Communication method, communication device, communication system and storage medium

Abstract

Provided in the present disclosure are a communication method, an apparatus, a device and a storage medium. The method comprises: determining an orthogonal cover code (OCC) sequence corresponding to a narrowband physical random access channel (NPRACH) of a terminal; determining an OCC multiplexing mode of the NPRACH; and on the basis of the OCC sequence and the OCC multiplexing mode, transmitting the NPRACH. The method in the present disclosure realizes uplink capacity enhancement and system capacity expansion, such that more terminals can be supported to perform uplink transmission under the premise of limited time-frequency resources, and a limited transmission power of the terminals, thereby improving the uplink transmission efficiency.

Description

Communication method, communication device, communication system, and storage medium Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a communication method, a communication device, a communication system, and a storage medium. Background Art

[0002] In the Internet of Things Non-terrestrial Network (IoTNTN) system, orthogonal cover code (OCC) technology is introduced for the narrowband physical random access channel (NPRACH) transmitted by terminals. This technology enables multi-user multiplexing on the same time-frequency resources, achieving uplink capacity enhancement. However, how to implement multi-user multiplexing on the NPRACH based on OCC technology is a technical problem that needs to be solved urgently.

[0003] Summary of the Invention

[0004] The present disclosure provides a communication method, a communication device, a communication system, and a storage medium.

[0005] According to a first aspect of an embodiment of the present disclosure, a communication method is proposed, which is executed by a terminal and includes:

[0006] Determine an orthogonal cover code OCC sequence corresponding to a narrowband physical random access channel NPRACH of the terminal;

[0007] Determine an OCC multiplexing mode of the NPRACH;

[0008] The NPRACH is sent based on the OCC sequence and the OCC multiplexing mode.

[0009] According to a second aspect of an embodiment of the present disclosure, a communication method is provided, which is performed by a network device. The method includes:

[0010] Determine the OCC sequence corresponding to the NPRACH of the terminal;

[0011] Determine an OCC multiplexing mode of the NPRACH;

[0012] The NPRACH is received based on the OCC sequence and the OCC multiplexing mode.

[0013] According to a third aspect of an embodiment of the present disclosure, a communication method is provided for use in a communication system, the communication system including a terminal and a network device, the method including at least one of the following:

[0014] The terminal determines an OCC sequence corresponding to the NPRACH of the terminal;

[0015] The terminal determines an OCC multiplexing mode of the NPRACH;

[0016] The terminal sends the NPRACH based on the OCC sequence and the OCC multiplexing mode;

[0017] The network device determines an OCC sequence corresponding to the NPRACH;

[0018] The network device determines an OCC multiplexing mode of the NPRACH;

[0019] The network device receives the NPRACH based on the OCC sequence and the OCC multiplexing mode.

[0020] According to a fourth aspect of an embodiment of the present disclosure, a terminal is provided, including:

[0021] a processing module, configured to determine an OCC sequence corresponding to the NPRACH of the terminal;

[0022] The processing module is further configured to determine an OCC multiplexing mode of the NPRACH;

[0023] A transceiver module is configured to send the NPRACH based on the OCC sequence and the OCC multiplexing mode.

[0024] According to a fifth aspect of an embodiment of the present disclosure, a network device is provided, including:

[0025] A processing module, configured to determine an OCC sequence corresponding to the NPRACH of the terminal;

[0026] The processing module is further configured to determine an OCC multiplexing mode of the NPRACH;

[0027] A transceiver module is configured to receive the NPRACH based on the OCC sequence and the OCC multiplexing mode.

[0028] According to a sixth aspect of an embodiment of the present disclosure, a communication device is provided, including:

[0029] one or more processors;

[0030] The processor is used to call instructions to enable the communication device to execute the communication method described in any one of the first aspect to the second aspect.

[0031] According to the seventh aspect of an embodiment of the present disclosure, a communication system is proposed, characterized in that it includes a terminal and a network device, wherein the network device is configured to implement the communication method described in the first aspect, and the terminal is configured to implement the communication method described in the second aspect.

[0032] According to an eighth aspect of an embodiment of the present disclosure, a storage medium is proposed, which stores instructions, and is characterized in that when the instructions are executed on a communication device, the communication device executes the communication method as described in any one of the first to second aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0034] FIG1 is a schematic diagram of the architecture of some communication systems provided by embodiments of the present disclosure;

[0035] FIG2A is a flow chart of a communication method provided in yet another embodiment of the present disclosure;

[0036] 2B-2D are schematic diagrams showing protocol preset tables according to an embodiment of the present disclosure;

[0037] FIG2E is a schematic diagram illustrating OCC sequence mapping according to an embodiment of the present disclosure;

[0038] FIG3A is a flow chart of a communication method provided in yet another embodiment of the present disclosure;

[0039] FIG3B is a flow chart of a communication method provided in yet another embodiment of the present disclosure;

[0040] FIG4A is a flow chart of a communication method provided in yet another embodiment of the present disclosure;

[0041] FIG4B is a flow chart of a communication method provided in yet another embodiment of the present disclosure;

[0042] FIG5 is a flow chart of a communication method provided in yet another embodiment of the present disclosure;

[0043] FIG6A is a schematic structural diagram of a terminal provided by an embodiment of the present disclosure;

[0044] FIG6B is a schematic diagram of the structure of a network device provided by an embodiment of the present disclosure;

[0045] FIG7A is a schematic structural diagram of a communication device provided by an embodiment of the present disclosure;

[0046] FIG7B is a schematic structural diagram of a chip provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0047] The embodiments of the present disclosure provide a communication method, a communication device, a communication system, and a storage medium.

[0048] In a first aspect, an embodiment of the present disclosure provides a communication method, which is executed by a terminal. The method includes:

[0049] Determine an orthogonal cover code OCC sequence corresponding to a narrowband physical random access channel NPRACH of the terminal;

[0050] Determine an OCC multiplexing mode of the NPRACH;

[0051] The NPRACH is sent based on the OCC sequence and the OCC multiplexing mode.

[0052] In the above embodiment, a method is provided for a terminal to send an NPRACH based on the OCC technology. By executing the method of the present disclosure, different terminals can respectively use different OCC sequences to multiplex and send their own NPRACHs on the same time-frequency resources. In addition, a network device can determine the NPRACH of each terminal on the same time-frequency resources based on the OCC sequence corresponding to the terminal, so that the NPRACH can be multiplexed and sent by multiple users on the same time-frequency resources, thereby achieving uplink capacity enhancement and system expansion. Under the premise of limited time-frequency resources and limited terminal transmit power, more terminals can be supported for uplink transmission, thereby improving uplink transmission efficiency.

[0053] In conjunction with some embodiments of the first aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0054] Determine a first length, where the first length is: a sequence length of an OCC sequence corresponding to the NPRACH;

[0055] Determine an OCC multiplexing mode of the NPRACH based on the first length.

[0056] In conjunction with some embodiments of the first aspect, in some embodiments, determining the first length includes at least one of the following:

[0057] Determining the first length based on a protocol preset;

[0058] determining the first length based on a configuration of the network device;

[0059] The first length is determined based on an indication from a network device.

[0060] In the above embodiment, a method is provided for a terminal to determine a first length, so that the terminal can successfully determine the first length. As a result, the terminal can subsequently successfully determine the OCC multiplexing mode of the NPRACH based on the determined first length, and send the NPRACH based on the OCC multiplexing mode. This implements multi-user multiplexing transmission of the NPRACH, enhances uplink capacity, and achieves system expansion. Under the premise of limited time-frequency resources and limited terminal transmit power, more terminals can be supported for uplink transmission, thereby improving uplink transmission efficiency.

[0061] In conjunction with some embodiments of the first aspect, in some embodiments, determining the first length includes:

[0062] The first length is determined based on the number of symbols symbol of the NPRACH.

[0063] In conjunction with some embodiments of the first aspect, in some embodiments, determining the first length based on the number of symbols of the NPRACH includes:

[0064] The first length is determined to be a first value, where the first value is: the total number of symbols in a symbol group of the NPRACH.

[0065] In conjunction with some embodiments of the first aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0066] The OCC multiplexing mode is determined as follows: different sequence values ​​in the OCC sequence are respectively mapped to different symbols in the symbol group.

[0067] In combination with some embodiments of the first aspect, in some embodiments, different symbol groups transmitted by the same NPRACH use the same OCC multiplexing mode and the same OCC sequence.

[0068] In combination with some embodiments of the first aspect, in some embodiments, the first length satisfies the following condition: the total number of symbols in one NPRACH transmission is an integer multiple of the first length.

[0069] In conjunction with some embodiments of the first aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0070] Numbering symbols in the NPRACH transmission once to obtain a symbol index;

[0071] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0072] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol corresponding to the symbol index "x1", where x1 and j satisfy at least one of the following conditions:

[0073] First condition: j=x1 mod L; wherein L is the first length, and the mod function is a remainder function; the first condition is used to map one of the sequence values ​​to one symbol;

[0074] The second condition: j=floor(x1 / M1) mod L; wherein the second condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbols; the M1 indicates the number of symbols to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

[0075] In conjunction with some embodiments of the first aspect, in some embodiments, M1 satisfies the following condition: the product of M1, L, and K1 is equal to the total number of symbols in one NPRACH transmission; wherein K1 indicates the number of repeated mappings of the OCC sequence in one NPRACH transmission;

[0076] The M1 and / or K1 are provided by at least one of the following methods:

[0077] Determining the M1 and / or K1 based on the network device configuration;

[0078] Determine the M1 and / or K1 based on the protocol preset;

[0079] Determine the M1 and / or K1 based on a first association relationship, where the first association relationship is: an association relationship between the number of symbol groups in one NPRACH transmission and the M1 and / or K1;

[0080] Determine the M1 and / or K1 based on a second association relationship, where the second association relationship is: an association relationship between the first length and the M1 and / or K1;

[0081] The M1 and / or K1 are determined based on a third association relationship, where the third association relationship is: an association relationship between the total number of symbols in a symbol group of the NPRACH and the M1 and / or K1.

[0082] In combination with some embodiments of the first aspect, in some embodiments, different repeated transmissions of the same NPRACH use the same OCC multiplexing mode and the same OCC sequence.

[0083] In combination with some embodiments of the first aspect, in some embodiments, the first length satisfies the following conditions: the total number of symbols in the N NPRACH transmissions is an integer multiple of the first length; and N is determined by the total number of repeated transmissions of the NPRACH.

[0084] In conjunction with some embodiments of the first aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0085] Numbering symbols in the N NPRACH transmissions to obtain symbol indexes;

[0086] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0087] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol corresponding to the symbol index "x2", where x2 and j satisfy at least one of the following conditions:

[0088] The third condition: j=x2 mod L; wherein L is the first length and the mod function is a remainder function; the third condition is used to map one of the sequence values ​​to one symbol;

[0089] The fourth condition: j=floor(x2 / M1) mod L; wherein the fourth condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbols; M1 indicates the number of symbols to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

[0090] In conjunction with some embodiments of the first aspect, in some embodiments, M1 satisfies the following condition: the product of M1, L, and K2 is equal to the total number of symbols in the N NPRACH transmissions; wherein K2 indicates the number of repeated mappings of the OCC sequence in the N NPRACH transmissions;

[0091] The M1 and / or K2 are in at least one of the following ways:

[0092] Determining the M1 and / or K2 based on the network device configuration;

[0093] Determine the M1 and / or K2 based on the protocol preset;

[0094] Determine the M1 and / or K2 based on a fourth association relationship, where the fourth association relationship is: an association relationship between the number of symbol groups in one NPRACH transmission and the M1 and / or K2;

[0095] Determine the M1 and / or K2 based on a fifth association relationship, where the fifth association relationship is: an association relationship between the first length and the M1 and / or K2;

[0096] Determine the M1 and / or K2 based on a sixth association relationship, where the sixth association relationship is: an association relationship between the number of symbol groups in the N NPRACH transmissions and the M1 and / or K2;

[0097] Determine the M1 and / or K2 based on a seventh association relationship, where the seventh association relationship is: an association relationship between a total number of symbols in the N NPRACH transmissions and the M1 and / or K2;

[0098] The M1 and / or K2 are determined based on an eighth association relationship, where the eighth association relationship is: an association relationship between N and the M1 and / or K2.

[0099] In conjunction with some embodiments of the first aspect, in some embodiments, determining the first length includes:

[0100] The first length is determined based on the number of symbol groups of the NPRACH.

[0101] In conjunction with some embodiments of the first aspect, in some embodiments, determining the first length based on the number of symbol groups of the NPRACH includes:

[0102] Determine the first length as a second value, where the second value is: the total number of symbol groups transmitted in one NPRACH transmission.

[0103] In conjunction with some embodiments of the first aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0104] The OCC multiplexing mode is determined as follows: different sequence values ​​in the OCC sequence are respectively mapped to symbols of different symbol groups.

[0105] In combination with some embodiments of the first aspect, in some embodiments, different repeated transmissions of the same NPRACH use the same OCC multiplexing mode and the same OCC sequence.

[0106] In combination with some embodiments of the first aspect, in some embodiments, it is characterized in that the first length satisfies the following condition: the total number of symbol groups in one NPRACH transmission is an integer multiple of the first length.

[0107] In combination with some embodiments of the first aspect, in some embodiments, it is characterized in that determining the OCC multiplexing mode of the NPRACH includes:

[0108] Numbering a symbol group in the NPRACH transmission to obtain a symbol group index;

[0109] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0110] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol in the symbol group corresponding to the symbol group index "i1", where i1 and j satisfy at least one of the following conditions:

[0111] Fifth condition: j=i1 mod L; wherein L is the first length and the mod function is a remainder function; the fifth condition is used to map one of the sequence values ​​to one symbol group;

[0112] The sixth condition: j=floor(i1 / M2) mod L; wherein the sixth condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbol groups; M2 indicates the number of symbol groups to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

[0113] In conjunction with some embodiments of the first aspect, in some embodiments, the product of M2, L, and K3 is equal to the total number of symbol groups in one NPRACH transmission; wherein K3 indicates the number of repeated mappings of the OCC sequence in one NPRACH transmission;

[0114] The M2 and / or K3 are in at least one of the following ways:

[0115] Determining the M2 and / or K3 based on the network device configuration;

[0116] The M2 and / or K3 are determined based on protocol presets.

[0117] In combination with some embodiments of the first aspect, in some embodiments, different repeated transmissions of the same NPRACH use the same OCC multiplexing mode and the same OCC sequence.

[0118] In combination with some embodiments of the first aspect, in some embodiments, the first length satisfies the following conditions: the total number of symbol groups in the N NPRACH transmissions is an integer multiple of the first length; and N is determined by the total number of repeated transmissions of the NPRACH.

[0119] In conjunction with some embodiments of the first aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0120] Numbering the symbol groups in the N NPRACH transmissions to obtain a symbol group index;

[0121] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0122] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol in the symbol group corresponding to the symbol group index "i2", where i2 and j satisfy at least one of the following conditions:

[0123] Seventh condition: j=i2 mod L; wherein L is the first length, and the mod function is a remainder function; the seventh condition is used to map one of the sequence values ​​to one symbol group;

[0124] The eighth condition: j=floor(x2 / M2)mod L; wherein the eighth condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbol groups; M2 indicates the number of symbol groups to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

[0125] In conjunction with some embodiments of the first aspect, in some embodiments, the product of M2, L, and K4 is equal to the total number of symbol groups in the N NPRACH transmissions; wherein K4 indicates the number of repeated mappings of the OCC sequence in the N NPRACH transmissions;

[0126] The M2 and / or K4 are provided by at least one of the following methods:

[0127] Determining the M2 and / or K4 based on the network device configuration;

[0128] The M2 and / or K4 are determined based on protocol presets.

[0129] In conjunction with some embodiments of the first aspect, in some embodiments, determining the first length includes:

[0130] The first length is determined based on the number of repeated transmissions of the NPRACH.

[0131] In combination with some embodiments of the first aspect, in some embodiments, the first length satisfies the following conditions: N is an integer multiple of the first length; and N is determined by the total number of repeated transmissions of the NPRACH.

[0132] In conjunction with some embodiments of the first aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0133] Numbering the number of repeated transmissions of the NPRACH to obtain a number index;

[0134] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0135] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol of the NPRACH transmission corresponding to the number index "f", where f and j satisfy at least one of the following conditions:

[0136] Ninth condition: j=f mod L; wherein L is the first length and the mod function is a remainder function; the ninth condition is used to map one sequence value to one NPRACH transmission;

[0137] The tenth condition: j = floor(f / M3) mod L; wherein the tenth condition is used to enable one sequence value to be continuously mapped to multiple NPRACH transmissions; M3 indicates the number of NPRACH transmissions to which one sequence value is continuously mapped, and the floor function is a floor function.

[0138] In conjunction with some embodiments of the first aspect, in some embodiments, the product of M3, L, and K5 is equal to N; wherein K5 indicates the number of repeated mappings of the OCC sequence in the N NPRACH transmissions;

[0139] The M3 and / or K5 are provided by at least one of the following methods:

[0140] Determining the M3 and / or K5 based on the network device configuration;

[0141] The M3 and / or K5 are determined based on protocol presets.

[0142] In conjunction with some embodiments of the first aspect, in some embodiments, determining the OCC sequence corresponding to the NPRACH includes at least one of the following:

[0143] Determining the OCC sequence based on a protocol preset table;

[0144] Determining the OCC sequence based on a configuration of a network device;

[0145] Determining the OCC sequence based on an indication from a network device;

[0146] Determine the OCC sequence based on a protocol preset sequence generation method;

[0147] The determined sequence length of the OCC sequence is the first length.

[0148] In the above embodiment, a method is provided for a terminal to determine the OCC multiplexing mode of the NPRACH, so that the terminal can successfully determine the OCC multiplexing mode of the NPRACH and subsequently send the NPRACH based on the OCC multiplexing mode, thereby realizing multi-user multiplexing transmission of the NPRACH, enhancing uplink capacity, and realizing system expansion. Therefore, under the premise of limited time-frequency resources and limited terminal transmission power, more terminals can be supported for uplink transmission, thereby improving uplink transmission efficiency.

[0149] In combination with some embodiments of the first aspect, in some embodiments, different coverage enhancement CE levels of the NPRACH correspond to first lengths, respectively, and the first lengths corresponding to different CE levels are the same or different; and / or

[0150] The different formats of the NPRACH respectively correspond to a first length, and the first lengths corresponding to the different formats are the same or different; and / or

[0151] The NPRACHs with different numbers of repeated transmissions respectively correspond to first lengths, and the first lengths corresponding to the NPRACHs with different numbers of repeated transmissions are the same or different.

[0152] In the above embodiment, different CEs, different formats, and different repetition times of the NPRACH correspond to first lengths, and the corresponding first lengths may be the same or different. Since the OCC multiplexing mode may be determined based on the first length, when the first lengths corresponding to different CEs, different formats, and different repetition times of the NPRACH may be the same or different, the OCC multiplexing modes corresponding to the different CEs, different formats, and different repetition times of the NPRACH may also be the same or different, thereby improving the flexibility of OCC multiplexing.

[0153] In combination with some embodiments of the first aspect, in some embodiments, the first length is greater than or equal to the number of multiplexed users.

[0154] In combination with some embodiments of the first aspect, in some embodiments, the OCC sequence is a cyclic shift sequence, and the first length is greater than the number of multiplexed users.

[0155] In the above embodiment, the OCC sequence may be a cyclic shift sequence. Optionally, when the OCC sequence is a cyclic shift sequence, the orthogonality between the OCC sequences corresponding to different terminals may be better. When multi-user multiplexing and transmission of NPRACH is performed based on the OCC sequence with better orthogonality, better multiplexing performance may be achieved. Thus, the method disclosed herein may improve the performance of multi-user multiplexing and transmission of NPRACH.

[0156] In conjunction with some embodiments of the first aspect, in some embodiments, OCC sequences corresponding to different terminals on the same resource are orthogonal; and / or

[0157] The mutual correlation between OCC sequences corresponding to different terminals on the same resource is less than a first threshold.

[0158] In the above embodiment, since the OCC sequences between different terminals are mutually orthogonal or have low mutual correlation, when the OCC sequence of each terminal is used to send the NPRACH of each terminal in the same time-frequency resource, the mutual interference between the NPRACHs of different terminals can be reduced, thereby ensuring the stability of the NPRACH during multi-user multiplexing transmission.

[0159] In combination with some embodiments of the first aspect, in some embodiments, each CP except the first cyclic prefix CP in the N repeated transmissions of the NPRACH is mapped as a symbol to the sequence value of the OCC sequence.

[0160] In the above embodiment, each cyclic prefix (CP) except the first CP in the N repeated transmissions of NPRACH is also mapped as a symbol to the sequence value of the OCC sequence. Therefore, when the OCC mapping is performed on the NPRACH, the CP in the NPRACH is also taken into account, thereby realizing multi-user multiplexing of the NPRACH in a more comprehensive manner.

[0161] In combination with some embodiments of the first aspect, in some embodiments, different coverage enhancement CE levels of the NPRACH correspond to OCC multiplexing modes, and the OCC multiplexing modes corresponding to different CE levels are the same or different; and / or

[0162] The different formats of the NPRACH respectively correspond to OCC multiplexing modes, and the OCC multiplexing modes corresponding to the different formats are the same or different; and / or

[0163] The NPRACHs with different repeated transmission times correspond to OCC multiplexing modes respectively, and the OCC multiplexing modes corresponding to the NPRACHs with different repeated transmission times are the same or different.

[0164] In the above embodiment, the OCC multiplexing modes corresponding to different CEs, different formats, and different repetition transmission times of the NPRACH may be different or the same, thereby improving the flexibility of OCC multiplexing.

[0165] In a second aspect, an embodiment of the present disclosure provides a communication method, which is performed by a network device. The method includes:

[0166] Determine the OCC sequence corresponding to the NPRACH of the terminal;

[0167] Determine an OCC multiplexing mode of the NPRACH;

[0168] The NPRACH is received based on the OCC sequence and the OCC multiplexing mode.

[0169] In the above embodiment, a method is provided for a terminal to send an NPRACH based on the OCC technology. By executing the method of the present disclosure, different terminals can respectively use different OCC sequences to multiplex and send their own NPRACHs on the same time-frequency resources. In addition, a network device can determine the NPRACH of each terminal on the same time-frequency resources based on the OCC sequence corresponding to the terminal, so that the NPRACH can be multiplexed and sent by multiple users on the same time-frequency resources, thereby achieving uplink capacity enhancement and system expansion. Under the premise of limited time-frequency resources and limited terminal transmit power, more terminals can be supported for uplink transmission, thereby improving uplink transmission efficiency.

[0170] In conjunction with some embodiments of the second aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0171] Determine a first length, where the first length is: a sequence length of an OCC sequence corresponding to the NPRACH;

[0172] Determine an OCC multiplexing mode of the NPRACH based on the first length.

[0173] In conjunction with some embodiments of the second aspect, in some embodiments, determining the first length includes:

[0174] The first length is determined based on protocol presets and / or autonomously by the network device.

[0175] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0176] The first length is configured for the terminal.

[0177] In combination with some embodiments of the second aspect, in some embodiments, the first length is a first value, and the first value is: the total number of symbols in a symbol group of the NPRACH.

[0178] In conjunction with some embodiments of the second aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0179] The OCC multiplexing mode is determined as follows: different sequence values ​​in the OCC sequence are respectively mapped to different symbols in the symbol group.

[0180] In combination with some embodiments of the second aspect, in some embodiments, different symbol groups transmitted by the same NPRACH use the same OCC multiplexing mode and the same OCC sequence.

[0181] In combination with some embodiments of the second aspect, in some embodiments, the first length satisfies the following condition: the total number of symbols in one NPRACH transmission is an integer multiple of the first length.

[0182] In conjunction with some embodiments of the second aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0183] Numbering symbols in the NPRACH transmission once to obtain a symbol index;

[0184] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0185] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol corresponding to the symbol index "x1", where x1 and j satisfy at least one of the following conditions:

[0186] First condition: j=x1 mod L; wherein L is the first length, and the mod function is a remainder function; the first condition is used to map one of the sequence values ​​to one symbol;

[0187] The second condition: j=floor(x1 / M1) mod L; wherein the second condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbols; the M1 indicates the number of symbols to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

[0188] In combination with some embodiments of the second aspect, in some embodiments, the M1 satisfies the following conditions: the product of the M1, L, and K1 is equal to the total number of symbols in one NPRACH transmission; wherein, the K1 indicates the number of repeated mappings of the OCC sequence in one NPRACH transmission.

[0189] In combination with some embodiments of the second aspect, in some embodiments, different repeated transmissions of the same NPRACH use the same OCC multiplexing mode and the same OCC sequence.

[0190] In combination with some embodiments of the second aspect, in some embodiments, the first length satisfies the following conditions: the total number of symbols in the N NPRACH transmissions is an integer multiple of the first length; and N is determined by the total number of repeated transmissions of the NPRACH.

[0191] In conjunction with some embodiments of the second aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0192] Numbering symbols in the N NPRACH transmissions to obtain symbol indexes;

[0193] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0194] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol corresponding to the symbol index "x2", where x2 and j satisfy at least one of the following conditions:

[0195] The third condition: j=x2 mod L; wherein L is the first length and the mod function is a remainder function; the third condition is used to map one of the sequence values ​​to one symbol;

[0196] The fourth condition: j=floor(x2 / M1) mod L; wherein the fourth condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbols; M1 indicates the number of symbols to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

[0197] In combination with some embodiments of the second aspect, in some embodiments, the M1 satisfies the following conditions: the product of the M1, L, and K2 is equal to the total number of symbols in the N NPRACH transmissions; wherein, the K2 indicates the number of repeated mappings of the OCC sequence in the N NPRACH transmissions.

[0198] In conjunction with some embodiments of the second aspect, in some embodiments, determining the first length based on the number of symbol groups of the NPRACH includes:

[0199] Determine the first length as a second value, where the second value is: the total number of symbol groups transmitted in one NPRACH transmission.

[0200] In conjunction with some embodiments of the second aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0201] The OCC multiplexing mode is determined as follows: different sequence values ​​in the OCC sequence are respectively mapped to symbols of different symbol groups.

[0202] In combination with some embodiments of the second aspect, in some embodiments, different repeated transmissions of the same NPRACH use the same OCC multiplexing mode and the same OCC sequence.

[0203] In combination with some embodiments of the second aspect, in some embodiments, the first length satisfies the following condition: the total number of symbol groups in one NPRACH transmission is an integer multiple of the first length.

[0204] In conjunction with some embodiments of the second aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0205] Numbering a symbol group in the NPRACH transmission to obtain a symbol group index;

[0206] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0207] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol in the symbol group corresponding to the symbol group index "i1", where i1 and j satisfy at least one of the following conditions:

[0208] Fifth condition: j=i1 mod L; wherein L is the first length and the mod function is a remainder function; the fifth condition is used to map one of the sequence values ​​to one symbol group;

[0209] The sixth condition: j=floor(i1 / M2) mod L; wherein the sixth condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbol groups; M2 indicates the number of symbol groups to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

[0210] In combination with some embodiments of the second aspect, in some embodiments, the product of M2, L, and K3 is equal to the total number of symbol groups in one NPRACH transmission; wherein, K3 indicates the number of repeated mappings of the OCC sequence in one NPRACH transmission.

[0211] In combination with some embodiments of the second aspect, in some embodiments, different repeated transmissions of the same NPRACH use the same OCC multiplexing mode and the same OCC sequence.

[0212] In combination with some embodiments of the second aspect, in some embodiments, the first length satisfies the following conditions: the total number of symbol groups in the N NPRACH transmissions is an integer multiple of the first length; and N is determined by the total number of repeated transmissions of the NPRACH.

[0213] In conjunction with some embodiments of the second aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0214] Numbering the symbol groups in the N NPRACH transmissions to obtain a symbol group index;

[0215] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0216] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol in the symbol group corresponding to the symbol group index "i2", where i2 and j satisfy at least one of the following conditions:

[0217] Seventh condition: j=i2 mod L; wherein L is the first length, and the mod function is a remainder function; the seventh condition is used to map one of the sequence values ​​to one symbol group;

[0218] The eighth condition: j=floor(x2 / M2)mod L; wherein the eighth condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbol groups; M2 indicates the number of symbol groups to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

[0219] In combination with some embodiments of the second aspect, in some embodiments, the product of M2, L, and K4 is equal to the total number of symbol groups in the N NPRACH transmissions; wherein, K4 indicates the number of repeated mappings of the OCC sequence in the N NPRACH transmissions.

[0220] In combination with some embodiments of the second aspect, in some embodiments, the first length satisfies the following conditions: N is an integer multiple of the first length; and N is determined by the total number of repeated transmissions of the NPRACH.

[0221] In conjunction with some embodiments of the second aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0222] Numbering the number of repeated transmissions of the NPRACH to obtain a number index;

[0223] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0224] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol of the NPRACH transmission corresponding to the number index "f", where f and j satisfy at least one of the following conditions:

[0225] Ninth condition: j=f mod L; wherein L is the first length and the mod function is a remainder function; the ninth condition is used to map one sequence value to one NPRACH transmission;

[0226] The tenth condition: j = floor(f / M3) mod L; wherein the tenth condition is used to enable one sequence value to be continuously mapped to multiple NPRACH transmissions; M3 indicates the number of NPRACH transmissions to which one sequence value is continuously mapped, and the floor function is a floor function.

[0227] In combination with some embodiments of the second aspect, in some embodiments, the product of M3, L, and K5 is equal to N; wherein K5 indicates the number of repeated mappings of the OCC sequence in the N NPRACH transmissions.

[0228] In conjunction with some embodiments of the second aspect, in some embodiments, determining the OCC sequence corresponding to the NPRACH includes at least one of the following:

[0229] Determining the OCC sequence based on a protocol preset table;

[0230] Determine the OCC sequence based on a protocol preset sequence generation method;

[0231] The determined sequence length of the OCC sequence is the first length.

[0232] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0233] The OCC sequence is configured and / or indicated to the terminal.

[0234] In combination with some embodiments of the second aspect, in some embodiments, different CE levels of the NPRACH correspond to first lengths, respectively, and the first lengths corresponding to different CE levels are the same or different; and / or

[0235] The different formats of the NPRACH respectively correspond to a first length, and the first lengths corresponding to the different formats are the same or different; and / or

[0236] The NPRACHs with different numbers of repeated transmissions respectively correspond to first lengths, and the first lengths corresponding to the NPRACHs with different numbers of repeated transmissions are the same or different.

[0237] In combination with some embodiments of the second aspect, in some embodiments, the first length is greater than or equal to the number of multiplexed users.

[0238] In combination with some embodiments of the second aspect, in some embodiments, the OCC sequence is a cyclic shift sequence, and the first length is greater than the number of multiplexed users.

[0239] In conjunction with some embodiments of the second aspect, in some embodiments, OCC sequences corresponding to different terminals on the same resource are orthogonal; and / or

[0240] The mutual correlation between OCC sequences corresponding to different terminals on the same resource is less than a first threshold.

[0241] In combination with some embodiments of the second aspect, in some embodiments, each CP except the first CP in the N repeated transmissions of the NPRACH is mapped as a symbol to the sequence value of the OCC sequence.

[0242] In combination with some embodiments of the second aspect, in some embodiments, different coverage enhancement CE levels of the NPRACH correspond to OCC multiplexing modes, and the OCC multiplexing modes corresponding to different CE levels are the same or different; and / or

[0243] The different formats of the NPRACH respectively correspond to OCC multiplexing modes, and the OCC multiplexing modes corresponding to the different formats are the same or different; and / or

[0244] The NPRACHs with different repeated transmission times correspond to OCC multiplexing modes respectively, and the OCC multiplexing modes corresponding to the NPRACHs with different repeated transmission times are the same or different.

[0245] In a third aspect, an embodiment of the present disclosure provides a communication method for a communication system, wherein the communication system includes a terminal and a network device, and the method includes at least one of the following:

[0246] The terminal determines an OCC sequence corresponding to the NPRACH of the terminal;

[0247] The terminal determines an OCC multiplexing mode of the NPRACH;

[0248] The terminal sends the NPRACH based on the OCC sequence and the OCC multiplexing mode;

[0249] The network device determines an OCC sequence corresponding to the NPRACH;

[0250] The network device determines an OCC multiplexing mode of the NPRACH;

[0251] The network device receives the NPRACH based on the OCC sequence and the OCC multiplexing mode.

[0252] In a fourth aspect, an embodiment of the present disclosure provides a terminal, including:

[0253] a processing module, configured to determine an OCC sequence corresponding to the NPRACH of the terminal;

[0254] The processing module is further configured to determine an OCC multiplexing mode of the NPRACH;

[0255] A transceiver module is configured to send the NPRACH based on the OCC sequence and the OCC multiplexing mode.

[0256] In conjunction with some embodiments of the fourth aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0257] Determine a first length, where the first length is: a sequence length of an OCC sequence corresponding to the NPRACH;

[0258] Determine an OCC multiplexing mode of the NPRACH based on the first length.

[0259] In conjunction with some embodiments of the fourth aspect, in some embodiments, determining the first length includes at least one of the following:

[0260] Determining the first length based on a protocol preset;

[0261] determining the first length based on a configuration of the network device;

[0262] The first length is determined based on an indication from a network device.

[0263] In conjunction with some embodiments of the fourth aspect, in some embodiments, determining the first length includes:

[0264] The first length is determined based on the number of symbols symbol of the NPRACH.

[0265] In conjunction with some embodiments of the fourth aspect, in some embodiments, determining the first length based on the number of symbols of the NPRACH includes:

[0266] The first length is determined to be a first value, where the first value is: the total number of symbols in a symbol group of the NPRACH.

[0267] In conjunction with some embodiments of the fourth aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0268] The OCC multiplexing mode is determined as follows: different sequence values ​​in the OCC sequence are respectively mapped to different symbols in the symbol group.

[0269] In combination with some embodiments of the fourth aspect, in some embodiments, different symbol groups transmitted by the same NPRACH use the same OCC multiplexing mode and the same OCC sequence.

[0270] In combination with some embodiments of the fourth aspect, in some embodiments, the first length satisfies the following condition: the total number of symbols in one NPRACH transmission is an integer multiple of the first length.

[0271] In conjunction with some embodiments of the fourth aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0272] Numbering symbols in the NPRACH transmission once to obtain a symbol index;

[0273] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0274] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol corresponding to the symbol index "x1", where x1 and j satisfy at least one of the following conditions:

[0275] First condition: j=x1 mod L; wherein L is the first length, and the mod function is a remainder function; the first condition is used to map one of the sequence values ​​to one symbol;

[0276] The second condition: j=floor(x1 / M1) mod L; wherein the second condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbols; the M1 indicates the number of symbols to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

[0277] In conjunction with some embodiments of the fourth aspect, in some embodiments, M1 satisfies the following condition: the product of M1, L, and K1 is equal to the total number of symbols in one NPRACH transmission; wherein K1 indicates the number of repeated mappings of the OCC sequence in one NPRACH transmission;

[0278] The M1 and / or K1 are provided by at least one of the following methods:

[0279] Determining the M1 and / or K1 based on the network device configuration;

[0280] Determine the M1 and / or K1 based on the protocol preset;

[0281] Determine the M1 and / or K1 based on a first association relationship, where the first association relationship is: an association relationship between the number of symbol groups in one NPRACH transmission and the M1 and / or K1;

[0282] Determine the M1 and / or K1 based on a second association relationship, where the second association relationship is: an association relationship between the first length and the M1 and / or K1;

[0283] The M1 and / or K1 are determined based on a third association relationship, where the third association relationship is: an association relationship between the total number of symbols in a symbol group of the NPRACH and the M1 and / or K1.

[0284] In combination with some embodiments of the fourth aspect, in some embodiments, different repeated transmissions of the same NPRACH use the same OCC multiplexing mode and the same OCC sequence.

[0285] In combination with some embodiments of the fourth aspect, in some embodiments, the first length satisfies the following conditions: the total number of symbols in the N NPRACH transmissions is an integer multiple of the first length; and N is determined by the total number of repeated transmissions of the NPRACH.

[0286] In conjunction with some embodiments of the fourth aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0287] Numbering symbols in the N NPRACH transmissions to obtain symbol indexes;

[0288] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0289] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol corresponding to the symbol index "x2", where x2 and j satisfy at least one of the following conditions:

[0290] The third condition: j=x2 mod L; wherein L is the first length and the mod function is a remainder function; the third condition is used to map one of the sequence values ​​to one symbol;

[0291] The fourth condition: j=floor(x2 / M1) mod L; wherein the fourth condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbols; M1 indicates the number of symbols to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

[0292] In conjunction with some embodiments of the fourth aspect, in some embodiments, M1 satisfies the following condition: the product of M1, L, and K2 is equal to the total number of symbols in the N NPRACH transmissions; wherein K2 indicates the number of repeated mappings of the OCC sequence in the N NPRACH transmissions;

[0293] The M1 and / or K2 are in at least one of the following ways:

[0294] Determining the M1 and / or K2 based on the network device configuration;

[0295] Determine the M1 and / or K2 based on the protocol preset;

[0296] Determine the M1 and / or K2 based on a fourth association relationship, where the fourth association relationship is: an association relationship between the number of symbol groups in one NPRACH transmission and the M1 and / or K2;

[0297] Determine the M1 and / or K2 based on a fifth association relationship, where the fifth association relationship is: an association relationship between the first length and the M1 and / or K2;

[0298] Determine the M1 and / or K2 based on a sixth association relationship, where the sixth association relationship is: an association relationship between the number of symbol groups in the N NPRACH transmissions and the M1 and / or K2;

[0299] Determine the M1 and / or K2 based on a seventh association relationship, where the seventh association relationship is: an association relationship between a total number of symbols in the N NPRACH transmissions and the M1 and / or K2;

[0300] The M1 and / or K2 are determined based on an eighth association relationship, where the eighth association relationship is: an association relationship between N and the M1 and / or K2.

[0301] In conjunction with some embodiments of the fourth aspect, in some embodiments, determining the first length includes:

[0302] The first length is determined based on the number of symbol groups of the NPRACH.

[0303] In conjunction with some embodiments of the fourth aspect, in some embodiments, determining the first length based on the number of symbol groups of the NPRACH includes:

[0304] Determine the first length as a second value, where the second value is: the total number of symbol groups transmitted in one NPRACH transmission.

[0305] In conjunction with some embodiments of the fourth aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0306] The OCC multiplexing mode is determined as follows: different sequence values ​​in the OCC sequence are respectively mapped to symbols of different symbol groups.

[0307] In combination with some embodiments of the fourth aspect, in some embodiments, different repeated transmissions of the same NPRACH use the same OCC multiplexing mode and the same OCC sequence.

[0308] In combination with some embodiments of the fourth aspect, in some embodiments, the first length satisfies the following condition: the total number of symbol groups in one NPRACH transmission is an integer multiple of the first length.

[0309] In conjunction with some embodiments of the fourth aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0310] Numbering a symbol group in the NPRACH transmission to obtain a symbol group index;

[0311] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0312] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol in the symbol group corresponding to the symbol group index "i1", where i1 and j satisfy at least one of the following conditions:

[0313] Fifth condition: j=i1 mod L; wherein L is the first length and the mod function is a remainder function; the fifth condition is used to map one of the sequence values ​​to one symbol group;

[0314] The sixth condition: j=floor(i1 / M2) mod L; wherein the sixth condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbol groups; M2 indicates the number of symbol groups to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

[0315] In conjunction with some embodiments of the fourth aspect, in some embodiments, the product of M2, L, and K3 is equal to the total number of symbol groups in one NPRACH transmission; wherein K3 indicates the number of repeated mappings of the OCC sequence in one NPRACH transmission;

[0316] The M2 and / or K3 are in at least one of the following ways:

[0317] Determining the M2 and / or K3 based on the network device configuration;

[0318] The M2 and / or K3 are determined based on protocol presets.

[0319] In combination with some embodiments of the fourth aspect, in some embodiments, different repeated transmissions of the same NPRACH use the same OCC multiplexing mode and the same OCC sequence.

[0320] In combination with some embodiments of the fourth aspect, in some embodiments, the first length satisfies the following conditions: the total number of symbol groups in the N NPRACH transmissions is an integer multiple of the first length; and N is determined by the total number of repeated transmissions of the NPRACH.

[0321] In conjunction with some embodiments of the fourth aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0322] Numbering the symbol groups in the N NPRACH transmissions to obtain a symbol group index;

[0323] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0324] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol in the symbol group corresponding to the symbol group index "i2", where i2 and j satisfy at least one of the following conditions:

[0325] Seventh condition: j=i2 mod L; wherein L is the first length, and the mod function is a remainder function; the seventh condition is used to map one of the sequence values ​​to one symbol group;

[0326] The eighth condition: j=floor(x2 / M2)mod L; wherein the eighth condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbol groups; M2 indicates the number of symbol groups to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

[0327] In conjunction with some embodiments of the fourth aspect, in some embodiments, the product of M2, L, and K4 is equal to the total number of symbol groups in the N NPRACH transmissions; wherein K4 indicates the number of repeated mappings of the OCC sequence in the N NPRACH transmissions;

[0328] The M2 and / or K4 are provided by at least one of the following methods:

[0329] Determining the M2 and / or K4 based on the network device configuration;

[0330] The M2 and / or K4 are determined based on protocol presets.

[0331] In conjunction with some embodiments of the fourth aspect, in some embodiments, determining the first length includes:

[0332] The first length is determined based on the number of repeated transmissions of the NPRACH.

[0333] In combination with some embodiments of the fourth aspect, in some embodiments, the first length satisfies the following conditions: N is an integer multiple of the first length; and N is determined by the total number of repeated transmissions of the NPRACH.

[0334] In conjunction with some embodiments of the fourth aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0335] Numbering the number of repeated transmissions of the NPRACH to obtain a number index;

[0336] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0337] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol of the NPRACH transmission corresponding to the number index "f", where f and j satisfy at least one of the following conditions:

[0338] Ninth condition: j=f mod L; wherein L is the first length and the mod function is a remainder function; the ninth condition is used to map one sequence value to one NPRACH transmission;

[0339] The tenth condition: j = floor(f / M3) mod L; wherein the tenth condition is used to enable one sequence value to be continuously mapped to multiple NPRACH transmissions; M3 indicates the number of NPRACH transmissions to which one sequence value is continuously mapped, and the floor function is a floor function.

[0340] In conjunction with some embodiments of the fourth aspect, in some embodiments, the product of M3, L, and K5 is equal to N; wherein K5 indicates the number of repeated mappings of the OCC sequence in the N NPRACH transmissions;

[0341] The M3 and / or K5 are provided by at least one of the following methods:

[0342] Determining the M3 and / or K5 based on the network device configuration;

[0343] The M3 and / or K5 are determined based on protocol presets.

[0344] In conjunction with some embodiments of the fourth aspect, in some embodiments, determining the OCC sequence corresponding to the NPRACH includes at least one of the following:

[0345] Determining the OCC sequence based on a protocol preset table;

[0346] Determining the OCC sequence based on a configuration of a network device;

[0347] Determining the OCC sequence based on an indication from a network device;

[0348] Determine the OCC sequence based on a protocol preset sequence generation method;

[0349] The determined sequence length of the OCC sequence is the first length.

[0350] In combination with some embodiments of the fourth aspect, in some embodiments, different coverage enhancement CE levels of the NPRACH correspond to first lengths respectively, and the first lengths corresponding to different CE levels are the same or different; and / or

[0351] The different formats of the NPRACH respectively correspond to a first length, and the first lengths corresponding to the different formats are the same or different; and / or

[0352] The NPRACHs with different numbers of repeated transmissions respectively correspond to first lengths, and the first lengths corresponding to the NPRACHs with different numbers of repeated transmissions are the same or different.

[0353] In combination with some embodiments of the fourth aspect, in some embodiments, the first length is greater than or equal to the number of multiplexed users.

[0354] In combination with some embodiments of the fourth aspect, in some embodiments, the OCC sequence is a cyclic shift sequence, and the first length is greater than the number of multiplexed users.

[0355] In conjunction with some embodiments of the fourth aspect, in some embodiments, OCC sequences corresponding to different terminals on the same resource are orthogonal; and / or

[0356] The mutual correlation between OCC sequences corresponding to different terminals on the same resource is less than a first threshold.

[0357] In combination with some embodiments of the fourth aspect, in some embodiments, each CP except the first cyclic prefix CP in the N repeated transmissions of the NPRACH is mapped as a symbol to the sequence value of the OCC sequence.

[0358] In combination with some embodiments of the fourth aspect, in some embodiments, different coverage enhancement CE levels of the NPRACH correspond to OCC multiplexing modes, and the OCC multiplexing modes corresponding to different CE levels are the same or different; and / or

[0359] The different formats of the NPRACH respectively correspond to OCC multiplexing modes, and the OCC multiplexing modes corresponding to the different formats are the same or different; and / or

[0360] The NPRACHs with different repeated transmission times correspond to OCC multiplexing modes respectively, and the OCC multiplexing modes corresponding to the NPRACHs with different repeated transmission times are the same or different.

[0361] In a fifth aspect, an embodiment of the present disclosure provides a network device, including:

[0362] A processing module, configured to determine an OCC sequence corresponding to the NPRACH of the terminal;

[0363] The processing module is further configured to determine an OCC multiplexing mode of the NPRACH;

[0364] A transceiver module is configured to receive the NPRACH based on the OCC sequence and the OCC multiplexing mode.

[0365] In conjunction with some embodiments of the fifth aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0366] Determine a first length, where the first length is: a sequence length of an OCC sequence corresponding to the NPRACH;

[0367] Determine an OCC multiplexing mode of the NPRACH based on the first length.

[0368] With reference to some embodiments of the fifth aspect, in some embodiments, determining the first length includes:

[0369] The first length is determined based on protocol presets and / or autonomously by the network device.

[0370] With reference to some embodiments of the fifth aspect, in some embodiments, determining the first length includes:

[0371] The first length is determined based on protocol presets and / or autonomously by the network device.

[0372] In conjunction with some embodiments of the fifth aspect, in some embodiments, the method further includes:

[0373] The first length is configured for the terminal.

[0374] In combination with some embodiments of the fifth aspect, in some embodiments, the first length is a first value, and the first value is: the total number of symbols in a symbol group of the NPRACH.

[0375] In conjunction with some embodiments of the fifth aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0376] The OCC multiplexing mode is determined as follows: different sequence values ​​in the OCC sequence are respectively mapped to different symbols in the symbol group.

[0377] In combination with some embodiments of the fifth aspect, in some embodiments, different symbol groups transmitted by the same NPRACH use the same OCC multiplexing mode and the same OCC sequence.

[0378] In combination with some embodiments of the fifth aspect, in some embodiments, the first length satisfies the following condition: the total number of symbols in one NPRACH transmission is an integer multiple of the first length.

[0379] In conjunction with some embodiments of the fifth aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0380] Numbering symbols in the NPRACH transmission once to obtain a symbol index;

[0381] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0382] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol corresponding to the symbol index "x1", where x1 and j satisfy at least one of the following conditions:

[0383] First condition: j=x1 mod L; wherein L is the first length, and the mod function is a remainder function; the first condition is used to map one of the sequence values ​​to one symbol;

[0384] The second condition: j=floor(x1 / M1) mod L; wherein the second condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbols; the M1 indicates the number of symbols to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

[0385] In combination with some embodiments of the fifth aspect, in some embodiments, the M1 satisfies the following conditions: the product of the M1, L, and K1 is equal to the total number of symbols in one NPRACH transmission; wherein, the K1 indicates the number of repeated mappings of the OCC sequence in one NPRACH transmission.

[0386] In combination with some embodiments of the fifth aspect, in some embodiments, different repeated transmissions of the same NPRACH use the same OCC multiplexing mode and the same OCC sequence.

[0387] In combination with some embodiments of the fifth aspect, in some embodiments, the first length satisfies the following conditions: the total number of symbols in the N NPRACH transmissions is an integer multiple of the first length; and N is determined by the total number of repeated transmissions of the NPRACH.

[0388] In conjunction with some embodiments of the fifth aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0389] Numbering symbols in the N NPRACH transmissions to obtain symbol indexes;

[0390] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0391] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol corresponding to the symbol index "x2", where x2 and j satisfy at least one of the following conditions:

[0392] The third condition: j=x2 mod L; wherein L is the first length and the mod function is a remainder function; the third condition is used to map one of the sequence values ​​to one symbol;

[0393] The fourth condition: j=floor(x2 / M1) mod L; wherein the fourth condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbols; M1 indicates the number of symbols to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

[0394] In combination with some embodiments of the fifth aspect, in some embodiments, the M1 satisfies the following conditions: the product of the M1, L, and K2 is equal to the total number of symbols in the N NPRACH transmissions; wherein, the K2 indicates the number of repeated mappings of the OCC sequence in the N NPRACH transmissions.

[0395] In conjunction with some embodiments of the fifth aspect, in some embodiments, determining the first length based on the number of symbol groups of the NPRACH includes:

[0396] Determine the first length as a second value, where the second value is: the total number of symbol groups transmitted in one NPRACH transmission.

[0397] In conjunction with some embodiments of the fifth aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0398] The OCC multiplexing mode is determined as follows: different sequence values ​​in the OCC sequence are respectively mapped to symbols of different symbol groups.

[0399] In combination with some embodiments of the fifth aspect, in some embodiments, different repeated transmissions of the same NPRACH use the same OCC multiplexing mode and the same OCC sequence.

[0400] In combination with some embodiments of the fifth aspect, in some embodiments, the first length satisfies the following condition: the total number of symbol groups in one NPRACH transmission is an integer multiple of the first length.

[0401] In conjunction with some embodiments of the fifth aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0402] Numbering a symbol group in the NPRACH transmission to obtain a symbol group index;

[0403] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0404] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol in the symbol group corresponding to the symbol group index "i1", where i1 and j satisfy at least one of the following conditions:

[0405] Fifth condition: j=i1 mod L; wherein L is the first length and the mod function is a remainder function; the fifth condition is used to map one of the sequence values ​​to one symbol group;

[0406] The sixth condition: j=floor(i1 / M2) mod L; wherein the sixth condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbol groups; M2 indicates the number of symbol groups to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

[0407] In combination with some embodiments of the fifth aspect, in some embodiments, the product of M2, L, and K3 is equal to the total number of symbol groups in one NPRACH transmission; wherein, K3 indicates the number of repeated mappings of the OCC sequence in one NPRACH transmission.

[0408] In combination with some embodiments of the fifth aspect, in some embodiments, different repeated transmissions of the same NPRACH use the same OCC multiplexing mode and the same OCC sequence.

[0409] In combination with some embodiments of the fifth aspect, in some embodiments, the first length satisfies the following conditions: the total number of symbol groups in the N NPRACH transmissions is an integer multiple of the first length; and N is determined by the total number of repeated transmissions of the NPRACH.

[0410] In conjunction with some embodiments of the fifth aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0411] Numbering the symbol groups in the N NPRACH transmissions to obtain a symbol group index;

[0412] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0413] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol in the symbol group corresponding to the symbol group index "i2", where i2 and j satisfy at least one of the following conditions:

[0414] Seventh condition: j=i2 mod L; wherein L is the first length, and the mod function is a remainder function; the seventh condition is used to map one of the sequence values ​​to one symbol group;

[0415] The eighth condition: j=floor(x2 / M2)mod L; wherein the eighth condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbol groups; M2 indicates the number of symbol groups to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

[0416] In combination with some embodiments of the fifth aspect, in some embodiments, the product of M2, L, and K4 is equal to the total number of symbol groups in the N NPRACH transmissions; wherein, K4 indicates the number of repeated mappings of the OCC sequence in the N NPRACH transmissions.

[0417] In combination with some embodiments of the fifth aspect, in some embodiments, the first length satisfies the following conditions: N is an integer multiple of the first length; and N is determined by the total number of repeated transmissions of the NPRACH.

[0418] In conjunction with some embodiments of the fifth aspect, in some embodiments, determining the OCC multiplexing mode of the NPRACH includes:

[0419] Numbering the number of repeated transmissions of the NPRACH to obtain a number index;

[0420] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0421] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol of the NPRACH transmission corresponding to the number index "f", where f and j satisfy at least one of the following conditions:

[0422] Ninth condition: j=f mod L; wherein L is the first length and the mod function is a remainder function; the ninth condition is used to map one sequence value to one NPRACH transmission;

[0423] The tenth condition: j = floor(f / M3) mod L; wherein the tenth condition is used to enable one sequence value to be continuously mapped to multiple NPRACH transmissions; M3 indicates the number of NPRACH transmissions to which one sequence value is continuously mapped, and the floor function is a floor function.

[0424] In combination with some embodiments of the fifth aspect, in some embodiments, the product of M3, L, and K5 is equal to N; wherein K5 indicates the number of repeated mappings of the OCC sequence in the N NPRACH transmissions.

[0425] In conjunction with some embodiments of the fifth aspect, in some embodiments, determining the OCC sequence corresponding to the NPRACH includes at least one of the following:

[0426] Determining the OCC sequence based on a protocol preset table;

[0427] Determine the OCC sequence based on a protocol preset sequence generation method;

[0428] The determined sequence length of the OCC sequence is the first length.

[0429] In conjunction with some embodiments of the fifth aspect, in some embodiments, the method further includes:

[0430] The OCC sequence is configured and / or indicated to the terminal.

[0431] In combination with some embodiments of the fifth aspect, in some embodiments, different CE levels of the NPRACH correspond to first lengths, respectively, and the first lengths corresponding to different CE levels are the same or different; and / or

[0432] The different formats of the NPRACH respectively correspond to a first length, and the first lengths corresponding to the different formats are the same or different; and / or

[0433] The NPRACHs with different numbers of repeated transmissions respectively correspond to first lengths, and the first lengths corresponding to the NPRACHs with different numbers of repeated transmissions are the same or different.

[0434] In combination with some embodiments of the fifth aspect, in some embodiments, the first length is greater than or equal to the number of multiplexed users.

[0435] In combination with some embodiments of the fifth aspect, in some embodiments, the OCC sequence is a cyclic shift sequence, and the first length is greater than the number of multiplexed users.

[0436] In conjunction with some embodiments of the fifth aspect, in some embodiments, OCC sequences corresponding to different terminals on the same resource are orthogonal; and / or

[0437] The mutual correlation between OCC sequences corresponding to different terminals on the same resource is less than a first threshold.

[0438] In combination with some embodiments of the fifth aspect, in some embodiments, each CP except the first CP in the N repeated transmissions of the NPRACH is mapped as a symbol to the sequence value of the OCC sequence.

[0439] In conjunction with some embodiments of the fifth aspect, in some embodiments, different coverage enhancement CE levels of the NPRACH correspond to OCC multiplexing modes, and the OCC multiplexing modes corresponding to different CE levels are the same or different; and / or

[0440] The different formats of the NPRACH respectively correspond to OCC multiplexing modes, and the OCC multiplexing modes corresponding to the different formats are the same or different; and / or

[0441] The NPRACHs with different repeated transmission times correspond to OCC multiplexing modes respectively, and the OCC multiplexing modes corresponding to the NPRACHs with different repeated transmission times are the same or different.

[0442] In a sixth aspect, an embodiment of the present disclosure proposes a communication device, which includes: one or more processors; one or more memories for storing instructions; wherein the processor is used to call the instructions so that the communication device executes the communication method described in the first aspect, the optional implementation of the first aspect, the second aspect, and the optional implementation of the second aspect.

[0443] In the seventh aspect, an embodiment of the present disclosure proposes a communication system, which includes: a terminal and a network device; wherein the terminal is configured to execute the method described in the first aspect and the optional implementation of the first aspect, and the network device is configured to execute the method described in the second aspect and the optional implementation of the second aspect.

[0444] In an eighth aspect, an embodiment of the present disclosure proposes a storage medium, which stores instructions. When the instructions are executed on a communication device, the communication device executes the communication method described in the first aspect, the optional implementation of the first aspect, the second aspect, and the optional implementation of the second aspect.

[0445] In the ninth aspect, an embodiment of the present disclosure proposes a program product. When the program product is executed by a communication device, the communication device executes the communication method described in the first aspect, the optional implementation of the first aspect, the second aspect, and the optional implementation of the second aspect.

[0446] In a tenth aspect, an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the communication method described in the first aspect, the optional implementation of the first aspect, the second aspect, and the optional implementation of the second aspect.

[0447] It is understandable that the above-mentioned terminals, network devices, communication devices, communication systems, storage media, program products, and computer programs are all used to execute the methods proposed in the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding methods and will not be repeated here.

[0448] The present disclosure provides invention titles. In some embodiments, the terms "communication method" and "information processing method," "information sending method," and "information receiving method" are interchangeable; the terms "communication device" and "information processing device," "information sending device," and "information receiving device" are interchangeable; and the terms "information processing system," "communication system," "information sending system," and "information receiving system" are interchangeable.

[0449] The embodiments of the present disclosure are not exhaustive and are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0450] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0451] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0452] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "above", "said", "the", "the", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun following the article may be understood as a singular expression or a plural expression.

[0453] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0454] In some embodiments, the terms "at least one of", "at least one of", "at least one of", "one or more", "a plurality of", "multiple", etc. can be used interchangeably.

[0455] In the embodiments of the present disclosure, descriptions such as “at least one of A, B, C…”, “A and / or B and / or C…”, etc. include the situation where any one of A, B, C… exists alone, and also include any combination of any multiple of A, B, C…, and each situation can exist alone; for example, “at least one of A, B, C” includes the situation where A exists alone, B exists alone, C exists alone, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B, and C; for example, A and / or B includes the situation where A exists alone, B exists alone, and the combination of A and B.

[0456] In some embodiments, descriptions such as "in one case A, in another case B," or "in response to one case A, in response to another case B," may include the following technical solutions depending on the situation: executing A independently of B (in some embodiments, A); executing B independently of A (in some embodiments, B); selectively executing A and B (in some embodiments, selecting between A and B); and executing both A and B (in some embodiments, A and B). The same applies when there are more branches, such as A, B, and C.

[0457] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for another example, if the description object is "information", then the "first information" and the "second information" can be the same information or different information, and their contents can be the same or different.

[0458] In some embodiments, “including A,” “comprising A,” “used to indicate A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0459] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0460] In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not less than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "not more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0461] In some embodiments, devices, etc. can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as "device", "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", and "subject" can be used interchangeably.

[0462] In some embodiments, "network" can be interpreted as devices included in the network (eg, access network equipment, core network equipment, etc.).

[0463] In some embodiments, the terms "access network device (AN device)", "radio access network device (RAN device)", "base station (BS)", "radio base station" "fixed station", "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)", "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "carrier", "component carrier", "bandwidth part (BWP)" and the like may be used interchangeably.

[0464] In some embodiments, the terms "terminal", "terminal device", "user equipment (UE)", "user terminal", "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, etc. can be used interchangeably.

[0465] In some embodiments, the access network device, the core network device, or the network device can be replaced by a terminal. For example, the various embodiments of the present disclosure can also be applied to a structure in which the communication between the access network device, the core network device, or the network device and the terminal is replaced by communication between multiple terminals (for example, it can also be called device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it can also be set as a structure in which the terminal has all or part of the functions of the access network device. In addition, language such as "uplink" and "downlink" can also be replaced by language corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. can be replaced by side channels, and uplinks, downlinks, etc. can be replaced by side links.

[0466] In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, the core network device, or the network device may have a structure that has all or part of the functions of the terminal.

[0467] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0468] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0469] In addition, each element, each row, or each column in the table of the embodiment of the present disclosure can be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns can also be implemented as an independent embodiment.

[0470] The correspondences shown in the tables of the present disclosure can be configured or predefined. The values ​​of the information in each table are merely examples and can be configured to other values, which are not limited by the present disclosure. When configuring the correspondences between information and parameters, it is not necessarily required to configure all the correspondences shown in each table. For example, in the tables of the present disclosure, the correspondences shown in certain rows may not be configured. For another example, appropriate deformation adjustments can be made based on the above tables, such as splitting, merging, etc. The names of the parameters shown in the titles of the above tables may also adopt other names that can be understood by the communication device, and the values ​​or representations of the parameters may also adopt other values ​​or representations that can be understood by the communication device. When implementing the above tables, other data structures may also be used, such as arrays, queues, containers, stacks, linear lists, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables or hash tables, etc.

[0471] The predefined in the present disclosure may be understood as defined, predefined, stored, pre-stored, pre-negotiated, pre-configured, solidified, or pre-burned.

[0472] Figure 1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure. As shown in Figure 1, the communication system 100 may include a terminal and a network device. Optionally, the network device may include at least one of an access network device and a core network device.

[0473] In some embodiments, the terminal includes, for example, a mobile phone, a wearable device, an Internet of Things device, a narrowband Internet of Things (NB-IOT) device, a car with communication function, a smart car, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but is not limited thereto.

[0474] In some embodiments, the access network device is, for example, a node or device that accesses a terminal to a wireless network. The access network device may include an evolved NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved nodeB (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a wireless fidelity (WiFi) system, but is not limited thereto.

[0475] In some embodiments, the technical solution of the present disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within the access network devices involved in the embodiments of the present disclosure can be transformed into internal interfaces of the Open RAN, and the processes and information interactions between these internal interfaces can be implemented through software or programs.

[0476] In some embodiments, the access network device can be composed of a centralized unit (CU) and a distributed unit (DU), where the CU can also be called a control unit. The CU-DU structure can be used to split the protocol layer of the access network device, with the functions of some protocol layers centrally controlled by the CU, and the functions of the remaining part or all of the protocol layers distributed in the DU, which is centrally controlled by the CU, but is not limited to this.

[0477] In some embodiments, the core network device may be a device including one or more network elements, or may be multiple devices or a group of devices, each including all or part of one or more network elements. The network element may be virtual or physical. The core network includes, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC). Alternatively, the core network device may also be a location management function network element. Exemplarily, the location management function network element includes a location server (location server), which may be implemented as any one of the following: Location Management Function (LMF), Enhanced Serving Mobile Location Centre (ESMC), or a 5G Core Network (5GCN).

[0478] E-SMLC), Secure User Plane Location (SUPL) and Secure User Plane Location Platform (SUPLLP).

[0479] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.

[0480] The following embodiments of the present disclosure may be applied to the communication system 100 shown in Figure 1, or a portion thereof, but are not limited thereto. The entities shown in Figure 1 are illustrative only. The communication system may include all or part of the entities shown in Figure 1, or may include other entities outside of Figure 1. The number and form of the entities may be arbitrary. The connection relationship between the entities is illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0481] The embodiments of the present disclosure can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), future radio access (FRA), new radio access technology (RAT), new radio (NR), new radio access (NX), future generation radio access (FX), Global System for Mobile Communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X), systems utilizing other communication methods, and next-generation systems based on and extending these methods. Furthermore, multiple systems may be combined (for example, a combination of LTE or LTE-A with 5G).

[0482] FIG2A is an interactive diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG2A , the embodiment of the present disclosure relates to a communication method for use in a communication system 100, the method comprising:

[0483] Step 2101: The network device determines an OCC sequence (OCC Sequence).

[0484] Optionally, the OCC sequence may be an OCC sequence corresponding to the NPRACH of the terminal, and the NPRACHs of different terminals correspond to different OCC sequences. The network device may determine the OCC sequences corresponding to the NPRACHs of at least one terminal. Optionally, the OCC sequence may be used to implement multiplexing and sending of NPRACHs by multiple terminals on the same time-frequency resources. For example, when different terminals send NPRACHs, the OCC sequence corresponding to the NPRACH of the terminal may be used to perform weighted processing on the NPRACH of the terminal, and each terminal may send its own weighted NPRACH to the network device on the same time-frequency resources. Furthermore, when the network device receives the weighted NPRACHs sent by each terminal on the same time-frequency resource, it may determine the NPRACH of each terminal based on the OCC sequences corresponding to the NPRACHs of each terminal, thereby implementing multiplexing and sending of NPRACHs by multiple terminals on the same time-frequency resources.

[0485] In some embodiments, the sequence length (OCC length) of the OCC sequence may be greater than or equal to the number of multiplexed users. The sequence length may be used to represent the number of sequence values ​​in the OCC sequence. For example, when the OCC sequence includes 5 sequence values, the sequence length of the OCC sequence is 5. Furthermore, the "number of multiplexed users" may be understood as, for example, the number of terminals that transmit NPRACH multiplexing using the same time-frequency resources. In some embodiments, the "number of multiplexed users" may also be referred to as the "number of OCC multiplexed users" or the "maximum number of OCC multiplexed users," etc., which is not specifically limited in this disclosure.

[0486] In some embodiments, the OCC sequence may be any one of the following sequences: a Walsh sequence, a Hamdard sequence, a PN sequence, a gold sequence, a cyclic shift sequence, a Zadoff-Chu sequence, etc. Optionally, the following description takes the OCC sequence as an example of a cyclic shift sequence.

[0487] In some embodiments, when the OCC sequence is a cyclically shifted sequence, one of the OCC sequences may be first determined as a base sequence, and then cyclically shifted based on the base sequence to obtain A-1 sequences, where A is a positive integer, and the A OCC sequences are mutually orthogonal.

[0488] For example, it is assumed that the OCC sequence corresponding to one of the terminals is determined to be sequence#0=[s(0),s(1),s(2),…s(k)], k=0,…,L-1; wherein L can be used to represent the sequence length of sequence#0, s(k)=exp(j*2pi*k / L), wherein j is a complex number identifier and pi is π. In addition, based on sequence#0, a cyclic shift can be performed to obtain the OCC sequence sequence#i corresponding to other terminals, i is used to represent the OCC sequence corresponding to the i-th terminal, wherein for the k-th value of sequence#i, s(k)=s((k+i)modL), and the mod function is a remainder function. It should be noted that this is only an exemplary description, and the specific expression form or expression formula is not limited. Other expressions of the OCC cyclic shift sequence based on the same principle should also be included in the scope of the present invention.

[0489] In some embodiments, the cyclic shift (Cv) value of the OCC sequence may be greater than or equal to 1. The Cv value may be agreed upon by the protocol or configured by the network device. When the Cv value is greater than 1, the length of the OCC sequence may be greater than the number of multiplexed users. Therefore, when the OCC sequence for each terminal is calculated based on the Cv value, the OCC sequences of different terminals are ensured to be different and orthogonal, thereby enhancing the performance of NPRACH multiplexing transmission.

[0490] Optionally, the above OCC sequence may be determined by the network device based on a protocol agreement, and / or, the above OCC sequence may be determined autonomously by the network device.

[0491] Step 2102: The network device sends first information, where the first information is used to determine an OCC sequence.

[0492] Optionally, the network device may send the first information to the terminal, the terminal may receive the first information, and the first information may be used to determine an OCC sequence corresponding to the NPRACH of the terminal.

[0493] In some embodiments, the first information can be used to indicate the sequence index corresponding to the OCC sequence of the terminal NPRACH. Specifically, the network device can determine the sequence index corresponding to the OCC sequence of the terminal NPRACH based on the protocol preset table, and then send the first information to the terminal to indicate the sequence index. After receiving the first information, the terminal can query the protocol preset table based on the sequence index indicated by the first information to determine the corresponding OCC sequence. Optionally, the protocol preset table can be an existing table or a newly added table, wherein Figures 2B-2D are schematic diagrams of the protocol preset table shown according to an embodiment of the present disclosure. Optionally, the sequence value in the OCC sequence can be represented by W(j) in the protocol preset table, j=0,…,L-1; L can be used to represent the sequence length (OCC length) of the OCC sequence, and the OCC sequences in different protocol preset tables correspond to different sequence lengths. As shown in Figure 2B, the sequence length corresponding to the OCC sequence in Figure 2B is 2, the sequence index corresponding to the OCC sequence [1,1] in Figure 2B is "0", and the sequence index corresponding to the OCC sequence [1,-1] is "1".

[0494] Optionally, in some other embodiments, the first information may indicate at least one of a sequence length and a Cv value of the OCC sequence. The Cv value may be used to determine the sequence length of the OCC sequence. And, after receiving the first information, the terminal may determine the sequence length of the OCC sequence based on the first information, and then determine the corresponding protocol preset table based on the sequence length of the OCC sequence, and determine the OCC sequence in the corresponding protocol preset table. Optionally, the terminal may determine the OCC sequence in the corresponding protocol preset table in a protocol preset manner, or the terminal may determine the OCC sequence in the corresponding protocol preset table by itself. For example, the terminal may determine the first OCC sequence in the protocol preset table as the OCC sequence corresponding to the NPRACH of the terminal in a protocol preset manner.

[0495] Optionally, in some embodiments, the OCC sequences corresponding to different terminals on the same resource are orthogonal; and / or the mutual correlation between the OCC sequences corresponding to different terminals on the same resource is less than a first threshold.

[0496] Step 2103: The terminal determines the OCC sequence.

[0497] Optionally, the method for the terminal to determine the OCC sequence may include at least one of the following:

[0498] Method 1: Determine the OCC sequence based on the protocol preset table;

[0499] Method 2: Determine the OCC sequence based on the configuration of the network device;

[0500] Method 3: Determine the OCC sequence based on the indication of the network device;

[0501] Method 4: Determine the OCC sequence based on a protocol-preset sequence generation method, which may include, for example, a cyclic shift sequence generation method, a Walsh sequence generation method, a PN sequence generation method, a Hamdard sequence generation method, a Zadoff-Chu sequence generation method, or a gold sequence generation method.

[0502] Optionally, in some embodiments, a terminal may receive first information sent by a network device. When the first information indicates a sequence index corresponding to an OCC sequence, the terminal may directly determine the OCC sequence corresponding to the terminal based on the first information. In this case, the terminal is considered to have determined the OCC sequence using the above-mentioned method 2 or method 3. Alternatively, when the first information indicates at least one of the sequence length and the Cv value of the OCC sequence, the terminal may determine the sequence length of the OCC sequence based on the first information, and then determine the OCC sequence corresponding to the terminal using the above-mentioned method 1 or method 4 based on the sequence length of the OCC sequence. Regarding the method for the terminal to determine the OCC sequence corresponding to the terminal based on the sequence length of the OCC sequence using the above-mentioned method 1, please refer to the above-mentioned content and will not be repeated here. Furthermore, the method for the terminal to determine the OCC sequence corresponding to the terminal based on the sequence length of the OCC sequence using the above-mentioned method 4 may include, for example, selecting a target sequence generation method from a protocol preset sequence generation method, wherein the sequence length of the OCC sequence generated by the target sequence generation method is the sequence length indicated by the first information. Thereafter, the terminal may generate the OCC sequence based on the target sequence generation method.

[0503] In addition, in some other embodiments, the network device may not need to send the first information, and the terminal may directly determine the OCC sequence corresponding to the terminal based on the protocol pre-definition.

[0504] Step 2104: The terminal determines the OCC multiplexing mode of NPRACH.

[0505] Optionally, in some embodiments, the OCC multiplexing mode of NPRACH may be a time domain multiplexing mode.

[0506] The following describes in detail how the terminal determines the OCC multiplexing mode of the NPRACH.

[0507] In some embodiments, a terminal may first determine a first length and, based on the first length, determine an OCC multiplexing mode for the terminal's NPRACH. Different first lengths correspond to different OCC multiplexing modes. Optionally, the first length may be the length of an OCC sequence. Optionally, the first length may be determined by the terminal based on a protocol preset; or, the first length may be determined by the terminal based on a configuration of a network device; or, the first length may be determined by the terminal based on an instruction from the network device. Optionally, the method for determining the first length may include at least one of the following.

[0508] The first method is to determine the first length based on the number of NPRACH symbols, that is, the basic unit of the first length is one NPRACH time domain symbol.

[0509] In some embodiments, the first length may be a first value, and the first value may be: the total number of symbols in a symbol group of NPRACH.

[0510] In some other embodiments, when the first length is determined based on the number of NPRACH symbols, the first length may satisfy the following condition: the total number of symbols in a single NPRACH transmission is an integer multiple of the first length, that is, Mod(G×H,L)=0, where G represents the number of symbol groups per single NPRACH transmission, H represents the number of symbols per symbol group, and L represents the first length.

[0511] In some further embodiments, when determining the first length based on the number of NPRACH symbols, the first length may satisfy the following condition: the total number of symbols in N NPRACH transmissions is an integer multiple of the first length. That is, Mod(N×G×H,L)=0. N is determined by the total number of NPRACH repetitions. For example, N may be the total number of NPRACH repetitions, or N may be calculated based on the total number of NPRACH repetitions. For example, N may be equal to one-half of the total number of NPRACH repetitions, or equal to one-quarter of the total number of NPRACH repetitions.

[0512] The second method is to determine the first length based on the number of symbol groups of NPRACH, that is, the basic unit of the first length is one symbolgroup.

[0513] In some embodiments, the first length may be a second value, and the second value may be: the total number of symbol groups transmitted in one NPRACH.

[0514] In some other embodiments, when the first length is determined based on the number of NPRACH symbol groups, the first length may satisfy the following condition: the total number of symbol groups in one NPRACH transmission is an integer multiple of the first length, that is, Mod(G, L)=0.

[0515] In some further embodiments, when the first length is determined based on the number of NPRACH symbol groups, the first length may satisfy the following condition: the total number of symbol groups in N NPRACH transmissions is an integer multiple of the first length, that is, Mod(N×G,L)=0.

[0516] The third method is to determine the first length based on the number of repeated transmissions of NPRACH, that is, the basic unit of the first length is one NPRACH transmission.

[0517] Optionally, when the first length is determined based on the number of repeated transmissions of the NPRACH, the first length may satisfy the following condition: N is an integer multiple of the first length. Mod(N, L)=0.

[0518] Optionally, in some embodiments, different Coverage Enhancement (CE) levels of the NPRACH correspond to first lengths, and the first lengths corresponding to different CE levels may be the same or different. In other embodiments, different formats of the NPRACH correspond to first lengths, and the first lengths corresponding to different formats may be the same or different. In still other embodiments, NPRACHs with different numbers of repeated transmissions correspond to first lengths, and the first lengths corresponding to NPRACHs with different numbers of repeated transmissions may be the same or different.

[0519] Optionally, the first length can usually be determined by the first to third methods mentioned above, and after determining the first length, the OCC multiplexing mode can be determined based on the first length, wherein different first lengths correspond to different OCC multiplexing modes. The following introduces how the terminal specifically determines the OCC multiplexing mode based on the first length.

[0520] Optionally, in some embodiments, when the first length is the above-mentioned first value, the OCC multiplexing method can be: different sequence values ​​in the OCC sequence are respectively mapped to different symbols in the symbol group, and, optionally, different symbol groups transmitted by the same NPRACH can use the same OCC multiplexing method and the same OCC sequence.

[0521] Optionally, the above-mentioned “mapping” can be understood as weighted multiplication, for example, and the above-mentioned “different sequence values ​​in the OCC sequence are respectively mapped to different symbols in the symbol group” can be understood as: multiplying the NPRACH signal carried on different time domain symbols in the symbol group by different sequence values ​​in the OCC sequence.

[0522] For example, in some embodiments, for Preamble format 0 and Preamble format 1 corresponding to frame structure type 1, there are 5 symbols in a symbol group of NPRACH, then the first length can be 5, assuming that the i-th sequence value in the OCC sequence of terminal m is represented by Wm(i), (i=0,1,…,4), Figure 2E is a schematic diagram of OCC sequence mapping according to an embodiment of the present disclosure. As shown in Figure 2E, a symbol group includes 5 symbols, namely: S(0), S(1), S(2), S(3), S(4), and the OCC sequence of terminal m includes 5 sequence values, namely Wm(0), Wm(1), Wm(2), Wm(3), Wm(4), wherein Wm(0) is mapped to the symbol S(0) of each symbol group (that is, the N carried by the symbol S(0) of each symbol group). The NPRACH signal is multiplied by Wm(0)), Wm(1) is mapped to the symbol S(1) of each symbol group (i.e., the NPRACH signal carried by the symbol S(1) of each symbol group is multiplied by Wm(1)), Wm(2) is mapped to the symbol S(2) of each symbol group (i.e., the NPRACH signal carried by the symbol S(2) of each symbol group is multiplied by Wm(2)), Wm(3) is mapped to the symbol S(3) of each symbol group (i.e., the NPRACH signal carried by the symbol S(3) of each symbol group is multiplied by Wm(3)), and Wm(4) is mapped to the symbol S(4) of each symbol group (i.e., the NPRACH signal carried by the symbol S(4) of each symbol group is multiplied by Wm(4)).

[0523] It should be noted that, since the NPRACH signal is an all-1 signal, after the OCC sequence is mapped to the NPRACH symbol, the NPRACH after OCC mapping is actually the OCC sequence.

[0524] For example, in some other embodiments, for preamble format 2, there are 3 symbols in a symbol group of NPRACH. In this case, the first length can be 3, and the mapping principle of the OCC sequence and the 3 symbols in the NPRACH symbol group is similar to the mapping principle of the aforementioned OCC sequence and the 5 symbols in the NPRACH symbol group, which is not repeated here.

[0525] Optionally, in some other embodiments, when the first length satisfies the following condition: the total number of symbols in one NPRACH transmission is an integer multiple of the first length, the terminal may determine the OCC multiplexing mode of the NPRACH based on the first length by performing the following steps:

[0526] Step a: Number the symbols in one NPRACH transmission to obtain a symbol index.

[0527] Step b: number the sequence values ​​in the OCC sequence to obtain a sequence index.

[0528] Step c: Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol corresponding to the symbol index "x1"; wherein x1 and j satisfy at least one of the following conditions:

[0529] First condition: j = x1 mod L; where L is the first length and the mod function is a remainder function; the first condition is used to map a sequence value to a symbol;

[0530] Second condition: j = floor(x1 / M1) mod L; wherein the second condition is used to enable a sequence value to be continuously mapped to multiple symbols; M1 indicates the number of symbols continuously mapped to the same sequence value. For example, M1 can be equal to the number of symbols in a symbol group of NPRACH, and the floor function is a floor function.

[0531] Optionally, the meaning of the mapping here is the same as that of the aforementioned mapping, and will not be repeated here.

[0532] Optionally, in some embodiments, the above-mentioned M1 may satisfy the following condition: the product of M1, L, and K1 is equal to the total number of symbols in one NPRACH transmission; wherein the K1 indicates the number of repeated mappings of the OCC sequence in one NPRACH transmission.

[0533] Optionally, the terminal may determine the above-mentioned M1 and / or K1 based on at least one of the following methods:

[0534] Determine M1 and / or K1 based on network device configuration;

[0535] Determine M1 and / or K1 based on protocol presets;

[0536] Determine M1 and / or K1 based on ephemeris information;

[0537] Determine M1 and / or K1 based on a first association relationship, where the first association relationship may be an association relationship between the number of symbol groups in one NPRACH transmission and M1 and / or K1;

[0538] Determine M1 and / or K1 based on a second association relationship, where the second association relationship may be an association relationship between the first length and M1 and / or K1;

[0539] M1 and / or K1 are determined based on a third association relationship, where the third association relationship may be an association relationship between the total number of symbols in a symbol group of NPRACH and M1 and / or K1.

[0540] Optionally, the first association relationship, the second association relationship, and the third association relationship may be preset by a protocol and / or configured by a network device.

[0541] The specific meanings of the above-mentioned M1 and K1 are introduced below with examples.

[0542] For example, assume that the total number of symbols in one NPRACH transmission is 20, for example, the 20 symbols can be represented as S(i), i=0,1...19, the first length L is 2, and M1 is 2. This means that the OCC sequence includes two sequence values, for example, W(0) and W(1), and one sequence value of the OCC sequence can be continuously mapped to two symbols, that is, W(0) of the OCC sequence can be mapped to S(0) and S(1), and W(1) of the OCC sequence can be mapped to S(2) and S(3). Then, the OCC sequence is repeatedly mapped, that is, W(0) can be mapped to S(4) and S(5), and W(1) of the OCC sequence can be mapped to S(6) and S(7). By analogy, the number of repeated mappings of the OCC sequence in one NPRACH transmission is 5, that is, K1=5.

[0543] Optionally, when the terminal determines the OCC multiplexing mode using steps a to c above, the OCC multiplexing mode corresponding to one NPRACH transmission is specifically determined. In this case, different repeated transmissions of the same NPRACH may use the same OCC multiplexing mode and the same OCC sequence.

[0544] Optionally, in some further embodiments, when the first length satisfies the following condition: the total number of symbols in N NPRACH transmissions is an integer multiple of the first length, the terminal may determine the OCC multiplexing mode of the NPRACH based on the first length by performing the following steps:

[0545] Step A: Number the symbols in N NPRACH transmissions to obtain a symbol index;

[0546] Step B: numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0547] Step C: Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol corresponding to the symbol index "x2"; wherein x2 and j satisfy at least one of the following conditions:

[0548] The third condition: j = x2 mod L; where L is the first length and the mod function is a remainder function; the third condition is used to map a sequence value to a symbol;

[0549] Fourth condition: j = floor(x2 / M1) mod L; wherein the fourth condition is used to enable a sequence value to be continuously mapped to multiple symbols; M1 indicates the number of symbols to which a sequence value is continuously mapped. For example, M1 can be the number of symbols in a symbol group of NPRACH, or can be the number of symbols in one NPRACH transmission, and the floor function is a floor function.

[0550] Optionally, the above M1 may satisfy the following condition: the product of M1, L, and K2 is equal to the total number of symbols in N NPRACH transmissions; wherein K2 indicates the number of repetition mappings of the OCC sequence in the N NPRACH transmissions;

[0551] Optionally, the terminal may determine M1 and / or K2 in at least one of the following ways:

[0552] Determine M1 and / or K2 based on network device configuration;

[0553] Determine M1 and / or K2 based on protocol presets;

[0554] Determine M1 and / or K2 based on ephemeris information;

[0555] Determine M1 and / or K2 based on a fourth association relationship, where the fourth association relationship is: an association relationship between the number of symbol groups in one NPRACH transmission and M1 and / or K2;

[0556] Determine M1 and / or K2 based on a fifth association relationship, where the fifth association relationship is: an association relationship between the first length and M1 and / or K2;

[0557] Determine M1 and / or K2 based on a sixth association relationship, where the sixth association relationship is: an association relationship between the number of symbol groups in N NPRACH transmissions and M1 and / or K2;

[0558] Determine M1 and / or K2 based on a seventh association relationship, where the seventh association relationship is: an association relationship between the total number of symbols in N NPRACH transmissions and M1 and / or K2;

[0559] M1 and / or K2 are determined based on an eighth association relationship, where the eighth association relationship is: an association relationship between N and M1 and / or K2.

[0560] Optionally, the fourth association relationship, the fifth association relationship, the sixth association relationship, the seventh association relationship, and the eighth association relationship may be preset by a protocol and / or configured by a network device.

[0561] Optionally, the principles of the above steps A to C are similar to those of the aforementioned steps a to c, and are not repeated here.

[0562] Optionally, in some embodiments, when the first length is the above-mentioned second value, the OCC multiplexing method can be: different sequence values ​​in an OCC sequence are respectively mapped to symbols of different symbol groups, and, optionally, different repeated transmissions of the same NPRACH can use the same OCC multiplexing method and the same OCC sequence.

[0563] Optionally, the above-mentioned "mapping" can be understood as weighted multiplication, for example, and the above-mentioned "different sequence values ​​in the OCC sequence are mapped to symbols of different symbol groups respectively" can be understood as: multiplying the NPRACH signal carried by the symbols in different symbol groups by different sequence values ​​in the OCC sequence.

[0564] For example, in some embodiments, for Preamble format 0 and Preamble format 1 corresponding to frame structure type 1, NPRACH includes 4 symbol groups, namely Symbol group#0, Symbol group#1, Symbol group#2, and Symbol group#3. A possible embodiment is that the first length can be 4. It is assumed that the i-th sequence value in the OCC sequence of terminal m is represented by Wm(i), (i=0,1,…,3). At this time, Wm(0) can be mapped to the symbol of Symbol group#0 (i.e., the NPRACH signal carried on each symbol in Symbol group#0 is multiplied by Wm(0)), Wm(1) can be mapped to the symbol of Symbol group#1 (i.e., the NPRACH signal carried on each symbol in Symbol group#1 is multiplied by Wm(1)), Wm(2) can be mapped to the symbol of Symbol group#2 (i.e., the NPRACH signal carried on each symbol in Symbol group#2 is multiplied by Wm(2)), and Wm(3) can be mapped to the symbol of Symbol group#3 (i.e., the NPRACH signal carried on each symbol in Symbol group#3 is multiplied by Wm(3)).

[0565] Optionally, in some further embodiments, when the first length satisfies the following condition: the total number of symbol groups in one NPRACH transmission is an integer multiple of the first length, the terminal may determine the OCC multiplexing mode of the NPRACH based on the first length by performing the following steps:

[0566] Step 1: Number the symbol groups in one NPRACH transmission to obtain a symbol group index;

[0567] Step 2: Number the sequence values ​​in the OCC sequence to obtain a sequence index;

[0568] Step 3: Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol in the symbol group corresponding to the symbol group index "i1", where i1 and j satisfy at least one of the following conditions:

[0569] Fifth condition: j=i1 mod L; where L is the first length and the mod function is a remainder function; the fifth condition is used to map a sequence value to a symbol group;

[0570] The sixth condition: j = floor(i1 / M2) mod L; wherein the sixth condition is used to enable a sequence value to be continuously mapped to multiple symbol groups; M2 indicates the number of symbol groups to which a sequence value is continuously mapped. For example, M2 = 1, and the floor function is a floor function.

[0571] Optionally, the product of M2, L, and K3 may be equal to the total number of symbol groups in one NPRACH transmission; wherein K3 indicates the number of repeated mappings of the OCC sequence in one NPRACH transmission;

[0572] The specific meanings of the above-mentioned M2 and K3 are introduced below with examples.

[0573] For example, assume that the number of symbol groups in one NPRACH transmission is 4, for example, Symbol group #i, i = 0, 1, 2, 3, the first length L is 2, and M2 is 2. This means that the OCC sequence includes two sequence values, for example, W(0) and W(1), and one sequence value of the OCC sequence can be continuously mapped to two symbol groups, that is, W(0) of the OCC sequence can be mapped to Symbol group #0 and Symbol group #1, and W(1) of the OCC sequence can be mapped to Symbol group #2 and Symbol group #3. At this time, the number of repeated mappings of the OCC sequence in one NPRACH transmission is 1, that is, K3 = 1.

[0574] Optionally, the terminal may determine the above-mentioned M2 and / or K3 based on at least one of the following methods:

[0575] Determine M2 and / or K3 based on network device configuration;

[0576] Determine M2 and / or K3 based on ephemeris information;

[0577] M2 and / or K3 are determined based on protocol presets.

[0578] Optionally, when the terminal determines the OCC multiplexing mode using steps 1 to 3 above, the OCC multiplexing mode corresponding to one NPRACH transmission is specifically determined. In this case, different repeated transmissions of the same NPRACH may use the same OCC multiplexing mode and the same OCC sequence.

[0579] Optionally, in some further embodiments, when the first length satisfies the following condition: the total number of symbol groups in N NPRACH transmissions is an integer multiple of the first length, the terminal may determine the OCC multiplexing mode of the NPRACH based on the first length by performing the following steps:

[0580] Step 1: Number the symbol groups in N NPRACH transmissions to obtain a symbol group index;

[0581] Step 2: Number the sequence values ​​in the OCC sequence to obtain a sequence index;

[0582] Step 3: Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol in the symbol group corresponding to the symbol group index "i2"; wherein i2 and j satisfy at least one of the following conditions:

[0583] The seventh condition: j=i2 mod L; wherein L is the first length and the mod function is a remainder function; the seventh condition is used to map a sequence value to a symbol group;

[0584] The eighth condition: j=floor(x2 / M2) mod L; wherein the eighth condition is used to enable a sequence value to be continuously mapped to multiple symbol groups; M2 indicates the number of symbol groups to which a sequence value is continuously mapped, and the floor function is a floor function.

[0585] Optionally, the product of M2, L, and K4 is equal to the total number of symbol groups in N NPRACH transmissions; wherein K4 indicates the number of repeated mappings of the OCC sequence in the N NPRACH transmissions;

[0586] Optionally, the terminal may determine M2 and / or K4 in at least one of the following ways:

[0587] Determine M2 and / or K4 based on network device configuration;

[0588] Determine M2 and / or K4 based on ephemeris information;

[0589] M2 and / or K4 are determined based on protocol presets.

[0590] Optionally, the principles of the above steps 1 to 3 are similar to the principles of the aforementioned steps 1 to 3, and are not repeated here.

[0591] Optionally, in some further embodiments, when the first length satisfies the following condition: N is an integer multiple of the first length, the terminal may determine the OCC multiplexing mode of the NPRACH based on the first length by performing the following steps:

[0592] Step D: numbering the number of repeated transmissions of NPRACH to obtain a number index;

[0593] Step E: Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0594] Step F: Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol of the NPRACH transmission corresponding to the number index "f", where f and j satisfy at least one of the following conditions:

[0595] Ninth condition: j=f mod L; where L is the first length and the mod function is a remainder function; the ninth condition is used to map a sequence value to one NPRACH transmission;

[0596] The tenth condition: j=floor(f / M3) mod L; wherein the tenth condition is used to enable a sequence value to be continuously mapped to multiple NPRACH transmissions; M3 indicates the number of NPRACH transmissions to which a sequence value is continuously mapped, and the floor function is a floor function.

[0597] Optionally, the above-mentioned "mapping" can be understood as weighted multiplication, for example, and the above-mentioned "mapping the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol of the NPRACH transmission corresponding to the number index "f"" can be understood as: multiplying the NPRACH signal carried on the symbol of the f-th NPRACH transmission by the j-th sequence value in the OCC sequence.

[0598] For example, in some embodiments, for Preamble format 0 and Preamble format 1 corresponding to frame structure type 1, the number of repeated transmissions of NPRACH is 4 times, namely repetition#0, repetition#1, repetition#2, and repetition#3, then the first length can be 4. Assume that the i-th sequence value in the OCC sequence of terminal m is represented by Wm(i), (i=0,1,…,3). At this time, Wm(0) can be mapped to the symbol of repetition#0 (i.e., the NPRACH signal carried on each symbol in repetition#0 is multiplied by Wm(0)), Wm(1) can be mapped to the symbol of repetition#1 (i.e., the NPRACH signal carried on each symbol in repetition#1 is multiplied by Wm(1)), Wm(2) can be mapped to the symbol of repetition#2 (i.e., the NPRACH signal carried on each symbol in repetition#2 is multiplied by Wm(2)), and Wm(3) can be mapped to the symbol of repetition#3 (i.e., the NPRACH signal carried on each symbol in repetition#3 is multiplied by Wm(3)).

[0599] Optionally, the product of the above M3, L, and K5 is equal to N; wherein K5 indicates the number of repeated mappings of the OCC sequence in N NPRACH transmissions;

[0600] Optionally, the terminal may determine the above-mentioned M3 and / or K5 in at least one of the following ways:

[0601] Determine M3 and / or K5 based on network device configuration;

[0602] Determine M3 and / or K5 based on ephemeris information;

[0603] M3 and / or K5 are determined based on protocol presets.

[0604] The following is an introduction to the specific meanings of the above-mentioned M3 and K5.

[0605] For example, assume that the number of NPRACH repetition transmissions is 4, namely repetition #0, repetition #1, repetition #2, and repetition #3, the first length L is 2, and M3 is 2. This means that the OCC sequence includes two sequence values, for example, W(0) and W(1), and one sequence value of the OCC sequence can be continuously mapped to two NPRACH transmissions, that is, W(0) of the OCC sequence can be mapped to repetition #0 and repetition #1, and W(1) of the OCC sequence can be mapped to repetition #2 and repetition #3. At this time, the number of repetition mappings of the OCC sequence in N NPRACH transmissions is 1, that is, K5 = 1.

[0606] Optionally, in some embodiments, different CE levels of NPRACH correspond to OCC multiplexing modes, and the OCC multiplexing modes corresponding to different CE levels may be the same or different; in other embodiments, different formats of NPRACH correspond to OCC multiplexing modes, and the OCC multiplexing modes corresponding to different formats may be the same or different; in still other embodiments, NPRACHs with different numbers of repeated transmissions correspond to OCC multiplexing modes, and the OCC multiplexing modes corresponding to NPRACHs with different numbers of repeated transmissions may be the same or different.

[0607] It should be noted that in some embodiments, when the above method is used to determine the OCC multiplexing mode, each cyclic prefix (CP) except the first CP in the N repeated transmissions of the NPRACH can also be mapped as a symbol to the sequence value of the OCC sequence. In addition, the OCC sequence value mapped to the last symbol in the N repeated transmissions of the NPRACH can be mapped to the first CP in the N repeated transmissions of the NPRACH.

[0608] It should also be noted that in other embodiments, the terminal may not need to determine the OCC multiplexing mode of the NPRACH based on the first length described above, but may instead directly determine the OCC multiplexing mode of the NPRACH based on protocol pre-definition. That is, the terminal may directly determine the OCC multiplexing mode of the NPRACH of the terminal as any of the aforementioned OCC multiplexing modes based on protocol pre-definition. Alternatively, in yet another embodiment, multiple OCC multiplexing modes may be pre-defined by the protocol, and the terminal may determine the OCC multiplexing mode of the NPRACH of the terminal as any of the pre-defined multiple OCC multiplexing modes based on an instruction and / or configuration of a network device.

[0609] Step 2105: The network device determines the OCC multiplexing mode.

[0610] The principle of the network device determining the OCC multiplexing mode is similar to the principle of the terminal determining the OCC multiplexing mode in the above step 2104, and will not be repeated here.

[0611] Step 2106: The terminal sends NPRACH based on the OCC sequence and OCC multiplexing mode.

[0612] Optionally, the terminal may send the NPRACH to the network device based on the OCC sequence and the OCC multiplexing mode, and the network device may receive the NPRACH sent by the terminal based on the OCC sequence and the OCC multiplexing mode.

[0613] Specifically, in some embodiments, the terminal may map the OCC sequence to the NPRACH based on the OCC multiplexing mode determined in the aforementioned steps, and transmit the NPRACH after the OCC sequence is mapped (or referred to as: the NPRACH after weighting processing). Furthermore, after receiving the NPRACH to which the OCC sequence is mapped sent by the terminal, the network device may determine the NPRACH corresponding to the terminal based on the determined OCC multiplexing mode and OCC sequence corresponding to the terminal. For example, the network device may divide the value of each symbol in the "NPRACH to which the OCC sequence is mapped" of the terminal by the corresponding OCC sequence value based on the OCC multiplexing mode corresponding to the terminal, thereby determining the NPRACH.

[0614] Optionally, in some embodiments, when sending NPRACH based on the OCC sequence and the OCC multiplexing mode, the terminal may adopt at least one of the following processes:

[0615] The first method is to generate an NPRACH sequence, map the NPRACH sequence to a symbol to form an NPRACH signal, and then map the OCC sequence to the NPRACH signal based on the OCC multiplexing method to generate a baseband signal (that is, the aforementioned NPRACH signal mapped with the OCC sequence, or referred to as: NPRACH after weighted processing).

[0616] For example, assuming that the OCC sequence of terminal #m is represented by Wm, the baseband signal generation method in the first method is implemented using the following formula.

[0617] Wherein, j=0, 1, 2...L-1, L is the length of the OCC sequence, Wm(j) represents the j+1th sequence value in the OCC sequence, S i (t) represents the baseband signal, and the part on the right side of the equal sign of the formula except Wm(j) is used to generate the NPRACH signal.

[0618] The second method is to generate an NPRACH sequence, map the NPRACH sequence to a symbol, and then map the OCC sequence to the symbol based on the OCC multiplexing method to generate a baseband signal.

[0619] Method 3: Generate an NPRACH sequence, map the OCC sequence to the NPRACH sequence based on the OCC multiplexing method, map the NPRACH sequence mapped with the OCC sequence to a symbol, and generate a baseband signal.

[0620] In some embodiments, the third method is essentially that the OCC sequence covers the NPRACH sequence. Optionally, assuming that the NPRACH sequence is represented by SP(i) and the OCC sequence is represented by Wm(j), the baseband signal can be SP(i)*Wm(j), where i represents the i-th symbol of the NPRACH sequence, SP(i) represents the NPRACH signal carried by the i-th symbol of the NPRACH sequence, and Wm(j) has the same meaning as above.

[0621] Method 4: Generate an NPRACH sequence mapped with an OCC sequence based on an OCC multiplexing method, map the NPRACH sequence mapped with the OCC sequence to a symbol, and generate a baseband signal.

[0622] In some embodiments, under the fourth method, it is assumed that the OCC sequence corresponding to the m-th terminal is OCC sequence #m, and the OCC sequence #m is represented by Wm(j). Since the NPRACH sequence is an all-1 value, when the j+1-th sequence value in the OCC sequence #mWm(j) is mapped to the symbol #k in the symbol group #i of the NPRACH, the NPRACH sequence corresponding to the symbol of the NPRACH can also be expressed as: Wm(j).

[0623] In the above embodiment, a method is provided for a terminal to send an NPRACH based on the OCC technology. By executing the method of the present disclosure, different terminals can respectively use different OCC sequences to multiplex and send their own NPRACHs on the same time-frequency resources. In addition, a network device can determine the NPRACH of each terminal on the same time-frequency resources based on the OCC sequence corresponding to the terminal, so that the NPRACH can be multiplexed and sent by multiple users on the same time-frequency resources, thereby achieving uplink capacity enhancement and system expansion. Under the premise of limited time-frequency resources and limited terminal transmit power, more terminals can be supported for uplink transmission, thereby improving uplink transmission efficiency.

[0624] The communication method according to the embodiments of the present disclosure may include at least one of steps 2101 to 2106. For example, step 2101 may be implemented as an independent embodiment, step 2102 may be implemented as an independent embodiment, step 2103 may be implemented as an independent embodiment, and step 2101+step 2102 may be implemented as an independent embodiment, but the present invention is not limited thereto.

[0625] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, the optional methods or optional examples can be arbitrarily combined, and can be arbitrarily combined with any steps of other embodiments or other examples.

[0626] FIG3A is an interactive diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG3A , the embodiment of the present disclosure relates to a communication method for a terminal, the method comprising:

[0627] Step 3101: Receive first information.

[0628] Step 3102: Determine the OCC sequence.

[0629] Step 3103: Determine the OCC multiplexing mode of NPRACH.

[0630] Step 3104: Send NPRACH based on the OCC sequence and OCC multiplexing method.

[0631] For a detailed description of steps 3101-3104, please refer to the above embodiment description.

[0632] The communication method involved in the embodiments of the present disclosure may include at least one of steps 3101 to 3104. For example, step 3101 may be implemented as an independent embodiment, step 3102 may be implemented as an independent embodiment, step 3103 may be implemented as an independent embodiment, and step 3101+step 3102 may be implemented as an independent embodiment, but the present invention is not limited thereto.

[0633] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, the optional methods or optional examples can be arbitrarily combined, and can be arbitrarily combined with any steps of other embodiments or other examples.

[0634] FIG3B is an interactive diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG3B , the embodiment of the present disclosure relates to a communication method for a terminal, the method comprising:

[0635] Step 3201: Determine the OCC sequence corresponding to the NPRACH of the terminal.

[0636] Step 3202: Determine the OCC multiplexing mode of NPRACH.

[0637] Step 3203: Send NPRACH based on the OCC sequence and OCC multiplexing method.

[0638] Optionally, the determining an OCC multiplexing mode of the NPRACH includes:

[0639] Determine a first length, where the first length is: a sequence length of an OCC sequence corresponding to the NPRACH;

[0640] Determine an OCC multiplexing mode of the NPRACH based on the first length.

[0641] Optionally, determining the first length includes at least one of the following:

[0642] Determining the first length based on a protocol preset;

[0643] determining the first length based on a configuration of the network device;

[0644] The first length is determined based on an indication from a network device.

[0645] Optionally, determining the first length includes:

[0646] The first length is determined based on the number of symbols symbol of the NPRACH.

[0647] Optionally, the determining the first length based on the number of symbols of the NPRACH includes:

[0648] The first length is determined to be a first value, where the first value is: the total number of symbols in a symbol group of the NPRACH.

[0649] Optionally, the determining an OCC multiplexing mode of the NPRACH includes:

[0650] The OCC multiplexing mode is determined as follows: different sequence values ​​in the OCC sequence are respectively mapped to different symbols in the symbol group.

[0651] Optionally, different symbol groups transmitted by the same NPRACH adopt the same OCC multiplexing mode and the same OCC sequence.

[0652] Optionally, the first length satisfies the following condition: the total number of symbols in one NPRACH transmission is an integer multiple of the first length.

[0653] Optionally, the determining an OCC multiplexing mode of the NPRACH includes:

[0654] Numbering symbols in the NPRACH transmission once to obtain a symbol index;

[0655] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0656] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol corresponding to the symbol index "x1", where x1 and j satisfy at least one of the following conditions:

[0657] First condition: j=x1 mod L; wherein L is the first length, and the mod function is a remainder function; the first condition is used to map one of the sequence values ​​to one symbol;

[0658] The second condition: j=floor(x1 / M1) mod L; wherein the second condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbols; the M1 indicates the number of symbols to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

[0659] Optionally, the M1 satisfies the following condition: the product of the M1, L, and K1 is equal to the total number of symbols in one NPRACH transmission; wherein, the K1 indicates the number of repeated mappings of the OCC sequence in one NPRACH transmission;

[0660] The M1 and / or K1 are provided by at least one of the following methods:

[0661] Determining the M1 and / or K1 based on the network device configuration;

[0662] Determine the M1 and / or K1 based on the protocol preset;

[0663] Determine the M1 and / or K1 based on a first association relationship, where the first association relationship is: an association relationship between the number of symbol groups in one NPRACH transmission and the M1 and / or K1;

[0664] Determine the M1 and / or K1 based on a second association relationship, where the second association relationship is: an association relationship between the first length and the M1 and / or K1;

[0665] The M1 and / or K1 are determined based on a third association relationship, where the third association relationship is: an association relationship between the total number of symbols in a symbol group of the NPRACH and the M1 and / or K1.

[0666] Optionally, different repeated transmissions of the same NPRACH adopt the same OCC multiplexing mode and the same OCC sequence.

[0667] Optionally, the first length satisfies the following conditions: the total number of symbols in N NPRACH transmissions is an integer multiple of the first length; and N is determined by the total number of repeated transmissions of the NPRACH.

[0668] Optionally, the determining an OCC multiplexing mode of the NPRACH includes:

[0669] Numbering symbols in the N NPRACH transmissions to obtain symbol indexes;

[0670] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0671] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol corresponding to the symbol index "x2", where x2 and j satisfy at least one of the following conditions:

[0672] The third condition: j=x2 mod L; wherein L is the first length and the mod function is a remainder function; the third condition is used to map one of the sequence values ​​to one symbol;

[0673] The fourth condition: j=floor(x2 / M1) mod L; wherein the fourth condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbols; M1 indicates the number of symbols to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

[0674] Optionally, M1 satisfies the following condition: the product of M1, L, and K2 is equal to the total number of symbols in the N NPRACH transmissions; wherein K2 indicates the number of repetition mappings of the OCC sequence in the N NPRACH transmissions;

[0675] The M1 and / or K2 are in at least one of the following ways:

[0676] Determining the M1 and / or K2 based on the network device configuration;

[0677] Determine the M1 and / or K2 based on the protocol preset;

[0678] Determine the M1 and / or K2 based on a fourth association relationship, where the fourth association relationship is: an association relationship between the number of symbol groups in one NPRACH transmission and the M1 and / or K2;

[0679] Determine the M1 and / or K2 based on a fifth association relationship, where the fifth association relationship is: an association relationship between the first length and the M1 and / or K2;

[0680] Determine the M1 and / or K2 based on a sixth association relationship, where the sixth association relationship is: an association relationship between the number of symbol groups in the N NPRACH transmissions and the M1 and / or K2;

[0681] Determine the M1 and / or K2 based on a seventh association relationship, where the seventh association relationship is: an association relationship between a total number of symbols in the N NPRACH transmissions and the M1 and / or K2;

[0682] The M1 and / or K2 are determined based on an eighth association relationship, where the eighth association relationship is: an association relationship between N and the M1 and / or K2.

[0683] Optionally, determining the first length includes:

[0684] The first length is determined based on the number of symbol groups of the NPRACH.

[0685] Optionally, the determining the first length based on the number of symbol groups of the NPRACH includes:

[0686] Determine the first length as a second value, where the second value is: the total number of symbol groups transmitted in one NPRACH transmission.

[0687] Optionally, the determining an OCC multiplexing mode of the NPRACH includes:

[0688] The OCC multiplexing mode is determined as follows: different sequence values ​​in the OCC sequence are respectively mapped to symbols of different symbol groups.

[0689] Optionally, different repeated transmissions of the same NPRACH adopt the same OCC multiplexing mode and the same OCC sequence.

[0690] Optionally, the first length satisfies the following condition: the total number of symbol groups in one NPRACH transmission is an integer multiple of the first length.

[0691] Optionally, the determining an OCC multiplexing mode of the NPRACH includes:

[0692] Numbering a symbol group in the NPRACH transmission to obtain a symbol group index;

[0693] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0694] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol in the symbol group corresponding to the symbol group index "i1", where i1 and j satisfy at least one of the following conditions:

[0695] Fifth condition: j=i1 mod L; wherein L is the first length and the mod function is a remainder function; the fifth condition is used to map one of the sequence values ​​to one symbol group;

[0696] The sixth condition: j=floor(i1 / M2) mod L; wherein the sixth condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbol groups; M2 indicates the number of symbol groups to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

[0697] Optionally, the product of M2, L, and K3 is equal to the total number of symbol groups in one NPRACH transmission; wherein K3 indicates the number of repeated mappings of the OCC sequence in one NPRACH transmission;

[0698] The M2 and / or K3 are in at least one of the following ways:

[0699] Determining the M2 and / or K3 based on the network device configuration;

[0700] The M2 and / or K3 are determined based on protocol presets.

[0701] Optionally, different repeated transmissions of the same NPRACH adopt the same OCC multiplexing mode and the same OCC sequence.

[0702] Optionally, the first length satisfies the following conditions: the total number of symbol groups in N NPRACH transmissions is an integer multiple of the first length; and N is determined by the total number of repeated transmissions of the NPRACH.

[0703] Optionally, the determining an OCC multiplexing mode of the NPRACH includes:

[0704] Numbering the symbol groups in the N NPRACH transmissions to obtain a symbol group index;

[0705] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0706] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol in the symbol group corresponding to the symbol group index "i2", where i2 and j satisfy at least one of the following conditions:

[0707] Seventh condition: j=i2 mod L; wherein L is the first length, and the mod function is a remainder function; the seventh condition is used to map one of the sequence values ​​to one symbol group;

[0708] The eighth condition: j=floor(x2 / M2)mod L; wherein the eighth condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbol groups; M2 indicates the number of symbol groups to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

[0709] Optionally, the product of M2, L, and K4 is equal to the total number of symbol groups in the N NPRACH transmissions; wherein K4 indicates the number of repeated mappings of the OCC sequence in the N NPRACH transmissions;

[0710] The M2 and / or K4 are provided by at least one of the following methods:

[0711] Determining the M2 and / or K4 based on the network device configuration;

[0712] The M2 and / or K4 are determined based on protocol presets.

[0713] Optionally, determining the first length includes:

[0714] The first length is determined based on the number of repeated transmissions of the NPRACH.

[0715] Optionally, the first length satisfies the following conditions: N is an integer multiple of the first length; and N is determined by the total number of repeated transmissions of the NPRACH.

[0716] Optionally, the determining an OCC multiplexing mode of the NPRACH includes:

[0717] Numbering the number of repeated transmissions of the NPRACH to obtain a number index;

[0718] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0719] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol of the NPRACH transmission corresponding to the number index "f", where f and j satisfy at least one of the following conditions:

[0720] Ninth condition: j=f mod L; wherein L is the first length and the mod function is a remainder function; the ninth condition is used to map one sequence value to one NPRACH transmission;

[0721] The tenth condition: j = floor(f / M3) mod L; wherein the tenth condition is used to enable one sequence value to be continuously mapped to multiple NPRACH transmissions; M3 indicates the number of NPRACH transmissions to which one sequence value is continuously mapped, and the floor function is a floor function.

[0722] Optionally, the product of M3, L, and K5 is equal to N; wherein K5 indicates the number of repeated mappings of the OCC sequence in N NPRACH transmissions;

[0723] The M3 and / or K5 are provided by at least one of the following methods:

[0724] Determining the M3 and / or K5 based on the network device configuration;

[0725] The M3 and / or K5 are determined based on protocol presets.

[0726] Optionally, the determining an OCC sequence corresponding to the NPRACH includes at least one of the following:

[0727] Determining the OCC sequence based on a protocol preset table;

[0728] Determining the OCC sequence based on a configuration of a network device;

[0729] Determining the OCC sequence based on an indication from a network device;

[0730] Determine the OCC sequence based on a protocol preset sequence generation method;

[0731] The determined sequence length of the OCC sequence is the first length.

[0732] Optionally, different coverage enhancement CE levels of the NPRACH correspond to first lengths respectively, and the first lengths corresponding to different CE levels are the same or different; and / or

[0733] The different formats of the NPRACH respectively correspond to a first length, and the first lengths corresponding to the different formats are the same or different; and / or

[0734] The NPRACHs with different numbers of repeated transmissions respectively correspond to first lengths, and the first lengths corresponding to the NPRACHs with different numbers of repeated transmissions are the same or different.

[0735] Optionally, the first length is greater than or equal to the number of multiplexed users.

[0736] Optionally, the OCC sequence is a cyclic shift sequence, and the first length is greater than the number of multiplexed users.

[0737] Optionally, the OCC sequences corresponding to different terminals on the same resource are orthogonal; and / or

[0738] The mutual correlation between OCC sequences corresponding to different terminals on the same resource is less than a first threshold.

[0739] Optionally, each CP except the first cyclic prefix CP in the N repeated transmissions of the NPRACH is respectively mapped as a symbol to the sequence value of the OCC sequence.

[0740] Optionally, different coverage enhancement CE levels of the NPRACH correspond to OCC multiplexing modes respectively, and the OCC multiplexing modes corresponding to different CE levels are the same or different; and / or

[0741] The different formats of the NPRACH respectively correspond to OCC multiplexing modes, and the OCC multiplexing modes corresponding to the different formats are the same or different; and / or

[0742] The NPRACHs with different repeated transmission times correspond to OCC multiplexing modes respectively, and the OCC multiplexing modes corresponding to the NPRACHs with different repeated transmission times are the same or different.

[0743] For a detailed description of steps 3201-3203, please refer to the above embodiment description.

[0744] The communication method involved in the embodiments of the present disclosure may include at least one of steps 3201 to 3203. For example, step 3201 may be implemented as an independent embodiment, step 3202 may be implemented as an independent embodiment, step 3203 may be implemented as an independent embodiment, and step 3201+S3202 may be implemented as an independent embodiment, but the present invention is not limited thereto.

[0745] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, the optional methods or optional examples can be arbitrarily combined, and can be arbitrarily combined with any steps of other embodiments or other examples.

[0746] FIG4A is an interactive diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG4A , the embodiment of the present disclosure relates to a communication method for a network device, the method comprising:

[0747] Step 4101: Determine the OCC sequence.

[0748] Step 4102: Send the first message.

[0749] Step 4103: Determine the OCC multiplexing mode of NPRACH.

[0750] Step 4104: Receive NPRACH based on the OCC sequence and OCC multiplexing method.

[0751] For a detailed description of steps 4101-4104, please refer to the above embodiment description.

[0752] The communication method involved in the embodiments of the present disclosure may include at least one of steps 4101 to 4104. For example, step 4101 may be implemented as an independent embodiment, step 4102 may be implemented as an independent embodiment, step 4103 may be implemented as an independent embodiment, and step 4101+step 4102 may be implemented as an independent embodiment, but the present invention is not limited thereto.

[0753] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, the optional methods or optional examples can be arbitrarily combined, and can be arbitrarily combined with any steps of other embodiments or other examples.

[0754] FIG4B is an interactive diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG4B , the embodiment of the present disclosure relates to a communication method for a network device, the method comprising:

[0755] Step 4201: Determine the OCC sequence corresponding to the terminal NPRACH.

[0756] Step 4202: Determine the OCC multiplexing mode of NPRACH.

[0757] Step 4203: Receive NPRACH based on the OCC sequence and OCC multiplexing method.

[0758] Optionally, the determining an OCC multiplexing mode of the NPRACH includes:

[0759] Determine a first length, where the first length is: a sequence length of an OCC sequence corresponding to the NPRACH;

[0760] Determine an OCC multiplexing mode of the NPRACH based on the first length.

[0761] Optionally, determining the first length includes:

[0762] The first length is determined based on protocol presets and / or autonomously by the network device.

[0763] Optionally, the method further includes:

[0764] The first length is configured for the terminal.

[0765] Optionally, the first length is a first value, and the first value is: the total number of symbols in a symbol group symbol group of the NPRACH.

[0766] Optionally, the determining an OCC multiplexing mode of the NPRACH includes:

[0767] The OCC multiplexing mode is determined as follows: different sequence values ​​in the OCC sequence are respectively mapped to different symbols in the symbol group.

[0768] Optionally, different symbol groups transmitted by the same NPRACH adopt the same OCC multiplexing mode and the same OCC sequence.

[0769] Optionally, the first length satisfies the following condition: the total number of symbols in one NPRACH transmission is an integer multiple of the first length.

[0770] Optionally, the determining an OCC multiplexing mode of the NPRACH includes:

[0771] Numbering symbols in the NPRACH transmission once to obtain a symbol index;

[0772] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0773] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol corresponding to the symbol index "x1", where x1 and j satisfy at least one of the following conditions:

[0774] First condition: j=x1 mod L; wherein L is the first length, and the mod function is a remainder function; the first condition is used to map one of the sequence values ​​to one symbol;

[0775] The second condition: j=floor(x1 / M1) mod L; wherein the second condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbols; the M1 indicates the number of symbols to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

[0776] Optionally, the M1 satisfies the following condition: the product of the M1, L, and K1 is equal to the total number of symbols in one NPRACH transmission; wherein, the K1 indicates the number of repeated mappings of the OCC sequence in one NPRACH transmission.

[0777] Optionally, different repeated transmissions of the same NPRACH adopt the same OCC multiplexing mode and the same OCC sequence.

[0778] Optionally, the first length satisfies the following conditions: the total number of symbols in N NPRACH transmissions is an integer multiple of the first length; and N is determined by the total number of repeated transmissions of the NPRACH.

[0779] Optionally, the determining an OCC multiplexing mode of the NPRACH includes:

[0780] Numbering symbols in the N NPRACH transmissions to obtain symbol indexes;

[0781] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0782] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol corresponding to the symbol index "x2", where x2 and j satisfy at least one of the following conditions:

[0783] The third condition: j=x2 mod L; wherein L is the first length and the mod function is a remainder function; the third condition is used to map one of the sequence values ​​to one symbol;

[0784] The fourth condition: j=floor(x2 / M1) mod L; wherein the fourth condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbols; M1 indicates the number of symbols to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

[0785] Optionally, the M1 satisfies the following condition: the product of the M1, L, and K2 is equal to the total number of symbols in the N NPRACH transmissions; wherein, the K2 indicates the number of repeated mappings of the OCC sequence in the N NPRACH transmissions.

[0786] Optionally, the determining the first length based on the number of symbol groups of the NPRACH includes:

[0787] Determine the first length as a second value, where the second value is: the total number of symbol groups transmitted in one NPRACH transmission.

[0788] Optionally, the determining an OCC multiplexing mode of the NPRACH includes:

[0789] The OCC multiplexing mode is determined as follows: different sequence values ​​in the OCC sequence are respectively mapped to symbols of different symbol groups.

[0790] Optionally, different repeated transmissions of the same NPRACH adopt the same OCC multiplexing mode and the same OCC sequence.

[0791] Optionally, the first length satisfies the following condition: the total number of symbol groups in one NPRACH transmission is an integer multiple of the first length.

[0792] Optionally, the determining an OCC multiplexing mode of the NPRACH includes:

[0793] Numbering a symbol group in the NPRACH transmission to obtain a symbol group index;

[0794] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0795] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol in the symbol group corresponding to the symbol group index "i1", where i1 and j satisfy at least one of the following conditions:

[0796] Fifth condition: j=i1 mod L; wherein L is the first length and the mod function is a remainder function; the fifth condition is used to map one of the sequence values ​​to one symbol group;

[0797] The sixth condition: j=floor(i1 / M2) mod L; wherein the sixth condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbol groups; M2 indicates the number of symbol groups to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

[0798] Optionally, the product of M2, L, and K3 is equal to the total number of symbol groups in one NPRACH transmission; wherein, K3 indicates the number of repeated mappings of the OCC sequence in one NPRACH transmission.

[0799] Optionally, different repeated transmissions of the same NPRACH adopt the same OCC multiplexing mode and the same OCC sequence.

[0800] Optionally, the first length satisfies the following conditions: the total number of symbol groups in N NPRACH transmissions is an integer multiple of the first length; and N is determined by the total number of repeated transmissions of the NPRACH.

[0801] Optionally, the determining an OCC multiplexing mode of the NPRACH includes:

[0802] Numbering the symbol groups in the N NPRACH transmissions to obtain a symbol group index;

[0803] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0804] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol in the symbol group corresponding to the symbol group index "i2", where i2 and j satisfy at least one of the following conditions:

[0805] Seventh condition: j=i2 mod L; wherein L is the first length, and the mod function is a remainder function; the seventh condition is used to map one of the sequence values ​​to one symbol group;

[0806] The eighth condition: j=floor(x2 / M2)mod L; wherein the eighth condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbol groups; M2 indicates the number of symbol groups to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

[0807] Optionally, the product of M2, L, and K4 is equal to the total number of symbol groups in the N NPRACH transmissions; wherein, K4 indicates the number of repeated mappings of the OCC sequence in the N NPRACH transmissions.

[0808] Optionally, the first length satisfies the following conditions: N is an integer multiple of the first length; and N is determined by the total number of repeated transmissions of the NPRACH.

[0809] Optionally, the determining an OCC multiplexing mode of the NPRACH includes:

[0810] Numbering the number of repeated transmissions of the NPRACH to obtain a number index;

[0811] Numbering the sequence values ​​in the OCC sequence to obtain a sequence index;

[0812] Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol of the NPRACH transmission corresponding to the number index "f", where f and j satisfy at least one of the following conditions:

[0813] Ninth condition: j=f mod L; wherein L is the first length and the mod function is a remainder function; the ninth condition is used to map one sequence value to one NPRACH transmission;

[0814] The tenth condition: j = floor(f / M3) mod L; wherein the tenth condition is used to enable one sequence value to be continuously mapped to multiple NPRACH transmissions; M3 indicates the number of NPRACH transmissions to which one sequence value is continuously mapped, and the floor function is a floor function.

[0815] Optionally, the product of M3, L, and K5 is equal to N; wherein K5 indicates the number of repeated mappings of the OCC sequence in N NPRACH transmissions.

[0816] Optionally, the determining an OCC sequence corresponding to the NPRACH includes at least one of the following:

[0817] Determining the OCC sequence based on a protocol preset table;

[0818] Determine the OCC sequence based on a protocol preset sequence generation method;

[0819] The determined sequence length of the OCC sequence is the first length.

[0820] Optionally, the method further includes:

[0821] The OCC sequence is configured and / or indicated to the terminal.

[0822] Optionally, different CE levels of the NPRACH correspond to first lengths respectively, and the first lengths corresponding to different CE levels are the same or different; and / or

[0823] The different formats of the NPRACH respectively correspond to a first length, and the first lengths corresponding to the different formats are the same or different; and / or

[0824] The NPRACHs with different numbers of repeated transmissions respectively correspond to first lengths, and the first lengths corresponding to the NPRACHs with different numbers of repeated transmissions are the same or different.

[0825] Optionally, the first length is greater than or equal to the number of multiplexed users.

[0826] Optionally, the OCC sequence is a cyclic shift sequence, and the first length is greater than the number of multiplexed users.

[0827] Optionally, the OCC sequences corresponding to different terminals on the same resource are orthogonal; and / or

[0828] The mutual correlation between OCC sequences corresponding to different terminals on the same resource is less than a first threshold.

[0829] Optionally, each CP except the first CP in the N repeated transmissions of the NPRACH is respectively mapped as a symbol to the sequence value of the OCC sequence.

[0830] Optionally, different coverage enhancement CE levels of the NPRACH correspond to OCC multiplexing modes respectively, and the OCC multiplexing modes corresponding to different CE levels are the same or different; and / or

[0831] The different formats of the NPRACH respectively correspond to OCC multiplexing modes, and the OCC multiplexing modes corresponding to the different formats are the same or different; and / or

[0832] The NPRACHs with different repeated transmission times correspond to OCC multiplexing modes respectively, and the OCC multiplexing modes corresponding to the NPRACHs with different repeated transmission times are the same or different.

[0833] For a detailed description of steps 4201-4203, please refer to the above embodiment description.

[0834] The communication method involved in the embodiments of the present disclosure may include at least one of steps 4201 to 4203. For example, step 4201 may be implemented as an independent embodiment, step 4202 may be implemented as an independent embodiment, step 4203 may be implemented as an independent embodiment, and step 4201+S4202 may be implemented as an independent embodiment, but the present invention is not limited thereto.

[0835] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, the optional methods or optional examples can be arbitrarily combined, and can be arbitrarily combined with any steps of other embodiments or other examples.

[0836] Figure 5 is an interactive diagram of a communication method according to an embodiment of the present disclosure. As shown in Figure 5, the embodiment of the present disclosure relates to a communication method for a communication system including a terminal and a network device. The method includes at least one of the following:

[0837] Step 5101: The terminal determines the OCC sequence corresponding to the NPRACH.

[0838] Step 5102: The terminal determines the OCC multiplexing mode of the NPRACH.

[0839] Step 5103: The terminal sends the NPRACH based on the OCC sequence and the OCC multiplexing mode.

[0840] Step 5104: The network device determines the OCC sequence corresponding to the NPRACH.

[0841] Step 5105: The network device determines the OCC multiplexing mode of the NPRACH.

[0842] Step 5106: The network device receives the NPRACH based on the OCC sequence and the OCC multiplexing mode.

[0843] Optional implementations of steps 5101 to 5106 can be found in the above embodiments.

[0844] In some embodiments, the above method may include the method described in the above embodiments of the communication system side, the first device side, the network device side, etc., which will not be repeated here.

[0845] The communication method involved in the embodiment of the present disclosure may include at least one of steps 5101 to 5106. For example, step 5101 may be implemented as an independent embodiment, and step 5102 may be implemented as an independent embodiment, but the present invention is not limited thereto.

[0846] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, the optional methods or optional examples can be arbitrarily combined, and can be arbitrarily combined with any steps of other embodiments or other examples.

[0847] The following is an exemplary introduction to the above method.

[0848] Optional Example 1: NPRACH OCC Multiplexing Terminal Processing Flow

[0849] For NPRACH OCC multiplexing, consider at least one of the following processing flows:

[0850] NPRACH sequence generation→resource mapping→base band signal generation covering with OCC sequence value

[0851] For example, assuming that the OCC Sequence of UE#m is represented by Wm, the base band signal generation method is as follows, where j represents the j+1th value in the OCC Sequence#m corresponding to the symbol group.

[0852] NPRACH sequence generation (all 1 bit)→resource mapping→OCC covering to resources→base band signal generation

[0853] NPRACH sequence generation (all 1 bit)→OCC covering to NPRACH sequences→resource mapping→base band signal generation

[0854] OCC covering to NPRACH sequences, that is, assuming that NPRACH Sequence is SP, then SP(i)*Wm(j), where i represents the i-th symbol of NPRACH, and Wm(j) has the same meaning as above. It should be noted that, depending on the OCC multiplexing method (which will be introduced in the subsequent content), different symbols may cover the same or different values ​​in Wm.

[0855] NPRACH sequence generation with OCC sequence value→resource mapping→base band signal generation

[0856] In this method, it is assumed that symbol k in NPRACH symbol group i uses the j+1th value in OCC Sequence#m(Wm), where Sequence#m is the OCC sequence used by the mth user. Correspondingly, the NPRACH sequence corresponding to this symbol is expressed as: Wm(j).

[0857] Optionally: considering different subsequent OCC multiplexing modes, the NPRACH Sequence generation mode or the above-mentioned Wm(j) determination mode may be different accordingly.

[0858] Optional Example 2: NPRACH OCC multiplexing uses at least one of the following methods:

[0859] For NPRACH OCC multiplexing, consider time domain multiplexing. Specifically, OCC multiplexing can adopt at least one of the following methods:

[0860] Optional embodiment 1: using symbol-based OCC multiplexing solution

[0861] Further, consider the following different approaches:

[0862] Optional embodiment 1-1: Determine the OCC reuse pattern based on different symbols within a symbol group. Specifically, one possible method is as follows:

[0863] In this mode, the OCC length defaults to the number of symbols in a symbol group. Furthermore, different symbols in a symbol group cover different bits in an OCC sequence. For example, for preamble format 0 and preamble format 1 corresponding to frame structure type 1, there are 5 symbols in a symbol group. Accordingly, the OCC sequence length and the maximum number of multiplexed users are 5. Assuming that the OCC sequence of user m is represented by Wm(i) (i = 0, 1, ..., 4), the correspondence between the different bits of user m's OCC sequence and the different symbols in a symbol group is shown in Figure 2E. In addition, for preamble format 2, there are 3 symbols in a symbol group. The OCC sequence length and the maximum number of multiplexed users are 3.

[0864] Optional embodiment 1-2: Determine the OCC multiplexing pattern by combining multiple symbols of different symbol groups in an NPRACH transmission. Specifically, one possible method is as follows:

[0865] The following constraints exist between the number of OCC multiplexed users and the number of NPRACH symbols:

[0866] Mod(number of symbol groups per single NPRACH*symbols per symbol group,OCC length or number of OCC multiplexed users or maximum number of OCC multiplexed users)=0

[0867] The maximum number of OCC multiplexed users / OCC length can be determined by gNB configuration or protocol preset method. Different CE levels can have separate OCC lengths. At the same time, the number of OCC multiplexed users must meet the above constraints.

[0868] In addition, the correspondence between Wm(i) (where i = 0, ..., occ length - 1 or the number of occ multiplexed users - 1 or the maximum number of occ multiplexed users - 1) and the number of symbol groups (G) * symbols per group (N) is as follows:

[0869] Denote X = G*N. Furthermore, symbol x (x = 0, .., X-1) corresponds to Wm(j). Where j = x mod OCC length; or, j = floor(x / M) mod OCC length. Furthermore, X = M*OCC length*K, where M, OCC length, and K are all positive integers. M can be considered a block length. The same block covers the same OCC sequence value Wm(j). M can be configured by the gNB or determined by a preset protocol rule, for example, directly as a fixed value, or determined based on the number of symbol groups. For example, there is an association between M and the number of symbol groups, or between K and the number of symbol groups, or between M and OCC length, or between any two of the above four parameters. Or M = symbol length in a symbol group.

[0870] Optional embodiment 1-3: Combine symbols contained in multiple Symbol groups with different repetitions to perform OCC multiplexing. Specifically, one possible method is as follows:

[0871] The following constraints exist between the number of OCC multiplexed users and NPRACH symbols:

[0872] Mod(X=Number of repetitions*number of symbol groups per single NPRACH repetition*symbols per symbol Group,OCC length or number of OCC multiplexed users or maximum number of OCC multiplexed users)=0

[0873] The maximum number of OCC multiplexing users / OCC multiplexing users / OCC length can be determined by gNB configuration or protocol preset method. Different CE levels can have separate OCC lengths. At the same time, OCC multiplexing users must meet the above constraints. The protocol preset method is determined, such as the protocol directly presets the OCC length, or the protocol presets the correspondence between the OCC length and the number of repetitions, and further determines the OCC length by the number of repetitions.

[0874] In addition, the correspondence between Wm(i) and symbol x (x=0,..,X-1) is similar to that in method 1-2:

[0875] Denote X = G*N*number of repetitions. Furthermore, symbol x (x = 0, ..., X-1) corresponds to Wm(j). j = x mod OCC length; or, j = floor(x / M) mod OCC length. Furthermore, X = M*OCC length*K, where M, OCC length, and K are all positive integers. M can be considered a block length. The same block covers the same OCC sequence value Wm(j). M can be configured by the gNB or determined by pre-set protocol rules, for example, directly as a fixed value, or based on the number of symbol groups / number of repetitions. For example, there is an association between M and the number of symbol groups / number of repetitions / number of symbol groups within all repetitions / X, or between K and the number of symbol groups, between M and OCC length, or between at least two of any of the above parameters. Alternatively, M = the number of symbols in a symbol group, or M = the number of symbols in a repetition.

[0876] Optionally, for symbol-based time-domain OCC multiplexing schemes, the determination of the CP OCC sequence needs to be considered. For example, for optional example 1-1, the OCC sequence of the last symbol can also be covered by the CP. In this case, when designing the OCC code, consider cyclic shift codes or ZC sequences, that is, the code sequence can still maintain orthogonality with other sequences after cyclic shift. In addition, optionally, in this method, the code sequence length can be greater than the maximum number of multiplexed users, and the sequence cyclic shift Cv value can be greater than 1. Cv is configured by the gNB or determined according to pre-set protocol rules. For methods 1-2 and 1-3, except for the CP at the starting transmission position, the CPs at other positions participate in the calculation formula for the mapping between symbol x and Wm(i) and can also be considered as a symbol cover Wm(j). The first CP covers the OCC sequence value of the last symbol X-1. Similarly, a cyclic shift sequence can be selected as the OCC orthogonal code.

[0877] Optional embodiment 2: using the Symbol group-based OCC multiplexing solution

[0878] Optional embodiment 2-1: Determining the OCC reuse pattern based on the symbol groups included in a repetition

[0879] In this mode, OCC length / number of multiplexed OCC users / maximum number of multiplexed OCC users = number of symbol groups in a repetition, G. Based on this, the correspondence between Symbol Group i and value j (denote by Wm(j)) in OCC Sequence m is:

[0880] Symbol Group j corresponds to the OCC Sequence value j of user m, that is, Wm(j). In other words, every symbol (including CP) of Symbol Group j covers Wm(j).

[0881] Alternatively, the following relationship exists between OCC length / number of multiplexed users / maximum number of multiplexed users of OCC and the number of symbol groups G in a repetition:

[0882] Mod(G, OCC length / number of multiplexed OCC users / maximum number of multiplexed OCC users) = 0. In this mode, the OCC length can be determined based on the gNB configuration, for example, the gNB indicates the OCC length / maximum number of multiplexed OCC users / number of multiplexed OCC users through RRC / SIB signaling; it can also be determined based on protocol preset rules or preset values. Based on this, the correspondence between Symbol Group i and Wm(j) is:

[0883] Each symbol in symbol group i (optionally including CP) covers Wm(j), where j = i mod OCC length; or, j = floor(i / M) mod OCC length, where M and OCC length have the following relationship: M = G / OCC length / K, for example, K = 1, or M is configured or indicated by the gNB, and / or M is determined by a protocol preset value or preset rule, such as based on ephemeris information, or M = 1

[0884] Optional embodiment 2-2: Determining the OCC reuse pattern based on the symbol groups included in multiple repetitions

[0885] In this mode, the following constraints exist between the number of OCC multiplexed users / OCC length / maximum number of OCC multiplexed users (L) and the number of symbol groups A contained in multiple repetitions (A = number of repetitions * number of symbol groups per single NPRACH repetition):

[0886] Mod(A,L)=0

[0887] In this mode, the number of OCC multiplexed users / OCC length / maximum number of OCC multiplexed users (L) can be determined by protocol preset rules or a fixed value preset by the protocol. Optionally, different NPRACH formats / repetition times can have different L values, or L can be configured or indicated by the gNB.

[0888] Furthermore, the mapping relationship between Symbol Group i and Wm(j) is similar to that in 2-1 and will not be elaborated on here.

[0889] Optional embodiment 3: using repetition-based OCC multiplexing solution

[0890] Specifically, OCC multiplexing has the following design methods:

[0891] The following relationship exists between OCC length / maximum number of multiplexed users / number of multiplexed users L and repetition times Z: mod(Z,L)=0

[0892] In this mode, the number of OCC multiplexed users / OCC length / maximum number of OCC multiplexed users (L) can be determined by protocol preset rules or a fixed value preset by the protocol. Optionally, different L values ​​can be used for different repetition times, or L can be configured or indicated by the gNB, such as through SIB messages.

[0893] Furthermore, the value j in the covered OCC sequence m (m is the OCC sequence index determined by user H) on each symbol (optionally including CP) in repetition i, namely Wm(j), is determined as follows:

[0894] j = mod(i, L); or, j = floor(i, M) mod L, where M satisfies the following constraint: Z = M*L*K. M is determined in the same way as above, and the same Wm(j) is used for each M repetitions.

[0895] Optionally, different PRACH formats or different frame structure types can use different OCC multiplexing schemes.

[0896] Optional Example 3: The OCC Sequence is determined based on at least one of the following methods:

[0897] Determined based on the protocol preset table OCC Sequence table and / or gNB configuration / instruction. The protocol preset table can be an existing table or a new table, and there can be one or more tables. A possible protocol preset table is shown in Figures 2B-2D:

[0898] The protocol-preset sequence is determined based on the protocol-preset sequence generation method and / or gNB configuration / instruction. The protocol-preset sequence can be at least one of the following: Walsh sequence, Hamdard sequence, PN sequence, gold sequence, cyclic shift sequence, Zadoff-Chu sequence, etc. For example, a possible cyclic shift sequence is as follows:

[0899] sequence#0=[s(0),s(1),s(2),…s(k)], where k=0,…,M-1, s(k)=exp(j*2pi*k / M), where M is the code length. Furthermore, for the kth value of sequence#i, s(k)=s((k+i)modM). That is, first determine one of the sequences (for example, Sequence#0, with a sequence length of M). The remaining M-1 sequences can be obtained based on the cyclic shift of this sequence, thus constructing an orthogonal sequence.

[0900] Any two OCC sequences used by UEs that reuse the same time-frequency resources must satisfy at least one of the following characteristics:

[0901] Orthogonality between different OCC sequences

[0902] The cross-correlation between different OCC sequences is very low.

[0903] The embodiments of the present disclosure further provide an apparatus for implementing any of the above methods. For example, an apparatus is provided, comprising units or modules for implementing each step performed by a terminal in any of the above methods. For another example, another apparatus is provided, comprising units or modules for implementing each step performed by a network device (e.g., an access network device, a core network function node, a core network device, etc.) in any of the above methods.

[0904] It should be understood that the division of the various units or modules in the above device is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units or modules in the device may be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above-mentioned hardware circuits can be understood as one or more processors; for example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), which realizes the functions of some or all of the above units or modules by designing the logical relationship of the components in the circuit; for example, in another implementation, the above-mentioned hardware circuit can be realized by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the configuration file, thereby realizing the functions of some or all of the above units or modules. All units or modules of the above devices can be realized in the form of software called by the processor, or in the form of hardware circuits, or in part by the form of software called by the processor, and the rest by hardware circuits.

[0905] In the embodiment of the present disclosure, the processor is a circuit with signal processing capability. In one implementation, the processor can be a circuit with instruction reading and execution capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP); in another implementation, the processor can implement certain functions through the logical relationship of the hardware circuit, and the logical relationship of the above hardware circuit is fixed or reconfigurable, such as a hardware circuit implemented by a processor as an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and implementing the hardware circuit configuration can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0906] FIG6A is a schematic diagram of the structure of a terminal proposed in an embodiment of the present disclosure. As shown in FIG6A , it includes:

[0907] a processing module, configured to determine an OCC sequence corresponding to the NPRACH of the terminal;

[0908] The processing module is further configured to determine an OCC multiplexing mode of the NPRACH;

[0909] A transceiver module is configured to send the NPRACH based on the OCC sequence and the OCC multiplexing mode.

[0910] Optionally, the above-mentioned transceiver module is used to execute the steps related to "transmitting and receiving" executed by the terminal in any of the above methods, and the above-mentioned processing module is used to execute the steps related to "processing" executed by the terminal in any of the above methods.

[0911] FIG6B is a schematic diagram of the structure of the network device proposed in an embodiment of the present disclosure. As shown in FIG6B , it includes:

[0912] A processing module, configured to determine an OCC sequence corresponding to the NPRACH of the terminal;

[0913] The processing module is further configured to determine an OCC multiplexing mode of the NPRACH;

[0914] A transceiver module is configured to receive the NPRACH based on the OCC sequence and the OCC multiplexing mode.

[0915] Optionally, the above-mentioned transceiver module is used to execute the steps related to "transmitting and receiving" performed by the network device in any of the above methods, and the above-mentioned processing module is used to execute the steps related to "processing" performed by the network device in any of the above methods.

[0916] Figure 7A is a schematic diagram of the structure of a communication device 7100 proposed in an embodiment of the present disclosure. Communication device 7100 can be a network device (e.g., an access network device, a core network device, etc.), a terminal (e.g., a user device or the first device described above), a chip, a chip system, or a processor that supports a network device in implementing any of the above methods, or a chip, a chip system, or a processor that supports a terminal in implementing any of the above methods. Communication device 7100 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0917] As shown in Figure 7A, the communication device 7100 includes one or more processors 7101. The processor 7101 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute programs, and process program data. The processor 7101 is used to call instructions to enable the communication device 7100 to perform any of the above methods.

[0918] In some embodiments, the communication device 7100 further includes one or more memories 7102 for storing instructions. Optionally, all or part of the memories 7102 may be located outside the communication device 7100.

[0919] In some embodiments, the communication device 7100 further includes one or more transceivers 7103. When the communication device 7100 includes one or more transceivers 7103, the communication steps such as sending and receiving in the above method are performed by the transceiver 7103, and the other steps are performed by the processor 7101.

[0920] In some embodiments, a transceiver may include a receiver and a transmitter, which may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, and transceiver circuit may be used interchangeably; the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be used interchangeably; and the terms receiver, receiving unit, receiver, and receiving circuit may be used interchangeably.

[0921] Optionally, the communication device 7100 further includes one or more interface circuits 7104, which are connected to the memory 7102. The interface circuits 7104 may be configured to receive signals from the memory 7102 or other devices, and may be configured to send signals to the memory 7102 or other devices. For example, the interface circuits 7104 may read instructions stored in the memory 7102 and send the instructions to the processor 7101.

[0922] The communication device 7100 described in the above embodiment may be a network device or a terminal, but the scope of the communication device 7100 described in the present disclosure is not limited thereto, and the structure of the communication device 7100 may not be limited by FIG. 7a. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data or programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0923] 7B is a schematic diagram of the structure of a chip 7200 proposed in an embodiment of the present disclosure. If the communication device 7100 can be a chip or a chip system, please refer to the schematic diagram of the structure of the chip 7200 shown in FIG7B , but the present disclosure is not limited thereto.

[0924] The chip 7200 includes one or more processors 7201 , and the processor 7201 is used to call instructions so that the chip 7200 executes any of the above methods.

[0925] In some embodiments, chip 7200 further includes one or more interface circuits 7202, which are connected to memory 7203. Interface circuit 7202 can be used to receive signals from memory 7203 or other devices, and can be used to send signals to memory 7203 or other devices. For example, interface circuit 7202 can read instructions stored in memory 7203 and send the instructions to processor 7201. Optionally, the terms interface circuit, interface, transceiver pin, and transceiver are interchangeable.

[0926] In some embodiments, the chip 7200 further includes one or more memories 7203 for storing instructions. Alternatively, all or part of the memories 7203 may be located outside the chip 7200.

[0927] The present disclosure also proposes a storage medium having instructions stored thereon. When the instructions are executed on the communication device 7100, the communication device 7100 executes any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited thereto and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto and may also be a temporary storage medium.

[0928] The present disclosure also provides a program product, which, when executed by the communication device 7100, enables the communication device 7100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0929] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to perform any one of the above methods.

[0930] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented using software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer programs. When the computer program is loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present disclosure are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a high-density digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0931] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this disclosure.

[0932] Those skilled in the art will clearly understand that, for the 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.

[0933] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: Executed by a terminal, the method includes: Determine an orthogonal cover code OCC sequence corresponding to a narrowband physical random access channel NPRACH of the terminal; Determine an OCC multiplexing mode of the NPRACH; The NPRACH is sent based on the OCC sequence and the OCC multiplexing mode.

2. The method according to claim 1, wherein The determining the OCC multiplexing mode of the NPRACH includes: Determine a first length, where the first length is: a sequence length of an OCC sequence corresponding to the NPRACH; Determine an OCC multiplexing mode of the NPRACH based on the first length.

3. The method according to claim 2, wherein Determining the first length includes at least one of the following: Determining the first length based on a protocol preset; determining the first length based on a configuration of the network device; The first length is determined based on an indication from a network device.

4. The method according to claim 2 or 3, wherein: The determining of the first length includes: The first length is determined based on the number of symbols symbol of the NPRACH.

5. The method according to claim 4, wherein The determining the first length based on the number of symbols of the NPRACH includes: The first length is determined to be a first value, where the first value is: the total number of symbols in a symbol group of the NPRACH.

6. The method according to any one of claims 1 to 5, characterized in that: The determining the OCC multiplexing mode of the NPRACH includes: The OCC multiplexing mode is determined as follows: different sequence values ​​in the OCC sequence are respectively mapped to different symbols in the symbol group.

7. The method according to claim 5 or 6, wherein: Different symbol groups transmitted on the same NPRACH use the same OCC multiplexing mode and the same OCC sequence.

8. The method according to any one of claims 2 to 5, characterized in that: The first length satisfies the following condition: the total number of symbols in one NPRACH transmission is an integer multiple of the first length.

9. The method according to any one of claims 1 to 5 and 8, characterized in that: The determining the OCC multiplexing mode of the NPRACH includes: Numbering symbols in the NPRACH transmission once to obtain a symbol index; Numbering the sequence values ​​in the OCC sequence to obtain a sequence index; Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol corresponding to the symbol index "x1", where x1 and j satisfy at least one of the following conditions: First condition: j=x1 mod L; wherein L is the first length, and the mod function is a remainder function; the first condition is used to map one of the sequence values ​​to one symbol; The second condition: j=floor(x1 / M1) mod L; wherein the second condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbols; the M1 indicates the number of symbols to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

10. The method according to claim 9, wherein The M1 satisfies the following conditions: the product of the M1, L, and K1 is equal to the total number of symbols in one NPRACH transmission; wherein, the K1 indicates the number of repetition mappings of the OCC sequence in one NPRACH transmission; The M1 and / or K1 are provided by at least one of the following methods: Determining the M1 and / or K1 based on the network device configuration; Determine the M1 and / or K1 based on the protocol preset; Determine the M1 and / or K1 based on a first association relationship, where the first association relationship is: an association relationship between the number of symbol groups in one NPRACH transmission and the M1 and / or K1; Determine the M1 and / or K1 based on a second association relationship, where the second association relationship is: an association relationship between the first length and the M1 and / or K1; The M1 and / or K1 are determined based on a third association relationship, where the third association relationship is: an association relationship between the total number of symbols in a symbol group of the NPRACH and the M1 and / or K1.

11. The method according to any one of claims 5 to 10, wherein: Different repeated transmissions of the same NPRACH use the same OCC multiplexing mode and the same OCC sequence.

12. The method according to any one of claims 2 to 5, characterized in that: The first length satisfies the following conditions: the total number of symbols in N NPRACH transmissions is an integer multiple of the first length; and N is determined by the total number of repeated transmissions of the NPRACH.

13. The method according to any one of claims 1 to 5 and 12, wherein: The determining the OCC multiplexing mode of the NPRACH includes: Numbering symbols in the N NPRACH transmissions to obtain symbol indexes; Numbering the sequence values ​​in the OCC sequence to obtain a sequence index; Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol corresponding to the symbol index "x2", where x2 and j satisfy at least one of the following conditions: The third condition: j=x2 mod L; wherein L is the first length and the mod function is a remainder function; the third condition is used to map one of the sequence values ​​to one symbol; The fourth condition: j=floor(x2 / M1) mod L; wherein the fourth condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbols; M1 indicates the number of symbols to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

14. The method according to claim 12, wherein: The M1 satisfies the following condition: the product of the M1, L, and K2 is equal to the total number of symbols in the N NPRACH transmissions; wherein, the K2 indicates the number of repetition mappings of the OCC sequence in the N NPRACH transmissions; The M1 and / or K2 are in at least one of the following ways: Determining the M1 and / or K2 based on the network device configuration; Determine the M1 and / or K2 based on the protocol preset; Determine the M1 and / or K2 based on a fourth association relationship, where the fourth association relationship is: an association relationship between the number of symbol groups in one NPRACH transmission and the M1 and / or K2; Determine the M1 and / or K2 based on a fifth association relationship, where the fifth association relationship is: an association relationship between the first length and the M1 and / or K2; Determine the M1 and / or K2 based on a sixth association relationship, where the sixth association relationship is: an association relationship between the number of symbol groups in the N NPRACH transmissions and the M1 and / or K2; Determine the M1 and / or K2 based on a seventh association relationship, where the seventh association relationship is: an association relationship between a total number of symbols in the N NPRACH transmissions and the M1 and / or K2; The M1 and / or K2 are determined based on the eighth association relationship, and the eighth association relationship is: the relationship between N and the M1 and / or K2 Connection relationship.

15. The method according to claim 2 or 3, wherein: The determining of the first length includes: The first length is determined based on the number of symbol groups of the NPRACH.

16. The method according to claim 15, wherein The determining the first length based on the number of symbol groups of the NPRACH includes: Determine the first length as a second value, where the second value is: the total number of symbol groups transmitted in one NPRACH transmission.

17. The method according to any one of claims 1-3, 15, and 16, wherein: The determining the OCC multiplexing mode of the NPRACH includes: The OCC multiplexing mode is determined as follows: different sequence values ​​in the OCC sequence are respectively mapped to symbols of different symbol groups.

18. The method according to claim 16 or 17, wherein: Different repeated transmissions of the same NPRACH use the same OCC multiplexing mode and the same OCC sequence.

19. The method according to claim 2 or 3 or 15 or 16, wherein: The first length satisfies the following condition: the total number of symbol groups in one NPRACH transmission is an integer multiple of the first length.

20. The method according to any one of claims 1-3, 15, 16, and 19, wherein: The determining the OCC multiplexing mode of the NPRACH includes: Numbering a symbol group in the NPRACH transmission to obtain a symbol group index; Numbering the sequence values ​​in the OCC sequence to obtain a sequence index; Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol in the symbol group corresponding to the symbol group index "i1", where i1 and j satisfy at least one of the following conditions: Fifth condition: j=i1 mod L; wherein L is the first length and the mod function is a remainder function; the fifth condition is used to map one of the sequence values ​​to one symbol group; The sixth condition: j=floor(i1 / M2) mod L; wherein the sixth condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbol groups; M2 indicates the number of symbol groups to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

21. The method according to claim 20, wherein The product of M2, L, and K3 is equal to the total number of symbol groups in one NPRACH transmission; wherein K3 indicates the number of repeated mappings of the OCC sequence in one NPRACH transmission; The M2 and / or K3 are in at least one of the following ways: Determining the M2 and / or K3 based on the network device configuration; The M2 and / or K3 are determined based on protocol presets.

22. The method according to claim 20 or 21, wherein: Different repeated transmissions of the same NPRACH use the same OCC multiplexing mode and the same OCC sequence.

23. The method according to claim 2 or 3 or 15 or 16, wherein: The first length satisfies the following conditions: the total number of symbol groups in N NPRACH transmissions is an integer multiple of the first length; and N is determined by the total number of repeated transmissions of the NPRACH.

24. The method according to any one of claims 1-3, 15, 16, and 23, wherein: The determining the OCC multiplexing mode of the NPRACH includes: Numbering the symbol groups in the N NPRACH transmissions to obtain a symbol group index; Numbering the sequence values ​​in the OCC sequence to obtain a sequence index; Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol in the symbol group corresponding to the symbol group index "i2", where i2 and j satisfy at least one of the following conditions: Seventh condition: j=i2 mod L; wherein L is the first length, and the mod function is a remainder function; the seventh condition is used to map one of the sequence values ​​to one symbol group; The eighth condition: j=floor(x2 / M2)mod L; wherein the eighth condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbol groups; M2 indicates the number of symbol groups to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

25. The method of claim 24, wherein: The product of M2, L, and K4 is equal to the total number of symbol groups in the N NPRACH transmissions; wherein K4 indicates the number of repeated mappings of the OCC sequence in the N NPRACH transmissions; The M2 and / or K4 are provided by at least one of the following methods: Determining the M2 and / or K4 based on the network device configuration; The M2 and / or K4 are determined based on protocol presets.

26. The method according to claim 2 or 3, wherein: The determining of the first length includes: The first length is determined based on the number of repeated transmissions of the NPRACH.

27. The method according to claim 2, 3 or 26, wherein: The first length satisfies the following conditions: N is an integer multiple of the first length; and N is determined by the total number of repeated transmissions of the NPRACH.

28. The method according to claims 1-3, 26, and 27, wherein: The determining the OCC multiplexing mode of the NPRACH includes: Numbering the number of repeated transmissions of the NPRACH to obtain a number index; Numbering the sequence values ​​in the OCC sequence to obtain a sequence index; Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol of the NPRACH transmission corresponding to the number index "f", where f and j satisfy at least one of the following conditions: Ninth condition: j=f mod L; wherein L is the first length and the mod function is a remainder function; the ninth condition is used to map one sequence value to one NPRACH transmission; The tenth condition: j = floor(f / M3) mod L; wherein the tenth condition is used to enable one sequence value to be continuously mapped to multiple NPRACH transmissions; M3 indicates the number of NPRACH transmissions to which one sequence value is continuously mapped, and the floor function is a floor function.

29. The method of claim 28, wherein The product of M3, L, and K5 is equal to N; wherein K5 indicates the number of repetition mappings of the OCC sequence in the N NPRACH transmissions; The M3 and / or K5 are provided by at least one of the following methods: Determining the M3 and / or K5 based on the network device configuration; The M3 and / or K5 are determined based on protocol presets.

30. The method according to any one of claims 1 to 29, wherein: The determining of the OCC sequence corresponding to the NPRACH includes at least one of the following: Determining the OCC sequence based on a protocol preset table; Determining the OCC sequence based on a configuration of a network device; Determining the OCC sequence based on an indication from a network device; Determine the OCC sequence based on a protocol preset sequence generation method; The determined sequence length of the OCC sequence is the first length.

31. The method according to any one of claims 1 to 30, wherein: Different coverage enhancement CE levels of the NPRACH respectively correspond to first lengths, and the first lengths corresponding to different CE levels are the same or different; and / or The different formats of the NPRACH respectively correspond to a first length, and the first lengths corresponding to the different formats are the same or different; and / or The NPRACHs with different numbers of repeated transmissions respectively correspond to first lengths, and the first lengths corresponding to the NPRACHs with different numbers of repeated transmissions are the same or different.

32. The method according to any one of claims 1 to 31, wherein: The first length is greater than or equal to the number of multiplexed users.

33. The method of claim 32, wherein: The OCC sequence is a cyclic shift sequence, and the first length is greater than the number of multiplexed users.

34. The method according to any one of claims 1 to 33, wherein: The OCC sequences corresponding to different terminals on the same resource are orthogonal; and / or The mutual correlation between OCC sequences corresponding to different terminals on the same resource is less than a first threshold.

35. The method according to any one of claims 1 to 34, wherein: Each CP except the first cyclic prefix CP in the N repeated transmissions of the NPRACH is respectively mapped as a symbol to the sequence value of the OCC sequence.

36. The method according to any one of claims 1 to 35, wherein: Different CE levels of the NPRACH correspond to OCC multiplexing modes respectively, and the OCC multiplexing modes corresponding to different CE levels are the same or different; and / or The different formats of the NPRACH correspond to OCC multiplexing modes respectively, and the OCC multiplexing modes corresponding to the different formats are the same or different; and / or The NPRACHs with different repeated transmission times correspond to OCC multiplexing modes respectively, and the OCC multiplexing modes corresponding to the NPRACHs with different repeated transmission times are the same or different.

37. A communication method, characterized in that: Executed by a network device, the method includes: Determine the OCC sequence corresponding to the NPRACH of the terminal; Determine an OCC multiplexing mode of the NPRACH; The NPRACH is received based on the OCC sequence and the OCC multiplexing mode.

38. The method of claim 37, wherein: The determining the OCC multiplexing mode of the NPRACH includes: Determine a first length, where the first length is: a sequence length of an OCC sequence corresponding to the NPRACH; Determine an OCC multiplexing mode of the NPRACH based on the first length.

39. The method of claim 38, wherein The determining of the first length includes: The first length is determined based on protocol presets and / or autonomously by the network device.

40. The method according to claim 38 or 39, wherein The method further comprises: The first length is configured for the terminal.

41. The method according to any one of claims 38 to 40, wherein: The first length is a first value, and the first value is: the total number of symbols in a symbol group of the NPRACH.

42. The method according to any one of claims 37 to 41, wherein: The determining the OCC multiplexing mode of the NPRACH includes: The OCC multiplexing mode is determined as follows: different sequence values ​​in the OCC sequence are respectively mapped to different symbols in the symbol group.

43. The method according to claim 41 or 42, wherein Different symbol groups transmitted on the same NPRACH use the same OCC multiplexing mode and the same OCC sequence.

44. The method according to any one of claims 38 to 41, wherein: The first length satisfies the following condition: the total number of symbols in one NPRACH transmission is an integer multiple of the first length.

45. The method according to any one of claims 37 to 41 or 44, wherein: The determining the OCC multiplexing mode of the NPRACH includes: Numbering symbols in the NPRACH transmission once to obtain a symbol index; Numbering the sequence values ​​in the OCC sequence to obtain a sequence index; Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol corresponding to the symbol index "x1", where x1 and j satisfy at least one of the following conditions: First condition: j=x1 mod L; wherein L is the first length, and the mod function is a remainder function; the first condition is used to map one of the sequence values ​​to one symbol; The second condition: j=floor(x1 / M1) mod L; wherein the second condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbols; the M1 indicates the number of symbols to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

46. ​​The method of claim 45, wherein The M1 satisfies the following condition: the product of the M1, L, and K1 is equal to the total number of symbols in one NPRACH transmission; wherein the K1 indicates the number of repeated mappings of the OCC sequence in one NPRACH transmission.

47. The method according to any one of claims 41 to 46, wherein: Different repeated transmissions of the same NPRACH use the same OCC multiplexing mode and the same OCC sequence.

48. The method according to any one of claims 38 to 41, wherein: The first length satisfies the following conditions: the total number of symbols in N NPRACH transmissions is an integer multiple of the first length; and N is determined by the total number of repeated transmissions of the NPRACH.

49. The method according to any one of claims 37 to 41 or 48, wherein: The determining the OCC multiplexing mode of the NPRACH includes: Numbering symbols in the N NPRACH transmissions to obtain symbol indexes; Numbering the sequence values ​​in the OCC sequence to obtain a sequence index; Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol corresponding to the symbol index "x2", where x2 and j satisfy at least one of the following conditions: The third condition: j=x2 mod L; wherein L is the first length and the mod function is a remainder function; the third condition is used to map one of the sequence values ​​to one symbol; The fourth condition: j=floor(x2 / M1) mod L; wherein the fourth condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbols; M1 indicates the number of symbols to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

50. The method of claim 49, wherein The M1 satisfies the following condition: the product of the M1, L, and K2 is equal to the total number of symbols in the N NPRACH transmissions; wherein, the K2 indicates the number of repeated mappings of the OCC sequence in the N NPRACH transmissions.

51. The method according to any one of claims 38 to 40, wherein: The first length is a second value, and the second value is: the total number of symbol groups transmitted by the NPRACH once.

52. The method according to any one of claims 37 to 40 and 51, wherein: The determining the OCC multiplexing mode of the NPRACH includes: The OCC multiplexing mode is determined as follows: different sequence values ​​in the OCC sequence are respectively mapped to symbols of different symbol groups.

53. The method according to claim 51 or 52, wherein: Different repeated transmissions of the same NPRACH use the same OCC multiplexing mode and the same OCC sequence.

54. The method according to any one of claims 38 to 40 and 51, wherein: The first length satisfies the following condition: the total number of symbol groups in one NPRACH transmission is an integer multiple of the first length.

55. The method according to any one of claims 37-40, 51, and 54, wherein: The determining the OCC multiplexing mode of the NPRACH includes: Numbering a symbol group in the NPRACH transmission to obtain a symbol group index; Numbering the sequence values ​​in the OCC sequence to obtain a sequence index; Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol in the symbol group corresponding to the symbol group index "i1", where i1 and j satisfy at least one of the following conditions: Fifth condition: j=i1 mod L; wherein L is the first length and the mod function is a remainder function; the fifth condition is used to map one of the sequence values ​​to one symbol group; The sixth condition: j=floor(i1 / M2) mod L; wherein the sixth condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbol groups; M2 indicates the number of symbol groups to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

56. The method of claim 55, wherein: The product of M2, L, and K3 is equal to the total number of symbol groups in one NPRACH transmission; wherein K3 indicates the number of repeated mappings of the OCC sequence in one NPRACH transmission.

57. The method according to claim 55 or 56, wherein Different repeated transmissions of the same NPRACH use the same OCC multiplexing mode and the same OCC sequence.

58. The method according to any one of claims 38 to 40 and 51, wherein: The first length satisfies the following conditions: the total number of symbol groups in N NPRACH transmissions is an integer multiple of the first length; and N is determined by the total number of repeated transmissions of the NPRACH.

59. The method according to any one of claims 37-40, 51, and 58, wherein: The determining the OCC multiplexing mode of the NPRACH includes: Numbering the symbol groups in the N NPRACH transmissions to obtain a symbol group index; Numbering the sequence values ​​in the OCC sequence to obtain a sequence index; Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol in the symbol group corresponding to the symbol group index "i2", where i2 and j satisfy at least one of the following conditions: The seventh condition: j = i2 mod L; wherein L is the first length, and the mod function is a remainder function; the seventh condition is used to make One of the sequence values ​​is mapped onto a symbol group; The eighth condition: j=floor(x2 / M2)mod L; wherein the eighth condition is used to enable one of the sequence values ​​to be continuously mapped to multiple symbol groups; M2 indicates the number of symbol groups to which one of the sequence values ​​is continuously mapped, and the floor function is a floor function.

60. The method of claim 59, wherein The product of M2, L, and K4 is equal to the total number of symbol groups in the N NPRACH transmissions; wherein K4 indicates the number of repeated mappings of the OCC sequence in the N NPRACH transmissions.

61. The method according to any one of claims 38 to 40, wherein: The first length satisfies the following conditions: N is an integer multiple of the first length; and N is determined by the total number of repeated transmissions of the NPRACH.

62. The method according to any one of claims 37 to 40 and 61, wherein: The determining the OCC multiplexing mode of the NPRACH includes: Numbering the number of repeated transmissions of the NPRACH to obtain a number index; Numbering the sequence values ​​in the OCC sequence to obtain a sequence index; Map the sequence value corresponding to the sequence index "j" in the OCC sequence to the symbol of the NPRACH transmission corresponding to the number index "f", where f and j satisfy at least one of the following conditions: Ninth condition: j=f mod L; wherein L is the first length and the mod function is a remainder function; the ninth condition is used to map one sequence value to one NPRACH transmission; The tenth condition: j = floor(f / M3) mod L; wherein the tenth condition is used to enable one sequence value to be continuously mapped to multiple NPRACH transmissions; M3 indicates the number of NPRACH transmissions to which one sequence value is continuously mapped, and the floor function is a floor function.

63. The method of claim 62, wherein: The product of M3, L, and K5 is equal to N; wherein K5 indicates the number of repeated mappings of the OCC sequence in the N NPRACH transmissions.

64. The method according to any one of claims 37 to 63, wherein: The determining of the OCC sequence corresponding to the NPRACH includes at least one of the following: Determining the OCC sequence based on a protocol preset table; Determine the OCC sequence based on a protocol preset sequence generation method; The determined sequence length of the OCC sequence is the first length.

65. The method of claim 64, wherein: The method further comprises: The OCC sequence is configured and / or indicated to the terminal.

66. The method according to any one of claims 37 to 65, wherein: Different CE levels of the NPRACH respectively correspond to first lengths, and the first lengths corresponding to different CE levels are the same or different; and / or The different formats of the NPRACH respectively correspond to a first length, and the first lengths corresponding to the different formats are the same or different; and / or The NPRACHs with different numbers of repeated transmissions respectively correspond to first lengths, and the first lengths corresponding to the NPRACHs with different numbers of repeated transmissions are the same or different.

67. The method according to any one of claims 37 to 66, wherein: The first length is greater than or equal to the number of multiplexed users.

68. The method of claim 67, wherein The OCC sequence is a cyclic shift sequence, and the first length is greater than the number of multiplexed users.

69. The method according to any one of claims 37 to 68, wherein: The OCC sequences corresponding to different terminals on the same resource are orthogonal; and / or The mutual correlation between OCC sequences corresponding to different terminals on the same resource is less than a first threshold.

70. The method according to any one of claims 37 to 69, wherein: Each CP except the first CP in the N repeated transmissions of the NPRACH is respectively used as a symbol and mapped to the sequence value of the OCC sequence.

71. The method according to any one of claims 37 to 70, wherein: Different CE levels of the NPRACH correspond to OCC multiplexing modes respectively, and the OCC multiplexing modes corresponding to different CE levels are the same or different; and / or The different formats of the NPRACH correspond to OCC multiplexing modes respectively, and the OCC multiplexing modes corresponding to the different formats are the same or different; and / or The NPRACHs with different repeated transmission times correspond to OCC multiplexing modes respectively, and the OCC multiplexing modes corresponding to the NPRACHs with different repeated transmission times are the same or different.

72. A communication method, used in a communication system, the communication system comprising a terminal and a network device, the method comprising at least one of the following: The terminal determines an OCC sequence corresponding to the NPRACH of the terminal; The terminal determines an OCC multiplexing mode of the NPRACH; The terminal sends the NPRACH based on the OCC sequence and the OCC multiplexing mode; The network device determines an OCC sequence corresponding to the NPRACH; The network device determines an OCC multiplexing mode of the NPRACH; The network device receives the NPRACH based on the OCC sequence and the OCC multiplexing mode.

73. A terminal, characterized in that: include: a processing module, configured to determine an OCC sequence corresponding to the NPRACH of the terminal; The processing module is further configured to determine an OCC multiplexing mode of the NPRACH; A transceiver module is configured to send the NPRACH based on the OCC sequence and the OCC multiplexing mode.

74. A network device, characterized in that include: A processing module, configured to determine an OCC sequence corresponding to the NPRACH of the terminal; The processing module is further configured to determine an OCC multiplexing mode of the NPRACH; A transceiver module is configured to receive the NPRACH based on the OCC sequence and the OCC multiplexing mode.

75. A communication device, characterized in that include: one or more processors; A memory coupled to the processor, wherein instructions are stored in the memory, and when the instructions are executed by the processor, the communication device executes the method according to any one of claims 1 to 36 or claims 37 to 71.

76. A communication system, characterized in that It includes a terminal and a network device, wherein the terminal is configured to implement the method according to any one of claims 1 to 36, and the network device is configured to implement the method according to any one of claims 37 to 71.

77. A storage medium storing instructions, characterized in that: When the instructions are executed on a communication device, the communication device is caused to perform the method according to any one of claims 1 to 36 or claims 37 to 71.

Images