Wireless network access method, device, system and storage medium

Abstract

The present invention discloses a wireless network access method, apparatus, system and storage medium, including determining a system coverage radius according to system configuration information sent by a management station; determining a time-domain structure of an uplink synchronization signal according to an access parameter set, a cyclic prefix length and a guard time interval length obtained according to the system configuration information and the system coverage radius; obtaining a unique cyclic shift size according to the unique identification number of each terminal station; generating an access sequence for each terminal station according to the access parameter set and the unique cyclic shift size, and converting the access sequence after subcarrier mapping into a sequence time-domain signal; adding a cyclic prefix intercepted at the tail to the sequence time-domain signal to obtain an uplink synchronization signal corresponding to each terminal station, so that each terminal station performs wireless network access according to the corresponding uplink synchronization signal. It can uniformly and efficiently manage terminal stations, reduce the access delay of industrial wireless networks, and improve the reliability, robustness and flexibility of the operation of wireless access networks.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless networks, and in particular, to a wireless network access method, device, system, and storage medium. Background Art

[0002] With the rapid development of industrial wireless communication technology, the complexity of industrial wireless networks has increased day by day, and the requirements for integrity, efficiency, security, etc. have become increasingly strict. Terminal stations (TS) in industrial scenarios also have high requirements for low latency, high reliability, and multi-access performance. The development trend of intelligent and digital factories has forced traditional industrial networks to develop more rapidly towards smart industries, resulting in huge challenges in the development of wireless network access systems and their access methods.

[0003] Traditional wireless local area networks can access the system without relying on random access sequences. All TSs send media access request frames through the carrier sense multiple access with collision avoidance mechanism to complete system access. This method is easy to implement and does not require separate design at the physical layer. However, various media access request frames not only occupy more orthogonal frequency division multiplexing (OFDM) symbols, but also when the number of users is large, the increase in collision probability will cause the system efficiency to decrease, which has a huge negative impact on the low latency and high reliability performance in industrial networks.

[0004] The above content is only used to assist in understanding the technical solution of the present invention, and does not represent an admission that the above content is prior art. Summary of the Invention

[0005] The main purpose of the present invention is to provide a wireless network access method, device, system, and storage medium, aiming to solve the technical problems of high access delay and poor reliability in existing industrial wireless networks.

[0006] To achieve the above object, the present invention provides a wireless network access method, and the method includes the following steps:

[0007] Determine the system coverage radius according to the system configuration information issued by the management station;

[0008] Obtain an access parameter set, a cyclic prefix length, and a guard time interval length according to the system configuration information and the system coverage radius;

[0009] Determine the time domain structure of the uplink synchronization signal according to the access parameter set, the cyclic prefix length, and the guard time interval length;

[0010] Obtain the unique cyclic shift size corresponding to each terminal station according to the unique identification number of each terminal station;

[0011] Generate the access sequences of each terminal station according to the access parameter set and the unique cyclic shift size;

[0012] Perform subcarrier mapping on the access sequences, and convert the access sequences after subcarrier mapping into sequence time-domain signals;

[0013] Intercept a cyclic prefix at the tail of the sequence time-domain signal according to the cyclic prefix length;

[0014] Add the cyclic prefix to the sequence time-domain signal to obtain the uplink synchronization signals with the time-domain structure corresponding to each terminal station, so that each terminal station performs wireless network access according to the corresponding uplink synchronization signal.

[0015] Optionally, before determining the system coverage radius according to the system configuration information issued by the management station, it further includes:

[0016] Measure the propagation round-trip delay based on each system coverage radius, and measure the channel delay spread;

[0017] Set the cyclic prefix length of each system coverage radius to be greater than or equal to the sum of the propagation round-trip delay corresponding to each system coverage radius and the channel delay spread; and

[0018] Set the length of the guard time interval corresponding to each system coverage radius to be greater than or equal to the propagation round-trip delay corresponding to each system coverage radius.

[0019] Optionally, the obtaining the unique cyclic shift size corresponding to each terminal station according to the unique identification number of each terminal station includes:

[0020] Determine the base cyclic shift size and the sequence length according to the access parameter set;

[0021] Determine the unique cyclic shift size corresponding to each terminal station according to the unique identification number of each terminal station, the base cyclic shift size and the sequence length.

[0022] Optionally, the access parameter set includes the sequence length and the initial value for generating the sequence;

[0023] The generating the access sequences of each terminal station according to the access parameter set and the unique cyclic shift size includes:

[0024] Generate the access sequences of each terminal station through a sequence generation formula according to the sequence length, the initial value for generating the sequence and the unique cyclic shift size;

[0025] The sequence generation formula is:

[0026] x u,v(n + v), u ∈ {1,..., N ZC -1}, n = 0, 1..., N - 1

[0027] where (n + v) is modulo (N - 1) - operated to make it not exceed the sequence length of the generated access sequence.

[0028] In the formula, u is the initial value of the generated sequence, v is the unique cyclic shift size, and N zc is the sequence length, and N zc is less than or equal to the total number of sub - carriers.

[0029] Optionally, the access sequence of each terminal station is a ZC sequence, and the sequence lengths of the ZC sequence include 239, 113, and 59.

[0030] Optionally, the time - domain structure of the uplink synchronization signal is configured based on the sequence length of the ZC sequence, and the time - domain structure is configured as at least one of the following structures: 1 - symbol alignment format time - domain structure, 2 - symbol alignment format time - domain structure, preamble advance format time - domain structure, and CP1 filling format time - domain structure.

[0031] Optionally, the system coverage radius includes a first indoor basic coverage radius, a second indoor basic coverage radius, a first indoor enhanced coverage radius, a second indoor enhanced coverage radius, and an outdoor enhanced coverage radius. The first indoor basic coverage radius is less than the second indoor basic coverage radius, the second indoor basic coverage radius is less than the first indoor enhanced coverage radius, the first indoor enhanced coverage radius is less than the second indoor enhanced coverage radius, and the second indoor enhanced coverage radius is less than the outdoor enhanced coverage radius.

[0032] Optionally, if the system coverage radius is the first indoor basic coverage radius, the time - domain structure of the uplink synchronization signal consists of a first cyclic prefix length, a sequence length, and a first guard time interval length to form 1 OFDM symbol length.

[0033] Optionally, if the system coverage radius is the second indoor basic coverage radius, the time - domain structure of the uplink synchronization signal consists of a first cyclic prefix length, a sequence length, a first guard time interval length, and the CP1 length of the next symbol to form 1 OFDM symbol length plus the CP1 length of the next symbol.

[0034] Optionally, if the system coverage radius is the first indoor enhanced coverage radius, the time - domain structure of the uplink synchronization signal consists of a second cyclic prefix length, a sequence length, and a second guard time interval length to form 1 OFDM symbol length plus a preamble, where the second cyclic prefix length is greater than the first cyclic prefix length, and the second guard time interval length is greater than the first guard time interval length.

[0035] Optionally, when the system coverage radius is the second indoor enhancement radius, the time domain structure of the uplink synchronization signal consists of a second cyclic prefix length, a sequence length, a second guard time interval length, and a CP1 length of the next symbol, which is 1 OFDM symbol length plus the CP1 length of the next symbol plus a reserve amount.

[0036] Optionally, when the system coverage radius is the outdoor enhanced coverage radius, the time domain structure of the uplink synchronization signal consists of a third cyclic prefix length, a sequence length, and a third guard time interval length, which is 2 OFDM symbol lengths. The third cyclic prefix length is greater than the second cyclic prefix length, and the third guard time interval length is greater than the second guard time interval length.

[0037] Optionally, when the sequence length of the ZC sequence is 239, the subcarrier mapping method for the ZC sequence is non-insertion mapping;

[0038] When the sequence length of the ZC sequence is 113, the subcarrier mapping method for the ZC sequence is to insert 1 zero mapping;

[0039] When the sequence length of the ZC sequence is 59, the subcarrier mapping method for the ZC sequence is to insert 3 zero mappings.

[0040] In addition, to achieve the above object, the present invention also proposes a wireless network access device, which includes:

[0041] A radius determination module, configured to determine the system coverage radius according to the system configuration information sent by the management station;

[0042] A first acquisition module, configured to acquire an access parameter set, a cyclic prefix length, and a guard time interval length according to the system configuration information and the system coverage radius;

[0043] A structure determination module, configured to determine the time domain structure of the uplink synchronization signal according to the access parameter set, the cyclic prefix length, and the guard time interval length;

[0044] A second acquisition module, configured to acquire the unique cyclic shift size corresponding to each terminal station according to the unique identification number of each terminal station;

[0045] A generation module, configured to generate an access sequence for each terminal station according to the access parameter set and the unique cyclic shift size;

[0046] A subcarrier mapping module, configured to perform subcarrier mapping on the access sequence and convert the access sequence after subcarrier mapping into a sequence time domain signal;

[0047] A truncation module, configured to truncate a cyclic prefix at the tail of the sequence time domain signal according to the cyclic prefix length;

[0048] An adding module, configured to add the cyclic prefix to the sequence time-domain signal to obtain an uplink synchronization signal with the time-domain structure corresponding to each terminal station, so that each terminal station performs wireless network access according to the corresponding uplink synchronization signal.

[0049] In addition, to achieve the above object, the present invention further provides a wireless network access system, which includes: a memory, a processor, and a wireless network access program stored on the memory and executable on the processor, where the wireless network access program is configured to implement the steps of the wireless network access method as described above.

[0050] In addition, to achieve the above object, the present invention further provides a storage medium, on which a wireless network access program is stored, and when the wireless network access program is executed by a processor, it implements the steps of the wireless network access method as described above.

[0051] The present invention determines the system coverage radius according to the system configuration information issued by the management station; obtains an access parameter set, a cyclic prefix length, and a guard time interval length according to the system configuration information and the system coverage radius; determines the time-domain structure of the uplink synchronization signal according to the access parameter set, the cyclic prefix length, and the guard time interval length; obtains a unique cyclic shift size corresponding to each terminal station according to the unique identification number of each terminal station; generates an access sequence for each terminal station according to the access parameter set and the unique cyclic shift size; performs subcarrier mapping on the access sequence, and converts the access sequence after subcarrier mapping into a sequence time-domain signal; intercepts a cyclic prefix at the tail of the sequence time-domain signal according to the cyclic prefix length; adds the cyclic prefix to the sequence time-domain signal to obtain an uplink synchronization signal with the time-domain structure corresponding to each terminal station, so that each terminal station performs wireless network access according to the corresponding uplink synchronization signal. The system configuration information in the present invention can be updated according to specific industrial wireless network access scenarios, and the access function of terminal stations in the industrial wireless network is realized through configurable and updatable parameters, which can uniformly and efficiently manage terminal stations, reduce the access delay of the industrial wireless network, and improve the reliability, robustness, and flexibility of the wireless access network operation. Description of the Drawings

[0052] Figure 1 It is a schematic structural diagram of a wireless network access system in the hardware operating environment related to the embodiment solution of the present invention;

[0053] Figure 2 It is a schematic flowchart of an embodiment of the wireless network access method of the present invention;

[0054] Figure 3Schematic flowchart of another embodiment of the wireless network access method of the present invention;

[0055] FIG. 4(a) is a schematic diagram of subcarrier mapping 1 in an embodiment of the wireless network access method of the present invention;

[0056] FIG. 4(b) is a schematic diagram of subcarrier mapping 2 in an embodiment of the wireless network access method of the present invention;

[0057] FIG. 4(c) is a schematic diagram of subcarrier mapping 3 in an embodiment of the wireless network access method of the present invention;

[0058] FIG. 5(a) is a schematic diagram of the time-domain SEQ structure corresponding to subcarrier mapping 1 in an embodiment of the wireless network access method of the present invention;

[0059] FIG. 5(b) is a schematic diagram of the time-domain SEQ structure corresponding to subcarrier mapping 2 in an embodiment of the wireless network access method of the present invention;

[0060] FIG. 5(c) is a schematic diagram of the time-domain SEQ structure corresponding to subcarrier mapping 3 in an embodiment of the wireless network access method of the present invention;

[0061] FIG. 6(a) is a schematic diagram of the time-domain structure of the 1-symbol alignment format in an embodiment of the wireless network access method of the present invention;

[0062] FIG. 6(b) is a schematic diagram of the time-domain structure of the 2-symbol alignment format in an embodiment of the wireless network access method of the present invention;

[0063] Figure 7 It is a schematic diagram of the time-domain structure of the preamble advance format in an embodiment of the wireless network access method of the present invention;

[0064] Figure 8 It is a schematic diagram of the time-domain structure of the CP1 filling format in an embodiment of the wireless network access method of the present invention;

[0065] FIG. 9(a) is a schematic diagram of the time-domain structure of the 2-symbol alignment format when the ZC sequence length is 239 in an embodiment of the wireless network access method of the present invention;

[0066] FIG. 9(b) is a schematic diagram of the time-domain structure of the 1-symbol alignment format when the ZC sequence length is 239 in an embodiment of the wireless network access method of the present invention;

[0067] FIG. 9(c) is a schematic diagram of the time-domain structure of the 1-symbol alignment format + CP1 filling format when the ZC sequence length is 239 in an embodiment of the wireless network access method of the present invention;

[0068] FIG. 9(d) is a schematic diagram of the time-domain structure of the preamble advance format when the ZC sequence length is 239 in an embodiment of the wireless network access method of the present invention;

[0069] FIG. 9(e) is a schematic diagram of the time domain structure of the preamble advance format + CP1 filling format when the ZC sequence length is 239 in an embodiment of the wireless network access method of the present invention;

[0070] FIG. 10(a) is a schematic diagram of the time domain structure of the 2-symbol alignment format SEQ1 filling CP when the ZC sequence length is 113 in an embodiment of the wireless network access method of the present invention;

[0071] FIG. 10(b) is a schematic diagram of the time domain structure of the 2-symbol alignment format SEQ11 filling CP + CP1 filling format when the ZC sequence length is 113 in an embodiment of the wireless network access method of the present invention;

[0072] FIG. 10(c) is a schematic diagram of the time domain structure of the 1-symbol alignment format when the ZC sequence length is 113 in an embodiment of the wireless network access method of the present invention;

[0073] FIG. 10(d) is a schematic diagram of the time domain structure of the 1-symbol alignment format + CP1 filling when the ZC sequence length is 113 in an embodiment of the wireless network access method of the present invention;

[0074] FIG. 10(e) is a schematic diagram of the time domain structure of the 1-symbol alignment format SEQ11 filling CP when the ZC sequence length is 113 in an embodiment of the wireless network access method of the present invention;

[0075] FIG. 10(f) is a schematic diagram of the time domain structure of the 1-symbol alignment format SEQ11 filling CP + CP1 filling when the ZC sequence length is 113 in an embodiment of the wireless network access method of the present invention;

[0076] FIG. 10(g) is a schematic diagram of the time domain structure of the preamble advance format when the ZC sequence length is 113 in an embodiment of the wireless network access method of the present invention;

[0077] FIG. 10(h) is a schematic diagram of the time domain structure of the preamble advance format + CP1 filling when the ZC sequence length is 113 in an embodiment of the wireless network access method of the present invention;

[0078] FIG. 11(a) is a schematic diagram of the time domain structure of the 1-symbol alignment format when the ZC sequence length is 59 in an embodiment of the wireless network access method of the present invention;

[0079] FIG. 11(b) is a schematic diagram of the time domain structure of the 1-symbol alignment format + CP1 filling when the ZC sequence length is 59 in an embodiment of the wireless network access method of the present invention;

[0080] FIG. 11(c) is a schematic diagram of the time domain structure of the 1-symbol alignment format SEQ1 filling CP when the ZC sequence length is 59 in an embodiment of the wireless network access method of the present invention;

[0081] Figure 11(d) is a schematic diagram of the time domain structure of the SEQ1 filling CP + CP1 filling when the ZC sequence length is 59 in an embodiment of the wireless network access method of the present invention;

[0082] Figure 11(e) is a schematic diagram of the time domain structure of the reserve amount advance format when the ZC sequence length is 59 in an embodiment of the wireless network access method of the present invention;

[0083] Figure 11(f) is a schematic diagram of the time domain structure of the reserve amount advance format + CP1 filling format when the ZC sequence length is 59 in an embodiment of the wireless network access method of the present invention;

[0084] Figure 11(g) is a schematic diagram of the time domain structure of the 1-symbol alignment format SEQ1 filling CP and SEQ4 filling GP when the ZC sequence length is 59 in an embodiment of the wireless network access method of the present invention;

[0085] Figure 11(h) is a schematic diagram of the time domain structure of the 1-symbol alignment format SEQ1 filling CP and SEQ4 filling GP + CP1 filling format when the ZC sequence length is 59 in an embodiment of the wireless network access method of the present invention;

[0086] Figure 12 It is a schematic diagram of the time domain structure of the uplink synchronization signal corresponding to the first indoor basic coverage radius in an embodiment of the wireless network access method of the present invention;

[0087] Figure 13 It is a schematic diagram of the time domain structure of the uplink synchronization signal corresponding to the second indoor basic coverage radius in an embodiment of the wireless network access method of the present invention;

[0088] Figure 14 It is a schematic diagram of the time domain structure of the uplink synchronization signal corresponding to the first indoor enhanced coverage radius in an embodiment of the wireless network access method of the present invention;

[0089] Figure 15 It is a schematic diagram of the time domain structure of the uplink synchronization signal corresponding to the second indoor enhanced coverage radius in an embodiment of the wireless network access method of the present invention;

[0090] Figure 16 It is a schematic diagram of the time domain structure of the uplink synchronization signal corresponding to the outdoor enhanced coverage radius in an embodiment of the wireless network access method of the present invention;

[0091] Figure 17 It is a block diagram of the structure of the first embodiment of the wireless network access device of the present invention.

[0092] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0093] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0094] Referring to Figure 1 , Figure 1 FIG. is a schematic structural diagram of a wireless network access system for the hardware operating environment involved in the embodiment solution of the present invention.

[0095] Referring to Figure 1 , Figure 1 is a schematic diagram of the hardware structure of a wireless network access system. As Figure 1 shown, the wireless network access system may include: a communication bus 100, an acquisition interface 101, a processor 102, such as a central processing unit (CPU), a processing interface 103, a time-frequency domain converter 104, and a memory 105. The communication bus 100 is used to implement connection communication between these components. The acquisition interface 101 may include a wireless signal receiving device, an acquisition unit such as a computer. Optionally, the acquisition interface 101 may further include a standard wired interface and a wireless interface. The processing interface 103 may optionally include a standard wired interface and a wireless interface. The memory 105 may be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk memory. The memory 105 may optionally be a storage device independent of the aforementioned processor 102.

[0096] As Figure 1 shown, the memory 105 as a storage medium may include an operating system, an acquisition interface module, a processing interface module, and a wireless network access program.

[0097] In Figure 1 the wireless access network system shown, the communication bus 100 is mainly used to implement connection communication between components; the acquisition interface 101 is mainly used to connect a wireless signal receiving device to implement data communication with a management station (MS) background server; the processing interface 102 is mainly used to connect to a terminal station (TS) to perform data communication with the terminal station; the processor 102 and the memory 105 in the wireless access network system of the present invention may be arranged in the wireless access network system, and the wireless access network system calls the wireless network access program stored in the memory 105 through the processor 102 and executes the wireless network access method provided by the embodiment of the present invention.

[0098] The embodiment of the present invention provides a wireless network access method. Referring to Figure 2 , Figure 2Schematic diagram of a process of an embodiment of the wireless network access method of the present invention.

[0099] In this embodiment, the wireless network access method includes the following steps:

[0100] Step S10: Determine the system coverage radius according to the system configuration information sent by the management station.

[0101] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication, and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device, a wireless network access system, etc. that can implement the above functions. Hereinafter, a wireless network access device is taken as an example to illustrate this embodiment and the following embodiments.

[0102] It can be understood that the system configuration information can be information for parameter configuration of the wireless network access system; the system coverage radius can be read from the system configuration information. For example, the system coverage radius includes the first indoor basic coverage radius, the second indoor basic coverage radius, the first indoor enhanced coverage radius, etc.

[0103] Step S20: Obtain an access parameter set, a cyclic prefix length, and a guard time interval length according to the system configuration information and the system coverage radius.

[0104] In this embodiment, the corresponding access parameter set, cyclic prefix length, and guard time interval length can be obtained according to the system configuration information. The access parameter set can include the sequence length, the initial value of the base cyclic shift size generation sequence, etc.; the cyclic prefix length and the guard time interval length correspond to the system coverage radius. For example: there is a mapping relationship between each system coverage radius and the cyclic prefix length and the guard time interval length. The corresponding cyclic prefix length and guard time interval length can be obtained through the above mapping relationship according to the system coverage radius determined by the system configuration information; among them, the cyclic prefix can be represented by CP (Cyclic Prefix), and the guard time interval can be represented by GP (Guard Period).

[0105] Step S30: Determine the time domain structure of the uplink synchronization signal according to the access parameter set, the cyclic prefix length, and the guard time interval length.

[0106] It can be understood that the uplink synchronization signal can be represented by USS (Uplink Synchronization Signal); if the system coverage radius changes, the time domain structure of the uplink synchronization signal can also change accordingly to adapt to the changed system coverage radius.

[0107] Step S40: Obtain the unique cyclic shift size corresponding to each terminal station according to the unique identification number of each terminal station.

[0108] It can be understood that the unique identification number can be an identification number that can uniquely distinguish each terminal station. For example, the unique identification number can be a media access address, a physical address, or other identification numbers; the unique cyclic shift size can be a unique cyclic shift size in the network calculated based on the unique identification number of the terminal station.

[0109] Step S50: Generate the access sequence of each terminal station according to the access parameter set and the unique cyclic shift size;

[0110] Step S60: Perform subcarrier mapping on the access sequence, and convert the access sequence after subcarrier mapping into a sequence time-domain signal.

[0111] It can be understood that the subcarrier mapping methods include: no-insertion mapping, sequence insertion of one zero mapping, and sequence insertion of multiple zero mappings. Specifically, which of the above methods is used for subcarrier mapping can be determined according to the sequence length in the access parameter set.

[0112] Step S70: Intercept the cyclic prefix at the tail of the sequence time-domain signal according to the cyclic prefix length;

[0113] Step S80: Add the cyclic prefix to the sequence time-domain signal to obtain the uplink synchronization signal with the time-domain structure corresponding to each terminal station, so that each terminal station performs wireless network access according to the corresponding uplink synchronization signal.

[0114] In an example, determine the system coverage radius according to the system configuration information issued by the management station. The system coverage radius includes the first indoor basic coverage radius, the second indoor basic coverage radius, the first indoor enhanced coverage radius, the second indoor enhanced coverage radius, and the outdoor enhanced coverage radius. Determine the access parameter set according to the system configuration information. The access parameter set includes the sequence length, the base cyclic shift size, and the initial value of the generated sequence. Obtain the cyclic prefix length and the guard time interval length corresponding to the system coverage radius by looking up a table. Determine the time-domain structure of the uplink synchronization signal corresponding to the system coverage radius according to the sequence length, the cyclic prefix length, and the guard time interval length. Calculate the unique cyclic shift size of each terminal station according to the unique identification number of each terminal station. Generate the access sequence of each terminal station according to the initial value of the generated sequence and the unique cyclic shift size of each terminal station. The access sequence of each terminal station can be generated by formula (1):

[0115] x u，v (n + v), u ∈ {1,..., N zc -1}, n = 0, 1,..., N - 1 (Formula 1)

[0116] Among them, perform a modulo operation on (n + v) with respect to (N - 1) so that it does not exceed the sequence length of the generated access sequence.

[0117] In the formula, u is the initial value of the generated sequence; v is the unique cyclic shift size; v is a positive integer less than N, N is the sequence length, and N is less than or equal to the total number of subcarriers.

[0118] Determine the mapping method for subcarrier mapping according to the sequence length, and perform subcarrier mapping on the access sequences of each terminal station through this mapping method. Convert the access sequence after subcarrier mapping into a sequence time-domain signal. Intercept the cyclic prefix at the tail of the sequence time-domain signal according to the cyclic prefix length, and add the cyclic prefix to the sequence time-domain signal to obtain the uplink synchronization signal with the above time-domain structure, perform subsequent processing on the uplink synchronization signal, and send it to the management station.

[0119] Furthermore, in order to make the time-domain structure of the uplink synchronization signal match the system coverage radius, before the step S10, it further includes: measuring the round-trip propagation delay based on each system coverage radius, and measuring the channel delay spread; setting the cyclic prefix length of each system coverage radius to be greater than or equal to the sum of the round-trip propagation delay corresponding to each system coverage radius and the channel delay spread; and setting the protection time interval length corresponding to each system coverage radius to be greater than or equal to the round-trip propagation delay corresponding to each system coverage radius.

[0120] In this embodiment, measure the channel delay spread, and measure the round-trip propagation delay based on each system coverage radius; set the cyclic prefix length of each system coverage radius to be greater than or equal to the sum of the corresponding round-trip propagation delay and the channel delay spread; set the protection time interval length of each system coverage radius to be greater than or equal to the corresponding round-trip propagation delay.

[0121] In this embodiment, the system coverage radius is determined according to the system configuration information sent by the management station; an access parameter set, a cyclic prefix length, and a guard time interval length are obtained according to the system configuration information and the system coverage radius; the time-domain structure of the uplink synchronization signal is determined according to the access parameter set, the cyclic prefix length, and the guard time interval length; the unique cyclic shift size corresponding to each terminal station is obtained according to the unique identification number of each terminal station; access sequences for each terminal station are generated according to the access parameter set and the unique cyclic shift size; subcarrier mapping is performed on the access sequences, and the access sequences after subcarrier mapping are converted into sequence time-domain signals; a cyclic prefix is intercepted at the tail of the sequence time-domain signal according to the cyclic prefix length; the cyclic prefix is added to the sequence time-domain signal to obtain the uplink synchronization signal with the time-domain structure corresponding to each terminal station, so that each terminal station performs wireless network access according to the corresponding uplink synchronization signal. The system configuration information in this embodiment can be updated according to specific industrial wireless network access scenarios, and the access function of terminal stations in the industrial wireless network is realized through configurable and updatable parameters, which can uniformly and efficiently manage terminal stations, reduce the access delay of the industrial wireless network, and improve the reliability, robustness, and flexibility of the wireless access network operation.

[0122] In some embodiments, refer to Figure 3 , Figure 3 which is a schematic flowchart of an embodiment of the wireless network access method of the present invention.

[0123] Based on the above embodiment, in this embodiment, the step S40 includes:

[0124] Step S401: Determine the base cyclic shift size and the sequence length according to the access parameter set.

[0125] In this embodiment, the base cyclic shift size and the sequence length can be obtained from the access parameter set.

[0126] Step S402: Determine the unique cyclic shift size corresponding to each terminal station according to the unique identification number of each terminal station, the base cyclic shift size, and the sequence length.

[0127] In one example, the base cyclic shift size and the sequence length are obtained from the access parameter set, and the unique cyclic shift size corresponding to each terminal station is calculated through formula (2) according to the base cyclic shift size, the sequence length, and the unique cyclic shift size. Formula (2) can be represented by the following formula:

[0128] v = m × k (Formula 2)

[0129] In the formula, and v is the unique cyclic shift size, ID is the unique identification number, k is the base cyclic shift size, and N ZC is the sequence length.

[0130] Further, in order to generate the access sequences of each terminal station, the access parameter set includes the sequence length and the initial value for generating the sequence, and the step S50 includes: generating the access sequences of each terminal station through a sequence generation formula according to the sequence length, the initial value for generating the sequence, and the unique cyclic shift size; the sequence generation formula can refer to formula (1).

[0131] In this embodiment, the base cyclic shift size and the sequence length are determined according to the access parameter set; the unique cyclic shift size corresponding to each terminal station is determined according to the unique identification number of each terminal station, the base cyclic shift size, and the sequence length. The flexibility of industrial wireless network access is improved.

[0132] In some embodiments, the access sequences of each terminal station are ZC sequences, and the sequence lengths of the ZC sequences include 239, 113, and 59.

[0133] Further, in order to improve the flexibility of industrial wireless network access, if the sequence length of the ZC sequence is 239, the subcarrier mapping method for the ZC sequence is non-insertion mapping; if the sequence length of the ZC sequence is 113, the subcarrier mapping method for the ZC sequence is inserting 1 zero mapping; if the sequence length of the ZC sequence is 59, the subcarrier mapping method for the ZC sequence is inserting 3 zero mappings.

[0134] In an example, the subcarrier mapping methods for the ZC sequence include: subcarrier mapping 1 - non-insertion mapping, subcarrier mapping 2 - inserting 1 zero mapping, and subcarrier mapping 3 - inserting 3 zero mappings. The time domain of the ZC sequence is represented by SEQ, and the time domain length of the ZC sequence is represented by T SEQ ; among them, the ZC sequence length corresponding to subcarrier mapping 1 is 239, the ZC sequence length corresponding to subcarrier mapping 2 is 113, and the ZC sequence length corresponding to subcarrier mapping 3 is 59; Figures 4(a) to 4(c) are the schematic diagrams of the above three subcarrier mapping methods. Fig. 4(a) is the schematic diagram of subcarrier mapping 1, Fig. 4(b) is the schematic diagram of subcarrier mapping 2, and Fig. 4(c) is the schematic diagram of subcarrier mapping 3, where N gp= 8, k = 120; The above three subcarrier mapping methods correspond to three structures of SEQ in the time domain. Inserting zeros in the frequency domain is equivalent to repeating in the time domain. The time-domain SEQ structure corresponding to subcarrier mapping 1 is shown in Fig. 5(a), the time-domain SEQ structure corresponding to subcarrier mapping 2 is shown in Fig. 5(b), and the time-domain SEQ structure corresponding to subcarrier mapping 3 is shown in Fig. 5(c). Since 1 zero is inserted in the frequency domain, there are two repeated segments in the time-domain SEQ structure shown in Fig. 5(b); since 3 zeros are inserted in the frequency domain, there are four repeated segments in the time-domain structure shown in Fig. 5(c).

[0135] Further, in order to improve the flexibility of industrial wireless network access, the time-domain structure of the uplink synchronization signal is configured based on the sequence length of the ZC sequence, and the time-domain structure is configured as at least one of the following structures: 1-symbol alignment format time-domain structure, 2-symbol alignment format time-domain structure, preamble advance format time-domain structure, and CP1 filling format time-domain structure.

[0136] It can be understood that the 1-symbol alignment format time-domain structure and the 2-symbol alignment format time-domain structure can be collectively referred to as the symbol alignment format time-domain structure. The 1-symbol alignment format time-domain structure can be referred to Fig. 6(a), the 2-symbol alignment format time-domain structure can be referred to Fig. 6(b), the preamble advance format time-domain structure can be referred to Figure 7 , and the CP1 filling format time-domain structure can be referred to Figure 8 , where CP1 is the CP length of the next OFDM symbol; the 1-symbol alignment format time-domain structure, 2-symbol alignment format time-domain structure, preamble advance format time-domain structure, and CP1 filling format time-domain structure can be selectively combined according to the sequence length of the ZC sequence.

[0137] In an example, for ZC sequences with sequence lengths of 59, 113, and 239, three specific configuration cases are provided based on the time-domain structures under the frame structures shown in Figs. 6 to 8. The configuration parameters can be referred to Table 1:

[0138] Table 1

[0139]

[0140] In Table 2, Y indicates including the corresponding configuration, and N indicates not including the corresponding configuration.

[0141] In an example, Figures 9(a) to 9(e)Schematic diagram of the time domain structure when the length of the ZC sequence is 239. Fig. 9(a) is the schematic diagram of the time domain structure in the 2-symbol alignment format when the length of the ZC sequence is 239. Fig. 9(b) is the schematic diagram of the time domain structure in the 1-symbol alignment format when the length of the ZC sequence is 239. Fig. 9(c) is the schematic diagram of the time domain structure in the 1-symbol alignment format + CP1 filling format when the length of the ZC sequence is 239. Fig. 9(d) is the schematic diagram of the time domain structure in the prepended guard period format when the length of the ZC sequence is 239. Fig. 9(e) is the schematic diagram of the time domain structure in the prepended guard period format + CP1 filling format when the length of the ZC sequence is 239; Figures 10(a) to 10(h) Schematic diagram of the time domain structure when the length of the ZC sequence is 113. In the time domain structures of Fig. 10(a), Fig. 10(b), Fig. 10(e) and Fig. 10(f), SEQ11 acts as the CP in the USS. Fig. 10(a) is the schematic diagram of the time domain structure in the 2-symbol alignment format with SEQ1 filling the CP when the length of the ZC sequence is 113. Fig. 10(b) is the schematic diagram of the time domain structure in the 2-symbol alignment format with SEQ11 filling the CP + CP1 filling format when the length of the ZC sequence is 113. Fig. 10(c) is the schematic diagram of the time domain structure in the 1-symbol alignment format when the length of the ZC sequence is 113. Fig. 10(d) is the schematic diagram of the time domain structure in the 1-symbol alignment format + CP1 filling when the length of the ZC sequence is 113. Fig. 10(e) is the schematic diagram of the time domain structure in the 1-symbol alignment format with SEQ11 filling the CP when the length of the ZC sequence is 113. Fig. 10(f) is the schematic diagram of the time domain structure in the 1-symbol alignment format with SEQ11 filling the CP + CP1 filling when the length of the ZC sequence is 113. Fig. 10(g) is the schematic diagram of the time domain structure in the prepended guard period format when the length of the ZC sequence is 113. Fig. 10(h) is the schematic diagram of the time domain structure in the prepended guard period format + CP1 filling when the length of the ZC sequence is 113; Figures 11(a) to 11(f)Schematic diagram of the time domain structure when the length of the ZC sequence is 59. In the time domain structures shown in FIGS. 11(c) and 11(d), SEQ1 serves as the CP in the USS. In the time domain structures shown in FIGS. 11(g) and 11(h), SEQ1 serves as the CP in the USS and SEQ4 serves as the GP in the USS. FIG. 11(a) is a schematic diagram of the time domain structure of the 1-symbol alignment format when the length of the ZC sequence is 59. FIG. 11(b) is a schematic diagram of the time domain structure of the 1-symbol alignment format + CP1 padding when the length of the ZC sequence is 59. FIG. 11(c) is a schematic diagram of the time domain structure of the 1-symbol alignment format with SEQ1 filling the CP when the length of the ZC sequence is 59. FIG. 11(d) is a schematic diagram of the time domain structure of the 1-symbol alignment format with SEQ1 filling the CP + CP1 padding when the length of the ZC sequence is 59. FIG. 11(e) is a schematic diagram of the time domain structure of the reserve quantity advance format when the length of the ZC sequence is 59. FIG. 11(f) is a schematic diagram of the time domain structure of the reserve quantity advance format + CP1 padding format when the length of the ZC sequence is 59. FIG. 11(g) is a schematic diagram of the time domain structure of the 1-symbol alignment format with SEQ1 filling the CP and SEQ4 filling the GP when the length of the ZC sequence is 59. FIG. 11(h) is a schematic diagram of the time domain structure of the 1-symbol alignment format with SEQ1 filling the CP and SEQ4 filling the GP + CP1 padding format when the length of the ZC sequence is 59.

[0142] In this embodiment, the sequence length can be configured corresponding to the system coverage radius, and the time domain structure matching the system coverage radius is configured based on the sequence length, which can improve the utilization rate of wireless resources while meeting the low-latency requirements in industrial scenarios.

[0143] In some embodiments, the system coverage radius includes a first indoor basic coverage radius, a second indoor basic coverage radius, a first indoor enhanced coverage radius, a second indoor enhanced coverage radius, and an outdoor enhanced coverage radius. The first indoor basic coverage radius is less than the second indoor basic coverage radius. The second indoor basic coverage radius is less than the first indoor enhanced coverage radius. The first indoor enhanced coverage radius is less than the second indoor enhanced coverage radius. The second indoor enhanced coverage radius is less than the outdoor enhanced coverage radius.

[0144] It can be understood that the system coverage radius is not limited to the first indoor basic coverage radius, the second indoor basic coverage radius, the first indoor enhanced coverage radius, the second indoor enhanced coverage radius, and the outdoor enhanced coverage radius. Other coverage radii can be set according to specific industrial application scenarios, and this embodiment does not limit this here.

[0145] Furthermore, in order to improve the utilization rate of wireless resources while meeting the access requirements of the terminal station, if the system coverage radius is the first indoor basic coverage radius, the time domain structure of the uplink synchronization signal consists of a first cyclic prefix length, a sequence length, and a first guard time interval length to form the length of 1 OFDM symbol.

[0146] In one example, the length N of the ZC sequence is determined according to the set of access parameters ZC , the CP length T CP and the GP length T GP , where N ZC ≤N Data , N ZC has three choices according to the coverage radius N ZC ∈{59, 113, 239}. T CP is greater than or equal to the sum of the round-trip propagation delay and the channel delay spread of the first indoor basic coverage radius. T GP is greater than or equal to the round-trip propagation delay of the first indoor basic coverage radius. The time-domain length of the ZC sequence is represented by T SEQ , and the time-domain structure of the uplink synchronization signal corresponding to the first indoor basic coverage radius can be referred to Figure 12 , and this time-domain structure is composed of T CP , T SEQ and T GP to form the length of 1 OFDM symbol.

[0147] Furthermore, in order to improve the utilization rate of wireless resources while meeting the access requirements of the terminal station, if the system coverage radius is the second indoor basic coverage radius, the time-domain structure of the uplink synchronization signal is composed of the first cyclic prefix length, the sequence length, the first guard time interval length, and the CP1 length of the next symbol to form the length of 1 OFDM symbol plus the CP1 length of the next symbol.

[0148] In one example, the time-domain structure of the uplink synchronization signal corresponding to the second indoor basic coverage radius can be referred to Figure 13 , and the time-domain structure of the uplink synchronization signal corresponding to the second indoor basic coverage radius is composed of the first cyclic prefix length T CP , the time-domain length T of the ZC sequence SEQ , the first guard time interval length T GP and the CP1 length T of the next symbol CP1 to form 1 OFDM symbol plus the CP1 length of the next symbol, where the CP1 length of one symbol is the CP length of the next OFDM symbol, and by T CP1 the service radius can be increased on the basis of the first indoor basic coverage radius to reach the second indoor basic coverage radius.

[0149] Further, in order to improve the utilization rate of radio resources while meeting the access requirements of the terminal station, if the system coverage radius is the first indoor enhanced coverage radius, the time domain structure of the uplink synchronization signal consists of a second cyclic prefix length, a sequence length, and a second guard time interval length, forming 1 OFDM symbol length plus a reserve amount. The second cyclic prefix length is greater than the first cyclic prefix length, and the second guard time interval length is greater than the first guard time interval length.

[0150] In one example, the time domain structure of the uplink synchronization signal corresponding to the first indoor enhanced coverage radius can be referred to Figure 14 , and the time domain structure of the uplink synchronization signal corresponding to the first indoor enhanced coverage radius consists of a second cyclic prefix length T CP2 , the time domain length T of the ZC sequence SEQ , and a second guard time interval length T GP2 , forming 1 OFDM symbol length plus a reserve amount. This reserve amount is obtained by the time length advanced from the previous GP symbol.

[0151] Further, in order to improve the utilization rate of radio resources while meeting the access requirements of the terminal station, if the system coverage radius is the second indoor enhanced radius, the time domain structure of the uplink synchronization signal consists of a second cyclic prefix length, a sequence length, a second guard time interval length, and the CP1 length of the next symbol, forming 1 OFDM symbol length plus the CP1 length of the next symbol plus a reserve amount.

[0152] In one example, the time domain structure of the uplink synchronization signal corresponding to the second indoor enhanced coverage radius can be referred to Figure 15 , and the time domain structure of the uplink synchronization signal corresponding to the second indoor enhanced coverage radius consists of a second cyclic prefix length T CP2 , the time domain length T of the ZC sequence SEQ , a second guard time interval length T GP2 , and the CP1 length T of the next symbol CP1 , forming 1 OFDM symbol length plus the CP1 length of the next symbol plus a reserve amount. This reserve amount is obtained by the time length advanced from the previous GP symbol.

[0153] In some embodiments, if the system coverage radius is the outdoor enhanced coverage radius, the time domain structure of the uplink synchronization signal consists of a third cyclic prefix length, a sequence length, and a third guard time interval length, forming 2 OFDM symbol lengths. The third cyclic prefix length is greater than the second cyclic prefix length, and the third guard time interval length is greater than the second guard time interval length.

[0154] In one example, the time domain structure of the uplink synchronization signal corresponding to the outdoor enhanced coverage radius can be referred to Figure 16, the time domain structure of the uplink synchronization signal corresponding to the outdoor enhanced coverage radius consists of the third cyclic prefix length T CP3 , the ZC sequence time domain length T SEQ and the third guard time interval length T GP3 to form the length of 2 OFDM symbols.

[0155] In one embodiment, assuming that the physical channel has a bandwidth of 20M, the inverse fast Fourier transform (IFFT) is used, and the IFFT length N IFFT = 256, where the number of useful data subcarriers is N Data = 240, the guard subcarriers on both sides are N gp = 8, and the number of DC subcarriers is N NULL = 3. The sequence is a ZC sequence, and the initial value of the generated sequence is the root value of the ZC sequence. Each ZC sequence occupies the entire 20M bandwidth.

[0156] It should be noted that when the bandwidth is 20M and NIFFT = 256, the Nzc length can be 59, 113, or 239. However, under different bandwidths and different NIFFT lengths, the Nzc length may be different, as long as the subcarrier mapping length condition is satisfied. The present invention only gives the optimal sequence length under the 20M bandwidth setting, and other bandwidths are not elaborated in this embodiment.

[0157] The system coverage radius determined according to the system configuration information issued by the management station is the first indoor basic coverage radius. The ZC sequence length N ZC , CP length T CP and GP length T GP are determined according to the access parameter set, where N ZC ≤ N Data , N ZC has three choices according to the coverage radius N ZC ∈ {59, 113, 239}. T CP is greater than or equal to the sum of the round-trip propagation delay and the channel delay spread of the first indoor basic coverage radius. T GP is greater than or equal to the round-trip propagation delay of the first indoor basic coverage radius. The USS time domain structure is determined according to the system coverage radius; the root value of the ZC sequence and the base cyclic shift size are determined; where the root value is u ∈ {1,..., N ZC - 1}. The root value of the ZC sequence and the base cyclic shift size are system default parameters, and can also be obtained from the high layer. Among them, the base cyclic shift size can vary with the coverage radius and the ZC sequence length. Assuming that the system design coverage radius is less than or equal to 1000 meters, the base cyclic shift size can be determined based on Table 2. Table 2 is a schematic table of the base cyclic shift size values under different coverage radii:

[0158] Table 2

[0159]

[0160] Determine the unique identification number of the terminal station, calculate the unique cyclic shift size corresponding to the terminal station according to the unique identification number and the determined base cyclic shift size through formula (2), and generate the ZC sequence corresponding to each terminal station with the above USS time domain structure according to the initial value of the generated sequence and the unique cyclic shift size. The ZC sequence can be generated through formula (3).

[0161]

[0162] Perform subcarrier mapping on the ZC sequence according to the sequence length of the ZC sequence, perform IFFT transformation on the mapped sequence to the time domain, and add the CP with the corresponding length to obtain the USS; the IFFT length N IFFT = 256, perform 256-point IFFT transformation on the ZC sequence of the generated terminal station. The added CP is added in front of the time domain signal of the ZC sequence after IFFT transformation, and the CP is obtained by intercepting the tail of the time domain signal of the ZC sequence after subcarrier mapping; perform subsequent processing on the USS and send it to the MS.

[0163] It should be noted that traditional wireless local area networks satisfy short-distance wireless communication. In fact, on the one hand, it is difficult to meet the access requirements of terminal stations and the access performance of management stations in a larger range within the industry, especially the outdoor coverage radius. While mobile communication LTE and 5G NR systems are oriented to mobile communication scenarios with a relatively large coverage radius, which brings more waste of resources.

[0164] In this embodiment, by flexibly configuring the access parameter set, CP, and GP, the access requirements for different coverage radii can be met. In addition, compared with traditional wireless local area networks and mobile communication LTE and 5G NR, which occupy more wireless resources, the access of 1 - 2 OFDM time domain symbols in this embodiment greatly improves the delay performance of the wireless access network.

[0165] In addition, an embodiment of the present invention also proposes a storage medium, on which a wireless network access program is stored. When the wireless network access program is executed by a processor, the steps of the wireless network access method as described above are implemented.

[0166] Refer to Figure 17 , Figure 17 which is the structural block diagram of the first embodiment of the wireless network access device of the present invention.

[0167] As Figure 17 shown, the wireless network access device proposed by the embodiment of the present invention includes:

[0168] A radius determination module 10, configured to determine a system coverage radius according to system configuration information sent by a management station;

[0169] A first acquisition module 20, configured to acquire an access parameter set, a cyclic prefix length, and a guard time interval length according to the system configuration information and the system coverage radius;

[0170] A structure determination module 30, configured to determine a time domain structure of an uplink synchronization signal according to the access parameter set, the cyclic prefix length, and the guard time interval length;

[0171] A second acquisition module 40, configured to acquire a unique cyclic shift size corresponding to each terminal station according to a unique identification number of each terminal station;

[0172] A generation module 50, configured to generate an access sequence for each terminal station according to the access parameter set and the unique cyclic shift size;

[0173] A subcarrier mapping module 60, configured to perform subcarrier mapping on the access sequence and convert the access sequence after subcarrier mapping into a sequence time domain signal;

[0174] A truncation module 70, configured to truncate a cyclic prefix at the tail of the sequence time domain signal according to the cyclic prefix length;

[0175] An addition module 80, configured to add the cyclic prefix to the sequence time domain signal to obtain an uplink synchronization signal with the time domain structure corresponding to each terminal station, so that each terminal station performs wireless network access according to the corresponding uplink synchronization signal.

[0176] This embodiment determines the system coverage radius according to the system configuration information sent by the management station; obtains an access parameter set, a cyclic prefix length, and a guard time interval length according to the system configuration information and the system coverage radius; determines the time-domain structure of the uplink synchronization signal according to the access parameter set, the cyclic prefix length, and the guard time interval length; obtains the unique cyclic shift size corresponding to each terminal station according to the unique identification number of each terminal station; generates the access sequence of each terminal station according to the access parameter set and the unique cyclic shift size; performs subcarrier mapping on the access sequence, and converts the access sequence after subcarrier mapping into a sequence time-domain signal; intercepts a cyclic prefix at the tail of the sequence time-domain signal according to the cyclic prefix length; adds the cyclic prefix to the sequence time-domain signal to obtain the uplink synchronization signal with the time-domain structure corresponding to each terminal station, so that each terminal station performs wireless network access according to the corresponding uplink synchronization signal. The system configuration information in this embodiment can be updated according to the specific industrial wireless network access scenario, and the access function of the terminal station in the industrial wireless network is realized through configurable and updatable parameters, which can uniformly and efficiently manage the terminal station, reduce the access delay of the industrial wireless network, and improve the reliability, robustness, and flexibility of the wireless access network operation.

[0177] Based on the first embodiment of the above wireless network access device of the present invention, a second embodiment of the wireless network access device of the present invention is proposed.

[0178] In this embodiment, the radius determination module 10 is further configured to measure the round-trip propagation delay based on each system coverage radius, and measure the channel delay spread; set the cyclic prefix length of each system coverage radius to be greater than or equal to the sum of the round-trip propagation delay corresponding to each system coverage radius and the channel delay spread; and set the guard time interval length corresponding to each system coverage radius to be greater than or equal to the round-trip propagation delay corresponding to each system coverage radius.

[0179] The second acquisition module 40 is further configured to determine a base cyclic shift size and a sequence length according to the access parameter set; determine the unique cyclic shift size corresponding to each terminal station according to the unique identification number of each terminal station, the base cyclic shift size, and the sequence length.

[0180] The generation module 50 is further configured to generate the access sequence of each terminal station according to the sequence length, the initial value of the generated sequence, and the unique cyclic shift size through a sequence generation formula; the sequence generation formula is:

[0181] x u,v (n + v), u ∈ {1,..., N ZC -1}, n = 0, 1..., N - 1

[0182] Among them, perform a modulo operation on (n + v) with respect to (N - 1) to make it not exceed the sequence length of the generated access sequence.

[0183] In the formula, u is the initial value of the generated sequence, v is the unique cyclic shift size, and N zc is the sequence length, and N zc is less than or equal to the total number of subcarriers; the access parameter set includes the sequence length and the initial value of the generated sequence.

[0184] For other embodiments or specific implementation manners of the wireless network access device of the present invention, reference may be made to the above method embodiments, which will not be elaborated herein.

[0185] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or system. Without more limitations, the element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or system including the element.

[0186] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages and disadvantages of the embodiments.

[0187] Through the description of the above embodiments, those skilled in the art can clearly understand that the above embodiment methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation manner. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product is stored in a storage medium (such as a read-only memory / random access memory, magnetic disk, optical disk), and includes several instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0188] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A wireless network access method, characterized in that, The method includes: Determining a system coverage radius according to system configuration information sent by a management station; Obtaining an access parameter set, a cyclic prefix length, and a guard time interval length according to the system configuration information and the system coverage radius; Determining a time domain structure of an uplink synchronization signal according to the access parameter set, the cyclic prefix length, and the guard time interval length; Obtaining a unique cyclic shift size corresponding to each terminal station according to the unique identification number of each terminal station; Generating an access sequence for each terminal station according to the access parameter set and the unique cyclic shift size; Performing subcarrier mapping on the access sequence, and converting the access sequence after subcarrier mapping into a sequence time domain signal; Intercepting a cyclic prefix at the tail of the sequence time domain signal according to the cyclic prefix length; Adding the cyclic prefix to the sequence time domain signal to obtain an uplink synchronization signal with the time domain structure corresponding to each terminal station, so that each terminal station performs wireless network access according to the corresponding uplink synchronization signal.

2. The method according to claim 1, characterized in that, Before determining the system coverage radius according to the system configuration information sent by the management station, it further includes: Measuring a propagation round-trip delay based on each system coverage radius, and measuring a channel delay spread; Setting the cyclic prefix length of each system coverage radius to be greater than or equal to the sum of the propagation round-trip delay corresponding to each system coverage radius and the channel delay spread; and Setting the guard time interval length corresponding to each system coverage radius to be greater than or equal to the propagation round-trip delay corresponding to each system coverage radius.

3. The method according to claim 1, characterized in that The obtaining a unique cyclic shift size corresponding to each terminal station according to the unique identification number of each terminal station includes: Determining a base cyclic shift size and a sequence length according to the access parameter set; Determining a unique cyclic shift size corresponding to each terminal station according to the unique identification number of each terminal station, the base cyclic shift size, and the sequence length.

4. The method according to claim 1, wherein The access parameter set includes a sequence length and an initial value for generating a sequence; The generating an access sequence for each terminal station according to the access parameter set and the unique cyclic shift size includes: Generating an access sequence for each terminal station according to the sequence length, the initial value for generating the sequence, and the unique cyclic shift size.

5. The method according to any one of claims 1 to 4, characterized in that The access sequence of each terminal station is a ZC sequence, and the sequence lengths of the ZC sequence include 239, 113, and 59.

6. The method according to claim 5, wherein The time domain structure of the uplink synchronization signal is configured based on the sequence length of the ZC sequence, and the time domain structure is configured as at least one of the following structures: a 1-symbol alignment format time domain structure, a 2-symbol alignment format time domain structure, a preamble advance format time domain structure, and a CP1 filling format time domain structure.

7. The method according to any one of claims 1 to 4, characterized in that The system coverage radius includes a first indoor basic coverage radius, a second indoor basic coverage radius, a first indoor enhanced coverage radius, a second indoor enhanced coverage radius, and an outdoor enhanced coverage radius. The first indoor basic coverage radius is less than the second indoor basic coverage radius, the second indoor basic coverage radius is less than the first indoor enhanced coverage radius, the first indoor enhanced coverage radius is less than the second indoor enhanced coverage radius, and the second indoor enhanced coverage radius is less than the outdoor enhanced coverage radius.

8. The method according to claim 7, wherein If the system coverage radius is the first indoor basic coverage radius, the time-domain structure of the uplink synchronization signal consists of a first cyclic prefix length, a sequence length, and a first guard time interval length to form one OFDM symbol length.

9. The method according to claim 7, wherein If the system coverage radius is the second indoor basic coverage radius, the time-domain structure of the uplink synchronization signal consists of a first cyclic prefix length, a sequence length, a first guard time interval length, and the length of the next symbol CP1 to form one OFDM symbol length plus the length of the next symbol CP1.

10. The method according to claim 7, characterized in that, If the system coverage radius is the first indoor enhanced coverage radius, the time-domain structure of the uplink synchronization signal consists of a second cyclic prefix length, a sequence length, and a second guard time interval length to form one OFDM symbol length plus a reserve.

11. The method according to claim 7, wherein When the system coverage radius is the second indoor enhanced radius, the time-domain structure of the uplink synchronization signal consists of a second cyclic prefix length, a sequence length, a second guard time interval length, and the CP1 length of the next symbol to form one OFDM symbol length plus the length of the next symbol CP1 plus a reserve.

12. The method according to claim 7, wherein If the system coverage radius is the outdoor enhanced coverage radius, the time-domain structure of the uplink synchronization signal consists of a third cyclic prefix length, a sequence length, and a third guard time interval length to form two OFDM symbol lengths.

13. The method according to claim 5, wherein If the sequence length of the ZC sequence is 239, the subcarrier mapping method for the ZC sequence is non-insertion mapping; If the sequence length of the ZC sequence is 113, the subcarrier mapping method for the ZC sequence is to insert one zero mapping; If the sequence length of the ZC sequence is 59, the subcarrier mapping method for the ZC sequence is to insert three zero mappings.

14. A wireless network access device, characterized in that, The device includes: A radius determination module for determining the system coverage radius according to the system configuration information sent by the management station; A first acquisition module for acquiring an access parameter set, a cyclic prefix length, and a guard time interval length according to the system configuration information and the system coverage radius; A structure determination module for determining the time-domain structure of the uplink synchronization signal according to the access parameter set, the cyclic prefix length, and the guard time interval length; A second acquisition module for acquiring the unique cyclic shift size corresponding to each terminal station according to the unique identification number of each terminal station; A generation module for generating the access sequence of each terminal station according to the access parameter set and the unique cyclic shift size; A subcarrier mapping module for performing subcarrier mapping on the access sequence and converting the access sequence after subcarrier mapping into a sequence time-domain signal; A truncation module for truncating the cyclic prefix at the tail of the sequence time-domain signal according to the cyclic prefix length; An addition module for adding the cyclic prefix to the sequence time-domain signal to obtain the uplink synchronization signal with the time-domain structure corresponding to each terminal station, so that each terminal station can perform wireless network access according to the corresponding uplink synchronization signal.

15. A wireless network access system, characterized in that, The system includes: a memory, a processor, and a wireless network access program stored on the memory and executable on the processor, the wireless network access program being configured to implement the steps of the wireless network access method according to any one of claims 1 to 13.

16. A storage medium, characterized in that, A wireless network access program is stored on the storage medium, and when the wireless network access program is executed by a processor, the steps of the wireless network access method according to any one of claims 1 to 13 are implemented.

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