Communication method, terminal, network device, system and storage medium

Abstract

The present disclosure provides a communication method, a terminal, a network device, a system and a storage medium. The method comprises: receiving a synchronization signal block (SSB) sent by a network device, wherein the SSB is used for access of a first RAT type and / or a second RAT type; receiving downlink control information (DCI) sent by the network device; and on the basis of first information associated with the DCI, determining a RAT type for a terminal to access the network device. The present disclosure improves the reliability of the terminal accessing the network device in a multi-RAT coexistence scenario, helps to promote the development of wireless communication technology, and has high availability.

Description

Communication methods, terminals, network devices, systems, and storage media Technical Field

[0001] This disclosure relates to the field of communications, and in particular to communication methods, terminals, network devices, systems and storage media. Background Technology

[0002] For wireless access networks, cell search is one of the key steps for terminal access. The terminal needs to learn about the network information and the type of Radio Access Technology (RAT) it is accessing through cell search. Summary of the Invention

[0003] To improve the reliability of terminal access to wireless networks, embodiments of this disclosure provide a communication method, a terminal, a network device, a system, and a storage medium.

[0004] According to a first aspect of the present disclosure, a communication method is provided, the method being executed by a terminal, the method comprising:

[0005] Receive synchronization signal block (SSB) sent by the network device, wherein the SSB is used for access of the first radio access technology (RAT) type and / or the second RAT type;

[0006] Receive downlink control information (DCI) sent by the network device;

[0007] Based on the first information associated with the DCI, the RAT type of the terminal accessing the network device is determined.

[0008] According to a second aspect of the present disclosure, a communication method is provided, the method being performed by a network device, the method comprising:

[0009] Send a synchronization signal block (SSB) to the terminal, wherein the SSB is used for access of the first radio access technology RAT type and / or the second RAT type;

[0010] Downlink control information (DCI) is sent to the terminal, and the first information associated with the DCI is used by the terminal to determine the RAT type for accessing the network device.

[0011] According to a third aspect of the present disclosure, a terminal is provided, comprising:

[0012] The transceiver module is configured to receive a synchronization signal block (SSB) sent by a network device, the SSB being used for access of a first radio access technology (RAT) type and / or a second RAT type.

[0013] The transceiver module is also configured to receive downlink control information (DCI) sent by the network device;

[0014] The processing module is configured to determine the RAT type of the terminal accessing the network device based on the first information associated with the DCI.

[0015] According to a fourth aspect of the present disclosure, a network device is provided, comprising:

[0016] The transceiver module is configured to send a synchronization signal block (SSB) to the terminal, the SSB being used for access of a first radio access technology (RAT) type and / or a second RAT type.

[0017] The transceiver module is also configured to send downlink control information (DCI) to the terminal, wherein the first information associated with the DCI is used by the terminal to determine the RAT type for accessing the network device.

[0018] According to a fifth aspect of the present disclosure, a terminal is provided, comprising:

[0019] One or more processors;

[0020] The processor is used to execute the method described in any one of the first aspects.

[0021] According to a sixth aspect of the present disclosure, a network device is provided, comprising:

[0022] One or more processors;

[0023] The processor is used to execute the communication method described in any one of the second aspects.

[0024] According to a seventh aspect of the present disclosure, a communication system is provided, comprising:

[0025] A terminal, the terminal being configured to implement the communication method described in any one of the first aspects;

[0026] A network device configured to implement the communication method described in any one of the second aspects.

[0027] According to an eighth aspect of the present disclosure, a storage medium is provided that stores instructions that, when executed on a communication device, cause the communication device to perform a communication method as described in any one of the first or second aspects.

[0028] According to a ninth aspect of the present disclosure, a computer program product is provided, including a computer program that, when executed by a processor, is used to implement the communication method described in any one of the first or second aspects.

[0029] In the embodiments of this disclosure, when the SSB is used for access of the first wireless access technology RAT type and / or the second RAT type, the terminal can determine the RAT type of the access network device based on the first information associated with the DCI, which improves the reliability of terminal access to network devices in multi-RAT coexistence scenarios, helps to promote the development of wireless communication technology, and has high availability.

[0030] 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

[0031] 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.

[0032] Figure 1A is an exemplary schematic diagram of the architecture of a communication system provided according to an embodiment of the present disclosure.

[0033] Figure 1B is an exemplary structural diagram of an SSB provided according to an embodiment of the present disclosure.

[0034] Figure 2 is an exemplary interactive schematic diagram of a communication method provided according to an embodiment of the present disclosure.

[0035] Figure 3A is one of the exemplary flowcharts of a communication method provided according to an embodiment of the present disclosure.

[0036] Figure 3B is a second exemplary flowchart of a communication method provided according to an embodiment of the present disclosure.

[0037] Figure 4A is an exemplary block diagram of a terminal provided according to an embodiment of the present disclosure.

[0038] Figure 4B is an exemplary block diagram of a network device provided according to an embodiment of the present disclosure.

[0039] Figure 5A is an exemplary schematic diagram of a communication device provided according to an embodiment of the present disclosure.

[0040] Figure 5B is an exemplary schematic diagram of a chip provided according to an embodiment of the present disclosure. Detailed Implementation

[0041] This disclosure provides a communication method, terminal, network device, system, and storage medium.

[0042] In a first aspect, embodiments of this disclosure provide a communication method executed by a terminal, the method comprising: receiving a synchronization signal block (SSB) sent by a network device, the SSB being used for access of a first radio access technology (RAT) type and / or a second RAT type; receiving downlink control information (DCI) sent by the network device; and determining the RAT type of the terminal accessing the network device based on first information associated with the DCI.

[0043] In the above embodiments, when SSB is used for access of the first wireless access technology RAT type and / or the second RAT type, the terminal can determine the RAT type of the terminal accessing the network device based on the first information associated with DCI, which improves the reliability of terminal accessing the network device in multi-RAT coexistence scenarios, helps to promote the development of wireless communication technology, and has high availability.

[0044] In conjunction with some embodiments of the first aspect, in some embodiments, the first information associated with the DCI includes any one of the following: the DCI format; a first Radio Network Temporary Identifier (RNTI), the first RNTI being used to scramble the Cyclic Redundancy Check (CRC) code of the DCI format; and indication information carried in the DCI, the indication information being used to indicate the RAT type.

[0045] In the above embodiments, the first information may include any of the above-mentioned items, which is simple to implement and highly usable.

[0046] In conjunction with some embodiments of the first aspect, in some embodiments, determining the RAT type of the terminal accessing the network device based on the first information associated with the DCI includes any one of the following: if the DCI is detected and received according to a first DCI format, determining the RAT type of the terminal accessing the network device as the first RAT type; if the DCI is detected and received according to a second DCI format, determining the RAT type of the terminal accessing the network device as the second RAT type; if the DCI is detected and received according to a second DCI format and the value of the first RNTI is a first value, determining the RAT type of the terminal accessing the network device as the first RAT type; if the DCI is detected and received according to a second DCI format and the value of the first RNTI is a second value. In the following cases, the RAT type of the terminal accessing the network device is determined to be the second RAT type; if the DCI is detected and received according to the second DCI format, the value of the first RNTI is the second value, and the RAT type indicated by the indication information is the first RAT type, the RAT type of the terminal accessing the network device is determined to be the first RAT type; if the DCI is detected and received according to the second DCI format, the value of the first RNTI is the second value, and the RAT type indicated by the indication information is the second RAT type, the RAT type of the terminal accessing the network device is determined to be the second RAT type; wherein, the first DCI format is the DCI format under the first RAT type, and the second DCI format is the DCI format under the second RAT type.

[0047] In the above embodiments, the terminal can determine the RAT type of the network device accessed by the terminal based on the first information, which improves the reliability of terminal access to network devices in scenarios with multiple RATs coexisting, helps to promote the development of wireless communication technology, and has high availability.

[0048] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes at least one of the following: determining the first value based on a predefined method; determining the first value based on a cell identifier and an offset.

[0049] In the above embodiments, the first value can be determined based on at least one of the above methods, which is simple to implement and highly usable.

[0050] In conjunction with some embodiments of the first aspect, in some embodiments, the indication information occupies reserved bits in the DCI.

[0051] In the above embodiments, the indication information can occupy reserved bits in the DCI, avoiding the increase of DCI bits, avoiding resource waste, and ensuring high availability.

[0052] In conjunction with some embodiments of the first aspect, in some embodiments, when the bit value of the reserved bit is a third value, the RAT type indicated by the indication information is a first RAT type.

[0053] In the above embodiments, the terminal can determine the RAT type indicated by the indication information based on the bit value of the reserved bit, which is simple to implement and highly usable.

[0054] In some embodiments, in conjunction with the first aspect, the method further includes: determining the RAT type of the terminal accessing the network device as the first RAT type when the received DCI satisfies the first condition.

[0055] In the above embodiments, if the received DCI meets the first condition, the terminal can determine that the RAT type of the network device accessed by the terminal is the first RAT type. This improves the reliability of terminal access to network devices in multi-RAT coexistence scenarios, helps promote the development of wireless communication technology, and has high availability.

[0056] In conjunction with some embodiments of the first aspect, in some embodiments, the first condition includes at least one of the following: detecting and receiving DCIs corresponding to the first RAT type and the second RAT type respectively within the same search space; detecting and receiving DCIs corresponding to the first RAT type within a search space.

[0057] In the above embodiments, the first condition includes, but is not limited to, at least one of the above conditions, which improves the reliability of terminal access to network devices in multi-RAT coexistence scenarios, helps to promote the development of wireless communication technology, and has high availability.

[0058] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes: if the RAT type of the terminal accessing the network device cannot be determined based on the first information, determining that the RAT type of the terminal accessing the network device is a second RAT type.

[0059] In the above embodiments, if the RAT type of the terminal accessing the network device cannot be determined based on the first information, the terminal can determine that the RAT type of the terminal accessing the network device is the second RAT type. This improves the reliability of terminal access to network devices in scenarios with multiple RATs coexisting, helps promote the development of wireless communication technology, and offers high availability.

[0060] In conjunction with some embodiments of the first aspect, in some embodiments, receiving the downlink control information (DCI) sent by the network device includes: receiving the DCI sent by the network device within a first search space, wherein the first search space includes any one of the following: a search space indicated by a master information block (MIB); a search space indicated by a system message; or a search space indicated by terminal-specific signaling.

[0061] In the above embodiments, the terminal can receive DCI within any of the first search spaces, thereby improving the reliability of the terminal accessing network devices.

[0062] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0063] Based on the determined RAT type, the network device is accessed and a first operation is performed, the first operation including at least one of the following: information sending operation; information receiving operation; measurement operation; measurement result reporting operation.

[0064] In the above embodiments, the terminal can access the network device based on the determined RAT type in order to perform the first operation. The reliability of terminal access to the network device in the scenario of multiple RATs coexisting helps to promote the development of wireless communication technology and has high availability.

[0065] Secondly, embodiments of this disclosure provide a communication method executed by a network device, the method comprising: sending a synchronization signal block (SSB) to a terminal, the SSB being used for access of a first radio access technology (RAT) type and / or a second RAT type; and sending downlink control information (DCI) to the terminal, the first information associated with the DCI being used by the terminal to determine the RAT type for accessing the network device.

[0066] In conjunction with some embodiments of the second aspect, in some embodiments, the first information includes any one of the following: a DCI format; a first Radio Network Temporary Identifier (RNTI), the first RNTI being used to scramble a Cyclic Redundancy Check (CRC) code in the DCI format; and indication information carried in the DCI, the indication information being used to indicate a RAT type.

[0067] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes at least one of the following: determining a first value based on a predefined method; determining a first value based on a cell identifier and an offset; wherein the first value is the value of the first RNTI when the RAT type of the terminal accessing the network device is the first RAT type.

[0068] In conjunction with some embodiments of the second aspect, in some embodiments, the indication information occupies reserved bits in the DCI.

[0069] In conjunction with some embodiments of the second aspect, in some embodiments, when the RAT type of the terminal accessing the network device is the first RAT type, the bit value of the reserved bit is a third value.

[0070] In conjunction with some embodiments of the second aspect, in some embodiments, sending downlink control information (DCI) to the terminal includes any one of the following: sending DCI corresponding to the first RAT type and the second RAT type to the terminal within the same search space; or sending DCI corresponding to the first RAT type to the terminal within a search space.

[0071] In conjunction with some embodiments of the second aspect, in some embodiments, sending downlink control information (DCI) to the terminal includes: sending the DCI to the terminal within a first search space, wherein the first search space includes any one of the following: a search space indicated by a master information block (MIB); a search space indicated by a system message; or a search space indicated by terminal-specific signaling.

[0072] Thirdly, embodiments of this disclosure provide a terminal, comprising: a transceiver module configured to receive a synchronization signal block (SSB) sent by a network device, the SSB being used for access of a first radio access technology (RAT) type and / or a second RAT type; the transceiver module is further configured to receive downlink control information (DCI) sent by the network device; and a processing module configured to determine the RAT type of the terminal accessing the network device based on first information associated with the DCI.

[0073] Fourthly, embodiments of this disclosure provide a network device, including: a transceiver module configured to send a synchronization signal block (SSB) to a terminal, the SSB being used for access of a first radio access technology (RAT) type and / or a second RAT type; the transceiver module is further configured to send downlink control information (DCI) to the terminal, the first information associated with the DCI being used by the terminal to determine the RAT type for accessing the network device.

[0074] Fifthly, embodiments of this disclosure provide a terminal comprising: one or more processors; wherein the processors are configured to execute the communication method described in any one of the first aspects.

[0075] In a sixth aspect, embodiments of this disclosure provide a network device comprising: one or more processors; wherein the processors are configured to perform the communication method described in any one of the second aspects.

[0076] In a seventh aspect, embodiments of this disclosure provide a communication system comprising: a terminal configured to perform the communication method described in any one aspect; and a network device configured to perform the communication method described in any one aspect.

[0077] 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 communication method as described in either the first or second aspect.

[0078] In a ninth aspect, embodiments of this disclosure provide a computer program product, including a computer program that, when executed by a processor, is used to implement the communication method described in any one of the first or second aspects.

[0079] It is understood that the aforementioned terminals, network devices, communication systems, and storage media 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.

[0080] This disclosure provides communication methods, terminals, network devices, systems, and storage media. In some embodiments, the terms "communication method" and "information transmission method," "information processing method," etc., can be used interchangeably; the terms "communication device" and "information transmission device," "information processing device," etc., can be used interchangeably; and the terms "information transmission system," "information processing system," "communication system," etc., can be used interchangeably.

[0081] This disclosure is not exhaustive, but merely illustrative of some embodiments, and is not intended to limit the scope of protection of this disclosure. 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.

[0082] 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.

[0083] 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 scope of this disclosure.

[0084] In this disclosure, unless otherwise stated, elements expressed in the singular form, such as "a," "an," "the," "the aforementioned," "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 or a plural expression.

[0085] In the embodiments disclosed herein, "multiple" refers to two or more.

[0086] In some embodiments, the terms “at least one of”, “one or more”, “a plurality of”, “multiple”, etc., may be used interchangeably.

[0087] In some embodiments, the notation "at least one of A and B", "A and / or B", "A in one case, B in another", "in response to one case A, in response to another case B", etc., may include the following technical solutions depending on the situation: in some embodiments, A (execute A regardless of B); in some embodiments, B (execute B regardless of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, A and B (both A and B are executed). The same applies when there are more branches such as A, B, C, etc.

[0088] In some embodiments, the notation "A or B" may include the following technical solutions, depending on the situation: in some embodiments, A (execution of A regardless of B); in some embodiments, B (execution of B regardless of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The same applies when there are more branches such as A, B, C, etc.

[0089] 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. Similarly, if the object being described is "information", then "first information" and "second information" can be the same information or different information, and their content can be the same or different.

[0090] In some embodiments, “including A,” “containing A,” “for indicating A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0091] In some embodiments, the apparatus and device may be interpreted as physical or virtual, and their names are not limited to those described in the embodiments. In some cases, they may also be understood as "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "entity", "body", etc.

[0092] In some embodiments, the acquisition of data, information, etc., may comply with the laws and regulations of the country where the location is situated.

[0093] In some embodiments, data, information, etc., may be obtained with the user's consent.

[0094] Furthermore, each element, each row, or each column in the table of this disclosure can be implemented as an independent embodiment, and any combination of any element, any row, or any column can also be implemented as an independent embodiment.

[0095] Figure 1A is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure.

[0096] As shown in Figure 1A, the communication system 100 includes a terminal 101 and a network device 102.

[0097] In some embodiments, terminal 101 includes, for example, 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, but is not limited thereto.

[0098] In some embodiments, network device 102 may include at least one of access network device 102-1 and core network device 102-2.

[0099] In some embodiments, the access network device 102-1 is, for example, a node or device that connects a terminal to a wireless network. The access network device may include at least one of the following in a 5G communication system: an evolved Node B (eNB), a next-generation eNB (ng-eNB), a next-generation Node B (gNB), a node B (NB), a home node B (HNB), a home evolved node B (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open RAN, a cloud RAN, a base station in other communication systems, and an access node in a Wi-Fi system, but is not limited thereto.

[0100] 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 access 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.

[0101] In some embodiments, the access network device 102-2 may be composed of a central unit (CU) and a distributed unit (DU). The CU may also be called a control unit. By adopting the CU-DU structure, the protocol layer of the access network device can be separated. 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, which is centrally controlled by the CU. However, this is not the only possibility.

[0102] In some embodiments, the core network device 102-2 may be a single device, including a first network element, a second network element, etc., or it may be multiple devices or a group of devices, each including all or part of the first network element, the second network element, etc. Network elements may be virtual or physical. The core network may include, for example, at least one of the Evolved Packet Core (EPC), 5G Core Network (5GCN), and Next Generation Core (NGC).

[0103] 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.

[0104] 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. Each main body may be physical or virtual. 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.

[0105] 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, systems utilizing other communication methods, 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).

[0106] In some embodiments, cell search includes three steps: receiving a synchronization signal and PBCH block (SSB); receiving system messages, such as System Information Block 1 (SIB1) and other system information (OSI); and receiving paging messages.

[0107] After completing the above steps, the terminal can access and camp on the wireless network. Receiving the Physical Broadcast Channel (PBCH), Primary Synchronization Signal (PSS), and Secondary Synchronization Signal (SSS) is the first step in cell search. The terminal needs to complete downlink coarse synchronization based on the PSS and SSS to obtain frame timing; the terminal also needs to receive the Master Information Block (MIB) information carried on the PBCH to obtain the most critical network configuration information. Due to the importance and special nature of PBCH, PSS, and SSS, they are often core design elements of each generation of systems. The terminal can determine the RAT type to access through different SSB designs. Considering the inconsistencies in the commercial pace of different generations of systems and the remaining room for performance improvement in existing systems, the coexistence of multiple RATs will be a long-term phenomenon in wireless communication systems, such as the coexistence of 4G, 5G, and 6G systems, or the coexistence of 5G and 6G systems.

[0108] Designing a new SSB structure for 6G systems would reduce spectral efficiency. Furthermore, in low-frequency scenarios where 5G and 6G coexist, the motivation to design a new SSB is not significant. Therefore, one possible mitigation technique for 5G / 6G systems is to allow 5G and 6G systems to share the same SSB signal within a specific frequency band, meaning 6G terminals also access the wireless network through the SSB defined in the 5G system.

[0109] In some embodiments, SSB and SIB1 are periodically transmitted at determined time-frequency resource locations according to a period predefined by the protocol and / or configured on the network device side.

[0110] SSB:

[0111] An SSB occupies four consecutive Orthogonal Frequency Division Multiplexing (OFDM) symbols in the time domain, including PSS, SSS, and PBCH. New Radio (NR) systems support five SSB time-domain transmission cases, namely cases A through E. The time-domain pattern of a case depends on factors such as the SSB's subcarrier spacing (SCS), operating frequency, Time-Division Duplex (TDD), and / or Frequency-Division Duplex (FDD) standard. Different SSB cases correspond to the number of SSBs within an SSB burst and their time-domain resource location within the burst. The duration of an SSB burst is 5 milliseconds (ms). Typically, the SSB transmission period is 20 ms. Furthermore, network devices, such as base stations, can configure the SSB transmission period and time-domain pattern using information carried in SIB1; the maximum SSB transmission period is 160 ms. The SSB schematic diagram is shown in Figure 1B.

[0112] In some embodiments, the Physical Random Access Channel (PRACH) determines the time-frequency resources available for PRACH transmission based on configuration information provided by SIB1 or UE-dedicated RRC signaling. The terminal and base station, based on the configuration information, further determine the valid RACH Occasion (valid RO) that can actually be used for PRACH transmission, according to information such as TDD structure, SSB time-domain location, and downlink transmission. Further, the base station and terminal determine the mapping relationship between SSBs and ROs based on the aforementioned configuration, SSB configuration, and valid ROs, enabling the terminal to send a preamble bound to its associated SSB on the determined valid RO according to its own needs. The PRACH resource configuration information is configured through semi-static signaling and cannot be dynamically adjusted.

[0113] In some embodiments, the slot in which the paging transmission occurs can be determined according to the configuration information provided by SIB1. Specifically, the terminal and the base station determine, based on the configuration information, the paging frame in which the paging transmission occurs within a discontinuous reception cycle (DRX cycle), the paging occupancy (PO) within the paging frame, and the paging monitor occupancy (PMO) included within the PO.

[0114] In some embodiments, 6G and 5G terminals can access the wireless network based on the detection of the same SSB. For 5G terminals, their behavior does not need to be differentiated; they will perform subsequent transmission, reception, measurement, and reporting operations according to 5G technology. For 6G terminals, if they are backward compatible with 5G systems, they need to distinguish the current network type; if they are not compatible with 5G networks, they also need to determine the current RAT type and complete subsequent transmission, reception, measurement, and reporting operations according to 6G-related technologies.

[0115] Since the SSBs of 5G and 6G systems are exactly the same and carry the same information, 6G terminals cannot determine the current network type by detecting and receiving the SSB, and therefore cannot complete subsequent related operations.

[0116] To improve the reliability of terminal access to network devices in scenarios with multiple RATs coexisting, this disclosure provides the following communication method, terminal, network device, system, and storage medium.

[0117] 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 embodiments of the present disclosure relate to a communication method, which includes:

[0118] In step S2101, network device 102 sends an SSB to terminal 101.

[0119] In some embodiments, terminal 101 receives SSB.

[0120] In some embodiments, the SSB may occupy four consecutive OFDM symbols in the time domain, and the SSB may include PBCH, PSS and SSS.

[0121] In some embodiments, the time-domain transmission case of the SSB may include any one of case A to case E, as shown in Figure 1B.

[0122] In some embodiments, the SSB can be used for access of a first RAT type and / or a second RAT type. In other words, network device 102 supports terminals accessing network device 102 using the first RAT type access method. Alternatively, network device 102 supports terminals accessing network device 102 using the second RAT type access method.

[0123] In some embodiments, the SSB can be used for both first-RAT type access and second-RAT type access. In other words, the same SSB can be used for both first-RAT type and second-RAT type access. Therefore, regardless of whether network device 102 supports the terminal accessing network device 102 using the first-RAT type or the second-RAT type, the same SSB can be sent. Alternatively, based on the sent SSB, the terminal uses subsequent steps to determine whether network device 102 supports it using the first-RAT type or the second-RAT type access method.

[0124] In some embodiments, SSB for access of the first RAT type and / or the second RAT type may mean that under the first RAT type and the second RAT type, the transmission period, time domain pattern, etc. of the SSB are the same, and the information carried by the SSB is also the same, so the terminal 101 cannot determine the RAT type of the access network device 102 by detecting and receiving the SSB.

[0125] In some embodiments, an SSB for access in a first RAT type and / or a second RAT type may refer to an SSB defined for one of the RAT types, and may be used for cell search under another RAT type.

[0126] For example, SSB is an SSB defined in 5G systems and can be used by 6G terminals for cell search.

[0127] In some embodiments, the first RAT type may be 6G, or future mobile communication technologies such as 7G, ​​8G, 9G, etc.

[0128] The first RAT type is backward compatible with other RAT types, such as the second RAT type.

[0129] The first RAT type is 6G, and the second RAT type can be 5G. If the first RAT type is 7G, ​​8G, or 9G, the second RAT type can be a RAT type that is compatible with the first RAT type, such as 6G, 7G, or 8G.

[0130] The above is merely an illustrative example, and this disclosure does not limit the types of RATs involved.

[0131] In some embodiments, network device 102 sends SSB to terminal 101 based on a specific period. The specific period may be determined based on a predefined method and / or configured by network device 102, which is not limited in this disclosure.

[0132] In some embodiments, network device 102 may send SSB to terminal 101 to assist terminal 101 in completing access and / or downlink coarse synchronization, etc.

[0133] In some embodiments, network device 102 may send an SSB to terminal 101 in order to provide network configuration information to terminal 101.

[0134] The above is merely an illustrative example, and this disclosure does not limit the timing or conditions under which the network device 102 sends an SSB.

[0135] In step S2102, network device 102 sends downlink control information (DCI) to terminal 101.

[0136] In some embodiments, terminal 101 receives DCI.

[0137] In some embodiments, terminal 101 determines the RAT type of the network device 102 accessed by terminal 101 based on the first information associated with DCI.

[0138] In some embodiments, network device 102 may send the DCI to terminal 101 within a first search space.

[0139] In one example, the first search space could be the search space indicated by the MIB.

[0140] For example, network device 102 may carry MIB on PBCH in SSB, and the search space indicated by the MIB may serve as a first search space, within which network device 102 sends DCI to terminal 101.

[0141] For example, the search space (SS) indicated by the MIB, i.e., the first search space, can be SS#0.

[0142] SS#0 is the search space corresponding to the initial partial bandwidth (BWP) used by terminal 101.

[0143] In one example, the first search space may be the search space indicated by a system message, wherein the system message may be, for example, but not limited to, a System Information Block (SIB), and the SIB may include, but is not limited to, SIB1, OSI, etc.

[0144] For example, the first search space indicated by the system message may include, but is not limited to, at least one of the following: the common search space of the physical downlink control channel of type 0 (Type 0-PDCCH CSS), the common search space of the physical downlink control channel of type 0A (Type 0A-PDCCH CSS), the common search space of the physical downlink control channel of type 0B (Type 0B-PDCCH CSS), the common search space of the physical downlink control channel of type 1 (Type 1-PDCCH CSS), and the common search space of the physical downlink control channel of type 2 (Type 2-PDCCH CSS).

[0145] In one example, the first search space may be the search space indicated by terminal-specific signaling.

[0146] Terminal-specific signaling may include, but is not limited to, Radio Resource Control (RRC) signaling.

[0147] The search space indicated by the terminal-specific signaling may include, but is not limited to, at least one of the following: UE-Specific Search Space (USS); group Common Search Space (group CSS).

[0148] The above is merely an illustrative example, and this disclosure does not limit the type of the first search space.

[0149] In some embodiments, network device 102 may send DCIs corresponding to the first RAT type and the second RAT type to terminal 101 within the same search space.

[0150] For example, network device 102 can send the DCI corresponding to 5G and 6G respectively to terminal 101 within the first search space.

[0151] In some embodiments, network device 102 may send DCI corresponding to the first RAT type to terminal 101 within a search space.

[0152] For example, network device 102 can send the DCI corresponding to 6G to terminal 101 within the first search space.

[0153] In some embodiments, network device 102 may send DCI to terminal 101 when SSB is used for access of a first RAT type and / or a second RAT type.

[0154] In some embodiments, in order to improve the reliability of terminal 101 accessing network device 102, network device 102 may send DCI to terminal 101.

[0155] In some embodiments, if the network device 102 determines that the terminal 101 cannot determine the current RAT type based on the SSB, it may send a DCI to the terminal 101.

[0156] The above is merely an illustrative example, and this disclosure does not limit the timing or conditions under which the network device 102 sends DCI to the terminal 101.

[0157] In step S2103, terminal 101 determines the RAT type of the network device 102 to which terminal 101 accesses.

[0158] In some embodiments, terminal 101 may determine the RAT type of access network device 102 from a first RAT type and a second RAT type.

[0159] In some embodiments, terminal 101 may determine the RAT type of access network device 102 based on the first information associated with DCI.

[0160] In some embodiments, the first information associated with the DCI may include, but is not limited to, any of the following: the DCI format; the first Radio Network Temporary Identity (RNTI); and indication information carried in the DCI.

[0161] In one example, different RAT types can correspond to different DCI formats, and terminal 101 can determine the RAT type of access network device 102 based on the received DCI format.

[0162] For example, the first information associated with DCI includes the DCI format. Terminal 101 can determine that the RAT type accessing the network device 102 is the first RAT type if it detects and receives the DCI according to the first DCI format. The first DCI format is the DCI format under the first RAT type; for example, the first DCI format is a 6G-specific DCI format.

[0163] Additionally, terminal 101 can determine that the RAT type of the network device 102 accessing the network is the second RAT type if it detects and receives the DCI according to the second DCI format. The second DCI format is the DCI format under the second RAT type, for example, the second DCI format is an existing DCI format in 5G.

[0164] For example, SSB is used for 5G or 6G access, with 5G and 6G corresponding to different DCI formats. Terminal 101 detects and receives DCI according to the 6G-specific DCI format. If the corresponding DCI is detected and received, terminal 101 determines that the RAT type of the network device 102 accessing the network is 6G. Terminal 101 also detects and receives DCI according to the 5G DCI format. If the corresponding DCI is detected and received, terminal 101 determines that the RAT type of the network device 102 accessing the network is 5G.

[0165] For example, the first information associated with DCI includes a first RNTI, which can be used to scramble the Cyclic Redundancy Check (CRC) code in DCI format. Terminal 101 can determine the RAT type of access network device 102 based on the value of the first RNTI.

[0166] Specifically, terminal 101 can detect and receive DCI according to a second DCI format, such as the DCI format in a 5G system. Further, it determines the value of the first RNTI that scrambles the CRC code. If the value of the first RNTI is the first value, it determines that the RAT type of the network device 102 is the first RAT type, such as 6G.

[0167] Specifically, terminal 101 can detect and receive DCI according to a second DCI format, such as the DCI format in a 5G system. Further, it determines the value of the first RNTI that scrambles the CRC code. If the value of the first RNTI is the second value, it determines that the RAT type of the network device 102 is the second RAT type, such as 5G.

[0168] The second DCI format is the DCI format under the second RAT type.

[0169] The first value can be determined based on a predefined method, such as by agreement.

[0170] The first value can be determined based on the cell identifier and the offset.

[0171] This disclosure does not limit the specific value or method of determining the first value.

[0172] For example, SSB is used for 5G or 6G access. The terminal detects and receives DCI according to the 5G DCI format. If the value of the first RNTI scrambled with the CRC code of the DCI format is a first value, then terminal 101 determines that the RAT type of accessing the network device 102 is 6G. If the value of the first RNTI scrambled with the CRC code of the DCI format is a second value, then terminal 101 determines that the RAT type of accessing the network device 102 is 5G.

[0173] For example, the first information associated with the DCI includes indication information, which can be used to indicate the RAT type. Terminal 101 can determine the RAT type of the access network device 102 based on the indication information carried in the DCI.

[0174] Specifically, terminal 101 can detect and receive DCI according to the DCI format defined in the 5G system. If the CRC code of the DCI format is scrambled based on the RNTI defined in 5G, that is, the value of the first RNTI is the second value, terminal 101 can determine the RAT type indicated by the indication information as the RAT type for accessing the network device.

[0175] For example, if the indication information indicates 6G, the terminal determines that the RAT type of the access network device is 6G; if the indication information indicates 5G, the terminal determines that the RAT type of the access network device is 5G.

[0176] This indication information can occupy reserved bits in the DCI. Network device 102 refarms the reserved bits to indicate the RAT type.

[0177] Where the value of the reserved bit is the third value, the RAT type indicated by the indication information is the first RAT type.

[0178] The third value can be either "0" or "1", and this disclosure does not limit it. The third value can be determined based on a predefined method and / or the instructions of network device 102, and this disclosure also does not limit it.

[0179] For example, SSB is used for 5G or 6G access. The terminal detects and receives the DCI according to the 5G DCI format and determines that the value of the first RNTI is the second value, which is the value of CRC code scrambling defined in 5G. If the value of the reserved bit in the DCI is set to "1", the RAT type indicated by the indication information is 6G, and the terminal 101 determines that the RAT type of accessing the network device 102 is 6G. If the value of the reserved bit in the DCI is set to "0", the RAT type indicated by the indication information is 5G, and the terminal 101 determines that the RAT type of accessing the network device 102 is 5G.

[0180] The above is merely an illustrative example, and this disclosure does not limit the method by which terminal 101 determines the RAT type of the network device 102.

[0181] In some embodiments, the name of the first information is not limited and can be interchanged with "DCI related information" or "DCI information".

[0182] In some embodiments, if the received DCI meets a first condition, the terminal 101 determines that the RAT type of the network device accessing the network device is a first RAT type.

[0183] In one example, the first condition may include, but is not limited to, at least one of the following: detecting and receiving DCIs corresponding to the first RAT type and the second RAT type respectively within the same search space; detecting and receiving DCIs corresponding to the first RAT type within a search space.

[0184] Among them, terminal 101 is a terminal that supports the first RAT type. If terminal 101 receives DCI corresponding to the first RAT type and the second RAT type in the first search space, then terminal 101 determines that the RAT type of the network device accessed is the first RAT type.

[0185] For example, SSB is used for 5G access or 6G access, and terminal 101 is a 6G terminal. If terminal 101 detects and receives DCI corresponding to 5G and 6G respectively in the first search space, such as receiving DCI of 5G DCI format and 6G dedicated DCI format, then terminal 101 determines that the RAT type of the network device accessed is 6G.

[0186] For example, if SSB is used for 5G or 6G access, and terminal 101 is a 6G terminal, if terminal 101 receives DCIs corresponding to 5G and 6G respectively in the first search space, for example, if it receives two DCIs, and the CRC code of one DCI format is scrambled with the first RNTI value, and the CRC code of the other DCI format is scrambled based on the RNTI defined in 5G, then terminal 101 determines that the RAT type of the network device accessed is 6G.

[0187] For example, if SSB is used for 5G or 6G access, and terminal 101 is a 6G terminal, if terminal 101 receives DCIs corresponding to 5G and 6G respectively in the first search space, for example, if it receives two DCIs, where at least one DCI carries an indication information indicating a RAT type of 5G and the other DCI carries an indication information indicating a RAT type of 6G, then terminal 101 determines that the RAT type of the network device accessed is 6G.

[0188] If terminal 101 receives only the DCI corresponding to the first RAT type in the first search space, then terminal 101 determines that the RAT type accessing the network device is the first RAT type.

[0189] For example, SSB is used for 5G or 6G access, and terminal 101 is a 6G terminal. If terminal 101 receives a 6G-specific DCI in the first search space, such as receiving a DCI in a 6G dedicated DCI format, then terminal 101 determines that the RAT type of the network device accessing the network is 6G.

[0190] For example, if SSB is used for 5G or 6G access, and terminal 101 is a 6G terminal, if terminal 101 receives the DCI corresponding to 6G in the first search space, for example, the value of the first RNTI scrambled by the CRC code of the DCI format is the first value, then terminal 101 determines that the RAT type of the network device accessing the network is 6G.

[0191] For example, if SSB is used for 5G or 6G access and terminal 101 is a 6G terminal, if terminal 101 receives a DCI corresponding to 6G in the first search space, for example, if the RAT type indicated by the indication information carried in the received DCI is 6G, then terminal 101 determines that the RAT type of the network device accessed is 6G.

[0192] In some embodiments, if terminal 101 cannot determine the RAT type of the terminal accessing the network device 102 based on the first information, then terminal 101 determines that the RAT type of the terminal accessing the network device is the second RAT type.

[0193] For example, network device 102 sends the corresponding DCI in the search space corresponding to different RAT types. For example, it sends the DCI corresponding to 5G in search space #1 corresponding to 5G and the DCI corresponding to 6G in search space #2 corresponding to 6G. However, there is an overlap between search space #1 and search space #2. Terminal 101 receives two DCIs corresponding to two RAT types in the overlapping space. At this time, terminal 101 cannot determine the RAT type of the access network device 102 based on the first information. Then, the terminal can determine that the RAT type of the access network device is the second RAT type, for example, determine that the RAT type of the access network device is 5G.

[0194] The above is merely an illustrative example, and this disclosure does not limit the method by which terminal 101 determines the RAT type of the network device 102.

[0195] In step S2104, terminal 101 connects to network device 102 and performs the first operation.

[0196] In some embodiments, terminal 101 may access network device 102 based on the determined RAT type. Further, after accessing network device 102, a first operation may be performed, which may include, but is not limited to, at least one of the following: information sending operation, information receiving operation, measurement operation, and measurement result reporting operation.

[0197] The information transmission operation includes, but is not limited to, sending uplink data and / or uplink signaling to network device 102.

[0198] The information receiving operation includes, but is not limited to, receiving downlink data and / or downlink signaling sent by network device 102.

[0199] The measurement operations include, but are not limited to, cell measurement operations and reference signal measurement operations.

[0200] The measurement result reporting operation may include reporting the measurement results obtained from performing the measurement operation to network device 102.

[0201] In some embodiments, step S2104 is an optional step. For example, if terminal 101 cannot determine the RAT type of the network device 102 it accesses based on the first information, terminal 101 may choose not to access the network device 102. Exemplarily, in this case, terminal 101 may access other network devices to perform the subsequent first operation.

[0202] In some embodiments, the names of information, etc., are not limited to the names described in the embodiments. Terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "codebook", "codeword", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

[0203] In some embodiments, terms such as “send,” “transmit,” “report,” “distribute,” “transfer,” “bidirectional transmission,” “send and / or receive” can be used interchangeably.

[0204] In some embodiments, “get,” “obtain,” “receive,” “transmit,” “bidirectional transmission,” and “send and / or receive” can be used interchangeably and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from higher layers, obtaining through self-processing, or autonomous implementation, among other meanings.

[0205] 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.

[0206] In some embodiments, the communication method involved in this disclosure may include at least one of steps S2101 to S2104. For example, step S2101 may be implemented as a standalone embodiment, step S2102 may be implemented as a standalone embodiment, step S2101+S2102 may be implemented as a standalone embodiment, step S2103 may be implemented as a standalone embodiment, step S2101+S2102+S2103 may be implemented as a standalone embodiment, step S2104 may be implemented as a standalone embodiment, and steps S2101 to S2104 may be implemented as standalone embodiments, but are not limited thereto.

[0207] In some embodiments, steps S2101 to S2104 are optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0208] In some embodiments, the execution order of steps S2101 to S2104 is not limited.

[0209] The above embodiments improve the reliability of terminal access to network devices in multi-RAT coexistence scenarios, which helps to promote the development of wireless communication technology and has high availability.

[0210] Figure 3A is a flowchart illustrating a communication method according to an embodiment of the present disclosure. As shown in Figure 3A, the present disclosure relates to a communication method that can be executed by a terminal 101, and the method includes:

[0211] Step S3101: Obtain SSB.

[0212] In some embodiments, SSB is used for access of a first RAT type and / or a second RAT type.

[0213] In some embodiments, optional implementations of step S3101 can be found in optional implementations of step S2101 in FIG2 and other related parts in the embodiments involved in FIG2, which will not be repeated here.

[0214] In some embodiments, terminal 101 receives an SSB sent by network device 102, but is not limited thereto. Terminal 101 may also receive an SSB sent by other entities, such as relay devices or other devices. In this case, step S3101 may be omitted.

[0215] In some embodiments, terminal 101 obtains the SSB specified by the protocol, in which case step S3101 is omitted.

[0216] In some embodiments, terminal 101 obtains SSB from upper layer(s), in which case step S3101 is omitted.

[0217] In some embodiments, the terminal 101 performs processing to obtain the SSB, in which case step S3101 is omitted.

[0218] In some embodiments, the terminal 101 autonomously implements the function indicated by the SSB, or the above function is the default or default, in which case step S3101 is omitted.

[0219] Step S3102: Obtain DCI.

[0220] In some embodiments, optional implementations of step S3102 can be found in optional implementations of step S2102 in FIG2 and other related parts in the embodiments involved in FIG2, which will not be repeated here.

[0221] In some embodiments, terminal 101 receives DCI sent by network device 102, but is not limited thereto. Terminal 101 may also receive DCI sent by other entities, such as relay devices or other devices. In this case, step S3102 may be omitted.

[0222] In some embodiments, terminal 101 obtains the DCI specified by the protocol, in which case step S3102 is omitted.

[0223] In some embodiments, the terminal 101 obtains the DCI from the upper layer(s), in which case step S3102 is omitted.

[0224] In some embodiments, the terminal 101 performs processing to obtain the DCI, in which step S3102 is omitted.

[0225] In some embodiments, the terminal 101 autonomously implements the function indicated by the DCI, or the above function is the default or default, in which case step S3102 is omitted.

[0226] Step S3103: Determine the RAT type of the network device 102 accessed by terminal 101.

[0227] In some embodiments, optional implementations of step S3103 can be found in optional implementations of step S2103 in FIG2 and other related parts in the embodiments involved in FIG2, which will not be repeated here.

[0228] In some embodiments, steps S3101 to S3103 are optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0229] In some embodiments, the execution order of steps S3101 to S3103 is not limited.

[0230] The above embodiments improve the reliability of terminal access to network devices in multi-RAT coexistence scenarios, which helps to promote the development of wireless communication technology and has high availability.

[0231] Figure 3B is a flowchart illustrating a communication method according to an embodiment of the present disclosure. As shown in Figure 3B, the present disclosure relates to a communication method that can be executed by a network device 102, and the method includes:

[0232] Step S3201: Send SSB.

[0233] In some embodiments, SSB is used for access of a first RAT type and / or a second RAT type.

[0234] In some embodiments, network device 102 sends an SSB to terminal 101.

[0235] In some embodiments, terminal 101 receives SSB.

[0236] In some embodiments, optional implementations of step S3201 can be found in optional implementations of step S2101 in FIG2 and other related parts in the embodiments involved in FIG2, which will not be repeated here.

[0237] Step S3202: Send DCI.

[0238] In some embodiments, network device 102 sends DCI to terminal 101.

[0239] In some embodiments, terminal 101 receives DCI.

[0240] In some embodiments, optional implementations of step S3202 can be found in optional implementations of step S2102 in FIG2 and other related parts in the embodiments involved in FIG2, which will not be repeated here.

[0241] In some embodiments, steps S3201 to S3202 are optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0242] In some embodiments, the execution order of steps S3201 to S3202 is not limited.

[0243] The above embodiments improve the reliability of terminal access to network devices in multi-RAT coexistence scenarios, which helps to promote the development of wireless communication technology and has high availability.

[0244] The above process is further illustrated with examples below.

[0245] In this embodiment of the disclosure, the terminal can determine the type of wireless access technology currently accessed based on the received DCI detected in a specified search space; the network device sends DCIs of different RATs in the same search space.

[0246] Terminal side:

[0247] A terminal supporting 6G technology, after detecting and receiving an SSB, determines the radio access network type by detecting the received DCI in the subsequent search space. After determining the radio access network type, the terminal performs subsequent operations such as sending, receiving, measuring, and reporting based on the radio access network type.

[0248] Method 1, wherein the search space is the search space indicated by the indication information carried in the MIB.

[0249] The search space is SS#0 indicated by the information carried in the MIB.

[0250] The terminal determines the current wireless access technology type in the search space using any of the following methods:

[0251] Method 1-1: The terminal detects and receives the DCI according to the 6G-specific DCI format. If the terminal detects and receives the corresponding 6G-specific DCI format, the terminal determines that the wireless access network type is a 6G network.

[0252] Method 1-2: The terminal detects and receives the DCI format according to the DCI format defined in the 5G system. If the CRC of the DCI format is scrambled according to the RNTI defined in 6G technology, the terminal determines that the wireless access network type is a 6G network.

[0253] This embodiment does not limit the value and determination method of the 6G specific RNTI value.

[0254] For example, the 6G specific RNTI value can be implemented in a predefined manner or determined by adding an offset to the cell ID.

[0255] Methods 1-3: The terminal detects and receives the DCI format according to the DCI format defined in the 5G system. If the CRC of the DCI format is scrambled according to the RNTI defined in 5G technology, the terminal determines the type of the current radio access network based on the indication information carried in the DCI.

[0256] This disclosure does not impose specific restrictions on the method for determining the indication information, the bit position in the DCI, or the bit length.

[0257] For example, the terminal determines the wireless access network type based on the reserved bits in the DCI.

[0258] For example, 1 bit indicates information, 0 represents 5G network, and 1 represents 6G network.

[0259] The 1-bit information refers to the reserved bits of the 5G terminal.

[0260] Method 2, wherein the search space is the search space indicated by the indication information carried in the SIB.

[0261] In this method, no limitation is made on the type of the SIB.

[0262] For example, it could be SIB1 or another OSI.

[0263] In this embodiment of the disclosure, no limitation is made on the type of search space.

[0264] For example, the search space can be Type0-PDCCH CSS, Type0A-PDCCH CSS, Type0B-PDCCH CSS, Type1-PDCCH CSS, and Type2-PDCCH CSS.

[0265] The terminal determines the current wireless access technology type in the search space using any of the following methods:

[0266] Method 2-1: The terminal detects and receives the DCI according to the 6G-specific DCI format. If the terminal detects and receives the corresponding 6G-specific DCI format, the terminal determines that the wireless access network type is a 6G network.

[0267] Method 2-2: The terminal detects and receives the DCI format according to the DCI format defined in the 5G system. If the CRC of the DCI format is scrambled according to the RNTI defined in 6G technology, the terminal determines that the wireless access network type is a 6G network.

[0268] This embodiment does not limit the value and determination method of the 6G specific RNTI value.

[0269] For example, the 6G specific RNTI value can be implemented in a predefined manner or determined by adding an offset to the cell ID.

[0270] Methods 2-3: The terminal detects and receives the DCI format according to the DCI format defined in the 5G system. If the CRC of the DCI format is scrambled according to the RNTI defined in 5G technology, the terminal determines the type of the current radio access network based on the indication information carried in the DCI.

[0271] This disclosure does not impose specific restrictions on the method for determining the indication information, the bit position in the DCI, or the bit length.

[0272] For example, the terminal determines the wireless access network type by refarming the reserved bits in the DCI.

[0273] For example, 1 bit indicates information, 0 represents 5G network, and 1 represents 6G network.

[0274] The 1-bit information is the reserved bits of the 5G terminal.

[0275] Method 3, wherein the search space is the search space configured by the base station through UE-dedicated signaling.

[0276] This disclosure makes no limitation on the UE-dedicated signaling, such as RRC signaling.

[0277] This disclosure does not limit the type of the search space, such as the search space being USS or group CSS, etc.

[0278] The terminal detects and receives DCI according to the search space configured by the UE-dedicated signaling. After it detects and receives the corresponding DCI in the search space, it determines that the radio access network is a 6G network.

[0279] This disclosure makes no restrictions on the DCI format definition, RNTI configuration, transmission resources, etc. transmitted within the search space.

[0280] In some embodiments, the terminal will subsequently perform operations such as sending, receiving, measuring, and reporting according to 6G wireless access network technology when any one of the following conditions is met:

[0281] The terminal simultaneously detects and receives 5G DCI and 6G DCI within the search space;

[0282] The terminal only detected 6G DCI within the search space.

[0283] In some embodiments, the SSB is an SSB defined in a 5G system and can be applied to cell search in 6G terminals.

[0284] In some embodiments, when the terminal cannot determine that the wireless access network is a 6G network according to the above method, it performs any of the following actions:

[0285] Action 1: Perform subsequent sending, receiving, measurement, and reporting operations according to the 5G access network;

[0286] Action 2: The terminal does not access the wireless access network.

[0287] Network equipment, such as the base station side:

[0288] A base station supporting 6G technology transmits SSB (Service Streaming Bus) within the frequency band shared with the 5G system, and indicates the terminal's wireless access network type by transmitting DCI (Distributed Communication Interface) in the subsequent search space. The base station then performs subsequent transmission, reception, measurement, and feedback operations based on the network type.

[0289] Method 1, wherein the search space is the search space indicated by the indication information carried in the MIB.

[0290] The search space is SS#0 indicated by the information carried in the MIB.

[0291] The base station indicates the current wireless access technology type in the search space according to any of the following methods.

[0292] Method 1-1: The base station sends the DCI according to the 6G-specific DCI format. If the terminal detects and receives the corresponding 6G-specific DCI format, the terminal determines that the wireless access network type is a 6G network.

[0293] In methods 1-2, the base station transmits the DCI according to the DCI format defined in the 5G system, and scrambles the CRC of the DCI format according to the RNTI defined in 6G technology. After the terminal detects and receives the corresponding DCI, the terminal determines that the wireless access network type is a 6G network.

[0294] This embodiment does not limit the value and determination method of the 6G specific RNTI value.

[0295] For example, the 6G specific RNTI value can be implemented in a predefined manner or determined by adding an offset to the cell ID.

[0296] Methods 1-3: The base station transmits the DCI format according to the DCI format defined in the 5G system. The CRC of the DCI format is scrambled according to the RNTI defined in 5G technology. The terminal determines the type of the current radio access network based on the indication information carried in the DCI.

[0297] This patent does not impose specific restrictions on the method for determining the indication information, the bit position in the DCI, or the bit length.

[0298] For example, the terminal determines the wireless access network type by refarming the reserved bits in the DCI.

[0299] For example, 1 bit indicates information, 0 represents 5G network, and 1 represents 6G network.

[0300] The 1-bit information is the reserved bits of the 5G terminal.

[0301] Method 2, wherein the search space is the search space indicated by the indication information carried in the SIB.

[0302] In this disclosure, no limitation is made on the type of the SIB.

[0303] For example, it could be SIB1 or another OSI.

[0304] In this method, no restrictions are placed on the type of search space.

[0305] For example, the search space can be Type0-PDCCH CSS, Type0A-PDCCH CSS, Type0B-PDCCH CSS, Type1-PDCCH CSS, and Type2-PDCCH CSS.

[0306] The base station indicates the current wireless access technology type in the search space according to any of the following methods.

[0307] Method 2-1: The base station sends the DCI according to the 6G-specific DCI format. If the terminal detects and receives the corresponding 6G-specific DCI format, the terminal determines that the wireless access network type is a 6G network.

[0308] Method 2-2: The base station sends the DCI according to the DCI format defined in the 5G system, and scrambles the CRC of the DCI format according to the RNTI defined in 6G technology. After the terminal detects and receives the corresponding DCI, the terminal determines that the radio access network type is a 6G network.

[0309] This embodiment does not limit the value and determination method of the 6G specific RNTI value.

[0310] For example, the 6G specific RNTI value can be implemented in a predefined manner or determined by adding an offset to the cell ID.

[0311] Methods 2-3: The base station transmits the DCI format according to the DCI format defined in the 5G system, and the CRC of the DCI format is scrambled according to the RNTI defined in 5G technology. The terminal determines the type of the current radio access network based on the indication information carried in the DCI.

[0312] This disclosure does not impose specific restrictions on the method for determining the indication information, the bit position in the DCI, or the bit length.

[0313] For example, the terminal determines the wireless access network type by refarming the reserved bits in the DCI.

[0314] For example, 1 bit indicates information, 0 represents 5G network, and 1 represents 6G network.

[0315] The 1-bit information is the reserved bits of the 5G terminal.

[0316] Method 3, wherein the search space is the search space configured by the base station through UE-dedicated signaling.

[0317] This disclosure makes no limitation on the UE-dedicated signaling, such as RRC signaling.

[0318] This disclosure does not limit the type of the search space, such as the search space being USS or group common CSS, etc.

[0319] The base station transmits a DCI within the search space configured in the UE-dedicated signaling. When the terminal detects and receives the corresponding DCI in the search space, it determines that the radio access network is a 6G network.

[0320] This method does not impose any restrictions on the DCI format definition, RNTI configuration, transmission resources, etc. transmitted within the search space.

[0321] When any of the following conditions are met, the terminal will subsequently perform operations such as sending, receiving, measuring, and reporting according to 6G wireless access network technology:

[0322] The terminal simultaneously detects and receives 5G DCI and 6G DCI within the search space;

[0323] The terminal only detected 6G DCI within the search space.

[0324] In some embodiments, the SSB is an SSB defined in a 5G system and can be applied to cell search in 6G terminals.

[0325] In some embodiments, when the terminal cannot determine that the wireless access network is a 6G network according to the above method, it performs any of the following actions:

[0326] Action 1: Perform subsequent sending, receiving, measurement, and reporting operations according to the 5G access network;

[0327] Action 2: The terminal does not access the wireless access network.

[0328] This disclosure also proposes an apparatus (also referred to as a communication device, etc.) for implementing any of the above methods. For example, an apparatus is proposed that includes units or modules for implementing the steps performed by the terminal in any of the above methods. Furthermore, another apparatus is proposed 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.

[0329] 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 functionality of some or all of the units or modules can be achieved through the design of these hardware circuits, which can be understood as one or more processors. For example, in one implementation, the hardware circuit is an application-specific integrated circuit (ASIC). The functionality of some or all of the units or modules is achieved through the design of the logical relationships between the components within the circuit. In another implementation, the hardware circuit can be implemented using 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 functionality of some or all of the units or modules. All units or modules of the above device can be implemented entirely through processor-called software, entirely through hardware circuits, or partially through processor-called software with the remaining parts implemented through hardware circuits.

[0330] 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. The logical relationships of the aforementioned hardware circuits are fixed or reconfigurable. For example, the processor is 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. Furthermore, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a Neural Network Processing Unit (NPU), a Tensor Processing Unit (TPU), or a Deep Learning Processing Unit (DPU).

[0331] Figure 4A is a schematic diagram of the structure of a terminal according to an embodiment of this disclosure. The terminal 4100 is used to execute any of the above methods. In some embodiments, as shown in Figure 4A, the terminal 4100 may include at least one of a transceiver module 4101 and a processing module 4102.

[0332] In some embodiments, the transceiver module 4101 is configured to receive a synchronization signal block (SSB) sent by a network device, wherein the SSB is used for access of a first radio access technology (RAT) type and / or a second RAT type; and to receive downlink control information (DCI) sent by the network device.

[0333] In some embodiments, the processing module 4102 is used to determine the RAT type of the terminal accessing the network device based on the first information associated with the DCI.

[0334] Optionally, the transceiver module 4101 is used to perform at least one of the communication steps (such as step S2101, step S2102, but not limited thereto) performed by the terminal 4100 in any of the above methods, which will not be described in detail here.

[0335] Optionally, the processing module 4102 is used to execute at least one of the other steps (such as step S2103, step S2104, but not limited thereto) executed by the terminal 4100 in any of the above methods, which will not be described in detail here.

[0336] Figure 4B is a schematic diagram of the structure of a network device according to an embodiment of this disclosure. The network device 4200 is used to perform any of the above methods. In some embodiments, as shown in Figure 4B, the network device 4200 may include a transceiver module 4201.

[0337] In some embodiments, the transceiver module 4201 is configured to send a synchronization signal block (SSB) to the terminal, the SSB being used for access of a first radio access technology (RAT) type and / or a second RAT type; and to send downlink control information (DCI) to the terminal, the first information associated with the DCI being used by the terminal to determine the RAT type for accessing the network device.

[0338] Optionally, the transceiver module 4201 is used to perform at least one of the communication steps (such as step S2101, step S2102, but not limited thereto) performed by the network device 4200 in any of the above methods, which will not be described in detail here.

[0339] In some embodiments, the transceiver module may include a transmitting module and / or a receiving module, which may be separate or integrated. Optionally, the transceiver module may be interchangeable with a transceiver.

[0340] In some embodiments, the processing module may be a single module or may include multiple sub-modules. Optionally, the multiple sub-modules may each perform all or part of the steps required by the processing module. Optionally, the processing module may be interchangeable with a processor, and the transceiver module may be interchangeable with a transceiver.

[0341] Figure 5A is a schematic diagram of the structure of the communication device 5100 proposed in an embodiment of this disclosure. The communication device 5100 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 5100 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.

[0342] As shown in Figure 5A, the communication device 5100 is used to execute any of the above methods. In some embodiments, the communication device 5100 includes one or more processors 5101. The processor 5101 may be a general-purpose processor or a special-purpose processor, such as a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processing unit may 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. Optionally, the communication device 5100 is used to execute any of the above methods. Optionally, one or more processors 5101 are used to invoke instructions to cause the communication device 5100 to execute any of the above methods.

[0343] In some embodiments, the communication device 5100 further includes one or more transceivers 5102. When the communication device 5100 includes one or more transceivers 5102, the transceiver 5102 performs at least one of the communication steps (e.g., steps S2101, S2102, but not limited thereto) in the above method, such as sending and / or receiving, and the processor 5101 performs at least one of other steps (e.g., steps S2103, S2104, but not limited thereto). In optional embodiments, the transceiver may include a receiver and / or a transmitter, which may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, interface, etc., can be used interchangeably; the terms transmitter, sending unit, transmitter, sending circuit, etc., can be used interchangeably; the terms receiver, receiving unit, receiver, receiving circuit, etc., can be used interchangeably.

[0344] In some embodiments, the communication device 5100 further includes one or more memories 5103 for storing data and / or instructions. Optionally, one or more processors 5101 are used to invoke instructions stored in the memory 5103 to cause the communication device 5100 to perform any of the above methods. Optionally, all or part of the memory 5103 may also be located outside the communication device 5100. In an optional embodiment, the communication device 5100 may include one or more interface circuits 5104. Optionally, the interface circuit 5104 is connected to the memory 5103 and can be used to receive data and / or instructions from the memory 5103 or other devices, and can be used to send data and / or instructions to the memory 5103 or other devices. For example, the interface circuit 5104 can read data and / or instructions stored in the memory 5103 and send the data and / or instructions to the processor 5101.

[0345] The communication device 5100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 5100 described in this disclosure is not limited thereto, and the structure of the communication device 5100 may not be limited by FIG. 5A. The communication device may be a standalone device or may be part of a larger device. For example, the communication device may be: (1) a standalone 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, programs and / or instructions; (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.

[0346] Figure 5B is a schematic diagram of the structure of chip 5200 according to an embodiment of this disclosure. For cases where the communication device 5100 can be a chip or a chip system, please refer to the schematic diagram of chip 5200 shown in Figure 5B, but it is not limited thereto.

[0347] Chip 5200 includes one or more processors 5201. Chip 5200 is used to perform any of the methods described above.

[0348] In some embodiments, chip 5200 further includes one or more interface circuits 5202. Optionally, terms such as interface circuit, interface, and transceiver pin can be used interchangeably. In some embodiments, chip 5200 further includes one or more memories 5203 for storing data and / or instructions. Optionally, all or part of the memories 5203 may be located outside of chip 5200. Optionally, the interface circuit 5202 is connected to the memories 5203, and the interface circuit 5202 can be used to receive data and / or instructions from the memories 5203 or other devices, and the interface circuit 5202 can be used to send data and / or instructions to the memories 5203 or other devices. For example, the interface circuit 5202 can read data and / or instructions stored in the memories 5203 and send the data and / or instructions to the processor 5201.

[0349] In some embodiments, the interface circuit 5202 performs at least one of the communication steps such as sending and / or receiving in the above-described method (e.g., steps S2101, S2102, but not limited thereto). The interface circuit 5202 performing the communication steps such as sending and / or receiving in the above-described method refers, for example, to the interface circuit 5202 performing data and / or instruction interaction between the processor 5201, the chip 5200, the memory 5203, or the transceiver device. In some embodiments, the processor 5201 performs at least one of other steps (e.g., steps S2103, S2104, but not limited thereto).

[0350] The modules and / or devices described in the various embodiments, such as virtual devices, physical devices, and chips, can be combined or separated arbitrarily as needed. Optionally, some or all steps can also be performed collaboratively by multiple modules and / or devices, which is not limited here.

[0351] This disclosure also proposes a storage medium storing instructions that, when executed on a communication device, cause the communication device to perform any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but not limited thereto; it may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but not limited thereto; it may also be a temporary storage medium.

[0352] This disclosure also proposes a program product, including a program and / or instructions, which, when executed by a communication device, cause the communication device to perform any of the above methods. Optionally, the program product is a computer program product. Optionally, the program product is stored on the storage medium.

[0353] This disclosure also proposes a computer program that, when run on a computer, causes the computer to perform any of the above methods.

[0354] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

A communication method, characterized in that, The method is executed by a terminal, and the method includes: Receive synchronization signal block (SSB) sent by the network device, wherein the SSB is used for access of the first radio access technology (RAT) type and / or the second RAT type; Receive downlink control information (DCI) sent by the network device; Based on the first information associated with the DCI, the RAT type of the terminal accessing the network device is determined. The method according to claim 1, characterized in that, The first piece of information associated with the DCI includes any one of the following: DCI format; The first wireless network temporary identifier (RNTI) is used to scramble the DCI format cyclic redundancy check (CRC) code. The indication information carried in the DCI is used to indicate the RAT type. The method according to claim 2, characterized in that, The determination of the RAT type for terminal access to the network device based on the first information associated with the DCI includes any one of the following: If the DCI is detected and received according to the first DCI format, the RAT type of the terminal accessing the network device is determined to be the first RAT type. If the DCI is detected and received according to the second DCI format, the RAT type of the terminal accessing the network device is determined to be the second RAT type. If the DCI is detected and received according to the second DCI format, and the value of the first RNTI is the first value, then the RAT type of the terminal accessing the network device is determined to be the first RAT type. If the DCI is detected and received according to the second DCI format, and the value of the first RNTI is the second value, then the RAT type of the terminal accessing the network device is determined to be the second RAT type. If the DCI is detected and received according to the second DCI format, the value of the first RNTI is the second value, and the RAT type indicated by the indication information is the first RAT type, then it is determined that the RAT type of the terminal accessing the network device is the first RAT type. If the DCI is detected and received according to the second DCI format, the value of the first RNTI is the second value, and the RAT type indicated by the indication information is the second RAT type, then it is determined that the RAT type of the terminal accessing the network device is the second RAT type. Wherein, the first DCI format is the DCI format under the first RAT type, and the second DCI format is the DCI format under the second RAT type. The method according to claim 3, characterized in that, The method further includes at least one of the following: The first value is determined based on a predefined method; The first value is determined based on the cell identifier and offset. The method according to claim 3 or 4, characterized in that, The indication information occupies reserved bits in the DCI. The method according to claim 5, characterized in that, When the value of the reserved bit is a third value, the RAT type indicated by the indication information is the first RAT type. The method according to any one of claims 1-6, characterized in that, The method further includes: If the received DCI meets the first condition, the RAT type of the terminal accessing the network device is determined to be the first RAT type. The method according to claim 7, characterized in that, The first condition includes at least one of the following: Detect and receive DCIs corresponding to the first RAT type and the second RAT type respectively within the same search space; Detect and receive the DCI corresponding to the first RAT type within a search space. The method according to any one of claims 1-8, characterized in that, The method further includes: If the RAT type of the terminal accessing the network device cannot be determined based on the first information, the RAT type of the terminal accessing the network device is determined to be the second RAT type. The method according to any one of claims 1-9, characterized in that, The receiving of downlink control information (DCI) sent by the network device includes: Within a first search space, the DCI sent by the network device is received, wherein the first search space includes any one of the following: The search space indicated by the main information block (MIB); The search space indicated by the system message; The search space indicated by terminal-specific signaling. The method according to any one of claims 1-10, characterized in that, The method further includes: Based on the determined RAT type, the network device is accessed, and a first operation is performed, the first operation including at least one of the following: Message sending operation; Information receiving operation; Measurement operation; Measurement result reporting operation. A communication method, characterized in that, The method is performed by a network device, and the method includes: Send a synchronization signal block (SSB) to the terminal, wherein the SSB is used for access of the first radio access technology RAT type and / or the second RAT type; Downlink control information (DCI) is sent to the terminal, and the first information associated with the DCI is used by the terminal to determine the RAT type for accessing the network device. The method according to claim 12, characterized in that, The first information includes any one of the following: DCI format; The first wireless network temporary identifier (RNTI) is used to scramble the DCI format cyclic redundancy check (CRC) code. The indication information carried in the DCI is used to indicate the RAT type. The method according to claim 13, characterized in that, The method further includes at least one of the following: The first value is determined based on a predefined method; The first value is determined based on the cell identifier and offset; Wherein, the first value is the value of the first RNTI when the RAT type of the terminal accessing the network device is the first RAT type. The method according to claim 13 or 14 is characterized in that, The indication information occupies reserved bits in the DCI. The method according to claim 15, characterized in that, When the RAT type of the terminal accessing the network device is the first RAT type, the bit value of the reserved bit is the third value. The method according to any one of claims 12-16, characterized in that, Sending downlink control information (DCI) to the terminal includes any one of the following: Within the same search space, send DCIs corresponding to the first RAT type and the second RAT type to the terminal respectively; Within a search space, a DCI corresponding to the first RAT type is sent to the terminal. The method according to any one of claims 12-17, characterized in that, Sending downlink control information (DCI) to the terminal includes: Within a first search space, the DCI is sent to the terminal, wherein the first search space includes any one of the following: The search space indicated by the main information block (MIB); The search space indicated by the system message; The search space indicated by terminal-specific signaling. A terminal, characterized in that, include: The transceiver module is configured to receive a synchronization signal block (SSB) sent by a network device, the SSB being used for access of a first radio access technology (RAT) type and / or a second RAT type. The transceiver module is also configured to receive downlink control information (DCI) sent by the network device; The processing module is configured to determine the RAT type of the terminal accessing the network device based on the first information associated with the DCI. A network device, characterized in that, include: The transceiver module is configured to send a synchronization signal block (SSB) to the terminal, the SSB being used for access of a first radio access technology (RAT) type and / or a second RAT type. The transceiver module is also configured to send downlink control information (DCI) to the terminal, wherein the first information associated with the DCI is used by the terminal to determine the RAT type for accessing the network device. A terminal, characterized in that, include: One or more processors; The processor is used to execute the method according to any one of claims 1-11. A network device, characterized in that, include: One or more processors; The processor is used to execute the communication method according to any one of claims 12-18. A communication system, characterized in that, include: A terminal configured to implement the communication method according to any one of claims 1-11; A network device configured to implement the communication method according to any one of claims 12-18. A storage medium storing instructions, characterized in that, When the instruction is executed on the communication device, it causes the communication device to perform the communication method as described in any one of claims 1-11 or 12-18. A computer program product, comprising a computer program, characterized in that, When executed by a processor, the computer program is used to implement the communication method according to any one of claims 1-11 or 12-18.

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