Communication method, communication device and communication system

Abstract

The invention provides a communication method, a communication device and a communication system. When a plurality of transmission nodes sequentially provide services for the terminal equipment according to the time sequence, the terminal equipment transmits information with each transmission node by using the same transmission resource in different time periods, and the accessed transmission nodes do not need to be frequently switched, so that the signaling overhead can be reduced. And when data transmission is carried out with different transmission nodes, data transmission is carried out with the transmission nodes by using the time-frequency configuration information of the corresponding transmission nodes, so that normal transmission of information can be realized, and the correctness of information transmission is improved.

Description

Technical Field

[0001] This application relates to the field of wireless communication technologies, and in particular, to a communication method, a communication device, and a communication system. Background Art

[0002] The fifth-generation (5G) new radio (NR) has entered the commercial deployment stage from the standardization stage. The NR standard is designed for terrestrial communication characteristics and features providing users with high-speed, highly reliable, and low-latency communication. Compared with terrestrial communication, non-terrestrial network (NTN) communication has characteristics such as a large coverage area and flexible networking. Currently, various research institutes, communication organizations, companies, etc. are all involved in the research of NTN communication technologies and standards, aiming to build a unified communication network for sky, air, and ground communications.

[0003] NTN communication includes networking using devices such as unmanned aerial vehicles, high altitude platform station (HAPS) devices, and satellites to provide services such as data transmission and voice communication for terminal devices.

[0004] Currently, the communication of NTN devices has the following problems to be solved:

[0005] First, the high-speed movement of NTN devices causes changes in the relative positions between terminal devices and NTN devices, resulting in terminal devices frequently switching the NTN devices to which they are connected. Terminal devices need to switch the transmission resources for communication, causing a large signaling overhead.

[0006] Second, the time-frequency position differences of the beams of different NTN devices arriving at terminal devices are relatively large. After a terminal device switches to a new NTN device, it cannot correctly transmit information. Summary of the Invention

[0007] Embodiments of this application provide a communication method, a communication device, and a communication system for reducing the signaling overhead of terminal devices and enabling the correct transmission of information.

[0008] In a first aspect, embodiments of this application provide a communication method, which can be executed by a terminal device or a module (such as a chip) in the terminal device. The method includes: transmitting information on the first transmission resource according to the time-frequency configuration information of the first transmission node corresponding to the first transmission resource in a first time period; transmitting information on the first transmission resource according to the time-frequency configuration information of the second transmission node corresponding to the first transmission resource in a second time period.

[0009] In the above solution, when multiple transmission nodes provide services to a terminal device in sequence according to time sequence, the terminal device uses the same transmission resources to transmit information with each transmission node in different time periods, and does not need to frequently switch the accessed transmission nodes, so the signaling overhead can be reduced. And when transmitting data with different transmission nodes, the time-frequency configuration information of the corresponding transmission node is used to transmit data with the transmission node, so the normal transmission of information can be realized and the correctness of information transmission can be improved.

[0010] In a possible implementation method, the first transmission resource includes one or more of the following resources: synchronization signal / physical broadcast channel block (SSB) resource, SSB resource set, SSB resource set list, reference signal resource, reference signal resource set, reference signal resource set list, random access channel occasion (RO) resource, RO resource set or RO resource set list.

[0011] In a possible implementation method, the time-frequency configuration information of the first transmission node includes one or more of the following information: ephemeris information of the first transmission node, downlink frequency pre-compensation information of the first transmission node, uplink frequency post-compensation information of the first transmission node or timing compensation information of the first transmission node.

[0012] In a possible implementation method, the time-frequency configuration information of the second transmission node includes one or more of the following information: ephemeris information of the second transmission node, downlink frequency pre-compensation information of the second transmission node, uplink frequency post-compensation information of the second transmission node or timing compensation information of the second transmission node.

[0013] In a possible implementation method, the method further includes: receiving configuration information from the first transmission node, where the configuration information includes the time-frequency configuration information of the second transmission node corresponding to the first transmission resource and the effective time of the time-frequency configuration information of the second transmission node; the transmitting information on the first transmission resource according to the time-frequency configuration information of the second transmission node corresponding to the first transmission resource in the second time period includes: after the effective time arrives, transmitting information on the first transmission resource according to the time-frequency configuration information of the second transmission node in the second time period.

[0014] In the above solution, dynamically indicating the time-frequency configuration information to be used can realize flexible configuration of the time-frequency configuration information.

[0015] In a possible implementation method, the method further includes: receiving indication information from the first transmission node, where the indication information is used to indicate the time-frequency configuration information of the second transmission node in a pre-configured set of time-frequency configurations and the effective time of the time-frequency configuration information of the second transmission node; and transmitting information on the first transmission resource according to the time-frequency configuration information of the second transmission node corresponding to the first transmission resource in a second time period, including: after the effective time arrives, obtaining the time-frequency configuration information of the second transmission node from the set of time-frequency configurations, and transmitting information on the first transmission resource according to the time-frequency configuration information of the second transmission node in the second time period.

[0016] In the above solution, by pre-configuring a set of time-frequency configurations and then using dynamic signaling to indicate the time-frequency configuration information of the transmission node in the set of time-frequency configurations that will be used in the future, flexible configuration of the time-frequency configuration information can be achieved, and signaling overhead in the dynamic configuration process can be reduced.

[0017] In a possible implementation method, transmitting information on the first transmission resource according to the time-frequency configuration information of the second transmission node corresponding to the first transmission resource in a second time period includes: after the pre-configured effective time of the time-frequency configuration information of the second transmission node arrives, obtaining the time-frequency configuration information of the second transmission node from the pre-configured set of time-frequency configurations, and transmitting information on the first transmission resource according to the time-frequency configuration information of the second transmission node in the second time period.

[0018] In the above solution, by pre-configuring a set of time-frequency configurations and the effective time of the time-frequency configuration information of each transmission node in the set of time-frequency configurations, when the effective time of the time-frequency configuration information of each transmission node arrives later, the terminal device can use the time-frequency configuration information of the corresponding transmission node, so that flexible configuration of the time-frequency configuration information can be achieved, and signaling overhead is reduced. Moreover, this solution can also enable configuration modification of non-connected terminal devices.

[0019] In a possible implementation method, transmitting information on the first transmission resource according to the time-frequency configuration information of the second transmission node corresponding to the first transmission resource in a second time period includes: when the reference signal receiving power (RSRP) of the reference signal associated with the time-frequency configuration information of the second transmission node is greater than a preset threshold, obtaining the time-frequency configuration information of the second transmission node from the pre-configured set of time-frequency configurations, and transmitting information on the first transmission resource according to the time-frequency configuration information of the second transmission node in the second time period.

[0020] In the above solution, by pre-configuring the time-frequency configuration set and the activation conditions of the time-frequency configuration information of each transmission node in the time-frequency configuration set, when the activation conditions of the time-frequency configuration information of each transmission node are met by the subsequent terminal device, the time-frequency configuration information of the corresponding transmission node is used, so that flexible configuration of the time-frequency configuration information can be achieved, and signaling overhead is reduced. Moreover, this solution can also enable configuration modification of non-connected terminal devices.

[0021] In a second aspect, an embodiment of the present application provides a communication method, which can be executed by a first transmission node or a module (such as a chip) in the first transmission node. The method includes: receiving the time-frequency configuration information of the second transmission node and the service time period of the second transmission node from the second transmission node; sending the time-frequency configuration information of the second transmission node and the service time period of the second transmission node to the terminal device served by the first transmission node.

[0022] In the above solution, the time-frequency configuration information and the service time period of the transmission node that will serve the terminal device next are pre-configured for the terminal device. Thus, after the service time period arrives, the terminal device can use the time-frequency configuration information of the corresponding transmission node to transmit information, so that normal transmission of information can be achieved and the correctness of information transmission can be improved.

[0023] In a possible implementation method, the method further includes: sending information on a first transmission resource and information on the service location corresponding to the first transmission resource to the second transmission node, where the first transmission resource is the resource used by the first transmission node to provide services.

[0024] In this solution, the first transmission node notifies the second transmission node in advance of the information on the first transmission resource and the information on the service location corresponding to the first transmission resource. Therefore, the second transmission node can also use the first transmission resource to communicate with the terminal device subsequently. Thus, the terminal device uses the same transmission resource to transmit information between each transmission node at different time periods and does not need to frequently switch the accessed transmission node, so that signaling overhead can be reduced.

[0025] In a possible implementation method, the method further includes: sending information on a first transmission resource and information on the terminal device to the second transmission node, where the first transmission resource is the resource used by the first transmission node to provide services for the terminal device.

[0026] In this solution, the first transmission node notifies the second transmission node in advance of the information on the first transmission resource and the information on the terminal device. Therefore, the second transmission node can also use the first transmission resource to communicate with the terminal device subsequently. As a result, the terminal device transmits information to and from each transmission node using the same transmission resource in different time periods, without the need to frequently switch the connected transmission node, thus reducing signaling overhead.

[0027] In a possible implementation, the first transmission resource includes one or more of the following resources: SSB resource, SSB resource set, SSB resource set list, reference signal resource, reference signal resource set, reference signal resource set list, RO resource, RO resource set, or RO resource set list.

[0028] In a possible implementation, the method further includes: sending to the second transmission node the time for service handover between the first transmission node and the second transmission node.

[0029] In a third aspect, an embodiment of the present application provides a communication device, which may be a terminal device or a module (such as a chip) in the terminal device. The device has the function of implementing any of the implementation methods in the first aspect above. This function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0030] In a fourth aspect, an embodiment of the present application provides a communication device, which may be a first transmission node or a module (such as a chip) in the first transmission node. The device has the function of implementing any of the implementation methods in the second aspect above. This function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0031] In a fifth aspect, an embodiment of the present application provides a communication device, including units or means for performing each step of any of the implementation methods in the first aspect to the second aspect above.

[0032] In a sixth aspect, an embodiment of the present application provides a communication device, including a processor and an interface circuit. The processor is used to communicate with other devices through the interface circuit and execute any of the implementation methods in the first aspect to the second aspect above. The processor includes one or more.

[0033] Optionally, the communication device may further include a memory for storing computer instructions. The memory is coupled to the processor, and the processor executes the computer instructions stored in the memory to enable the device to execute any of the implementation methods in the first aspect to the second aspect above.

[0034] In a seventh aspect, an embodiment of the present application further provides a computer program product, which includes a computer program or instruction. When the computer program or instruction is run on a communication device, any implementation method in the above first aspect to second aspect is executed.

[0035] In an eighth aspect, an embodiment of the present application further provides a computer-readable storage medium, in which instructions are stored. When it runs on a communication device, any implementation method in the above first aspect is executed.

[0036] In a ninth aspect, an embodiment of the present application further provides a chip system, including: a processor for executing any implementation method in the above first aspect to second aspect.

[0037] In a tenth aspect, an embodiment of the present application provides a communication system, including: a first transmission node for receiving the time-frequency configuration information of the second transmission node and the service time period of the second transmission node from the second transmission node; and sending the time-frequency configuration information of the second transmission node and the service time period of the second transmission node to a terminal device served by the first transmission node; the second transmission node for sending the time-frequency configuration information of the second transmission node and the service time period of the second transmission node to the first transmission node.

[0038] In a possible implementation method, the first transmission node is further configured to send information on a first transmission resource and information on a service location corresponding to the first transmission resource to the second transmission node, where the first transmission resource is a resource used by the first transmission node to provide services.

[0039] In a possible implementation method, the first transmission node is further configured to send information on a first transmission resource and information on the terminal device to the second transmission node, where the first transmission resource is a resource used by the first transmission node to provide services to the terminal device.

[0040] In a possible implementation method, the first transmission resource includes one or more of the following resources: SSB resource, SSB resource set, SSB resource set list, reference signal resource, reference signal resource set, reference signal resource set list, RO resource, RO resource set, or RO resource set list.

[0041] In a possible implementation method, the first transmission node is further configured to send the time for the first transmission node and the second transmission node to perform service handover to the second transmission node. Description of the Drawings

[0042] Fig. 1(a) is a schematic diagram of the network architecture of the transparent transmission mode in which NTN is integrated with the terrestrial network;

[0043] Figure 1(b) is a schematic diagram of the network architecture of the regeneration mode in which NTN is integrated with the terrestrial network;

[0044] Figure 2 It is a schematic flowchart of a communication method provided by an embodiment of the present application;

[0045] Figure 3 It is a schematic flowchart of a communication method provided by an embodiment of the present application;

[0046] Figure 4 It is a schematic diagram of the structure of a communication device provided by an embodiment of the present application;

[0047] Figure 5 It is a schematic diagram of the structure of a communication device provided by an embodiment of the present application. Detailed implementation manners

[0048] The fifth generation (5G) new radio (NR) has entered the commercial deployment stage from the standardization stage. The NR standard is studied and designed for the characteristics of terrestrial communication, and has the characteristics of providing high-speed, high-reliability, and low-latency communication for users. Compared with terrestrial communication, non-terrestrial network (NTN) communication has characteristics such as a large coverage area and flexible networking. Currently, various research institutes, communication organizations, companies, etc. are all participating in the research of NTN communication technologies and standards, and strive to build a unified communication network for sky, air, and ground communications.

[0049] NTN communication includes networking using devices such as drones, High Altitude Platform Stations (HAPS), and satellites to provide services such as data transmission and voice communication for terminal devices. The altitude of high-altitude platform devices is generally 8 to 50 kilometers (km) above the ground. According to the orbital altitude of satellites, satellite communication systems can be divided into the following three types: Geostationary Earth Orbit (GEO) satellite communication systems (also known as geosynchronous orbit satellite systems), Medium Earth Orbit (MEO) satellite communication systems, and Low Earth Orbit (LEO) satellite communication systems. The orbital altitude of GEO satellites is 35,786 km. Its main advantage is that it can remain stationary relative to the ground and provide a large coverage area. However, GEO satellite communication also has obvious disadvantages: 1) The GEO satellite orbit is far from the Earth, resulting in large free-space propagation losses, causing a tight communication link budget. To increase the transmit / receive gain, a satellite needs to be equipped with a large-aperture antenna; 2) The communication transmission delay is large, with a round-trip delay of about 500 milliseconds (ms), which cannot meet the requirements of real-time services; 3) GEO orbital resources are relatively scarce, the launch cost is high, and it cannot provide coverage for the polar regions of the Earth. The orbital altitude of MEO satellites is between 2,000 and 35,786 km. The advantage is that global coverage can be achieved with a relatively small number of satellites. However, its orbital altitude is higher than that of LEO, and the transmission delay is still larger compared to LEO satellite communication. Considering the advantages and disadvantages of MEO satellite communication, MEO satellites are mainly used for positioning and navigation. The orbital altitude of LEO satellites is in the range of 300 to 2,000 km. LEO satellites have a lower orbital altitude than MEO and GEO, and have the advantages of small data propagation delay, small transmission loss, and relatively low launch cost. Therefore, LEO satellite communication has also received extensive attention in recent years.

[0050] In the embodiments of the present application, the terminal device is a device with wireless transceiver functions, which can send signals and / or receive signals. The terminal device includes, but is not limited to, a terminal device, a terminal, a user equipment (UE), a mobile station, a mobile terminal, etc. The terminal device can be widely applied to various scenarios, such as device-to-device (D2D), vehicle to everything (V2X) communication, machine-type communication (MTC), Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, remote medical treatment, smart grid, smart furniture, smart office, smart wearables, smart transportation, smart city, etc. Specifically, the terminal device can be a mobile phone, a tablet computer, a computer with wireless transceiver functions, a wearable device, a vehicle, an airplane, a ship, a robot, a robotic arm, a smart home device, etc. The embodiments of the present application do not limit the specific technologies and specific device forms adopted by the terminal device.

[0051] The working modes of the NTN device include the transparent mode and the regenerative mode. Fig. 1(a) is a schematic diagram of the network architecture of the transparent mode in which the NTN is integrated with the terrestrial network. In this schematic diagram, the NTN device is taken as a satellite for example. In actual applications, the NTN device can also be a high-altitude platform device or a drone, etc. When the satellite operates in the transparent mode, the satellite has the function of relay forwarding. The gateway (also known as the gateway station, the ground station or the base station, etc.) has the functions of a network device (such as a base station) or some functions of a network device. At this time, the gateway can be regarded as a network device. Or, if the network device and the gateway are separately deployed, the delay of the feeder link includes the delay from the satellite to the gateway and the delay from the gateway to the network device. Fig. 1(b) is a schematic diagram of the network architecture of the regenerative mode in which the NTN is integrated with the terrestrial network. In this schematic diagram, the NTN device is taken as a satellite for example. In actual applications, the NTN device can also be a high-altitude platform device or a drone, etc. When the satellite operates in the regenerative mode, the satellite has data processing capabilities, that is, it has the functions of a gateway device (such as a base station) or some functions of a network device. At this time, the satellite can be regarded as a network device.

[0052] Currently, the following problems need to be solved in the communication of NTN devices:

[0053] First, the high-speed movement of the NTN device causes the relative position between the terminal device and the NTN device to change, resulting in the terminal device frequently switching the NTN device to be accessed. The terminal device needs to switch the transmission resources for communication, resulting in a large signaling overhead.

[0054] Second, the time-frequency positions at which the beams of different NTN devices reach the terminal device vary greatly. After the terminal device switches to a new NTN device, it cannot correctly transmit information.

[0055] To solve the above problems, the present application provides corresponding embodiments, which will be specifically introduced below.

[0056] Figure 2 It is a schematic flowchart of a communication method provided by an embodiment of the present application. This method is executed by a terminal device or a module (such as a chip) of the terminal device. Hereinafter, the case where the terminal device executes this method will be taken as an example for description. Among them, the first transmission node described below may be an NTN device or a functional module within the NTN device, such as a base station module, a communication module, etc. The second transmission node described below may be an NTN device or a functional module within the NTN device, such as a base station module, a communication module, etc.

[0057] This method includes the following steps:

[0058] Step 201, the terminal device transmits information on the first transmission resource according to the time-frequency configuration information of the first transmission node corresponding to the first transmission resource in the first time period.

[0059] The first transmission resource is also referred to as a beam resource. The first transmission resource includes one or more of the following resources: synchronization signal / physical broadcast channel block (SSB) resource, SSB resource set, SSB resource set list, reference signal resource, reference signal resource set, reference signal resource set list, random access channel occasion (RO) resource, RO resource set, or RO resource set list. Among them, a resource set list contains multiple resource sets, and a resource set contains multiple resources. Among them, the reference signal here may be a channel status information reference signal (CSI-RS), a demodulation reference signal (DMRS), a sounding reference signal (SRS), etc.

[0060] The time-frequency configuration information of the first transmission node includes one or more of the following information 1) to 4):

[0061] 1) Ephemeris information of the first transmission node.

[0062] The ephemeris information includes, for example, at least one of the operating speed or location information of the NTN device.

[0063] 2) Downlink frequency pre-compensation information of the first transmission node.

[0064] The downlink frequency pre-compensation information represents the frequency offset value compensated by the satellite when transmitting signals.

[0065] 3) Uplink frequency post-compensation information of the first transmission node.

[0066] The uplink frequency post-compensation information represents the frequency offset value compensated by the satellite when receiving signals.

[0067] 4) Timing compensation information of the first transmission node.

[0068] For example, the timing compensation information includes at least one of commonTA, TA rate, Kmac, and koffset. commonTA is used to determine the timing advance (TA) compensation amount adopted when the terminal device accesses the first transmission node. TA rate represents the change rate of TA. Kmac represents the additional time offset when the downlink medium access control (MAC) signaling takes effect. Koffset represents the additional time offset for uplink scheduling.

[0069] Exemplarily, the potential protocol representation of the time-frequency configuration information of the first transmission node (such as a satellite) is as follows:

[0070]

[0071] Among them, sat-ConfigID is the name of the configuration, used to index the time-frequency configuration information of the first transmission node. Ephemeris is the ephemeris information, commonTA is used to determine the TA compensation amount when the terminal device accesses the first transmission node, DLfreqPrecom represents the downlink frequency pre-compensation information, and ULfreqPoscom represents the uplink frequency post-compensation information.

[0072] Exemplarily, taking the first transmission resource including a CSI-RS resource set list as an example, the potential protocol representation after associating the CSI-RS resource set list with the time-frequency configuration information of the first transmission node (such as a satellite) is:

[0073]

[0074] Exemplarily, taking the first transmission resource including CSI-RS resources as an example, the potential protocol expression form after associating the CSI-RS resources with the time-frequency configuration information of the first transmission node (such as a satellite) is as follows:

[0075]

[0076] Step 202, the terminal device transmits information on the first transmission resource according to the time-frequency configuration information of the second transmission node corresponding to the first transmission resource in the second time period.

[0077] The second time period is temporally after the first time period, that is, the second time period is a time period after the first time period. It should be noted that the second time period and the first time period may not overlap, or may partially overlap, and this application does not limit this.

[0078] The time-frequency configuration information of the second transmission node includes one or more of the following information: the ephemeris information of the second transmission node, the downlink frequency pre-compensation information of the second transmission node, the uplink frequency post-compensation information of the second transmission node, or the timing compensation information of the second transmission node. For the explanations of the meanings and functions of these information, reference can be made to the relevant explanations of the time-frequency configuration information of the aforementioned first transmission node, and details will not be elaborated here.

[0079] In the above solution, when multiple transmission nodes sequentially provide services to the terminal device in sequence, the terminal device uses the same transmission resource to transmit information with each transmission node in different time periods, without the need to frequently switch the accessed transmission node, so the signaling overhead can be reduced. And when transmitting data with different transmission nodes, the time-frequency configuration information of the corresponding transmission node is used to transmit data with the transmission node, so the normal transmission of information can be realized and the correctness of information transmission can be improved.

[0080] Next, different implementation methods for the terminal device to switch the used time-frequency configuration information are introduced.

[0081] Implementation method 1, the first transmission node dynamically notifies the terminal device of the time-frequency configuration information to be used and the effective time.

[0082] Exemplarily, the first transmission node sends configuration information to the terminal device, and the configuration information includes the time-frequency configuration information of the second transmission node corresponding to the first transmission resource and the effective time of the time-frequency configuration information of the second transmission node. Then the above step 202 can be: after the effective time arrives, the terminal device transmits information on the first transmission resource according to the time-frequency configuration information of the second transmission node in the second time period.

[0083] Exemplarily, the configuration information may be downlink control information (DCI), radio resource control (RRC) signaling, medium access control control element (MAC CE), etc. The implementation manner of this configuration information is also applicable to Implementation Method 2 to Implementation Method 4 below, which will be described uniformly here and will not be repeated later.

[0084] As an implementation method, the effective time may be a time point, indicating that after this time point arrives, the terminal device can use the time-frequency configuration information of the corresponding transmission node to perform data transmission on the first transmission resource. Taking the second transmission node as an example, the effective time corresponding to the second transmission node is a time point before the second time period or the start time of the second time period, indicating that after this effective time arrives, the terminal device can use the time-frequency configuration information of the second transmission node to perform data transmission on the first transmission resource.

[0085] As another implementation method, the effective time may also be a time period, indicating the effective time range of the corresponding time-frequency configuration information. At this time, this effective time is also referred to as the service time period of the transmission node. Taking the second transmission node as an example, if the service time period of the second transmission node is the second time period, then the effective time of the transmission configuration information of the second transmission node is this second time period.

[0086] The implementation manner of this effective time is also applicable to Implementation Method 2 to Implementation Method 4 below, which will be described uniformly here and will not be repeated later.

[0087] In the above Implementation Method 1, dynamically indicating the time-frequency configuration information to be used soon can achieve flexible configuration of the time-frequency configuration information.

[0088] Implementation Method 2: The first transmission node pre-configures the time-frequency configuration set for the terminal device, and then subsequently indicates the time-frequency configuration information and the effective time of the transmission node to be used next through indication information, where the time-frequency configuration information includes the time-frequency configuration information of one or more transmission nodes that the terminal device can use.

[0089] Exemplarily, before the above-mentioned step 201, the first transmission node or other transmission nodes send configuration information to the terminal device, and the configuration information includes a time-frequency configuration set. For example, the time-frequency configuration set includes the time-frequency configuration information of the first transmission node, the time-frequency configuration information of the second transmission node, and so on. After the above-mentioned step 201 and before step 202, the first transmission node sends indication information to the terminal device, and the indication information is used to indicate the time-frequency configuration information of the second transmission node in the time-frequency configuration set and the effective time of the time-frequency configuration information of the second transmission node. The above-mentioned step 202 may be: after the effective time arrives, the terminal device obtains the time-frequency configuration information of the second transmission node from the time-frequency configuration set, and transmits information on the first transmission resource according to the time-frequency configuration information of the second transmission node in the second time period.

[0090] In the above implementation method 2, by pre-configuring the time-frequency configuration set and then dynamically signaling to indicate the time-frequency configuration information of the transmission node in the time-frequency configuration set to be used later, flexible configuration of the time-frequency configuration information can be achieved, and signaling overhead in the dynamic configuration process can be reduced.

[0091] Implementation method 3: The first transmission node pre-configures the time-frequency configuration set and the effective time of the time-frequency configuration information of each transmission node in the time-frequency configuration set for the terminal device. Subsequently, after the effective time of the time-frequency configuration information of each transmission node arrives, the terminal device uses the time-frequency configuration information of the corresponding transmission node. Among them, the time-frequency configuration information includes the time-frequency configuration information of one or more transmission nodes that the terminal device can use.

[0092] Exemplarily, before the above-mentioned step 201, the first transmission node or other transmission nodes send configuration information to the terminal device, and the configuration information includes the time-frequency configuration set and the effective time of the time-frequency configuration information of each transmission node in the time-frequency configuration set. For example, the time-frequency configuration set includes the time-frequency configuration information of the first transmission node, the time-frequency configuration information of the second transmission node, and so on. The above-mentioned step 202 may be: after the effective time of the time-frequency configuration information of the second transmission node arrives, the terminal device obtains the time-frequency configuration information of the second transmission node from the time-frequency configuration set, and transmits information on the first transmission resource according to the time-frequency configuration information of the second transmission node in the second time period.

[0093] In the above implementation method 3, by pre-configuring the time-frequency configuration set and the effective time of the time-frequency configuration information of each transmission node in the time-frequency configuration set, and then the terminal device uses the time-frequency configuration information of the corresponding transmission node after the effective time of the time-frequency configuration information of each transmission node arrives, flexible configuration of the time-frequency configuration information can be achieved, and signaling overhead is reduced. And this implementation method 3 can also enable configuration modification of non-connected terminal devices.

[0094] Implementation method 4: The first transmission node pre-configures the time-frequency configuration set and the activation conditions of the time-frequency configuration information of each transmission node in the time-frequency configuration set for the terminal device. Subsequently, after the activation conditions of the time-frequency configuration information of each transmission node are met, the terminal device uses the time-frequency configuration information of the corresponding transmission node. Among them, the time-frequency configuration information includes the time-frequency configuration information of one or more transmission nodes that the terminal device can use.

[0095] Exemplarily, before the above step 201, the first transmission node or other transmission nodes send configuration information to the terminal device, and the configuration information includes the time-frequency configuration set and the activation conditions of the time-frequency configuration information of each transmission node in the time-frequency configuration set. For example, the time-frequency configuration set includes the time-frequency configuration information of the first transmission node, the time-frequency configuration information of the second transmission node, and so on. The above step 202 may be: After the activation condition of the time-frequency configuration information of the second transmission node is met, the terminal device obtains the time-frequency configuration information of the second transmission node from the time-frequency configuration set, and transmits information on the first transmission resource according to the time-frequency configuration information of the second transmission node in the second time period.

[0096] For example, the above activation condition may be that the RSRP of the reference signal (such as SSB, CSI-RS, or SRS, etc.) associated with the time-frequency configuration information of the transmission node is greater than a preset threshold value. Then the above step 202 may specifically be: When the RSRP of the reference signal associated with the time-frequency configuration information of the second transmission node is greater than the preset threshold value, the terminal device obtains the time-frequency configuration information of the second transmission node from the time-frequency configuration set, and transmits information on the first transmission resource according to the time-frequency configuration information of the second transmission node in the second time period.

[0097] In the above implementation method 4, by pre-configuring the time-frequency configuration set and the activation conditions of the time-frequency configuration information of each transmission node in the time-frequency configuration set, and subsequently, after the activation conditions of the time-frequency configuration information of each transmission node are met, the terminal device uses the time-frequency configuration information of the corresponding transmission node, flexible configuration of the time-frequency configuration information can be achieved, reducing signaling overhead. And this implementation method 4 can also enable configuration modification of non-connected state terminal devices.

[0098] For the above implementation methods 1 to 3, taking the transmission resource as the SSB resource and the transmission node as a satellite as an example, a specific example is given in Table 1 as follows.

[0099] Table 1

[0100]

[0101] Among them, Sat-ConfigID#1, Sat-ConfigID#2, and Sat-ConfigID#3 respectively represent the time-frequency configuration information of the first satellite, the time-frequency configuration information of the second satellite, and the time-frequency configuration information of the third satellite, and the corresponding effective times are all time periods, which are t0 to t1, t1 to t2, and t2 to t3 respectively.

[0102] For the above implementation method 4, taking the transmission resource as the CSI-RS resource and the transmission node as the satellite as an example, a specific example is given in Table 2 as follows.

[0103] Table 2

[0104]

[0105] Among them, Sat-ConfigID#1, Sat-ConfigID#2, and Sat-ConfigID#3 respectively represent the time-frequency configuration information of the first satellite, the time-frequency configuration information of the second satellite, and the time-frequency configuration information of the third satellite, and the corresponding effective conditions are respectively: the RSRP of SSB0 is greater than threshold 1, the RSRP of SSB1 is greater than threshold 2, and the RSRP of SSB2 is greater than threshold 3. Among them, the magnitude relationship between threshold 1, threshold 2, and threshold 3 is not limited, and they can all be the same, or any two of them are the same, or they can all be different.

[0106] Figure 3 It is a schematic flowchart of a communication method provided by an embodiment of the present application. This method is executed by the first transmission node or a module (such as a chip) of the first transmission node, and the second transmission node or a module (such as a chip) of the second transmission node. The following takes the first transmission node and the second transmission node executing this method as an example for illustration. Among them, the first transmission node can be an NTN device or a functional module within the NTN device, such as a base station module, a communication module, etc. The second transmission node can be an NTN device or a functional module within the NTN device, such as a base station module, a communication module, etc.

[0107] This method includes the following steps:

[0108] Step 301, the second transmission node sends the time-frequency configuration information of the second transmission node and the service time period of the second transmission node to the first transmission node.

[0109] Regarding the specific content and meaning included in the time-frequency configuration information of the second transmission node, reference can be made to Figure 2 the relevant descriptions in the embodiments, which will not be elaborated here.

[0110] The service time period of the second transmission node refers to the time range during which the second transmission node can provide services to the terminal device currently served by the first transmission node or the current service area of the first transmission node.

[0111] Among them, the first transmission node can be the transmission node currently providing services to the terminal device, so it can be called the serving transmission node. The second transmission node is the transmission node that will provide services to the terminal device next, so it can be called the relay transmission node.

[0112] Step 302, the first transmission node sends the time-frequency configuration information of the second transmission node and the service time period of the second transmission node to the terminal device served by the first transmission node.

[0113] In the above solution, the time-frequency configuration information and the service time period of the transmission node that will provide services to the terminal device next are pre-configured to the terminal device. Thus, after the service time period arrives, the terminal device can use the time-frequency configuration information of the corresponding transmission node to transmit information, which can achieve normal information transmission and improve the correctness of information transmission.

[0114] As an implementation method, the first transmission node can also send the information of the first transmission resource and the information of the service location corresponding to the first transmission resource to the second transmission node. The first transmission resource is the resource used by the first transmission node to provide services. Optionally, the first transmission node also sends the time for the first transmission node and the second transmission node to perform service handover to the second transmission node. In this solution, the first transmission node notifies the second transmission node of the information of the first transmission resource and the information of the service location corresponding to the first transmission resource in advance. Therefore, the second transmission node can also use the first transmission resource to communicate with the terminal device subsequently. Thus, the terminal device uses the same transmission resource to transmit information between different transmission nodes at different time periods, and does not need to frequently switch the accessed transmission node, so the signaling overhead can be reduced. Exemplarily, Table 3 below gives an example of the information of the first transmission resource and the information of the service location corresponding to the first transmission resource. This example takes the first transmission resource as the SSB resource.

[0115] Table 3

[0116] First transmission resource Service location Time of service handover (optional) SSB resource #0 Location #1 t0 SSB resource #1 Location #2 t1 …… …… ……

[0117] As another implementation method, the first transmission node may also send information about the first transmission resource and information about the terminal device to the second transmission node, where the first transmission resource is the resource used by the first transmission node to provide services to the terminal device. Optionally, the first transmission node also sends the time for service handover between the first transmission node and the second transmission node to the second transmission node. In this solution, the first transmission node notifies the second transmission node in advance of the information about the first transmission resource and the information about the terminal device. Therefore, the second transmission node can also use the first transmission resource to communicate with the terminal device subsequently. Thus, the terminal device transmits information to and from each transmission node using the same transmission resource in different time periods, without the need to frequently switch the accessed transmission node, and thus the signaling overhead can be reduced. Exemplarily, Table 4 below gives an example of the information about the first transmission resource and the information about the terminal device. This example takes the first transmission resource as the CRI-RS resource.

[0118] Table 4

[0119]

[0120]

[0121] It can be understood that, in order to implement the functions in the above embodiments, the terminal device, the first transmission node, or the second transmission node includes corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should easily realize that, combining the units and method steps of each example described in the embodiments disclosed in the present application, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application scenario and design constraint conditions of the technical solution.

[0122] Figure 4 and Figure 5 FIG. 18 is a schematic structural diagram of a possible communication device provided by an embodiment of the present application. These communication devices can be used to implement the functions of the terminal device or the first transmission node in the above method embodiments, and thus can also achieve the beneficial effects possessed by the above method embodiments. In the embodiments of the present application, the communication device may be a terminal device or a first transmission node, or may also be a module (such as a chip) applied to the terminal device or the first transmission node.

[0123] Figure 4 The shown communication device 400 includes a processing unit 410 and a transceiver unit 420. The communication device 400 is used to implement the functions of the terminal device or the first transmission node in the above method embodiments.

[0124] When the communication device 400 is used to implement the functions of the terminal device in the above method embodiments, the processing unit 410 is configured to control the transceiver unit 420 to transmit information on the first transmission resource according to the time-frequency configuration information of the first transmission node corresponding to the first transmission resource in the first time period; and transmit information on the first transmission resource according to the time-frequency configuration information of the second transmission node corresponding to the first transmission resource in the second time period.

[0125] In a possible implementation method, the first transmission resource includes one or more of the following resources: SSB resource, SSB resource set, SSB resource set list, reference signal resource, reference signal resource set, reference signal resource set list, RO resource, RO resource set, or RO resource set list.

[0126] In a possible implementation method, the time-frequency configuration information of the first transmission node includes one or more of the following information: ephemeris information of the first transmission node, downlink frequency pre-compensation information of the first transmission node, uplink frequency post-compensation information of the first transmission node, or timing compensation information of the first transmission node.

[0127] In a possible implementation method, the time-frequency configuration information of the second transmission node includes one or more of the following information: ephemeris information of the second transmission node, downlink frequency pre-compensation information of the second transmission node, uplink frequency post-compensation information of the second transmission node, or timing compensation information of the second transmission node.

[0128] In a possible implementation method, the processing unit 410 is further configured to control the transceiver unit 420 to receive the configuration information from the first transmission node, where the configuration information includes the time-frequency configuration information of the second transmission node corresponding to the first transmission resource and the effective time of the time-frequency configuration information of the second transmission node; the processing unit 410 is configured to control the transceiver unit 420 to transmit information on the first transmission resource according to the time-frequency configuration information of the second transmission node corresponding to the first transmission resource in the second time period, specifically including: being configured to transmit information on the first transmission resource according to the time-frequency configuration information of the second transmission node in the second time period after the effective time arrives.

[0129] In a possible implementation method, the processing unit 410 is further configured to control the transceiver unit 420 to receive indication information from the first transmission node, where the indication information is used to indicate the time-frequency configuration information of the second transmission node in a preconfigured set of time-frequency configurations and the effective time of the time-frequency configuration information of the second transmission node; the processing unit 410 is configured to control the transceiver unit 420 to transmit information on the first transmission resource according to the time-frequency configuration information of the second transmission node corresponding to the first transmission resource in a second time period, specifically including: being configured to, after the effective time arrives, obtain the time-frequency configuration information of the second transmission node from the time-frequency configuration set, and transmit information on the first transmission resource according to the time-frequency configuration information of the second transmission node in the second time period.

[0130] In a possible implementation method, the processing unit 410 is configured to control the transceiver unit 420 to transmit information on the first transmission resource according to the time-frequency configuration information of the second transmission node corresponding to the first transmission resource in a second time period, specifically including: being configured to, after the preconfigured effective time of the time-frequency configuration information of the second transmission node arrives, obtain the time-frequency configuration information of the second transmission node from the preconfigured time-frequency configuration set, and transmit information on the first transmission resource according to the time-frequency configuration information of the second transmission node in the second time period.

[0131] In a possible implementation method, the processing unit 410 is configured to control the transceiver unit 420 to transmit information on the first transmission resource according to the time-frequency configuration information of the second transmission node corresponding to the first transmission resource in a second time period, specifically including: being configured to, when the RSRP of the reference signal associated with the time-frequency configuration information of the second transmission node is greater than a preset threshold, obtain the time-frequency configuration information of the second transmission node from the preconfigured time-frequency configuration set, and transmit information on the first transmission resource according to the time-frequency configuration information of the second transmission node in the second time period.

[0132] When the communication device 400 is used to implement the function of the first transmission node in the above method embodiment, the processing unit 410 is configured to control the transceiver unit 420 to receive the time-frequency configuration information of the second transmission node and the service time period of the second transmission node from the second transmission node; and send the time-frequency configuration information of the second transmission node and the service time period of the second transmission node to the terminal device served by the first transmission node.

[0133] In a possible implementation method, the processing unit 410 is further configured to control the transceiver unit 420 to send information on the first transmission resource and information on the service location corresponding to the first transmission resource to the second transmission node, where the first transmission resource is a resource used by the first transmission node to provide services.

[0134] In a possible implementation, the processing unit 410 is further configured to control the transceiver unit 420 to send information on the first transmission resource and information on the terminal device to the second transmission node, where the first transmission resource is a resource used by the first transmission node to provide services for the terminal device.

[0135] In a possible implementation, the first transmission resource includes one or more of the following resources: SSB resource, SSB resource set, SSB resource set list, reference signal resource, reference signal resource set, reference signal resource set list, RO resource, RO resource set, or RO resource set list.

[0136] In a possible implementation, the processing unit 410 is further configured to control the transceiver unit 420 to send the time for service handover between the first transmission node and the second transmission node to the second transmission node.

[0137] For a more detailed description of the above processing unit 410 and transceiver unit 420, reference can be directly made to the relevant descriptions in the above method embodiments and will not be elaborated here.

[0138] Figure 5 The illustrated communication device 500 includes a processor 510 and an interface circuit 520. The processor 510 and the interface circuit 520 are coupled to each other. It can be understood that the interface circuit 520 can be a transceiver or an input / output interface. Optionally, the communication device 500 may further include a memory 530 for storing instructions executed by the processor 510, or input data required for the processor 510 to run the instructions, or data generated after the processor 510 runs the instructions.

[0139] When the communication device 500 is used to implement the above method embodiments, the processor 510 is used to implement the functions of the above processing unit 410, and the interface circuit 520 is used to implement the functions of the above transceiver unit 420.

[0140] It can be understood that the processor in the embodiments of the present application may be a central processing unit (CPU), or may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0141] The method steps in the embodiments of the present application can be implemented in a hardware manner or by a processor executing software instructions. The software instructions can be composed of corresponding software modules, and the software modules can be stored in a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, a register, a hard disk, a removable hard disk, a compact disc read-only memory (CD-ROM), or any other form of storage medium well-known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in a terminal device or a first transmission node. Of course, the processor and the storage medium can also exist as discrete components in an access network device or a terminal.

[0142] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. A computer program refers to a set of instructions that direct each step of an electronic computer or other device with message processing capabilities, usually written in a certain programming language and running on a certain target architecture. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are executed in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer program or instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program or instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired or wireless manner. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or a data center integrating one or more available media. The available medium can be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it can also be an optical medium, such as a digital video disc; or it can be a semiconductor medium, such as a solid-state drive. The computer-readable storage medium can be a volatile or non-volatile storage medium, or can include both volatile and non-volatile types of storage media.

[0143] In various embodiments of the present application, without special instructions and logical conflicts, the terms and / or descriptions between different embodiments are consistent and can be cross-referenced. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0144] In the present application, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural. In the text description of the present application, the character " / " generally represents an "or" relationship between the front and rear associated objects; in the formula of the present application, the character " / " represents a "division" relationship between the front and rear associated objects.

[0145] It can be understood that the various numerical numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application. The magnitude of the serial numbers of the above processes does not mean the sequence of execution, and the execution sequence of each process should be determined according to its function and internal logic.

Claims

1. A communication method, characterized in that, Applied to a terminal device or a module of a terminal device, the method includes: Transmitting information on the first transmission resource according to the time-frequency configuration information of the first transmission node corresponding to the first transmission resource in a first time period; Transmitting information on the first transmission resource according to the time-frequency configuration information of the second transmission node corresponding to the first transmission resource in a second time period.

2. The method according to claim 1, characterized in that, The first transmission resource includes one or more of the following resources: Synchronization signal / physical broadcast channel block SSB resource, SSB resource set, SSB resource set list, reference signal resource, reference signal resource set, reference signal resource set list, random access channel opportunity RO resource, RO resource set or RO resource set list.

3. The method according to claim 1 or 2, characterized in that, The time-frequency configuration information of the first transmission node includes one or more of the following information: Ephemeris information of the first transmission node, downlink frequency pre-compensation information of the first transmission node, uplink frequency post-compensation information of the first transmission node or timing compensation information of the first transmission node.

4. The method according to any one of claims 1 to 3, characterized in that, The time-frequency configuration information of the second transmission node includes one or more of the following information: Ephemeris information of the second transmission node, downlink frequency pre-compensation information of the second transmission node, uplink frequency post-compensation information of the second transmission node or timing compensation information of the second transmission node.

5. The method according to any one of claims 1 to 4, characterized in that, The method further includes: Receiving configuration information from the first transmission node, where the configuration information includes the time-frequency configuration information of the second transmission node corresponding to the first transmission resource and the effective time of the time-frequency configuration information of the second transmission node; The step of transmitting information on the first transmission resource according to the time-frequency configuration information of the second transmission node corresponding to the first transmission resource in the second time period includes: After the effective time arrives, transmitting information on the first transmission resource according to the time-frequency configuration information of the second transmission node in the second time period.

6. The method according to any one of claims 1 to 4, characterized in that, The method further includes: Receiving indication information from the first transmission node, where the indication information is used to indicate the time-frequency configuration information of the second transmission node in a pre-configured time-frequency configuration set and the effective time of the time-frequency configuration information of the second transmission node; The step of transmitting information on the first transmission resource according to the time-frequency configuration information of the second transmission node corresponding to the first transmission resource in the second time period includes: After the effective time arrives, obtaining the time-frequency configuration information of the second transmission node from the time-frequency configuration set, and transmitting information on the first transmission resource according to the time-frequency configuration information of the second transmission node in the second time period.

7. The method according to any one of claims 1 to 4, characterized in that, The step of transmitting information on the first transmission resource according to the time-frequency configuration information of the second transmission node corresponding to the first transmission resource in the second time period includes: After the pre-configured effective time of the time-frequency configuration information of the second transmission node arrives, obtaining the time-frequency configuration information of the second transmission node from the pre-configured time-frequency configuration set, and transmitting information on the first transmission resource according to the time-frequency configuration information of the second transmission node in the second time period.

8. The method according to any one of claims 1 to 4, characterized in that, Transmitting information on the first transmission resource according to the time-frequency configuration information of the second transmission node corresponding to the first transmission resource in the second time period includes: When the reference signal received power (RSRP) of the reference signal associated with the time-frequency configuration information of the second transmission node is greater than a preset threshold, obtaining the time-frequency configuration information of the second transmission node from a pre-configured time-frequency configuration set, and transmitting information on the first transmission resource according to the time-frequency configuration information of the second transmission node in the second time period.

9. A communication method, characterized in that, Applied to a first transmission node or a module of the first transmission node, the method includes: Receiving the time-frequency configuration information of the second transmission node and the service time period of the second transmission node from the second transmission node; Sending the time-frequency configuration information of the second transmission node and the service time period of the second transmission node to a terminal device served by the first transmission node.

10. The method according to claim 9, characterized in that, The method further includes: Sending information on the first transmission resource and information on the service location corresponding to the first transmission resource to the second transmission node, where the first transmission resource is a resource used by the first transmission node to provide services.

11. The method according to claim 9, characterized in that, The method further includes: Sending information on the first transmission resource and information on the terminal device to the second transmission node, where the first transmission resource is a resource used by the first transmission node to provide services to the terminal device.

12. The method according to claim 10 or 11, characterized in that, The first transmission resource includes one or more of the following resources: Synchronization signal / physical broadcast channel block (SSB) resource, SSB resource set, SSB resource set list, reference signal resource, reference signal resource set, reference signal resource set list, random access channel opportunity (RO) resource, RO resource set, or RO resource set list.

13. The method according to any one of claims 9 to 12, characterized in that, The method further includes: Sending the time for the first transmission node and the second transmission node to perform service handover to the second transmission node.

14. A communication device, characterized in that, Including a module for executing the method according to any one of claims 1 to 8, or executing the method according to any one of claims 9 to 13.

15. A communication device, characterized in that, Including a processor and an interface circuit, where the processor is used to communicate with other devices through the interface circuit and execute the method according to any one of claims 1 to 8, or execute the method according to any one of claims 9 to 13.

16. A computer program product, characterized in that, The computer program product includes instructions that, when running on a processor, cause the processor to execute the method according to any one of claims 1 to 8, or execute the method according to any one of claims 9 to 13.

17. A computer-readable storage medium, characterized in that, A computer program or instructions are stored in the storage medium, and when the computer program or instructions are executed by a communication device, the method according to any one of claims 1 to 8 is implemented, or the method according to any one of claims 9 to 13 is implemented.

18. A communication system, characterized in that, Including: A first transmission node, configured to receive the time-frequency configuration information of the second transmission node and the service time period of the second transmission node from the second transmission node; Sending the time-frequency configuration information of the second transmission node and the service time period of the second transmission node to a terminal device served by the first transmission node; The second transmission node is configured to send the time-frequency configuration information of the second transmission node and the service time period of the second transmission node to the first transmission node.

19. The communication system according to claim 18, characterized in that, The first transmission node is further configured to send the information of the first transmission resource and the information of the service location corresponding to the first transmission resource to the second transmission node, where the first transmission resource is the resource used by the first transmission node to provide services.

20. The communication system according to claim 18, characterized in that, The first transmission node is further configured to send the information of the first transmission resource and the information of the terminal device to the second transmission node, where the first transmission resource is the resource used by the first transmission node to provide services for the terminal device.

21. The communication system according to claim 19 or 20, characterized in that, The first transmission resource includes one or more of the following resources: Synchronization signal / Physical broadcast channel block SSB resource, SSB resource set, SSB resource set list, reference signal resource, reference signal resource set, reference signal resource set list, random access channel opportunity RO resource, RO resource set or RO resource set list.

22. The communication system according to any one of claims 18 to 21, characterized in that, The first transmission node is further configured to send the time for the first transmission node and the second transmission node to perform service handover to the second transmission node.

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