Communication method, device, system, and storage medium

Abstract

The application discloses a communication method, device, system and storage medium, and relates to the technical field of communication. The communication method comprises the following steps: determining a transmission period and a resource mapping mode of a synchronization signal and a physical broadcast channel (PBCH) signal; and transmitting the synchronization signal based on the transmission period and the resource mapping mode of the synchronization signal, wherein the synchronization signal and the PBCH signal are independently transmitted. By separately transmitting the synchronization signal and the PBCH signal, the occupied amount of transmission resources can be reduced, and the performance of a communication system can be improved.

Description

Communication methods, devices, systems and storage media Technical Field

[0001] This disclosure relates to the field of communication technology, and more specifically, to a communication method, device, system, and storage medium. Background Technology

[0002] In mobile communication networks, before a UE can transmit data with the network, it needs to connect to the network through an initial access procedure. This initial access procedure can be implemented using a Synchronization Signal Block (SSB). The SSB includes the Primary Synchronization Signal (PSS), the Secondary Synchronization Signal (SSS), and the Physical Broadcast Channel (PBCH). When the SSB is transmitted as a whole, it may consume significant resources, resulting in waste.

[0003] Summary of the Invention

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

[0005] A first aspect of this disclosure provides a communication method, the method being executed by a network device, the method comprising:

[0006] Determine the transmission period of the synchronization signal and the resource mapping method;

[0007] Based on the transmission period and resource mapping method of the synchronization signal, the synchronization signal is transmitted;

[0008] The synchronization signals include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS); the synchronization signals are transmitted independently of the physical broadcast channel (PBCH) signal.

[0009] A second aspect of this disclosure provides a communication method, the method being executed by a terminal, the method comprising:

[0010] Obtain the transmission period and resource mapping method of the synchronization signal;

[0011] Based on the transmission period and resource mapping method of the synchronization signal, the synchronization signal is received;

[0012] The synchronization signals include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS); the synchronization signals are transmitted independently of the physical broadcast channel (PBCH) signal.

[0013] A third aspect of this disclosure provides a network device, including:

[0014] The first processing module is used to determine the transmission period of the synchronization signal and the resource mapping method;

[0015] The first transceiver module is used to send the synchronization signal based on the transmission period and resource mapping method of the synchronization signal;

[0016] The synchronization signals include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS); the synchronization signals are transmitted independently of the physical broadcast channel (PBCH) signal.

[0017] A fourth aspect of this disclosure provides a terminal, including:

[0018] The second transceiver module is used to acquire the transmission period and resource mapping method of the synchronization signal; and to receive the synchronization signal based on the transmission period and resource mapping method of the synchronization signal.

[0019] The synchronization signals include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS); the synchronization signals are transmitted independently of the physical broadcast channel (PBCH) signal.

[0020] A fifth aspect of this disclosure provides a communication device, including:

[0021] One or more processors;

[0022] The terminal is used to execute the optional implementation of the first aspect described above.

[0023] A sixth aspect of this disclosure provides a communication device, including:

[0024] One or more processors;

[0025] The network device is used to perform an optional implementation of the second aspect described above.

[0026] A seventh aspect of this disclosure provides a communication system including a terminal and a network device, wherein the terminal is used to implement the method described in the optional embodiments of the second aspect, and the network device is used to implement the method described in the optional embodiments of the first aspect.

[0027] According to an eighth aspect of the present disclosure, a computer-readable storage medium is provided that stores executable instructions which are loaded and executed by the processor to implement the method described in the optional embodiments of the first or second aspect.

[0028] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0029] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0030] Figure 1a is a schematic diagram of a wireless communication system according to an exemplary embodiment;

[0031] Figure 1b is a schematic diagram of the structure of the SSB shown in an embodiment of this disclosure;

[0032] Figure 1c is a schematic diagram of the airspace beam for transmitting SSB according to an embodiment of this disclosure;

[0033] Figure 1d is a schematic diagram illustrating the periodic transmission of SSB according to an embodiment of this disclosure;

[0034] Figure 2 is a flowchart illustrating a communication method according to an exemplary embodiment;

[0035] Figure 3a is a schematic diagram of the signal transmission cycle shown in an embodiment of this disclosure;

[0036] Figure 3b is a schematic diagram of the signal transmission cycle shown in an embodiment of this disclosure;

[0037] Figure 3c is a schematic diagram illustrating the mapping of signals on time-domain resources according to an embodiment of this disclosure;

[0038] Figure 4a is a flowchart illustrating the communication method according to an embodiment of this disclosure;

[0039] Figure 4b is a flowchart illustrating the communication method according to an embodiment of this disclosure;

[0040] Figure 5a is a schematic diagram of the signal transmission cycle shown in an embodiment of the present disclosure;

[0041] Figure 5b is a schematic diagram illustrating the resource mapping relationship of signals according to an embodiment of this disclosure;

[0042] Figure 6a is a schematic diagram of the structure of the network device proposed in an embodiment of this disclosure;

[0043] Figure 6b is a schematic diagram of the structure of the terminal proposed in an embodiment of this disclosure;

[0044] Figure 7a is a schematic diagram of the structure of the communication device proposed in an embodiment of this disclosure;

[0045] Figure 7b is a schematic diagram of the chip structure proposed in an embodiment of this disclosure. Detailed Implementation

[0046] This disclosure provides communication methods, devices, communication systems, and storage media.

[0047] In a first aspect, embodiments of this disclosure provide a communication method, which is executed by a network device, the method comprising:

[0048] Determine the transmission period of the synchronization signal and the resource mapping method;

[0049] Based on the transmission period and resource mapping method of the synchronization signal, the synchronization signal is transmitted;

[0050] The synchronization signals include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS); the synchronization signals are transmitted independently of the physical broadcast channel (PBCH) signal.

[0051] In the above embodiments, by sending the synchronization signal and the PBCH signal separately, the amount of transmission resources occupied can be reduced, thereby improving the performance of the communication system.

[0052] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0053] Determine the transmission period and resource mapping method of the PBCH signal;

[0054] The PBCH signal is transmitted based on the transmission period and resource mapping method of the PBCH signal.

[0055] In conjunction with some embodiments of the first aspect, in some embodiments, the transmission period of the synchronization signal is different from the transmission period of the PBCH signal; or, the transmission period of the PBCH signal is N times the transmission period of the synchronization signal, wherein at least one synchronization signal previously transmitted by the PBCH signal corresponds to the PBCH signal, and N is an integer greater than or equal to 1.

[0056] In the above embodiments, the relationship between the transmission periods of the synchronization signal and the PBCH signal can determine whether there is a correspondence between them. Thus, after downlink synchronization is achieved based on the synchronization signal, the master information block (MIB) can be obtained more conveniently based on the correspondence.

[0057] In conjunction with some embodiments of the first aspect, in some embodiments, the correspondence is determined based on at least one of the following:

[0058] Based on the first indication information included in the at least one synchronization signal, the first indication information is used to indicate the PBCH signal associated with the synchronization signal;

[0059] Based on the second indication information included in the PBCH signal, it is determined that the second indication information is used to indicate the synchronization signal associated with the PBCH signal, and the associated synchronization signal is a synchronization signal among the at least one synchronization signal.

[0060] In the above embodiments, the indication information carried in the signal can accurately determine whether there is a correspondence between the synchronization signal and the PBCH signal.

[0061] In conjunction with some embodiments of the first aspect, in some embodiments, the resource mapping method of the synchronization signal includes a time-domain resource mapping method, wherein the time-domain resource mapping method includes at least one of the following:

[0062] The number of symbols occupied by the PSS is the same as the number of symbols occupied by the SSS;

[0063] The number of symbols occupied by the PSS is different from the number of symbols occupied by the SSS;

[0064] The number of symbols occupied by the PSS is adjacent to the number of symbols occupied by the SSS;

[0065] The symbol occupied by the PSS precedes the symbol occupied by the SSS;

[0066] The symbol occupied by the PSS follows the symbol occupied by the SSS;

[0067] The symbols occupied by the PSS are repeatedly mapped on the time-domain resources;

[0068] The symbols occupied by the SSS are repeatedly mapped on time-domain resources.

[0069] In conjunction with some embodiments of the first aspect, in some embodiments, the resource mapping method of the synchronization signal includes a frequency domain resource mapping method, wherein the frequency domain resource mapping method includes at least one of the following:

[0070] The number of resource units occupied by the PSS is the same as the number of resource units occupied by the SSS;

[0071] The number of resource units occupied by the PSS is different from the number of resource units occupied by the SSS;

[0072] The resource units occupied by the PSS are repeatedly mapped on the frequency domain resources, and there is a first number of resource units between two adjacent repeated PSSs.

[0073] The resource units occupied by the SSS are repeatedly mapped on the frequency domain resources, and there is a second number of resource units between two adjacent repeated SSSs.

[0074] Wherein, the first quantity is the same as or different from the second quantity.

[0075] In the above embodiments, downlink synchronization in the time and frequency domains can be achieved more quickly by repeatedly mapping resources.

[0076] In conjunction with some embodiments of the first aspect, in some embodiments, the resource mapping method of the synchronization signal and the PBCH signal includes at least one of the following:

[0077] The synchronization signal and the PBCH signal are independently mapped in the time domain, and the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are not continuous. The first two symbols occupied by the PBCH signal carry the same information.

[0078] The synchronization signal and the PBCH signal are independently mapped in the frequency domain resources, and frequency division multiplexing on the same time domain resources is not supported.

[0079] The synchronization signal and the PBCH signal are associated and mapped in the time domain resources, and the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are consecutive to each other. The symbols occupied by the synchronization signal are all before the symbols occupied by the PBCH signal. The PBCH signal occupying the first symbol is mapped in the frequency domain resources. The resource units occupied by the PBCH signal are part of the resource units in the first symbol. The resource units occupied by the PBCH signal are repeatedly mapped until all resource units in the first symbol are occupied. The first symbol is any symbol occupied by the PBCH signal.

[0080] The synchronization signal and the PBCH signal are associated and mapped in the time domain, and the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are discontinuous. Specifically, the first two symbols occupied by the PBCH signal carry the same information.

[0081] Wherein, the synchronization signal and the PBCH signal are associated and mapped in the time domain resources, and the transmission period of the PBCH signal is N times the transmission period of the synchronization signal, where N is an integer greater than or equal to 2.

[0082] In the above embodiments, the resource mapping of the synchronization signal and the PBCH signal can be independent of each other or related, thereby meeting the need to reduce transmission resource consumption in more application scenarios.

[0083] In conjunction with some embodiments of the first aspect, in some embodiments,

[0084] The transmission of the synchronization signal and resource mapping are independent of the transmission of the PBCH signal.

[0085] In the above embodiments, the transmission of synchronization signals and resource mapping are independent of the transmission of PBCH, making the transmission of synchronization signals more flexible and achieving energy saving while meeting the requirements of low resource consumption.

[0086] In conjunction with some embodiments of the first aspect, some embodiments further include:

[0087] Send first information to the terminal, the first information including: the transmission period and resource mapping method of the synchronization signal, and / or, the transmission period and resource mapping method of the PBCH signal.

[0088] In the above embodiments, after determining the transmission period and resource mapping method of the synchronization signal and PBCH signal, the terminal can be notified so that the terminal can detect the synchronization signal and / or PBCH signal more accurately.

[0089] Secondly, embodiments of this disclosure provide a communication method, which is executed by a terminal, and the method includes:

[0090] Obtain the transmission period and resource mapping method of the synchronization signal;

[0091] Based on the transmission period and resource mapping method of the synchronization signal, the synchronization signal is received;

[0092] The synchronization signals include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS); the synchronization signals are transmitted independently of the physical broadcast channel (PBCH) signal.

[0093] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0094] Obtain the transmission period and resource mapping method of the PBCH signal;

[0095] The PBCH signal is received based on the transmission period and resource mapping method of the PBCH signal.

[0096] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0097] Receive first information sent by the network device, the first information including: the transmission period and resource mapping method of the synchronization signal, and / or, the transmission period and resource mapping method of the PBCH signal;

[0098] Based on the first information, obtain the transmission period and resource mapping method of the synchronization signal, and / or the transmission period and resource mapping method of the PBCH signal.

[0099] In conjunction with some embodiments of the second aspect, in some embodiments, the transmission period of the synchronization signal is different from the transmission period of the PBCH signal; or,

[0100] The transmission period of the PBCH signal is N times the transmission period of the synchronization signal, wherein at least one synchronization signal transmitted before the PBCH signal corresponds to the PBCH signal, and N is an integer greater than or equal to 1.

[0101] In conjunction with some embodiments of the second aspect, in some embodiments, the correspondence is determined based on at least one of the following:

[0102] Based on the first indication information included in the at least one synchronization signal, the first indication information is used to indicate the PBCH signal associated with the synchronization signal;

[0103] Based on the second indication information included in the PBCH signal, it is determined that the second indication information is used to indicate the synchronization signal associated with the PBCH signal, and the associated synchronization signal is a synchronization signal among the at least one synchronization signal.

[0104] In conjunction with some embodiments of the second aspect, in some embodiments, the resource mapping method of the synchronization signal includes a time-domain resource mapping method, wherein the time-domain resource mapping method includes at least one of the following:

[0105] The number of symbols occupied by the PSS is the same as the number of symbols occupied by the SSS;

[0106] The number of symbols occupied by the PSS is different from the number of symbols occupied by the SSS;

[0107] The number of symbols occupied by the PSS is adjacent to the number of symbols occupied by the SSS;

[0108] The symbol occupied by the PSS precedes the symbol occupied by the SSS;

[0109] The symbol occupied by the PSS follows the symbol occupied by the SSS;

[0110] The symbols occupied by the PSS are repeatedly mapped on the time-domain resources;

[0111] The symbols occupied by the SSS are repeatedly mapped on time-domain resources.

[0112] In conjunction with some embodiments of the second aspect, in some embodiments, the resource mapping method of the synchronization signal includes a frequency domain resource mapping method, wherein the frequency domain resource mapping method includes at least one of the following:

[0113] The number of resource units occupied by the PSS is the same as the number of resource units occupied by the SSS;

[0114] The number of resource units occupied by the PSS is different from the number of resource units occupied by the SSS;

[0115] The resource units occupied by the PSS are repeatedly mapped on the frequency domain resources, and there is a first number of resource units between two adjacent repeated PSSs.

[0116] The resource units occupied by the SSS are repeatedly mapped on the frequency domain resources, and there is a second number of resource units between two adjacent repeated SSSs.

[0117] Wherein, the first quantity is the same as or different from the second quantity.

[0118] In conjunction with some embodiments of the second aspect, in some embodiments, the resource mapping method of the synchronization signal and the PBCH signal includes at least one of the following:

[0119] The synchronization signal and the PBCH signal are independently mapped in the time domain, and the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are not continuous. The first two symbols occupied by the PBCH signal carry the same information.

[0120] The synchronization signal and the PBCH signal are independently mapped in the frequency domain resources, and frequency division multiplexing on the same time domain resources is not supported.

[0121] The synchronization signal and the PBCH signal are associated and mapped in the time domain resources, and the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are consecutive to each other. The symbols occupied by the synchronization signal are all before the symbols occupied by the PBCH signal. The PBCH signal occupying the first symbol is mapped in the frequency domain resources. The resource units occupied by the PBCH signal are a portion of the resource units in the first symbol. The resource units occupied by the PBCH signal are repeatedly mapped until all resource units in the first symbol are occupied. The first symbol is any symbol occupied by the PBCH signal.

[0122] The synchronization signal and the PBCH signal are associated and mapped in the time domain resources, and the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are not continuous. The first two symbols occupied by the PBCH signal carry the same information.

[0123] Wherein, the synchronization signal and the PBCH signal are associated and mapped in the time domain resources, and the transmission period of the PBCH signal is N times the transmission period of the synchronization signal, where N is an integer greater than or equal to 2.

[0124] In conjunction with some embodiments of the second aspect, in some embodiments,

[0125] The transmission of the synchronization signal and resource mapping are independent of the transmission of the PBCH signal.

[0126] Thirdly, embodiments of this disclosure provide a network device, including:

[0127] The first processing module is used to determine the transmission period of the synchronization signal and the resource mapping method;

[0128] The first transceiver module is used to send the synchronization signal based on the transmission period and resource mapping method of the synchronization signal;

[0129] The synchronization signals include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS); the synchronization signals are transmitted independently of the physical broadcast channel (PBCH) signal.

[0130] Fourthly, embodiments of this disclosure provide a terminal, including:

[0131] The second transceiver module is used to acquire the transmission period and resource mapping method of the synchronization signal; and to receive the synchronization signal based on the transmission period and resource mapping method of the synchronization signal.

[0132] The synchronization signals include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS); the synchronization signals are transmitted independently of the physical broadcast channel (PBCH) signal.

[0133] Fifthly, embodiments of this disclosure provide a communication device, comprising:

[0134] One or more processors;

[0135] The terminal executes the method described in the optional implementation of the first aspect.

[0136] According to a sixth aspect of the present disclosure, a communication device is provided, comprising:

[0137] One or more processors;

[0138] The network device performs the method described in the optional implementation of the second aspect.

[0139] In a seventh aspect, embodiments of this disclosure provide a communication system including a terminal and a network device, wherein the terminal is used to implement the method described in the optional implementation of the second aspect, and the network device is used to implement the method described in the optional implementation of the first aspect.

[0140] Eighthly, embodiments of this disclosure provide a storage medium storing instructions that, when executed on a communication device, cause the communication device to perform the method as described in the optional embodiments of the first or second aspect.

[0141] Ninthly, embodiments of this disclosure provide a program product that, when executed by a communication device, causes the communication device to perform the method as described in the optional implementation of the first or second aspect.

[0142] In a tenth aspect, embodiments of this disclosure provide a computer program that, when run on a computer, causes the computer to perform the methods described in an optional implementation of the first or second aspect.

[0143] Eleventhly, embodiments of this disclosure provide a chip or chip system including processing circuitry for performing the method described in an optional implementation of the first or second aspect above.

[0144] Understandably, the aforementioned devices, communication equipment, communication systems, storage media, program products, and computer programs for random access are all used to execute the methods proposed in the embodiments of this disclosure. Therefore, the beneficial effects they can achieve can be referred to the beneficial effects in the corresponding methods, and will not be repeated here. The communication equipment can be a terminal or a network device.

[0145] This disclosure provides communication methods, apparatus, devices, systems, and storage media.

[0146] In some embodiments, the terms "communication method" and "for random access" can be used interchangeably, the terms "apparatus for random access" and "communication device" can be used interchangeably, and the terms "communication system" can be used interchangeably.

[0147] This disclosure is not exhaustive, but merely illustrative of some embodiments, and is not intended to limit the scope of protection of the embodiments disclosed. Unless otherwise specified, each step in a particular 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 particular embodiment can also be implemented as an independent embodiment, and the order of the steps in a particular embodiment can be arbitrarily interchanged. Furthermore, the optional implementation methods in a particular embodiment can be arbitrarily combined; moreover, the embodiments can be arbitrarily combined, for example, some or all steps of different embodiments can be arbitrarily combined, and a particular embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0148] In each of the disclosed embodiments, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of the embodiments are consistent and can be referenced by each other. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0149] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this disclosure.

[0150] In this embodiment of the disclosure, unless otherwise stated, elements expressed in the singular form, such as "a," "an," "the," "the," "the," "the," "the," "the," "this," etc., can mean "one and only one," or "one or more," "at least one," etc. For example, when using articles such as "a," "an," "the," etc. in translation, the noun following the article can be understood as either a singular expression or a plural expression.

[0151] In the embodiments disclosed herein, "multiple" refers to two or more.

[0152] 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., may be used interchangeably.

[0153] The descriptions in this disclosure, such as "at least one of A, B, C..." or "A and / or B and / or C...", include the case where any one of A, B, C... exists alone, as well as the case where any combination of any of A, B, C... exists alone. Each case can exist alone. For example, "at least one of A, B, C" includes the cases of A alone, B alone, C alone, A and B combination, A and C combination, B and C combination, and A and B and C combination. For example, A and / or B includes the cases of A alone, B alone, and A and B combination.

[0154] In some embodiments, the notation "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: A is executed regardless of B, i.e., A is executed in some embodiments; B is executed regardless of A, i.e., B is executed in some embodiments; A and B are selectively executed, i.e., A and B are selected for execution in some embodiments; A and B are both executed, i.e., A and B are executed in some embodiments. The same applies when there are more branches such as A, B, and C.

[0155] The prefixes "first," "second," etc., used in the embodiments of this disclosure are merely for distinguishing different descriptive objects and do not impose restrictions on the position, order, priority, quantity, or content of the descriptive objects. The description of the descriptive objects is found in the claims or the context of the embodiments, and the use of prefixes should not constitute unnecessary restrictions. For example, if the descriptive object is a "field," the ordinal numbers preceding "field" in "first field" and "second field" do not restrict the position or order of the "fields." "First" and "second" do not restrict whether the "fields" they modify are in the same message, nor do they restrict the order of "first field" and "second field." Similarly, if the descriptive object is a "level," the ordinal numbers preceding "level" in "first level" and "second level" do not restrict the priority between "levels." Furthermore, the number of descriptive objects is not limited by ordinal numbers and can be one or more. For example, in "first device," the number of "devices" can be one or more. Furthermore, the objects modified by different prefixes can be the same or different. For example, if the object being described is "device", then "first device" and "second device" can be the same device or different devices, and their types can be the same or different. As another example, if the object being described is "information", then "first configuration" and "second configuration" can be the same information or different information, and their content can be the same or different.

[0156] In some embodiments, “including A,” “containing A,” “for indicating A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0157] In some embodiments, the terms “in response to…”, “in response to determining…”, “in the case of…”, “when…”, “if…”, “if…”, etc., can be used interchangeably.

[0158] In some embodiments, the terms “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 lower than,” and “above” can be used interchangeably, as can the terms “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”.

[0159] 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”, “circuit”, “network element”, “node”, “function”, “unit”, “section”, “system”, “network”, “chip”, “chip system”, “entity”, and “subject” can be used interchangeably.

[0160] 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," and "bandwidth part (BWP)" can be used interchangeably.

[0161] 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", and "client" can be used interchangeably.

[0162] In some embodiments, the access network device, core network device, or network device can be replaced by a terminal. For example, various embodiments of this disclosure can also be applied to structures that replace communication between the access network device, core network device, or network device and the terminal with communication between multiple terminals (e.g., also referred to as device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, the terminal can also be configured to have all or part of the functions of the access network device. Furthermore, terms such as "uplink" and "downlink" can be replaced with terms corresponding to communication between terminals (e.g., "side").

[0163] For example, uplink channels and downlink channels can be replaced with side channels, and uplink links and downlink links can be replaced with side links.

[0164] In some embodiments, the terms "uplink", "uplink", and "physical uplink" can be used interchangeably, as can the terms "downlink", "downlink", and "physical downlink", as well as the terms "sidelink", "sidelink", "sidelink communication", "sidelink communication", "direct connection", "direct link", "direct communication", and "direct link communication".

[0165] In some embodiments, the terms “downlink control information (DCI),” “downlink (DL) assignment,” “DL DCI,” “uplink (UL) grant,” and “UL DCI” can be used interchangeably.

[0166] In some embodiments, terms such as "physical downlink shared channel (PDSCH)" and "DL data" can be used interchangeably, as can terms such as "physical uplink shared channel (PUSCH)" and "UL data".

[0167] In some embodiments, the determination or judgment can be made by a value represented by 1 bit (0 or 1), or by a true or false value (boolean), or by a comparison of numerical values ​​(e.g., a comparison with a predetermined value), but is not limited thereto.

[0168] In some embodiments, "network" can be interpreted as devices included in a network (e.g., access network devices, core network devices, etc.).

[0169] In some embodiments, the acquisition of data, information, etc., may comply with the laws and regulations of the country where the location is situated.

[0170] In some embodiments, data, information, etc., may be obtained with the user's consent.

[0171] Figure 1a is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure.

[0172] As shown in Figure 1a, the communication system 100 includes a terminal 101 and a network device 102.

[0173] In some embodiments, terminal 101 includes, but is not limited to, at least one of the following: mobile phone, wearable device, Internet of Things device, car with communication function, smart car, tablet computer, computer with wireless transceiver function, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal device in industrial control, wireless terminal device in self-driving, wireless terminal device in remote medical surgery, wireless terminal device in smart grid, wireless terminal device in transportation safety, wireless terminal device in smart city, and wireless terminal device in smart home.

[0174] In some embodiments, network device 102 may include at least one of access network device and core network device.

[0175] In some embodiments, the access network device is, for example, a node or device that connects a terminal to a wireless network. The network device may include, but is not limited to, at least one of the following in a 5G communication system: evolved Node B (eNB), next-generation eNB (ng-eNB), next-generation Node B (gNB), node B (NB), home node B (HNB), home evolved node B (HeNB), wireless backhaul device, radio network controller (RNC), base station controller (BSC), base transceiver station (BTS), base band unit (BBU), mobile switching center, base station in a 6G communication system, open RAN, cloud RAN, base station in other communication systems, and access node in a wireless fidelity (WiFi) system.

[0176] In some embodiments, the technical solutions of this disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within network devices involved in the embodiments of this disclosure can be transformed into internal interfaces of Open RAN. The processes and information interactions between these internal interfaces can be implemented by software or programs.

[0177] In some embodiments, the access network device may be composed of a central unit (CU) and a distributed unit (DU). The CU may also be called a control unit. The CU-DU structure can separate the protocol layer of the network device. Some of the protocol layer functions are centrally controlled by the CU, while the remaining part or all of the protocol layer functions are distributed in the DU and centrally controlled by the CU. However, this is not the only possibility.

[0178] In some embodiments, the access network device may be a single device, multiple devices, or a group of devices, including all or part of a first network element, a second network element, etc. Network elements may be virtual or physical. Network devices may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0179] In some embodiments, a core network device may be a single device comprising one or more network elements, or it may be multiple devices or a group of devices, each comprising all or part of the aforementioned one or more network elements. Network elements may be virtual or physical. The core network may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), or a Next Generation Core (NGC).

[0180] It is understood that the communication system described in this disclosure is for the purpose of more clearly illustrating the technical solutions of this disclosure, and does not constitute a limitation on the technical solutions proposed in this disclosure. As those skilled in the art will know, with the evolution of system architecture and the emergence of new business scenarios, the technical solutions proposed in this disclosure are also applicable to similar technical problems.

[0181] The following embodiments of this disclosure can be applied to the communication system 100 shown in FIG1a, or to some of the main bodies, but are not limited thereto. The main bodies shown in FIG1a are illustrative. The communication system may include all or some of the main bodies in FIG1a, or it may include other main bodies outside of FIG1a. The number and form of each main body are arbitrary. The connection relationship between the main bodies is illustrative. The main bodies may not be connected or may be connected. The connection can be in any way, it can be a direct connection or an indirect connection, it can be a wired connection or a wireless connection.

[0182] The embodiments disclosed herein 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), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), and IEEE 802.20, Ultra-Wideband (UWB), Bluetooth (a 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 systems for random access, and next-generation systems built upon them, etc. Furthermore, multiple systems can be combined (e.g., a combination of LTE or LTE-A with 5G).

[0183] In mobile communication networks, a UE needs to connect to the network through an initial access procedure before transmitting data. This initial access procedure includes stages such as cell search, system information reception, and random access.

[0184] Cell search is the process by which the UE uses cell synchronization signals to perform downlink time and frequency synchronization and obtain the Physical Cell Identity (PCID). After completing downlink synchronization through cell search, the UE receives and decodes the Physical Broadcast Channel and the PDSCH carrying the minimum remaining system information to obtain the system information necessary for subsequent random access.

[0185] After acquiring system information, the UE performs uplink time synchronization through a random access procedure, transitioning from a non-RRC (Radio Resource Control) connected state (RRC_IDLE and RRC INACTIVE) to an RRC connected state (RRC_CONNECTED), preparing for uplink and downlink data transmission. The paging procedure is used to help the network page UEs that are in a non-RRC connected state.

[0186] In 5G systems, the downlink synchronization process involves the New Radio (NR) Synchronization Signal Block (SSB), which includes the Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), and Physical Broadcast Channel (PBCH). The PBCH contains the Demodulation Reference Symbol (DM-RS). When a UE accesses the 5G NR system, it first detects the PSS and SSS to obtain downlink time-frequency synchronization and the PCID, and then decodes the PBCH. The PBCH includes the Master Information Block (MIB) and other information related to the SSB transmission time. The MIB carries a portion of the minimum system information required for the UE to access the NR system. Several SSBs form an SSB Burst, which is transmitted periodically.

[0187] In a 5G NR system, an SS / PBCH block, also known as an SSB, is composed of three parts, as shown in Figure 1b: PSS, SSS, PBCH, and DM-RS. The SSB possesses the following characteristics in the time and frequency domains:

[0188] Time domain: The time domain occupies 4 consecutive Orthogonal Frequency Division Multiplexing (OFDM) symbols, with PSS in symbol #0, SSS in symbol #2, and PBCH in symbols #1, #2, and #3, where PBCH contains DM-RS.

[0189] Frequency domain: An SSB occupies 20 consecutive Physical Resource Blocks (PRBs) in the frequency domain, and its mapping method can refer to the existing protocol specifications.

[0190] Among them, PSS and SSS are mapped on 127 subcarriers (Resource Elements, REs) centered on PRB#4 to PRB#15 (a total of 12 PRBs) within their respective OFDM symbols. The 17 REs on these 12 PRBs that are not mapped to PSS or SSS are all mapped to 0.

[0191] The mappings of PBCH and DM-RS on OFDM symbols #1 and #3 respectively occupy all 240 REs of 20 PRBs, and the mapping on OFDM symbol #2 occupies all 96 REs of the first and last 8 PRBs. Therefore, the mapping of PBCH in an SSB accounts for a total of 576 REs.

[0192] The center frequencies of PSS / SSS and PBCH are aligned, and they both use the same subcarrier spacing.

[0193] The NR SSB synchronization signal includes the primary synchronization signal PSS and the secondary synchronization signal SSS. The PSS has three sequences corresponding to three IDs. One PSS corresponds to 336 SSS sequences, and the ID of the SSS is... NR supports a total of 1008 cell identifiers (PCIDs). The ID of each cell is determined by a combination of the PSS sequence and the SSS sequence.

[0194] Regarding NR PSS: The NR PSS sequence is obtained by BPSK modulation of an m sequence of length 127, and the three PSS sequences are obtained by different cyclic shifts.

[0195] Regarding NR SSS: The NR SSS sequence is obtained by BPSK modulation of a 127-length Gold sequence, and 336 SSS sequences are obtained through different cyclic shifts. Gold sequences exhibit good autocorrelation and cross-correlation properties, and their cross-correlation properties are the same as those of m-sequences, but their autocorrelation properties are not as good. When using a generator polynomial of the same order, the number of generated Gold sequences far exceeds the number of m-sequences; therefore, Gold sequences are used for SSS.

[0196] An SSB burst set, also known as an SSB burst collection, is a method used in 5G NR systems to transmit SSBs using beamforming and beam scanning technologies. A group of multiple SSBs transmitted by a cell in one beam scan (i.e., one round-robin) is called an SSB burst set. As shown in Figures 1c and 1d, Figure 1c illustrates the spatial beam diagram for transmitting each SSB (SSB0 to SSB7); Figure 1d shows the time corresponding to the transmission of each SSB (SSB0 to SSB7) within each SSB cycle.

[0197] 5G NR systems support higher frequency bands; the higher the frequency, the shorter the transmission distance. Beamforming can increase transmission distance by concentrating energy transmission, but this reduces the coverage angle. To balance transmission distance and coverage, beam scanning is used. As frequency increases, path loss in spatial propagation also increases, requiring narrower beams to compensate. This means more beams are needed to cover the entire cell; therefore, SSB burst transmission is employed.

[0198] During the initial cell search, the protocol stipulates that the UE will default to sending SSB burst sets with a period of 20ms, which is the length of two radio frames. Therefore, for cells that support initial cell search, the actual SSB transmission period cannot exceed 20ms, and can be configured to 5ms, 10ms, or 20ms.

[0199] After completing the initial cell search, each serving cell provides the UE with the transmission period of the SSB burst set (contained in the semi-radio frame) through the configuration parameter ssb-periodicityServingCell. The period value includes 5ms, 10ms, 20ms, 40ms, 80ms, and 160ms. If the serving cell does not configure a period value, the UE will default to a transmission period of 5ms for the SSB burst set. The UE assumes that all SSB burst sets within the same cell have the same period.

[0200] To minimize the system resource overhead used for the periodic broadcast PBCH, improve the success rate of PBCH decoding during initial access, and ensure reliable reception with sufficient cell coverage and edge coverage, the basic principle of PBCH design is to minimize the PBCH payload. As shown in Table 1, the NR PBCH payload is 56 bits, of which 24 bits come from the higher-layer broadcast channel BCCH-BCH, including 23 bits of MIB; the physical layer provides the remaining 32 bits of the PBCH, including 8 bits of information related to SSB transmission time and 24 bits of CRC. Within an SSB burst set, the PBCH content of all SSBs is identical, except for the SSB index and CRC.

[0201] Table 1NR PBCH Content

[0202] The main applications of PBCH DM-RS are as follows:

[0203] (1) Channel estimation

[0204] (2) Indicating a partial or complete SSB index: The DM-RS carries a small amount of SSB index information, i.e., a maximum of 3 bits. Indicating the SSB index in the DM-RS helps reduce the number of bits carried in the PBCH, allowing the UE to directly obtain SSB timing information from the PBCH DM-RS without decoding the PBCH; however, it also increases the implementation complexity of the UE, because the UE needs to perform blind detection, which affects the performance of channel estimation and the reliability of SSB index estimation. Ultimately, a compromise of a maximum of 3 bits is adopted.

[0205] FR1, DM-RS indicates the complete SSB index, 2 bits or 3 bits.

[0206] FR2, DM-RS indicates the 3-bit LSB of the SSB index.

[0207] Regarding the generation process of PBCH DM-RS, the NR PBCH DM-RS sequence is a random sequence generated from a Gold sequence of order 31, and the desired DM-RS sequence is obtained by QPSK modulation.

[0208] The maximum number of SSBs in the SSB burst set L=4: The parameters used in the initialization formula of the scrambling sequence include cell ID, half radio frame identifier (1 bit), and SSB index (indicating the full SSB index 2 bits).

[0209] The maximum number of SSBs in the SSB burst set is L=8: The parameters used for initializing the consensus of the scrambled sequence include cell ID and SSB index (indicating the complete SSB index 3 bits).

[0210] The maximum number of SSBs in the SSB burst set is L = 64: The parameters used for initial consensus of the scrambled sequence include cell ID and SSB index (the indicator part SSB index 3 bits LSB).

[0211] Regarding the resource mapping of PBCH DM-RS:

[0212] Time domain: PBCH DM-RS is located on the last 3 OFDM symbols of an SSB.

[0213] Frequency Domain: PBCH DM-RS are uniformly mapped onto the frequency domain resources of PBCH at intervals of 4 REs, meaning that one DM-RS will appear in every 4 REs. During the mapping process, in order to randomize the mutual interference of PBCH DM-RS between cells, a quantization parameter v = cell ID mod 4 is introduced. That is, when PBCH DM-RS is mapped to RE, RE offset is performed according to parameter v.

[0214] In 5G NR systems, the Synchronization Signal Block (SSB) comprises the PSS / SSS and PBCH. Each SSB occupies four OFDM symbols; therefore, the SSB is transmitted as a whole each time it is sent. In actual network deployments, the PSS / SSS is primarily used by the UE for time-frequency synchronization and some measurements, while the PBCH, containing the MIB, is mainly used for the UE's initial access. Often, the UE only needs to periodically receive the PSS / SSS to ensure its time-frequency accuracy, without requiring network access. Therefore, the UE does not need to frequently receive / decode the PBCH. If the SSB were to transmit the PSS / SSS and PBCH as a whole each time, it would consume significant resources, resulting in waste.

[0215] To address the aforementioned technical problems, this disclosure proposes a scheme in which synchronization signals and system messages are sent independently.

[0216] Based on the aforementioned wireless communication system, various embodiments of the communication method proposed in this disclosure will be described in detail below.

[0217] Figure 2 is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure. As shown in Figure 2, the communication method is used in a communication system 100, and the method includes:

[0218] S201. The network device determines the transmission period and resource mapping method of the synchronization signal and / or PBCH signal.

[0219] In some embodiments, the synchronization signal may include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS).

[0220] In some embodiments, the transmission period and resource mapping method of the synchronization signal and the PBCH signal can be determined separately. Optionally, the determination of the transmission period and resource mapping method of the synchronization signal and the determination of the transmission period and resource mapping method of the PBCH signal can be completed in the same step or in different steps, and there is no limitation on this.

[0221] Optionally, the transmission period and resource mapping method of the synchronization signal can be independent of the transmission period and resource mapping method of the PBCH signal. Alternatively, the transmission period and resource mapping method of the PBCH signal can be independent of the transmission period and resource mapping method of the synchronization signal. Alternatively, the transmission period of the PBCH signal and its mapping position on time-domain resources can be associated with the transmission period and mapping position on time-domain resources of the synchronization signal.

[0222] In some embodiments, only the transmission period and resource mapping method of the synchronization signal can be determined, or only the transmission period and resource mapping method of the PBCH signal can be determined.

[0223] In some embodiments, the transmission period of the synchronization signal and the transmission period of the PBCH signal may be different. Optionally, the synchronization signal and the PBCH may be transmitted according to their respective transmission periods.

[0224] In some embodiments, the synchronization signal and the PBCH are independent of each other. Optionally, the transmission of the synchronization signal wirelessly references the transmission of the PBCH signal, and the transmission of the PBCH signal does not require reference to the transmission of the synchronization signal.

[0225] In some embodiments, if the transmission period of the synchronization signal is T1 and the transmission period of the PBCH signal is T2, then T1 ≠ T2. Optionally, T1 and T2 are both positive integers, and the unit is milliseconds (ms).

[0226] In some embodiments, the value range of T1 includes, but is not limited to, {5ms, 10ms, 20ms, 40ms, 80ms, 160ms, 320ms, 640ms, 800ms, 1000ms, >1000ms}. Optionally, preferred values ​​for T1 may include 320ms and 640ms, but are not limited to these.

[0227] In some embodiments, the value range of T2 includes, but is not limited to, {5ms, 10ms, 20ms, 40ms, 80ms, 160ms, 320ms, 640ms, 800ms, 1000ms, >1000ms}. Optionally, preferred values ​​for T2 may include 320ms and 640ms, but are not limited to these.

[0228] In some embodiments, the transmission period of the PBCH signal is N times the transmission period of the synchronization signal, where N is an integer greater than or equal to 1. Optionally, at least one synchronization signal transmitted before the PBCH signal corresponds to the PBCH signal.

[0229] In some embodiments, the transmission period of the synchronization signal is 1 / N times the transmission period of the PBCH signal, so N synchronization signals can correspond to one PBCH.

[0230] In some embodiments, the transmission period of the PBCH signal can be an integer multiple of the transmission period of the synchronization signal. Optionally, the transmission period of the synchronization signal and the transmission period of the PBCH signal can be the same, that is, the transmission period of the PBCH signal can be 1 time the transmission period of the synchronization signal (N=1).

[0231] In some embodiments, the synchronization signal and the PBCH signal have the same transmission period, but they can be transmitted separately (or independently). That is, the transmission of the synchronization signal and the PBCH signal does not support frequency division multiplexing on the same time domain resources.

[0232] For example, if the transmission period T1 of the synchronization signal is the same as the transmission period T2 of the PBCH signal, that is, T1 = T2, then the transmission of the synchronization signal and the PBCH signal can be as shown in Figure 3a, but is not limited to this.

[0233] In some embodiments, if the transmission period T1 of the synchronization signal is the same as the transmission period T2 of the PBCH signal, then there is a one-to-one correspondence between the synchronization signal and the PBCH signal. Optionally, after the UE detects the synchronization signal during cell search and performs downlink synchronization based on the detected synchronization signal, the received PBCH signal is a PBCH signal associated with the previously detected synchronization signal. In this case, it is not necessary to carry information indicating the association between the two in the synchronization signal or the PBCH signal.

[0234] In some embodiments, the transmission period of the PBCH signal can be at least twice the transmission period of the synchronization signal (N is an integer greater than or equal to 2). Optionally, the transmission of the PBCH signal in the time domain needs to refer to the time domain position of the synchronization signal.

[0235] For example, if the transmission period T2 of the PBCH signal is twice the transmission period T1 of the synchronization signal, that is, T2 = T1 * 2, then the transmission of the synchronization signal and the PBCH signal can be as shown in Figure 3b, but is not limited to this.

[0236] In some embodiments, if the transmission period of the PBCH signal is at least twice the transmission period of the synchronization signal, then at least two synchronization signals previously transmitted with the PBCH signal correspond to the PBCH signal. Optionally, after the UE detects a synchronization signal during cell search and performs downlink synchronization based on the detected synchronization signal, if the received PBCH signal corresponds to the previously detected synchronization signal, information indicating the association between the two can be carried in either the synchronization signal or the PBCH signal.

[0237] In some embodiments, the above correspondence is determined based on at least one of the following:

[0238] The first indication information is determined based on at least one synchronization signal, which is used to indicate the PBCH signal associated with the synchronization signal.

[0239] The second indication information included in the PBCH signal is used to indicate the synchronization signal associated with the PBCH signal, which is a synchronization signal among at least one synchronization signal.

[0240] In some embodiments, the terminal can determine the PBCH signal associated with the synchronization signal by using first indication information carried in one or more of the received at least two synchronization signals. Optionally, after the UE detects the synchronization signal during cell search and performs downlink synchronization based on the detected synchronization signal, it can determine the PBCH signal associated with the synchronization signal based on the first indication information carried in the synchronization signal, and detect the PBCH signal associated with the synchronization signal based on this to facilitate subsequent acquisition of the Master Information Block (MIB).

[0241] In some embodiments, the network device may determine whether one or more of the at least two synchronization signals preceding the current PBCH signal are related to the current PBCH signal by using second indication information carried in the currently received PBCH signal.

[0242] In some embodiments, the resource mapping method for synchronization signals includes a time-domain resource mapping method. Optionally, the time-domain resource mapping method refers to the way in which the synchronization signal occupies symbols when mapping on time-domain resources. Optionally, the frequency-domain resource mapping method refers to the way in which the synchronization signal occupies frequency-domain resources when mapping on frequency-domain resources.

[0243] In some embodiments, the time-domain resource mapping method for synchronization signals includes at least one of the following:

[0244] The number of symbols used by PSS is the same as the number of symbols used by SSS;

[0245] The number of symbols used by PSS is different from the number of symbols used by SSS;

[0246] The number of symbols occupied by PSS is adjacent to the number of symbols occupied by SSS;

[0247] The symbols used by PSS precede those used by SSS;

[0248] The symbols used by PSS follow those used by SSS;

[0249] The symbols used by PSS are repeatedly mapped on time-domain resources;

[0250] The symbols occupied by SSS are repeatedly mapped on time-domain resources.

[0251] In some embodiments, the symbols used in this disclosure may be OFDM symbols.

[0252] In some embodiments, the synchronization signal, including the PSS and SSS, may occupy the same or different numbers of symbols, without limitation.

[0253] In some embodiments, the PSS included in the synchronization signal may occupy one or more symbols, and the SSS included in the synchronization signal may occupy one or more symbols; there is no limitation on this.

[0254] In embodiments of this disclosure, "multiple" can be understood as two or more.

[0255] In some embodiments, the synchronization signal, including the PSS and SSS, can occupy adjacent symbols. Optionally, if the PSS occupies K1 symbols and the SSS occupies K2 symbols, then the PSS and SSS can occupy (K1+K2) adjacent symbols.

[0256] In some embodiments, if PSS and SSS occupy adjacent symbols, the symbol occupied by PSS comes first and the symbol occupied by SSS comes second, or the symbol occupied by SSS comes first and the symbol occupied by PSS comes second, without limitation.

[0257] In some embodiments, the symbols occupied by a PSS can be repeatedly mapped in the time domain resources. Optionally, if one PSS occupies one OFDM symbol, then repeating a PSS twice will occupy two OFDM symbols.

[0258] In some embodiments, the symbols occupied by an SSS can be repeatedly mapped in the time domain resources. Optionally, if one SSS occupies two OFDM symbols, then repeating the SSS twice would occupy four OFDM symbols.

[0259] In the above embodiments, the purpose of repeatedly mapping PSS and SSS on time domain resources is to accelerate the realization of downlink time domain synchronization.

[0260] In some embodiments, the mapping method of the synchronization signal on the time domain resources can be any one of the above-mentioned mapping methods, or a combination of two or more. Optionally, the PSS and SSS included in the synchronization signal can occupy adjacent symbols, and the PSS and SSS occupy the same number of symbols, wherein the symbols occupied by the PSS come first, and the symbols occupied by the SSS come last. Optionally, the PSS and SSS included in the synchronization signal can occupy adjacent symbols, and the PSS and SSS occupy different numbers of symbols, with the symbols occupied by the PSS coming first, and the symbols occupied by the SSS coming last. Optionally, the PSS and SSS included in the synchronization signal can occupy adjacent symbols, and the PSS and SSS occupy the same number of symbols, wherein the symbols occupied by the SSS come first, and the symbols occupied by the PSS come last. Optionally, the PSS and SSS included in the synchronization signal can occupy adjacent symbols, and the PSS and SSS occupy different numbers of symbols, wherein the symbols occupied by the SSS come first, and the symbols occupied by the PSS come last.

[0261] In some embodiments, the resource mapping method for the synchronization signal includes a frequency domain resource mapping method. Optionally, the frequency domain resource mapping method includes at least one of the following:

[0262] The number of resource units occupied by PSS is the same as the number of resource units occupied by SSS;

[0263] The number of resource units occupied by PSS is different from the number of resource units occupied by SSS;

[0264] The resource units occupied by the PSS are repeatedly mapped on the frequency domain resources, and there is a first number of resource units between two adjacent repeated PSSs.

[0265] The resource units occupied by SSS are repeatedly mapped on the frequency domain resources, and there is a second number of resource units between two adjacent repeated SSS.

[0266] Among them, the first quantity is the same as or different from the second quantity.

[0267] In some embodiments, the synchronization signal, including the PSS and SSS, may occupy the same or different number of resource units, and there is no limitation thereto.

[0268] In some embodiments, a resource unit may include a RE (Resource Element) or an RB (Resource Block). An RE is the smallest unit of NR physical resources, occupying one OFDM symbol in the time domain and one subcarrier in the frequency domain. An RB occupies 12 subcarriers in the frequency domain. An RB may include a PRB (Physical Resource Block).

[0269] Optionally, the PSS and SSS included in the synchronization signal may occupy the same number or different numbers of REs; or, the PSS and SSS included in the synchronization signal may occupy the same number or different numbers of RBs, without limitation.

[0270] In some embodiments, the resource units occupied by a PSS can be repeatedly mapped in the frequency domain, and there is a first number of resource units between two adjacent repeated PSSs. Optionally, the first number can be 0, that is, there is no interval between two adjacent repeated PSSs in the frequency domain. Optionally, the first number can be a positive integer; the purpose of setting the first number here is to facilitate UE detection of PSS.

[0271] In some embodiments, the resource units occupied by an SSS can be repeatedly mapped in the frequency domain, and there is a second number of resource units between two adjacent repeated SSSs. Optionally, the second number can be 0, that is, there is no interval between two adjacent repeated SSSs in the frequency domain. Optionally, the second number can be a positive integer; the purpose of setting the second number here is to facilitate UE detection of SSS.

[0272] In some embodiments, the first quantity and the second quantity may be the same or different, and there is no limitation thereto.

[0273] In the above embodiments, the purpose of repeatedly mapping PSS and SSS on frequency domain resources is to accelerate the realization of downlink frequency domain synchronization.

[0274] In some embodiments, the resource mapping method for PBCH signals includes:

[0275] When mapped to time-domain resources, the PBCH signal occupies the third number of symbols;

[0276] When mapped onto frequency domain resources, the PBCH signal occupies the fourth number of resource units.

[0277] Optionally, the resource mapping methods for PBCH signals include: the way PBCH signals occupy symbols when mapped in the time domain, and the way PBCH signals occupy frequency domain resources when mapped in the frequency domain.

[0278] In some embodiments, when the PBCH signal is mapped in the time domain, the number of symbols occupied can be a positive integer. That is, the third number is a positive integer.

[0279] In some embodiments, if the PBCH signal and the synchronization signal are transmitted independently, the first two symbols occupied by the PBCH signal when mapped in the time domain carry the same information, wherein the first symbol of the first two symbols is used for automatic gain control (AGC).

[0280] In some embodiments, when the PBCH signal is mapped onto frequency domain resources, the number of resource units occupied can be a positive integer. That is, the fourth number is a positive integer. Optionally, the fourth number can be 20. For example, when the PBCH signal is mapped onto frequency domain resources, it can occupy 20 RBs.

[0281] In some embodiments, the resource mapping method for the above-mentioned synchronization signal and PBCH signal includes at least one of the following:

[0282] The synchronization signal and the PBCH signal are independently mapped in the time domain, and the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are discontinuous. The first two symbols occupied by the PBCH signal carry the same information.

[0283] Synchronization signals and PBCH signals are independently mapped in the frequency domain resources, and frequency division multiplexing on the same time domain resources is not supported.

[0284] The synchronization signal and the PBCH signal are associated and mapped in the time domain resources, and the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are consecutive. The symbols occupied by the synchronization signal all precede the symbols occupied by the PBCH signal. The PBCH signal occupying the first symbol is mapped in the frequency domain resources. The resource units occupied by the PBCH signal are part of the resource units in the first symbol. The resource units occupied by the PBCH signal are repeatedly mapped until all resource units in the first symbol are occupied. The first symbol is any symbol occupied by the PBCH signal.

[0285] The synchronization signal and the PBCH signal are associated and mapped in the time domain resources, and the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are discontinuous. The first two symbols occupied by the PBCH signal carry the same information.

[0286] In some embodiments, if the synchronization signal and the PBCH signal are associated and mapped in the time domain resources, the transmission period of the PBCH signal is N times the transmission period of the synchronization signal, where N is an integer greater than or equal to 2.

[0287] In some embodiments, the mapping of the synchronization signal and the PBCH signal in the time domain resources is independent of each other, and the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are discontinuous. In this case, the first two symbols occupied by the PBCH signal carry the same information.

[0288] In some embodiments, if the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are adjacent, then the symbols occupied by them are continuous; otherwise, they are discontinuous. That is, the continuity of the synchronization signal and the PBCH signal in the time domain refers to the symbol level. Optionally, the synchronization signal includes PSS and SSS. PSS and SSS can occupy adjacent symbols or non-adjacent symbols. If the symbols occupied by SSS are adjacent to the symbols occupied by the PBCH signal, then the symbols occupied by the synchronization signal and the PBCH signal are continuous; otherwise, the symbols occupied by the synchronization signal and the PBCH signal are discontinuous.

[0289] Optionally, when the PSS in the synchronization signal is mapped on the time domain resource, it occupies 1 symbol (e.g., symbol #0), when the SSS in the synchronization signal is mapped on the time domain resource, it occupies 1 symbol (e.g., symbol #1), and when the PBCH signal is mapped on the time domain resource, it occupies 2 symbols (e.g., symbols #4 and #5, which are not adjacent to symbol #1). Symbols #4 and #5 carry the same information, and symbol #4 is used for AGC. For example, you can refer to the content shown in Figure 3c.

[0290] In some embodiments, the mapping of the synchronization signal and the PBCH signal in the frequency domain resources is independent of each other. When the synchronization signal and the PBCH signal are mapped in the frequency domain resources, frequency division multiplexing on the same time domain resources is not supported. For example, refer to the content shown in Figure 3a.

[0291] In some embodiments, the mapping of the synchronization signal and the PBCH signal in the time domain is associated, in which case time division multiplexing can be used for mapping.

[0292] In some embodiments, the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are consecutive.

[0293] Optionally, when the synchronization signal and the PBCH signal are mapped in the time domain using time-division multiplexing, if the synchronization signal and the PBCH signal occupy consecutive symbols, the symbols occupied by the synchronization signal shall precede the symbols occupied by the PBCH signal.

[0294] Optionally, when the synchronization signal and the PBCH signal are mapped in the time domain using time-division multiplexing, if the synchronization signal and the PBCH signal occupy consecutive symbols, and when the PBCH signal occupying the first symbol is mapped in the frequency domain, the resource unit occupied by the PBCH signal is only a portion of the resource units in the first symbol (i.e., the PBCH signal cannot fill all the resource units in the first symbol), then the resource units occupied by the PBCH signal are repeatedly mapped until all the resource units in the first symbol are filled, where the first symbol is any symbol occupied by the PBCH signal.

[0295] For example, if the PBCH signal occupies 10 RBs and symbol #2 includes 20 RBs, then when mapping the PBCH signal occupying symbol #2 on the frequency domain resources, repeating it twice can fill all 20 RBs in symbol #2.

[0296] In some embodiments, if the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are discontinuous, then the first two symbols occupied by the PBCH signal carry the same information. Optionally, when the synchronization signal and the PBCH signal are mapped in a time-division multiplexing manner in the time domain, if the synchronization signal and the PBCH signal occupy discontinuous symbols, then the first two symbols occupied by the PBCH signal must carry the same information, wherein the first symbol is used for AGC.

[0297] In some embodiments, the transmission of synchronization signals and resource mapping are independent of the transmission of PBCH signals.

[0298] In some embodiments, the transmission of synchronization signals and resource mapping may not require reference to the transmission of PBCH signals. Optionally, in some scenarios where only downlink synchronization is required and network access is not necessary, the transmission of synchronization signals and resource mapping may not require reference to the transmission of PBCH signals. In other scenarios, since downlink synchronization must be performed first before the Master Information Block (MIB) is acquired, the earlier transmission of synchronization signals and resource mapping does not require reference to the later transmission of PBCH signals.

[0299] In some embodiments, the transmission of PBCH signals may refer to the transmission of synchronization signals and resource mapping. Optionally, in some scenarios, since downlink synchronization must be performed first before the Master Information Block (MIB) is acquired, the subsequent transmission of PBCH signals needs to refer to the earlier transmission of synchronization signals and resource mapping, for example, as shown in Figure 3b.

[0300] S202, The network device sends the first information to the terminal.

[0301] In some embodiments, the first information includes: the transmission period and resource mapping method of the synchronization signal, and / or, the transmission period and resource mapping method of the PBCH signal.

[0302] In some embodiments, the terminal receives first information sent by the network device.

[0303] In some embodiments, after determining the transmission period and resource mapping method of the synchronization signal and / or PBCH signal, the network device may send first information to the terminal to notify the UE of the transmission period and resource mapping method of the synchronization signal and / or PBCH signal, so that the UE can receive the synchronization signal and / or PBCH signal sent by the network device based on the transmission period and resource mapping method of the synchronization signal and / or PBCH signal.

[0304] In some embodiments, step S202 described above is optional.

[0305] Optionally, if the network device does not send the transmission period and resource mapping method of the synchronization signal and / or PBCH signal to the terminal, the UE can perform blind detection on the synchronization signal and / or PBCH signal sent by the network device.

[0306] S203 includes at least one of steps S203-1 and S203-2.

[0307] In some embodiments, S203 includes step S203-1. Optionally, in S203-1, the network device sends a synchronization signal based on a determined transmission period and resource mapping method for the synchronization signal.

[0308] In some embodiments, the network device may send synchronization signals based on a determined transmission period and resource mapping method.

[0309] Optionally, the transmission period of the synchronization signal is T1, where T1 is a positive integer and the unit is milliseconds (ms).

[0310] Optionally, the resource mapping methods for synchronization signals include: time-domain resource mapping and frequency-domain resource mapping.

[0311] Optionally, the network device transmits synchronization signals in the mapped time and frequency domains with a period of T1. For example, the mapping of the synchronization signal in the time domain includes: PSS occupying symbol #0, SSS occupying symbol #1, and the mapping of the synchronization signal in the frequency domain includes: PSS occupying 10 RBs in symbol #0, and SSS occupying 5 RBs in symbol #1.

[0312] In some embodiments, S203 includes step S203-2. Optionally, in S203-2, the network device transmits the PBCH signal based on the determined transmission period and resource mapping method of the PBCH signal.

[0313] In some embodiments, the network device may transmit PBCH signals based on a determined PBCH signal transmission period and resource mapping method.

[0314] Optionally, the transmission period of the PBCH signal is T2, where T2 is a positive integer in milliseconds (ms).

[0315] Optionally, the resource mapping method for PBCH signals includes mapping on time-domain resources and frequency-domain resources.

[0316] Optionally, the network device transmits the PBCH signal in the mapped time and frequency domains with a period of T2. For example, the time-domain mapping of the PBCH signal includes: the PBCH signal occupies symbols #3 and #4; the frequency-domain mapping of the PBCH signal includes: the PBCH signal occupies 10 RBs in symbol #3 and 10 RBs in symbol #4, wherein the 10 RBs in symbol #3 are the same as the 10 RBs in symbol #4.

[0317] In some embodiments, S203 includes steps S203-1 and S203-2.

[0318] In some embodiments, the network device may send a synchronization signal based on a determined transmission period and resource mapping method for the synchronization signal, and send a PBCH signal based on a determined transmission period and resource mapping method for the PBCH signal.

[0319] In some embodiments, the synchronization signal and the PBCH signal are transmitted independently, or the synchronization signal and the PBCH signal are transmitted separately.

[0320] In some embodiments, the independent transmission of the synchronization signal and the PBCH signal may include at least one of the following:

[0321] The resource mappings of the synchronization signal and the PBCH signal are independent of each other;

[0322] The transmission times of the synchronization signal and the PBCH signal are independent of each other;

[0323] The transmission periods of the synchronization signal and the PBCH signal are independent of each other.

[0324] Optionally, the synchronization signal and the PBCH signal are sent at different times according to their respective mappings in the time domain and frequency domain resources.

[0325] In some embodiments, the synchronization signal and the PBCH signal are transmitted independently of each other. Optionally, the synchronization signal and the PBCH signal are transmitted at their respective periods.

[0326] In some embodiments, the transmission period T1 of the synchronization signal is the same as the transmission period T2 of the PBCH signal, but the synchronization signal and the PBCH signal do not support frequency division multiplexing on the same time domain resources, for example, see the content shown in Figure 3a.

[0327] In some embodiments, the transmission period T1 of the synchronization signal is different from the transmission period T2 of the PBCH signal.

[0328] Optionally, the synchronization signal and the PBCH signal are independently mapped in the time domain, and the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are discontinuous. In this case, the first two symbols occupied by the PBCH signal carry the same information.

[0329] In some embodiments, the mapping of the synchronization signal does not need to refer to the transmission of the PBCH signal; the time-domain mapping of the PBCH signal needs to refer to the time-domain mapping position of the synchronization signal. Optionally, the transmission period of the PBCH signal can be an integer multiple of the transmission period of the synchronization signal, for example, as shown in Figure 3b.

[0330] In some embodiments, the synchronization signal and the PBCH signal are associated and mapped in the time domain.

[0331] Optionally, if the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are consecutive, then the symbols occupied by the synchronization signal precede the symbols occupied by the PBCH signal.

[0332] Optionally, the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are consecutive. When the PBCH signal occupying the first symbol is mapped on the frequency domain resources, the resource units occupied by the PBCH signal are part of the resource units in the first symbol (i.e., the PBCH signal cannot fill all the resource units in the first symbol). Then, the resource units occupied by the PBCH signal are repeatedly mapped until all the resource units in the first symbol are filled. Here, the first symbol is any symbol occupied by the PBCH signal.

[0333] Optionally, if the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are not consecutive, then the first two symbols occupied by the PBCH signal carry the same information, wherein the first symbol is used for AGC.

[0334] It should be noted that in the above embodiments, the terminal can receive synchronization signals and / or PBCH signals sent by the network device. Optionally, if the terminal receives the first information sent by the network device, it can receive the synchronization signals and / or PBCH signals sent by the network device based on the transmission period and mapping method of the acquired synchronization signals and / or PBCH signals. Optionally, if the terminal does not receive the first information sent by the network device, that is, if the transmission period and mapping method of the synchronization signals and / or PBCH signals are not acquired, then blind detection is performed on the synchronization signals and / or PBCH signals sent by the network device.

[0335] It should be noted that in the above embodiments, Figures 3a and 3b show cases where the frequency domains of the synchronization signal and the PBCH signal are different. However, in some embodiments, the frequency domains of the synchronization signal and the PBCH signal can be the same. For example, when they occupy different time domain resources, they can occupy the same frequency domain resources.

[0336] In some embodiments, the names of information, etc., are not limited to those described in the embodiments. Terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", and "data" can be used interchangeably.

[0337] In some embodiments, terms such as “send,” “transmit,” “report,” “distribute,” “transfer,” “bidirectional transmission,” “send and / or receive” can be used interchangeably.

[0338] In some embodiments, terms such as "certain," "preset," "default," "set," "indicated," "a certain," "any," and "first" can be used interchangeably. "Certain A," "preset A," "default A," "set A," "indicated A," "a certain A," "any A," and "first A" can be interpreted as A pre-defined in a protocol or the like, or as A obtained through setting, configuration, or instruction, or as specific A, a certain A, any A, or first A, but are not limited thereto.

[0339] In some embodiments, terms such as “in the case of,” “when,” “when,” “if,” “if,” etc., can be used interchangeably.

[0340] The method involved in the embodiments of this disclosure may include at least one of steps S201 to S203-2. For example, steps S201 and S203-1 may be implemented as independent embodiments, steps S201 and S203-2 may be implemented as independent embodiments, steps S201, S203-1 and S203-2 may be implemented as independent embodiments, steps S201, S202 and S203-1 may be implemented as independent embodiments, and steps S201, S202 and S203-2 may be implemented as independent embodiments, but are not limited thereto.

[0341] In some embodiments, step S202 is optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0342] In some embodiments, step S203-1 is optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0343] In some embodiments, step S203-2 is optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0344] Figure 4a is a flowchart illustrating a communication method according to an embodiment of the present disclosure. As shown in Figure 4a, the communication method can be executed by network device 102, and the method includes:

[0345] S301. Determine the transmission period and resource mapping method of the synchronization signal and / or PBCH signal.

[0346] The optional implementation of step S301 can be found in the optional implementation of step S201 in Figure 2 and other related parts in the embodiments involved in Figure 2, which will not be repeated here.

[0347] In some embodiments, the synchronization signal may include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS).

[0348] In some embodiments, the transmission period of the synchronization signal may be different from that of the PBCH signal.

[0349] In some embodiments, the transmission period of the PBCH signal can be an integer multiple of the transmission period of the synchronization signal.

[0350] In some embodiments, the transmission period of the PBCH signal is N times the transmission period of the synchronization signal, where N is an integer greater than or equal to 1. Optionally, at least one synchronization signal transmitted before the PBCH signal corresponds to the PBCH signal.

[0351] In some embodiments, if the transmission period of the PBCH signal is the same as the transmission period of the synchronization signal, then the synchronization signal and the PBCH signal correspond one-to-one.

[0352] In some embodiments, if the transmission period of the PBCH signal is at least twice the transmission period of the synchronization signal, then at least two synchronization signals transmitted before the PBCH signal correspond to the PBCH signal.

[0353] In some embodiments, the above correspondence is determined based on at least one of the following:

[0354] The first indication information is determined based on at least one synchronization signal, which is used to indicate the PBCH signal associated with the synchronization signal.

[0355] The second indication information included in the PBCH signal is used to indicate the synchronization signal associated with the PBCH signal, which is one of at least one synchronization signal.

[0356] In some embodiments, the resource mapping method for synchronization signals includes a time-domain resource mapping method.

[0357] In some embodiments, the time-domain resource mapping method for synchronization signals includes at least one of the following:

[0358] The number of symbols used by PSS is the same as the number of symbols used by SSS;

[0359] The number of symbols used by PSS is different from the number of symbols used by SSS;

[0360] The number of symbols occupied by PSS is adjacent to the number of symbols occupied by SSS;

[0361] The symbols used by PSS precede those used by SSS;

[0362] The symbols used by PSS follow those used by SSS;

[0363] The symbols used by PSS are repeatedly mapped on time-domain resources;

[0364] The symbols occupied by SSS are repeatedly mapped on time-domain resources.

[0365] In some embodiments, the resource mapping method for synchronization signals includes frequency domain resource mapping.

[0366] In some embodiments, frequency domain resource mapping methods include at least one of the following:

[0367] The number of resource units occupied by PSS is the same as the number of resource units occupied by SSS;

[0368] The number of resource units occupied by PSS is different from the number of resource units occupied by SSS;

[0369] The resource units occupied by the PSS are repeatedly mapped on the frequency domain resources, and there is a first number of resource units between two adjacent repeated PSSs.

[0370] The resource units occupied by SSS are repeatedly mapped on the frequency domain resources, and there is a second number of resource units between two adjacent repeated SSS.

[0371] Among them, the first quantity is the same as or different from the second quantity.

[0372] In some embodiments, the resource mapping method for PBCH signals includes:

[0373] When mapped to time-domain resources, the PBCH signal occupies the third number of symbols;

[0374] When mapped onto frequency domain resources, the PBCH signal occupies the fourth number of resource units.

[0375] S302. Based on the transmission period and resource mapping method of the synchronization signal, transmit the synchronization signal; and / or, based on the transmission period and resource mapping method of the PBCH signal, transmit the PBCH signal.

[0376] The optional implementation of step S302 can be found in the optional implementation of step S203 in Figure 2 and other related parts in the embodiments involved in Figure 2, which will not be repeated here.

[0377] In some embodiments, network devices may send synchronization signals based on the transmission period of the synchronization signal and the resource mapping method.

[0378] The above optional implementation methods can be found in the optional implementation of step S203-1 in Figure 2 and other related parts in the embodiments involved in Figure 2, which will not be repeated here.

[0379] In some embodiments, network devices may transmit PBCH signals based on the transmission period and resource mapping method of the PBCH signals.

[0380] The above optional implementation methods can be found in the optional implementation of step S203-2 in Figure 2 and other related parts in the embodiments involved in Figure 2, which will not be repeated here.

[0381] In some embodiments, the network device may send a synchronization signal based on a determined transmission period and resource mapping method for the synchronization signal, and send a PBCH signal based on a determined transmission period and resource mapping method for the PBCH signal.

[0382] In some embodiments, the synchronization signal and the PBCH signal are transmitted independently, or separately. Optionally, the synchronization signal and the PBCH signal are transmitted at different times according to their respective mappings in the time domain and frequency domain resources.

[0383] In some embodiments, the resource mapping method for synchronization signals and PBCH signals includes at least one of the following:

[0384] The synchronization signal and the PBCH signal are independently mapped in the time domain, and the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are discontinuous. The first two symbols occupied by the PBCH signal carry the same information.

[0385] Synchronization signals and PBCH signals are independently mapped in the frequency domain resources, and frequency division multiplexing on the same time domain resources is not supported.

[0386] The synchronization signal and the PBCH signal are associated and mapped in the time domain resources, and the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are consecutive. The symbols occupied by the synchronization signal all precede the symbols occupied by the PBCH signal. The PBCH signal occupying the first symbol is mapped in the frequency domain resources. The resource units occupied by the PBCH signal are part of the resource units in the first symbol. The resource units occupied by the PBCH signal are repeatedly mapped until all resource units in the first symbol are occupied. The first symbol is any symbol occupied by the PBCH signal.

[0387] The synchronization signal and the PBCH signal are associated and mapped in the time domain resources, and the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are discontinuous. The first two symbols occupied by the PBCH signal carry the same information.

[0388] In some embodiments, if the synchronization signal and the PBCH signal are associated and mapped in the time domain resources, the transmission period of the PBCH signal is N times the transmission period of the synchronization signal, where N is an integer greater than or equal to 2.

[0389] In some embodiments, the transmission of synchronization signals and resource mapping are independent of the transmission of PBCH signals.

[0390] In some embodiments, before step S302, the method may further include: sending first information to the terminal.

[0391] In some embodiments, the first information includes: the transmission period and resource mapping method of the synchronization signal, and / or, the transmission period and resource mapping method of the PBCH signal.

[0392] In some embodiments, after determining the transmission period and resource mapping method of the synchronization signal and / or PBCH signal, the network device may notify the UE of the determined transmission period and resource mapping method of the synchronization signal and / or PBCH signal, so that the UE can receive the synchronization signal and / or PBCH signal sent by the network device based on the transmission period and resource mapping method of the synchronization signal and / or PBCH signal.

[0393] The above-mentioned optional implementation methods can be found in the optional implementation methods of step S202 in Figure 2 and other related parts in the embodiments involved in Figure 2, which will not be repeated here.

[0394] Figure 4b is a flowchart illustrating a communication method according to an embodiment of the present disclosure. As shown in Figure 4b, the method involved in this embodiment is executed by terminal 101, and the method includes:

[0395] S401. Obtain the transmission period and resource mapping method of the synchronization signal and / or the physical broadcast channel (PBCH) signal.

[0396] In some embodiments, the terminal receives first information sent by the network device and obtains the transmission period and resource mapping method of the synchronization signal and / or the physical broadcast channel (PBCH) signal based on the first information.

[0397] Optionally, the first information includes the transmission period and resource mapping method of the synchronization signal, and / or the transmission period and resource mapping method of the physical broadcast channel (PBCH) signal.

[0398] The optional implementation of step S401 can be found in the optional implementation of step S202 in Figure 2 and other related parts in the embodiments involved in Figure 2, which will not be repeated here.

[0399] In some embodiments, the synchronization signal may include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS).

[0400] In some embodiments, the transmission period of the synchronization signal may be different from that of the PBCH signal.

[0401] In some embodiments, the transmission period of the PBCH signal can be an integer multiple of the transmission period of the synchronization signal.

[0402] In some embodiments, the transmission period of the PBCH signal is N times the transmission period of the synchronization signal, where N is an integer greater than or equal to 1. Optionally, at least one synchronization signal transmitted before the PBCH signal corresponds to the PBCH signal.

[0403] In some embodiments, if the transmission period of the PBCH signal is the same as the transmission period of the synchronization signal, then the synchronization signal and the PBCH signal correspond one-to-one.

[0404] In some embodiments, if the transmission period of the PBCH signal is at least twice the transmission period of the synchronization signal, then at least two synchronization signals transmitted before the PBCH signal correspond to the PBCH signal.

[0405] In some embodiments, the above correspondence is determined based on at least one of the following:

[0406] The first indication information is determined based on at least one synchronization signal, which is used to indicate the PBCH signal associated with the synchronization signal.

[0407] The second indication information included in the PBCH signal is used to indicate the synchronization signal associated with the PBCH signal, which is one of at least one synchronization signal.

[0408] In some embodiments, the resource mapping method for synchronization signals includes a time-domain resource mapping method.

[0409] In some embodiments, the time-domain resource mapping method for synchronization signals includes at least one of the following:

[0410] The number of symbols used by PSS is the same as the number of symbols used by SSS;

[0411] The number of symbols used by PSS is different from the number of symbols used by SSS;

[0412] The number of symbols occupied by PSS is adjacent to the number of symbols occupied by SSS;

[0413] The symbols used by PSS precede those used by SSS;

[0414] The symbols used by PSS follow those used by SSS;

[0415] The symbols used by PSS are repeatedly mapped on time-domain resources;

[0416] The symbols occupied by SSS are repeatedly mapped on time-domain resources.

[0417] In some embodiments, the resource mapping method for synchronization signals includes frequency domain resource mapping.

[0418] In some embodiments, frequency domain resource mapping methods include at least one of the following:

[0419] The number of resource units occupied by PSS is the same as the number of resource units occupied by SSS;

[0420] The number of resource units occupied by PSS is different from the number of resource units occupied by SSS;

[0421] The resource units occupied by the PSS are repeatedly mapped on the frequency domain resources, and there is a first number of resource units between two adjacent repeated PSSs.

[0422] The resource units occupied by SSS are repeatedly mapped on the frequency domain resources, and there is a second number of resource units between two adjacent repeated SSS.

[0423] Among them, the first quantity is the same as or different from the second quantity.

[0424] In some embodiments, the resource mapping method for PBCH signals includes:

[0425] When mapped to time-domain resources, the PBCH signal occupies the third number of symbols;

[0426] When mapped onto frequency domain resources, the PBCH signal occupies the fourth number of resource units.

[0427] S402. Receive the synchronization signal based on the transmission period and resource mapping method of the synchronization signal; and / or, receive the PBCH signal based on the transmission period and resource mapping method of the PBCH signal. Optional implementations of the above optional embodiments can be found in the optional implementation of step S203 in Figure 2, and other related parts in the embodiments involved in Figure 2, which will not be repeated here.

[0428] In some embodiments, the terminal may receive the synchronization signal sent by the network device based on the transmission period and resource mapping method of the synchronization signal.

[0429] The above optional implementation methods can be found in the optional implementation of step S203-1 in Figure 2 and other related parts in the embodiments involved in Figure 2, which will not be repeated here.

[0430] In some embodiments, the terminal can receive PBCH signals sent by the network device based on the PBCH signal transmission period and resource mapping method.

[0431] The above optional implementation methods can be found in the optional implementation of step S203-2 in Figure 2 and other related parts in the embodiments involved in Figure 2, which will not be repeated here.

[0432] In some embodiments, the terminal may receive the synchronization signal and PBCH signal sent by the network device based on the transmission period and resource mapping method of the acquired synchronization signal and PBCH signal.

[0433] In some embodiments, the synchronization signal and the PBCH signal are transmitted independently, or separately. Optionally, the synchronization signal and the PBCH signal are transmitted at different times according to their respective mappings in the time domain and frequency domain resources.

[0434] In some embodiments, the terminal can receive the synchronization signal and PBCH signal sent by the network device at different times on their respective time domain resources and frequency domain resources.

[0435] In some embodiments, the resource mapping method for synchronization signals and PBCH signals includes at least one of the following:

[0436] The synchronization signal and the PBCH signal are independently mapped in the time domain, and the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are discontinuous. The first two symbols occupied by the PBCH signal carry the same information.

[0437] Synchronization signals and PBCH signals are independently mapped in the frequency domain resources, and frequency division multiplexing on the same time domain resources is not supported.

[0438] The synchronization signal and the PBCH signal are associated and mapped in the time domain resources, and the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are consecutive. The symbols occupied by the synchronization signal all precede the symbols occupied by the PBCH signal. The PBCH signal occupying the first symbol is mapped in the frequency domain resources. The resource units occupied by the PBCH signal are part of the resource units in the first symbol. The resource units occupied by the PBCH signal are repeatedly mapped until all resource units in the first symbol are occupied. The first symbol is any symbol occupied by the PBCH signal.

[0439] The synchronization signal and the PBCH signal are associated and mapped in the time domain resources, and the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are discontinuous. The first two symbols occupied by the PBCH signal carry the same information.

[0440] In some embodiments, if the synchronization signal and the PBCH signal are associated and mapped in the time domain resources, the transmission period of the PBCH signal is N times the transmission period of the synchronization signal, where N is an integer greater than or equal to 2.

[0441] In some embodiments, the transmission of synchronization signals and resource mapping are independent of the transmission of PBCH signals.

[0442] This disclosure also provides an optional implementation scheme in which the transmission of PSS / SSS is independent of the transmission of PBCH. Optionally, PSS / SSS and PBCH have independent transmission cycles and independent resource mapping methods.

[0443] In some embodiments, the transmission cycles of PSS / SSS and PBCH have been extended from the existing levels in order to achieve network energy saving.

[0444] In some embodiments, PSS / SSS transmission is completely independent and does not require consideration of any PBCH transmission.

[0445] In some embodiments, PBCH transmission is divided into two cases: one is completely independent transmission, and the other is transmission that needs to be associated with PSS / SSS.

[0446] In some embodiments, the design of the primary synchronization signal / secondary synchronization signal (PSS / SSS) includes the following features:

[0447] 1. The transmission period for PSS / SSS is T1.

[0448] Optionally, the transmission period T1 of PSS / SSS is a positive integer, in milliseconds (ms).

[0449] In some embodiments, the value range of T1 includes, but is not limited to, {5ms, 10ms, 20ms, 40ms, 80ms, 160ms, 320ms, 640ms, 800ms, 1000ms, >1000ms}.

[0450] In some embodiments, when the UE performs synchronization during cell search, the default assumption is that the PSS / SSS transmission period is T1'. From the perspective of network energy saving, this scheme allows T1' to be selected as a larger value, such as 320ms or 640ms.

[0451] 2. Resource mapping for PSS / SSS.

[0452] 2.1 Time-domain resource mapping:

[0453] In some embodiments, the PSS occupies K1 OFDM symbols and the SSS occupies K2 OFDM symbols. K1 and K2 can both be positive integers and can be the same or different.

[0454] In some embodiments, PSS and SSS are mapped on adjacent (K1+K2) OFDM symbols, with PSS symbols preceding SSS symbols, or SSS symbols preceding PSS symbols.

[0455] In some embodiments, PSS / SSS can support symbol-level repetition in the time domain. Optionally, if one PSS occupies one OFDM symbol, then repeating a PSS twice occupies two OFDM symbols. It should be understood that the principle of SSS repetition in the time domain is the same as that of PSS, and will not be repeated here.

[0456] 2.2 Frequency Domain Resource Mapping:

[0457] In some embodiments, PSS occupies L1 REs and SSS occupies L2 REs, where L1 and L2 can both be positive integers.

[0458] In some embodiments, PSS accounts for RB, SSS account for There are RBs, where L1 and L2 can be the same or different.

[0459] In some embodiments, PSS and SSS can support repeated mapping in the frequency domain, and the interval between two adjacent repeated PSS or two adjacent repeated SSS is G1 REs or RBs, where G1 can be 0 or a positive integer.

[0460] It should be noted that the purpose of designing repeated mapping in the embodiments of this disclosure is to achieve frequency domain synchronization more quickly.

[0461] It should also be noted that in the embodiments of this disclosure, G1 is designed to facilitate UE detection of PSS / SSS.

[0462] In some embodiments, the PBCH design includes the following features:

[0463] 1. The transmission period of PBCH is T2.

[0464] Optionally, the characteristics of the T2 value can be referenced from the characteristics of the PSS / SSS period T1 mentioned above, and will not be repeated here.

[0465] 2. Resource mapping of PBCH.

[0466] 2.1 Time-domain resource mapping

[0467] In some embodiments, PBCH occupies M1 OFDM symbols, where M1 is a positive integer.

[0468] In some embodiments, when the PBCH is transmitted independently / separately from the PSS / SSS, the contents of the first two OFDM symbols of the PBCH are the same during the time-domain mapping process (the first symbol is used for AGC).

[0469] 2.2 Frequency Domain Resource Mapping

[0470] In some embodiments, PBCH occupies P1 RBs in the frequency domain, where P1 is a positive integer.

[0471] In some embodiments, P1 is 20.

[0472] In some embodiments, the design for mapping and transmitting PSS / SSS to PBCH includes the following features:

[0473] 1. PSS / SSS and PBCH are mapped and transmitted independently.

[0474] In some embodiments, PSS / SSS and PBCH are transmitted according to their respective periods, i.e., T1≠T2.

[0475] In some embodiments, PSS / SSS and PBCH are mapped independently on frequency domain resources, that is, FDM on the same time domain resources is not supported.

[0476] In some embodiments, when PSS / SSS and PBCH are mapped in the time domain, they are independent of each other, and the OFDM symbols they belong to are discontinuous.

[0477] 2. PSS / SSS independent mapping and transmission: PBCH needs to refer to the transmission position of PSS / SSS when transmitting.

[0478] In some embodiments, PSS / SSS are mapped and sent independently without referencing any PBCH sending information.

[0479] In some embodiments, the time-domain transmission position of the PBCH needs to be referenced to the time-domain position of the PSS / SSS.

[0480] Optionally, the PBCH period T2 is an integer multiple of the PSS / SSS period T1, i.e., T2 = T1 * b, where b is a positive integer.

[0481] 3. PSS / SSS is associated with PBCH and mapped using TDM mapping.

[0482] Method 1: The OFDM symbol where PSS / SSS is located is continuous with the OFDM symbol where PBCH is located.

[0483] In some embodiments, the OFDM symbol of PSS / SSS is before the OFDM symbol where PBCH is located. For any symbol containing PBCH, when mapping PBCH in the frequency domain, if PBCH cannot fill all N RB resources in the current frequency domain, frequency domain repetition is required until all N RBs in the current symbol are filled.

[0484] Method 2: The OFDM symbol where PSS / SSS is located is not continuous with the OFDM symbol where PBCH is located.

[0485] In some embodiments, the first OFDM symbol containing PBCH contains the same content as the second OFDM symbol containing PBCH, i.e., a repeated mapping, wherein the first symbol is used for AGC.

[0486] 4. The correspondence between PBCH and PSS / SSS can include one of the following:

[0487] If the period of PBCH is the same as the period of PSS / SSS, then PBCH and PSS / SSS are in one-to-one correspondence.

[0488] If the period of PBCH is an integer multiple of the period of PSS / SSS (e.g., U times, where U > 1), there is a correspondence between the U PSS / SSS sent before PBCH and the current PBCH.

[0489] In some embodiments, the above correspondence includes, but is not limited to: the PSS / SSS contains indication information for indicating the associated indication PBCH; the PBCH contains indication information for indicating the association of the preceding two PSS / SSS or any one of them.

[0490] It should be noted that when the network / base station transmits the aforementioned PSS / SSS, it does so in the form of beam scanning, that is: one period contains one PSS / SSS burst set, and one PSS / SSS burst set contains Y PSS / SSS. In some embodiments, the value of Y includes, but is not limited to, {1, 2, 4, 6, 8, 16, 32, 64}.

[0491] It should also be noted that when the network / base station transmits the aforementioned PBCH, it does so in the form of PBCH burst sets, that is, a PBCH burst set contains X PBCHs. In some embodiments, the value of X includes, but is not limited to, {1, 2, 4, 6, 8, 16, 32, 64}.

[0492] Example 1

[0493] The transmission cycles of PSS / SSS and PBCH are shown in Figure 5a.

[0494] The PSS / SSS transmission period T1 = 640ms, and the PSS / SSS burst set within one period contains 4 PSS / SSS.

[0495] The PBCH transmission period T2 = 1280ms, and the PBCH burst set within a week contains 4 PBCHs.

[0496] There is a correlation between PBCH and its two previous PSS / SSS burst sets.

[0497] Example 2

[0498] The mapping relationship between PSS / SSS and PBCH is shown in Figure 5b.

[0499] In Figure 5b, Figure (1) shows that the OFDM symbol where PSS / SSS is located is not continuous with the OFDM symbol where PBCH is located, and the first two OFDM symbols of PBCH are mapped repeatedly.

[0500] In Figure (2) of Figure 5b, the OFDM symbol where PSS / SSS is located is continuous with the OFDM symbol where PBCH is located, and the first symbol of PBCH does not need to be mapped repeatedly.

[0501] In Figure (3) of Figure 5b, when the third OFDM symbol where the PBCH is located cannot fill all the RBs of the current symbol, for example, it cannot fill 20 RBs, the PBCH in the current symbol is repeatedly mapped until it fills 20 RBs.

[0502] This disclosure also provides an apparatus for implementing any of the above methods. For example, an apparatus is provided that includes units or modules for implementing the steps performed by the terminal in any of the above methods. Alternatively, another apparatus is provided that includes units or modules for implementing the steps performed by a network device (e.g., an access network device, a core network functional node, a core network device, etc.) in any of the above methods.

[0503] It should be understood that the division of units or modules in the above device is only a logical functional division. In actual implementation, they can be fully or partially integrated into a single physical entity, or they can be physically separated. Furthermore, the units or modules in the device can be implemented by a processor calling software: for example, the device includes a processor connected to a memory containing instructions. The processor calls the instructions stored in the memory to implement any of the above methods or to implement the functions of the units or modules in the above device. The processor can be, for example, a general-purpose processor, such as a Central Processing Unit (CPU) or a microprocessor, and the memory can be internal or external to the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits. The functions of some or all of the units or modules can be achieved through the design of the hardware circuits. The aforementioned hardware circuits can be understood as one or more processors. For example, in one implementation, the aforementioned hardware circuit is an application-specific integrated circuit (ASIC). The functions of some or all of the aforementioned units or modules are achieved through the design of the logical relationships between the components within the circuit. As another example, in another implementation, the aforementioned hardware circuit can be implemented through a programmable logic device (PLD). Taking a field-programmable gate array (FPGA) as an example, it can include a large number of logic gates. The connection relationships between the logic gates are configured through configuration files, thereby achieving the functions of some or all of the aforementioned units or modules.

[0504] All units or modules of the above devices can be implemented entirely through processor-invoked software, entirely through hardware circuits, or partially through processor-invoked software with the remainder implemented through hardware circuits. In this embodiment, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction read and execute capabilities, 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 relationships of hardware circuits. These logical relationships are fixed or reconfigurable. For example, the processor may be a hardware circuit implemented using 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 configuring the hardware circuit 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 hardware circuits designed for artificial intelligence, which can be understood as ASICs, such as Neural Network Processing Units (NPUs), Tensor Processing Units (TPUs), and Deep Learning Processing Units (DPUs).

[0505] Figure 6a is a schematic diagram of the terminal structure proposed in an embodiment of this disclosure. As shown in Figure 6a, the network device includes at least one of a first transceiver module 601, a first processing module 602, etc.

[0506] In some embodiments, the first processing module 602 is used to determine the transmission period and resource mapping method of the synchronization signal; the first transceiver module 601 is used to transmit the synchronization signal based on the transmission period and resource mapping method of the synchronization signal; wherein, the synchronization signal includes: a primary synchronization signal PSS and a secondary synchronization signal SSS; the synchronization signal and the physical broadcast channel PBCH signal are transmitted independently.

[0507] Optionally, the first transceiver module 601 is used to execute the steps related to sending and receiving signaling executed by the network device 102 in any of the above methods, such as at least one of steps S202, S203-1, and S203-2 shown in FIG2, which will not be described in detail here.

[0508] Figure 6b is a schematic diagram of the network device proposed in an embodiment of this disclosure. As shown in Figure 6b, the terminal may include at least one of a second transceiver module 611, a second processing module 612, etc.

[0509] In some embodiments, the second transceiver module 611 is used to acquire the transmission period and resource mapping method of the synchronization signal; and to receive the synchronization signal based on the transmission period and resource mapping method of the synchronization signal; wherein the synchronization signal includes: a primary synchronization signal PSS and a secondary synchronization signal SSS; the synchronization signal and the physical broadcast channel PBCH signal are transmitted independently.

[0510] Optionally, the second transceiver module 611 is used to execute the steps related to sending and receiving signaling executed by the terminal 101 in any of the above methods, such as at least one of steps S202, S203-1, and S203-2 shown in FIG2, which will not be described in detail here.

[0511] Figure 7a is a schematic diagram of the structure of the communication device 7100 proposed in an embodiment of this disclosure. The communication device 7100 can be a network device (e.g., access network device, core network device, etc.), a terminal (e.g., user equipment, etc.), a chip, chip system, or processor that supports the network device in implementing any of the above methods, or a chip, chip system, or processor that supports the terminal in implementing any of the above methods. The communication device 7100 can be used to implement the methods described in the above method embodiments; for details, please refer to the descriptions in the above method embodiments.

[0512] 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, such as a baseband processor or a central processing unit (CPU). The baseband processor can be used to process communication protocols and communication data, while the CPU can be used to control communication devices (e.g., base stations, baseband chips, terminal devices, terminal device chips, DUs or CUs, etc.), execute programs, and process program data. The processor 7101 is used to invoke instructions to cause the communication device 7100 to execute any of the above methods.

[0513] 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 transceiver 7103 performs at least one of the communication steps such as sending and / or receiving in the above-described method (e.g., at least one of steps S202, S203-1, and S203-2 shown in FIG. 2, but not limited thereto), and the processor 7101 performs at least one of other steps (e.g., step S201 shown in FIG. 2, but not limited thereto). In optional embodiments, the transceiver may include a receiver and / or a transmitter, which may be separate or integrated together. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, interface, etc., can be used interchangeably; the terms transmitter, transmitting unit, transmitter, transmitting circuit, etc., can be used interchangeably; and the terms receiver, receiving unit, receiver, receiving circuit, etc., can be used interchangeably.

[0514] 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 also be located outside the communication device 7100.

[0515] 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, transceiver circuit, etc., may be used interchangeably; the terms transmitter, transmitting unit, transmitter, transmitting circuit, etc., may be used interchangeably; and the terms receiver, receiving unit, receiver, receiving circuit, etc., may be used interchangeably.

[0516] Optionally, the communication device 7100 further includes one or more interface circuits 7104, which are connected to the memory 7102. The interface circuits 7104 can be used to receive signals from the memory 7102 or other devices, and can be used to send signals to the memory 7102 or other devices. For example, the interface circuits 7104 can read instructions stored in the memory 7102 and send the instructions to the processor 7101.

[0517] The communication device 7100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 7100 described in this 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 chip, or chip system or subsystem; (2) a collection of one or more ICs, optionally, the IC collection may also include storage components for storing data and programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, terminal device, smart terminal device, cellular phone, wireless device, handheld device, mobile unit, vehicle device, network device, cloud device, artificial intelligence device, etc.; (6) others, etc.

[0518] Figure 7b is a schematic diagram of the structure of the chip 7200 proposed in an embodiment of this disclosure. For cases where the communication device 7100 can be a chip or a chip system, please refer to the schematic diagram of the chip 7200 shown in Figure 7b, but it is not limited thereto.

[0519] Chip 7200 includes one or more processors 7201. Chip 7200 is used to perform any of the above methods.

[0520] In some embodiments, chip 7200 further includes one or more interface circuits 7202. Optionally, terms such as interface circuit, interface, and transceiver pin can be used interchangeably. In some embodiments, chip 7200 further includes one or more memories 7203 for storing data. Optionally, all or part of the memories 7203 may be located outside of chip 7200. Optionally, interface circuit 7202 is connected to memory 7203, and interface circuit 7202 can be used to receive data from memory 7203 or other devices, and interface circuit 7202 can be used to send data to memory 7203 or other devices. For example, interface circuit 7202 can read data stored in memory 7203 and send the data to processor 7201.

[0521] In some embodiments, the interface circuit 7202 performs at least one of the communication steps such as sending and / or receiving in the above-described method (e.g., at least one of steps S202, S203-1, and S203-2 shown in FIG. 2, but not limited thereto). The interface circuit 7202 performing the communication steps such as sending and / or receiving in the above-described method refers, for example, to the interface circuit 7202 performing data interaction between the processor 7201, the chip 7200, the memory 7203, or the transceiver device. In some embodiments, the processor 7201 performs at least one of other steps (e.g., step S201 shown in FIG. 2, but not limited thereto).

[0522] This disclosure also provides a program product that, when executed by the communication device 7100, causes the communication device 7100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0523] This disclosure also proposes a computer program that, when run on a computer, causes the computer to perform any of the above methods.

[0524] The technical solutions described in the embodiments of this disclosure can be combined arbitrarily without conflict.

[0525] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0526] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A communication method characterized by comprising: The method is performed by a network device, and the method comprises: determining a transmission period and a resource mapping manner of a synchronization signal and a PBCH signal; transmitting the synchronization signal based on the transmission period and the resource mapping manner of the synchronization signal; wherein the synchronization signal comprises a primary synchronization signal (PSS) and a secondary synchronization signal (SSS); and the synchronization signal and the PBCH signal are transmitted independently.

2. The method of claim 1, wherein, The method further comprises: determining a transmission period and a resource mapping manner of the PBCH signal; transmitting the PBCH signal based on the transmission period and the resource mapping manner of the PBCH signal.

3. The method of claim 2, wherein: the transmission period of the synchronization signal is different from the transmission period of the PBCH signal; or the transmission period of the PBCH signal is N times of the transmission period of the synchronization signal, wherein at least one synchronization signal transmitted before the PBCH signal is associated with the PBCH signal, and N is an integer greater than or equal to 1.

4. The method of claim 3, wherein, The association is determined based on at least one of the following: based on first indication information included in the at least one synchronization signal, the first indication information being used to indicate a PBCH signal associated with the synchronization signal; based on second indication information included in the PBCH signal, the second indication information being used to indicate a synchronization signal associated with the PBCH signal, the associated synchronization signal being a synchronization signal in the at least one synchronization signal.

5. The method according to any one of claims 1-4, characterized in that, The resource mapping manner of the synchronization signal comprises a time domain resource mapping manner, wherein the time domain resource mapping manner comprises at least one of the following: the number of symbols occupied by the PSS is the same as the number of symbols occupied by the SSS; the number of symbols occupied by the PSS is different from the number of symbols occupied by the SSS; the number of symbols occupied by the PSS and the number of symbols occupied by the SSS are adjacent; the symbols occupied by the PSS are before the symbols occupied by the SSS; the symbols occupied by the PSS are after the symbols occupied by the SSS; the symbols occupied by the PSS are repeatedly mapped on time domain resources; the symbols occupied by the SSS are repeatedly mapped on time domain resources.

6. The method according to any one of claims 1-4, characterized in that, The resource mapping manner of the synchronization signal comprises a frequency domain resource mapping manner, wherein the frequency domain resource mapping manner comprises at least one of the following: the number of resource units occupied by the PSS is the same as the number of resource units occupied by the SSS; the number of resource units occupied by the PSS is different from the number of resource units occupied by the SSS; the resource units occupied by the PSS are repeatedly mapped on frequency domain resources, and a first number of resource units are spaced between two adjacent repeated PSSs; the resource units occupied by the SSS are repeatedly mapped on frequency domain resources, and a second number of resource units are spaced between two adjacent repeated SSSs; wherein the first number and the second number are the same or different.

7. The method according to any one of claims 2-6, characterized in that, The resource mapping manner of the synchronization signal and the PBCH signal comprises at least one of the following: The synchronization signal and the PBCH signal are independently mapped on time domain resources, and the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are discontinuous to each other, wherein the information carried by the first two symbols occupied by the PBCH signal is the same. The synchronization signal and the PBCH signal are independently mapped on frequency domain resources, and frequency division multiplexing on the same time domain resource is not supported. The synchronization signal and the PBCH signal are independently mapped on time domain resources, and the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are discontinuous to each other, wherein the information carried by the first two symbols occupied by the PBCH signal is the same. The synchronization signal and the PBCH signal are independently mapped on time domain resources, and the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are discontinuous to each other, wherein the information carried by the first two symbols occupied by the PBCH signal is the same. The synchronization signal and the PBCH signal are independently mapped on time domain resources, and the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are discontinuous to each other, wherein the information carried by the first two symbols occupied The synchronization signal and the PBCH signal are independently mapped on time domain resources, and the symbols 8. The method of any one of claims 2-6, wherein the transmission and resource mapping of the synchronization signal are independent of the transmission of the PBCH signal. The method further comprises:

9. The method according to any one of claims 2-8, characterized in that, transmitting, to a terminal, first information, the first information comprising: a transmission period and resource mapping manner of the synchronization signal, and / or a transmission period and resource mapping manner of the PBCH signal. The method is performed by a terminal, and the method comprises:

10. A communication method characterized by comprising: obtaining a transmission period and resource mapping manner of the synchronization signal; receiving the synchronization signal based on the transmission period and resource mapping manner of the synchronization signal; The synchronization signal comprises a primary synchronization signal (PSS) and a secondary synchronization signal (SSS), and the synchronization signal is independently transmitted with a physical broadcast channel (PBCH) signal. The method further comprises:

11. The method of claim 10, wherein, obtaining a transmission period and resource mapping manner of the PBCH signal; receiving the PBCH signal based on the transmission period and resource mapping manner of the PBCH signal. The method further comprises:

12. The method of claim 11, wherein, receiving first information transmitted by a network device, the first information comprising: a transmission period and resource mapping manner of the synchronization signal, and / or a transmission period and resource mapping manner of the PBCH signal; obtaining the transmission period and resource mapping manner of the synchronization signal, and / or the transmission period and resource mapping manner of the PBCH signal based on the first information.

13. The method of claim 11 or 12, wherein the transmission period of the synchronization signal is different from the transmission period of the PBCH signal; or the transmission period of the synchronization signal is N times the transmission period of the PBCH signal, N being an integer greater than or equal to 2. ​ ​ A transmission period of the PBCH signal is N times of a transmission period of the synchronization signal, where at least one synchronization signal transmitted before the PBCH signal has a corresponding relationship with the PBCH signal, and N is an integer greater than or equal to 1.

14. The method of claim 13, wherein, The corresponding relationship is determined based on at least one of the following: determination based on first indication information included in the at least one synchronization signal, the first indication information being used to indicate a PBCH signal associated with the synchronization signal; determination based on second indication information included in the PBCH signal, the second indication information being used to indicate a synchronization signal associated with the PBCH signal, the associated synchronization signal being a synchronization signal in the at least one synchronization signal.

15. The method according to any one of claims 10-14, characterized in that, The resource mapping manner of the synchronization signal includes a time domain resource mapping manner, where the time domain resource mapping manner includes at least one of the following: a number of symbols occupied by the PSS is the same as a number of symbols occupied by the SSS; a number of symbols occupied by the PSS is different from a number of symbols occupied by the SSS; a number of symbols occupied by the PSS is adjacent to a number of symbols occupied by the SSS; symbols occupied by the PSS are before symbols occupied by the SSS; symbols occupied by the PSS are after symbols occupied by the SSS; symbols occupied by the PSS are repeatedly mapped on time domain resources; symbols occupied by the SSS are repeatedly mapped on time domain resources.

16. The method according to any one of claims 10-14, characterized in that, The resource mapping manner of the synchronization signal includes a frequency domain resource mapping manner, where the frequency domain resource mapping manner includes at least one of the following: a number of resource units occupied by the PSS is the same as a number of resource units occupied by the SSS; a number of resource units occupied by the PSS is different from a number of resource units occupied by the SSS; resource units occupied by the PSS are repeatedly mapped on frequency domain resources, and a first number of resource units are spaced between two adjacent repeated PSSs; resource units occupied by the SSS are repeatedly mapped on frequency domain resources, and a second number of resource units are spaced between two adjacent repeated SSSs; wherein the first number is the same as or different from the second number.

17. The method according to any one of claims 11-16, characterized in that, The resource mapping manner of the synchronization signal and the PBCH signal includes at least one of the following: the synchronization signal and the PBCH signal are independently mapped on time domain resources, and symbols occupied by the synchronization signal and symbols occupied by the PBCH signal are discontinuous with respect to each other, where information carried by the first two symbols occupied by the PBCH signal is the same; the synchronization signal and the PBCH signal are independently mapped on frequency domain resources, and frequency division multiplexing on a same time domain resource is not supported; The synchronization signal and the PBCH signal are associatedly mapped on time domain resources, and the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are continuous to each other, wherein the symbols occupied by the synchronization signal are all before the symbols occupied by the PBCH signal, the PBCH signal is mapped on frequency domain resources by occupying a first symbol, and the resource units occupied by the PBCH signal are part of the resource units in the first symbol, and then the resource units occupied by the PBCH signal are repeatedly mapped until all the resource units in the first symbol are occupied, wherein the first symbol is any symbol occupied by the PBCH signal. The synchronization signal and the PBCH signal are associatedly mapped on time domain resources, and the symbols occupied by the synchronization signal and the symbols occupied by the PBCH signal are discontinuous to each other, wherein the information carried by the first two symbols occupied by the PBCH signal is the same. The synchronization signal and the PBCH signal are associatedly mapped on time domain resources, and the transmission period of the PBCH signal is N times of the transmission period of the synchronization signal, wherein N is an integer greater than or equal to 2.

18. The method of any one of claims 11-16, wherein The transmission and resource mapping of the synchronization signal are independent of the transmission of the PBCH signal.

19. A network device, comprising: The method comprises: a first processing module configured to determine the transmission period and resource mapping mode of the synchronization signal; a first transceiver module configured to transmit the synchronization signal based on the transmission period and resource mapping mode of the synchronization signal. The synchronization signal comprises a primary synchronization signal (PSS) and a secondary synchronization signal (SSS), and the synchronization signal is independently transmitted from a physical broadcast channel (PBCH) signal.

20. A terminal, characterized by The method comprises: a second transceiver module configured to obtain the transmission period and resource mapping mode of the synchronization signal; and receive the synchronization signal based on the transmission period and resource mapping mode of the synchronization signal. The synchronization signal comprises a primary synchronization signal (PSS) and a secondary synchronization signal (SSS), and the synchronization signal is independently transmitted from a physical broadcast channel (PBCH) signal.

21. A communications device, characterized by The method comprises: one or more processors; The processor is configured to perform the communication method of any one of claims 1-9.

22. A communications device, characterized by The method comprises: one or more processors; The processor is configured to perform the communication method of any one of claims 10-18.

23. A communication system, characterized by The method comprises a network device and a terminal, wherein the terminal is configured to implement the method of any one of claims 10-18, and the network device is configured to implement the method of any one of claims 1-9.

24. A computer storage medium, comprising, The computer readable storage medium stores executable instructions, which are loaded and executed by the processor to implement the method of any one of claims 1-9 or 10-18.

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