Communication method and apparatus, and device and storage medium

Abstract

A communication method and apparatus, and a device and a storage medium, which belong to the technical field of mobile communications. The method is executed by a terminal device, and comprises: accessing a first sub-system in a communication system (301), wherein the communication system includes a main system and two or more sub-systems; a first sub-system is one of the two or more sub-systems; the two or more sub-systems respectively correspond to different services and / or capabilities; the main system is used for providing a shared capability and / or resource for the two or more sub-systems; and the two or more sub-systems have different synchronization configurations and / or access configurations. Provided in the solution is an access scheme in the case where a network system is divided into a plurality of sub-systems.

Description

Communication method, device, equipment and storage medium Technical Field

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

[0002] In the 5G NR system, the terminal device first needs to access the network equipment to synchronize with the network side and establish a wireless link with the network side.

[0003] In related technologies, a number of network devices (such as base stations) for access can be set up in a wireless communication system. When a terminal device is turned on and has not yet accessed the network, it can perform cell measurement, synchronization, and establish a wireless link to complete random access.

[0004] Summary of the Invention

[0005] The embodiments of the present application provide a communication method, apparatus, device, and storage medium. The technical solution is as follows:

[0006] In one aspect, an embodiment of the present application provides a communication method, which is performed by a terminal device and includes:

[0007] A first subsystem in a communication system is accessed; the communication system includes a main system and two or more subsystems; the first subsystem is one of the two or more subsystems; the two or more subsystems respectively correspond to different services and / or capabilities, and the main system is used to provide shared capabilities and / or resources for the two or more subsystems;

[0008] The two or more subsystems have different synchronization configurations and / or access configurations.

[0009] In one aspect, an embodiment of the present application provides a communication method, which is performed by a network device and includes:

[0010] A first subsystem in a communication system receiving access from a terminal device; the communication system comprises a main system and two or more subsystems; the first subsystem is one of the two or more subsystems; the two or more subsystems respectively correspond to different services and / or capabilities, and the main system is used to provide shared capabilities and / or resources for the two or more subsystems;

[0011] The two or more subsystems have different synchronization configurations and / or access configurations.

[0012] On the other hand, an embodiment of the present application provides a communication device, the device comprising:

[0013] an access module, configured to access a first subsystem in a communication system; the communication system comprises a main system and two or more subsystems; the first subsystem is one of the two or more subsystems; the two or more subsystems respectively correspond to different services and / or capabilities, and the main system is configured to provide shared capabilities and / or resources for the two or more subsystems;

[0014] The two or more subsystems have different synchronization configurations and / or access configurations.

[0015] On the other hand, an embodiment of the present application provides a communication device, the device comprising:

[0016] an access module, configured to accept access from a terminal device to a first subsystem in a communication system; the communication system comprises a main system and two or more subsystems; the first subsystem is one of the two or more subsystems; the two or more subsystems respectively correspond to different services and / or capabilities, and the main system is configured to provide shared capabilities and / or resources for the two or more subsystems;

[0017] The two or more subsystems have different synchronization configurations and / or access configurations.

[0018] On the other hand, an embodiment of the present application provides a terminal device, the terminal device including a processor, a memory, and a transceiver;

[0019] The memory stores a computer program, and the processor executes the computer program to enable the terminal device to implement the above-mentioned communication method.

[0020] On the other hand, an embodiment of the present application provides a network device, the network device including a processor, a memory, and a transceiver;

[0021] The memory stores a computer program, and the processor executes the computer program to enable the network device to implement the above communication method.

[0022] On the other hand, an embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored. The computer program is loaded and executed by a processor to implement the above-mentioned communication method.

[0023] On the other hand, the present application also provides a chip, which is used to run in a communication device so that the communication device executes the above-mentioned communication method.

[0024] In another aspect, the present application provides a computer program product, the computer program product including computer instructions stored in a computer-readable storage medium. A processor of a communication device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the communication device to perform the above-mentioned communication method.

[0025] On the other hand, the present application provides a computer program, which is executed by a processor of a communication device to implement the above communication method.

[0026] An embodiment of the present application provides a communication solution for wireless access, wherein the network system includes a main system and two or more subsystems, and the two or more subsystems have different synchronization configurations and / or access configurations. The terminal device can choose to access the first subsystem, thereby providing an access solution when the network system is divided into multiple subsystems. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present application;

[0028] FIG2 is a framework diagram of a minimalist multi-energy system involved in this application;

[0029] FIG3 is a flow chart of a communication method provided by an embodiment of the present application;

[0030] FIG4 is a flow chart of a communication method provided by one embodiment of the present application;

[0031] FIG5 is a schematic diagram of a measurement involved in this application;

[0032] FIG6 is a flow chart of a communication method provided by an embodiment of the present application;

[0033] FIG7 is a block diagram of a communication device provided by one embodiment of the present application;

[0034] FIG8 is a block diagram of a communication device provided by one embodiment of the present application;

[0035] FIG9 is a schematic structural diagram of a communication device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0036] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application are further described in detail below with reference to the accompanying drawings.

[0037] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. A person skilled in the art will appreciate that, with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0038] 1 shows a schematic diagram of a communication system according to an exemplary embodiment of the present application, which includes a network device 110 and a terminal device 120, and / or a terminal device 120 and a terminal device 130, which are not limited in the present application.

[0039] The network device 110 in the present application provides wireless communication functions, and the network device 110 includes but is not limited to: Evolved Node B (eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (e.g., Home Evolved Node B, or Home Node B, HNB), Baseband Unit (BBU), Access Point (AP) in Wireless Fidelity (Wi-Fi) system, Wireless Relay Node, Wireless Backhaul Node, Transmission Point (TP) or Transmission and Reception Point (TRP), etc., and can also be the Next Generation Node B (NGNB) in the 5th Generation (5G) mobile communication system. The term "gNB" refers to a base station (B, gNB) or a transmission point (TRP or TP), or one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or a network node constituting a gNB or a transmission point, such as a baseband unit (BBU) or a distributed unit (DU), or a base station in a Beyond Fifth Generation (B5G) or a 6th Generation (6G) mobile communication system, or a core network (CN), fronthaul, backhaul, radio access network (RAN), network slicing, or a serving cell, primary cell (PCell), primary secondary cell (PSCell), special cell (SpCell), secondary cell (SCell), or neighboring cell of a terminal device.

[0040] The terminal device 120 and / or terminal device 130 in this application are also called user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, and user device. The terminals include, but are not limited to, handheld devices, wearable devices, vehicle-mounted devices, and Internet of Things devices, such as mobile phones, tablet computers, e-book readers, laptop computers, desktop computers, televisions, game consoles, mobile Internet devices (MIDs), augmented reality (AR) terminals, virtual reality (VR) terminals, and mixed reality (MR) terminals, wearable devices, handles, electronic tags, controllers, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical care, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, wireless terminals in remote medical surgery, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loops (WLANs), and wireless terminals in industrial control. Loop (WLL) stations, personal digital assistants (PDA), TV set-top boxes (STB), customer premises equipment (CPE), etc.

[0041] The network device 110 and the terminal device 120 communicate with each other via some air interface technology, such as a Uu interface.

[0042] Exemplarily, there are two communication scenarios between the network device 110 and the terminal device 120: an uplink communication scenario and a downlink communication scenario. Uplink communication refers to sending signals to the network device 110; downlink communication refers to sending signals to the terminal device 120.

[0043] The terminal device 120 and the terminal device 130 communicate with each other via some air interface technology, such as a PC5 interface.

[0044] In some embodiments, there are two communication scenarios between the terminal device 120 and the terminal device 130: a first sideline communication scenario and a second sideline communication scenario. The first sideline communication refers to sending signals to the terminal device 130; the second sideline communication refers to sending signals to the terminal device 120.

[0045] Terminal device 120 and terminal device 130 are both within the network coverage and located in the same cell, or terminal device 120 and terminal device 130 are both within the network coverage but located in different cells, or terminal device 120 is within the network coverage but terminal device 130 is outside the network coverage.

[0046] The technical solutions provided in the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Advanced Long Term Evolution (LTE-A) system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, 5G mobile communication system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-U) system, NR on unlicensed spectrum (NR-based access to unlicensed spectrum) system. Unlicensed spectrum, NR-U) system, terrestrial communication network (Terrestrial Networks, TN) system, non-terrestrial communication network (Non-Terrestrial Networks, NTN) system, wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (Wireless Fidelity, Wi-Fi), cellular Internet of Things system, cellular passive Internet of Things system, can also be applied to the subsequent evolution system of the 5G NR system, and can also be applied to B5G, 6G and subsequent evolution systems. In some embodiments of the present application, "NR" may also be referred to as a 5G NR system or a 5G system. Among them, the 5G mobile communication system may include non-standalone networking (NSA) and / or standalone networking (SA).

[0047] The technical solutions provided in the embodiments of the present application can also be applied to machine type communication (MTC), long term evolution technology for machine-to-machine communication (LTE-M), device-to-device (D2D) network, machine-to-machine (M2M) network, Internet of Things (IoT) network or other networks. Among them, the IoT network can include, for example, the Internet of Vehicles. Among them, the communication mode in the Internet of Vehicles system is collectively referred to as vehicle to other devices (Vehicle to X, V2X, X can represent anything), for example, the V2X can include: vehicle to vehicle (V2V) communication, vehicle to infrastructure (V2I) communication, vehicle to pedestrian communication (V2P) or vehicle to network (V2N) communication, etc.

[0048] 1) 5G

[0049] 5G technology adopts the New Radio (NR) design, based on LTE's OFDM+MIMO underlying air interface technology framework. Compared with LTE, it has made a number of technical enhancements and improvements in system solution design, including support for higher frequency band ranges and larger carrier bandwidths, flexible frame structures, diversified parameter sets, optimized reference signal design, new coding, symbol-level resource scheduling, MIMO enhancement, latency reduction, coverage enhancement, mobility enhancement, terminal energy saving, signaling design optimization, a new network architecture, enhanced service QoS (Quality of Service) guarantees, network slicing, vehicle to everything (V2X), industrial Internet of Things (IIoT), unlicensed spectrum design (New Radio-unlicensed, NR-U), and good support for multiple vertical industries.

[0050] Mobile Internet and Mobile Internet of Things (IoT) are the two main drivers of 5G development and offer broad prospects for the future of mobile communications. 5G defines three major application scenarios: enhanced mobile broadband (eMBB), ultra-reliable low-latency communications (URLLC), and massive machine-type communications (mMTC). eMBB is primarily targeted at the mobile Internet, while URLLC and mMTC are targeted at the mobile IoT. The mobile Internet will build a comprehensive, user-centric information ecosystem. In recent years, user-centric needs such as ultra-high-definition video, virtual reality (VR), augmented reality (AR), distance education, remote work, telemedicine, and wireless home entertainment have become increasingly prevalent. These burgeoning new service demands inevitably place higher demands on mobile communications transmission bandwidth and data rates. At the same time, vertical industries such as the Mobile Internet of Things, Industrial Internet, Internet of Vehicles, smart grids, and smart cities are rapidly transforming towards informatization and digitalization. Beyond smartphones, mobile terminals are becoming increasingly diverse, including wearable devices, cameras, drones, robots, vehicle-mounted and ship-mounted terminal modules, and customized industry terminals.

[0051] 2) Terminal energy-saving technology

[0052] The 5G NR standard guarantees extremely high network system data rates to meet the ITU's IMT-2020 minimum 5G data throughput performance requirements. At the same time, terminal-side energy consumption is also a key performance requirement of IMT-2020. Starting with Release 16, the NR standard has dedicated a project to optimize terminal energy conservation. The Release 16 standard introduced energy-saving signals to further save energy for UEs in the RRC_CONNECTED state. This energy-saving signal is used in conjunction with the DRX mechanism, with the terminal receiving an indication of an energy-saving wake-up signal before the DRX ON duration. The Release 17 standard optimizes energy conservation for UEs in the idle state receiving paging messages by introducing similar energy-saving signals. One energy-saving signal, called PEI (paging early indication), indicates whether the UE will receive a paging PDCCH at the target PO before the target PO arrives. The Release 17 standard also introduces an enhanced solution for search space set group switching, including a PDCCH skipping solution that saves power when necessary by skipping PDCCH detection.

[0053] 3) Reduce the capacity of the terminal

[0054] R15 / R16 terminals are designed to support extremely high peak rates. Therefore, they require high terminal capabilities, which are mainly composed of the following aspects:

[0055] The LTE standard defines a maximum single-carrier bandwidth of 20MHz, with larger bandwidths achieved through multi-carrier aggregation. 5G NR ultimately defines a maximum carrier bandwidth of 100MHz for sub-6GHz bands, five times that of LTE. The maximum carrier bandwidth for millimeter-wave bands is 400MHz.

[0056] Due to its support for flexible time-domain scheduling and frame structure, terminals have relatively high processing speeds. Larger subcarrier spacing results in shorter time slots. All of this requires NR terminals to have exponentially higher processing speeds than LTE terminals.

[0057] The MIMO antenna size required by NR has also increased. The reference configuration for LTE terminals is one transmit and two receive antennas, while NR Release 15 requires dual transmit and four receive antennas for frequencies above 2500 MHz.

[0058] NR R15 / R16 also does not support half-duplex, and all terminals are required to operate in full-duplex at FDD frequencies.

[0059] These fundamental NR terminal capabilities place high demands on the radio frequency, baseband, and other modules, significantly exceeding those of LTE. However, some NR application scenarios, such as the Internet of Things, industrial automation, and wearable devices, do not require such high processing capacity and speed. These scenarios, in turn, demand low-volume and power-efficient communication hardware. Lightweight capabilities are a hallmark of these terminals. With this in mind, NR Release 17 is researching and introducing a reduced-capability terminal standard with reduced capabilities.

[0060] The reduced-capability terminal standard reduces some mandatory capabilities of NR Release 15 / 16. It defines corresponding terminal feature sets for these capabilities. The reduced-capability terminal standard also further optimizes terminal identification, access procedures, and power consumption measurement to suit relevant application scenarios. Furthermore, the standard for compact terminals explicitly requires that these terminals not support complex feature sets, such as high reliability and low latency (HRLS) and carrier aggregation.

[0061] In the R17 and R18 standards, the capabilities of reduced-capability terminals are defined in terms of supported bandwidth, number of antennas, half-duplex capability, measurement capability, processing time relaxation, and peak rate.

[0062] 4) Synchronization signal block in NR

[0063] The synchronization signal block defined in 5G is used by the terminal to search for cells. The synchronization signal block contains the synchronization signal and PBCH. The information carried by the PBCH channel includes MIB information from the upper layer and additional 8 bits of information related to layer 1. The information related to layer 1 includes SFN, half-frame indication, SSB index, etc. The specific definitions are as follows:

[0064] The bits carried by PBCH include MIB from higher layers, totaling A bits. and 8 bits from layer 1, The A-bit MIB includes 6 bits of SFN, 1 bit of subcarrier spacing information, 4 bits of SSB subcarrier offset, DMRS related information, resource information of PDCCH scheduling SIB, etc., and also includes 1 idle bit.

[0065] 8 bits of layer 1, middle, The lowest 4 digits of SFN; For half frame indication; when L SSB =64, The highest 3 bits of the SSB index, otherwise, is the parameter k SSB The highest bit, is a reserved bit. SSB is the maximum number of SSBs, k SSB It is the subcarrier offset information of SSB. When the system frequency band is less than 6GHz, that is, L SSB When the bit is less than 64, 2 bits of layer 1 related information are reserved.

[0066] In the above MIB information, cellBarred is used to indicate the access control state of the cell. It is used together with cellReservedForOperatorUse and cellReservedForOtherUse in SIB1 to determine the access control state of the cell.

[0067] cellBarred="not barred", cellReservedForOperatorUse="not reserved", and cellReservedForOtherUse="not true"; wherein, if cell status="not barred", the UE may use the cell as a candidate cell for cell selection or reselection.

[0068] cellBarred="barred", or cellReservedForOtherUse="true"; cell status="barred".

[0069] cellBarred = "not barred", cellReservedForOperatorUse = "reserved", and cellReservedForOtherUse = not "true". UEs assigned Access Identity 11 or 15 can use this cell as a candidate cell for cell selection or reselection. UEs assigned Access Identity 1, 2 and 12 to 14 consider this cell to be in the "barred" state.

[0070] Whether it is terminal energy-saving technology or reduced-capacity terminals, they are all tailoring of the functions of NR terminals defined in R15, at the expense of terminal performance and network performance in exchange for terminal energy saving or low cost. This is because the initial design goal of NR is large bandwidth and high speed. Neither the network nor the terminal has been optimized for small data volume services such as IoT services, nor has it considered how to save energy on the terminal. In the process of optimizing for these goals in the later stage of the standard, the complexity of the system design has increased and the performance has decreased. In order to solve these problems, for the future 6G system design, this application proposes a minimalist and multi-functional system, which consists of a minimized minimalist core and multiple subsystems with different capability directions and application scenarios. Under this system architecture, how the terminal accesses the minimalist core and each subsystem is a problem that needs to be solved.

[0071] Please refer to Figure 2, which shows a framework diagram of a minimalist multi-functional system involved in this application; as shown in Figure 2, the communication system may include a minimalist core and several subsystems, and the subsystems can be activated simultaneously and can also switch between each other.

[0072] In a 6G-oriented simplified multi-functional system, there are issues related to how the network deploys the simplified multi-functional system and how the terminal accesses the simplified multi-functional system. The subsequent embodiments of this application propose a method for accessing the simplified multi-functional system.

[0073] Please refer to FIG3 , which shows a flow chart of a communication method provided by an embodiment of the present application. The method can be interactively executed by a terminal device and a network device, wherein the terminal device can be the terminal device 120 or the terminal device 130 in the network architecture shown in FIG1 , and the network device can be the network device 110 in the network architecture shown in FIG1 . The method can include the following steps:

[0074] In step 301, a terminal device accesses a first subsystem in a communication system; accordingly, a network device accepts the access of the terminal device to the first subsystem in the communication system; the communication system includes a main system and two or more subsystems; the first subsystem is one of the two or more subsystems; the two or more subsystems respectively correspond to different services and / or functions, and the main system is used to provide shared functions and / or resources for the two or more subsystems; the two or more subsystems have different synchronization configurations and / or access configurations.

[0075] Among them, the above-mentioned main system can be the 6G minimalist core in Figure 2, and the above-mentioned two or more subsystems can include but are not limited to two or more of the broadband cellular subsystem, positioning perception subsystem, URLLC subsystem and large-scale IoT subsystem in Figure 2.

[0076] The main system is a key part of the above-mentioned communication system to realize a minimalist multi-functional system. Each subsystem in the communication system needs to use the common functions and / or resources provided by the main system to a greater or lesser extent. In order to effectively reduce the complexity and cost of each subsystem, the main system can only include the minimum common capabilities. For example, the main system can include the following three functions / capabilities: endogenous intelligent management, security management, and flexible spectrum management.

[0077] In the embodiments of the present application, the primary system can be a minimal system that provides basic services to terminal devices, such as access, basic data transmission, and mobility management. It can provide a reliable basic connection for the terminal, achieve wide network coverage, and ensure service reliability. It provides a system with common capabilities for terminals with different service requirements and capabilities, such as access, cell handover, inter-system handover, and resource management.

[0078] Building upon the minimalist common technology core corresponding to the aforementioned main systems, the communications system also includes several limitedly integrated subsystems, allowing for appropriate decoupling and individual optimization in various communication scenarios. This allows for a "minimalist, multi-functional" communications system with on-demand capacity allocation and flexible functional combinations. For example, the communications system can be specifically optimized for four different capability areas: cloud connectivity, critical IoT, ubiquitous IoT, and sensing. Within each capability area, the communications system includes one or more subsystems, allowing for independent selection of key technologies and hardware system design based on application scenarios, spectrum, interface types, and other factors.

[0079] For example, in the four different capability directions mentioned above, the communication system can include subsystems such as broadband cellular, D2D, URLLC, positioning and perception, large-scale Internet of Things, and aerospace communications. Among them, the broadband cellular subsystem focuses on communication capabilities, pursuing significant improvements in peak rate, spectrum efficiency, coverage, and reliability; the D2D subsystem focuses on high connection density, mobility, and positioning accuracy. The URLLC subsystem focuses on highly reliable and low-latency data transmission. The positioning and perception subsystem implements perception capabilities, captures environmental details of the physical world, and supports twin reconstruction of the virtual world. The large-scale Internet of Things subsystem supports low or even extremely low power consumption, supports a larger number of connections, and supports diverse coverage requirements. Subsystems such as aerospace communications focus on achieving full network coverage.

[0080] Subsystems can share some hardware resources, such as antennas and processing power. They can choose whether to maintain air interface compatibility and determine the extent to which they share air interface technology and hardware design with the broadband cellular subsystem. Optionally, a black-box, specialized AI algorithm library can replace common and complex traditional software algorithms, achieving relative independence and independent optimization for each subsystem and significantly simplifying communication protocols. By switching and combining multiple AI algorithms, multiple subsystems can be switched and combined.

[0081] Specifically, in the aforementioned communication system, depending on the differences in the protocols or technologies required by the main system and the multiple subsystems to implement their respective functions, the main system and two or more systems in the multiple subsystems may share a common hardware design or may have different hardware designs. For example, in the aforementioned communication system, the access layer equipment may include multiple types of base stations / access points, with at least some protocol / technology differences between the different base stations / access points. For example, each of the multiple types of base stations / access points may correspond to one or more cells, and the one or more cells may correspond to the same system in the main system and the at least two subsystems, or the one or more cells may correspond to two or more systems in the main system and the at least two subsystems.

[0082] From the terminal device side, the terminal device can work on the corresponding main system or subsystem according to the protocols / capabilities it supports and the current business of the terminal device; for example, the terminal device is a user's mobile phone, which supports broadband cellular communication, D2D communication and aerospace communication capabilities. When the terminal device is currently performing a voice call service, it can work in the broadband cellular communication subsystem or the aerospace communication subsystem. When the terminal device is performing a D2D service, it can work in the D2D communication subsystem. For another example, the terminal device is an Internet of Things device, which supports positioning and perception capabilities and large-scale Internet of Things communication capabilities. When performing positioning / perception services, the terminal device can work in the positioning and perception subsystem. When performing Internet of Things communication services (such as sensor data reporting), it can work in the large-scale Internet of Things communication subsystem.

[0083] In the embodiment of the present application, since the main system and each subsystem may not share the same hardware design / communication protocol / air interface design, in order for the terminal to work on a certain subsystem, it needs to first access the subsystem.

[0084] In an embodiment of the present application, the process of the above-mentioned terminal device accessing the first subsystem refers to the process of the terminal device establishing a wireless link with the first subsystem; or in other words, the process of the above-mentioned terminal device accessing the first subsystem refers to the process of the terminal device establishing a wireless link with the cell corresponding to the first subsystem.

[0085] The above-mentioned network device accepts the terminal device to access the first subsystem in the communication system, which may mean that the network device establishes a wireless link with the terminal device through the first subsystem; or, in other words, a wireless link based on the first subsystem is established between the network device and the terminal device, for example, a wireless link based on the cell corresponding to the first subsystem is established between the network device and the terminal device.

[0086] Different subsystems may have different synchronization configurations and / or access configurations, so that the terminal device can access the corresponding subsystem through the corresponding synchronization configuration and / or access configuration when accessing.

[0087] Optionally, the above synchronization configuration may include configuration related to the transmission and reception of synchronization signals, which is used to indicate the transmission and reception method of the synchronization signals of the corresponding subsystem.

[0088] Optionally, the access configuration may include random access-related configuration, which is used to indicate a random access method of the corresponding subsystem.

[0089] The above-mentioned access configuration may optionally also include configuration of access methods other than random access. For example, for subsystems related to non-mobile scenarios, the above-mentioned access configuration may instruct the terminal device to skip the random access process and establish a connection with the above-mentioned subsystem according to pre-configured connection parameters.

[0090] To sum up, in the solution shown in the embodiment of the present application, the network system includes two or more subsystems, and the two or more subsystems have different synchronization configurations and / or access configurations. The terminal device can choose to access the first subsystem therein, thereby providing an access solution when the network system is divided into multiple subsystems.

[0091] Based on the solution shown in Figure 3, the terminal device can independently access the first subsystem. For example, the terminal device can directly access the first subsystem according to the synchronization configuration and / or access configuration of the first subsystem during initial access.

[0092] Please refer to FIG4 , which shows a flow chart of a communication method provided by an embodiment of the present application. The method can be interactively executed by a terminal device and a network device, wherein the terminal device can be the terminal device 120 or the terminal device 130 in the network architecture shown in FIG1 , and the network device can be the network device 110 in the network architecture shown in FIG1 . The method can include the following steps:

[0093] Step 401: The terminal device accesses the first subsystem according to the synchronization configuration and / or access configuration of the first subsystem; correspondingly, the network device accepts the terminal device's access to the first subsystem through the synchronization configuration and / or access configuration of the first subsystem.

[0094] In NR, terminals achieve synchronization, receive system messages, and access cells by searching for synchronization signal blocks (SSBs) within the frequency band. The cells a terminal accesses have no differences in capabilities or supported functions. Terminals with different capabilities report their capabilities to the network, which then allocates appropriate resources.

[0095] In the communication system network (such as the 6G network) involved in this application, due to the presence of subsystems with different capabilities and corresponding terminals with different capabilities / functions, when accessing the 6G network, the UE can access the corresponding network subsystem based on the capabilities / functions it supports. Specifically, 6G terminals have multiple capability sets. The terminal can activate only a portion of these capability sets to meet specific service requirements. The capabilities included in the capability set can be targeted at supporting specific services, such as eMBB, IoT, and URLLC. Taking the capability set corresponding to IoT as an example, since it mainly focuses on small data packet services with low requirements for peak rate and latency, requirements for supported bandwidth, number of antennas, half-duplex capability, mobility, processing time, and coding can be relaxed. The terminal hardware resources corresponding to this capability set can be activated individually, without activating all the terminal's hardware resources, thereby reducing power consumption. For example, when establishing eMBB services such as downloading, the terminal can activate the capability set corresponding to large bandwidth and high peak rate. Specifically, the capability set can also be targeted at different radio access technologies, such as NR, LTE, WCDMA, NB-IoT, MTC, GSM, and WiFi. In response to different radio access technologies, the UE may activate different capability sets. In other words, different capability sets may correspond to different supported air interface technologies.

[0096] In some embodiments, when two or more subsystems have different synchronization configurations, the synchronization configurations of the two or more subsystems indicate different resource locations for synchronization signals. The terminal device can search for the synchronization signal of the corresponding subsystem in different resource locations and access the corresponding subsystem.

[0097] For example, in an embodiment of the present application, when a terminal device needs to access the first subsystem, it can receive the synchronization signal of the first subsystem at the resource location of the synchronization signal of the first subsystem. Correspondingly, the network device sends the synchronization signal of the first subsystem at the resource location of the synchronization signal of the first subsystem.

[0098] Optionally, the frequency domain resource locations of the synchronization signals indicated by the synchronization configurations of two or more subsystems are different.

[0099] For example, the synchronization signals of two or more subsystems are located in different synchronization grids, or the synchronization signals of two or more subsystems are located in different bandwidth parts (BandWidth Part, BWP), etc.

[0100] In NR, terminals achieve synchronization, receive system messages, and access cells by searching for synchronization signal blocks (SSBs) within the frequency band. The cells a terminal accesses have no differences in capabilities or supported functions. Terminals with different capabilities report their capabilities to the network, which then allocates appropriate resources.

[0101] In some embodiments of the present application, different subsystems correspond to cell-defining synchronization signals at different frequency domain locations. For the network side, it can provide independent access to each subsystem. Each subsystem has a corresponding synchronization signal for searching the cell corresponding to the subsystem. The terminal can access the corresponding subsystem by searching for the synchronization signal. Optionally, the synchronization signal can refer to the cell-defining SSB used to access the cell in the NR to define the cell-defining synchronization signal specific to each subsystem.

[0102] Specifically, the synchronization signals corresponding to different subsystems can be located at different frequency domain locations, such as different synchronization rasters. For example, the frequency domain location of the synchronization signal block is defined by the synchronization raster, as shown in Table 1 below. In different frequency ranges, the possible frequency domain locations of the synchronization signal blocks are determined by the formula in the table and numbered using SSREF.

[0103] Table 1

[0104] That is to say, in the network deployment of the communication system involved in the present application, the cell search may also be based on the synchronization signal located on the synchronization grid, and the terminal may search for the synchronization signal at the corresponding synchronization grid.

[0105] For example, if a terminal currently needs to function as a wearable device, sensor, or other device, it can activate the corresponding capability set and access the network as an IoT device, such as a Reduced Capability (RedCap) terminal defined in NR. This terminal searches for the synchronization signal on the synchronization grid corresponding to the IoT subsystem in the network without searching other synchronization grids, which can reduce cell search latency and power consumption.

[0106] Alternatively, the time domain resource locations of the synchronization signals of two or more subsystems are different.

[0107] That is, the network device may send synchronization signals of different subsystems at different time domain locations. For example, the network device may send synchronization signals of different subsystems at different subframes, time slots, and / or symbols.

[0108] Alternatively, the time-frequency resource locations of the synchronization signals of two or more subsystems are different.

[0109] In some embodiments, when two or more subsystems have different synchronization configurations, the synchronization signals indicated by the synchronization configurations of the two or more subsystems are different.

[0110] Among them, different subsystems can have their own synchronization signals, and the synchronization signals of different subsystems are different. In this way, after searching / receiving the synchronization signal, the terminal device can use the synchronization signal to determine which subsystem it is, or use the synchronization signal to determine whether the corresponding subsystem is the subsystem currently to be accessed.

[0111] In some embodiments, at least one of the synchronization signal sequences, the scrambling methods of the synchronization signal sequences, and the encoding methods of the synchronization signal sequences of two or more subsystems is different.

[0112] The fact that the synchronization signals of the two or more subsystems are different may refer to that at least one of the synchronization signal sequences, scrambling methods, and encoding methods of the two or more subsystems are different.

[0113] In the NR system, the sequences of the primary synchronization signal (PSS) and the secondary synchronization signal (SSS) in the synchronization signal are m sequences. Through the PSS and SSS, the terminal can obtain the corresponding cell ID. The NR PSS is a pseudo-random sequence (BPSK M sequence) with a length of 127, occupying 127 SCs in the frequency domain. The initial values ​​x(6), x(5), x(4), x(3), x(2), x(1), and x(0) are 1, 1, 1, 0, 1, 1, and 0 respectively. Then, the initial sequence x(n) is obtained by recursion through x(i+7)=(x(i+4)+x(i))mod 2. The final PSS sequence is obtained by cyclically shifting the initial sequence by N_ID_(2) using m=(n+43*N_ID_(2))mod 127. SSS requires two polynomials to generate two initial sequences respectively, and then add N_ID_(1) and N_ID_(2) respectively during the cyclic shift. Now that N_ID_(1) is known, the UE can successfully detect the SSS based on the different values ​​of N_ID_(2). At this point, the UE knows the Cell ID.

[0114] In the embodiments of the present application, however, the synchronization signals corresponding to different subsystems can be different. For example, the synchronization signal sequences corresponding to different subsystems can have different cyclic shifts, or different cell IDs can be obtained based on the different cyclic shifts. The range of the synchronized cell IDs can be used to determine the subsystem corresponding to the cell. For another example, the initial sequence x(n) of the synchronization signal corresponding to different subsystems can be different. Different sequences can be generated for different subsystems using different sequence generation methods or by setting different initial values.

[0115] In some embodiments, the broadcast information of two or more subsystems is different.

[0116] Optionally, two or more subsystems have their own broadcast information. For example, for any of the two or more subsystems, the synchronization signal of the subsystem and the broadcast information can be transmitted correspondingly. For example, the synchronization signal of the subsystem and the transmission resource of the broadcast information are corresponding. After the terminal device searches for / receives a synchronization signal, it can determine the synchronization resource of the corresponding broadcast information through the transmission resource of the synchronization signal, and receive / parse the broadcast information on the corresponding synchronization resource.

[0117] In some embodiments, the broadcast information is used to indicate a subsystem corresponding to a synchronization signal associated with the broadcast information.

[0118] Among them, after the terminal device receives the broadcast information, it can determine through the broadcast information which subsystem the previously searched / received synchronization signal belongs to, or determine whether the previously searched / received synchronization signal belongs to the first subsystem to be accessed, and then determine whether to synchronize with and access the subsystem.

[0119] Optionally, the above broadcast information may carry information indicating the subsystem of the corresponding synchronization signal.

[0120] For example, the values ​​in one or more fields in the broadcast information may indicate which subsystem the corresponding synchronization signal is. For example, the values ​​in the one or more fields may be an identifier or index of the subsystem corresponding to the synchronization signal.

[0121] Alternatively, the broadcast information may also implicitly indicate which subsystem the corresponding synchronization signal belongs to.

[0122] In some embodiments, the synchronization signals of two or more subsystems have separately set synchronization signal setting information;

[0123] The synchronization signal setting information includes:

[0124] The transmission period of the synchronization signal, and / or the number of synchronization signal blocks in the synchronization signal set;

[0125] The synchronization signal set includes synchronization signal blocks used by the corresponding subsystem in different beam directions.

[0126] When the frequency band of a communication system is higher, the path loss of wireless signal transmission increases, and the wireless signal coverage decreases. In this case, using beamforming technology to form beams using the base station's multi-antenna system to increase wireless signal gain and compensate for path loss is a viable method. Beams are directional, and a narrow beam can only cover a portion of a cell and cannot cover all users in the cell. A base station can transmit signals using multiple beams in different directions. For a given beam, it typically only covers UEs in the corresponding beam direction, leaving UEs in other directions unreached.

[0127] The common channels and signals in the communication system involved in this application, such as synchronization signals and broadcast channels, may need to cover the entire cell through multi-beam scanning to facilitate reception by UEs in the cell. Multi-beam transmission of synchronization signals (SS, synchronization signal) can be achieved by defining a synchronization signal set. For example, a synchronization signal set contains one or more SS blocks. An SS block is used to carry the synchronization signal and broadcast channel of one beam. Optionally, an SS block may contain one symbol of PSS, one symbol of SSS and two symbols of physical broadcast channel (New Radio Access Technology-Physical broadcast channel, PBCH).

[0128] In two or more subsystems, the synchronization signal setting information between the subsystems may be different, or the synchronization signal setting information between the subsystems may not be completely the same.

[0129] For example, among two or more subsystems, the transmission period of the synchronization signal of any two subsystems and the number of synchronization signal blocks in the synchronization signal set are different; or, among two or more subsystems, the transmission period of the synchronization signal of any two subsystems is the same, and the number of synchronization signal blocks in the synchronization signal set is different; or, among two or more subsystems, the transmission period of the synchronization signal of any two subsystems is different, and the number of synchronization signal blocks in the synchronization signal set is the same.

[0130] Alternatively, among two or more subsystems, the synchronization signal setting information of some subsystems is the same and different from the synchronization signal setting information of another subsystem. For example, assume that there are four subsystems in the communication system, namely subsystem 1, subsystem 2, subsystem 3, and subsystem 4. The synchronization signal setting information of subsystem 1 and subsystem 2 is synchronization signal setting information 1, and the synchronization signal setting information of subsystem 3 and subsystem 4 is synchronization signal setting information 2. Moreover, at least one information item in synchronization signal setting information 1 and synchronization signal setting information 2 is different.

[0131] The synchronization signals corresponding to the subsystems can be independently configured, such as the default synchronization signal transmission period and the number of synchronization signals contained in the synchronization signal set, such as the number of SSBs contained in an SSB burst in NR, where each SSB corresponds to a beam. For the IoT subsystem, a specific maximum number of synchronization signals can be set by default within a certain frequency band. For example, compared to the eMBB subsystem, the IoT subsystem can have a lower maximum number of synchronization signals.

[0132] In some embodiments, the terminal device may further obtain subsystem configuration information of subsystems other than the first subsystem in the communication system through the first subsystem, and / or the terminal device may further obtain main system configuration information of the main system in the communication system through the first subsystem. Accordingly, the network device may send subsystem configuration information of subsystems other than the first subsystem in the communication system to the terminal device through the first subsystem, and / or send main system configuration information to the terminal device.

[0133] After the terminal device accesses the first subsystem, it can communicate with the network device through the first subsystem. At this point, the network device can send subsystem configuration information of other subsystems and / or main system configuration information to the terminal device. Optionally, after obtaining the subsystem configuration information of other subsystems and / or main system configuration information, the terminal device can perform corresponding operations, such as measuring other subsystems and / or main system, accessing other subsystems and / or main system, switching to other subsystems and / or main system, etc.

[0134] For example, the terminal device may receive the subsystem configuration information and / or main system configuration information of the above-mentioned other subsystems sent by the network device through RRC signaling.

[0135] In some embodiments, the subsystem configuration information or the main system configuration information includes one or more of the following information:

[0136] Cell ID, initial BWP, and system information.

[0137] Optionally, when the terminal accesses a subsystem, it can obtain configuration information of other subsystems or the main system through the subsystem, including cell ID, initial BWP, system information, etc.

[0138] In some embodiments, the communication system further includes a main system (such as the minimalist core described above), and the terminal device can access the main system and / or one or more subsystems outside the first subsystem while maintaining a connection with the first subsystem. Accordingly, the network device accepts the terminal device's access to the main system and / or one or more subsystems outside the first subsystem while maintaining a connection with the first subsystem.

[0139] In the above embodiment, the terminal device can simultaneously access the main system and multiple systems in one or more subsystems in the communication network.

[0140] Specifically, the terminal can also support simultaneous connection of multiple subsystems or main system and subsystems, for example, through dual connectivity, working on the main system and subsystem at the same time. Simultaneous connection can occur at the initial access node, for example, the terminal can search for and access cells in each subsystem or main system and subsystem respectively. At the same time, the establishment of a new connection can also occur after the terminal accesses the subsystem or main system, for example, through the RRC signaling of the network, to establish dual connection or multiple connections. At this time, the terminal can work independently in different subsystems. For the network, the terminal can be configured with the same UE identifier or different UE identifiers when working in different subsystems.

[0141] Step 402: The terminal device receives information about the subsystem in which the terminal device is working, as indicated by the network device; correspondingly, the network device indicates the information about the subsystem in which the terminal device is working to the terminal device.

[0142] For example, the network device may indicate to the terminal device information about the subsystem in which the terminal device operates through RRC signaling.

[0143] Among them, in the initial access stage, the terminal device can access a subsystem or main system in the network system. After the connection is established, the terminal device can switch the subsystem in which the terminal device works according to the instruction of the network device.

[0144] Optionally, the information of the subsystem in which the terminal device operates includes one or more of the following information:

[0145] BWP corresponding to the subsystem;

[0146] Configuration parameters of BWP.

[0147] In some embodiments, the subsystem in which the terminal device operates is determined by the network device using at least one of the following information:

[0148] The service type of the RRC connection established between the terminal device and the network;

[0149] A wireless bearer established between the terminal device and the network;

[0150] Parameters of the radio bearer.

[0151] Among them, when the terminal performs initial access, such as accessing the network's main system or minimalist core, or accessing a subsystem, and establishing an RRC connection with the network, the subsystem in which the terminal operates can be determined based on the service type, radio bearer type, and other parameters for establishing the RRC connection. The network can indicate information about the subsystem in which the terminal operates, such as the BWP corresponding to the subsystem, and BWP configuration parameters such as subcarrier spacing, CP length, number of antennas, half-duplex capability, mobility, processing time, coding, modulation mode, measurement capability, air interface technology, basic parameter set, receiver architecture, receiver type, receiver capability, maximum transmit power, and supported features. Supported features include coverage enhancement features.

[0152] In some embodiments, there is a corresponding relationship between the subsystem in which the terminal device operates and the radio bearer.

[0153] In some embodiments, when a radio bearer between a terminal device and a network device changes, the terminal device may receive a first switching instruction sent by the network device; based on the first switching instruction, the subsystem in which the terminal device operates may be switched. Accordingly, when a radio bearer between the terminal device and the network device changes, the network device may send a first switching instruction to the terminal device; the first switching instruction is used to instruct the subsystem in which the terminal device operates to be switched.

[0154] After establishing an RRC connection, changes in the radio bearer (RB) established between the terminal and the network, such as a signaling radio bearer or a data radio bearer, may cause changes in the terminal's operating subsystem. The network can switch the terminal's operating subsystem through indication information. In other words, when the network establishes a corresponding radio bearer (RB), the radio bearer corresponds to the terminal's operating subsystem.

[0155] In which, when the wireless bearer between the terminal device and the network device is switched from the first wireless bearer to the second wireless bearer, the network device sends a first switching indication to the terminal device, and the terminal device receives the first switching indication sent by the network device; the first wireless bearer corresponds to the second subsystem, and the second wireless bearer corresponds to the third subsystem; based on the first switching indication, the network device and / or the terminal device can switch the subsystem in which the terminal device works from the second subsystem to the third subsystem.

[0156] For example, after the terminal device accesses the first subsystem, the network device can establish a wireless bearer corresponding to the terminal device in the main system or other subsystems outside the first subsystem. For example, the network device establishes a corresponding wireless bearer based on the type of service to be established between the terminal device and the network device, and switches the wireless bearer of the terminal device to the newly established wireless bearer. In an embodiment of the present application, the configuration of the wireless bearer can be associated with a certain subsystem. When a new wireless bearer is established, the network device can trigger the corresponding subsystem switching.

[0157] In some embodiments, receiving, by a terminal device, information about a subsystem in which the terminal device operates as indicated by a network device, includes receiving information about a subsystem in which the terminal device operates as indicated by the network device via parameters in a radio bearer between the terminal device and the network device. Accordingly, the network device may send a first handover indication to the terminal device, including indicating, by means of parameters in a radio bearer between the terminal device and the network device, information about a subsystem in which the terminal device operates.

[0158] The network can indicate the subsystem in which the terminal operates and related configuration information in the corresponding radio bearer parameters, such as specific transmission resources or transmission resource configurations, such as LCH configuration, carrier configuration, MAC configuration, PUSCH resources, etc.

[0159] In some embodiments, when a terminal device has a service establishment requirement, it may send a service establishment request to a network device. The service establishment request is used by the network device to switch the subsystem of the terminal device based on the service established by the service establishment request. Accordingly, when a terminal device has a service establishment requirement, the network device receives the service establishment request sent by the terminal device and switches the subsystem of the terminal device based on the service established by the service establishment request.

[0160] In some embodiments, the terminal device indicates a service establishment requirement to the network device, including:

[0161] Send a service establishment request to the network device via NAS signaling;

[0162] Send a service establishment request to the network device through PDU session establishment signaling;

[0163] Sending a service establishment request to the network device during the PDU session establishment process;

[0164] Send a service establishment request to the network device through PDU session modification signaling;

[0165] Send a service establishment request to the network device during the PDU session modification process.

[0166] Accordingly, the network device receives the service establishment requirement indicated by the terminal device, including:

[0167] Receive a service establishment request sent by a terminal device via NAS signaling;

[0168] Receiving a service establishment request sent by a terminal device through a PDU session establishment signaling;

[0169] Receive a service establishment request sent by a terminal device during the PDU session establishment process;

[0170] Receiving a service establishment request sent by a terminal device via PDU session modification signaling;

[0171] Receive the service establishment request sent by the terminal device during the PDU session modification process.

[0172] For example, when the terminal has a need to establish a service, it can indicate to the network (for example, sending the above-mentioned service establishment request) through NAS signaling, such as service request signaling, or PDU session establishment signaling or process, or PDU session modification signaling or process, as auxiliary information for the network to decide to switch the corresponding subsystem.

[0173] In some embodiments, the terminal device may also switch the subsystem in which the terminal device operates according to the connection status of the terminal device.

[0174] In some embodiments, the connection state includes an idle state, an inactive state, or a connected state.

[0175] In some embodiments, the terminal device may also activate a capability set of the terminal device according to the subsystem in which the terminal device operates after switching.

[0176] For example, when the terminal is in different states, the subsystem in which the terminal works is switched. For example, when the terminal is in the idle / inactive state, the terminal can be in a low-capacity, power-saving state and can work in the corresponding subsystem. Under this subsystem, certain connection establishment and state transition delays are met at the same time. When the terminal is in the connected state, the terminal can switch to the corresponding subsystem according to the established business. When the terminal switches the subsystem, it can automatically activate the corresponding capability set. For example, when the terminal switches to the idle / inactive state, it can switch to the default capability set to work. When the terminal switches to the connected state, the terminal can switch to the corresponding capability set.

[0177] In some embodiments, there is a corresponding relationship between the subsystems in which the terminal device operates and the BWP.

[0178] In some embodiments, the correspondence between the subsystems in which the terminal device operates and the BWP is determined by the capability set of the terminal device.

[0179] Specifically, the network can configure BWPs for multiple subsystems for a terminal. The BWPs for the subsystems configured for the terminal can be determined based on the capability sets reported by the terminal. For example, if a terminal reports an IoT-related capability set and an eMBB-related capability set, corresponding to the subsystems in which the terminal can operate, the network can configure BWPs for the IoT subsystem and the eMBB subsystem for the terminal.

[0180] In some embodiments, when the BWP of the terminal device is switched, the terminal device or the network device may switch the subsystem in which the terminal device works to the subsystem corresponding to the new BWP.

[0181] In some embodiments, the BWP switching of the terminal device is instructed by the network device through RRC signaling, MAC layer signaling or physical layer signaling; or, the BWP switching of the terminal device is performed by the terminal device according to a specified trigger condition.

[0182] When the terminal switches to the corresponding BWP, the subsystem in which it works is also switched accordingly. Specifically, BWP switching can be indicated by RRC signaling, MAC layer signaling or physical layer signaling. Alternatively, the BWP is switched based on certain rules. For example, in NR, the network will configure the default BWP ID for the terminal through the defaultDownlinkBWP-Id information. Or, dormant DL BWP is configured for the terminal. These BWP types are designed to achieve energy saving for the terminal when there is no data scheduling. When the terminal determines that it needs to switch to these types of BWP according to the timer, it can activate / switch to the subsystem corresponding to the BWP type. When switching to other types of BWP, other subsystems can be activated / switched.

[0183] In some embodiments, when performing mobility measurements, the terminal device measures one or more cells, including the first cell corresponding to the second subsystem, the second cell corresponding to the second subsystem, and the third cell corresponding to the main system in the communication system; wherein the second subsystem is the subsystem in which the terminal device works; the first cell is the cell currently accessed by the terminal device, and the second cell and the third cell are adjacent cells of the first cell.

[0184] Although the network may support multiple subsystems, after a terminal accesses a subsystem within a cell through cell search, cell handovers due to terminal mobility must also be considered. Furthermore, subsystem coverage may not always be continuous; it may only be in hotspots. When cell handover or reselection is necessary, the terminal can be allowed to switch to another subsystem in another cell, such as the primary system in another cell. This assumes continuous coverage of the primary system to meet the network's wide coverage and terminal mobility requirements.

[0185] Specifically, the mobility measurement of the terminal may measure not only the signals of the corresponding subsystems in the neighboring cells of the cell where the currently working subsystem is located, but also the signals of other subsystems in the neighboring cells, such as the signal of the primary system.

[0186] Please refer to Figure 5, which shows a measurement diagram related to this application. As shown in Figure 5, a terminal operates in the IoT subsystem in cell 1. The terminal moves from cell 1 to cell 2. The terminal's mobility measurement result for cell 2 does not have a corresponding IoT subsystem, but does have a primary system for cell 2. The terminal then switches to cell 2 and operates in the primary system of cell 2.

[0187] Based on the solution shown in FIG3 , the communication system further includes a main system, and the terminal device can access the first subsystem through the main system.

[0188] Please refer to FIG6 , which shows a flow chart of a communication method provided by an embodiment of the present application. The method can be interactively executed by a terminal device and a network device, wherein the terminal device can be the terminal device 120 or the terminal device 130 in the network architecture shown in FIG1 , and the network device can be the network device 110 in the network architecture shown in FIG1 . The method can include the following steps:

[0189] Step 601: The network device sends a synchronization signal corresponding to the main system; the terminal device receives the synchronization signal corresponding to the main system.

[0190] In this embodiment, the network side can deploy a unified synchronization signal for the terminal device to perform cell search. Through this synchronization signal, the terminal device can access the main system, or the minimalist core mentioned above.

[0191] In step 602, the network device sends a broadcast message of the main system; after the terminal device is synchronized with the main system according to the synchronization signal corresponding to the main system, it receives the broadcast message of the main system; the broadcast message of the main system includes configuration information of one or more subsystems in the communication system; the one or more subsystems include the first subsystem.

[0192] After synchronization is complete, the terminal receives MIB information and system messages. System messages can indicate the subsystems associated with the main system and subsystem-related configuration information, such as the system messages corresponding to each subsystem. After receiving the system message of the corresponding subsystem, the terminal can proceed with the corresponding access process to access the target subsystem.

[0193] Step 603: The terminal device accesses the first subsystem based on the configuration information of the first subsystem; correspondingly, the network device accepts the terminal device's access to the first subsystem in the communication system based on the configuration information of the first subsystem.

[0194] In some embodiments, when two or more subsystems have different access configurations, the configuration information of one or more subsystems includes random access configuration information of one or more subsystems.

[0195] In some embodiments, one or more of the following information in the random access configuration information of one or more subsystems is different:

[0196] The time domain position of the random access channel PRACH;

[0197] Frequency domain location of PRACH;

[0198] And, random access preamble.

[0199] The above solution can simplify the cell search process of the terminal. The terminal only needs to search for the synchronization signal corresponding to the main system, obtain the configuration information of the subsystem in the obtained system message, and thus access the corresponding subsystem. Specifically, the subsystem configuration information may include the random access configuration information corresponding to the subsystem, including the time domain, frequency domain and preamble resources of the random access channel PRACH, which are used for random access by the terminal. Among them, the random access configuration information corresponding to different subsystems may have different configurations in one or more of the time domain, frequency domain or preamble of the PRACH, so that the network determines the subsystem to which the terminal accesses based on the PRACH sent by the terminal. Specifically, the subsystem configuration information may include different initial BWPs corresponding to the subsystems. Terminals accessing different subsystems can send PRACH in the corresponding initial uplink BWP and receive random access response information in the corresponding initial downlink BWP.

[0200] In some embodiments, the subsystem in which the terminal device operates is determined by the network device using at least one of the following information:

[0201] The service type of the RRC connection established between the terminal device and the network;

[0202] A wireless bearer established between the terminal device and the network;

[0203] Parameters of the radio bearer.

[0204] In some embodiments, there is a corresponding relationship between the subsystem in which the terminal device operates and the radio bearer.

[0205] In some embodiments, when a radio bearer between a terminal device and a network device changes, the terminal device may receive a first switching instruction sent by the network device; based on the first switching instruction, the subsystem in which the terminal device operates may be switched. Accordingly, when a radio bearer between the terminal device and the network device changes, the network device may send a first switching instruction to the terminal device; the first switching instruction is used to instruct the subsystem in which the terminal device operates to be switched.

[0206] In some embodiments, when the wireless bearer between the terminal device and the network device is switched from a first wireless bearer to a second wireless bearer, the network device sends a first switching indication to the terminal device, and the terminal device receives the first switching indication sent by the network device; the first wireless bearer corresponds to the second subsystem, and the second wireless bearer corresponds to the third subsystem; based on the first switching indication, the network device and / or the terminal device can switch the subsystem in which the terminal device works from the second subsystem to the third subsystem.

[0207] In some embodiments, receiving, by a terminal device, information about a subsystem in which the terminal device operates as indicated by a network device, includes receiving information about a subsystem in which the terminal device operates as indicated by the network device via parameters in a radio bearer between the terminal device and the network device. Accordingly, the network device may send a first handover indication to the terminal device, including indicating, by means of parameters in a radio bearer between the terminal device and the network device, information about a subsystem in which the terminal device operates.

[0208] In some embodiments, when a terminal device requires service establishment, the terminal device may send a service establishment request to a network device; the service establishment request is used by the network device to switch the operating subsystem of the terminal device based on the service established by the service establishment request. Accordingly, when a terminal device requires service establishment, the network device receives the service establishment request sent by the terminal device and switches the operating subsystem of the terminal device based on the service established by the service establishment request.

[0209] In some embodiments, the terminal device indicates a service establishment requirement to the network device, including:

[0210] Send a service establishment request to the network device via NAS signaling;

[0211] Send a service establishment request to the network device through PDU session establishment signaling;

[0212] Sending a service establishment request to the network device during the PDU session establishment process;

[0213] Send a service establishment request to the network device through PDU session modification signaling;

[0214] Send a service establishment request to the network device during the PDU session modification process.

[0215] Accordingly, the network device receives the service establishment requirement indicated by the terminal device, including:

[0216] Receive a service establishment request sent by a terminal device via NAS signaling;

[0217] Receiving a service establishment request sent by a terminal device through a PDU session establishment signaling;

[0218] Receive a service establishment request sent by a terminal device during the PDU session establishment process;

[0219] Receiving a service establishment request sent by a terminal device via PDU session modification signaling;

[0220] Receive the service establishment request sent by the terminal device during the PDU session modification process.

[0221] In some embodiments, the terminal device may also switch the subsystem in which the terminal device operates according to the connection status of the terminal device.

[0222] In some embodiments, the connection state includes an idle state, an inactive state, or a connected state.

[0223] In some embodiments, the terminal device may also activate a capability set of the terminal device according to the subsystem in which the terminal device operates after switching.

[0224] In some embodiments, there is a corresponding relationship between the subsystems in which the terminal device operates and the BWP.

[0225] In some embodiments, the correspondence between the subsystems in which the terminal device operates and the BWP is determined by the capability set of the terminal device.

[0226] In some embodiments, when the BWP of the terminal device is switched, the terminal device or the network device may switch the subsystem in which the terminal device works to the subsystem corresponding to the new BWP.

[0227] In some embodiments, the BWP switching of the terminal device is instructed by the network device through RRC signaling, MAC layer signaling or physical layer signaling; or, the BWP switching of the terminal device is performed by the terminal device according to a specified trigger condition.

[0228] In some embodiments, when performing mobility measurements, the terminal device measures one or more cells, including the first cell corresponding to the second subsystem, the second cell corresponding to the second subsystem, and the third cell corresponding to the main system in the communication system; wherein the second subsystem is the subsystem in which the terminal device works; the first cell is the cell currently accessed by the terminal device, and the second cell and the third cell are adjacent cells of the first cell.

[0229] In some embodiments, while maintaining a connection with the first subsystem, the terminal device can also access the main system and / or access one or more subsystems other than the first subsystem. Accordingly, while maintaining a connection with the first subsystem, the network device accepts the terminal device's access to the main system and / or accepts the terminal device's access to one or more subsystems other than the first subsystem.

[0230] The solution shown in the above embodiment of the present application enables the terminal to complete the cell search of the corresponding subsystem in a network deployed with multiple subsystems, thereby enabling the terminal to access the network with multiple subsystems. The delay and complexity of the cell search can be simplified. The solution shown in the above embodiment of the present application also provides a method for subsystem switching, including subsystem switching after establishing a connection with the network, as well as subsystem switching in the case of cell switching and reselection, thereby achieving power saving of the terminal and efficient use of network resources, as well as reliability of terminal switching.

[0231] Please refer to Figure 7, which shows a block diagram of a communication device provided by an embodiment of the present application. The communication device has the functions of implementing the methods shown in Figures 3, 4, or 6 above, which are performed by the terminal device. As shown in Figure 7, the device may include:

[0232] Access module 701 is configured to access a first subsystem in a communication system; the communication system includes a main system and two or more subsystems; the first subsystem is one of the two or more subsystems; the two or more subsystems respectively correspond to different services and / or capabilities, and the main system is configured to provide shared capabilities and / or resources for the two or more subsystems;

[0233] The two or more subsystems have different synchronization configurations and / or access configurations.

[0234] In some embodiments, when the two or more subsystems have different synchronization configurations, the synchronization configurations of the two or more subsystems indicate different resource locations of synchronization signals.

[0235] In some embodiments, the frequency domain resource locations of the synchronization signals indicated by the synchronization configurations of the two or more subsystems are different.

[0236] In some embodiments, the access module 701 is configured to receive the synchronization signal of the first subsystem at a resource location of the synchronization signal of the first subsystem.

[0237] In some embodiments, when the two or more subsystems have different synchronization configurations, the synchronization signals indicated by the synchronization configurations of the two or more subsystems are different.

[0238] In some embodiments, at least one of a synchronization signal sequence, a scrambling method of the synchronization signal sequence, and an encoding method of the synchronization signal sequence of the two or more subsystems is different.

[0239] In some embodiments, the broadcast information of the two or more subsystems is different.

[0240] In some embodiments, the broadcast information is used to indicate a subsystem corresponding to a synchronization signal associated with the broadcast information.

[0241] In some embodiments, the synchronization signals of the two or more subsystems have separately set synchronization signal setting information;

[0242] The synchronization signal setting information includes:

[0243] The transmission period of the synchronization signal, and / or the number of synchronization signal blocks in the synchronization signal set;

[0244] The synchronization signal set includes synchronization signal blocks used by the corresponding subsystem in different beam directions.

[0245] In some embodiments, the apparatus further includes: a configuration information acquisition module configured to acquire, through the first subsystem, subsystem configuration information of other subsystems in the communication system except the first subsystem.

[0246] In some embodiments, the subsystem configuration information includes one or more of the following information:

[0247] Cell ID, initial BWP, and system information.

[0248] In some embodiments, the access module 701 is configured to receive a synchronization signal corresponding to the main system; after synchronizing with the main system according to the synchronization signal corresponding to the main system, receive a broadcast message from the main system, where the broadcast message from the main system includes configuration information of one or more subsystems in the communication system; the one or more subsystems include the first subsystem;

[0249] Access the first subsystem based on the configuration information of the first subsystem.

[0250] In some embodiments, when the two or more subsystems have different access configurations, the configuration information of the one or more subsystems includes random access configuration information of the one or more subsystems.

[0251] In some embodiments, one or more of the following information in the random access configuration information of the one or more subsystems is different:

[0252] The time domain position of the random access channel PRACH;

[0253] Frequency domain location of PRACH;

[0254] And, random access preamble.

[0255] In some embodiments, the subsystem in which the terminal device operates is determined by the network device using at least one of the following information:

[0256] The service type of the RRC connection established between the terminal device and the network;

[0257] A radio bearer established between the terminal device and the network;

[0258] Parameters of the radio bearer.

[0259] In some embodiments, the apparatus further comprises:

[0260] A receiving module, configured to receive information of a subsystem on which the terminal device operates, as indicated by the network device;

[0261] The information of the subsystem in which the terminal device operates includes one or more of the following information:

[0262] BWP corresponding to the subsystem;

[0263] Configuration parameters of BWP.

[0264] In some embodiments, there is a corresponding relationship between the subsystem in which the terminal device operates and the radio bearer.

[0265] In some embodiments, the receiving module is configured to receive a first switching indication sent by the network device when a radio bearer between the terminal device and the network device changes;

[0266] The device further comprises:

[0267] A switching module is used to switch the subsystem in which the terminal device works based on the first switching indication.

[0268] In some embodiments, when a radio bearer between the terminal device and the network device changes, receiving a first switching indication sent by the network device includes:

[0269] When a radio bearer between the terminal device and the network device is switched from a first radio bearer to a second radio bearer, receiving a first switching indication sent by the network device; the first radio bearer corresponds to the second subsystem, and the second radio bearer corresponds to the third subsystem;

[0270] The switching module is configured to switch the operating subsystem of the terminal device from the second subsystem to the third subsystem based on the first switching instruction.

[0271] In some embodiments, the receiving module is used to receive information about a subsystem in which the terminal device operates, as indicated by parameters in a wireless bearer between the terminal device and the network device.

[0272] In some embodiments, the apparatus further comprises:

[0273] The request sending module is used to send a service establishment request to the network device; the service establishment request is used by the network device to switch the subsystem of the terminal device based on the service requested to be established by the service establishment request.

[0274] In some embodiments, the request sending module is used to:

[0275] Sending the service establishment request to the network device through NAS signaling;

[0276] Sending the service establishment request to the network device through PDU session establishment signaling;

[0277] Sending the service establishment request to the network device during the PDU session establishment process;

[0278] Sending the service establishment request to the network device through PDU session modification signaling;

[0279] The service establishment request is sent to the network device during the PDU session modification process.

[0280] In some embodiments, the switching module is used to switch the working subsystem of the terminal device according to the connection status of the terminal device.

[0281] In some embodiments, the connection state includes: an idle state, an inactive state, or a connected state.

[0282] In some embodiments, the apparatus further comprises:

[0283] The activation module is used to activate the capability set of the terminal device according to the subsystem of the terminal device after switching.

[0284] In some embodiments, there is a corresponding relationship between the subsystem of the terminal device and the BWP.

[0285] In some embodiments, the correspondence between the subsystems in which the terminal device operates and the BWP is determined by the capability set of the terminal device.

[0286] In some embodiments, the switching module is configured to switch the working subsystem of the terminal device to the subsystem corresponding to the new BWP when the BWP of the terminal device is switched.

[0287] In some embodiments, the BWP switching of the terminal device is instructed by the network device through RRC signaling, MAC layer signaling or physical layer signaling;

[0288] Alternatively, the BWP switching of the terminal device is performed by the terminal device according to a specified trigger condition.

[0289] In some embodiments, the apparatus further comprises:

[0290] a measurement module, configured to measure, when performing mobility measurement, one or more cells among a first cell corresponding to the second subsystem, a second cell corresponding to the second subsystem, and a third cell corresponding to the main system in the communication system;

[0291] The second subsystem is the subsystem in which the terminal device works; the first cell is the cell currently accessed by the terminal device, and the second cell and the third cell are adjacent cells of the first cell.

[0292] In some embodiments, the access module is further configured to access the main system while maintaining connection with the first subsystem, and / or access one or more subsystems other than the first subsystem.

[0293] Please refer to Figure 8, which shows a block diagram of a communication device provided by an embodiment of the present application. The communication device has the functions of implementing the methods shown in Figures 3, 4, or 6 above, which are performed by the network device. As shown in Figure 8, the device may include:

[0294] Access module 801 is configured to accept access from a terminal device to a first subsystem in a communication system; the communication system comprises a main system and two or more subsystems; the first subsystem is one of the two or more subsystems; the two or more subsystems respectively correspond to different services and / or capabilities, and the main system is configured to provide shared capabilities and / or resources for the two or more subsystems;

[0295] The two or more subsystems have different synchronization configurations and / or access configurations.

[0296] In some embodiments, when the two or more subsystems have different synchronization configurations, the synchronization configurations of the two or more subsystems indicate different resource locations of synchronization signals.

[0297] In some embodiments, the frequency domain resource locations of the synchronization signals of the two or more subsystems are different.

[0298] In some embodiments, the access module 801 is configured to send the synchronization signal of the first subsystem at a resource location of the synchronization signal of the first subsystem.

[0299] In some embodiments, when the two or more subsystems have different synchronization configurations, the synchronization signals indicated by the synchronization configurations of the two or more subsystems are different.

[0300] In some embodiments, at least one of a synchronization signal sequence, a scrambling method of the synchronization signal sequence, and an encoding method of the synchronization signal sequence of the two or more subsystems is different.

[0301] In some embodiments, the broadcast information of the two or more subsystems is different.

[0302] In some embodiments, the broadcast information is used to indicate a subsystem corresponding to a synchronization signal associated with the broadcast information.

[0303] In some embodiments, the synchronization signals of the two or more subsystems have separately set synchronization signal setting information;

[0304] The synchronization signal setting information includes: a transmission period of the synchronization signal, and / or the number of synchronization signal blocks in the synchronization signal set;

[0305] The synchronization signal set includes synchronization signal blocks used by the corresponding subsystem in different beam directions.

[0306] In some embodiments, the apparatus further includes: a first sending module configured to send subsystem configuration information of other subsystems in the communication system except the first subsystem to the terminal device through the first subsystem.

[0307] In some embodiments, the subsystem configuration information includes one or more of the following information: cell ID, initial BWP, and system message.

[0308] In some embodiments, the communication system further comprises a main system, wherein the access module 801 is configured to:

[0309] Sending a synchronization signal corresponding to the main system and a broadcast message of the main system; the broadcast message of the main system includes configuration information of one or more subsystems in the communication system; the one or more subsystems include the first subsystem;

[0310] Based on the configuration information of the first subsystem, the terminal device is allowed to access the first subsystem.

[0311] In some embodiments, when the two or more subsystems have different access configurations, the configuration information of the one or more subsystems includes random access configuration information of the one or more subsystems.

[0312] In some embodiments, one or more of the following information in the random access configuration information of the one or more subsystems is different:

[0313] The time domain position of the random access channel PRACH;

[0314] Frequency domain location of PRACH;

[0315] And, random access preamble.

[0316] In some embodiments, the subsystem in which the terminal device operates is determined by the network device using at least one of the following information:

[0317] The service type of the RRC connection established between the terminal device and the network;

[0318] A radio bearer established between the terminal device and the network;

[0319] Parameters of the radio bearer.

[0320] In some embodiments, the apparatus further includes: a second sending module configured to indicate to the terminal device information about a subsystem in which the terminal device operates; the information about the subsystem in which the terminal device operates includes one or more of the following information:

[0321] BWP corresponding to the subsystem;

[0322] Configuration parameters of BWP.

[0323] In some embodiments, there is a corresponding relationship between the subsystem in which the terminal device operates and the radio bearer.

[0324] In some embodiments, the apparatus further comprises:

[0325] The third sending module is used to send a first switching indication to the terminal device when the wireless bearer between the terminal device and the network device changes; the first switching indication is used to indicate the switching of the working subsystem of the terminal device.

[0326] In some embodiments, the third sending module is used to send the first switching indication to the terminal device when the wireless bearer between the terminal device and the network device is switched from the first wireless bearer to the second wireless bearer; the first wireless bearer corresponds to the second subsystem, and the second wireless bearer corresponds to the third subsystem; the first switching indication is used to instruct the terminal device to switch the working subsystem from the second subsystem to the third subsystem.

[0327] In some embodiments, the second sending module is used to indicate information about the subsystem in which the terminal device works to the terminal device through parameters in the wireless bearer between the terminal device and the network device.

[0328] In some embodiments, the apparatus further comprises:

[0329] A receiving module, configured to receive a service establishment request sent by the terminal device;

[0330] The first switching module is configured to switch the subsystem in which the terminal device operates based on the service requested to be established by the service establishment request.

[0331] In some embodiments, the receiving module is used to:

[0332] Receiving the service establishment request sent by the terminal device through NAS signaling;

[0333] Receiving the service establishment request sent by the terminal device through PDU session establishment signaling;

[0334] Receiving the service establishment request sent by the terminal device during the PDU session establishment process;

[0335] Receiving the service establishment request sent by the terminal device through PDU session modification signaling;

[0336] Receive the service establishment request sent by the terminal device during the PDU session modification process.

[0337] In some embodiments, there is a corresponding relationship between the subsystem of the terminal device and the BWP.

[0338] In some embodiments, the correspondence between the subsystems in which the terminal device operates and the BWP is determined by the capability set of the terminal device.

[0339] In some embodiments, the apparatus further includes: a second switching module configured to switch a working subsystem of the terminal device to a subsystem corresponding to a new BWP when the BWP of the terminal device is switched.

[0340] In some embodiments, the BWP switching of the terminal device is instructed by the network device through RRC signaling, MAC layer signaling or physical layer signaling;

[0341] Alternatively, the BWP switching of the terminal device is performed by the terminal device according to a specified trigger condition.

[0342] In some embodiments, the access module 801 is further used to accept the terminal device's access to the main system while the terminal device remains connected to the first subsystem, and / or to accept the terminal device's access to one or more subsystems outside the first subsystem.

[0343] It should be noted that the device provided in the above embodiment only uses the division of the above-mentioned functional modules as an example to implement its functions. In actual applications, the above-mentioned functions can be assigned to different functional modules according to actual needs, that is, the content structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0344] Regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0345] Please refer to FIG9 , which shows a schematic diagram of the structure of a communication device 900 provided in one embodiment of the present application. The communication device 900 may include: a processor 901 , a receiver 902 , a transmitter 903 , a memory 904 , and a bus 905 .

[0346] The processor 901 includes one or more processing cores. The processor 901 executes various functional applications and information processing by running software programs and modules.

[0347] Receiver 902 and transmitter 903 can be implemented as a communication component, which can be a communication chip. This communication chip can also be called a transceiver. Memory 904 is connected to processor 901 via bus 905. Memory 904 can be used to store computer programs, and processor 901 is used to execute the computer programs to implement the various steps in the above method embodiments.

[0348] In addition, the memory 904 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but not limited to: magnetic disk or optical disk, electrically erasable programmable read-only memory, erasable programmable read-only memory, static random access memory, read-only memory, magnetic memory, flash memory, and programmable read-only memory.

[0349] In an exemplary embodiment, when the communication device 900 is implemented as the above-mentioned terminal device, the receiver 902 and the processor 901 execute the computer program so that the communication device implements the various steps performed by the terminal device in any of the methods shown in Figures 3, 4 or 6.

[0350] In an exemplary embodiment, when the communication device 900 is implemented as the above-mentioned network device, the transmitter 903 and the processor 901 execute the computer program so that the communication device implements the various steps performed by the network device in any of the methods shown in Figures 3, 4 or 6.

[0351] An embodiment of the present application also provides a computer-readable storage medium, which stores a computer program. The computer program is loaded and executed by a processor to implement all or part of the steps performed by the terminal device or network device in the method shown in Figures 3, 4 or 6 above.

[0352] The present application also provides a chip, which is used to run in a communication device so that the communication device executes all or part of the steps performed by the terminal device or network device in the method shown in Figure 3, Figure 4 or Figure 6 above.

[0353] The present application also provides a computer program product, which includes computer instructions stored in a computer-readable storage medium. A processor of a communication device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the communication device to perform all or part of the steps performed by the terminal device or network device in the method shown in Figures 3, 4, or 6 above.

[0354] The present application also provides a computer program, which is executed by a processor of a communication device to implement all or part of the steps performed by a terminal device or a network device in the method shown in Figure 3, Figure 4 or Figure 6 above.

[0355] Those skilled in the art will appreciate that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any media that facilitates the transmission of computer programs from one place to another. The storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0356] The above description is merely an exemplary embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A communication method, characterized in that: The method is performed by a terminal device, and the method includes: A first subsystem in an access communication system; the communication system comprises a main system and two or more subsystems; the first subsystem is one of the two or more subsystems; the two or more subsystems respectively correspond to different services and / or capabilities, and the main system is used to provide shared capabilities and / or resources for the two or more subsystems; The two or more subsystems have different synchronization configurations and / or access configurations.

2. The method according to claim 1, characterized in that In the case that the two or more subsystems have different synchronization configurations, the resource locations of the synchronization signals indicated by the synchronization configurations of the two or more subsystems are different.

3. The method according to claim 2, characterized in that The frequency domain resource locations of the synchronization signals indicated by the synchronization configurations of the two or more subsystems are different.

4. The method according to claim 2 or 3, characterized in that: The first subsystem in the access communication system comprises: At a resource position of the synchronization signal of the first subsystem, a synchronization signal of the first subsystem is received.

5. The method according to any one of claims 1 to 4, characterized in that: In the case that the two or more subsystems have different synchronization configurations, the synchronization signals indicated by the synchronization configurations of the two or more subsystems are different.

6. The method according to claim 5, characterized in that At least one of a synchronization signal sequence, a scrambling method of the synchronization signal sequence, and an encoding method of the synchronization signal sequence of the two or more subsystems is different.

7. The method according to any one of claims 1 to 6, characterized in that: The broadcast information of the two or more subsystems is different.

8. The method according to claim 7, characterized in that The broadcast information is used to indicate a subsystem corresponding to a synchronization signal associated with the broadcast information.

9. The method according to any one of claims 1 to 8, characterized in that: The synchronization signals of the two or more subsystems have separately set synchronization signal setting information; The synchronization signal setting information includes: The transmission period of the synchronization signal, and / or the number of synchronization signal blocks in the synchronization signal set; The synchronization signal set includes synchronization signal blocks used by the corresponding subsystem in different beam directions.

10. The method according to any one of claims 1 to 9, characterized in that: The method further comprises: The subsystem configuration information of other subsystems in the communication system except the first subsystem is obtained through the first subsystem.

11. The method according to claim 10, characterized in that The subsystem configuration information includes one or more of the following information: Cell ID, initial BWP, and system messages.

12. The method according to claim 1, characterized in that The first subsystem in the access communication system comprises: Receiving a synchronization signal corresponding to the main system; After synchronizing with the main system according to a synchronization signal corresponding to the main system, receiving a broadcast message of the main system, wherein the broadcast message of the main system includes configuration information of one or more subsystems in the communication system; the one or more subsystems include the first subsystem; Based on the configuration information of the first subsystem, access the first subsystem.

13. The method according to claim 12, characterized in that In the case that the two or more subsystems have different access configurations, the configuration information of the one or more subsystems includes random access configuration information of the one or more subsystems.

14. The method according to claim 13, characterized in that The random access configuration information of the one or more subsystems is different in one or more of the following information: The time domain position of the random access channel PRACH; The frequency domain location of PRACH; And, random access preamble.

15. The method according to any one of claims 1 to 14, characterized in that: The subsystem in which the terminal device works is determined by the network device through at least one of the following information: The service type of the RRC connection established between the terminal device and the network; A radio bearer established between the terminal device and the network; Parameters of the radio bearer.

16. The method according to claim 15, characterized in that The method further comprises: Receiving information of a subsystem on which the terminal device works as indicated by the network device; The information of the subsystem in which the terminal device works includes one or more of the following information: BWP corresponding to the subsystem; Configuration parameters for BWP.

17. The method according to claim 15 or 16, characterized in that There is a corresponding relationship between the subsystems in which the terminal equipment works and the radio bearers.

18. The method according to claim 17, characterized in that The method further comprises: When a radio bearer between the terminal device and the network device changes, receiving a first switching indication sent by the network device; Based on the first switching indication, the subsystem in which the terminal device works is switched.

19. The method according to claim 18, characterized in that When a radio bearer between the terminal device and the network device changes, receiving a first switching indication sent by the network device includes: In a case where a radio bearer between the terminal device and the network device is switched from a first radio bearer to a second radio bearer, receiving a first switching indication sent by the network device; the first radio bearer corresponds to the second subsystem, and the second radio bearer corresponds to the third subsystem; The switching of the working subsystem of the terminal device based on the first switching indication includes: Based on the first switching indication, the subsystem in which the terminal device works is switched from the second subsystem to the third subsystem.

20. The method according to claim 16, characterized in that The receiving of information of the subsystem of the terminal device indicated by the network device includes: Receive information about the subsystem in which the terminal device works, indicated by parameters in a wireless bearer between the terminal device and the network device through the network device.

21. The method according to any one of claims 15 to 20, characterized in that: The method further comprises: A service establishment request is sent to the network device; the service establishment request is used by the network device to switch the subsystem of the terminal device based on the service requested by the service establishment request.

22. The method according to claim 21, characterized in that The sending a service establishment request to the network device comprises: Sending the service establishment request to the network device through NAS signaling; Sending the service establishment request to the network device through PDU session establishment signaling; Sending the service establishment request to the network device during the PDU session establishment process; Sending the service establishment request to the network device through PDU session modification signaling; The service establishment request is sent to the network device during the PDU session modification process.

23. The method according to any one of claims 15 to 22, characterized in that: The method further comprises: According to the connection status of the terminal device, the subsystem in which the terminal device works is switched.

24. The method according to claim 23, characterized in that The connection status includes: Idle, Inactive, or Connected.

25. The method according to claim 23 or 24, characterized in that The method further comprises: According to the subsystem in which the terminal device works after the switching, the capability set of the terminal device is activated.

26. The method according to any one of claims 15 to 25, characterized in that: There is a corresponding relationship between the subsystems in which the terminal equipment works and the BWP.

27. The method according to claim 26, characterized in that The correspondence between the subsystems in which the terminal device operates and the BWP is determined by the capability set of the terminal device.

28. The method according to claim 26 or 27, characterized in that When the BWP of the terminal device is switched, the subsystem in which the terminal device works is switched to the subsystem corresponding to the new BWP.

29. The method according to claim 28, characterized in that The BWP switching of the terminal device is indicated by the network device through RRC signaling, MAC layer signaling or physical layer signaling; or, The BWP switching of the terminal device is performed by the terminal device according to a specified trigger condition.

30. The method according to any one of claims 1 to 29, characterized in that: The method further comprises: When performing mobility measurement, measuring one or more cells among a first cell corresponding to the second subsystem, a second cell corresponding to the second subsystem, and a third cell corresponding to the main system in the communication system; The second subsystem is a subsystem in which the terminal device works; the first cell is a cell currently accessed by the terminal device; and the second cell and the third cell are adjacent cells of the first cell.

31. The method according to any one of claims 1 to 30, characterized in that: The method further comprises: While maintaining the connection with the first subsystem, access the main system, and / or access one or more subsystems other than the first subsystem.

32. A communication method, characterized in that: The method is performed by a network device, and the method includes: A first subsystem in a communication system receiving terminal equipment access; the communication system comprises a main system and two or more subsystems; the first subsystem is one of the two or more subsystems; the two or more subsystems respectively correspond to different services and / or capabilities, and the main system is used to provide shared capabilities and / or resources for the two or more subsystems; The two or more subsystems have different synchronization configurations and / or access configurations.

33. The method according to claim 32, characterized in that In the case that the two or more subsystems have different synchronization configurations, the resource locations of the synchronization signals indicated by the synchronization configurations of the two or more subsystems are different.

34. The method according to claim 33, characterized in that The frequency domain resource locations of the synchronization signals of the two or more subsystems are different.

35. The method according to claim 33 or 34, characterized in that Before the receiving terminal device accesses the first subsystem in the communication system, the method further includes: At the resource position of the synchronization signal of the first subsystem, a synchronization signal of the first subsystem is sent.

36. The method according to any one of claims 32 to 35, characterized in that In the case that the two or more subsystems have different synchronization configurations, the synchronization signals indicated by the synchronization configurations of the two or more subsystems are different.

37. The method according to claim 36, characterized in that At least one of a synchronization signal sequence, a scrambling method of the synchronization signal sequence, and an encoding method of the synchronization signal sequence of the two or more subsystems is different.

38. The method according to any one of claims 32 to 37, characterized in that: The broadcast information of the two or more subsystems is different.

39. The method according to claim 38, characterized in that The broadcast information is used to indicate a subsystem corresponding to a synchronization signal associated with the broadcast information.

40. The method according to any one of claims 32 to 39, characterized in that: The synchronization signals of the two or more subsystems have separately set synchronization signal setting information; The synchronization signal setting information includes: The transmission period of the synchronization signal, and / or the number of synchronization signal blocks in the synchronization signal set; The synchronization signal set includes synchronization signal blocks used by the corresponding subsystem in different beam directions.

41. The method according to any one of claims 32 to 40, characterized in that The method further comprises: Subsystem configuration information of other subsystems in the communication system except the first subsystem is sent to the terminal device through the first subsystem.

42. The method according to claim 41, characterized in that The subsystem configuration information includes one or more of the following information: Cell ID, initial BWP, and system messages.

43. The method according to claim 32, characterized in that The first subsystem of the receiving terminal device accessing the communication system comprises: Sending a synchronization signal corresponding to the main system and a broadcast message of the main system; the broadcast message of the main system includes configuration information of one or more subsystems in the communication system; the one or more subsystems include the first subsystem; Based on the configuration information of the first subsystem, the terminal device is allowed to access the first subsystem.

44. The method according to claim 43, characterized in that In the case that the two or more subsystems have different access configurations, the configuration information of the one or more subsystems includes random access configuration information of the one or more subsystems.

45. The method according to claim 44, characterized in that The random access configuration information of the one or more subsystems is different in one or more of the following information: The time domain position of the random access channel PRACH; The frequency domain location of PRACH; And, random access preamble.

46. ​​The method according to any one of claims 32 to 45, characterized in that The subsystem in which the terminal device works is determined by the network device through at least one of the following information: The service type of the RRC connection established between the terminal device and the network; A radio bearer established between the terminal device and the network; Parameters of the radio bearer.

47. The method according to claim 46, characterized in that The method further comprises: Indicating to the terminal device information of the subsystem in which the terminal device operates; The information of the subsystem in which the terminal device works includes one or more of the following information: BWP corresponding to the subsystem; Configuration parameters for BWP.

48. The method according to claim 46 or 47, characterized in that There is a corresponding relationship between the subsystems in which the terminal equipment works and the radio bearers.

49. The method according to claim 48, characterized in that The method further comprises: In the case where the wireless bearer between the terminal device and the network device changes, a first switching indication is sent to the terminal device; the first switching indication is used to indicate switching of a subsystem in which the terminal device works.

50. The method according to claim 49, characterized in that When a radio bearer between the terminal device and the network device changes, sending a first switching indication to the terminal device includes: When the radio bearer between the terminal device and the network device is switched from the first radio bearer to the second radio bearer, The terminal device sends the first switching indication; the first wireless bearer corresponds to the second subsystem, and the second wireless bearer corresponds to the third subsystem; the first switching indication is used to instruct the terminal device to switch the working subsystem from the second subsystem to the third subsystem.

51. The method according to claim 47, characterized in that The information indicating to the terminal device the subsystem in which the terminal device operates includes: Information about the subsystem in which the terminal device works is indicated to the terminal device through parameters in the wireless bearer between the terminal device and the network device.

52. The method according to any one of claims 46 to 51, characterized in that The method further comprises: Receiving a service establishment request sent by the terminal device; Based on the service requested to be established by the service establishment request, the subsystem in which the terminal device works is switched.

53. The method according to claim 52, characterized in that The receiving the service establishment request sent by the terminal device includes: Receiving the service establishment request sent by the terminal device through NAS signaling; Receiving the service establishment request sent by the terminal device through PDU session establishment signaling; Receiving the service establishment request sent by the terminal device during the PDU session establishment process; Receiving the service establishment request sent by the terminal device through PDU session modification signaling; Receive the service establishment request sent by the terminal device during the PDU session modification process.

54. The method according to any one of claims 46 to 53, characterized in that There is a corresponding relationship between the subsystems in which the terminal equipment works and the BWP.

55. The method according to claim 54, characterized in that The correspondence between the subsystems in which the terminal device operates and the BWP is determined by the capability set of the terminal device.

56. The method according to claim 54 or 55, characterized in that When the BWP of the terminal device is switched, the subsystem in which the terminal device works is switched to the subsystem corresponding to the new BWP.

57. The method according to claim 55, characterized in that The BWP switching of the terminal device is indicated by the network device through RRC signaling, MAC layer signaling or physical layer signaling; or, The BWP switching of the terminal device is performed by the terminal device according to a specified trigger condition.

58. The method according to any one of claims 32 to 57, characterized in that The method further comprises: In the case where the terminal device remains connected to the first subsystem, the terminal device is allowed to access the main system, and / or the terminal device is allowed to access one or more subsystems other than the first subsystem.

59. A communication device, characterized in that: The device comprises: An access module, used for accessing a first subsystem in a communication system; the communication system comprises a main system and two or more subsystems; the first subsystem is one of the two or more subsystems; the two or more subsystems respectively correspond to different services and / or capabilities, and the main system is used for providing shared capabilities and / or resources for the two or more subsystems; The two or more subsystems have different synchronization configurations and / or access configurations.

60. A communication device, characterized in that: The device comprises: An access module, used for accepting a terminal device to access a first subsystem in a communication system; the communication system comprises a main system and two or more subsystems; the first subsystem is one of the two or more subsystems; the two or more subsystems respectively correspond to different services and / or capabilities, and the main system is used to provide shared capabilities and / or resources for the two or more subsystems; The two or more subsystems have different synchronization configurations and / or access configurations.

61. A terminal device, characterized in that: The terminal device includes a processor, a memory and a transceiver; The memory stores a computer program, and the processor executes the computer program to enable the terminal device to implement the above The communication method according to any one of claims 1 to 31.

62. A network device, characterized in that: The terminal device includes a processor, a memory and a transceiver; The memory stores a computer program, and the processor executes the computer program so that the network device implements the communication method as described in any one of claims 32 to 58 above.

63. A computer-readable storage medium, characterized in that The storage medium stores a computer program, and the computer program is used to be executed by a processor of a communication device so that the communication device implements the communication method as described in any one of claims 1 to 58.

64. A chip, characterized in that: The chip is used to run in a communication device so that the communication device executes the communication method as described in any one of claims 1 to 58.

65. A computer program product, characterized in that The computer program product includes computer instructions, which are stored in a computer-readable storage medium; the processor of the communication device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, so that the communication device performs the communication method as described in any one of claims 1 to 58.

66. A computer program, characterized in that The computer program is executed by a processor of a communication device so that the communication device implements the communication method according to any one of claims 1 to 58.

Images