A communication method and apparatus

Abstract

A communication method and apparatus, relating to the field of communication technology, can be applied to non-terrestrial networks (NTNs), such as satellite communication networks. In this method, a terminal can obtain a first broadcast message through a corresponding SSB, and then send indication information through the resources indicated by the first broadcast message to trigger the network device to switch from power-saving mode to non-power-saving mode. That is, the first broadcast message is a broadcast message in power-saving mode, meaning the network device sends the first broadcast message in power-saving mode. This is beneficial for network device energy saving. Furthermore, since the network device is unaware of which cell the terminal might be randomly accessing, the resources indicated by the second broadcast message will include resources used for random access in different cells. The first broadcast message indicates fewer resources for sending the indication information compared to the number of resources indicated by the second broadcast message, which reduces resource indication overhead.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a communication method and apparatus. Background Technology

[0002] In communication technology, network devices can scan with beams in different directions at different times to achieve broadcast beam coverage of a cell. Specifically, in different beam directions, the network device can transmit system information blocks (SIBs), enabling terminals located within the coverage area of ​​each beam to perform random access. However, in non-terrestrial network (NTN) technology, the coverage area of ​​a single beam is very large, requiring network devices to consume more energy to cover a larger area with the transmitted signals (such as SIBs). Therefore, reducing the power consumption of network devices is a pressing technical problem that needs to be solved at present. Summary of the Invention

[0003] This application provides a communication method and apparatus that can reduce the power consumption of network devices.

[0004] Firstly, a communication method is provided, which can be executed by a terminal device. The terminal device can be a terminal, or a component within the terminal (e.g., a module, communication module, circuit or chip responsible for communication functions (such as a modem chip, also known as a baseband chip, or a system-on-a-chip (SoC) chip containing a modem core, or a system-in-package (SIP) chip), or a logical node, logical module, or software capable of implementing all or part of the functions of a communication device. The method includes: the terminal device receiving a first synchronization signal block (also known as a synchronization signal and physical broadcast channel block, SSB). The first SSB is used to acquire a first broadcast message, which indicates a first resource for sending first indication information. Thus, the terminal device can send the first indication information on the first resource. The first indication information is used to trigger a network device to switch from an energy-saving mode to a non-energy-saving mode. In the non-energy-saving mode, a second SSB from the network device is used to acquire a second broadcast message, which indicates a second resource for random access.

[0005] As can be seen, in the above embodiments, the terminal device can obtain the first broadcast message through the first SSB, and then send the first indication information through the first resource indicated by the first broadcast message to trigger the network device to switch from power-saving mode to non-power-saving mode. That is, the first broadcast message is a broadcast message in power-saving mode, meaning the network device sends the first broadcast message in power-saving mode. On one hand, this is beneficial for network device energy saving. On the other hand, the number of resources indicated by the first broadcast message is less than the number indicated by the second broadcast message. For example, the network device does not know which cell the terminal device might be randomly accessing, so the resources indicated by the second broadcast message may include resources for random access in different cells, resulting in a larger number of resources indicated by the second broadcast message. Therefore, indicating resources through the first broadcast message can reduce resource indication overhead. For example, if the first broadcast message is sent in an area with little or no business demand, the number of resources indicated by the first broadcast message is small, which can reduce resource waste. It can also enable terminal devices entering the area to trigger the network device to switch from energy-saving mode to non-energy-saving mode through the first indication information, so as to achieve random access through the second broadcast message. This ensures that terminal devices in the area can still communicate with the network device and reduces the occurrence of signal coverage gaps.

[0006] In one possible implementation, the first SSB is used to acquire the first broadcast message, including: the first broadcast message is scheduled by first control information, the first control information is carried on resources corresponding to a first search space and / or a first control resource set, and the first search space and / or the first control resource set is indicated by the first SSB. Alternatively, the first broadcast message is scheduled by the first control information, and the first control information is contained in the first SSB. The first SSB or the first control information is further used to indicate that the first broadcast message is a broadcast message in energy-saving mode.

[0007] As can be seen from the above embodiments, the terminal device can obtain a first search space and / or a first control resource set through a first SSB, so as to receive first control information on the resources corresponding to the first search space and / or the first control resource set, and obtain a first broadcast message through the first control information. This is equivalent to reusing the existing method to obtain broadcast messages in energy-saving mode, which can be compatible with existing protocols, reduce the impact on existing protocols, and improve backward compatibility of protocols. Alternatively, the first SSB includes first control information, so that the terminal device can obtain the first broadcast message through the first control information. This can improve the efficiency of the terminal device in obtaining the first broadcast message.

[0008] In one possible implementation, the first SSB is used to acquire the first broadcast message, including: the first broadcast message is contained within the first SSB. The first SSB is further used to indicate that the first broadcast message is a broadcast message in energy-saving mode.

[0009] As can be seen, in the above embodiments, the first broadcast message is included in the first SSB, which enables the terminal device to obtain the first broadcast message more efficiently.

[0010] In one possible implementation, the terminal device may further receive a second broadcast message, which is scheduled by second control information. The second control information is carried on resources corresponding to a second search space and / or a second control resource set, and the second search space and / or the second control resource set is indicated by a second SSB. The second control information or the second SSB may also be used to indicate that the second broadcast message is a broadcast message in a non-energy-saving mode.

[0011] As can be seen, in the above embodiments, the terminal device can also obtain a second broadcast message (i.e., a broadcast message in non-energy-saving mode), thereby enabling random access through the second broadcast message. For example, in areas with low or no service demand, a first broadcast message is sent first, causing terminal devices entering that area to trigger the network device to switch from energy-saving mode to non-energy-saving mode via a first indication message, thus enabling random access through the second broadcast message. This ensures that terminal devices in that area can still communicate with the network device, reducing the occurrence of signal coverage gaps.

[0012] In one possible implementation, the second broadcast message includes a first bitmap, where multiple bits in the first bitmap correspond to multiple Service Buses (SSBs) with different indices. A bit in the first bitmap with a first value indicates that the corresponding SSB in non-energy-saving mode has been sent, and a bit in the bitmap with a second value indicates that the corresponding SSB in energy-saving mode has not been sent. Optionally, the first value is 1 and the second value is 0. Alternatively, the first value is 0 and the second value is 1.

[0013] As can be seen from the above embodiments, the terminal device can also learn through the second broadcast message that the SSB in the non-energy-saving mode has been sent and the SSB in the energy-saving mode has not been sent, that is, the broadcast message is reused. This can both maintain compatibility with existing protocols and reduce the impact on existing protocols, and improve backward compatibility of protocols. In addition, it can also improve the success rate of the terminal device performing random access. For example, suppose there are SSB#0 to SSB#3, where SSB#2 is the SSB in energy-saving mode and the rest are SSBs in non-energy-saving mode. SSB#2 is indicated not to have been sent, and the rest of the SSBs are indicated to have been sent. The terminal device may use the random access channel transmission opportunity (RO) associated with SSB#0, the RO associated with SSB#1, or the RO associated with SSB#3 to perform random access. This ensures that the terminal device and the network device have a consistent understanding of the preamble on the corresponding RO, thereby ensuring the success rate of the terminal device performing random access.

[0014] In one possible implementation, the terminal device may also receive second indication information, which includes a second bit map, wherein multiple bits in the second bit map correspond to multiple SSBs with different indices, wherein a third value in a bit in the second bit map indicates that the corresponding SSB is an SSB in non-energy-saving mode, and a fourth value in a bit in the second bit map indicates that the corresponding SSB is an SSB in energy-saving mode.

[0015] As can be seen from the above embodiments, the terminal device can also learn which SSBs are in energy-saving mode and which are in non-energy-saving mode through the second indication information, enabling the terminal device to correctly use the RO associated with the SSB in non-energy-saving mode to perform random access. This ensures that the terminal device and the network device have a consistent understanding of the preamble on the corresponding RO, thereby ensuring the success rate of the terminal device performing random access.

[0016] In one possible implementation, the SSB in energy-saving mode and the SSB in non-energy-saving mode are respectively carried on different resources corresponding to the same search space. For example, the SSB in energy-saving mode and the SSB in non-energy-saving mode are respectively carried on different time slots corresponding to the same search space.

[0017] As can be seen from the above embodiments, the SSB in energy-saving mode and the SSB in non-energy-saving mode are respectively carried on different resources corresponding to the same search space, so that the terminal device can correctly decode the corresponding SSB.

[0018] In one possible implementation, the first broadcast message does not include one or more of the following: public configuration information, information for cell selection, information for cell access, control information related to connection establishment failure, scheduling information of system messages, emergency service support information, emergency call support information, timer configuration, access control information, or identification information related to connection recovery.

[0019] As can be seen, in the above embodiments, the first broadcast message may not include the contents listed above, that is, the first broadcast message contains less content, which can save instruction overhead.

[0020] In one possible implementation, the first broadcast message does not include one or more of the following: configuration information of the control resource set, configuration information of the search space, system frame number, subcarrier spacing, or whether access to the cell is prohibited.

[0021] As can be seen, in the above embodiments, the first broadcast message may not include the contents listed above, that is, the first broadcast message contains less content, which can save instruction overhead.

[0022] In one possible implementation, the first broadcast message also includes ephemeris information of the network device.

[0023] As can be seen, in the above embodiments, the first broadcast message also includes the ephemeris information of the network device, enabling the terminal device to accurately estimate the position of the network device at each time, and enabling the terminal device to correctly calculate the timing in advance, thereby reducing the problem of terminal device synchronization failure.

[0024] Secondly, a communication method is provided, which can be executed by a network device. The network device can be a network equipment, or a component within a communication device (e.g., a module, communication module, circuit or chip responsible for communication functions (such as a modem chip, or a SoC chip or SIP chip containing a modem core), chip system, or processor). It can also be a logical node, logical module, or software capable of implementing all or part of the communication device's functions. The method includes: the network device sending a first SSB, the first SSB being used to acquire a first broadcast message, the first broadcast message indicating a first resource for sending first indication information. Thus, the network device can receive the first indication information on the first resource. The first indication information is used to trigger the network device to switch from a power-saving mode to a non-power-saving mode. In the non-power-saving mode, a second SSB from the network device is used to acquire a second broadcast message, the second broadcast message indicating a second resource for random access.

[0025] As can be seen, in the above embodiments, the network device can send a first SSB, enabling the terminal device to obtain a first broadcast message through the first SSB. The terminal device can then send first indication information through the first resource indicated by the first broadcast message, triggering the network device to switch from energy-saving mode to non-energy-saving mode. In other words, the first broadcast message is a broadcast message in energy-saving mode; that is, the network device sends the first broadcast message in energy-saving mode. On one hand, this is beneficial for network device energy saving. On the other hand, the number of resources indicated by the first broadcast message is less than the number indicated by the second broadcast message. For example, the network device may not know which cell the terminal device might be randomly accessing, so the resources indicated by the second broadcast message might include resources for random access in different cells, resulting in a larger number of resources indicated by the second broadcast message. Therefore, indicating resources through the first broadcast message can reduce resource indication overhead. For example, if the first broadcast message is sent in an area with little or no business demand, the number of resources indicated by the first broadcast message is small, which can reduce resource waste. It can also enable terminal devices entering the area to trigger the network device to switch from energy-saving mode to non-energy-saving mode through the first indication information, so as to achieve random access through the second broadcast message. This ensures that terminal devices in the area can still communicate with the network device and reduces the occurrence of signal coverage gaps.

[0026] In one possible implementation, the first SSB is used to acquire the first broadcast message, including: the first broadcast message is scheduled by first control information, the first control information is carried on resources corresponding to a first search space and / or a first control resource set, and the first search space and / or the first control resource set is indicated by the first SSB. Alternatively, the first broadcast message is scheduled by the first control information, and the first control information is contained in the first SSB. The first SSB or the first control information is further used to indicate that the first broadcast message is a broadcast message in energy-saving mode.

[0027] As can be seen, in the above embodiments, the first broadcast message is scheduled by the first control information, which is carried on the resources corresponding to the first search space and / or the first control resource set. The first search space and / or the first control resource set is indicated by the first SSB. This is equivalent to reusing the existing method to obtain broadcast messages in energy-saving mode, which is compatible with existing protocols, reduces the impact on existing protocols, and improves backward compatibility of protocols. Alternatively, the first SSB includes the first control information, enabling the terminal device to obtain the first broadcast message through the first control information. This can improve the efficiency of the terminal device in obtaining the first broadcast message.

[0028] In one possible implementation, the first SSB is used to acquire the first broadcast message, including: the first broadcast message is contained within the first SSB. The first SSB is further used to indicate that the first broadcast message is a broadcast message in energy-saving mode.

[0029] As can be seen, in the above embodiments, the first broadcast message is included in the first SSB, which enables the terminal device to obtain the first broadcast message more efficiently.

[0030] In one possible implementation, the network device may further send a second broadcast message, which is scheduled by second control information. The second control information is carried on resources corresponding to a second search space and / or a second control resource set, and the second search space and / or the second control resource set is indicated by a second SSB. The second control information or the second SSB is also used to indicate that the second broadcast message is a broadcast message in a non-power-saving mode.

[0031] As can be seen, in the above embodiments, the network device can also send a second broadcast message, enabling the terminal device to obtain the second broadcast message (i.e., the broadcast message in non-energy-saving mode), thereby achieving random access through the second broadcast message. For example, in areas with low or no service demand, a first broadcast message is sent first, causing terminal devices entering that area to trigger the network device to switch from energy-saving mode to non-energy-saving mode via a first indication message, thus achieving random access through the second broadcast message. This ensures that terminal devices in that area can still communicate with the network device, reducing the occurrence of signal coverage gaps.

[0032] In one possible implementation, the second broadcast message includes a first bitmap, where multiple bits in the first bitmap correspond to multiple Service Buses (SSBs) with different indices. A bit in the first bitmap with a first value indicates that the corresponding SSB in non-energy-saving mode has been sent, and a bit in the first bitmap with a second value indicates that the corresponding SSB in energy-saving mode has not been sent. Optionally, the first value is 1 and the second value is 0. Alternatively, the first value is 0 and the second value is 1.

[0033] As can be seen, in the above implementation, the second broadcast message includes the first bitmap, enabling the terminal device to also know through the second broadcast message that the SSB in non-energy-saving mode has been sent and the SSB in energy-saving mode has not been sent, thus reusing the broadcast message. This not only ensures compatibility with existing protocols and reduces the impact on them, but also improves backward compatibility. Furthermore, it can improve the success rate of the terminal device performing random access. For example, suppose there are SSB#0 to SSB#3, where SSB#2 is the SSB in energy-saving mode and the remaining SSBs are SSBs in non-energy-saving mode. SSB#2 is indicated as not sent, and the remaining SSBs are indicated as sent. The terminal device may use the random access channel transmission opportunity (RACH occasion, RO) associated with SSB#0, the RO associated with SSB#1, or the RO associated with SSB#3 to perform random access. This ensures that the terminal device and the network device have a consistent understanding of the preamble on the corresponding RO, thereby ensuring the success rate of the terminal device performing random access.

[0034] In one possible implementation, the network device may further send a second indication information, which includes a second bit map, wherein multiple bits in the second bit map correspond to multiple SSBs with different indices, wherein a third value in a bit in the second bit map indicates that the corresponding SSB is an SSB in non-power-saving mode, and a fourth value in a bit in the second bit map indicates that the corresponding SSB is an SSB in power-saving mode.

[0035] As can be seen from the above embodiments, the network device can also send a second indication information, enabling the terminal device to determine which SSBs are in power-saving mode and which are in non-power-saving mode, thus allowing the terminal device to perform random access using the RO associated with the SSB in non-power-saving mode. This ensures that the terminal device and the network device have a consistent understanding of the preamble on the corresponding RO, thereby guaranteeing the success rate of the terminal device performing random access.

[0036] In one possible implementation, the SSB in energy-saving mode and the SSB in non-energy-saving mode are respectively carried on different resources corresponding to the same search space.

[0037] As can be seen from the above embodiments, the SSB in energy-saving mode and the SSB in non-energy-saving mode are respectively carried on different resources corresponding to the same search space, so that the terminal device can correctly decode the corresponding SSB.

[0038] In one possible implementation, the first broadcast message does not include one or more of the following: public configuration information, information for cell selection, information for cell access, control information related to connection establishment failure, scheduling information of system messages, emergency service support information, emergency call support information, timer configuration, access control information, or identification information related to connection recovery.

[0039] As can be seen, in the above embodiments, the first broadcast message may not include the contents listed above, that is, the first broadcast message contains less content, which can save instruction overhead.

[0040] In one possible implementation, the first broadcast message does not include one or more of the following: configuration information of the control resource set, configuration information of the search space, system frame number, subcarrier spacing, or whether access to the cell is prohibited.

[0041] As can be seen, in the above embodiments, the first broadcast message may not include the contents listed above, that is, the first broadcast message contains less content, which can save instruction overhead.

[0042] In one possible implementation, the first broadcast message also includes ephemeris information of the network device.

[0043] As can be seen, in the above embodiments, the first broadcast message also includes the ephemeris information of the network device, enabling the terminal device to accurately estimate the position of the network device at each time, and enabling the terminal device to correctly calculate the timing in advance, thereby reducing the problem of terminal device synchronization failure.

[0044] Thirdly, a communication apparatus is provided, comprising units, modules, or means for implementing the method as described in any one of the first or second aspects. The communication apparatus may be a terminal device or a network device.

[0045] Fourthly, a communication device is provided, comprising at least one processor. The at least one processor is configured to cause the communication device to perform the method described in any one of the first or second aspects. The communication device may be a terminal device or a network device. The at least one processor may execute a computer program or instructions stored in a memory to cause the described method to be performed. The memory may be included in the communication device or located externally. Furthermore, the communication device may also include an interface.

[0046] Fifthly, a computer-readable storage medium is provided, which stores computer instructions or programs that, when executed, cause a computer to perform the method as described in any one of the first or second aspects.

[0047] Sixthly, a computer program product is provided, comprising: a computer program or program that, when run by a computer, causes the computer to perform the method as described in any one of the first or second aspects.

[0048] A seventh aspect provides a chip including at least one processor for executing computer instructions or programs, which, when run, cause the chip to perform the method as described in any one of the first or second aspects. The processor may execute computer programs or instructions stored in memory to cause the described method to be performed. The memory may be included in the chip or located externally. Furthermore, the chip may include an interface.

[0049] Eighthly, a communication system is provided, comprising a terminal device for performing the method as described in any one of the first aspects and a network device for performing the method as described in any one of the second aspects. Attached Figure Description

[0050] Figure 1 As the basic architecture of a communication system;

[0051] Figure 2 This is a schematic diagram of the RAN architecture of an NTN-based device to which the embodiments of this application apply;

[0052] Figure 3 A flowchart illustrating a communication method provided in an embodiment of this application;

[0053] Figure 4 A schematic diagram illustrating whether an SSB is associated with an RO, provided as an embodiment of this application;

[0054] Figure 5 A schematic diagram illustrating different time slots within the same search space for SSBs with the same index, provided as an embodiment of this application;

[0055] Figure 6 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0056] Figure 7 This is a schematic diagram of another communication device provided in an embodiment of this application. Detailed Implementation

[0057] The technical solutions in the embodiments of this application will be described below with reference to the accompanying drawings. The terms "system" and "network" in the embodiments of this application can be used interchangeably. Unless otherwise stated, " / " indicates that the objects before and after are in an "or" relationship; for example, A / B can represent A or B. "And / or" in this application is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone, where A and B can be singular or plural. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be one or multiple. Furthermore, to facilitate a clear description of the technical solutions in the embodiments of this application, the terms "first" and "second" are used in the embodiments of this application to distinguish between network elements and similar items with essentially the same function. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and that the terms "first" and "second" are not necessarily different.

[0058] References to "one embodiment" or "some embodiments" in the embodiments described in this application mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0059] The following detailed embodiments further illustrate the objectives, technical solutions, and beneficial effects of this application. It should be understood that the following are merely specific embodiments of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made based on the technical solutions of this application should be included within the scope of protection of this application.

[0060] In the various embodiments of this application, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions between different embodiments are consistent and can be referenced by each other. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0061] The method provided in this application can be applied to various communication systems, such as wireless local area network (WLAN) systems, Internet of Things (IoT) systems, narrowband Internet of Things (NB-IoT) systems, long term evolution (LTE) systems, 5th generation (5G) communication systems, new radio (NR) systems, or new communication systems emerging in future communication development. Among these, IoT networks may include, but are not limited to, vehicle-to-everything (V2X) networks. The communication methods in V2X systems can be collectively referred to as vehicle-to-everything (V2X), where X can represent anything. For example, V2X can include: vehicle-to-vehicle (V2V) communication, vehicle-to-infrastructure (V2I) communication, vehicle-to-pedestrian (V2P) communication, or vehicle-to-network (V2N) communication, etc. The method provided in this application can also be applied to non-terrestrial network (NTN) communication systems, or scenarios where NTN and terrestrial network (TN) are integrated. The NTN system can be an NTN system integrated with 4G, 5G, or any future generation of communication systems, such as NR NTN, IoT NTN, etc. The NTN communication system can be, for example, a satellite communication system, or it can include unmanned aerial vehicles (UAVs), high altitude platform stations (HAPS), and other aerial access network equipment; this application does not limit this.

[0062] The method provided in this application can be applied between two entities in a communication system, such as one entity sending information to or receiving information sent by the other entity. In a wireless communication system, communication devices are included, and these devices can communicate wirelessly using air interface resources. Air interface resources may include at least one of time-domain resources, frequency-domain resources, code resources, and spatial resources; this application does not limit this. For example, the aforementioned two entities may include a network device and a terminal, or may include a chip that can be placed in a network device and a chip that can be placed in a terminal, etc. Of course, as standards advance, other types of entities may emerge subsequently; this application does not limit this.

[0063] The basic architecture of the communication system provided in the embodiments of this application is described below. The communication system provided in this application may include one or more network devices and one or more terminals.

[0064] The following is based on Figure 1 The system architecture shown is illustrated as an example. Figure 1 The communication system includes a network device 10 and a terminal 20 that communicates with the network device 10. Figure 1 The number of network devices and terminals shown is merely illustrative and should not be considered a specific limitation of this application. The terminals and network devices involved in the system architecture will be described in detail below.

[0065] I. Terminal

[0066] A terminal is an entity on the user side used to receive signals, or transmit signals, or both. Terminals are used to provide users with one or more of the following: voice services and data connectivity services. A terminal can be a device that includes wireless transceiver capabilities and can cooperate with network equipment to provide communication services to users. Specifically, a terminal can refer to user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, wireless communication equipment, user agent, user equipment, or roadside unit (RSU). Terminal equipment can also be a communication module with satellite communication capabilities, a satellite phone or its components, or a satellite communication terminal, such as a very small aperture terminal (VSAT) (commonly referred to as a VSAT terminal), a portable station, a fixed station, a vehicle-mounted or airborne satellite communication terminal, etc. It should be understood that a satellite communication terminal can act as a micro base station to further provide a data interface to the accessed user equipment.Terminals can also be drones, Internet of Things (IoT) devices, stations (STs) in wireless local area networks (WLANs), cellular phones, smartphones, cordless phones, wireless data cards, tablets, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistant (PDA) devices, laptop computers, machine type communication (MTC) terminals, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to a wireless modem, in-vehicle devices, wearable devices (also known as wearable smart devices), virtual reality (VR) terminals, augmented reality (AR) terminals, wireless terminals in remote medical care, wireless terminals in industrial control, wireless terminals in self-driving vehicles, wireless terminals in smart grids, and transportation security devices. Wireless terminals in smart cities, smart homes, etc., can be used in various contexts such as safety, security, and safety. The terminal can also be a terminal in a 5G system or a terminal in a next-generation communication system; this application does not limit the specific application to these possibilities.

[0067] The embodiments of this application do not limit the device form of the terminal. The device used to implement the functions of the terminal can be a complete machine; it can also be a device that supports the terminal in implementing the functions, such as a chip system. The device can be installed in the terminal or used in conjunction with the terminal. In the embodiments of this application, the chip system can be composed of chips, or it can include chips and other discrete components.

[0068] In one possible implementation, the terminal and terminal device in this application can be used interchangeably. The following description uses the terminal as an example and should not be regarded as a limitation of this application.

[0069] II. Network Equipment

[0070] A network device is an entity on the network side used to transmit signals, or receive signals, or both. A network device can be a means deployed in a radio access network (RAN) to provide wireless communication functionality to terminals.

[0071] In one possible scenario, network equipment can be devices with base station functions, such as evolved NodeBs (eNodeBs), transmitting and receiving points (TRPs), transmitting points (TPs), next-generation NodeBs (gNBs), base stations in future mobile communication systems, and integrated access and backhaul (IAB) nodes. Network equipment can also be transmission reception points (TRPs), base stations, and various forms of control nodes, such as network controllers and wireless controllers. Specifically, network equipment can be various forms of macro base stations, micro base stations (also known as small cells) in heterogeneous network (HetNet) scenarios, relay stations, access points (APs), radio network controllers (RNCs), node Bs (NBs), base station controllers (BSCs), base transceiver stations (BTSs), home base stations (e.g., home evolved node Bs, or home node Bs (HNBs)), baseband units (BBUs) and remote radio units (RRUs) in distributed base station scenarios, transmitting and receiving points (TRPs), transmitting points (TPs), mobile switching centers, etc., or even base station antenna panels. Control nodes can connect to multiple base stations and configure resources for multiple terminals covered by multiple base stations. Network equipment can also be satellites (or satellite base stations) or high altitude platform stations (HAPS), or base station equipment mounted on satellites / HAPSs. The satellite may include at least one of the following: a geostationary earth orbit (GEO) satellite (or geosynchronous orbit satellite) or a non-geostationary earth orbit (NGEO).Non-geostationary orbit satellites may include at least one of the following: medium Earth orbit (MEO) satellites or low Earth orbit (LEO) satellites. No limitation is made here. Network equipment may also be a gateway station (or ground station, earth station, signaling station, gateway, or gateway station), etc. In systems employing different wireless access technologies, the name of equipment with base station functions may vary. For example, it could be a gNB in ​​5G, or a network device in a network after 5G, or a network device in a future evolved public land mobile network (PLMN) network, or a device that performs base station functions in device-to-device (D2D) communication, machine-to-machine (M2M) communication, or vehicle-to-everything (V2X) communication, etc. This application does not limit the specific name of the network equipment. Network equipment may also be an open RAN (O-RAN or ORAN), a baseband pool (BBU pool) and RRU under a cloud radio access network (CRAN), etc.

[0072] In another possible scenario, multiple network devices collaborate to assist terminals in achieving wireless access, with each network device performing a portion of the base station's functions. For example, network devices may include a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). CUs and DUs can be separate entities or included in the same network element, such as a baseband unit (BBU). RUs may be included in radio equipment or radio units, such as remote radio units (RRUs), active antenna units (AAUs), or remote radio heads (RRHs). It is understood that network devices can be CU nodes, DU nodes, or devices comprising both CU and DU nodes. Furthermore, CUs can be classified as network devices in the access network (RAN) or in the core network (CN), without limitation.

[0073] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, in an ORAN system, CU can also be called O-CU (open CU), DU can also be called O-DU, CU-CP can also be called O-CU-CP, CU-UP can also be called O-CU-UP, and RU can also be called O-RU. For ease of description, this application uses CU, CU-CP, CU-UP, DU, and RU as examples. Any of the units among CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented through software modules, hardware modules, or a combination of software and hardware modules.

[0074] In this application embodiment, network devices deployed in the air can be referred to as NTN devices, and network devices deployed on the ground can be referred to as TN devices. That is, an NTN communication system includes at least one NTN device, and network devices in a TN communication system are TN devices. A TN device, relative to an NTN device, is a stationary or slower-moving network device. In other words, an NTN device, relative to a TN device, can be a high-speed mobile network device.

[0075] NTN equipment can include satellites, high-altitude platforms (HAPs), drones, or hot air balloons, etc., without limitation. Satellites can be medium Earth orbit (MEO) satellites, low Earth orbit (LEO) satellites, high altitude platform stations (HAPS), evolved NodeBs (eNBs), or 5G base stations (gNBs), etc.

[0076] In the case of NTN equipment being satellites, the satellites may have different functions in different scenarios, specifically:

[0077] 1. In Figure 2 In a transparent satellite architecture shown in Figure 2-1, the radio access network (RAN) may include remote radio units (RRUs) and base stations (such as...). Figure 2The RRU can include a satellite and an NTN gateway. The satellite is used for radio frequency filtering and frequency conversion and amplification to ensure that the waveform signal repeated by the payload remains unchanged. That is, the satellite primarily acts as a Layer 1 (L1) relay device, used to regenerate physical layer signals (i.e., radio frequency filtering, frequency conversion, and amplification), without involving other higher protocol layers. The NTN gateway supports all functions for forwarding new radio-Uu (NR-Uu) interface signals. The NR-Uu interface is the interface between the terminal and the base station in the protocol.

[0078] 2. In Figure 2 In the regenerative satellite architecture without inter-satellite link shown in Figure 2-2, the RAN includes satellites and NTN gateways. The satellites act as base stations, possessing base station processing functions. The NTN gateway is a transport network layer node and supports the corresponding transport protocols. The satellites and NTN gateways are connected via a satellite radio interface (SRI), with the NG interface (NG over SRI) responsible for higher-level information transmission.

[0079] 3. In Figure 2 In a regenerative satellite architecture with inter-satellite links, as shown in Figures 2-3, and... Figure 2 Similar to 2-2, the difference is that SRI exists, and multiple satellites can be connected via the Xn interface. The Xn interface is carried over SRI.

[0080] 4. In Figure 2In a regenerative satellite architecture with distributed unit (DU) processing capabilities, as shown in Figure 2-4, the satellite acts as a DU within the base station, jointly performing base station functions with the central unit (CU). An NTN gateway exists between the DU on the satellite and the CU on the ground. The NTN gateway is a transport network layer node that supports the corresponding transport protocols. The satellite and the NTN gateway are connected via an F1 interface, which is carried over the SRI (F1 over SRI).

[0081] 5. In a satellite architecture with integrated access and backhaul (IAB) functionality, the satellite acts as a base station with IAB functionality.

[0082] Among them, when the satellite acts as a Layer 1 relay device (i.e. Figure 2 In the transparent satellite architecture shown in Figure 2-1, the communication system may further include a base station. The base station can be an evolved universal terrestrial radio access (E-UTRA) system, an NR system, or a future radio access system as defined in the 3rd generation partnership project (3GPP). It can also be a WiFi system, enhanced mobile broadband (eMBB), ultra-reliable low latency communication (URLLC), massive machine-type communication (mMTC), a long-range Internet of Things (LoRa) system, or a vehicle-to-everything (V2X) system. The base station may also include two or more of the above-mentioned different radio access systems. The base station may also be an open radio access network (RAN) (O-RAN).

[0083] In this embodiment, the form of the network device is not limited. The device used to implement the function of the network device can be a complete machine; or it can be a device that supports the network device in implementing the function, such as a chip system. The device can be installed in the network device or used in conjunction with the network device.

[0084] In one possible implementation, the network device and network apparatus in this application can be used interchangeably. The following description uses a network device as an example and should not be regarded as a limitation of this application.

[0085] The embodiments of this application are described in detail below. The execution entity involved in the embodiments of this application may be a first communication device and a second communication device. The first communication device or the second communication device may be... Figure 1 or Figure 2 Any two devices capable of communication are permitted. The specific names of the first and second communication devices are not limited in this application. As an example, the first communication device may be a terminal, a chip or functional module of a terminal, etc., and the second communication device may be a network device, a chip or functional module of a network device, etc. As another example, the first communication device may be a network device, a chip or functional module of a network device, and the second communication device may be a terminal, a chip or functional module of a terminal. As yet another example, the first and second communication devices may be different terminals or network devices, etc. Specific forms of the first and second communication devices are not listed here. For ease of description, this application uses the example of the first communication device as a terminal and the second communication device as a network device to illustrate the embodiments, and this should not be considered a limitation of this application.

[0086] See Figure 3 , Figure 3 This is a flowchart illustrating a communication method provided in an embodiment of this application. For example... Figure 3 As shown, the method includes, but is not limited to, the following steps:

[0087] S301. The network device sends a first SSB, which is used to obtain a first broadcast message. The first broadcast message indicates a first resource for sending first indication information. The first indication information is used to trigger the network device to switch from power saving mode to non-power saving mode. In non-power saving mode, a second SSB from the network device is used to obtain a second broadcast message, which indicates a second resource for random access.

[0088] Accordingly, the terminal receives the first SSB.

[0089] The SSB mentioned in this application (such as the first SSB or the second SSB) can be used for time and frequency synchronization between the terminal and the network device, and can also be used for at least one of channel measurement (also known as channel estimation), radio resource management (RRM) measurement or radio link monitoring (RLM).

[0090] In one possible implementation, the SSB mentioned in this application can have at least one of the following implementations, specifically:

[0091] Implementation Method 1: SSB is used to indicate the control resource set (CORESET) and the search space.

[0092] In one possible implementation, the control resource set mentioned in this application may be control resource set zero (CORESET0), used to indicate the frequency domain resources where the control information for scheduling broadcast messages resides. Similarly, the search space mentioned above may be common search space zero (CSS0), used to indicate the time domain resources where the control information for scheduling broadcast messages resides.

[0093] In one possible implementation, the control information mentioned in this application can be existing control information or newly added control information. Existing control information can be control information in an existing version of a communication standard, such as downlink control information (DCI). Newly added control information can be newly defined control information, such as control information in a future communication standard. In one possible implementation, the control channel includes control information. In this application, a channel including corresponding information can also be described as: the channel carries corresponding information, the corresponding information is located in the channel, or the channel is used to transmit corresponding information. For example, a control channel including control information can also be described as: control information is carried in the control channel, control information is located in the control channel, the control channel carries control information, control information is contained in the control channel, or the control channel is used to transmit control information. In one possible implementation, the control channel can be a physical downlink control channel (PDCCH). PDCCH is an example of a control channel; in different systems and scenarios, the control channel may have different names, and this application does not limit this.

[0094] In one possible implementation, the frequency domain resources mentioned in this application refer to a continuous or discontinuous segment of resources in the frequency domain. For example, frequency domain resources can be characterized by subcarriers, resource blocks (RBs), or resource block groups (RBGs). For instance, taking the representation of frequency domain resources by subcarriers, frequency domain resources can be understood as one or more continuous subcarriers and / or one or more discontinuous subcarriers in the frequency domain. Similarly, the time domain resources mentioned in this application refer to a continuous or discontinuous segment of resources in the time domain. For example, time domain resources can be characterized by radio frames, subframes, time slots, symbols, or milliseconds. For instance, taking the representation of time domain resources by subframes, time domain resources can be understood as one or more continuous subframes and / or one or more discontinuous subframes in the time domain. In one possible implementation, the symbol here can be an orthogonal frequency-division multiplexing (OFDM) symbol. Alternatively, symbols and OFDM symbols can be used interchangeably.

[0095] In embodiment 1 above, the SSB, used to indicate the control resource set and search space, can be described as follows: The SSB includes a physical broadcast channel (PBCH), which indicates the control resource set and search space. For example, the PBCH includes a master information block (MIB), which indicates the control resource set and search space. For instance, the MIB includes configuration information for the control resource set and configuration information for the search space. The configuration information for the control resource set may include at least one of the following: the identifier of the control resource set, frequency domain resources, and the number of symbols in the time domain. The configuration information for the search space may include the identifier of the search space and / or the identifier of the control resource set corresponding to the search space.

[0096] In one possible implementation, the MIB may also indicate other content besides those listed above, such as system frame number, subcarrier spacing, and whether access is prohibited in the cell. This application does not limit this information. This application uses PBCH as an example for illustration, but it does not limit the scope of this application. In different systems and scenarios, the physical broadcast channel may be defined by other terms or concepts, all of which are applicable to the technical solutions of this application. In this application, physical broadcast channel and PBCH may be used interchangeably; PBCH can be considered an example description of the physical broadcast channel.

[0097] In one possible implementation, in embodiment 1 above, the SSB may further include a synchronization signal. For example, a primary synchronization signal (PSS) and / or a secondary synchronization signal (SSS).

[0098] Implementation Method 2: The SSB is used to indicate control information for scheduling broadcast messages. For example, the SSB includes the PBCH, and the PBCH includes this control information. In this case, the PBCH may also include synchronization signals, such as the PSS and / or SSS. In one possible implementation, the PBCH may also indicate other content besides those listed here, such as the system frame number, whether access to the cell is prohibited, etc., which is not limited in this application.

[0099] Implementation Method 3: The SSB is used to indicate a broadcast message. For example, the SSB includes the PBCH, which includes the broadcast message. In this case, the PBCH may also include synchronization signals such as the PSS and / or SSS.

[0100] In this context, the broadcast message in Embodiment 1, Embodiment 2, or Embodiment 3 can be an existing broadcast message or a newly added broadcast message. An existing broadcast message can be a broadcast message in an existing version of a communication standard. For example, the broadcast message in Embodiment 1 or Embodiment 2 can be SIB1, and the broadcast message in Embodiment 3 can be MIB. The specific naming of the broadcast message does not limit the scope of protection of this application. A newly added broadcast message can be a newly defined broadcast message, such as a broadcast message in a future communication standard.

[0101] The following describes the 'contents related to the first SSB' in conjunction with any one of the above embodiments 1 to 3.

[0102] The first SSB is one of multiple SSBs. For example, a network device sends multiple SSBs, and a terminal can receive multiple SSBs, thus selecting the SSB with the highest energy among them as the first SSB. For instance, the SSB with the highest reference signal received power (RSRP), reference signal received quality (RSRQ), or received signal strength indicator (RSSI) among the multiple SSBs can be selected as the first SSB.

[0103] In one possible implementation, the first SSB is used to acquire the first broadcast message, which can be understood as at least one of the following situations, specifically:

[0104] In the first scenario, the first broadcast message is scheduled by first control information, which is carried on resources corresponding to the first search space and / or the first control resource set. The first search space and / or the first control resource set is indicated by the first SSB. That is, the first SSB here is similar to the SSB in Embodiment 1 above, and will not be described in detail here. In this case, the first broadcast message can be called SIB1 or other broadcast messages, and its specific naming does not limit the scope of protection of this application.

[0105] In the second scenario, the first broadcast message is scheduled by the first control information, which is contained in the first SSB. That is, the first SSB here is similar to the SSB in embodiment 2 described above, and will not be repeated here. In this case, the first broadcast message can be called SIB1 or other broadcast messages, and its specific naming does not limit the scope of protection of this application.

[0106] In the third scenario, the first broadcast message is included in the first SSB. That is, the first SSB here is similar to the SSB in embodiment 3 above, and will not be described in detail here. In this case, the first broadcast message can be called a MIB or other broadcast message, and its specific naming does not limit the scope of protection of this application.

[0107] In one possible implementation, the first SSB in the first to third scenarios described above is further used to indicate that the first broadcast message is a broadcast message in energy-saving mode. Alternatively, the first control information in the first or second scenario described above is further used to indicate that the first broadcast message is a broadcast message in energy-saving mode. For the former, the first broadcast message being a broadcast message in energy-saving mode can be indicated by different values ​​of the first SSB, by different values ​​of some bits in the first SSB, by different values ​​of at least one field in the first SSB, or by different values ​​of some bits of at least one field in the first SSB. For the latter, the first broadcast message being a broadcast message in energy-saving mode can be indicated by different values ​​of the first control information, by different values ​​of some bits in the first control information, by different values ​​of at least one field in the first control information, or by different values ​​of some bits of at least one field in the first control information.

[0108] For example, consider a 1-bit indication in the first SSB or first control information that the first broadcast message is a broadcast message in energy-saving mode. A 1-bit value of '1' indicates that the first broadcast message is a broadcast message in energy-saving mode. A 1-bit value of '0' indicates that the first broadcast message is not a broadcast message in energy-saving mode. Alternatively, a 1-bit value of '0' indicates that the first broadcast message is a broadcast message in energy-saving mode. A 1-bit value indicates that the first broadcast message is not a broadcast message in energy-saving mode. In one possible implementation, the first broadcast message not being a broadcast message in energy-saving mode is also described as: the first broadcast message being a broadcast message in non-energy-saving mode.

[0109] Among them, energy-saving mode and non-energy-saving mode are relative concepts.

[0110] For example, the main function of SIB1 in non-energy-saving mode is to configure the primary cell (PCell), enabling idle terminals to monitor paging messages or to complete uplink timed synchronization via random access, thus entering the connected state. In this case, SIB1 in non-energy-saving mode includes all information about the terminal's access to the network device. In contrast, SIB1 in energy-saving mode allows idle terminals to trigger the network device to switch from energy-saving mode to non-energy-saving mode. That is, SIB1 in energy-saving mode includes resources for sending corresponding indication information (which triggers the network device to switch from energy-saving mode to non-energy-saving mode). In other words, broadcast messages in energy-saving mode contain less information than those in non-energy-saving mode.

[0111] For example, an SSB in non-energy-saving mode is used to retrieve broadcast messages containing more information, such as a broadcast message in non-energy-saving mode. An SSB in energy-saving mode is used to retrieve broadcast messages containing less information, such as a broadcast message in energy-saving mode. Alternatively, an SSB in non-energy-saving mode is associated with at least one RO, while a broadcast message in energy-saving mode is not associated with any RO. For example, in Figure 4 In this example, assume there are 4 SSBs. SSB#0, SSB#1, and SSB#3 are SSBs in non-energy-saving mode, each associated with 2 ROs. SSB#2 is an SSB in energy-saving mode and is not associated with any RO.

[0112] In one possible implementation, the SSB in non-energy-saving mode can be the SSB in implementation 1 or implementation 2 above, and the SSB in energy-saving mode can be the SSB in implementation 1, implementation 2 or implementation 3 above, which will not be elaborated here.

[0113] In one possible implementation, the SSB in energy-saving mode and the SSB in non-energy-saving mode can have the same or different indices, which is not limited here. When the SSB in energy-saving mode and the SSB in non-energy-saving mode have the same index, the number of SSB indices can be reduced, thereby reducing the overhead of control information indication.

[0114] In one possible implementation, the SSB in energy-saving mode and the SSB in non-energy-saving mode are respectively carried on different resources corresponding to the same search space. For example, the SSB in energy-saving mode and the SSB in non-energy-saving mode are respectively carried on different time slots corresponding to the same search space. For example, taking two consecutive time slots (denoted as time slot #n0 and time slot #n1) corresponding to the same search space as an example, in Figure 5 In this context, there are two SSBs with the same index, such as two SSB#1s. One SSB#1 is the SSB in energy-saving mode, and the other SSB#1 is the SSB in non-energy-saving mode. The SSB in energy-saving mode is carried in time slot #n0, and the SSB in non-energy-saving mode is carried in time slot #n1. Alternatively, the SSB in energy-saving mode is carried in time slot #n1, and the SSB in non-energy-saving mode is carried in time slot #n0.

[0115] In one possible implementation, broadcast messages in energy-saving mode can be replaced with other descriptions, such as broadcast messages for deactivating (or deactivating) beam directions, or broadcast messages for energy-saving beam directions. Broadcast messages in non-energy-saving mode can be replaced with other descriptions, such as broadcast messages for activating beam directions, or broadcast messages for non-energy-saving beam directions. Similarly, SSBs in energy-saving mode can be replaced with other descriptions, such as SSBs for deactivating (or deactivating) beam directions, or SSBs for energy-saving beam directions. SSBs in non-energy-saving mode can be replaced with other descriptions, such as SSBs for activating beam directions, or SSBs for non-energy-saving beam directions. These descriptions are used for differentiation and their specific naming does not limit the scope of protection of this application.

[0116] The following is a description of the relevant content of the aforementioned first broadcast message.

[0117] The first broadcast message indicates a first resource for sending the first indication information; that is, the first broadcast message can be considered to include resource configuration, which is used to indicate the first resource. For example, the time-domain resources and / or frequency-domain resources of the first resource.

[0118] In one possible implementation, the first broadcast message may further include information for uplink synchronization, such as the ephemeris information and / or common timing advance of the network device. The network device may be an NTN device, which can be a satellite. Therefore, the ephemeris information of the network device is also referred to as the ephemeris information of the local satellite.

[0119] Taking an NTN device as an example, where the network device is an NTN device and the NTN device is a satellite, the ephemeris information mentioned in this application can be used to indicate the satellite's position or coverage. For example, this ephemeris information can be information about the satellite's motion patterns, such as at least one of the satellite's orbital parameters, angular velocity, and speed. Based on this information, the terminal can calculate the satellite's position in its orbit at each moment. Ephemeris information can be represented as a simple correspondence, such as the satellite position information corresponding to each moment / time period. Ephemeris information can also be represented as a satellite coverage map, such as satellite coverage availability information. A satellite coverage map can divide the Earth's surface into multiple grid points and show the grid points covered and uncovered by the satellite at each moment. For example, the satellite's orbital period around the Earth is one hour, with an accuracy of minutes. Each minute, the satellite corresponds to a satellite coverage map, where some grid points are lit and some are dark. The lit grid points represent the grid points that the satellite will cover at that corresponding moment in each cycle.

[0120] In one possible implementation, the ephemeris information involved in this application includes, but is not limited to, traditional ephemeris information, satellite map information, and NTN gateway deployment information. Traditional ephemeris information includes, but is not limited to, orbital parameters, or parameters such as the satellite's azimuth calculated based on orbital parameters. Traditional ephemeris information can be used to calculate, predict, depict, or track the satellite's flight time, position, velocity, and other states. For example, traditional ephemeris information can be 17 bytes of information to represent position (78 bits) and velocity (54 bits), or traditional ephemeris information can be 18 bytes of information to represent orbital parameters (e.g., semi-major axis, range, eccentricity, perigee distance, etc.). Satellite map information can be the area covered by the satellite on a map at each moment. This application does not limit the specific form, content, and name of the ephemeris information; reference can be made to the definitions of ephemeris information in existing protocols. For example, in this application, ephemeris information can also be referred to as satellite coverage availability information.

[0121] In one possible implementation, the first broadcast message does not include ephemeris information of other network devices adjacent to the network device. Here, the network device is an NTN device, the NTN device is a satellite, and the other network devices adjacent to the network device are also satellites. In this case, the ephemeris information of the other network devices adjacent to the network device can also be referred to as the ephemeris information of neighboring satellites or the ephemeris information of the corresponding satellite in the neighboring cell. That is, the first broadcast message does not include the ephemeris information of neighboring satellites. The ephemeris information of the network device, the common timing advance, and the ephemeris information of other network devices adjacent to the network device can be included in the NTN parameter information (or satellite auxiliary information), which can be located in SIB19. In other words, the first broadcast message can include some information from SIB19, such as the ephemeris information and common timing advance of the network device.

[0122] In one possible implementation, when the name of the first broadcast message is SIB1 (i.e., the first or second case described above), the first broadcast message does not include one or more of the following (e.g., it does not include all of the following, or some of the following information, or one of the following information):

[0123] I. Common Configuration Information. Common configuration information, also known as serving cell common configuration parameters (servingCellConfigCommon), includes at least one of the following:

[0124] 1. Initial Downlink Bandwidth Configuration. The initial downlink bandwidth configuration may include at least one of the following: subcarrier spacing, cyclic prefix, or BWP location and bandwidth.

[0125] 2. Downlink frequency information (frequencyinfoDL). Downlink frequency information may include at least one of the following: frequencyBandList, offsetToPointA, or subcarrier-specific carrierList, etc.

[0126] 3. Paging Channel (PCH) Configuration. Paging channel configuration may include at least one of the following: paging record list, system information change, UE identity, or core network domain. The UE identity may be a System Architecture Evolution Temporary Mobile Subscriber Identity (S-TMSI) or an International Mobile Subscriber Identity (IMSI). The core network domain may be a circuit-switched domain or a packet-switched domain.

[0127] 4. Random Access Channel (RACH) Common Configuration (RACH-ConfigCommon). The random access common configuration may include at least one of the following: random access resources (including time-domain resources and / or frequency-domain resources), total number of preambles, at least one preamble index, maximum number of preamble transmissions, initial preamble transmit power, preamble power ramping step, random access-response window size, maximum number of retransmissions for the hybrid automatic repeat request (HARQ) of Message 3 (msg3), or the timing of the mac-contention resolution timer, etc.

[0128] 5. Physical uplink shared channel (PUSCH) common configuration (PUSCH-ConfigCommon). The PUSCH common configuration may include at least one of the following: PUSCH format, first symbol, number of symbols in the time slot, physical resource block (PRB) offset, or set of initial CS index, etc.

[0129] 6. Common configuration of the physical uplink control channel (PUCCH). The PUCCH common configuration may include at least one of the following: PUCCH format, start symbol, number of symbols in the time slot, physical resource block offset, or cyclic offset index, etc.

[0130] The common configuration parameters for serving cells in this application are not limited to those listed above. For specific details, please refer to existing or newly added common configuration parameters for serving cells. Existing common configuration parameters for serving cells can be those found in existing versions of communication standards, such as the common configuration parameters included in SIB1 communication standards. Newly added common configuration parameters for serving cells can be newly defined, such as those in future communication standards.

[0131] II. Information used for cell selection. The information used for cell selection can also be called cell selection related parameters (cellSelectionInfo), as shown in Table 1, and may include at least one of the following: q-RxLevMin, q-RxLevMinOffset, q-RxLevMinSUL, q-QualMin, or q-QualMinOffset, etc.

[0132] Table 1

[0133]

[0134] The cell selection parameters in this application are not limited to those listed above. For specific details, please refer to existing or newly added cell selection parameters. Existing cell selection parameters can be those from existing versions of communication standards, such as the cell selection parameters included in SIB1 communication standards. Newly added cell selection parameters can be newly defined cell selection parameters, such as those from future communication standards.

[0135] III. Information Used for Cell Access. Information used for cell access, also known as cellAccessRelatedInfo, includes at least one of the following: network identifier, cell identifier, tracking area code (TAC), and cell reservation indication. The network identifier can identify a network operator supported by the network device. For example, the network identifier can be a public land mobile network (PLMN) identifier. The cell identifier can be used to uniquely identify a cell, such as the cell global identifier (CGI) or physical cell identifier (PCI).

[0136] The cell access-related parameters in this application are not limited to those listed above. For specific details, please refer to existing or newly added cell access-related parameters. Existing cell access-related parameters can be those from existing versions of communication standards, such as the cell access-related parameters included in SIB1 communication standards. Newly added cell access-related parameters can be newly defined cell access-related parameters, such as those from future communication standards.

[0137] IV. Control information related to connection establishment failure. Control information related to connection establishment failure can also be called connection establishment failure control parameters (ConnEstFailureControl), including: the number of connection establishment failures and / or the offset of connection establishment failures, etc.

[0138] The connection establishment failure control parameters in this application include, but are not limited to, those listed above. For specific details, please refer to existing or newly added connection establishment failure control parameters. Existing connection establishment failure control parameters can be those already included in existing versions of communication standards, such as those included in SIB1 communication standards. Newly added connection establishment failure control parameters can be newly defined parameters, such as those in future communication standards.

[0139] V. System Message Scheduling Information. System message scheduling information, also known as system message scheduling related parameters (si-SchedulingInfo), includes at least one of the following: system message broadcast status (si-BroadStatus), system message period (si-periodicity), system message window length (si-WindowLength), and system message mapping information (si-Mappinginfo), etc.

[0140] The system information scheduling parameters in this application are not limited to those listed above. For specific details, please refer to existing or newly added system information scheduling parameters. Existing system information scheduling parameters may be those found in existing versions of communication standards, such as those included in SIB1 communication standards. Newly added system information scheduling parameters may be newly defined parameters, such as those in future communication standards.

[0141] VI. Emergency Service Support Information. Emergency service support information may include the Internet Protocol Multimedia Subsystem (IMS) Emergency Support logo, etc. Alternatively, emergency service support information can be described as the IMS Emergency Support logo.

[0142] 7. Emergency Call Support Information. Emergency call support information may include the IMS Emergency Call (ecallOver-IMS-Support) flag. Alternatively, emergency call support information can be described as the IMS Emergency Call flag.

[0143] VIII. Timer Configuration. Timer configuration, also known as timer and constant configuration, includes at least one of the following: Timer T300, Timer T301, Timer T310, Timer N310, Timer T311, Timer N311, or Timer T319, etc.

[0144] The timer and constant configurations in this application are not limited to those listed above. For specific details, please refer to existing or newly added timer and constant configurations. Existing timer and constant configurations may be those found in existing versions of communication standards, such as the timer and constant configurations included in the SIB1 communication standard. Newly added timer and constant configurations may be newly defined timer and constant configurations, such as those in future communication standards.

[0145] 9. Access Control Information. Access control information, also known as Unified Access Control Information (UAC-BarringInfo), includes access control prohibition factors and / or access control prohibition times, etc.

[0146] The unified access control information in this application includes, but is not limited to, the contents listed above. For specific details, please refer to existing or newly added unified access control information. Existing unified access control information may be unified access control information in existing versions of communication standards, such as the unified access control information included in SIB1 communication standards. Newly added unified access control information may be newly defined unified access control information, such as unified access control information in future communication standards.

[0147] 10. Connection recovery-related identification information. For example, a full recovery identifier (useFullResumeID) can be used.

[0148] In summary, when the name of the first broadcast message is SIB1, the first broadcast message does not include some or all of the parameters from an existing SIB1, which will not be listed here. The existing SIB1 can be a version of SIB1 in the existing communication standard. That is to say, the name of the first broadcast message can be SIB1, but it does not include some or all of the parameters from the original SIB1.

[0149] In one possible implementation, when the name of the first broadcast message is MIB (i.e., the third case described above), the first broadcast message does not include one or more of the following (for example, it does not include all of the following, or some of the following information, or one of the following information): configuration information of the control resource set, configuration information of the search space, system frame number, subcarrier spacing, or whether access is prohibited by the cell, etc. That is, when the name of the first broadcast message is MIB, the first broadcast message does not include some or all of the parameters in the existing MIB, which are not listed here. The existing MIB can be a MIB in an existing version of the communication standard. In other words, the name of the first broadcast message can be MIB, but it does not include some or all of the parameters in the original MIB.

[0150] The following is an introduction to the content related to the first instruction information mentioned above.

[0151] The first indication information is used to trigger the network device to switch from energy-saving mode to non-energy-saving mode, and can be replaced with other descriptions. For example, the first indication information is used to trigger the network device to switch from energy-saving mode to non-energy-saving mode in a first area; the first indication information is used to indicate the switch from energy-saving mode to non-energy-saving mode; the first indication information is used to indicate the switch from energy-saving mode to non-energy-saving mode in a first area; the first indication information is used to request the network device to switch from energy-saving mode to non-energy-saving mode; the first indication information is used to request the network device to switch from energy-saving mode to non-energy-saving mode in a first area; the first indication information is used to indicate that the terminal has the ability to communicate with the network device in non-energy-saving mode; or the first indication information is used to indicate that the terminal has the ability to communicate with the network device in non-energy-saving mode in a first area, etc., and is not limited here. The first area may include the coverage area of ​​the beam corresponding to the first SSB. For example, the first area is the coverage area of ​​the beam corresponding to the first SSB. Alternatively, the first area may be a cell of the network device, and the coverage area of ​​the first area and the coverage area of ​​the beam corresponding to the first SSB partially or completely overlap.

[0152] In one possible implementation, since energy-saving mode and non-energy-saving mode are relative concepts, in this scheme, the first indication information used to trigger the network device to switch from energy-saving mode to non-energy-saving mode can also be replaced with: the first indication information used to trigger the network device to switch from non-energy-saving mode to energy-saving mode. In this case, the relevant definitions of energy-saving mode and non-energy-saving mode need to be interchanged. For example, the main function of SIB1 in energy-saving mode is to complete the configuration of the main cell, so that terminals in idle state can monitor paging messages or terminals in idle state can complete uplink timed synchronization through random access, thereby entering the connected state. SIB1 in non-energy-saving mode includes resources for sending corresponding indication information (which is used to trigger the network device to switch from energy-saving mode to non-energy-saving mode). That is to say, compared with the broadcast message in energy-saving mode, the broadcast message in non-energy-saving mode includes less information, etc.

[0153] The following describes the 'contents related to the second SSB' in conjunction with any one of the above-described embodiments 1 to 3.

[0154] In one possible implementation, the first SSB and the second SSB can be the same SSB or different SSBs. For example, when or after the network device enters a non-energy-saving mode, it retransmits multiple SSBs. Accordingly, the terminal can receive multiple SSBs, thus using the SSB with the highest energy among them as the second SSB. If the channel between the terminal and the network device remains unchanged, such as when the terminal does not move, then the SSB with the highest energy among the multiple SSBs from the network device in energy-saving mode is the same as the SSB with the highest energy among the multiple SSBs from the network device in non-energy-saving mode; that is, the first SSB and the second SSB are the same SSB. Conversely, if the channel between the terminal and the network device changes, such as when the terminal moves, then the SSB with the highest energy among the multiple SSBs from the network device in energy-saving mode may be different from the SSB with the highest energy among the multiple SSBs from the network device in non-energy-saving mode; that is, the first SSB and the second SSB are different SSBs.

[0155] In one possible implementation, the second SSB is used to acquire the second broadcast message, which can be understood as at least one of the following cases, specifically:

[0156] In the first scenario, the second broadcast message is scheduled by the second control information, which is carried on the resources corresponding to the second search space and / or the second control resource set. The second search space and / or the second control resource set is indicated by the second SSB. That is, the second SSB here is similar to the SSB in Embodiment 1 above, and will not be described in detail here. In this case, the second broadcast message can be called SIB1 or other broadcast messages, and its specific naming does not limit the scope of protection of this application.

[0157] In the second scenario, the second broadcast message is scheduled by the second control information, which is contained in the second SSB. That is, the second SSB here is similar to the SSB in embodiment 2 described above, and will not be elaborated further. In this case, the second broadcast message can be called SIB1 or other broadcast messages, and its specific naming does not limit the scope of protection of this application.

[0158] In one possible implementation, the second SSB in the first or second scenario described above is further used to indicate that the second broadcast message is a broadcast message in a non-energy-saving mode. Alternatively, the second control information in the first or second scenario described above is further used to indicate that the second broadcast message is a broadcast message in a non-energy-saving mode. For the former, the second broadcast message being a broadcast message in a non-energy-saving mode can be indicated by different values ​​of the second SSB, by different values ​​of some bits in the second SSB, by different values ​​of at least one field in the second SSB, or by different values ​​of some bits of at least one field in the second SSB. For the latter, the second broadcast message being a broadcast message in a non-energy-saving mode can be indicated by different values ​​of the second control information, by different values ​​of some bits in the second control information, by different values ​​of at least one field in the second control information, or by different values ​​of some bits of at least one field in the second control information.

[0159] For example, consider a 1-bit indication in the second SSB or second control information that the second broadcast message is a broadcast message in non-energy-saving mode. A 1-bit value of '1' indicates that the second broadcast message is a broadcast message in non-energy-saving mode. A 1-bit value of '0' indicates that the second broadcast message is not a broadcast message in non-energy-saving mode. Alternatively, a 1-bit value of '0' indicates that the second broadcast message is a broadcast message in non-energy-saving mode. A 1-bit value indicates that the second broadcast message is not a broadcast message in non-energy-saving mode. In one possible implementation, the second broadcast message not being a broadcast message in non-energy-saving mode is also described as: the second broadcast message is a broadcast message in energy-saving mode.

[0160] The following is a description of the relevant content of the aforementioned second broadcast message.

[0161] In one possible implementation, the content included in the first broadcast message differs from the content included in the second broadcast message. For example, when the name of the first broadcast message is SIB1, the first broadcast message does not include some or all of the parameters in an existing SIB1 (such as an existing version of SIB1 in a communication standard), while the second broadcast message includes some or all of the parameters in an existing SIB1. Alternatively, when the name of the first broadcast message is MIB, the first broadcast message does not include some or all of the parameters in an existing MIB (such as an existing version of MIB in a communication standard), while the second broadcast message includes some or all of the parameters in an existing SIB1.

[0162] For example, the second broadcast message may include a random access common configuration, which indicates a second resource used for random access. The contents of the random access common configuration can be found in the relevant descriptions above and will not be repeated here. Of course, the second broadcast message may also include other configurations besides the random access common configuration; for details, please refer to the parameter configurations included in existing SIB1 (such as those in existing versions of communication standards), which will not be listed here.

[0163] In one possible implementation, the resource configuration in the first broadcast message differs from the random access common configuration in the second broadcast message. In other words, the resources configured in the resource configuration (i.e., the first resource) and the resources configured in the random access common configuration (i.e., the second resource) do not overlap. For example, the first resource and the second resource are non-overlapping resources within the same period. Alternatively, the first random access channel transmission opportunity (RACH occasion, RO) after the Nth time unit can be used as the first resource, and all other ROs except the first RO can be used as the second resource. The Nth time unit is located in the time domain after the resource in the broadcast message of the power-saving mode, where N is a positive integer. The time unit mentioned in this application refers to a duration in the time domain (or time length, or simply duration), such as at least one frame, at least one subframe, at least one time slot, at least one symbol, at least one segment, at least one mini-slot or sub-slot, or other time-domain granularities, etc., which are not limited in this application.

[0164] In one possible implementation, to ensure that the terminal and network device have a consistent understanding of the preamble on the corresponding RO and to improve the success rate of the terminal performing random access, this application may adopt at least one of the following methods, specifically:

[0165] Method 1: The aforementioned second broadcast message also includes a first bitmap, where multiple bits in the first bitmap correspond to multiple SSBs with different indices. For example, multiple bits in the first bitmap may correspond to multiple SSBs with different indices in ascending order of their indices, or multiple bits in the first bitmap may correspond to multiple SSBs with different indices in descending order of their indices, or multiple bits in the first bitmap may correspond to multiple SSBs with different indices in descending order of their indices, or multiple bits in the first bitmap may correspond to multiple SSBs with different indices in descending order of their indices, or multiple bits in the first bitmap may correspond to multiple SSBs with different indices in descending order of their indices, or multiple bits in the first bitmap may correspond to multiple SSBs with different indices in descending order of their indices. This application does not limit this to any particular method.

[0166] In this first bit diagram, a bit with a first value indicates that the corresponding SSB in the non-energy-saving mode has been sent or transmitted, and a bit with a second value indicates that the corresponding SSB in the energy-saving mode has not been sent or transmitted. In one possible implementation, the first value is 1 and the second value is 0. Alternatively, the first value is 0 and the second value is 1.

[0167] Method 2: The terminal can also obtain second indication information, which includes a second bitmap, where multiple bits in the second bitmap correspond to multiple SSBs with different indices. For example, multiple bits in the second bitmap may correspond to multiple SSBs with different indices in ascending order of their indices, or multiple bits in the second bitmap may correspond to multiple SSBs with different indices in descending order of their indices, or multiple bits in the second bitmap may correspond to multiple SSBs with different indices in descending order of their indices, or multiple bits in the second bitmap may correspond to multiple SSBs with different indices in descending order of their indices, or multiple bits in the second bitmap may correspond to multiple SSBs with different indices in descending order of their indices, or multiple bits in the second bitmap may correspond to multiple SSBs with different indices in descending order of their indices. This application does not limit this to any particular method.

[0168] In this configuration, a bit in the second bitmap with a third value indicates that the corresponding SSB is in non-energy-saving mode, while a bit in the second bitmap with a fourth value indicates that the corresponding SSB is in energy-saving mode. In one possible implementation, the third value is 1 and the fourth value is 0. Alternatively, the third value is 0 and the fourth value is 1.

[0169] In one possible implementation, the second indication information can be indicated to the terminal by the network device directly or indirectly, or it can be predefined. For example, the second indication information can be carried in radio resource control (RRC) signaling, downlink control information (DCI), media access control-control element (MAC CE) or other signaling, and this application does not limit this.

[0170] S302, The terminal sends the first instruction information on the first resource.

[0171] Accordingly, the network device receives the first instruction information on the first resource.

[0172] In one possible implementation, step S303 may also be performed after step S302.

[0173] S303, The network device sends a second broadcast message.

[0174] Accordingly, the terminal receives the second broadcast message.

[0175] As can be seen, in the above embodiments, the terminal can obtain the first broadcast message through the first SSB, and then send the first indication information through the first resource indicated by the first broadcast message to trigger the network device to switch from power-saving mode to non-power-saving mode. That is, the first broadcast message is a broadcast message in power-saving mode, meaning the network device sends the first broadcast message in power-saving mode. On one hand, this is beneficial for network device energy saving. On the other hand, the number of resources indicated by the first broadcast message is less than the number indicated by the second broadcast message. For example, the network device does not know which cell the terminal device might be randomly accessing, so the resources indicated by the second broadcast message may include resources for random access in different cells, resulting in a larger number of resources indicated by the second broadcast message. Therefore, indicating resources through the first broadcast message can reduce resource indication overhead. For example, if the first broadcast message is sent in an area with little or no business demand, the number of resources indicated by the first broadcast message is small, which can reduce resource waste. It can also enable terminal devices entering the area to trigger the network device to switch from energy-saving mode to non-energy-saving mode through the first indication information, so as to achieve random access through the second broadcast message. This ensures that terminal devices in the area can still communicate with the network device and reduces the occurrence of signal coverage gaps.

[0176] Optionally, to achieve the aforementioned functions, the device includes corresponding hardware structures and / or software modules for performing each function. Those skilled in the art will readily recognize that, based on the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0177] This application embodiment can divide the terminal or network device into functional modules according to the above method examples. For example, each function can be divided into its own functional modules, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware or as a software functional module. It should be noted that the module division in this application embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods.

[0178] See Figure 6 , Figure 6 This is a schematic diagram of a communication device provided in an embodiment of this application. The communication device 600 can be applied to the above-described... Figure 3 In the method shown in the embodiment, as Figure 6 As shown, the communication device 600 includes a processing module 601 and a transceiver module 602. The processing module 601 may be one or more processors, and the transceiver module 602 may be a transceiver or a communication interface. This communication device can be used to implement the terminal or network device involved in any of the above method embodiments, or to implement the functions of the network element involved in any of the above method embodiments. The network element or network function can be a network component in a hardware device, a software function running on dedicated hardware, or a virtualization function instantiated on a platform (e.g., a cloud platform). Optionally, the communication device 600 may also include a storage module 603 for storing the program code and data of the communication device 600. It should be understood that regardless of whether these functional modules are subdivided or combined, the general flow performed by the communication device 600 in implementing any of the above method embodiments is the same. For example, the transceiver module 602 in the above communication device 600 may include a receiving module and / or a sending module; of course, the transceiver module may also be called a communication module. In one implementation, each module can have its own program code (or program instructions). When these program codes are run on the processor, they enable the unit to execute the corresponding process and thus achieve the corresponding function.

[0179] In one example, when the communication device functions as a terminal or is a chip used in a terminal, i.e., a chip for a terminal, it executes the steps performed by the terminal in the above method embodiments. The transceiver module 602 is used for specific execution. Figure 3 The actions of sending and / or receiving performed by the terminal in the illustrated embodiments may include, for example, other processes that support the terminal in performing the techniques described herein. The processing module 601 may be used to support the communication device 600 in performing the processing actions in the above method embodiments, for example, supporting the terminal in performing other processes that support the techniques described herein.

[0180] For example, transceiver module 602 is used to receive a first SSB, the first SSB is used to obtain a first broadcast message, the first broadcast message indicates a first resource for sending first indication information, the first indication information is used to trigger the network device to switch from power saving mode to non-power saving mode, in non-power saving mode a second SSB from the network device is used to obtain a second broadcast message, the second broadcast message indicates a second resource for random access; transceiver module 602 is also used to send the first indication information on the first resource.

[0181] In one possible implementation, the transceiver module 602 is further configured to receive a second broadcast message, which is scheduled by second control information. The second control information is carried on resources corresponding to a second search space and / or a second control resource set, and the second search space and / or the second control resource set is indicated by a second SSB. The second control information or the second SSB is also used to indicate that the second broadcast message is a broadcast message in a non-energy-saving mode.

[0182] In one possible implementation, the transceiver module 602 is further configured to receive second indication information, the second indication information including a second bit map, wherein multiple bits in the second bit map correspond to multiple SSBs with different indices, wherein a third value in the second bit map indicates an SSB in non-energy-saving mode, and a fourth value in the second bit map indicates an SSB in energy-saving mode.

[0183] In one example, when the communication device functions as a network device or is a chip used in a network device (i.e., a chip used in a network device), it executes the steps performed by the network device in the above method embodiments. The transceiver module 602 is used for specific execution. Figure 3 The actions of sending and / or receiving performed by the network device in the illustrated embodiments may include, for example, other processes that support the network device in performing the techniques described herein. The processing module 601 may be used to support the communication device 600 in performing the processing actions in the above method embodiments, for example, to support the network device in performing other processes that support the techniques described herein.

[0184] For example, transceiver module 602 is used to send a first SSB, the first SSB is used to obtain a first broadcast message, the first broadcast message indicates a first resource for sending first indication information, the first indication information is used to trigger the network device to switch from power saving mode to non-power saving mode, in non-power saving mode a second SSB from the network device is used to obtain a second broadcast message, the second broadcast message indicates a second resource for random access; transceiver module 602 is also used to receive the first indication information on the first resource.

[0185] In one possible implementation, the transceiver module 602 is further configured to send a second broadcast message, which is scheduled by second control information. The second control information is carried on resources corresponding to a second search space and / or a second control resource set, and the second search space and / or the second control resource set is indicated by a second SSB. The second control information or the second SSB is also used to indicate that the second broadcast message is a broadcast message in a non-energy-saving mode.

[0186] In one possible implementation, the transceiver module 602 is further configured to send second indication information, the second indication information including a second bit map, wherein multiple bits in the second bit map correspond to multiple SSBs with different indices, wherein a third value in the second bit map indicates an SSB in non-energy-saving mode, and a fourth value in the second bit map indicates an SSB in energy-saving mode.

[0187] In one possible implementation, when the aforementioned device is a chip, such as a modem chip or a SoC chip or SIP chip containing a modem core, or when the aforementioned device is a communication module, the transceiver module 602 can be a communication interface, pins, or circuits. The communication interface can be used to input data to be processed to the processor and can output the processor's processing results. In a specific implementation, the communication interface can be a general purpose input / output (GPIO) interface, which can connect to multiple peripheral devices (such as a liquid crystal display (LCD), camera, radio frequency (RF) module, antenna, etc.). The communication interface is connected to the processor via a bus.

[0188] The processing module 601 may be a processing circuit, which may be one or more processors, or all or part of the circuitry within one or more processors used for control and / or processing. The processing circuit or processor may execute computer-executable instructions stored in the storage module to cause the chip to perform... Figure 3The method involved in the illustrated embodiment. Further, the processor may include a controller, an arithmetic logic unit (ALU), and registers. Exemplarily, the controller is primarily responsible for instruction decoding and issuing control signals for the operations corresponding to the instructions. The ALU is primarily responsible for performing fixed-point or floating-point arithmetic operations, shift operations, and logical operations, and can also perform address operations and translations. Registers are primarily responsible for storing register operands and intermediate operation results temporarily stored during instruction execution. In specific implementations, the processor's hardware architecture can be an application-specific integrated circuit (ASIC) architecture, a microprocessor without interlocked piped stages architecture (MIPS) architecture, an advanced reduced instruction set machine (RISC) machine (ARM) architecture, or a network processor (NP) architecture, etc. The processor can be single-core or multi-core. The storage module can be an in-chip storage module, such as registers or caches. Storage modules can also be external to the chip, such as read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), etc.

[0189] Optionally, the functions of the processor and interface can be implemented through hardware design, software design, or a combination of hardware and software; no restrictions are imposed here.

[0190] Figure 7 This is a schematic diagram of another communication device provided in an embodiment of this application. It is understood that the communication device 710 includes necessary means such as modules, units, elements, circuits, or interfaces, appropriately configured together to execute this solution. The communication device 710 can be the aforementioned terminal or network device, or a component (e.g., a chip) within these devices, used to implement the methods described in the above method embodiments. The communication device 710 includes one or more processors 711. The processor 711 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, while the central processing unit can be used to control the communication device (e.g., a terminal, network device, or chip), execute software programs, and process data from the software programs.

[0191] Optionally, in one design, the processor 711 may include a program 713 (sometimes also referred to as code or instructions), which can be executed on the processor 711 to cause the communication device 710 to perform the methods described in the above embodiments. In yet another possible design, the communication device 710 includes circuitry (…). Figure 7 (Not shown), the circuit is used to implement the functions of the terminal, network device, etc. in the above embodiments. Optionally, the communication device 710 may include one or more memories 712, on which a program 714 (sometimes also referred to as code or instructions) is stored. The program 714 can be run on the memory 712, causing the communication device 710 to perform the methods described in the above method embodiments.

[0192] Optionally, data may also be stored in the processor 711 and / or the memory 712. The processor and memory may be configured separately or integrated together.

[0193] Optionally, if the communication device 710 is a terminal or network device, it may also include a transceiver 715 and / or an antenna 716. The processor 711, sometimes referred to as a processing unit, controls the communication device (e.g., a terminal or network device). The transceiver 715, sometimes referred to as a transceiver unit, transceiver, or transceiver circuit, is used to implement the transmission and reception functions of the communication device via the antenna 716. Optionally, the transceiver 715 may include a receiver and / or a transmitter. The receiver may be referred to as a receiving unit, receiver, or receiving circuit. The transmitter may be referred to as a transmitting unit, transmitter, or transmitting circuit.

[0194] Optionally, if the communication device 710 is a chip for a terminal or network device, the transceiver 715 can be a transceiver circuit, such as an input / output interface or a transceiver interface.

[0195] This application also provides a communication device, which includes at least one processor; wherein the at least one processor is configured to execute... Figure 3 The method described in any of the illustrated embodiments.

[0196] This application also provides a computer-readable storage medium storing computer instructions, which, when executed, cause the computer to perform actions such as... Figure 3 The method described in any of the illustrated embodiments.

[0197] This application also provides a computer program product, which includes: computer program code, which, when executed by a computer, causes the computer to perform actions such as... Figure 3 The method described in any of the illustrated embodiments.

[0198] This application embodiment also provides a chip, which includes at least one processor and an interface. The processor is used to read and execute instructions stored in a memory. When the instructions are executed, the chip causes the chip to perform actions such as... Figure 3 The method described in any of the illustrated embodiments.

[0199] Optionally, the processing performed by a single execution entity (terminal or network device) shown in any of the above embodiments can also be divided into multiple execution entities, which can be logically and / or physically separated. For example, the processing performed by the network device can be divided into execution by at least one of CU, DU, and RU.

[0200] Furthermore, the various embodiments of this application are merely illustrative examples of executing all the steps included, and should not be considered as specific limitations on this application. For example, the order of steps in various embodiments can be simply changed according to their function and internal logic; or, for example, all steps in various embodiments can be executed, or only a portion of them can be executed, as long as the same function as in the embodiments of this application can be achieved.

[0201] In this application, "send" and "receive" indicate the direction of signal transmission. For example, "send information to a network device" can be understood as the destination of the information being the network device, which can include direct transmission via the air interface or indirect transmission via the air interface from other units or modules. "Receive information from a network device" can be understood as the source of the information being the network device, which can include direct reception from the network device via the air interface or indirect reception from the network device via the air interface from other units or modules. "Send" can also be understood as the "output" of the chip interface, and "receive" can also be understood as the "input" of the chip interface.

[0202] In other words, sending and receiving can occur between devices, such as between network devices and terminals; or they can occur within a device, such as between components, modules, chips, software modules, or hardware modules within a device via a bus, wiring, or interface.

[0203] In the embodiments of this application, "when," "if," "if," and "in the case of" all refer to the device making corresponding processing under certain objective circumstances, and are not limited to a time, nor do they require the device to make a judgment action when it is implemented, nor do they mean that there are other limitations.

[0204] In this application, the words “example,” “exemplarily,” “for example,” or “such as” are used to indicate that something is an example, illustration, or description. Any embodiment or design described as “example,” “exemplarily,” “for example,” or “such as” in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the words “example,” “exemplarily,” “for example,” or “such as” is intended to present the relevant concepts in a specific manner.

[0205] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A communication method applied to a terminal device, characterized in that, include: A first synchronization signal block (SSB) is received. The first SSB is used to acquire a first broadcast message. The first broadcast message indicates a first resource for sending first indication information. The first indication information is used to trigger the network device to switch from power saving mode to non-power saving mode. In the non-power saving mode, a second SSB from the network device is used to acquire a second broadcast message. The second broadcast message indicates a second resource for random access. Send the first instruction information on the first resource.

2. A communication method applied to a network device, characterized in that, include: A first synchronization signal block (SSB) is sent, the first SSB is used to acquire a first broadcast message, the first broadcast message indicates a first resource for sending first indication information, the first indication information is used to trigger the network device to switch from power saving mode to non-power saving mode, wherein, in the non-power saving mode, a second SSB from the network device is used to acquire a second broadcast message, the second broadcast message indicates a second resource for random access. Receive the first instruction information on the first resource.

3. The method according to claim 1 or 2, characterized in that, The first SSB is used to acquire the first broadcast message, including: The first broadcast message is scheduled by first control information, which is carried on resources corresponding to the first search space and / or the first control resource set, and the first search space and / or the first control resource set is indicated by the first SSB; or, The first broadcast message is scheduled by the first control information, which is contained in the first SSB.

4. The method according to claim 3, characterized in that, The first control information is also used to indicate that the first broadcast message is a broadcast message in the energy-saving mode.

5. The method according to claim 1 or 2, characterized in that, The first SSB is used to acquire the first broadcast message, including: The first broadcast message is contained in the first SSB.

6. The method according to claim 3 or 5, characterized in that, The first SSB is also used to indicate that the first broadcast message is a broadcast message in the energy-saving mode.

7. The method according to any one of claims 1 or 3-6, characterized in that, The method further includes: Receive the second broadcast message, the second broadcast message is scheduled by the second control information, the second control information is carried on the resources corresponding to the second search space and / or the second control resource set, and the second search space and / or the second control resource set is indicated by the second SSB; The second control information or the second SSB is further used to indicate that the second broadcast message is a broadcast message in the non-energy-saving mode.

8. The method according to any one of claims 2 or 3-6, characterized in that, The method further includes: Send the second broadcast message, which is scheduled by the second control information. The second control information is carried on the resources corresponding to the second search space and / or the second control resource set. The second search space and / or the second control resource set is indicated by the second SSB. The second control information or the second SSB is further used to indicate that the second broadcast message is a broadcast message in the non-energy-saving mode.

9. The method according to any one of claims 1-8, characterized in that, The second broadcast message includes a first bitmap, in which multiple bits correspond to multiple SSBs with different indices. A bit in the first bitmap with a first value indicates that the corresponding SSB in the non-energy-saving mode has been sent, and a bit in the first bitmap with a second value indicates that the corresponding SSB in the energy-saving mode has not been sent.

10. The method according to any one of claims 1 or 3-7, characterized in that, The method further includes: Receive second indication information, the second indication information includes a second bit map, multiple bits in the second bit map correspond to multiple SSBs with different indices, wherein a bit in the second bit map with a third value indicates that the corresponding SSB is an SSB in the non-energy-saving mode, and a bit in the second bit map with a fourth value indicates that the corresponding SSB is an SSB in the energy-saving mode.

11. The method according to any one of claims 2, 3-6 or 8, characterized in that, The method further includes: Send a second indication message, which includes a second bit map. Multiple bits in the second bit map correspond to multiple SSBs with different indices. Specifically, a bit in the second bit map with a third value indicates that the corresponding SSB is an SSB in the non-energy-saving mode, and a bit in the second bit map with a fourth value indicates that the corresponding SSB is an SSB in the energy-saving mode.

12. The method according to any one of claims 9-11, characterized in that, The SSB in the energy-saving mode and the SSB in the non-energy-saving mode are respectively carried on different resources corresponding to the same search space.

13. The method according to any one of claims 1-12, characterized in that, The first broadcast message does not include one or more of the following: public configuration information, information for cell selection, information for cell access, control information related to connection establishment failure, scheduling information of system messages, emergency service support information, emergency call support information, timer configuration, access control information, or identification information related to connection recovery.

14. The method according to any one of claims 1-13, characterized in that, The first broadcast message does not include one or more of the following: configuration information of the control resource set, configuration information of the search space, system frame number, subcarrier spacing, or whether access to the cell is prohibited.

15. The method according to any one of claims 1-14, characterized in that, The first broadcast message also includes ephemeris information of the network device.

16. A communication device, characterized in that, The communication device includes a transceiver module; The transceiver module is used to receive a first synchronization signal block (SSB), the first SSB is used to acquire a first broadcast message, the first broadcast message indicates a first resource for sending first indication information, the first indication information is used to trigger the network device to switch from power saving mode to non-power saving mode, wherein, in the non-power saving mode, a second SSB from the network device is used to acquire a second broadcast message, the second broadcast message indicates a second resource for random access. The transceiver module is also used to send the first indication information on the first resource.

17. A communication device, characterized in that, The communication device includes a transceiver module; The transceiver module is used to send a first synchronization signal block (SSB), the first SSB is used to acquire a first broadcast message, the first broadcast message indicates a first resource for sending first indication information, the first indication information is used to trigger the network device to switch from power saving mode to non-power saving mode, wherein, in the non-power saving mode, a second SSB from the network device is used to acquire a second broadcast message, the second broadcast message indicates a second resource for random access. The transceiver module is further configured to receive the first indication information on the first resource.

18. The apparatus according to claim 16 or 17, characterized in that, The first SSB is used to acquire the first broadcast message, including: The first broadcast message is scheduled by first control information, which is carried on resources corresponding to the first search space and / or the first control resource set, and the first search space and / or the first control resource set is indicated by the first SSB; or, The first broadcast message is scheduled by the first control information, which is contained in the first SSB.

19. The apparatus according to claim 18, characterized in that, The first control information is also used to indicate that the first broadcast message is a broadcast message in the energy-saving mode.

20. The apparatus according to claim 16 or 17, characterized in that, The first SSB is used to acquire the first broadcast message, including: The first broadcast message is contained in the first SSB.

21. The apparatus according to claim 18 or 20, characterized in that, The first SSB is also used to indicate that the first broadcast message is a broadcast message in the energy-saving mode.

22. The apparatus according to any one of claims 16 or 18-21, characterized in that, The transceiver module is further configured to receive the second broadcast message, which is scheduled by the second control information. The second control information is carried on the resources corresponding to the second search space and / or the second control resource set, which is indicated by the second SSB. The second control information or the second SSB is further used to indicate that the second broadcast message is a broadcast message in the non-energy-saving mode.

23. The apparatus according to any one of claims 17 or 18-21, characterized in that, The transceiver module is further configured to send the second broadcast message, which is scheduled by the second control information. The second control information is carried on the resources corresponding to the second search space and / or the second control resource set, which is indicated by the second SSB. The second control information or the second SSB is further used to indicate that the second broadcast message is a broadcast message in the non-energy-saving mode.

24. The apparatus according to any one of claims 16-23, characterized in that, The second broadcast message includes a first bitmap, in which multiple bits correspond to multiple SSBs with different indices. A bit in the first bitmap with a first value indicates that the corresponding SSB in the non-energy-saving mode has been sent, and a bit in the first bitmap with a second value indicates that the corresponding SSB in the energy-saving mode has not been sent.

25. The apparatus according to any one of claims 16 or 18-22, characterized in that, The transceiver module is further configured to receive second indication information, the second indication information including a second bit map, wherein multiple bits in the second bit map correspond to multiple SSBs with different indices, wherein a third value in a bit in the second bit map indicates that the corresponding SSB is an SSB in the non-energy-saving mode, and a fourth value in a bit in the second bit map indicates that the corresponding SSB is an SSB in the energy-saving mode.

26. The apparatus according to any one of claims 17, 18-21 or 23, characterized in that, The transceiver module is further configured to send second indication information, the second indication information including a second bit map, wherein multiple bits in the second bit map correspond to multiple SSBs with different indices, wherein a third value in a bit in the second bit map indicates that the corresponding SSB is an SSB in the non-energy-saving mode, and a fourth value in a bit in the second bit map indicates that the corresponding SSB is an SSB in the energy-saving mode.

27. The apparatus according to any one of claims 24-26, characterized in that, The SSB in the energy-saving mode and the SSB in the non-energy-saving mode are respectively carried on different resources corresponding to the same search space.

28. The apparatus according to any one of claims 16-27, characterized in that, The first broadcast message does not include one or more of the following: public configuration information, information for cell selection, information for cell access, control information related to connection establishment failure, scheduling information of system messages, emergency service support information, emergency call support information, timer configuration, access control information, or identification information related to connection recovery.

29. The apparatus according to any one of claims 16-28, characterized in that, The first broadcast message does not include one or more of the following: configuration information of the control resource set, configuration information of the search space, system frame number, subcarrier spacing, or whether access to the cell is prohibited.

30. The apparatus according to any one of claims 16-29, characterized in that, The first broadcast message also includes ephemeris information of the network device.

31. A communication device, characterized in that, The communication device includes at least one processor; wherein the at least one processor is configured to cause the communication device to perform the method of any one of claims 1, 3-7, 9, 10 or 12-15, or the at least one processor is configured to cause the communication device to perform the method of any one of claims 2, 3-6, 8, 9 or 11-15.

32. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions or programs that, when executed, cause the computer to perform the method as described in any one of claims 1, 3-7, 9, 10, or 12-15, or cause the computer to perform the method as described in any one of claims 2, 3-6, 8, 9, or 11-15.

33. A chip, characterized in that, The chip includes at least one processor, the processor being configured to execute computer instructions or programs that, when executed, cause the chip to perform the method as described in any one of claims 1, 3-7, 9, 10, or 12-15, or cause the chip to perform the method as described in any one of claims 2, 3-6, 8, 9, or 11-15.

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