Optionally, in a possible implementation manner of the first aspect or the second aspect, the signals of the N time domain symbols satisfy the following conditions:

[0037] Among them, s i (t) represents a signal of N time domain symbols, i is used to identify the symbol group, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the symbol group, T CP Indicates the duration of the first CP, T CP0 Indicates the duration of the second CP, and T1 indicates the preset duration.

[0038] This possible implementation, on the one hand, provides a baseband signal generation method that borrows a portion of the preset duration as the second cyclic prefix of the time-domain symbol, thereby improving the orthogonality between the time-domain symbols transmitted by each device. On the other hand, the signal corresponding to N time-domain symbols can be expressed using the above expression.

[0039] Optionally, in a possible implementation of the first aspect or the second aspect, the aforementioned devices with different capabilities, or devices supporting different protocol versions, have different resource sets.

[0040] In this possible implementation, by setting different resource sets for different devices, interference between symbol groups transmitted by different devices can be reduced.

[0041] Optionally, in a possible implementation manner of the first aspect or the second aspect, the above-mentioned different resource sets are different, including any one of the following: different time domain resources, different frequency domain resources, or different time-frequency resources.

[0042] In this possible implementation, for example, taking different time domain resources as an example, the interference introduced by the time domain can be reduced, and the effect of each device transmitting a symbol group or signal can be improved.

[0043] Optionally, in a possible implementation of the first aspect or the second aspect, the R symbols in the above-mentioned symbol group are generated according to a first sequence and a first signal, R is a positive integer not greater than N, and the first signal is a reference signal or a time domain signal of a data channel.

[0044] In this possible implementation, the first signal can be adjusted using the first sequence to meet the requirements for the symbol group carrying signal in different situations. For example, when the first sequence is an OCC sequence, the orthogonal effect can be further improved.

[0045] Optionally, in a possible implementation manner of the first aspect or the second aspect, the above-mentioned R symbols are M time domain symbols, or the R symbols are N time domain symbols.

[0046] In this possible implementation, some time domain symbols may carry the adjusted signal, or all N time domain symbols may carry the adjusted signal, thereby meeting the needs of various scenarios.

[0047] Optionally, in a possible implementation of the first aspect or the second aspect, each of the above-mentioned R symbols is multiplied with each element in the first sequence, and each symbol is used to carry a signal obtained by multiplying the corresponding element with the first signal.

[0048] In this possible implementation, a specific multiplication method is provided to adjust the first symbol. For example, the orthogonal effect of symbol groups sent by different devices can be achieved through multiplication.

[0049] Optionally, in a possible implementation of the first aspect or the second aspect, the symbol group is used to carry a random access signal, and the value of N is 5, and the duration of each time domain symbol is 8192T. s , the default duration is 2048T s , where T s is the basic time unit; or, the value of N is 5, the duration of each time domain symbol is 8192T s , the preset duration is 8192T s , where T s is the basic time unit; or, the value of N is 3, the duration of each time domain symbol is 24576T s , the preset duration is 24576T s , where T s It is the basic time unit.

[0050] In this possible implementation, in a random access scenario, different signal formats can be adapted to improve the scope of application.

[0051] Optionally, in a possible implementation manner of the first aspect or the second aspect, the duration of the second CP is predefined or configured by signaling.

[0052] In this possible implementation, the second CP can be flexibly configured based on actual needs. For example, to minimize signal coverage, the second CP duration can be shortened, borrowing less from the preset duration. Alternatively, to enhance subsequent orthogonal effects, the second CP duration can be lengthened, borrowing more from the preset duration.

[0053] Optionally, in a possible implementation of the first aspect or the second aspect, the signal carried in the above-mentioned symbol group includes at least one of the following: a random access signal, a downlink synchronization signal, a channel sounding signal SRS, a channel state reference signal CSI-RS, a time domain symbol corresponding to a control channel, or a time domain symbol corresponding to a data channel.

[0054] This possible implementation can be applied to transmission scenarios of multiple signals, thereby reducing mutual interference generated by multiple signals during transmission on different devices.

[0055] In a third aspect, a communication method is provided. The method can be applied to a first device, such as a terminal or a communication module in a terminal, or a circuit or chip in a terminal responsible for communication functions (such as a modem chip, also known as a baseband chip, or a system on chip (SoC) chip or system in package (SIP) chip containing a modem core); or, for example, a network device, or a chip or circuit in a network device, or a central unit (CU) or distributed unit (DU) in a network device, or a functional module in a network device that can call and execute a program.

[0056] In this method, a first device determines a second signal and sends the second signal. The second signal includes a third cyclic prefix (CP) of the second symbol and the second symbol, the duration of the second symbol is equal to the sum of the durations of N third symbols, and the subcarrier spacing of the second symbol is 1 / N of the subcarrier spacing of the third symbol, where N is a positive integer greater than or equal to 2.

[0057] Based on this solution, the original N time-domain symbols are converted into a second signal, with the subcarrier spacing of the second signal being 1 / Nth of the original time-domain symbols, resulting in a duration N times longer. This means that the time-domain side length and frequency domain are narrowed. This approach allows devices to select more frequency domain positions during the signal orthogonalization process, even if there is time-domain overlap, thereby improving orthogonality.

[0058] Optionally, in a possible implementation manner of the third aspect, the above steps include: obtaining configuration information, where the configuration information is used to indicate a resource set of the second signal, and the resource set includes a set of time domain and / or frequency domain resources.

[0059] In this possible implementation, the resource set of the second signal is obtained through configuration information, so that the receiving device can detect the second signal at a corresponding time position according to the configured resource set, thereby improving the detection performance of the second signal.

[0060] In a fourth aspect, a communication method is provided. The method can be applied to a second device, such as a terminal or a communication module in a terminal, or a circuit or chip in a terminal responsible for a communication function (such as a modem chip, also known as a baseband chip, or a system on chip (SoC) chip or system in package (SIP) chip containing a modem core); or, for example, a network device, or a chip or circuit in a network device, or a central unit (CU) or distributed unit (DU) in a network device, or a functional module in a network device that can call and execute a program.

[0061] In this method, the second device receives a second signal, which includes a third cyclic prefix CP of the second symbol and the second symbol, the duration of the second symbol is equal to the sum of the durations of N third symbols, and the subcarrier spacing of the second symbol is 1 / N of the subcarrier spacing of the third symbol, where N is a positive integer greater than or equal to 2.

[0062] Based on this solution, the original N time-domain symbols are converted into a second signal, with the subcarrier spacing of the second signal being 1 / Nth of the original time-domain symbols, resulting in a duration N times longer. This means that the time-domain side length and frequency domain are narrowed. This approach allows devices to select more frequency domain positions during the signal orthogonalization process, even if there is time-domain overlap, thereby improving orthogonality.

[0063] Optionally, in a possible implementation of the third aspect, the above step: before receiving the second signal, the method also includes: sending configuration information, the configuration information is used to indicate a resource set of the second signal, and the resource set includes a set of time domain and / or frequency domain resources.

[0064] In this possible implementation, the resource set of the second signal is obtained through configuration information, so that the receiving device can detect the second signal at a corresponding time position according to the configured resource set, thereby improving the detection performance of the second signal.

[0065] Optionally, in a possible implementation of the third aspect or the fourth aspect, the bandwidth of the second symbol is the subcarrier spacing of the third symbol.

[0066] In this possible implementation, by reducing the bandwidth of the second symbol, more frequency domain resources for transmission signals of more devices can be provided in the bandwidth of the third symbol, that is, the interference problem caused by frequency domain overlap is reduced by narrowing the frequency domain.

[0067] Optionally, in a possible implementation of the third aspect or the fourth aspect, the frequency domain position of the above-mentioned second symbol is on the bandwidth of the subcarrier spacing of the third symbol, and the subcarrier spacing of the second symbol occupies a first frequency domain position among the N frequency domain positions.

[0068] In this possible implementation, the second symbol can only occupy the bandwidth of the third symbol subcarrier interval, and only one first frequency domain position can be used to complete the transmission of the existing N time domain symbols, thereby leaving more frequency domain positions for other devices to select and reducing interference in signals transmitted between different devices.

[0069] Optionally, in a possible implementation manner of the third aspect or the fourth aspect, no signal is sent at other frequency domain positions other than the above-mentioned first frequency domain position.

[0070] In this possible implementation, the first device can complete the transmission of the existing N time domain symbols using only one first frequency domain position, and other frequency domain positions are not used by the first device, thereby leaving more frequency domain positions for other devices to select, reducing interference in signals transmitted between different devices.

[0071] Optionally, in a possible implementation of the third aspect or the fourth aspect, the subcarrier spacing of the above-mentioned third symbol includes any one of the following: 1.25 kHz, 3.75 kHz, 2.5 kHz, 5 kHz, 6.5 kHz, 10 kHz or 15 kHz.

[0072] In this possible implementation, transmission processing with smaller subcarrier spacing can be performed for various existing subcarrier spacing scenarios, thereby improving the applicability of the solution.

[0073] Optionally, in a possible implementation of the third aspect or the fourth aspect, the second signal satisfies the following conditions:

[0074] Among them, s i(t) represents the second signal, i is used to identify the symbol group where the second symbol is located, m represents a parameter for determining the frequency domain resource position of the first signal, m is an integer, β represents an amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the second symbol, T CP represents the duration of the third CP, and T2 represents the duration of the second symbol.

[0075] In this possible implementation, when the duration of the cyclic prefix is ​​not equal to that of the time domain symbol, a baseband method for generating a second signal is provided to reduce the interference problem caused by frequency domain overlap by narrowing the subcarrier spacing.

[0076] Optionally, in a possible implementation of the third aspect or the fourth aspect, the second signal satisfies the following conditions:

[0077] Among them, s i (t) represents the signal of the second symbol, i is used to identify the symbol group where the second symbol is located, m represents the parameter for determining the frequency domain resource position of the first signal, m is an integer, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the second symbol, T CP represents the duration of the third CP, and T2 represents the duration of the second symbol.

[0078] In this possible implementation, when the duration of the cyclic prefix is ​​equal to that of the time domain symbol, a baseband method for generating a second signal is provided to reduce interference problems caused by frequency domain overlap by narrowing the subcarrier spacing.

[0079] Optionally, in a possible implementation of the third aspect or the fourth aspect, the above-mentioned T CP =T2.

[0080] This possible implementation method can be applied to a scenario where the third CP duration is the same as the second symbol duration. This method can regard the third CP as a special second symbol, thereby facilitating calculations.

[0081] Optionally, in a possible implementation of the third aspect or the fourth aspect, the aforementioned devices with different capabilities, or devices supporting different protocol versions, have different resource sets.

[0082] In this possible implementation, by setting different resource sets for different devices, interference between symbol groups transmitted by different devices can be reduced.

[0083] Optionally, in a possible implementation manner of the third aspect or the fourth aspect, the above-mentioned different resource sets are different, including any one of the following: different time domain resources, different frequency domain resources, or different time-frequency resources.

[0084] In this possible implementation, for example, taking different time domain resources as an example, the interference introduced by the time domain can be reduced, and the effect of each device transmitting a symbol group or signal can be improved.

[0085] In a fifth aspect, the present application provides a communication device, which may specifically be a first device, such as a terminal or a communication module in a terminal, or a circuit or chip in the terminal responsible for the communication function (such as a modem chip, also known as a baseband chip, or a system on chip (SoC) chip or system in package (SIP) chip containing a modem core); or, for example, a network device, or a chip or circuit in a network device, or a central unit (CU) or distributed unit (DU) in a network device, or a functional module in a network device that can call and execute a program.

[0086] The communication device includes: a transceiver unit and a processing unit.

[0087] A processing unit is configured to determine a symbol group. The symbol group includes: a first cyclic prefix (CP), N time-domain symbols, and M second cyclic prefix (CPs), the N time-domain symbols include M time-domain symbols, each of the M time-domain symbols is preceded by a second CP, a duration of the first CP is related to a first difference, and the first difference is a difference between a preset duration and a total duration of the M second CPs, N is a positive integer greater than 1, and M is a positive integer greater than 0 and less than or equal to N.

[0088] The transceiver unit is configured to send the symbol group.

[0089] Optionally, in a possible implementation of the fifth aspect, the above-mentioned transceiver unit is further used to obtain configuration information, where the configuration information is used to indicate a resource set of the symbol group, and the resource set includes a set of time domain and / or frequency domain resources.

[0090] In a sixth aspect, a communication method is provided. The method can be applied to a second device, such as a terminal or a communication module in a terminal, or a circuit or chip in a terminal responsible for a communication function (such as a modem chip, also known as a baseband chip, or a system on chip (SoC) chip or system in package (SIP) chip containing a modem core); or, for example, a network device, or a chip or circuit in a network device, or a central unit (CU) or distributed unit (DU) in a network device, or a functional module in a network device that can call and execute a program.

[0091] The communication device includes: a transceiver unit and a processing unit.

[0092] A transceiver unit, configured to receive a symbol group. The symbol group includes: a first cyclic prefix (CP) and N time-domain symbols, the N time-domain symbols include M time-domain symbols, each of the M time-domain symbols is preceded by a second CP, a duration of the first CP is related to a first difference, the first difference being a difference between a preset duration and a total duration of the M second CPs, N being a positive integer greater than 1, and M being a positive integer greater than 0 and less than or equal to N;

[0093] A processing unit is used to perform processing based on the symbol group.

[0094] Optionally, in a possible implementation of the sixth aspect, the above-mentioned transceiver unit is further used to send configuration information, where the configuration information is used to indicate a resource set of a symbol group, and the resource set includes a set of time domain and / or frequency domain resources.

[0095] Optionally, in a possible implementation of the fifth aspect or the sixth aspect, the above-mentioned processing unit is specifically used to detect a first signal after the first CP in the symbol group, where the first signal is a reference signal or a time domain signal of a data channel.

[0096] Optionally, in a possible implementation manner of the fifth aspect or the sixth aspect, the first CP is located before the first time domain symbol in the N time domain symbols, and the second CP is located before each time domain symbol in the M time domain symbols.

[0097] Optionally, in a possible implementation manner of the fifth aspect or the sixth aspect, the duration of the first CP is related to the first difference, including: the duration of the first CP is equal to the first difference.

[0098] Optionally, in a possible implementation of the fifth aspect or the sixth aspect, the above-mentioned M time domain symbols include the 2nd time domain symbol to the Nth time domain symbol in the N time domain symbols, and M=N-1.

[0099] Optionally, in a possible implementation manner of the fifth aspect or the sixth aspect, a signal of the first CP and a first time domain symbol among the N time domain symbols satisfies the following conditions:

[0100] Among them, s i (t) represents the signal of the first CP and the first time domain symbol, i is used to identify the symbol group, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the symbol group, T CP Indicates the duration of the first CP, T CP0 Indicates the duration of the second CP, and T1 indicates the preset duration.

[0101] Optionally, in a possible implementation manner of the fifth aspect or the sixth aspect, signals of M time domain symbols among the N time domain symbols satisfy the following conditions:

[0102] Among them, s i (t) represents the signal of M time domain symbols, i is used to identify the symbol group, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the symbol group, T CP Indicates the duration of the first CP, T CP0 Indicates the duration of the second CP, and T1 indicates the preset duration.

[0103] Optionally, in a possible implementation of the fifth aspect or the sixth aspect, the above M=N.

[0104] Optionally, in a possible implementation manner of the fifth aspect or the sixth aspect, the signal of the first CP satisfies the following conditions:

[0105] Among them, s i (t) represents the signal of the first CP, i is used to identify the symbol group, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the symbol group, T CP Indicates the duration of the first CP, T CP0 Indicates the duration of the second CP.

[0106] Optionally, in a possible implementation manner of the fifth aspect or the sixth aspect, the signals of the N time domain symbols satisfy the following conditions:

[0107] Among them, s i (t) represents a signal of N time domain symbols, i is used to identify the symbol group, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the symbol group, T CP Indicates the duration of the first CP, T CP0 Indicates the duration of the second CP, and T1 indicates the preset duration.

[0108] Optionally, in a possible implementation of the fifth aspect or the sixth aspect, the above-mentioned devices with different capabilities, or devices supporting different protocol versions, have different resource sets.

[0109] Optionally, in a possible implementation of the fifth aspect or the sixth aspect, the above-mentioned different resource sets are different, including any one of the following: different time domain resources, different frequency domain resources, or different time-frequency resources.

[0110] Optionally, in a possible implementation of the fifth aspect or the sixth aspect, the R symbols in the above-mentioned symbol group are generated according to a first sequence and a first signal, R is a positive integer not greater than N, and the first signal is a reference signal or a time domain signal of a data channel.

[0111] Optionally, in a possible implementation of the fifth aspect or the sixth aspect, the above-mentioned R symbols are M time domain symbols, or the R symbols are N time domain symbols.

[0112] Optionally, in a possible implementation of the fifth aspect or the sixth aspect, each of the above-mentioned R symbols is multiplied with each element in the first sequence, and each symbol is used to carry a signal obtained by multiplying the corresponding element with the first signal.

[0113] Optionally, in a possible implementation of the fifth aspect or the sixth aspect, the symbol group is used to carry a random access signal, and the value of N is 5, and the duration of each time domain symbol is 8192T. s , the default duration is 2048T s , where T s is the basic time unit; or, the value of N is 5, the duration of each time domain symbol is 8192T s , the preset duration is 8192T s , where T s is the basic time unit; or, the value of N is 3, the duration of each time domain symbol is 24576T s , the preset duration is 24576T s , where T s It is the basic time unit.

[0114] Optionally, in a possible implementation manner of the fifth aspect or the sixth aspect, the duration of the second CP is predefined or configured by signaling.

[0115] Optionally, in a possible implementation of the fifth aspect or the sixth aspect, the signal carried in the above-mentioned symbol group includes at least one of the following: a random access signal, a downlink synchronization signal, a channel sounding signal SRS, a channel state reference signal CSI-RS, a time domain symbol corresponding to a control channel, or a time domain symbol corresponding to a data channel.

[0116] In the seventh aspect of the present application, a communication device is provided, which may specifically be a first device, such as a terminal or a communication module in a terminal, or a circuit or chip in the terminal responsible for the communication function (such as a modem chip, also known as a baseband chip, or a system on chip (SoC) chip or system in package (SIP) chip containing a modem core); or, for example, a network device, or a chip or circuit in a network device, or a central unit (CU) or distributed unit (DU) in a network device, or a functional module in a network device that can call and execute a program.

[0117] The communication device includes: a transceiver unit and a processing unit.

[0118] a processing unit, configured to determine a second signal, wherein the second signal includes a third cyclic prefix (CP) of the second symbol and the second symbol, the duration of the second symbol is equal to the sum of the durations of N third symbols, and the subcarrier spacing of the second symbol is 1 / N of the subcarrier spacing of the third symbol, where N is a positive integer greater than or equal to 2;

[0119] The transceiver unit is configured to send a second signal.

[0120] Optionally, in a possible implementation of the seventh aspect, the above-mentioned transceiver unit is also used to obtain configuration information, where the configuration information is used to indicate a resource set of the second signal, and the resource set includes a set of time domain and / or frequency domain resources.

[0121] In an eighth aspect of the present application, a communication device is provided, which may specifically be a second device, such as a terminal or a communication module in a terminal, or a circuit or chip in the terminal responsible for the communication function (such as a modem chip, also known as a baseband chip, or a system on chip (SoC) chip or system in package (SIP) chip containing a modem core); or, for example, a network device, or a chip or circuit in a network device, or a central unit (CU) or distributed unit (DU) in a network device, or a functional module in a network device that can call and execute programs.

[0122] The communication device includes: a transceiver unit.

[0123] A transceiver unit is used to receive a second signal, where the second signal includes a third cyclic prefix CP of the second symbol and the second symbol, the duration of the second symbol is equal to the sum of the durations of N third symbols, and the subcarrier spacing of the second symbol is 1 / N of the subcarrier spacing of the third symbol, where N is a positive integer greater than or equal to 2.

[0124] Optionally, in a possible implementation of the eighth aspect, the above-mentioned transceiver unit is also used to send configuration information, where the configuration information is used to indicate a resource set of the second signal, and the resource set includes a set of time domain and / or frequency domain resources.

[0125] Optionally, in a possible implementation of the seventh aspect or the eighth aspect, the bandwidth of the second symbol is the subcarrier spacing of the third symbol.

[0126] Optionally, in a possible implementation of the seventh aspect or the eighth aspect, the frequency domain position of the above-mentioned second symbol is on the bandwidth of the subcarrier spacing of the third symbol, and the subcarrier spacing of the second symbol occupies a first frequency domain position among the N frequency domain positions.

[0127] Optionally, in a possible implementation of the seventh aspect or the eighth aspect, no signal is sent at other frequency domain positions other than the above-mentioned first frequency domain position.

[0128] Optionally, in a possible implementation of the seventh aspect or the eighth aspect, the subcarrier spacing of the above-mentioned third symbol includes any one of the following: 1.25 kHz, 3.75 kHz, 2.5 kHz, 5 kHz, 6.5 kHz, 10 kHz or 15 kHz.

[0129] Optionally, in a possible implementation of the seventh aspect or the eighth aspect, the second signal satisfies the following conditions:

[0130] Among them, s i (t) represents the second signal, i is used to identify the symbol group where the second symbol is located, m represents a parameter for determining the frequency domain resource position of the first signal, m is an integer, β represents an amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the second symbol, T CP represents the duration of the third CP, and T2 represents the duration of the second symbol.

[0131] Optionally, in a possible implementation of the seventh aspect or the eighth aspect, the second signal satisfies the following conditions:

[0132] Among them, s i (t) represents the signal of the second symbol, i is used to identify the symbol group where the second symbol is located, m represents the parameter for determining the frequency domain resource position of the first signal, m is an integer, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the second symbol, T CP represents the duration of the third CP, and T2 represents the duration of the second symbol.

[0133] Optionally, in a possible implementation of the seventh aspect or the eighth aspect, the above-mentioned T CP =T2.

[0134] Optionally, in a possible implementation of the seventh aspect or the eighth aspect, the above-mentioned devices with different capabilities, or devices supporting different protocol versions, have different resource sets.

[0135] Optionally, in a possible implementation of the seventh aspect or the eighth aspect, the above-mentioned different resource sets are different, including any one of the following: different time domain resources, different frequency domain resources, or different time-frequency resources.

[0136] In the ninth aspect of the present application, a communication device is provided, comprising at least one processor coupled to at least one memory; the at least one memory is used to store programs or instructions; the at least one processor is used to execute the programs or instructions so that the device implements a method of any possible implementation method in the aforementioned first aspect, or implements a method of any possible implementation method in the aforementioned third aspect.

[0137] In the tenth aspect of the present application, a communication device is provided, comprising at least one processor, wherein the at least one processor is coupled to at least one memory; the at least one memory is used to store programs or instructions; the at least one processor is used to execute the programs or instructions so that the device implements a method of any possible implementation method in the aforementioned second aspect, or implements a method of any possible implementation method in the aforementioned fourth aspect.

[0138] In the eleventh aspect of the present application, a communication device is provided, comprising at least one logic circuit and at least one input / output interface; the logic circuit is used to execute the method described in any possible implementation of the first aspect, or the method described in any possible implementation of the third aspect.

[0139] The twelfth aspect of the present application provides a communication device, comprising at least one logic circuit and at least one input and output interface; the logic circuit is used to execute a method as described in any possible implementation of the second aspect, or a method as described in any possible implementation of the fourth aspect.

[0140] The thirteenth aspect of the present application provides a communication system, which includes a communication device of any possible implementation method of the fifth aspect and a communication device of any possible implementation method of the sixth aspect, or includes a communication device of any possible implementation method of the seventh aspect and a communication device of any possible implementation method of the eighth aspect, or includes a communication device of any possible implementation method of the ninth aspect and a communication device of any possible implementation method of the tenth aspect, or includes a communication device of any possible implementation method of the eleventh aspect and a communication device of any possible implementation method of the twelfth aspect.

[0141] In the fourteenth aspect of the present application, a computer-readable storage medium is provided, which is used to store one or more computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor executes the method described in any possible implementation of any aspect of the first to fourth aspects above.

[0142] The fifteenth aspect of the present application provides a computer program product (or computer program). When the computer program in the computer program product is executed by the processor, the processor executes the method described in any possible implementation of any one of the first to fourth aspects above.

[0143] In the sixteenth aspect, the present application provides a chip or a chip system, which includes at least one processor for supporting a communication device to implement the method described in any possible implementation method of any aspect of the first to fourth aspects.

[0144] In one possible design, the chip system may also include at least one memory for storing program instructions and data necessary for the communication device. The chip system may be composed of a chip or may include a chip and other discrete components. Optionally, the chip system also includes an interface circuit that provides program instructions and / or data to at least one processor.

[0145] Among them, the technical effects brought about by any design method in the fifth to sixteenth aspects can refer to the technical effects brought about by the different design methods in the above-mentioned first to fourth aspects, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0146] FIG1 is a schematic diagram of a communication system involved in this application;

[0147] FIG2A is another schematic diagram of the communication system involved in this application;

[0148] FIG2B is another schematic diagram of the communication system involved in this application;

[0149] FIG2C is another schematic diagram of the communication system involved in this application;

[0150] FIG2D is another schematic diagram of the communication system involved in this application;

[0151] FIG3 is a schematic diagram of repeated transmission of a symbol group involved in this application;

[0152] FIG4 is a schematic diagram of the delay difference between different terminals involved in this application;

[0153] FIG5 is a flow chart of the communication method involved in this application;

[0154] 6A to 8B are several schematic diagrams of symbol groups involved in this application;

[0155] FIG9 is another schematic diagram of a flow chart of the communication method involved in this application;

[0156] FIG10 is a schematic diagram of a third symbol involved in this application;

[0157] FIG11 is a schematic diagram showing a comparison of the second symbol and the third symbol involved in this application;

[0158] 12 to 15 are several schematic diagrams of the communication device involved in this application. DETAILED DESCRIPTION

[0159] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0160] The technical solutions provided in this application can be applied to various communication systems, such as: fifth generation (5G) or new radio (NR) systems, long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, etc. The technical solutions provided in this application can also be applied to future communication systems, such as sixth generation (6G) mobile communication systems. The technical solutions provided in this application can also be applied to device to device (D2D) communication, vehicle to everything (V2X) communication, machine to machine (M2M) communication, machine type communication (MTC), and Internet of Things (IoT) communication systems. The technical solutions provided in this application can also be applied to non-terrestrial network (NTN) systems such as intersatellite communication and satellite communication.

[0161] As an example, a satellite communication system includes a satellite base station and terminal devices. The satellite base station provides communication services to the terminal devices. The satellite base station can also communicate with other base stations. Satellites can function as both base stations and terminal devices. Satellites can refer to drones, hot air balloons, low-orbit satellites, medium-orbit satellites, high-orbit satellites, and other satellites. Satellites can also refer to non-ground base stations or non-ground devices.

[0162] As an example, V2X communication may include vehicle-to-vehicle (V2V) communication, vehicle-to-roadside infrastructure (V2I) communication, vehicle-to-pedestrian (V2P) communication, and vehicle-to-network (V2N) communication.

[0163] A device in a communication system can send signals to or receive signals from another device. The signals may include reference signals, information, signaling, or data. The term "device" may also be replaced by an entity, a network entity, a communication device, a communication module, a node, a communication node, and the like.

[0164] The terminal devices in the embodiments of the present application include various devices with wireless communication functions, which can be used to connect people, objects, machines, etc. The terminal devices can be widely used in various scenarios, such as: cellular communication, D2D, V2X, peer to peer (P2P), M2M, MTC, IoT, virtual reality (VR), augmented reality (AR), industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearable, smart transportation, smart city drones, robots, remote sensing, passive sensing, positioning, navigation and tracking, autonomous delivery, etc. The terminal device can be a terminal in any of the above scenarios, such as an MTC terminal, an IoT terminal, etc. The terminal device may be a user equipment (UE) of the third generation partnership project (3GPP) standard, a terminal, a fixed device, a mobile station device or a mobile device, a subscriber unit, a handheld device, a vehicle-mounted device, a wearable device, a cellular phone, a smart phone, a SIP phone, a wireless data card, a personal digital assistant (PDA), a computer, a tablet computer, a notebook computer, a wireless modem, a handheld device, a laptop computer, a computer with wireless transceiver function, a smart book, a vehicle, a satellite, a global positioning system (GPS) device, a target tracking device, an aircraft (such as a drone, a helicopter, or an airplane), a ship, a remote control device, a smart home device, an industrial device, or a device built into the above-mentioned device (such as a communication module, a modem or a chip in the above-mentioned device), or other processing devices connected to a wireless modem. For the sake of convenience of description, the terminal device will be described below by taking the terminal or UE as an example.

[0165] It should be understood that in some scenarios, a UE can also be used to act as a base station. For example, a UE can act as a scheduling entity that provides sidelink signals between UEs in scenarios such as V2X, D2D, or P2P.

[0166] In the embodiments of the present application, the device for implementing the function of the terminal device, i.e., the terminal device, can be the terminal device, or a device capable of supporting the terminal device to implement the function, such as a chip system or chip, which can be installed in the terminal device. In the embodiments of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices.

[0167] The network device in the embodiments of the present application may be a device for communicating with a terminal device, and may also be referred to as an access network device or a radio access network device. For example, the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects a terminal device to a wireless network. Base station can broadly cover various names as follows, or replace the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmission point (TRP), transmission point, master station, auxiliary station, multi-standard radio (motor slide retainer, MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. The base station can also refer to a communication module, modem or chip used to be set in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs base station functions in D2D, V2X, and M2M communications, a network-side device in a 6G network, or a device that performs base station functions in future communication systems. The base station can support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific device form used by the network equipment.

[0168] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0169] In some deployments, the network device mentioned in the embodiments of the present application may be a device including a CU, or a DU, or a device including a CU and a DU, or a control plane CU node (central unit control plane (central unit-control plane, CU-CP)) and a user plane CU node (central unit user plane (central unit-user plane, CU-UP)) and a DU node.

[0170] In some deployments, multiple RAN nodes collaborate to assist terminals in achieving wireless access, with different RAN nodes implementing portions of the base station's functionality. For example, a RAN node can be a CU, DU, CU-CP, CU-UP, or radio unit (RU). The CU and DU can be separate or included in the same network element, such as the BBU. The RU can be included in a radio frequency device or radio unit, such as an RRU, AAU, or RRH.

[0171] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, the radio access network may also be an open radio access network (O-RAN) architecture. In the ORAN system, CU may also be called an open CU (open CU, O-CU), DU may also be called an open DU (open DU, O-DU), CU-CP may also be called an open (open CU-CP, O-CU-CP), CU-UP may also be called an open (open CU-UP, O-CU-UP), and RU may also be called an open RU (open RU, O-RU). Any unit of CU (or CU-CP, CU-UP), DU and RU in this application may be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0172] In the embodiments of the present application, the apparatus for implementing the function of the network device can be the network device, or it can be an apparatus capable of supporting the network device to implement the function, such as a chip system or chip, which can be installed in the network device. In the embodiments of the present application, the chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0173] The network equipment and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the scenarios in which the network equipment and terminal devices are located.

[0174] First, a communication system applicable to an embodiment of the present application is briefly introduced with reference to FIG1 as follows.

[0175] Referring to Figure 1, as an example, Figure 1 is a schematic diagram of a wireless communication system applicable to an embodiment of the present application. As shown in Figure 1, the wireless communication system includes a wireless access network 100. The wireless access network 100 can be a next-generation (e.g., 6G or higher) wireless access network, or a traditional (e.g., 5G, 4G, 3G, or 2G) wireless access network. One or more terminal devices (120a-120j, collectively referred to as 120) can be connected to each other or to one or more network devices (110a, 110b, collectively referred to as 110) in the wireless access network 100. Network elements in the wireless communication system are connected through interfaces (e.g., NG, Xn) or air interfaces.

[0176] When a network device communicates with a terminal device, the network device can manage one or more cells, and a cell can include at least one terminal device. A cell can be understood as an area within the wireless signal coverage range of the network device.

[0177] FIG1 is only a schematic diagram. The wireless communication system may further include other devices, such as core network devices, wireless relay devices and / or wireless backhaul devices, which are not shown in FIG1 .

[0178] It should be noted that the technical solutions of the embodiments of the present application can also be applied to a communication system that integrates terrestrial communication and satellite communication, which communication system can also be called a non-terrestrial network (NTN) communication system. In other words, the RAN100 in Figure 1 may include a terrestrial base station, wherein the terrestrial base station may include a TN cell (i.e., the signal of the TN cell can be transmitted and received through the terrestrial base station); and the RAN100 in Figure 1 may also include a non-terrestrial base station. Taking the non-terrestrial base station as a satellite as an example, the satellite may include an NTN cell (i.e., the signal of the NTN cell can be transmitted and received through the satellite). The terrestrial communication system may be, for example, a long term evolution (LTE) system, a universal mobile telecommunication system (UMTS), a 5G communication system or a new radio (NR) system, or a communication system that is the next step in the development of the 5G communication system, etc., which is not limited here.

[0179] Compared to traditional mobile communication systems, satellite communications offer advantages such as wider coverage, communication costs unrelated to transmission distance, and the ability to overcome natural geographical obstacles such as oceans, deserts, and mountains. To overcome the shortcomings of traditional communication networks, satellite communications can serve as an effective supplement to traditional networks. It is generally believed that non-terrestrial network communications have different channel characteristics than terrestrial network communications, such as longer transmission delays and greater Doppler frequency deviations. For example, the round-trip delay for GEO satellite communications is 238 to 270 milliseconds (ms). The round-trip delay for LEO satellite communications is 8 to 20 ms. Satellite communication systems can be categorized into three types based on their orbital altitude: high Earth orbit (GEO) satellite communication systems, also known as synchronous orbit satellite systems; medium Earth orbit (MEO) satellite communication systems; and low Earth orbit (LEO) satellite communication systems.

[0180] GEO satellites, also known as geostationary orbit satellites, orbit at an altitude of 35,786 kilometers (km). Their primary advantages are stationary relative to the Earth and wide coverage. However, GEO satellites also have significant disadvantages: their distance from Earth requires larger antennas; their transmission latency is relatively high, around 0.5 seconds, making them inadequate for real-time services; and their orbital resources are relatively limited, resulting in high launch costs and a lack of coverage in polar regions. MEO satellites, orbiting at altitudes between 2,000 and 35,786 km, can achieve global coverage with a relatively small number of satellites. However, their transmission latency is higher than that of LEO satellites, and they are primarily used for positioning and navigation. Furthermore, satellites orbiting at altitudes between 300 and 2,000 km are called low-Earth Orbit (LEO). LEO satellites are lower than MEO and GEO satellites, resulting in lower data transmission latency, less power consumption, and relatively lower launch costs. Consequently, LEO satellite communication networks have made significant progress in recent years and garnered significant attention.

[0181] In a possible implementation, satellite equipment can be divided into a transparent mode and a regenerative mode according to its working mode.

[0182] In one implementation of transparent transmission mode, as shown in Figure 2A, satellites and gateways (i.e., the NTN Gateway in Figure 2A) act as relays, namely, the Remote Radio Unit (RRU) in Figure 2A. This relay process is required for communication between the terminal device and the gNB. In other words, in transparent transmission mode, the satellite performs relay forwarding.

[0183] In one implementation of regenerative mode, as shown in Figure 2B, the satellite in this mode can also be understood as a regenerative satellite without an intersatellite link (ISL). The satellite and gateway (i.e., the NTN Gateway in Figure 2B) function as gNBs, enabling communication with end devices. In other words, in regenerative mode, the satellite performs base station functions or partial base station functions, and can be considered a base station. It also has base station processing capabilities, such as regenerative satellites without ISLs and gNB-processed payloads.

[0184] In another implementation of regenerative mode, as shown in Figure 2C, the satellite can also be understood as a regenerative satellite with an intersatellite link (ISL). The satellite has base station functionality or partial base station functionality, and in this case, the satellite can be considered a base station. This is a regenerative satellite with ISL and gNB processed payload, among other base station processing capabilities. The difference between Figure 2C and Figure 2B is that the scenario in Figure 2C includes an ISL.

[0185] In another implementation of regenerative mode, as shown in Figure 2D, the satellite can also be understood as a regenerative satellite with base station DU processing capabilities (NG-RAN with a regenerative satellite based on gNB-DU). The satellite has base station processing capabilities, such as ISL and gNB processed payload. Figure 2D differs from Figures 2B and 2C in that the satellite in this scenario functions as a DU.

[0186] Furthermore, network devices in terrestrial network communication systems and satellites in NTN communication systems can be collectively considered network devices. A device used to implement the functions of a network device can be a network device; alternatively, it can be a device capable of supporting the network device in implementing such functions, such as a chip system, which can be installed in the network device. The aforementioned satellites can be geostationary satellites, non-geostationary satellites, artificial satellites, low-orbit satellites, medium-orbit satellites, high-orbit satellites, and the present application does not specifically limit these.

[0187] In the embodiments of the present application, the device for realizing the function of the terminal device may be a terminal device; or it may be a device capable of supporting the terminal device to realize the function, such as a chip system, which may be installed in the terminal device. In the embodiments of the present application, the chip system may be composed of a chip, or may include a chip and other discrete devices. In the technical solutions provided in the embodiments of the present application, the technical solutions provided in the embodiments of the present application are described by taking the case where the device for realizing the function of the terminal device is a terminal or UE as an example.

[0188] The above content introduces various scenarios of wireless communication involved in this application. It should be understood that the above content is only an exemplary description of the scenarios to which this application can be applied, and this application can also be applied to other application scenarios. For example, the scenario of satellite as integrated access backhaul (IAB), terminal-to-terminal communication scenario, terminal-to-road side unit (RSU) communication scenario, terminal-to-control node communication scenario, RSU-to-base station communication scenario, control node-to-base station communication scenario, etc. are not limited here. The wireless communication process involved in this application will be introduced below.

[0189] Next, some of the terms used in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

[0190] 1. Configuration and pre-configuration

[0191] In this application, configuration and pre-configuration are used simultaneously. Configuration refers to the network device / server sending some parameter configuration information or parameter values ​​to the terminal through messages or signaling, so that the terminal can determine the communication parameters or resources during transmission based on these values ​​or information. Pre-configuration is similar to configuration and can be parameter information or parameter values ​​pre-negotiated between the network device / server and the terminal device, parameter information or parameter values ​​used by the base station / network device or terminal device as specified in the standard protocol, or parameter information or parameter values ​​pre-stored in the base station / server or terminal device. This application does not limit this.

[0192] Furthermore, these values ​​and parameters can be changed or updated.

[0193] 2. In this application, "used for indication" can include direct indication and indirect indication. When describing that a certain indication information is used to indicate A, it can be understood that the indication information carries A, directly indicates A, or indirectly indicates A.

[0194] In this application, the information indicated by the indication information is referred to as the information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated. For example, it can be implemented by direct indication, such as by indicating the information to be indicated itself or the index of the information to be indicated. It can also be implemented by indirectly indicating other information, wherein there is an association between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while the other parts of the information to be indicated are known or agreed in advance. For example, the indication of specific information can also be achieved with the help of the arrangement order of each information agreed in advance (for example, stipulated in the protocol), thereby reducing the indication overhead to a certain extent.

[0195] The information to be indicated can be sent as a whole, or divided into multiple sub-information and sent separately, and the sending period and / or sending time of these sub-information can be the same or different. The specific sending method is not limited in this application. Among them, the sending period and / or sending time of these sub-information can be pre-defined, for example, pre-defined according to the protocol, or configured by the transmitting device by sending configuration information to the receiving device. Among them, the configuration information can, for example, but not limited to, include one or a combination of at least two of RRC signaling, medium access control (MAC) layer signaling and physical layer signaling. Among them, MAC layer signaling, for example, includes MAC CE; physical layer signaling, for example, includes downlink control information (DCI).

[0196] 3. The "sending" and "receiving" in the embodiments of the present application indicate the direction of signal transmission. In the present application, when entity A sends information to entity B, it can be that A sends it directly to B, or that A sends it indirectly to B through other entities. Similarly, when entity B receives information from entity A, it can be that entity B directly receives the information sent by entity A, or that entity B indirectly receives the information sent by entity A through other entities. The entities A and B here can be RAN nodes or terminals, or modules inside the RAN nodes or terminals. The sending and receiving of information can be the information interaction between a RAN node and a terminal, for example, the information interaction between a base station and a terminal; the sending and receiving of information can also be the information interaction between two RAN nodes, for example, the information interaction between a CU and a DU; the sending and receiving of information can also be the information interaction between different modules inside a device, for example, the information interaction between a terminal chip and other modules of the terminal, or the information interaction between a base station chip and other modules in the base station. "Sending" can also be understood as the "output" of the chip interface, for example, the baseband chip outputs information to the RF chip, and "receiving" can also be understood as the "input" of the chip interface; for example, "sending" can also be understood as the baseband part inside the device outputting information to the RF part, and "receiving" can also be understood as the RF part inside the device receiving the information output by the baseband part.

[0197] 4. The terms "system" and "network" in the embodiments of the present application can be used interchangeably. "At least one" means one or more, and "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, "at least one of A, B and C" includes A, B, C, AB, AC, BC or ABC. And, unless otherwise specified, the ordinal numbers such as "first" and "second" mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, timing, priority or importance of multiple objects.

[0198] 5. In this application, the terms "first" and "second" are used for convenience of description only and are not intended to limit the scope of the embodiments of this application. They are not intended to describe the order or precedence of features. It should be understood that such terms can be interchanged where appropriate to describe solutions other than the embodiments of this application.

[0199] 6. Signal

[0200] A signal is a symbol, data, or message transmitted via a medium (e.g., electromagnetic waves, light waves, sound waves, etc.) that can be decoded and understood by the receiving end. Signals can be analog or digital.

[0201] As an example, the signal is a reference signal (RS). A reference signal may also be called a pilot signal or a pilot, which is a known signal. For example, a reference signal may be a signal provided by a transmitting end to a receiving end for channel estimation, channel sounding or data demodulation. Reference signals include uplink reference signals and downlink reference signals. Examples of uplink reference signals include: a demodulation reference signal (DMRS) and a sounding reference signal (SRS). DMRS may include, for example, a DMRS for demodulation of a physical uplink control channel (PUCCH) (which may be referred to as DMRS for PUCCH) and a DMRS for demodulation of a physical uplink share channel (PUSCH) (which may be referred to as DMRS for PUCCH). Examples of downlink reference signals include: a channel state information-reference signal (CSI-RS), a cell-specific reference signal (C-RS / CRS), a DMRS, and a positioning reference signal (P-RS / PRS).

[0202] There are multiple reference signals. As the standard continues to evolve, the names of the reference signals may change, and more reference signals may appear. There is no specific limitation on this.

[0203] A signal can be data or a message. Data can be a data packet to be sent, modulated data, a frequency domain signal or a time domain signal generated by mapping data to time-frequency resources. A signal can also be control information, such as physical layer control information or upper layer control information.

[0204] The first signal involved in each embodiment of the present application can be a signal carried by each time domain unit in a symbol group, or can be a signal carried by each time domain unit in a symbol group used to generate a first sequence, etc., without limitation. The first signal can be a single signal or a group of signals, without specific limitation. The second signal can refer to a time domain signal, or it can be understood that the second signal is a time domain description.

[0205] 6. Number of transmissions;

[0206] Transmission times: refers to the number of times the same signal (such as a reference signal) is sent, that is, the number of times it is repeatedly sent. Optionally, the transmission times can be in the time domain, in the frequency domain, or in the spatial domain or code domain, and this application does not impose any restrictions on this.

[0207] 7. Time-frequency resources

[0208] Data or information can be carried through time-frequency resources.

[0209] In the time domain, the time-frequency resources may include one or more time domain units (or, may also be referred to as time units). A time domain unit may be a symbol, or an orthogonal frequency division multiplexing (OFDM) symbol, or a mini-slot, or a slot, or a partial slot, or a subframe, or a radio frame, etc. Among them, a slot may be composed of 6, 7, 12 or 14 symbols; a mini-slot may include at least one symbol (for example, 2 symbols or 7 symbols or 14 symbols, or any number of symbols less than or equal to 14 symbols); the duration of a subframe in the time domain may be 1 millisecond (ms). It should be understood that the above-mentioned time domain unit sizes listed are only for the convenience of understanding the solution of the present application and do not constitute a limitation on the scope of protection of the present application. It is understandable that the above-mentioned time domain unit sizes may be other values, which are not limited by the present application.

[0210] In the frequency domain, time-frequency resources can include one or more frequency domain units. A frequency domain unit can be a resource block (RB), a subcarrier, a resource block group (RBG), a predefined subband, a precoding resource block group (PRG), a bandwidth part (BWP), a resource element (RE) (also called a resource unit or resource particle), a carrier, or a serving cell.

[0211] 8. Spreading

[0212] Extension, also known as spreading, spread spectrum processing, or spread spectrum, refers to a method in which a specific sequence (for ease of description, this sequence is referred to as sequence #A) is used in the time and / or frequency domain to directly multiply one or a group of identical signals and spread them across more resources for transmission. This specific sequence is called an extension sequence, spreading sequence, or orthogonal cover codes (OCC). A spreading sequence may include one or more elements (also known as symbols). The length of the extension sequence is referred to as the extension length, extension factor, spreading factor, spreading length, or orthogonal code length (OCC-length).

[0213] Alternatively, expansion can also be called spread or spreading.

[0214] For example, the signal to be transmitted is d, where d can be the signal to be transmitted (which can be a signal, a group of signals, one or more symbols, one or more time slots, etc.), and the signal is extended using the extended sequence #A. The extended signal b can be expressed as follows: i =w i d, i=0,…,N SF -1 (1)

[0215] in, N S Indicates the extension length. For ease of description, wi is referred to as an element of sequence #A below. That is, a sequence #A of length NSF includes NSF elements. Element can also be replaced by other names, such as codeword.

[0216] In one possible design, the extended sequence (e.g., sequence #A) is a binary sequence. For example, if the extended sequence length is 2, the extended sequence can be any of the following: [+1 +1], [+1 -1]. For another example, if the extended sequence length is 4, the extended sequence can be any of the following: [+1 +1 +1 +1], [+1 +1 -1 -1], [+1 -1 +1 -1], [+1 -1 -1 +1]. For another example, assuming that the length of the extended sequence is 8, the extended sequence can be any of the following: [+1 +1 +1 +1 +1 +1 +1 +1], [+1 -1 +1 -1 +1 -1 +1 -1], [+1 +1 -1 -1 +1 +1 -1 -1], [+1 -1 -1 +1 +1 -1 -1 +1], [+1 +1 +1 -1 -1 -1 +1 -1], [+1 -1 +1 -1 -1 +1 -1 +1], [+1 +1 -1 -1 -1 -1 +1 +1], or [+1 -1 -1 +1 -1 +1 +1 -1].

[0217] In another possible design, the extended sequence is a complex sequence. For example, if the extended sequence length is 2, the extended sequence can be any of the following: [+1 +j], [+1 -j]. For another example, if the extended sequence length is 4, the extended sequence can be any of the following: [+1 +1 +1 +1], [+1 -j +1 +j], [+1 -1 +1 -1], [+1 +j -1 -j]. For another example, assuming that the length of the extended sequence is 8, the extended sequence can be any of the following: [+1 +1 +1 +1 +1 +1 +1 +1], [+1 -1 +1 -1 +1 -1 +1 -1 +1 -1], [+1 +1 -j -j -1 -1 +j +j], [+1 -1 -j +j -1 +1 +j -j], [+1 +1 -1 -1 +1 +1 -1 -1], [+1 -1 -1 +1 +1 -1 -1 +1], [+1 +1 +j +j -1 -1 -j -j], or [+1 -1 +j -j -1 +1 -j +j].

[0218] Alternatively, rows or columns in a DFT or IDFT matrix may be used as the spreading sequence.

[0219] Alternatively, for example, for a length of N SF The extended sequence has a total of at most N SF An extended sequence described as follows:

[0220] or,

[0221] where w n (k) represents the kth element in the kth sequence.

[0222] The time domain extension is further described below by taking the extension of OFDM symbols as an example. As an example, the signal of the time domain symbol at symbol n satisfies the following formula (2).

[0223] Where m = 0, 1, ..., N S R-1, l = 0, 1, ..., N SF -1.

[0224] Among them, s n (t) represents the signal of the time domain symbol at symbol n, w n (m) represents the mth element in the extended sequence numbered n, N S represents the length of the extended sequence, R represents the number of resources corresponding to an element in the extended length, represents the number of symbols corresponding to an element in formula (2), t represents time, Indicates that x is rounded down.

[0225] Optional, s n (t) is a time domain signal obtained after a signal (such as data and / or reference signal) is mapped to each subcarrier on symbol 1 and then undergoes inverse fast Fourier transform (IFFT).

[0226] Optionally, in the above formula (2), when R=1, the spreading (or time domain spreading) may be referred to as direct spreading.

[0227] Optionally, in the above formula (2), when R>1, the expansion (or time domain expansion) can be called block-wise spreading.

[0228] Optionally, in the above formula (2), when s n When (t) is replaced by the frequency domain signal d(k), it can also be described in a frequency domain extension manner. As an example, the frequency domain signal d(k) satisfies formula (3).

[0229] Wherein, R represents the number of resources corresponding to one element in the extended length, and in formula (3), R represents the number of frequency domain resources corresponding to one element.

[0230] The extended sequence may also be called a time domain extended sequence, a frequency domain extended sequence, or a time-frequency extended sequence, etc. The embodiments of the present application do not limit the name.

[0231] Extension processing can be divided into different extension types (or extension methods). The basis for the classification of extension types includes the resource type of the extension processing. Under this classification basis, extension types include time domain extension, frequency domain extension, and time-frequency extension.

[0232] Time domain expansion refers to the expansion of a signal in the time domain (e.g., first-type time domain units). The first-type time domain units used to carry signals can be distributed continuously or discontinuously, without limitation. For example, the first-type time domain units used to carry signals can be continuous symbols or time slots, or discontinuous symbols or time slots (e.g., symbols separated by a certain length).

[0233] Frequency domain expansion refers to the expansion processing of the signal in the frequency domain (such as the first type of frequency domain unit). The first type of frequency domain unit used to carry the signal can be continuously distributed or in the form of combing, which is not limited. Combing means that the first type of frequency domain unit used to carry the signal is discontinuously distributed. Optionally, under combing, the frequency domain unit used to carry the signal can be in every N comb The frequency domain interval N is performed by using one unit in each unit. comb The value of may be referred to as the comb size. Optionally, different devices on the same symbol may implement multiplexing by occupying different frequency domain offset values ​​(comb offset).

[0234] Time-frequency expansion refers to the expansion processing of signals in both the time domain and the frequency domain.

[0235] There is no limitation on the specific form of sequence #A.

[0236] It can be understood that sequence #A can also be called a first sequence, an extended sequence, or a time domain extended sequence, and its naming does not limit the protection scope of the embodiments of the present application.

[0237] The above briefly explains the terms involved in this application, which will not be repeated in the following embodiments. In addition, the above explanation of the terms is only for the purpose of facilitating understanding and does not limit the scope of protection of the embodiments of this application.

[0238] In communication systems, for example, where base stations are deployed on satellites and terminals are located on the ground, the limited transmit power of the terminals may result in poor communication link quality between the terminals and the base station. Therefore, uplink coverage enhancement technology based on repetition is introduced to compensate for the insufficient uplink transmission power of the terminals. For example, Figure 3 shows a single-frequency signal transmitted over a narrowband physical random access channel (NPRACH). The NPRACH channel achieves coverage enhancement by repeatedly transmitting signals.

[0239] In order for multiple devices to multiplex the NPRACH channel, OCC is introduced on the NPRACH channel. The original intention was to achieve orthogonality of NPRACH through OCC, thereby reducing mutual interference when multiple devices multiplex the NPRACH channel. However, under normal circumstances, there is a delay difference (also called timing deviation) between multiple devices, which results in the single-frequency signal orthogonality achieved by OCC not being complete. That is, even if multiple devices multiplex NPRACH through OCC, there will be interference. For example, taking a symbol group consisting of 5 symbols as an example, Figure 4 is an example of the delay difference between terminal #1 and terminal #2, where s is the transmitted signal and W1 to W5 are different elements corresponding to OCC.

[0240] In order to solve the above technical problems, this application provides several ideas, which are introduced below:

[0241] The first idea is to add a second CP before at least one symbol in the symbol group and limit the relationship between the second CP before some symbols in the symbol group and the first CP before the first symbol. This can reduce the inter-symbol interference between symbol groups corresponding to different devices, thereby improving the orthogonal effect.

[0242] The second approach involves converting the original N time-domain symbols into a second signal with a subcarrier spacing 1 / Nth that of the original time-domain symbols, resulting in a duration N times longer. This shortens the time-domain edge length and narrows the frequency domain. This approach allows devices to select more frequency domain locations during signal orthogonality, even when there is time-domain overlap, thereby improving orthogonality.

[0243] It should also be understood that in some embodiments, the devices in the existing network architecture are mainly used as examples for illustrative description (such as network devices, terminal devices, etc.), and it should be understood that the embodiments of the present application are not limited to the specific form of the devices. For example, devices that can achieve the same functions in the future are applicable to the embodiments of the present application.

[0244] It is understandable that in each method embodiment, the methods and operations implemented by a device (such as a network device, a terminal device) may also be implemented by components of the device (such as a chip or a circuit).

[0245] In this application, "sending information" can be understood as one device sending information to another device, or as one logic module within a device sending information to another logic module. For example, "a network device sending information" can be understood as the network device sending information to another device (such as a terminal), or as logic module 1 within the network device sending information to logic module 2 within the network device.

[0246] In this application, "receiving information" can be understood as one device receiving information from another device, or it can also be understood as a logic module within a device receiving information from another logic module. For example, "a network device receiving information" can be understood as the network device receiving information from another device (such as a terminal), or it can be understood as logic module 1 in the network device receiving information from logic module 2 in the network device.

[0247] In addition, in this application, "sending information to... (access network device)" can be understood as the destination end of the information being the access network device. This can include sending information directly or indirectly to the access network device. "Receiving information from... (access network device)" can be understood as the source end of the information being the access network device, which can include receiving information directly or indirectly from the access network device. The information may undergo necessary processing between the source end and the destination end of the information transmission, such as format changes, etc., but the destination end can understand the valid information from the source end. Similar expressions in this application can be understood similarly and will not be repeated here.

[0248] In this application, "communication" can also be described as "data transmission", "information transmission", "data processing", etc. "Transmission" includes "sending" and "receiving", among which "transmission" can also be described as "output", which will not be repeated below.

[0249] In each embodiment, “optionally, the method further includes…” can be understood as these steps may be executed in full, none, or only part of them, which is not limited in this application.

[0250] In the embodiments of this application, words such as "exemplary" and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of the word "exemplary" is intended to present concepts in a concrete way.

[0251] It should be understood that references to "embodiments" throughout this specification mean that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present application. Therefore, various embodiments throughout this specification do not necessarily refer to the same embodiment. Furthermore, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0252] It should be understood that in the various embodiments of the present application, the size of the sequence number of each process does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. The names of all nodes and messages in this application are merely names set by this application for the convenience of description. The names in the actual network may be different. It should not be understood that this application limits the names of various nodes and messages. On the contrary, any name with the same or similar function as the node or message used in this application is regarded as the method or equivalent replacement of this application, and is within the scope of protection of this application.

[0253] It should also be understood that in this application, "when...", "if...", "in the case of..." and "if" all mean that the network element will make corresponding processing under certain objective circumstances. It does not limit the time, nor does it require that the device must have a judgment action when it is implemented, nor does it mean that there are other limitations. In addition, in this application, the description of conditions such as "when...", "if...", "in the case of..." and "if" can be understood as necessary conditions, and there is no limitation on whether the condition is a sufficient condition or whether it is a necessary and sufficient condition. For example, "in the case of A, execute B" can be understood as "if at least A is met, execute B."

[0254] In addition, in each embodiment of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0255] The terms "system" and "network" in the embodiments of the present application can be used interchangeably. "At least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, "at least one of A, B or C" includes A, B, C, AB, AC, BC or ABC, and "at least one of A, B and C" can also be understood to include A, B, C, AB, AC, BC or ABC. And, unless otherwise specified, the ordinal numbers such as "first" and "second" mentioned in the embodiments of the present application are used to distinguish multiple objects and are not used to limit the order, timing, priority or importance of multiple objects.

[0256] It should be noted that in this application, when comparing A and B, the description of "when A is greater than or equal to B, execute method A, when A is less than or equal to B, execute method B" can be specifically implemented as "when A is greater than or equal to B, execute method A; or, when A is less than B, execute method B", or "when A is greater than B, execute method A; or, when A is less than or equal to B, execute method B". This application does not limit this.

[0257] The communication method and apparatus provided by the present application are further described below in conjunction with the accompanying drawings. It is understandable that the present application uses the first device and the second device as examples of the execution subjects of the interactive diagram, but the present application does not limit the execution subjects of the interactive diagram. In the present application, the first device or the second device can be a network device, or a module in a network device (such as a circuit, a chip or a chip system, etc.), or a logical node, a logical module or software that can implement all or part of the network function. Alternatively, the first device or the second device can be a terminal device, or a communication module in a terminal device or a circuit or chip in a terminal responsible for the communication function (such as a modem chip (also known as a baseband chip), or a SoC chip containing a modem core, or a SIP chip).

[0258] Please refer to FIG5 , which is a flow chart of a communication method provided in an embodiment of the present application. The method may include steps 501 to 503 .

[0259] Step 501: The first device determines a symbol group.

[0260] In the embodiments of the present application, the first device may be a terminal device or a network device, and the second device may be a terminal device or a network device. For example, in a scenario involving transmission between terminals, the first device and the second device are terminal devices. In an uplink transmission scenario, the first device is a terminal device, and the second device is a network device. In a downlink transmission scenario, the first device is a network device, and the second device is a terminal device.

[0261] It should be noted that in the case of an uplink transmission scenario or a downlink transmission scenario (including the embodiment shown in FIG5 and subsequent embodiments), the transmission may be between some components in the network device (such as a processor, chip, or chip system, etc.) and some components in the terminal device (such as a processor, chip, or chip system, etc.). Furthermore, "sending" can also be understood as the "output" of the chip interface, such as the baseband chip outputting information to the RF chip, and "receiving" can also be understood as the "input" of the chip interface; for example, "sending" can also be understood as the baseband part inside the device outputting information to the RF part, and "receiving" can also be understood as the RF part inside the device receiving the information output by the baseband part.

[0262] The first device determines a symbol group, where the symbol group includes a first CP and N time-domain symbols, where the N time-domain symbols include M time-domain symbols, and each of the M time-domain symbols is preceded by a second CP. A duration of the first CP is related to a first difference, where the first difference is a difference between a preset duration and a total duration of the M second CPs. N is a positive integer greater than 1, and M is a positive integer greater than 0 and less than or equal to N.

[0263] A symbol group can carry signals or data. A time-domain symbol can also be called a symbol, orthogonal frequency division multiplexing (OFDM) symbol. The CP duration can also be understood as the length of the CP in the time domain. This means the CP duration can also be described as the CP length.

[0264] Optionally, the first CP is located before the first time domain symbol among the N time domain symbols. The second CP is located before each time domain symbol among the M time domain symbols.

[0265] Furthermore, the content included in the first CP may be the tail content of the first time domain symbol among the N time domain symbols, or the tail content of the last time domain symbol among the N time domain symbols, or the tail content of a time domain symbol at any other position among the N time domain symbols, and the specific details are not limited here. The content of the M second CPs may be the tail content of the corresponding time domain symbols among the M time domain symbols.

[0266] For example, the first CP is the CP of the first time domain symbol among the N time domain symbols. For another example, the first CP is the CP of the last time domain symbol among the N time domain symbols. For another example, the content of the second CP of the second time domain symbol is taken from the tail content of the second time domain symbol.

[0267] It should be noted that, if M=N, the CP of the first time domain symbol among the N time domain symbols includes not only the first CP but also the second CP.

[0268] In addition, the duration of the second CP is predefined or configured by signaling, and the second CPs corresponding to different symbols may be the same or different. The duration of each time domain symbol in the N time domain symbols may be the same or different. When the duration of each time domain symbol is the same, the duration of the first CP may also be the same as or different from the duration of each time domain symbol. This will be described in detail with reference to several examples later, and the details will not be expanded here. The value of the preset duration can be set according to actual needs. For example, the preset duration can be at least one of the following: 2048T s 、8192T s 、24576T s , 66.7 microseconds, 266.7 microseconds, 800 microseconds. Among them, T s It is the basic time unit.

[0269] In addition, the above T s It can be set according to actual needs, for example, T s The value of T is 1 / 30270 milliseconds. s The duration of each time domain sampling point under the SCS corresponding to 20 MHz bandwidth 15 kHz.

[0270] There are many possibilities for the duration of the first CP to be related to the first difference. For example, the duration of the first CP is equal to the first difference. For another example, the duration of the first CP is less than or equal to the first difference. For another example, the difference between the duration of the first CP and the first difference is less than or equal to a first preset threshold. For another example, the difference between the duration of the first CP and the first difference is greater than or equal to a second preset threshold, etc., and the specific details are not limited here.

[0271] The duration of the CP (i.e., the first and second CPs) is described above. The following describes the contents of the CP. Generally, for a symbol, the sampling points at the end of the symbol can be copied to the front of the symbol as the CP. This ensures that the number of waveform periods of the symbol is an integer in the fast Fourier transform (FFT) period, thereby ensuring the orthogonality of the subcarriers. Specifically, it can also be understood as copying the end of the payload (i.e., the signal content carried by the symbol) and transmitting it as the CP, which ensures that there is "circular" convolution between the transmitted signal and the channel response.

[0272] In addition, the signal carried in the symbol group may include at least one of the following: a random access signal, a downlink synchronization signal, a channel sounding reference signal (SRS), a channel state reference signal (CSI-RS), a time domain symbol corresponding to a control channel, or a time domain symbol corresponding to a data channel, etc., which is not limited here.

[0273] The time domain symbol corresponding to the control channel can be understood as the time domain signal that the control channel becomes after time domain mapping (or frequency domain mapping and time domain mapping). Similarly, the time domain symbol corresponding to the data channel can be understood as the time domain signal that the data channel becomes after time domain mapping (or frequency domain mapping and time domain mapping).

[0274] Exemplarily, taking a symbol group carrying a random access signal as an example, there are multiple situations for the number of the N time domain symbols, the duration of each time domain symbol, and the duration of the first CP.

[0275] Example 1: The random access signal uses format 0, N=5, and the duration of each time domain symbol is 8192T. s , the default duration is 2048T s , T s The symbol group in Example 1 may be as shown in FIG6A . For example, the preset duration is 66.7 microseconds, and the duration of each time domain symbol is 266.7 microseconds.

[0276] Example 2: The random access signal uses format 1, N=5, and the duration of each time domain symbol is 8192T. s , the preset duration is 8192T s , T s The symbol group in Example 2 may be as shown in FIG6B . For example, the preset duration and the duration of each time domain symbol are 266.7 microseconds.

[0277] Example 3: The random access signal uses format 2, N=3, and the duration of each time domain symbol is 24576T. s , the preset duration is 24576T s , T s The symbol group in Example 3 may be as shown in FIG6C . For example, the preset duration and the duration of each time domain symbol are 800 microseconds.

[0278] It should be noted that the second CP is not shown in the above FIG. 6A to FIG. 6C . The second CP will be described in conjunction with the value of M later and will not be expanded here.

[0279] It is understandable that the above three examples are just examples, and in actual applications, the symbol group may also have other forms, which are not specifically limited here.

[0280] In this application, there are multiple situations for the relationship between M and N, which are described below respectively.

[0281] First, the M time domain symbols include the 2nd time domain symbol to the Nth time domain symbol in the N time domain symbols, and M=N-1.

[0282] For example, FIG7A illustrates a symbol group example when N=5, and FIG7B illustrates a symbol group example when N=3. The symbol group shown in FIG7A can be applied to scenarios where the random access signal uses format 0 or format 1. The symbol group shown in FIG7B can be applied to scenarios where the random access signal uses format 2.

[0283] This situation can also be understood as not adding the second CP to the first time domain symbol, but adding the second CP to the second time domain symbol to the Nth time domain symbol.

[0284] Furthermore, the duration of the first CP is equal to the first difference. CP =T1-(N-1)·T CP0 , can also be understood as, T CP0 Borrow a portion of the time from T1. Theoretically, the less time T1 is borrowed, the stronger the coverage of the signal carried by the symbol group. CP Indicates the duration of the first CP, T1 indicates the preset duration, T CP0 Indicates the duration of the second CP. For example, in the example where the symbol group carries a random access signal, N can also be understood as the number of repeated NPRACH symbols in the NPRACH format.

[0285] In this case, the signal of the first CP and the first time domain symbol among the N time domain symbols satisfies the following conditions:

[0286] Condition 1:

[0287] Among them, s i (t) represents the signal of the first CP and the first time domain symbol, i is used to identify the symbol group, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the symbol group, T CP Indicates the duration of the first CP, T CP0 Indicates the duration of the second CP, and T1 indicates the preset duration.

[0288] For example, in the case where the signal is a random access preamble, This explains the difference in subcarrier spacing between random access preamble and uplink data transmission. RA Indicates the subcarrier spacing of the random access preamble, Indicates the number of subcarriers for uplink data.

[0289] The signals of M time domain symbols out of N time domain symbols satisfy the following conditions:

[0290] Condition 2:

[0291] Among them, s i (t) represents the signal of M time domain symbols, i is used to identify the symbol group, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the symbol group, T CP Indicates the duration of the first CP, T CP0 Indicates the duration of the second CP, and T1 indicates the preset duration.

[0292] The second type is that M time domain symbols are N time domain symbols, M=N.

[0293] This situation can also be understood as adding the second CP to the 1st time domain symbol to the Nth time domain symbol respectively.

[0294] For example, FIG8A illustrates a symbol group example when N=5, and FIG8B illustrates a symbol group example when N=3. The symbol group shown in FIG8A can be applied to scenarios where the random access signal uses format 0 or format 1. The symbol group shown in FIG8B can be applied to scenarios where the random access signal uses format 2.

[0295] Furthermore, the duration of the first CP is equal to the first difference. CP =T1-N·T CP0 , where T CP Indicates the duration of the first CP, T1 indicates the preset duration, T CP0 Indicates the duration of the second CP. For example, in the example where the symbol group carries a random access signal, N can also be understood as the number of repeated NPRACH symbols in the NPRACH format.

[0296] In this case, the signal of the first CP meets the following conditions:

[0297] Condition 3:

[0298] Among them, s i (t) represents the signal of the first CP, i is used to identify the symbol group, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the symbol group, TCP Indicates the duration of the first CP, T CP0 Indicates the duration of the second CP.

[0299] The signal of N time domain symbols meets the following conditions:

[0300] Condition 4:

[0301] Among them, s i (t) represents a signal of N time domain symbols, i is used to identify the symbol group, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the symbol group, T CP Indicates the duration of the first CP, T CP0 Indicates the duration of the second CP, and T1 indicates the preset duration.

[0302] It is understandable that the above two situations and the expressions that meet the conditions are just examples. In actual applications, the relationship between N and M and the expressions corresponding to each condition may have other possibilities (which will be described in conjunction with OCC later and will not be expanded here), and no specific limitations are made here.

[0303] Furthermore, the signal of the aforementioned symbol group may be processed in combination with the first sequence and then transmitted. For example, R symbols in the symbol group are generated based on the first sequence and the first signal, where R is a positive integer not greater than N, and the first signal is a reference signal or a time domain signal of a data channel. The R symbols are M time domain symbols, or alternatively, the R symbols are N time domain symbols.

[0304] The first sequence may be a row or a column taken from a sequence set. The sequence set may be, for example, at least one of the following: a DFT sequence, a Hadamard code matrix, a ZC sequence set, etc.

[0305] Optionally, each symbol in the R symbols is multiplied with each element in the first sequence, and each symbol is used to carry a signal obtained by multiplying the corresponding element and the first signal.

[0306] Exemplarily, in the example where the signal carried by the symbol group is combined with the first sequence corresponding to the OCC, the above conditions may also be expressed using other expressions.

[0307] For example, the above condition 1 can be changed to the following condition 5:

[0308] Condition 5:

[0309] For another example, the above condition 2 can be changed to the following condition 6:

[0310] Condition 6:

[0311] For another example, the above condition 3 can be changed to the following condition 7:

[0312] Condition 7:

[0313] For another example, the above condition 4 can be changed to the following condition 8:

[0314] Condition 8:

[0315] Among them, W u (1) represents the first element of the OCC sequence, W u (m) represents the m-th element of the OCC sequence.

[0316] In actual applications, the above conditions may vary depending on the first sequence. The above are just a few examples of the conditions and are not limited to the specific ones here.

[0317] Optionally, the s in each condition of this application i (t) may be a baseband signal.

[0318] Step 502: The first device sends a symbol group to the second device.

[0319] After determining the symbol group, the first device sends the symbol group to the second device. Correspondingly, the second device receives the symbol group sent by the first device.

[0320] Optionally, before step 502, the first device may further obtain configuration information, where the configuration information is used to indicate a resource set of the symbol group, where the resource set includes a set of time domain and / or frequency domain resources, and the resource set is used to send the symbol group.

[0321] Correspondingly, the second device may send configuration information to the first device.

[0322] The resource sets corresponding to different devices may be the same or different. Different devices may refer to devices with different capabilities or devices supporting different protocol versions.

[0323] Furthermore, different devices have different resource sets. For example, different resource sets may include any of the following: different time domain resources, different frequency domain resources, or different time-frequency resources.

[0324] In addition, the number of symbol groups may be one or more. If the number of symbol groups is multiple, the first device may transmit the multiple symbol groups in a frequency hopping manner.

[0325] Step 503: The second device performs processing according to the symbol group.

[0326] After receiving the symbol group sent by the first device, the second device may perform processing based on the symbol group, wherein the processing includes: channel estimation, signal detection, data demodulation, etc.

[0327] Optionally, the second device detects the first signal after the first CP in the symbol group.

[0328] It should be noted that the present application may also involve the situation where multiple devices send symbol groups, and the symbol groups corresponding to different devices may be the same or different, which is not specifically limited here.

[0329] In order to compare the beneficial effects achieved by this application over those of the prior art, the following experiments were conducted:

[0330] Test 1: Random access signal format 0, T 预设 =66.7μs, T CP0 =97T s =3.16μs, the coverage radius of the signal changes from the original 10 kilometers to 8 kilometers, which hardly affects the coverage.

[0331] Test 2: Random access signal format 1, T 预设 =266.7μs, T CP0 =97T s =3.16μs, the coverage radius of the signal changes from the original 40 kilometers to 38 kilometers, which has almost no impact on the coverage.

[0332] Test 3: Random access signal format 2, T 预设 =800μs, T CP0 =97T s =3.16μs, the coverage radius of the signal changes from the original 120 kilometers to 119 kilometers, which has almost no impact on the coverage.

[0333] The above experimental data shows that by adding a second CP before at least one symbol in a symbol group, the shorter the second CP duration, the less the preset duration is borrowed, and the better the coverage. In addition, the above experiments show that by limiting the relationship between the second CP and the first difference in a symbol group, the inter-symbol interference between symbol groups corresponding to different devices can be reduced without affecting coverage, thereby improving the orthogonality effect.

[0334] The second idea is first introduced below. Please refer to Figure 9, which is a flow chart of a communication method provided in an embodiment of the present application. The method may include steps 901 and 902. Steps 901 and 902 can be performed by a communication device, or by some components in the communication device (such as a processor, chip or chip system, etc.), or by a logic module or software that can realize all or part of the functions of the communication device. The following description is taken as an example of execution by a communication device. In addition to including the terminal device and / or network device in Figures 1 to 2D above, the communication device may also be a user device, a vehicle-mounted device, an on-board unit (OBU), an RSU, a relay node with mobility, a mobile base station, an aerial platform, a satellite, a drone, an airship, an airplane, etc. In addition, the processing performed by a single execution subject in steps 901 and 902 may also be divided into multiple execution subjects, and these execution subjects may be logically and / or physically separated. For example, when the communication device is a network device, such as a base station, the processing performed by the communication device can be divided into at least one of a CU, a DU and a RU.

[0335] Step 901: The first device determines a second signal.

[0336] In the embodiments of the present application, the first device may be a terminal device or a network device, and the second device may be a terminal device or a network device. For example, in a scenario involving transmission between terminals, the first device and the second device are terminal devices. In an uplink transmission scenario, the first device is a terminal device, and the second device is a network device. In a downlink transmission scenario, the first device is a network device, and the second device is a terminal device.

[0337] The first device determines a second signal, where the second signal includes a third cyclic prefix CP of the second symbol and the second symbol, the duration of the second symbol is equal to the sum of the durations of N third symbols, and the subcarrier spacing of the second symbol is 1 / N of the subcarrier spacing of the third symbol, where N is a positive integer greater than or equal to 2.

[0338] The content included in the third CP may be the tail content of the second symbol, and the duration of the third CP may be 128T. s , 256T s , 512T s , 1024T s , 2048T s 、8192T s 、24576T s , 4.2 microseconds, 8.3 microseconds, 16.7 microseconds, 33.3 microseconds, 66.7 microseconds, 266.7 microseconds, 800 microseconds, etc., which are not limited here. s is the basic time unit, the above Ts It can be set according to actual needs, for example, T s The value of T is 1 / 30270 milliseconds. s The duration of each time domain sampling point under 20 MHz bandwidth and 15 kHz SCS.

[0339] It should be noted that the second signal in this embodiment can be understood as a time domain symbol. For example, the second signal can be as shown in FIG10 .

[0340] Optionally, the duration of one third symbol includes any one of the following: 8192T s 、24576T s 、12288T s 、6144T s 、3072T s The duration of the N third symbols includes any of the following: N*8192T s 、N*24576T s 、N*12288T s 、N*6144T s 、N*3072T s The subcarrier spacing of the third symbol includes any one of the following: 1.25 kHz, 3.75 kHz, 2.5 kHz, 5 kHz, 6.5 kHz, 10 kHz, 15 kHz, etc.

[0341] Optionally, the bandwidth of the second symbol is the subcarrier spacing of the third symbol.

[0342] For example, in order to facilitate understanding of the difference between the second symbol and the third symbol, as shown in Figure 11, the upper part of Figure 11 is an example of the third symbol, and the lower part of Figure 11 is an example of the second symbol. It can be seen that N third symbols are changed into one second symbol, and the subcarrier spacing of the second symbol is 1 / N of the third symbol, and the duration becomes N times the original. That is, the time domain becomes longer and the frequency domain becomes narrower. In this way, during the signal orthogonal process, even if there is time domain overlap, the frequency domain positions that the device can select become more, thereby improving the orthogonality effect.

[0343] In this embodiment, the second signal satisfies different conditions according to different situations of the CP.

[0344] First, the third CP length is different from the third symbol length.

[0345] In this case, the second signal meets the following conditions:

[0346] Condition 9:

[0347] Among them, s i(t) represents the second signal, i is used to identify the symbol group where the second symbol is located, m represents a parameter for determining the frequency domain resource position of the first signal, m is an integer, β represents an amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the second symbol, T CP represents the duration of the third CP, and T2 represents the duration of the second symbol.

[0348] Second, the third CP length is the same as the third symbol length.

[0349] In this case, the second signal meets the following conditions:

[0350] Condition 10:

[0351] Among them, s i (t) represents the signal of the second symbol, i is used to identify the symbol group where the second symbol is located, m represents the parameter for determining the frequency domain resource position of the first signal, m is an integer, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the second symbol, T CP represents the duration of the third CP, and T2 represents the duration of the second symbol.

[0352] The duration of the third CP can be the same as or different from the duration of the second symbol. For example, in the same case, it can be understood that T CP =T2.

[0353] It is understandable that the above two situations and expressions that meet the conditions are just examples. In actual applications, there may be other expressions, which are not specifically limited here.

[0354] Optionally, the s in each condition of this application i (t) may be a baseband signal to be transmitted.

[0355] Step 902: The first device sends a second signal to the second device.

[0356] After determining the second signal, the first device sends the second signal to the second device. Correspondingly, the second device receives the second signal sent by the first device.

[0357] Optionally, before step 902, the first device may further obtain configuration information, where the configuration information is used to indicate a resource set of the second signal, where the resource set includes a set of time domain and / or frequency domain resources.

[0358] Correspondingly, the second device may send configuration information to the first device.

[0359] The resource sets corresponding to different devices may be the same or different. Different devices may refer to devices with different capabilities or devices supporting different protocol versions.

[0360] Furthermore, different devices have different resource sets. For example, different resource sets may include any of the following: different time domain resources, different frequency domain resources, or different time-frequency resources.

[0361] Further, the frequency domain position of the second symbol is on the bandwidth of the subcarrier spacing of the third symbol, and the subcarrier spacing of the second symbol occupies a first frequency domain position among the N frequency domain positions.

[0362] Optionally, no signal is sent at other frequency domain positions other than the first frequency domain position. This signal can also be understood as any signal. In this way, other devices can send signals through other frequency domain positions, thereby reducing interference.

[0363] In this embodiment, N third symbols are converted into one second symbol, and the subcarrier spacing of the second symbol is 1 / N of that of the third symbol, resulting in a duration N times longer than the original. This means that the time domain becomes longer and the frequency domain becomes narrower. This approach allows devices to select more frequency domain positions during signal orthogonality, even when there is time domain overlap, thereby improving orthogonality.

[0364] The communication method in the embodiment of the present application is described above. The communication device in the embodiment of the present application is described below. Please refer to Figure 12, which is an embodiment of a communication device 1200 in the embodiment of the present application. The communication device 1200 can implement the functions of the terminal device or network device in the above method embodiment, and thus can also achieve the beneficial effects of the above method embodiment. In the embodiment of the present application, the communication device 1200 can be a communication device, or it can be an integrated circuit or component inside the communication device, such as a chip. The communication device 1200 includes: a transceiver unit 1201 and a processing unit 1202. Or the communication device 1200 includes: a transceiver unit 1201.

[0365] In one possible implementation, the communication device 1200 is the first device in the embodiments shown in FIG. 1 to FIG. 8B . In this case, the functions of the various units are as follows:

[0366] Processing unit 1202 is configured to determine a symbol group. The symbol group includes: a first cyclic prefix (CP), N time-domain symbols, and M second cyclic prefix (CPs), the N time-domain symbols include M time-domain symbols, each of the M time-domain symbols is preceded by a second CP, a duration of the first CP is related to a first difference, and the first difference is a difference between a preset duration and a total duration of the M second CPs, N is a positive integer greater than 1, and M is a positive integer greater than 0 and less than or equal to N.

[0367] The transceiver unit 1201 is configured to send the symbol group.

[0368] Optionally, the above-mentioned transceiver unit 1201 is further used to obtain configuration information, where the configuration information is used to indicate a resource set of a symbol group, where the resource set includes a set of time domain and / or frequency domain resources.

[0369] Optionally, the processing unit 1202 is specifically configured to detect a first signal after a first CP in a symbol group, where the first signal is a reference signal or a time domain signal of a data channel.

[0370] Optionally, the first CP is located before the first time domain symbol among the N time domain symbols, and the second CP is located before each time domain symbol among the M time domain symbols.

[0371] Optionally, the duration of the first CP is related to the first difference, including: the duration of the first CP is equal to the first difference.

[0372] Optionally, the above-mentioned M time domain symbols include the 2nd time domain symbol to the Nth time domain symbol in the N time domain symbols, and M=N-1.

[0373] Optionally, the first CP and a signal of the first time domain symbol among the N time domain symbols satisfy the following conditions:

[0374] Among them, s i (t) represents the signal of the first CP and the first time domain symbol, i is used to identify the symbol group, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the symbol group, T CP Indicates the duration of the first CP, T CP0 Indicates the duration of the second CP, and T1 indicates the preset duration.

[0375] Optionally, signals of M time domain symbols among the above-mentioned N time domain symbols meet the following conditions:

[0376] Among them, s i (t) represents the signal of M time domain symbols, i is used to identify the symbol group, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the symbol group, T CP Indicates the duration of the first CP, T CP0 Indicates the duration of the second CP, and T1 indicates the preset duration.

[0377] Optionally, the above M=N.

[0378] Optionally, the signal of the first CP satisfies the following conditions:

[0379] Among them, s i (t) represents the signal of the first CP, i is used to identify the symbol group, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the symbol group, T CP Indicates the duration of the first CP, T CP0 Indicates the duration of the second CP.

[0380] Optionally, the signals of the N time domain symbols satisfy the following conditions:

[0381] Among them, s i (t) represents a signal of N time domain symbols, i is used to identify the symbol group, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the symbol group, T CP Indicates the duration of the first CP, T CP0 Indicates the duration of the second CP, and T1 indicates the preset duration.

[0382] Optionally, the aforementioned devices with different capabilities, or devices supporting different protocol versions, have different resource sets.

[0383] Optionally, the different resource sets mentioned above are different, including any one of the following: different time domain resources, different frequency domain resources, or different time-frequency resources.

[0384] Optionally, the R symbols in the above symbol group are generated according to a first sequence and a first signal, R is a positive integer not greater than N, and the first signal is a reference signal or a time domain signal of a data channel.

[0385] Optionally, the above R symbols are M time domain symbols, or the R symbols are N time domain symbols.

[0386] Optionally, each of the R symbols is multiplied with each element in the first sequence, and each symbol is used to carry a signal obtained by multiplying the element and the first signal.

[0387] Optionally, the above symbol group is used to carry a random access signal, and the value of N is 5, and the duration of each time domain symbol is 8192T. s , the default duration is 2048T s , where T s is the basic time unit; or, the value of N is 5, the duration of each time domain symbol is 8192T s , the preset duration is 8192T s , where Ts is the basic time unit; or, the value of N is 3, the duration of each time domain symbol is 24576T s , the preset duration is 24576T s , where T s It is the basic time unit.

[0388] Optionally, the duration of the second CP is predefined or configured by signaling.

[0389] Optionally, the signal carried in the above-mentioned symbol group includes at least one of the following: a random access signal, a downlink synchronization signal, a channel sounding signal SRS, a channel state reference signal CSI-RS, a time domain symbol corresponding to a control channel, or a time domain symbol corresponding to a data channel.

[0390] In this embodiment, the operations performed by each unit in the communication device are similar to the description of the first device in the embodiments shown in Figures 1 to 8B above, and will not be repeated here.

[0391] In this embodiment, by adding a second CP before at least one symbol in the symbol group and limiting the relationship between the second CP before some symbols of the symbol group and the first CP before the first symbol, the inter-symbol interference between the symbol groups corresponding to different devices can be reduced, thereby improving the orthogonal effect.

[0392] In another possible implementation, the communication device 1200 is the second device in the embodiments shown in FIG. 1 to FIG. 8B . In this case, the functions of the various units are as follows:

[0393] The transceiver unit 1201 is configured to receive a symbol group. The symbol group includes: a first cyclic prefix (CP) and N time-domain symbols, the N time-domain symbols include M time-domain symbols, each of the M time-domain symbols is preceded by a second CP, a duration of the first CP is related to a first difference, the first difference is a difference between a preset duration and a total duration of the M second CPs, N is a positive integer greater than 1, and M is a positive integer greater than 0 and less than or equal to N;

[0394] The processing unit 1202 is configured to perform processing according to the symbol group.

[0395] Optionally, the above-mentioned transceiver unit 1201 is further used to send configuration information, where the configuration information is used to indicate a resource set of a symbol group, where the resource set includes a set of time domain and / or frequency domain resources.

[0396] Optionally, the processing unit 1202 is specifically configured to detect a first signal after a first CP in a symbol group, where the first signal is a reference signal or a time domain signal of a data channel.

[0397] Optionally, the first CP is located before the first time domain symbol among the N time domain symbols, and the second CP is located before each time domain symbol among the M time domain symbols.

[0398] Optionally, the duration of the first CP is related to the first difference, including: the duration of the first CP is equal to the first difference.

[0399] Optionally, the above-mentioned M time domain symbols include the 2nd time domain symbol to the Nth time domain symbol in the N time domain symbols, and M=N-1.

[0400] Optionally, the first CP and a signal of the first time domain symbol among the N time domain symbols satisfy the following conditions:

[0401] Among them, s i (t) represents the signal of the first CP and the first time domain symbol, i is used to identify the symbol group, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the symbol group, T CP Indicates the duration of the first CP, T CP0 Indicates the duration of the second CP, and T1 indicates the preset duration.

[0402] Optionally, signals of M time domain symbols among the above-mentioned N time domain symbols meet the following conditions:

[0403] Among them, s i (t) represents the signal of M time domain symbols, i is used to identify the symbol group, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the symbol group, T CP Indicates the duration of the first CP, T CP0 Indicates the duration of the second CP, and T1 indicates the preset duration.

[0404] Optionally, the above M=N.

[0405] Optionally, the signal of the first CP satisfies the following conditions:

[0406] Among them, s i (t) represents the signal of the first CP, i is used to identify the symbol group, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the symbol group, T CP Indicates the duration of the first CP, T CP0 Indicates the duration of the second CP.

[0407] Optionally, the signals of the N time domain symbols satisfy the following conditions:

[0408] Among them, s i (t) represents a signal of N time domain symbols, i is used to identify the symbol group, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the symbol group, T CP Indicates the duration of the first CP, T CP0 Indicates the duration of the second CP, and T1 indicates the preset duration.

[0409] Optionally, the aforementioned devices with different capabilities, or devices supporting different protocol versions, have different resource sets.

[0410] Optionally, the different resource sets mentioned above are different, including any one of the following: different time domain resources, different frequency domain resources, or different time-frequency resources.

[0411] Optionally, the R symbols in the above symbol group are generated according to a first sequence and a first signal, R is a positive integer not greater than N, and the first signal is a reference signal or a time domain signal of a data channel.

[0412] Optionally, the above R symbols are M time domain symbols, or the R symbols are N time domain symbols.

[0413] Optionally, each of the R symbols is multiplied with each element in the first sequence, and each symbol is used to carry a signal obtained by multiplying the element and the first signal.

[0414] Optionally, the above symbol group is used to carry a random access signal, and the value of N is 5, and the duration of each time domain symbol is 8192T. s , the default duration is 2048T s , where T s is the basic time unit; or, the value of N is 5, the duration of each time domain symbol is 8192T s , the preset duration is 8192T s , where T s is the basic time unit; or, the value of N is 3, the duration of each time domain symbol is 24576T s , the preset duration is 24576T s , where T s It is the basic time unit.

[0415] Optionally, the duration of the second CP is predefined or configured by signaling.

[0416] Optionally, the signal carried in the above-mentioned symbol group includes at least one of the following: a random access signal, a downlink synchronization signal, a channel sounding signal SRS, a channel state reference signal CSI-RS, a time domain symbol corresponding to a control channel, or a time domain symbol corresponding to a data channel.

[0417] In this embodiment, the operations performed by each unit in the communication device are similar to the description of the second device in the embodiments shown in Figures 1 to 8B above, and will not be repeated here.

[0418] In this embodiment, by adding a second CP before at least one symbol in the symbol group and limiting the relationship between the second CP before some symbols of the symbol group and the first CP before the first symbol, the inter-symbol interference between the symbol groups corresponding to different devices can be reduced, thereby improving the orthogonal effect.

[0419] In another possible implementation, the communication device 1200 is the first device in the embodiments shown in FIG. 9 to FIG. 11 . In this case, the functions of the various units are as follows:

[0420] The processing unit 1202 is configured to determine a second signal, where the second signal includes a third cyclic prefix (CP) of the second symbol and the second symbol, the duration of the second symbol is equal to the sum of the durations of N third symbols, and the subcarrier spacing of the second symbol is 1 / N of the subcarrier spacing of the third symbol, where N is a positive integer greater than or equal to 2.

[0421] The transceiver unit 1201 is configured to send a second signal.

[0422] Optionally, the above-mentioned acquisition unit is further used to acquire configuration information, where the configuration information is used to indicate a resource set of the second signal, and the resource set includes a set of time domain and / or frequency domain resources.

[0423] Optionally, the bandwidth of the second symbol is the subcarrier spacing of the third symbol.

[0424] Optionally, the frequency domain position of the second symbol is on the bandwidth of the subcarrier spacing of the third symbol, and the subcarrier spacing of the second symbol occupies a first frequency domain position among the N frequency domain positions.

[0425] Optionally, no signal is sent at other frequency domain positions other than the above-mentioned first frequency domain position.

[0426] Optionally, the subcarrier spacing of the third symbol includes any one of the following: 1.25 kHz, 3.75 kHz, 2.5 kHz, 5 kHz, 6.5 kHz, 10 kHz or 15 kHz.

[0427] Optionally, the second signal satisfies the following conditions:

[0428] Among them, s i (t) represents the second signal, i is used to identify the symbol group where the second symbol is located, m represents a parameter for determining the frequency domain resource position of the first signal, m is an integer, β represents an amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the second symbol, T CP represents the duration of the third CP, and T2 represents the duration of the second symbol.

[0429] Optionally, the second signal satisfies the following conditions:

[0430] Among them, s i (t) represents the signal of the second symbol, i is used to identify the symbol group where the second symbol is located, m represents the parameter for determining the frequency domain resource position of the first signal, m is an integer, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the second symbol, T CP represents the duration of the third CP, and T2 represents the duration of the second symbol.

[0431] Optionally, the above T CP =T2.

[0432] Optionally, the aforementioned devices with different capabilities, or devices supporting different protocol versions, have different resource sets.

[0433] Optionally, the different resource sets mentioned above are different, including any one of the following: different time domain resources, different frequency domain resources, or different time-frequency resources.

[0434] In this embodiment, the operations performed by each unit in the communication device are similar to the description of the first device in the embodiments shown in Figures 9 to 11 above, and will not be repeated here.

[0435] In this embodiment, by adding a second CP before at least one symbol in the symbol group and limiting the relationship between the second CP before some symbols of the symbol group and the first CP before the first symbol, the inter-symbol interference between the symbol groups corresponding to different devices can be reduced, thereby improving the orthogonal effect.

[0436] In another possible implementation, the communication device 1200 is the second device in the embodiments shown in FIG. 9 to FIG. 11 . In this case, the functions of the various units are as follows:

[0437] The transceiver unit 1201 is used to receive a second signal, where the second signal includes a third cyclic prefix CP of the second symbol and the second symbol, the duration of the second symbol is equal to the sum of the durations of N third symbols, and the subcarrier spacing of the second symbol is 1 / N of the subcarrier spacing of the third symbol, where N is a positive integer greater than or equal to 2.

[0438] Optionally, the above-mentioned transceiver unit 1201 is further used to send configuration information, where the configuration information is used to indicate a resource set of the second signal, and the resource set includes a set of time domain and / or frequency domain resources.

[0439] Optionally, the bandwidth of the second symbol is the subcarrier spacing of the third symbol.

[0440] Optionally, the frequency domain position of the second symbol is on the bandwidth of the subcarrier spacing of the third symbol, and the subcarrier spacing of the second symbol occupies a first frequency domain position among the N frequency domain positions.

[0441] Optionally, no signal is sent at other frequency domain positions other than the above-mentioned first frequency domain position.

[0442] Optionally, the subcarrier spacing of the third symbol includes any one of the following: 1.25 kHz, 3.75 kHz, 2.5 kHz, 5 kHz, 6.5 kHz, 10 kHz or 15 kHz.

[0443] Optionally, the second signal satisfies the following conditions:

[0444] Among them, s i (t) represents the second signal, i is used to identify the symbol group where the second symbol is located, m represents a parameter for determining the frequency domain resource position of the first signal, m is an integer, β represents an amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the second symbol, T CP represents the duration of the third CP, and T2 represents the duration of the second symbol.

[0445] Optionally, the second signal satisfies the following conditions:

[0446] Among them, s i (t) represents the signal of the second symbol, i is used to identify the symbol group where the second symbol is located, m represents the parameter for determining the frequency domain resource position of the first signal, m is an integer, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the second symbol, T CP represents the duration of the third CP, and T2 represents the duration of the second symbol.

[0447] Optionally, the above T CP =T2.

[0448] Optionally, the aforementioned devices with different capabilities, or devices supporting different protocol versions, have different resource sets.

[0449] Optionally, the different resource sets mentioned above are different, including any one of the following: different time domain resources, different frequency domain resources, or different time-frequency resources.

[0450] In this embodiment, the operations performed by each unit in the communication device are similar to the description of the second device in the embodiments shown in Figures 9 to 11 above, and will not be repeated here.

[0451] In this embodiment, by adding a second CP before at least one symbol in the symbol group and limiting the relationship between the second CP before some symbols of the symbol group and the first CP before the first symbol, the inter-symbol interference between the symbol groups corresponding to different devices can be reduced, thereby improving the orthogonal effect.

[0452] Please refer to Figure 13, which is another schematic structural diagram of a communication device 1300 provided in this application. The communication device 1300 includes a logic circuit 1301 and an input / output interface 1302. The communication device 1300 may be a chip or an integrated circuit.

[0453] The transceiver unit 1201 shown in FIG12 may be a communication interface, which may be the input / output interface 1302 in FIG13 , which may include an input interface and an output interface. Alternatively, the communication interface may be a transceiver circuit, which may include an input interface circuit and an output interface circuit. The processing unit 1202 shown in FIG12 may be the logic circuit 1301 in FIG13 .

[0454] Optionally, when the communication device is the first device in the aforementioned embodiment, the input / output interface 1302 is configured to at least one of: send a symbol group, send a second signal, and receive configuration information. The logic circuit 1301 is configured to determine a symbol group or a second signal.

[0455] Optionally, when the communication apparatus is the second device in the aforementioned embodiment, the input / output interface 1302 is used for at least one of the following: receiving a symbol group, receiving a second signal, and sending configuration information.

[0456] The logic circuit 1301 and the input / output interface 1302 may also execute other steps executed by the first device or the second device in any embodiment and achieve corresponding beneficial effects, which will not be described in detail here.

[0457] Optionally, the logic circuit 1301 may be a processing device, and the functions of the processing device may be partially or entirely implemented by software. The functions of the processing device may be partially or entirely implemented by software.

[0458] Optionally, the processing device may include a memory and a processor, wherein the memory is used to store a computer program, and the processor reads and executes the computer program stored in the memory to perform corresponding processing and / or steps in any one of the method embodiments.

[0459] Alternatively, the processing device may include only a processor. A memory for storing the computer program is located outside the processing device, and the processor is connected to the memory via circuits / wires to read and execute the computer program stored in the memory. The memory and processor may be integrated or physically separate.

[0460] Optionally, the processing device may be one or more chips, or one or more integrated circuits. For example, the processing device may be one or more field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), system-on-chips (SoCs), central processor units (CPUs), network processors (NPs), digital signal processors (DSPs), microcontroller units (MCUs), programmable logic devices (PLDs), or other integrated chips, or any combination of the above chips or processors.

[0461] Please refer to FIG. 14 , which shows a communication device 1400 involved in the above embodiments provided in an embodiment of the present application. Specifically, the communication device 1400 may be a communication device serving as a terminal device in the above embodiments.

[0462] Herein, a possible logical structure diagram of the communication device 1400 is shown. The communication device 1400 may include but is not limited to at least one processor 1401 and at least one communication port 1402 .

[0463] The transceiver unit 1201 shown in FIG12 may be a communication interface, which may be the communication port 1402 in FIG14 , which may include an input interface and an output interface. Alternatively, the communication port 1402 may be a transceiver circuit, which may include an input interface circuit and an output interface circuit.

[0464] It is understood that the communication port 1402 in FIG. 14 can be used to transmit at least one of the following: a symbol group, configuration information, or a second signal. For example, if the communication device 1400 is the first device in the aforementioned embodiment, the communication port 1402 is used to transmit at least one of the following: transmit a symbol group, transmit the second signal, or receive configuration information. For another example, if the communication device 1400 is the second device in the aforementioned embodiment, the communication port 1402 is used to receive at least one of the following: receive a symbol group, receive the second signal, or transmit configuration information.

[0465] Further optionally, the device may also include at least one of a memory 1403 and a bus. In an embodiment of the present application, the at least one processor 1401 is used to control and process the actions of the communication device 1400.

[0466] In addition, processor 1401 can be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It can implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. The processor can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and so on. Those skilled in the art will clearly understand that for the sake of convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0467] It is understood that the present application does not limit the number of components shown in Figure 14. For example, the number of processors 1401, the number of communication ports 1402, and the number of memories 1403 can be one or more, and are not specifically limited here.

[0468] It should be noted that the communication device 1400 shown in Figure 14 can be specifically used to implement the steps implemented by the terminal device in the aforementioned method embodiment and achieve the corresponding technical effects of the terminal device. The specific implementation methods of the communication device shown in Figure 14 can refer to the description in the aforementioned method embodiment and will not be repeated here.

[0469] Please refer to Figure 15, which is a structural diagram of the communication device 1500 involved in the above-mentioned embodiments provided in an embodiment of the present application. The communication device 1500 can specifically be a communication device serving as a network device in the above-mentioned embodiments, wherein the structure of the communication device can refer to the structure shown in Figure 15.

[0470] The communication device 1500 includes at least one processor 1511 and at least one network interface 1514. Further optionally, the communication device also includes at least one memory 1512, at least one transceiver 1513 and one or more antennas 1515. The processor 1511, the memory 1512, the transceiver 1513 and the network interface 1514 are connected, for example, via a bus. In an embodiment of the present application, the connection may include various interfaces, transmission lines or buses, etc., which are not limited in this embodiment. The antenna 1515 is connected to the transceiver 1513. The network interface 1514 is used to enable the communication device to communicate with other communication devices through a communication link. For example, the network interface 1514 may include a network interface between the communication device and the core network device, such as an S1 interface, and the network interface may include a network interface between the communication device and other communication devices (such as other network devices or core network devices), such as an X2 or Xn interface.

[0471] The transceiver unit 1201 shown in FIG12 may be a communication interface, which may be the network interface 1514 in FIG15 , which may include an input interface and an output interface. Alternatively, the network interface 1514 may be a transceiver circuit, which may include an input interface circuit and an output interface circuit.

[0472] Processor 1511 is primarily used to process communication protocols and communication data, control the entire communication device, execute software programs, and process software program data, for example, to support the communication device in performing the actions described in the embodiments. A communication device may include a baseband processor and a central processing unit. The baseband processor is primarily used to process communication protocols and communication data, while the central processing unit is primarily used to control the entire communication device, execute software programs, and process software program data. Processor 1511 in Figure 15 may integrate the functions of both a baseband processor and a central processing unit. Those skilled in the art will appreciate that the baseband processor and the central processing unit may also be independent processors interconnected via a bus or other technology. Those skilled in the art will appreciate that a communication device may include multiple baseband processors to accommodate different network standards, multiple central processing units to enhance processing capabilities, and various components of the communication device may be connected via various buses. The baseband processor may also be referred to as a baseband processing circuit or a baseband processing chip. The central processing unit may also be referred to as a central processing circuit or a central processing chip. The functionality for processing communication protocols and communication data may be built into the processor or stored in memory as a software program, which is executed by the processor to implement the baseband processing functionality.

[0473] The memory is primarily used to store software programs and data. Memory 1512 may be independent and connected to processor 1511. Alternatively, memory 1512 may be integrated with processor 1511, for example, within a single chip. Memory 1512 can store program code for executing the technical solutions of the embodiments of the present application, and execution is controlled by processor 1511. The various computer program codes executed may also be considered drivers for processor 1511.

[0474] Figure 15 shows only one memory and one processor. In an actual communication device, there may be multiple processors and multiple memories. The memory may also be referred to as a storage medium or storage device. The memory may be a storage element on the same chip as the processor, i.e., an on-chip storage element, or an independent storage element, which is not limited in the embodiments of the present application.

[0475] The transceiver 1513 can be used to support the reception or transmission of radio frequency signals between the communication device and the terminal. The transceiver 1513 can be connected to the antenna 1515. The transceiver 1513 includes a transmitter Tx and a receiver Rx. Specifically, one or more antennas 1515 can receive radio frequency signals. The receiver Rx of the transceiver 1513 is used to receive the radio frequency signal from the antenna, convert the radio frequency signal into a digital baseband signal or a digital intermediate frequency signal, and provide the digital baseband signal or digital intermediate frequency signal to the processor 1511 so that the processor 1511 can further process the digital baseband signal or digital intermediate frequency signal, such as demodulation and decoding. In addition, the transmitter Tx in the transceiver 1513 is also used to receive a modulated digital baseband signal or digital intermediate frequency signal from the processor 1511, convert the modulated digital baseband signal or digital intermediate frequency signal into a radio frequency signal, and transmit the radio frequency signal through one or more antennas 1515. Specifically, the receiver Rx can selectively perform one or more stages of down-mixing and analog-to-digital conversion on the RF signal to obtain a digital baseband signal or a digital intermediate frequency signal. The order of the down-mixing and analog-to-digital conversion processes is adjustable. The transmitter Tx can selectively perform one or more stages of up-mixing and digital-to-analog conversion on the modulated digital baseband signal or digital intermediate frequency signal to obtain a RF signal. The order of the up-mixing and digital-to-analog conversion processes is adjustable. The digital baseband signal and the digital intermediate frequency signal may be collectively referred to as digital signals.

[0476] The transceiver 1513 may also be referred to as a transceiver unit, a transceiver, a transceiver device, etc. Optionally, a device in the transceiver unit that implements a receiving function may be referred to as a receiving unit, and a device in the transceiver unit that implements a transmitting function may be referred to as a transmitting unit. That is, the transceiver unit includes a receiving unit and a transmitting unit. The receiving unit may also be referred to as a receiver, an input port, a receiving circuit, etc., and the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.

[0477] It should be noted that the communication device 1500 shown in Figure 15 can be specifically used to implement the steps implemented by the network device in the aforementioned method embodiment, and to achieve the corresponding technical effects of the network device. The specific implementation method of the communication device 1500 shown in Figure 15 can refer to the description in the aforementioned method embodiment, and will not be repeated here.

[0478] When the above-mentioned communication device is a chip applied to a terminal, the terminal chip implements the functions of the terminal in the above-mentioned method embodiment. The terminal chip receives information from other modules in the terminal (such as a radio frequency module or antenna), and the information is sent by the base station to the terminal; or the terminal chip sends information to other modules in the terminal (such as a radio frequency module or antenna), and the information is sent by the terminal to the base station. For example, when the first device is a terminal, the terminal sending the indication information can be understood as the process of the terminal chip outputting the indication information.

[0479] When the above-mentioned communication device is a module applied to a base station, the base station module implements the function of the base station in the above-mentioned method embodiment. The base station module receives information from other modules in the base station (such as a radio frequency module or an antenna), and the information is sent by the terminal to the base station; or, the base station module sends information to other modules in the base station (such as a radio frequency module or an antenna), and the information is sent by the base station to the terminal. The base station module here can be a baseband chip of the base station, or it can be a DU or other module. The DU here can be a DU under the open radio access network (O-RAN) architecture. For example, in the case where the network device is a base station, the base station sending indication information can be understood as the process of the base station chip outputting indication information.

[0480] The method steps in the embodiments of the present application can be implemented in hardware or in software instructions that can be executed by a processor. The software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, registers, hard disk, mobile hard disk, CD-ROM or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. The storage medium can also be an integral part of the processor. The processor and storage medium can be located in an ASIC. In addition, the ASIC can be located in a base station or a terminal. The processor and storage medium can also exist in a base station or a terminal as discrete components.

[0481] In the above embodiments, all or part of the embodiments may be implemented using software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are performed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device, or other programmable device. The computer program or instructions may be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program or instructions may be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; an optical medium, such as a digital video disk; or a semiconductor medium, such as a solid-state drive. The computer-readable storage medium may be a volatile or nonvolatile storage medium, or may include both volatile and nonvolatile types of storage media.

[0482] In the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

Claims

1. A communication method, characterized in that: The method comprises: Determine a symbol group, where the symbol group includes: a first cyclic prefix (CP), N time-domain symbols, and M second cyclic prefix (CPs), where the N time-domain symbols include M time-domain symbols, each of the M time-domain symbols is preceded by the second CP, where a duration of the first CP is related to a first difference, where the first difference is a difference between a preset duration and a total duration of the M second CPs, where N is a positive integer greater than 1, and M is a positive integer greater than 0 and less than or equal to N; The symbol group is transmitted.

2. The method according to claim 1, characterized in that The method further comprises: Configuration information is acquired, where the configuration information is used to indicate a resource set of the symbol group, where the resource set includes a set of time domain and / or frequency domain resources.

3. A communication method, characterized in that: The method comprises: Receive a symbol group, the symbol group comprising: the symbol group comprising a first cyclic prefix (CP) and N time domain symbols, the N time domain symbols comprising M time domain symbols, each of the M time domain symbols being preceded by a second CP, the duration of the first CP being related to a first difference, the first difference being a difference between a preset duration and a total duration of the M second CPs, N being a positive integer greater than 1, and M being a positive integer greater than 0 and less than or equal to N; Processing is performed according to the symbol group.

4. The method according to claim 3, characterized in that Before receiving the first signal on the symbol group, the method further includes: Configuration information is sent, where the configuration information is used to indicate a resource set of the symbol group, where the resource set includes a set of time domain and / or frequency domain resources.

5. The method according to claim 3 or 4, characterized in that The processing according to the symbol group includes: A first signal is detected after the first CP in the symbol group, where the first signal is a reference signal or a time domain signal of a data channel.

6. The method according to any one of claims 1 to 5, characterized in that The first CP is located before a first time domain symbol among the N time domain symbols, and the second CP is located before each time domain symbol among the M time domain symbols.

7. The method according to any one of claims 1 to 6, characterized in that The duration of the first CP is related to the first difference, including: the duration of the first CP is equal to the first difference.

8. The method according to any one of claims 1 to 7, characterized in that The M time domain symbols include the 2nd time domain symbol to the Nth time domain symbol among the N time domain symbols, and M=N-1.

9. The method according to claim 8, characterized in that The first CP and a signal of the first time domain symbol among the N time domain symbols meet the following conditions: Among them, s i (t) represents the signal of the first CP and the first time domain symbol, i is used to identify the symbol group, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the symbol group, T CP Indicates the duration of the first CP, T CP0 represents the duration of the second CP, and T1 represents the preset duration.

10. The method according to claim 8 or 9, characterized in that The signals of M time domain symbols among the N time domain symbols meet the following conditions: Among them, s i (t) represents the signal of the M time domain symbols, i is used to identify the symbol group, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the symbol group, T CP Indicates the duration of the first CP, T CP0 represents the duration of the second CP, and T1 represents the preset duration.

11. The method according to any one of claims 1 to 7, characterized in that M=N.

12. The method according to claim 11, characterized in that The signal of the first CP meets the following conditions: Among them, s i (t) represents the signal of the first CP, i is used to identify the symbol group, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the symbol group, T CP Indicates the duration of the first CP, T CP0 Indicates the duration of the second CP.

13. The method according to claim 11 or 12, characterized in that The signals of the N time domain symbols meet the following conditions: Among them, s i (t) represents the signal of the N time domain symbols, i is used to identify the symbol group, β represents the amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the symbol group, T CP Indicates the duration of the first CP, T CP0 represents the duration of the second CP, and T1 represents the preset duration.

14. The method according to claim 2 or 4, characterized in that Devices with different capabilities or devices supporting different protocol versions have different resource sets.

15. The method according to claim 14, characterized in that Different resource sets are different, including any of the following: different time domain resources, different frequency domain resources, or different time-frequency resources.

16. The method according to any one of claims 1 to 15, characterized in that The R symbols in the symbol group are generated according to a first sequence and a first signal, where R is a positive integer not greater than N, and the first signal is a reference signal or a time domain signal of a data channel.

17. The method according to claim 16, characterized in that The R symbols are the M time domain symbols, or the R symbols are the N time domain symbols.

18. The method according to claim 16 or 17, characterized in that Each symbol in the R symbols is multiplied with each element in the first sequence, and each symbol is used to carry a signal obtained by multiplying the element and the first signal.

19. The method according to any one of claims 1 to 18, characterized in that The symbol group is used to carry a random access signal, and The value of N is 5, and the duration of each time domain symbol is 8192T s , the preset duration is 2048T s , where T s is the basic time unit; or, The value of N is 5, and the duration of each time domain symbol is 8192T s The preset duration is 8192T s , where T s is the basic time unit; or, The value of N is 3, and the duration of each time domain symbol is 24576T s , the preset duration is 24576T s , where T s It is the basic time unit.

20. The method according to any one of claims 1 to 19, characterized in that The duration of the second CP is predefined or configured by signaling.

21. The method according to any one of claims 1 to 20, characterized in that The signal carried in the symbol group includes at least one of the following: a random access signal, a downlink synchronization signal, a channel sounding signal SRS, a channel state reference signal CSI-RS, a time domain symbol corresponding to a control channel, or a time domain symbol corresponding to a data channel.

22. A communication method, characterized in that: The method comprises: Determine a second signal, where the second signal includes a third cyclic prefix CP of the second symbol and the second symbol, a duration of the second symbol is equal to the sum of durations of N third symbols, and a subcarrier spacing of the second symbol is 1 / N of the subcarrier spacing of the third symbol, where N is a positive integer greater than or equal to 2; The second signal is sent.

23. The method according to claim 22, characterized in that The method further comprises: Configuration information is acquired, where the configuration information is used to indicate a resource set of the second signal, where the resource set includes a set of time domain and / or frequency domain resources.

24. A communication method, characterized in that: The method comprises: Receive a second signal, where the second signal includes a third cyclic prefix CP of a second symbol and the second symbol, the duration of the second symbol is equal to the sum of the durations of N third symbols, and the subcarrier spacing of the second symbol is 1 / N of the subcarrier spacing of the third symbol, where N is a positive integer greater than or equal to 2.

25. The method according to claim 24, characterized in that Before receiving the second signal, the method further includes: Configuration information is sent, where the configuration information is used to indicate a resource set of the second signal, where the resource set includes a set of time domain and / or frequency domain resources.

26. The method according to any one of claims 22 to 25, characterized in that The bandwidth of the second symbol is the subcarrier spacing of the third symbol.

27. The method according to claim 26, characterized in that The frequency domain position of the second symbol is on the bandwidth of the subcarrier spacing of the third symbol, and the subcarrier spacing of the second symbol occupies a first frequency domain position among the N frequency domain positions.

28. The method according to claim 27, characterized in that No signal is sent at other frequency domain positions other than the first frequency domain position.

29. The method according to any one of claims 22 to 28, characterized in that The subcarrier spacing of the third symbol includes any one of the following: 1.25 kHz, 3.75 kHz, 2.5 kHz, 5 kHz, 6.5 kHz, 10 kHz or 15 kHz.

30. The method according to any one of claims 22 to 29, characterized in that The second signal satisfies the following conditions: Among them, s i (t) represents the second signal, i is used to identify the symbol group where the second symbol is located, m represents a parameter for determining the frequency domain resource position of the first signal, m is an integer, β represents an amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the second symbol, T CP represents the duration of the third CP, and T2 represents the duration of the second symbol.

31. The method according to any one of claims 22 to 29, characterized in that The second signal satisfies the following conditions: Among them, s i (t) represents the signal of the second symbol, i is used to identify the symbol group where the second symbol is located, m represents a parameter for determining the frequency domain resource position of the first signal, m is an integer, β represents an amplitude factor, n(i) represents the frequency position of the i-th symbol group, K is an integer, k0 is an integer, Δf represents the subcarrier spacing of the second symbol, T CP represents the duration of the third CP, and T2 represents the duration of the second symbol.

32. The method according to claim 31, characterized in that T CP =T2。 33. The method according to claim 23 or 25, characterized in that Devices with different capabilities or devices supporting different protocol versions have different resource sets.

34. The method according to claim 33, wherein Different resource sets are different, including any of the following: different time domain resources, different frequency domain resources, or different time-frequency resources.

35. A communication device, characterized in that: The communication device includes: a processing unit and a transceiver unit; The processing unit and the transceiver unit are configured to execute the method according to any one of claims 1 to 34.

36. A communication device, characterized in that The method comprises at least one processor coupled to at least one memory; the at least one processor is configured to execute the method according to any one of claims 1 to 34.

37. A chip or a chip system, characterized in that: The chip or chip system is used to perform the method according to any one of claims 1 to 34.

38. A communication system, characterized in that: A communication device comprising a method for executing any one of claims 1, 6-21, and a communication device for executing any one of claims 2-21, or a communication device comprising a method for executing any one of claims 22, 23, 26-34, and a communication device for executing any one of claims 24-34.

39. A readable storage medium, characterized in that The storage medium stores a computer program or instruction, and when the computer program or instruction is executed by the communication device, the method according to any one of claims 1 to 34 is implemented.

40. A computer program product, characterized in that The method comprises instructions which, when executed on a computer, cause the computer to perform the method according to any one of claims 1 to 34.

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