Communication method and communication device

Abstract

The present application relates to a communication method, comprising: a first communication device sends first information, the first information comprising handover-related first predicted information, and the first predicted information being information predicted on the basis of actual measurement information of the first communication device. According to embodiments of the present application, the handover delay can be reduced by means of handover-related predicted information.

Description

Communication method and communication device Technical Field

[0001] The present application relates to the field of communications, and more specifically, to a communication method and a communication device. Background Art

[0002] The handover mechanism can be triggered by Layer 3 (L3) measurements and implemented through Radio Resource Control (RRC) signaling. L3-based handover requires reconfiguration of the RRC or Packet Data Convergence Protocol (PDCP) layer and resetting the Medium Access Control (MAC) and / or physical layer. In Layer 1 or Layer 2-triggered mobility (LTM), L1 / L2 signaling is used to change the terminal's serving cell while maintaining the higher-layer configuration, thereby reducing latency, overhead, and interruption time.

[0003] Summary of the Invention

[0004] The embodiments of the present application provide a communication method and a communication device, which can reduce the switching delay.

[0005] An embodiment of the present application provides a communication method, including:

[0006] The first communication device sends first information, where the first information includes first prediction information related to handover, where the first prediction information is information predicted based on actual measurement information of the first communication device.

[0007] An embodiment of the present application provides a communication method, including:

[0008] The second communication device receives first information, where the first information includes first prediction information related to handover, where the first prediction information is information predicted based on actual measurement information of the first communication device.

[0009] An embodiment of the present application provides a first communication device, including:

[0010] The sending unit is configured to send first information, where the first information includes first prediction information related to handover, and the first prediction information is information predicted based on actual measurement information of the first communication device.

[0011] An embodiment of the present application provides a second communication device, including:

[0012] The receiving unit is configured to receive first information, where the first information includes first prediction information related to handover, and the first prediction information is information predicted based on actual measurement information of the first communication device.

[0013] An embodiment of the present application provides a communication device, comprising: a transceiver, a processor, and a memory. The memory is used to store a computer program, the transceiver is used to communicate with other devices, and the processor is used to call and execute the computer program stored in the memory so that the communication device performs the above-mentioned communication method.

[0014] An embodiment of the present application provides a chip for implementing the above-mentioned communication method.

[0015] Specifically, the chip includes: a processor, which is used to call and run a computer program from a memory, so that a device equipped with the chip executes the above-mentioned communication method.

[0016] An embodiment of the present application provides a computer-readable storage medium for storing a computer program, which, when executed by a device, enables the device to execute the above-mentioned communication method.

[0017] An embodiment of the present application provides a computer program product, including computer program instructions, which enable a computer to execute the above-mentioned communication method.

[0018] An embodiment of the present application provides a computer program, which, when executed on a computer, enables the computer to execute the above-mentioned communication method.

[0019] In the embodiment of the present application, the switching delay can be reduced by using the prediction information related to the switching. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a schematic diagram of an application scenario according to an embodiment of the present application.

[0021] FIG2 is a schematic flow chart of LTM signaling.

[0022] Figure 3 is a flowchart of LTM inter DU switching.

[0023] FIG4 is a schematic flowchart of a communication method according to an embodiment of the present application.

[0024] FIG5 is a schematic flowchart of a communication method according to another embodiment of the present application.

[0025] FIG6 is a schematic flowchart of a communication method according to an embodiment of the present application.

[0026] FIG7 is a schematic flowchart of a communication method according to another embodiment of the present application.

[0027] FIG8 is a schematic block diagram of a first communication device according to an embodiment of the present application.

[0028] FIG9 is a schematic block diagram of a second communication device according to an embodiment of the present application.

[0029] FIG10 is a schematic block diagram of a communication device according to an embodiment of the present application.

[0030] FIG11 is a schematic block diagram of a chip according to an embodiment of the present application.

[0031] FIG12 is a schematic block diagram of a communication system according to an embodiment of the present application. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0033] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-U) system, NR on unlicensed spectrum (NR-based access to unlicensed spectrum, NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), Fifth Generation (5G) system or other communication systems.

[0034] Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but will also support, for example, device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), vehicle-to-vehicle (V2V) communication, or vehicle-to-everything (V2X) communication, etc. The embodiments of the present application can also be applied to these communication systems.

[0035] In one embodiment, the communication system in the embodiment of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, and a standalone (SA) networking scenario.

[0036] In one embodiment, the communication system in the embodiment of the present application can be applied to an unlicensed spectrum, wherein the unlicensed spectrum can also be considered as a shared spectrum; or, the communication system in the embodiment of the present application can also be applied to an authorized spectrum, wherein the authorized spectrum can also be considered as an unshared spectrum.

[0037] The embodiments of the present application describe various embodiments in conjunction with network devices and terminal devices, wherein the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.

[0038] The terminal device can be a station (STAION, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a next-generation communication system such as an NR network, or a terminal device in a future evolved Public Land Mobile Network (PLMN) network, etc.

[0039] In an embodiment of the present application, the terminal device can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can also be deployed on the water surface (such as ships, etc.); it can also be deployed in the air (such as airplanes, balloons and satellites, etc.).

[0040] In an embodiment of the present application, the terminal device may be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, or a wireless terminal device in a smart home, etc.

[0041] As an example and not a limitation, in the embodiment of the present application, the terminal device may also be a wearable device. Wearable devices may also be called wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are fully functional, large in size, and can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0042] In an embodiment of the present application, the network device may be a device for communicating with a mobile device. The network device may be an access point (AP) in a WLAN, an evolved base station (eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and a network device (gNB) in an NR network, or a network device in a future evolved PLMN network or a network device in an NTN network, etc.

[0043] As an example and not a limitation, in an embodiment of the present application, the network device may have a mobile feature, for example, the network device may be a mobile device. Alternatively, the network device may be a satellite or a balloon station. For example, the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a high elliptical orbit (HEO) satellite, etc. Optionally, the network device may also be a base station set up in a location such as land or water.

[0044] In an embodiment of the present application, the network device can provide services for a cell, and the terminal device communicates with the network device through the transmission resources used by the cell (for example, frequency domain resources, or spectrum resources). The cell can be a cell corresponding to the network device (for example, a base station). The cell can belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: metro cells, micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0045] FIG1 exemplarily illustrates a communication system 100. The communication system includes a network device 110 and two terminal devices 120. In one embodiment, the communication system 100 may include multiple network devices 110, and each network device 110 may include a different number of terminal devices 120 within its coverage area, which is not limited in this embodiment of the present application.

[0046] In one embodiment, the communication system 100 may further include other network entities such as a Mobility Management Entity (MME) and an Access and Mobility Management Function (AMF), which is not limited in this embodiment of the present application.

[0047] Among them, the network equipment may include access network equipment and core network equipment. That is, the wireless communication system also includes multiple core networks for communicating with the access network equipment. The access network equipment can be an evolutionary base station (evolutional node B, abbreviated as eNB or e-NodeB) macro base station, micro base station (also called "small base station"), pico base station, access point (AP), transmission point (TP) or new generation base station (new generation Node B, gNodeB), etc. in a long-term evolution (LTE) system, a next-generation (mobile communication system) (next radio, NR) system or an authorized auxiliary access long-term evolution (LAA-LTE) system.

[0048] It should be understood that in the embodiments of the present application, a device having a communication function in a network / system may be referred to as a communication device. Taking the communication system shown in Figure 1 as an example, the communication device may include a network device and a terminal device having a communication function. The network device and the terminal device may be specific devices in the embodiments of the present application and will not be described in detail here. The communication device may also include other devices in the communication system, such as a network controller, a mobility management entity, and other network entities, which are not limited in the embodiments of the present application.

[0049] It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and / or" is simply a description of an association between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " generally indicates that the related objects are in an "or" relationship.

[0050] It should be understood that the "indication" mentioned in the embodiments of this application can be a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association between A and B.

[0051] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and being indicated, configuration and being configured, etc.

[0052] To facilitate understanding of the technical solutions of the embodiments of the present application, the relevant technologies of the embodiments of the present application are described below. The following relevant technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all fall within the protection scope of the embodiments of the present application.

[0053] 1. LTM Process

[0054] The current handover mechanism is triggered by L3 measurements and completed through Radio Resource Control (RRC) signaling. L3-based handover requires reconfiguration of the RRC or Packet Data Convergence Protocol (PDCP) layer and resetting the MAC and / or physical layer. In LTM, L1 / L2 signaling is used to change the UE's serving cell while maintaining the high-level configuration unchanged, thereby reducing latency, overhead, and interruption time. The LTM process is shown in Figure 2. During the LTM execution phase, the UE periodically reports the L1 measurement results. The network side makes LTM decisions based on the measurement results and issues a cell switch command in the form of a MAC control element (CE). The UE leaves the serving cell and attempts to access the target LTM cell. In the LTM decision, the UE retains the LTM candidate cell configuration information after completing the handover to facilitate subsequent handovers.

[0055] As shown in Figure 2, an example of an LTM process may include the following stages:

[0056] LTM preparation phase:

[0057] S201: If the UE is connected in RRC, the UE sends a measurement report to the gNB. The gNB can prepare LTM candidates.

[0058] S202: The gNB sends an RRC reconfiguration (LTM candidate cell configuration) message to the UE.

[0059] S203: The UE sends an RRC reconfiguration complete message to the gNB.

[0060] Early synchronization stage:

[0061] S204a: DL synchronization with candidate cells.

[0062] S204b: UL synchronization with candidate cells.

[0063] LTM cell handover execution phase:

[0064] S205: The UE sends an L1 measurement report to the gNB. The gNB makes an LTM decision.

[0065] S206: The gNB sends a cell switch command (MAC CE) to the UE.

[0066] S207: The UE disengages from the source and applies the target configuration. The UE and gNB perform a RACH procedure.

[0067] LTM cell handover completion stage:

[0068] S208: LTM cell switch completion

[0069] As shown in FIG3 , an example of an LTM inter DU handover process may include the following steps:

[0070] S301: The UE sends a lower layer measurement report to the source gNB-DU.

[0071] S302: L1 / L2 Triggered Mobility Cell switch decision is performed among the source gNB-DU, candidate gNB-DU, and target gNB-DU.

[0072] S303: The source gNB-DU sends an LTM command to the UE.

[0073] S304: The source gNB-DU sends an LTM CELL CHANGE NOTIFICATION (Target cell ID, Selected beam information) message to the target gNB-DU.

[0074] S305: The target gNB-DU sends a target gNB-DU configuration message (target cell ID, selected beam information) to the candidate gNB-DU.

[0075] S306. The source gNB-DU sends the downlink data delivery status to the target gNB-DU.

[0076] LTM is discussed only in the intra-DU and inter-DU scenarios within a centralized unit (CU). To maximize handover time, LTM is designed to eliminate the need for random access during handover, essentially implementing RACH-less LTM.

[0077] From the DU's perspective, a key factor in achieving RACH-less is the initial uplink (UL) message delivery. Specifically, the UE needs to send an uplink message to notify the target DU of its arrival. This message requires the network to provide an uplink grant (UL grant) to the UE. This UL grant can be a configured grant (CG) before a cell switch or a dynamic grant (DG) during a cell switch.

[0078] For CG, in the inter-DU scenario, the target DU does not know the specific switching time and needs to receive UL information on all pre-configured CG resources, which will occupy a lot of resources.

[0079] For DG, in inter-DU scenarios, the target DU needs to know when the UE is performing a cell handover so it can determine when to send an UL grant to the UE via the Physical Downlink Control Channel (PDCCH). The standard requires the source DU to notify the target DU of the impending handover after sending a cell switch command. This notification is transmitted via the F1 interface, with the message forwarded from the source DU to the target DU via the CU. In some deployment scenarios, this can result in a transmission delay of approximately 10ms.

[0080] When CUs and DUs are deployed in a relatively centralized manner, this latency is acceptable in inter-DU scenarios. However, if LTM technology is further extended to inter-CU scenarios, interface latency could seriously impact LTM efficiency.

[0081] In addition, the UE needs to periodically perform L1 measurement reporting. Since the interval between LTM cell switch preparation and execution is long, L1 reporting may occupy a large amount of air interface resources.

[0082] FIG4 is a schematic flow chart of a communication method 400 according to an embodiment of the present application. The method can optionally be applied to the system shown in FIG1 , but is not limited thereto. The method includes at least part of the following contents.

[0083] S410. A first communication device sends first information, where the first information includes first prediction information related to handover.

[0084] In an embodiment of the present application, a first communication device may send first information to a second communication device. The first communication device may be a terminal device, and the second communication device may be a network device such as a source DU. The first information may be prediction information related to handover. For example, the first information may include measurement information predicted based on actual measurement information such as reference signal received power (RSRP), reference signal received quality (RSRQ), and other measurement values, which may be referred to as measurement prediction information. The measurement prediction information may be obtained using an artificial intelligence (AI) algorithm. For another example, the first information may include handover prediction information such as a target cell or a candidate cell predicted based on actual measurement information.

[0085] In one embodiment, the first prediction information may be information predicted based on actual measurement information of the first communication device. For example, after the first communication device, such as a UE, performs measurement to obtain actual measurement information such as RSRP, it may predict the predicted RSRP based on the actually measured RSRP. The UE may then send the predicted RSRP to a network device, such as a source DU, and the source DU may determine handover prediction information such as a target cell or candidate cell for handover based on the predicted RSRP. For another example, after the UE performs measurement to obtain actual measurement information such as RSRP, it may predict the handover prediction information such as a target cell or candidate cell for handover based on the actually measured RSRP. The UE may then send the handover prediction information to the source DU.

[0086] In one embodiment, the first prediction information includes measurement prediction information, and the measurement prediction information includes prediction information of one or more measurement time points after the current moment.

[0087] In the embodiment of the present application, the duration between two adjacent measurement time points among the multiple measurement time points may be equal to the measurement period of the actual measurement, such as the layer 1 measurement (L1 measurement), or may be less than the measurement period of the layer 1 measurement. For example, the first communications device may predict the RSRP, RSRQ, and other measurement predicted values ​​at times t2, t3, and so on, after t1 based on the actual RSRP, RSRQ, and other measurement values ​​at the current time t1.

[0088] In one implementation, the measurement prediction information is layer 1 measurement prediction information, and a duration between two adjacent measurement time points among the multiple measurement time points is less than or equal to a measurement period of layer 1 measurement.

[0089] In an embodiment of the present application, after the first communication device sends L1 measurement prediction information to the second communication device, the second communication device can determine the target cell or candidate cell on which the handover command needs to be executed, as well as the time information for starting to execute the handover command, etc. based on the L1 measurement prediction information.

[0090] In one embodiment, the first information also includes candidate cell information. In this embodiment of the present application, the candidate cell may also be referred to as a recommended cell. If the first information sent by the first communication device to the second communication device includes target cell information, the second communication device may, based on the target cell information, instruct the target cell to execute a handover command based on the predicted information. If the first information sent by the first communication device to the second communication device includes candidate cell information, the second communication device may select a target cell from the candidate cells based on the candidate cell information and instruct the target cell to execute a handover command based on the predicted information.

[0091] In one embodiment, the target cell may be served by a target distributed unit (DU), and the candidate cell may be served by a candidate DU. The target cell in the embodiment of the present application may also be replaced by a target DU, and the candidate cell may also be replaced by a candidate DU.

[0092] FIG5 is a schematic flow chart of a communication method 500 according to another embodiment of the present application. The method may include one or more features of the above method. In one embodiment, the method further includes:

[0093] S510. The first communication device receives second information, where the second information includes second prediction information related to handover determined by the second communication device based on the first prediction information. In an embodiment of the present application, after the second communication device determines the second information based on the received first information, it may send the second information to the first communication device. After the first communication device receives the second information from the second communication device, it may perform subsequent handover-related operations based on the second information. For example, if the first prediction information includes measurement prediction information, the second prediction information determined based on the measurement prediction information may include handover prediction information.

[0094] In one embodiment, the second prediction information includes at least one of the following:

[0095] A cell switching command, used to instruct the first communication device to perform cell switching;

[0096] The first duration is used to instruct the first communication device to perform cell switching according to the first duration.

[0097] In an embodiment of the present application, the cell switching command may include target cell information such as an identifier of the target DU. The first communication device may start cell switching after a first duration has passed since the second prediction information was received. If the second prediction information indicates the start time of the first duration, the first communication device may start cell switching after the first duration has passed since the start time after receiving the second prediction information. For example, the network device may make an LTM decision based on the measurement prediction information reported by the UE, and send the second prediction information including the cell switching command and the first duration to the UE in the form of a MAC CE. After receiving the second prediction information, the UE may start to leave the serving cell and attempt to access the target DU after the first duration has passed, i.e., perform cell switching. In addition, the network device may also send notification information to the target DU to inform the target DU in advance that a UE is about to access. The target DU may prepare for switching in advance. For example, the target DU may decode the notification message in advance, configure the UE uplink access resources, select an access beam, etc.

[0098] In one embodiment, the method further comprises:

[0099] S520: The first communication device receives a second information update indication, where the second information update indication is used to update the second information.

[0100] In the embodiment of the present application, after the first communication device receives the second information, it will wait for a period of time, namely the first duration, before opening access to the target cell. During this period of time, if the second communication device finds that the second information needs to be updated, it can send a second information update indication to the first communication device.

[0101] In one embodiment, the second information update indication includes at least one of the following:

[0102] An updated cell handover command, used to replace the cell handover command in the second information;

[0103] The updated first duration is used to replace the first duration in the second information;

[0104] The cell switching cancellation command is used to instruct the first communication device to cancel the cell switching.

[0105] In the embodiment of the present application, when the first communication device receives an updated cell handover command, it can replace the original cell handover command (e.g., the cell handover command in the second information received last time). For example, if the identifier of the new target cell in the updated cell handover command is different from that in the original cell handover command, the new target cell can be accessed.

[0106] In this embodiment of the present application, upon receiving the updated first duration, the first communications device may restart the timing and enable access to the target cell after the updated first duration has elapsed. The updated first duration may be greater than, less than, or equal to the original first duration (e.g., the first duration in the second information received last time).

[0107] In an embodiment of the present application, when the first communication device receives a command to cancel cell switching, it can cancel the cell switching, stop timing the first duration, and not attempt to access the target cell.

[0108] In one embodiment, the first communication device sends the first information, including: the first communication device sends the first information under a first condition, where the first condition is related to the switching trigger condition and / or prediction result of the first communication device.

[0109] In this embodiment of the present application, the first communication device can obtain the cell handover command in advance, reducing the air interface transmission delay introduced by the real-time transmission of the cell handover command. In addition, the first communication device can apply part of the target configuration in advance, further reducing the delay in accessing the target cell.

[0110] In one embodiment, the first prediction information in the first information includes at least one of the following:

[0111] Target cell information, used to identify the cell to which the first communication device needs to be handed over;

[0112] Candidate cell information, used to identify a cell to which the first communication device may switch;

[0113] The second duration is used to inform the second communication device that the first communication device performs cell switching according to the second duration;

[0114] Notify the target cell indication, used to instruct the second communication device to notify the target cell to prepare for cell handover;

[0115] The beam indication is used to inform the second communication device of the beam to be used for transmitting the uplink message and / or the beam recommended for the target cell to adopt.

[0116] In an embodiment of the present application, the first prediction information may also include handover prediction information predicted by the first communications device based on actual measurement information. The first communications device may predict the first prediction information based on the actual measurement information. The first communications device may predict measurement prediction information based on the actual measurement information, and then determine the first prediction information based on the measurement prediction information. For example, the UE may employ an AI algorithm to predict handover prediction information, such as a target cell or candidate cell at time t2 or t3 after t1, based on the RSRP or RSRQ actually measured at the current time t1.

[0117] In an embodiment of the present application, the target cell information may include an identifier of the target cell, such as an identifier of the target DU. The candidate cell information may include an identifier of the candidate cell, such as an identifier of the candidate DU. One or more of the target cell information, candidate cell information, second duration, target cell notification indication, and beam indication information may be carried in the same message or in separate messages.

[0118] For example, if the first prediction information sent by the first communication device to the second communication device includes target cell information, the second communication device can send notification information to the target cell corresponding to the target cell information to notify the target cell to immediately start sending dynamic authorization through PDCCH or detect whether there is uplink data in the pre-configured configuration authorization.

[0119] For another example, if the first prediction information sent by the first communication device to the second communication device includes target cell information and a second duration, the second communication device can send notification information to the target cell corresponding to the target cell information to notify the target cell to start sending dynamic authorization through PDCCH after the second duration expires or to detect whether there is uplink data in the pre-configured configuration authorization.

[0120] For another example, the first prediction information may include one or more candidate cell information. Multiple candidate cell information may correspond to multiple second durations, and the second durations corresponding to different candidate cell information may be the same or different. If the first prediction information sent by the first communications device to the second communications device includes one or more candidate cell information, the second communications device may send notification information to all candidate cells corresponding to the candidate cell information to notify all candidate cells to immediately begin sending dynamic authorizations via the PDCCH or to detect whether there is uplink data within the pre-configured configuration authorization.

[0121] For another example, if the first prediction information sent by the first communication device to the second communication device includes one or more candidate cell information and its corresponding second duration, the second communication device can send notification information to all candidate cells corresponding to the candidate cell information to notify all candidate cells to start sending dynamic authorization through PDCCH after their corresponding second duration expires or to detect whether there is uplink data in the pre-configured configuration authorization.

[0122] For another example, if the first prediction information sent by the first communication device to the second communication device includes a target cell notification indication, the second communication device may send any of the above notification information to the target cell corresponding to the target cell information to notify the target cell to prepare for cell handover. Otherwise, no notification information may be sent to the target cell.

[0123] For another example, if the first prediction information sent by the first communication device to the second communication device includes beam indication information, the second communication device can obtain the beam to be used to transmit the uplink message and / or the transmit / receive beam recommended for the target cell based on the beam indication information.

[0124] In one embodiment, the first condition includes at least one of the following:

[0125] The first communication device meets the switching triggering condition at the current moment;

[0126] The first communication device meets a handover triggering condition within a first time window after the current moment;

[0127] The probability that the first communication device meets the handover triggering condition within the first time window after the current moment is higher than a preset threshold;

[0128] The first communication device needs to update the first information according to the prediction result.

[0129] In the embodiment of the present application, the phrase "handover trigger condition is met" can be replaced by "handover occurs." If the first communication device meets the handover trigger condition or a handover occurs at the current moment, the first information can be sent to the second communication device. If the first communication device will meet the handover trigger condition or a handover occurs within a first time window after the current moment, the first information can be sent to the second communication device. If the probability of the first communication device meeting the handover trigger condition or a handover occurring within the first time window after the current moment is greater than a preset threshold, the first information can be sent to the second communication device.

[0130] In the embodiments of the present application, the handover triggering conditions may be pre-configured by the network and are not specifically limited herein. For example, the layer 3 handover triggering conditions include: A1-A6 events, B1 events, and B2 events. The layer 1 handover triggering conditions of the embodiments of the present application may refer to the layer 3 handover triggering conditions, and may also include other events.

[0131] In this embodiment of the present application, a first communications device can predict information about a target cell or candidate cell based on its actual measurement information, eliminating the need for frequent measurement reporting. This reduces air interface occupancy and energy consumption of the first communications device. Furthermore, the steps of the second communications device can be reduced, shortening handover latency. Furthermore, the target cell, such as the target DU, can be notified of the handover in advance, and the second communications device, such as the source DU, can notify other candidate DUs (not the target DU) in advance to release reserved access resources, thereby reducing network resource usage.

[0132] In one embodiment, the method further includes: the first communication device receiving configuration information, the configuration information being used to instruct the first communication device to perform L1 measurement relaxation. In this embodiment of the present application, L1 measurement relaxation can also be understood as L1 measurement reporting relaxation. By relaxing L1 measurements or L1 measurement reporting, signaling can be reduced. L1 measurement relaxation can be combined with the above-mentioned prediction information. By predicting the predicted L1 measurement value for a period of time in the future, the number of measurements during the prediction period can be reduced, thereby reducing the energy consumption of the first communication device. This step can be performed before step S410, before S510, or before S520.

[0133] In one embodiment, the configuration information includes at least one of the following:

[0134] Target cell information, used to identify the cell to which the first communication device needs to be handed over;

[0135] Candidate cell information, used to identify a cell to which the first communication device may switch;

[0136] A second time window is used to instruct the first communications device to predict an L1 measurement prediction value within the second time window after the current moment;

[0137] The number of predicted time points is used to instruct the first communications device to predict the L1 measurement prediction value according to the number of predicted time points after the current moment;

[0138] The relax reporting instruction is used to instruct the first communication device to relax measurement reporting.

[0139] For example, the configuration information includes target cell information and a second time window, and the first communications device predicts an L1 measurement prediction value for the target cell specified by the target cell information within the second time window. If the configuration information includes multiple sets of corresponding target cell information and second time windows, the second time window values ​​corresponding to each target cell can be the same or different.

[0140] For another example, the configuration information includes target cell information and a number of predicted time points, and the first communications device predicts an L1 measurement prediction value of a target cell specified by the target cell information at a given number of predicted time points after the current moment. The first configuration may include multiple sets of corresponding target cell information and predicted time points.

[0141] For another example, when the target cell information is missing, all configurations may be applied to all candidate cells by default.

[0142] For another example, the configuration information includes target cell information, a second time window, and a relaxed reporting indicator. The first communications device predicts the L1 measurement prediction value of the target cell specified by the target cell information within the second time window. The relaxed reporting indicator can be represented by one or more bits. For example, 1 indicates relaxed reporting, and 0 indicates no relaxation. If the relaxed reporting indicator value is 1, after the first communications device completes reporting at the current moment, it will no longer report L1 measurements or L1 measurement prediction values ​​within the second time window. If the relaxed reporting indicator value is 0, the first communications device will continue to perform periodic reporting according to the given measurement cycle.

[0143] For another example, the configuration information includes the target cell information and the second time window, but does not include the relaxed reporting indication. That is, when the relaxed reporting indication is missing, it may be defaulted that relaxed reporting is not performed.

[0144] The target cell information in the above example can be replaced with candidate cell information, and examples are not repeated here.

[0145] In the embodiment of the present application, the first communication device does not need to perform L1 measurement reporting or L1 measurement prediction reporting within the second time window or the predicted time point, thereby reducing air interface transmission signaling without sacrificing access performance.

[0146] In one embodiment, the method further includes: the first communications device sending its own capability information, where the capability information is used to indicate the predicted capability of the first communications device. This step may be performed before step S410, before step S510, or before step S520. This step may also be performed before receiving the configuration information.

[0147] In one embodiment, the capability information includes at least one of the following:

[0148] whether the first communication device supports a prediction function;

[0149] Whether the first communication device supports predicting an L1 measurement prediction value;

[0150] whether the first communication device supports target cell prediction;

[0151] whether the first communication device supports candidate cell prediction;

[0152] whether the first communication device supports prediction of cell grouping to which the candidate cell belongs;

[0153] whether the first communication device supports second duration prediction;

[0154] Whether the first communication device supports informing the target cell of the indication prediction.

[0155] In the embodiment of the present application, the target cell prediction may include target cell identity prediction, the candidate cell prediction may include candidate cell identity prediction, and the candidate cell group prediction may include candidate cell group identity prediction.

[0156] In one embodiment, the method further includes: the first communications device receiving a first indication, where the first indication is used to indicate whether the first communications device is allowed to execute its reported prediction capability.

[0157] In this embodiment of the present application, the first communication device may first report its capabilities before the second communication device sends configuration information, or before the first communication device reports its first information. After receiving the capability information, the second communication device may issue a first indication to the first communication device. This first indication may provide feedback on whether the first communication device is permitted to perform a prediction corresponding to the capability information. The first indications corresponding to different capability information may be different or the same.

[0158] For example, the capability information reported by the first communication device to the second communication device includes support for the prediction function, support for predicted L1 measurement prediction values, and support for target cell prediction. The first indication corresponding to support for the prediction function sent by the second communication device to the first communication device is 1, the first indication corresponding to support for predicted L1 measurement prediction values ​​is 0, and the first indication corresponding to support for target cell prediction is 1. In this case, the first communication device can perform target cell prediction but cannot perform L1 measurement prediction value prediction.

[0159] For example, the capability information reported by the first communication device to the second communication device includes support for candidate cell prediction, support for prediction of cell groups to which the candidate cell belongs, and support for second duration prediction. The first indication sent by the second communication device to the first communication device is 1. In this case, the first communication device can perform candidate cell prediction, prediction of cell groups to which the candidate cell belongs, and second duration prediction.

[0160] FIG6 is a schematic flow chart of a communication method 600 according to an embodiment of the present application. The method can optionally be applied to the system shown in FIG1 , but is not limited thereto. The method includes at least part of the following contents.

[0161] S610: A second communication device receives first information, where the first information includes first prediction information related to handover.

[0162] In one implementation, the first prediction information may be information predicted based on actual measurement information of the first communications device.

[0163] In one embodiment, the first prediction information includes measurement prediction information, and the measurement prediction information includes prediction information of one or more measurement time points after the current moment.

[0164] In one implementation, the measurement prediction information is layer 1 measurement prediction information, and a duration between two adjacent measurement time points among the multiple measurement time points is less than or equal to a measurement period of layer 1 measurement.

[0165] In one implementation, the first information also includes candidate cell information.

[0166] FIG7 is a schematic flow chart of a communication method 700 according to another embodiment of the present application. The method may include one or more features of the above method. In one embodiment, the method further includes:

[0167] S710: The second communication device sends second information, where the second information includes second prediction information related to handover determined by the second communication device according to the first prediction information.

[0168] In one embodiment, the second prediction information includes at least one of the following:

[0169] A cell switching command, used to instruct the first communication device to perform cell switching;

[0170] The first duration is used to instruct the first communication device to perform cell switching according to the first duration.

[0171] In one embodiment, the method further comprises:

[0172] S720: The second communication device sends a second information update indication, where the second information update indication is used to update the second information.

[0173] In one embodiment, the second information update indication includes at least one of the following:

[0174] An updated cell handover command, used to replace the cell handover command in the second information;

[0175] The updated first duration is used to replace the first duration in the second information;

[0176] The cell switching cancellation command is used to instruct the first communication device to cancel the cell switching.

[0177] In one embodiment, the first prediction information includes at least one of the following:

[0178] Target cell information, used to identify the cell to which the first communication device needs to be handed over;

[0179] Candidate cell information, used to identify a cell to which the first communication device may switch;

[0180] The second duration is used to inform the second communication device that the first communication device performs cell switching according to the second duration;

[0181] Notify the target cell indication, used to instruct the second communication device to notify the target cell to prepare for cell handover;

[0182] The beam indication is used to inform the second communication device of the beam to be used for transmitting the uplink message and / or the beam recommended for the target cell to adopt.

[0183] In one embodiment, the method further comprises:

[0184] S730. After receiving the first information, the second communication device sends a notification message to the target cell corresponding to the target cell information, where the notification message is used to notify the target cell to start sending a dynamic grant through a physical downlink control channel (PDCCH) immediately or after the second duration expires, or to detect whether there is uplink data in the pre-configured configuration grant; or

[0185] After receiving the first information, the second communication device sends notification information to the candidate cell corresponding to the candidate cell information. The notification information is used to notify the candidate cell to start sending dynamic authorization through the physical downlink control channel PDCCH immediately or after the second time period expires, or to detect whether there is uplink data in the pre-configured configuration authorization.

[0186] In one embodiment, the method further includes: the second communication device sending configuration information, the configuration information being used to instruct the first communication device to perform L1 measurement relaxation. This step may be performed before step S610, or before step S710, or before step S720, or before step S730.

[0187] In one embodiment, the configuration information includes at least one of the following:

[0188] Target cell information, used to identify the cell to which the first communication device needs to be handed over;

[0189] Candidate cell information, used to identify a cell to which the first communication device may switch;

[0190] A second time window is used to instruct the first communications device to predict an L1 measurement prediction value within the second time window after the current moment;

[0191] The number of predicted time points is used to instruct the first communications device to predict the L1 measurement prediction value according to the number of predicted time points after the current moment;

[0192] The relax reporting instruction is used to instruct the first communication device to relax measurement reporting.

[0193] In one embodiment, the method further includes: the second communications device receiving capability information from the first communications device, the capability information being used to indicate the predicted capability of the first communications device. This step may be performed before step S610, before step S710, before step S720, or before step S730. This step may also be performed before sending the configuration information.

[0194] In one embodiment, the capability information includes at least one of the following:

[0195] whether the first communication device supports a prediction function;

[0196] Whether the first communication device supports predicting an L1 measurement prediction value;

[0197] whether the first communication device supports target cell prediction;

[0198] whether the first communication device supports candidate cell prediction;

[0199] whether the first communication device supports prediction of cell grouping to which the candidate cell belongs;

[0200] whether the first communication device supports second duration prediction;

[0201] Whether the first communication device supports informing the target cell of the indication prediction.

[0202] In one embodiment, the method further includes: the second communication device sending a first indication, where the first indication is used to indicate whether the first communication device is allowed to execute its reported prediction capability.

[0203] For specific examples of the second communication device executing methods 600 and 700 in this embodiment, reference may be made to the relevant descriptions of the second communication device in the above methods 400 and 500 , which will not be repeated here for the sake of brevity.

[0204] The communication method provided by the embodiments of the present application may include a prediction-based fast RACH-less LTM method. By predicting at least one of the UE's L1 measurement value, target cell, and handover time in the future, the UE / target DU can be informed of the handover time in advance. This method can overcome the impact of F1 information transmission delay in inter-DU situations, reduce LTM handover delay, reduce air interface transmission signaling volume, and reduce candidate cell resource reservation.

[0205] Example 1: The network, such as the source DU, decides the LTM target cell

[0206] S1. After receiving the L1 measurement report, the source DU sends a cell switch command to the UE and simultaneously notifies the target DU via the F1 interface. The target DU typically learns of the upcoming handover later than the UE. If the source DU can obtain predicted future L1 measurement information, it can inform the target DU in advance, allowing both the UE and target DU to learn of the upcoming handover almost simultaneously or with a reduced time difference.

[0207] Referring to Figure 2 , during the L1 measurement report process in step 5, the UE sends first information to the source DU. This first information is the L1 measurement (hereinafter referred to as the predicted L1 measurement value) for a future time period predicted by the UE based on the actual L1 measurement. Optionally, the source DU may determine the target DU based on the predicted L1 measurement value and then send second information to the UE.

[0208] For example, the L1 measurement prediction value includes prediction values ​​for one or more measurement time points after the current moment. The duration between two adjacent measurement time points in the multiple measurement time points can be equal to or less than the L1 measurement period. If it is less than the L1 measurement period, the network can more quickly determine whether to notify the target DU of the upcoming handover in advance.

[0209] In this embodiment, the impact on the protocol is relatively small, and the timing L1 measurement prediction can be achieved with high accuracy based on AI technology.

[0210] S2. The UE receives second information from the source DU. The second information may include a cell switching command and a first duration.

[0211] For example, the first duration may instruct the UE to enable access to the target DU after the first duration has elapsed (for example, the UE may send UL information to the target DU or detect the PDCCH).

[0212] As shown in Figure 2, in step 6, the UE can obtain the cell handover command in advance, reducing the air interface transmission delay introduced by the real-time transmission of the cell handover command. At the same time, the UE can apply part of the target configuration in advance, further reducing the delay in accessing the target DU.

[0213] Optionally, the second information is updated.

[0214] Considering that the network actually makes LTM decisions based on the prediction results reported by the UE, and that the UE's execution of this command is not immediate, before the UE executes the cell handover command, the network may change the target cell or cancel the LTM process based on the latest measured results or the latest prediction results.

[0215] The source DU sends a second information modification indication to the UE. The second information modification indication includes one or more of the following:

[0216] Updated cell handover command;

[0217] The first duration of the update;

[0218] Cancels the toggle command.

[0219] Exemplarily, the second information modification instruction includes the updated cell handover command and the first duration, and the second information modification instruction replaces the original second information content. In particular, if the updated first duration is 0, the updated cell handover command is executed immediately.

[0220] Exemplarily, the second information modification indication includes canceling the handover command, and the UE continues to stay in the current cell without performing LTM.

[0221] Exemplarily, the second information modification indication includes an updated first duration, the UE replaces the original first duration, and performs switching after the updated first duration expires.

[0222] As another implementation manner, the first information may include the L1 measurement report of the UE and the recommended target cell. Such information may help the network side to make a better decision on the LTM target cell.

[0223] Example 2: UE decides on LTM target cell

[0224] Design idea: Existing standard UEs need to periodically report L1 measurement reports. After the source DU receives the L1 measurement report, it sends a cell switching command to the UE and informs the target DU through the F1 interface. The target DU will know that the switch will occur later than the UE. If the UE can independently predict when to switch to which target DU based on the detected L1 measurement results, it can notify the corresponding target DU in advance through the source DU. In addition, in order to reduce the delay impact of the cell beam pairing between the UE and the target DU (especially in high-frequency scenarios), the UE can also predict the beam configuration in advance and inform the target DU through the F1 interface. The target DU can configure resources (such as CG resources) accordingly.

[0225] When the first condition is met, the UE sends third information to the source DU. The third information may be an example of the first information in the above-mentioned methods 400 to 700, and is named the third information to distinguish it from the first information in embodiment 1.

[0226] Exemplarily, the third information includes one or more of the following:

[0227] The identifier of the target DU, used to uniquely identify the target DU;

[0228] The candidate cell identifier, or the identifier of the cell group to which the candidate cell belongs, can be used by the network side to find the corresponding target DU.

[0229] a second duration, where the second duration (predicted by the UE) indicates that the UE will perform a cell switch after the second duration;

[0230] Notify the target DU of the indication. After receiving the notification of the target DU, the source DU notifies the target DU to perform the handover.

[0231] Beam indication information, which is used to inform the source DU UE of the beam to be used to transmit uplink messages and / or recommend the target DU to adopt the transmit / receive beam.

[0232] For example, if there is only one candidate target DU (referred to as candidate DU), the third information does not need to include an identifier of the target DU, and the source DU can directly determine the target DU.

[0233] Exemplarily, if the third information includes the identifier of the target DU, the source DU notifies the corresponding target DU to immediately start sending a dynamic grant via the PDCCH or to check whether there is uplink data in a pre-configured grant.

[0234] Exemplarily, if the third information includes the identifier of the target DU and the second duration, the source DU notifies the corresponding target DU to start sending dynamic grants via PDCCH or detect whether there is uplink data in the pre-configured configuration grant after the second duration expires.

[0235] Exemplarily, if the third information includes the identifier of the target DU and the notification target DU indication, the source DU notifies the corresponding target DU to immediately start sending dynamic grants via the PDCCH or to detect whether there is uplink data in the pre-configured configuration grant.

[0236] Exemplarily, the first condition includes:

[0237] The UE meets the handover triggering condition at the current moment (the handover triggering condition is pre-configured by the network and is not specifically limited here);

[0238] The UE will meet the handover triggering condition or handover will occur within the first time window after the current moment;

[0239] The UE meets the handover triggering condition within the first time window after the current moment or the probability of handover occurring is higher than a preset threshold;

[0240] If the prediction results change, the original third information needs to be updated.

[0241] In this embodiment, the UE does not need to perform frequent L1 measurement reporting, which reduces air interface occupancy and UE energy consumption; the source DU does not need to perform step 6 in Figure 2, which shortens the switching delay; the target DU can be informed of the occurrence of the switching in advance; and at the same time, the source DU can notify other candidate DUs that are not the target DU in advance to release reserved access resources, thereby reducing network resource occupancy.

[0242] Example 3: Relaxation of L1 measurement report

[0243] In Example 1, the reporting period is consistent with the current L1 measurement. Compared to the current L1 reporting, which only reports the measurement value at the current moment, the first information reported in Example 1 may include L1 measurement predictions at multiple time points, which will occupy a larger amount of air interface resources. Most of the reports are actually repeated. Signaling can be reduced by relaxing the reporting without sacrificing access performance. For the L1 measurement reporting scheme in the related art, it is also possible to reduce L1 measurements in the predicted period by predicting and reporting L1 measurement values ​​for a period of time in the future, thereby reducing UE energy consumption (i.e., the amount of uplink transmission data of the UE remains unchanged, but the actual number of measurements is reduced).

[0244] In this embodiment, the network may send a first configuration to the UE, and the UE performs L1 measurement relaxation reporting based on the first configuration.

[0245] Illustratively, the first configuration includes one or more of the following:

[0246] The identifier of the target DU, used to uniquely identify the target DU.

[0247] Candidate cell identifier, or identifier of the cell group to which the candidate cell belongs.

[0248] The second time window is the prediction time window, and the UE predicts the L1 measurement prediction value within the second time window after the current moment.

[0249] Number of predicted time points: The UE predicts the L1 measurement prediction value for a given number of predicted time points after the current moment.

[0250] Relaxation reporting indication, which explicitly indicates whether the UE supports relaxation reporting.

[0251] In one embodiment, the first configuration includes an identifier of a target DU and a second time window, and the UE predicts an L1 measurement prediction value of a cell specified by the identifier of the target DU within the second time window. The first configuration may include multiple groups of corresponding target DU identifiers and second time windows, and the second time window values ​​corresponding to each target DU may be the same or different.

[0252] In one embodiment, the first configuration includes an identifier of a target DU and a number of predicted time points, and the UE predicts L1 measurement prediction values ​​for cells specified by the identifiers of target DUs at a given number of predicted time points after the current moment. The first configuration may include multiple sets of corresponding target DU identifiers and predicted time points.

[0253] As an implementation manner, when the identifier of the target DU is missing, all configurations are applied to all candidate DUs by default.

[0254] As an implementation method, the first configuration includes an identifier of a target DU, a second time window, and a relaxed reporting indicator. The UE predicts the L1 measurement prediction value of the cell specified by the identifier of the target DU within the second time window. The relaxed reporting indicator can be represented by a single bit, where 1 indicates relaxed reporting and 0 indicates no relaxation. If the relaxed reporting indicator value is 1, the UE will no longer perform L1 measurement reporting or L1 measurement prediction value reporting within the second time window after completing reporting at the current moment. If the relaxed reporting indicator value is 0, the UE will continue to perform periodic reporting according to the given measurement period.

[0255] As an implementation manner, the first configuration includes the identifier of the target DU and the second time window, but does not include a relaxed reporting indication, that is, when the relaxed reporting indication is missing, relaxed reporting is not performed by default.

[0256] In this embodiment, the UE does not need to perform L1 measurement reporting or L1 measurement prediction reporting within the second time window or at a predicted time point, thereby reducing air interface transmission signaling without sacrificing access performance.

[0257] Example 4: UE capability reporting

[0258] In embodiments 1-3, the network needs to know whether the UE supports prediction, so as to determine whether to perform corresponding network configuration. Therefore, before performing fast / relaxed RACH-less LTM, the UE needs to report its capabilities.

[0259] In this embodiment, before the network sends the first configuration and / or the UE reports the first information / third information, the UE reports its capability, and the network sends a first indication after receiving the capability, and the first indication is used to provide feedback on whether the corresponding prediction is allowed.

[0260] Capability reporting includes one or more of the following:

[0261] Whether the UE supports the prediction function;

[0262] Whether the UE supports the prediction of L1 measurement values;

[0263] Whether the UE supports target DU prediction;

[0264] Whether the UE supports the prediction of candidate cell identities, or the cell group to which the candidate cell belongs.

[0265] Whether the UE supports the second duration prediction;

[0266] Whether the UE supports notification of target DU indication prediction;

[0267] The first indication is whether to allow the corresponding prediction capability reported by the UE to be executed. Each capability can be represented by 1 bit, 1 indicates that the UE is supported to perform prediction, and 0 indicates that the prediction is not supported.

[0268] The embodiment of the present application proposes a prediction-based fast RACH-less LTM method, through which the LTM switching delay can be reduced, the amount of air interface transmission signaling can be reduced, and the candidate cell resource reservation can be reduced.

[0269] Furthermore, while the current LTM only considers intra-DU and intra-CU inter-DU scenarios, the present embodiment is applicable to inter-CU scenarios that LTM may expand in the future. Accordingly, in the present embodiment, the network-side information transmission path can be changed from source DU->CU->target DU to source DU->source CU->target CU->target DU.

[0270] FIG8 is a schematic block diagram of a first communication device 800 according to an embodiment of the present application. The first communication device 800 may include:

[0271] The sending unit 801 is configured to send first information, where the first information includes first prediction information related to handover.

[0272] In one implementation, the first prediction information may be information predicted based on actual measurement information of the first communications device.

[0273] In one embodiment, the first prediction information includes measurement prediction information, and the measurement prediction information includes prediction information of one or more measurement time points after the current moment.

[0274] In one implementation, the measurement prediction information is layer 1 measurement prediction information, and a duration between two adjacent measurement time points among the multiple measurement time points is less than or equal to a measurement period of layer 1 measurement.

[0275] In one implementation, the first information also includes candidate cell information.

[0276] In one embodiment, the first communication device further includes:

[0277] The receiving unit 802 is configured to receive second information, where the second information includes second prediction information related to handover determined by the second communication device according to the first prediction information.

[0278] In one embodiment, the second prediction information includes at least one of the following:

[0279] A cell switching command, used to instruct the first communication device to perform cell switching;

[0280] The first duration is used to instruct the first communication device to perform cell switching according to the first duration.

[0281] In one implementation, the receiving unit 802 is further configured to receive a second information update indication, where the second information update indication is used to update the second information.

[0282] In one embodiment, the second information update indication includes at least one of the following:

[0283] An updated cell handover command, used to replace the cell handover command in the second information;

[0284] The updated first duration is used to replace the first duration in the second information;

[0285] The cell switching cancellation command is used to instruct the first communication device to cancel the cell switching.

[0286] In one embodiment, the first prediction information includes at least one of the following:

[0287] Target cell information, used to identify the cell to which the first communication device needs to be handed over;

[0288] Candidate cell information, used to identify a cell to which the first communication device may switch;

[0289] The second duration is used to inform the second communication device that the first communication device performs cell switching according to the second duration;

[0290] Notify the target cell indication, used to instruct the second communication device to notify the target cell to prepare for cell handover;

[0291] The beam indication is used to inform the second communication device of the beam to be used for transmitting the uplink message and / or the beam recommended for the target cell to adopt.

[0292] In one implementation, the sending unit 801 is configured to send the first information under a first condition, where the first condition is related to a handover triggering condition and / or a prediction result of the first communication device.

[0293] In one embodiment, the first condition includes at least one of the following:

[0294] The first communication device meets the switching triggering condition at the current moment;

[0295] The first communication device meets a handover triggering condition within a first time window after the current moment;

[0296] The probability that the first communication device meets the handover triggering condition within the first time window after the current moment is higher than a preset threshold;

[0297] The first communication device needs to update the first information according to the prediction result.

[0298] In one implementation, the receiving unit 802 is further configured to receive configuration information, where the configuration information is used to instruct the first communication device to perform L1 measurement relaxation.

[0299] In one embodiment, the configuration information includes at least one of the following:

[0300] Target cell information, used to identify the cell to which the first communication device needs to be handed over;

[0301] Candidate cell information, used to identify a cell to which the first communication device may switch;

[0302] A second time window is used to instruct the first communications device to predict an L1 measurement prediction value within the second time window after the current moment;

[0303] The number of predicted time points is used to instruct the first communications device to predict the L1 measurement prediction value according to the number of predicted time points after the current moment;

[0304] The relax reporting instruction is used to instruct the first communication device to relax measurement reporting.

[0305] In one implementation, the sending unit 801 is further configured to send its own capability information, where the capability information is used to indicate the predicted capability of the first communication device.

[0306] In one embodiment, the capability information includes at least one of the following:

[0307] whether the first communication device supports a prediction function;

[0308] Whether the first communication device supports predicting an L1 measurement prediction value;

[0309] whether the first communication device supports target cell prediction;

[0310] whether the first communication device supports candidate cell prediction;

[0311] whether the first communication device supports prediction of cell grouping to which the candidate cell belongs;

[0312] whether the first communication device supports second duration prediction;

[0313] Whether the first communication device supports informing the target cell of the indication prediction.

[0314] In one embodiment, the receiving unit 802 is further configured to receive a first indication, where the first indication is used to indicate whether the first communication device is allowed to execute its reported prediction capability.

[0315] The first communication device 800 of the embodiment of the present application can implement the corresponding functions of the first communication device in the aforementioned method embodiment. The processes, functions, implementation methods and beneficial effects corresponding to the various modules (sub-modules, units or components, etc.) in the first communication device 800 can be found in the corresponding descriptions in the above-mentioned method embodiments, and will not be repeated here. It should be noted that the functions described in the various modules (sub-modules, units or components, etc.) in the first communication device 800 of the embodiment of the application can be implemented by different modules (sub-modules, units or components, etc.) or by the same module (sub-module, unit or component, etc.).

[0316] FIG9 is a schematic block diagram of a second communication device 900 according to an embodiment of the present application. The second communication device 900 may include:

[0317] The receiving unit 901 is configured to receive first information, where the first information includes first prediction information related to handover.

[0318] In one implementation, the first prediction information may be information predicted based on actual measurement information of the first communications device.

[0319] In one embodiment, the first prediction information includes measurement prediction information, and the measurement prediction information includes prediction information of one or more measurement time points after the current moment.

[0320] In one implementation, the measurement prediction information is layer 1 measurement prediction information, and a duration between two adjacent measurement time points among the multiple measurement time points is less than or equal to a measurement period of layer 1 measurement.

[0321] In one implementation, the first information also includes candidate cell information.

[0322] In one embodiment, the second communication device further includes:

[0323] The sending unit 902 is configured to send second information, where the second information includes second prediction information related to the handover determined by the second communication device according to the first prediction information.

[0324] In one embodiment, the second prediction information includes at least one of the following:

[0325] A cell switching command, used to instruct the first communication device to perform cell switching;

[0326] The first duration is used to instruct the first communication device to perform cell switching according to the first duration.

[0327] In one implementation, the sending unit 902 is further configured to send a second information update indication, where the second information update indication is used to update the second information.

[0328] In one embodiment, the second information update indication includes at least one of the following:

[0329] An updated cell handover command, used to replace the cell handover command in the second information;

[0330] The updated first duration is used to replace the first duration in the second information;

[0331] The cell switching cancellation command is used to instruct the first communication device to cancel the cell switching.

[0332] In one embodiment, the first prediction information includes at least one of the following:

[0333] Target cell information, used to identify the cell to which the first communication device needs to be handed over;

[0334] Candidate cell information, used to identify a cell to which the first communication device may switch;

[0335] The second duration is used to inform the second communication device that the first communication device performs cell switching according to the second duration;

[0336] Notify the target cell indication, used to instruct the second communication device to notify the target cell to prepare for cell handover;

[0337] The beam indication is used to inform the second communication device of the beam to be used for transmitting the uplink message and / or the beam recommended for the target cell to adopt.

[0338] In one embodiment, the sending unit 902 is further configured for the second communication device to send notification information to the target cell corresponding to the target cell information after receiving the first information, and the notification information is used to notify the target cell to start immediately or after the second duration expires to start sending dynamic authorization through the physical downlink control channel PDCCH or to detect whether there is uplink data in the pre-configured configuration authorization; or

[0339] After receiving the first information, the second communication device sends notification information to the candidate cell corresponding to the candidate cell information. The notification information is used to notify the candidate cell to start sending dynamic authorization through the physical downlink control channel PDCCH immediately or after the second time period expires, or to detect whether there is uplink data in the pre-configured configuration authorization.

[0340] In one implementation, the sending unit 902 is further configured to send configuration information, where the configuration information is used to instruct the first communication device to perform L1 measurement relaxation.

[0341] In one embodiment, the configuration information includes at least one of the following:

[0342] Target cell information, used to identify the cell to which the first communication device needs to be handed over;

[0343] Candidate cell information, used to identify a cell to which the first communication device may switch;

[0344] A second time window is used to instruct the first communications device to predict an L1 measurement prediction value within the second time window after the current moment;

[0345] The number of predicted time points is used to instruct the first communications device to predict the L1 measurement prediction value according to the number of predicted time points after the current moment;

[0346] The relax reporting instruction is used to instruct the first communication device to relax measurement reporting.

[0347] In one embodiment, the receiving unit 901 is further configured to receive capability information from the first communication device, where the capability information is used to indicate the predicted capability of the first communication device.

[0348] In one embodiment, the capability information includes at least one of the following:

[0349] whether the first communication device supports a prediction function;

[0350] Whether the first communication device supports predicting an L1 measurement prediction value;

[0351] whether the first communication device supports target cell prediction;

[0352] whether the first communication device supports candidate cell prediction;

[0353] whether the first communication device supports prediction of cell grouping to which the candidate cell belongs;

[0354] whether the first communication device supports second duration prediction;

[0355] Whether the first communication device supports informing the target cell of the indication prediction.

[0356] In one embodiment, the sending unit 901 is further configured to send a first indication, where the first indication is used to indicate whether the first communication device is allowed to execute its reported prediction capability.

[0357] The second communication device 900 of the embodiment of the present application can implement the corresponding functions of the second communication device in the aforementioned method embodiment. The processes, functions, implementation methods and beneficial effects corresponding to the various modules (sub-modules, units or components, etc.) in the second communication device 900 can be found in the corresponding descriptions in the above-mentioned method embodiments, and will not be repeated here. It should be noted that the functions described in the various modules (sub-modules, units or components, etc.) in the second communication device 900 of the embodiment of the application can be implemented by different modules (sub-modules, units or components, etc.) or by the same module (sub-module, unit or component, etc.).

[0358] Figure 10 is a schematic structural diagram of a communication device 1000 according to an embodiment of the present application. The communication device 1000 includes a processor 1010, which can call and execute a computer program from a memory to enable the communication device 1000 to implement the method in the embodiment of the present application.

[0359] In one embodiment, the communication device 1000 may further include a memory 1020. The processor 1010 may call and execute a computer program from the memory 1020 to enable the communication device 1000 to implement the method in the embodiment of the present application.

[0360] The memory 1020 may be a separate device independent of the processor 1010 , or may be integrated into the processor 1010 .

[0361] In one embodiment, the communication device 1000 may further include a transceiver 1030 , and the processor 1010 may control the transceiver 1030 to communicate with other devices. Specifically, the transceiver 1030 may send information or data to other devices, or receive information or data sent by other devices.

[0362] The transceiver 1030 may include a transmitter and a receiver. The transceiver 1030 may further include an antenna, and the number of antennas may be one or more.

[0363] In one embodiment, the communication device 1000 may be the first communication device of the embodiment of the present application, and the communication device 1000 may implement the corresponding processes implemented by the first communication device in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0364] In one embodiment, the communication device 1000 may be the second communication device of the embodiment of the present application, and the communication device 1000 may implement the corresponding processes implemented by the second communication device in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0365] 11 is a schematic structural diagram of a chip 1100 according to an embodiment of the present application. The chip 1100 includes a processor 1110, which can call and execute a computer program from a memory to implement the method according to the embodiment of the present application.

[0366] In one embodiment, the chip 1100 may further include a memory 1120. The processor 1110 may call and execute a computer program from the memory 1120 to implement the method executed by the first communication device or the second communication device in the embodiment of the present application.

[0367] The memory 1120 may be a separate device independent of the processor 1110 , or may be integrated into the processor 1110 .

[0368] In one embodiment, the chip 1100 may further include an input interface 1130. The processor 1110 may control the input interface 1130 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0369] In one embodiment, the chip 1100 may further include an output interface 1140. The processor 1110 may control the output interface 1140 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0370] In one embodiment, the chip can be applied to the first communication device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the first communication device in each method of the embodiment of the present application. For the sake of brevity, it will not be repeated here.

[0371] In one embodiment, the chip can be applied to the second communication device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the second communication device in each method of the embodiment of the present application. For the sake of brevity, it will not be repeated here.

[0372] The chips used in the first communication device and the second communication device may be the same chip or different chips.

[0373] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0374] The processor mentioned above may be a general-purpose processor, a digital signal processor (DSP), a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), or other programmable logic devices, transistor logic devices, discrete hardware components, etc. The general-purpose processor mentioned above may be a microprocessor or any conventional processor, etc.

[0375] The memory mentioned above may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. The non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM).

[0376] It should be understood that the above-mentioned memories are exemplary but not restrictive. For example, the memories in the embodiments of the present application may also be static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM RAM (DR RAM), etc. In other words, the memories in the embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

[0377] FIG12 is a schematic block diagram of a communication system 1200 according to an embodiment of the present application. The communication system 1200 includes a first communication device 1210 and a second communication device 1220 .

[0378] The first communication device 1210 is configured to send first information, where the first information includes first prediction information related to handover. The first prediction information may be information predicted based on actual measurement information of the first communication device.

[0379] The second communication device 1220 is configured to receive the first information.

[0380] The first communication device 1210 can be used to implement the corresponding functions implemented by the first communication device in the above method, and the second communication device 1220 can be used to implement the corresponding functions implemented by the second communication device in the above method. For the sake of brevity, they are not described here in detail.

[0381] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When software is used for implementation, 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 instructions. When the computer program instructions are loaded and executed on a computer, the process or function in accordance with the embodiment of the present application is generated 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 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 instructions can be transmitted from a website, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode to another website, computer, server or data center. 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 data center that includes one or more available media integrations. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0382] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0383] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0384] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included within the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A communication method, comprising: The first communication device sends first information, where the first information includes first prediction information related to handover, and the first prediction information is information predicted based on the actual measurement information of the first communication device.

2. The method according to claim 1, wherein The first prediction information includes measurement prediction information, and the measurement prediction information includes prediction information for one or more measurement time points after the current moment.

3. The method according to claim 2, wherein The measurement prediction information is layer 1 measurement prediction information, and the duration between two adjacent measurement time points among the multiple measurement time points is less than or equal to the measurement period of layer 1 measurement.

4. The method according to any one of claims 1 to 3, wherein The first information further includes candidate cell information.

5. The method according to any one of claims 1 to 4, wherein The method further includes: The first communication device receives second information, where the second information includes second prediction information related to handover determined by the second communication device according to the first prediction information.

6. The method according to claim 5, wherein, The second prediction information includes at least one of the following: A cell handover command for instructing the first communication device to perform cell handover; A first duration for instructing the first communication device to perform cell handover according to the first duration.

7. The method according to claim 5 or 6, wherein The method further includes: The first communication device receives a second information update indication for updating the second information.

8. The method according to claim 7, wherein, The second information update indication includes at least one of the following: An updated cell handover command for replacing the cell handover command in the second information; An updated first duration for replacing the first duration in the second information; A cancel cell handover command for instructing the first communication device to cancel cell handover.

9. The method according to claim 1, wherein, The first prediction information includes at least one of the following: Target cell information for identifying the cell to which the first communication device needs to handover; Candidate cell information for identifying the cell to which the first communication device may handover; A second duration for informing the second communication device that the first communication device performs cell handover according to the second duration; An informing target cell indication for instructing the second communication device to notify the target cell to prepare for cell handover; A beam indication for informing the second communication device of the beam used for transmitting uplink messages and / or the beam recommended for the target cell to adopt.

10. The method according to claim 9, wherein, The first communication device sending the first information includes: The first communication device sends the first information under a first condition, and the first condition is related to the handover trigger condition and / or prediction result of the first communication device.

11. The method according to claim 10, wherein, The first condition includes at least one of the following: The first communication device reaches the handover trigger condition at the current moment; The first communication device reaches the handover trigger condition within a first time window after the current moment; The probability that the first communication device reaches the handover trigger condition within a first time window after the current moment is higher than a preset threshold; The first communication device needs to update the first information according to the prediction result.

12. The method according to any one of claims 1 to 11, wherein, The method further includes: The first communication device receives configuration information for instructing the first communication device to perform L1 measurement relaxation.

13. The method according to claim 12, wherein, The configuration information includes at least one of the following: Target cell information for identifying the cell to which the first communication device needs to handover; Candidate cell information, used to identify the cell to which the first communication device may switch; Second time window, used to indicate that the first communication device predicts the L1 measurement prediction value within the second time window after the current moment; Number of prediction time points, used to indicate that the first communication device predicts the L1 measurement prediction value according to the number of prediction time points after the current moment; Relaxed reporting indication, used to indicate that the first communication device relaxes measurement reporting.

14. The method according to any one of claims 1 to 13, wherein The method further includes: The first communication device sends its own capability information, and the capability information is used to indicate the prediction capability of the first communication device.

15. The method according to claim 14, wherein The capability information includes at least one of the following: Whether the first communication device supports the prediction function; Whether the first communication device supports predicting the L1 measurement prediction value; Whether the first communication device supports target cell prediction; Whether the first communication device supports candidate cell prediction; Whether the first communication device supports the prediction of the cell group to which the candidate cell belongs; Whether the first communication device supports the second duration prediction; Whether the first communication device supports informing the target cell indication prediction.

16. The method according to claim 14 or 15, wherein, The method further includes: The first communication device receives a first indication, and the first indication is used to indicate whether to allow the first communication device to execute the prediction capability reported by it.

17. A communication method, including: The second communication device receives first information, and the first information includes first prediction information related to handover, and the first prediction information is information predicted based on the actual measurement information of the first communication device.

18. The method according to claim 17, wherein, The first prediction information includes measurement prediction information, and the measurement prediction information includes prediction information of one or more measurement time points after the current moment.

19. The method according to claim 18, wherein The measurement prediction information is layer 1 measurement prediction information, and the duration between two adjacent measurement time points among the multiple measurement time points is less than or equal to the measurement period of layer 1 measurement.

20. The method according to any one of claims 17 to 19, wherein The first information further includes candidate cell information.

21. The method according to any one of claims 17 to 20, wherein The method further includes: The second communication device sends second information, and the second information includes second prediction information related to handover determined by the second communication device according to the first prediction information.

22. The method according to claim 21, wherein, The second prediction information includes at least one of the following: Cell handover command, used to indicate that the first communication device performs a cell handover; First duration, used to indicate that the first communication device performs a cell handover according to the first duration.

23. The method according to claim 21 or 22, wherein The method further includes: The second communication device sends a second information update indication, and the second information update indication is used to update the second information.

24. The method according to claim 23, wherein, The second information update indication includes at least one of the following: Updated cell handover command, used to replace the cell handover command in the second information; Updated first duration, used to replace the first duration in the second information; Cancel cell handover command, used to indicate that the first communication device cancels the cell handover.

25. The method according to claim 17, wherein The first prediction information includes at least one of the following: Target cell information, used to identify the cell to which the first communication device needs to switch; Candidate cell information, used to identify the cell to which the first communication device may switch; The second time duration, which is used to inform the second communication device that the first communication device will perform a cell handover after the second time duration; The target cell indication, which is used to instruct the second communication device to notify the target cell to prepare for a cell handover; The beam indication, which is used to inform the second communication device of the beam for transmitting the uplink message and / or the beam recommended for the target cell to adopt.

26. The method according to claim 25, wherein, The method further includes: After receiving the first information, the second communication device sends a notification message to the target cell corresponding to the target cell information, and the notification message is used to notify the target cell to immediately start or start after the second time duration expires to send dynamic authorization through the physical downlink control channel PDCCH or detect whether there is uplink data in the preconfigured configured authorization; or After receiving the first information, the second communication device sends a notification message to the candidate cell corresponding to the candidate cell information, and the notification message is used to notify the candidate cell to immediately start or start after the second time duration expires to send dynamic authorization through the physical downlink control channel PDCCH or detect whether there is uplink data in the preconfigured configured authorization.

27. The method according to any one of claims 17 to 26, wherein, The method further includes: The second communication device sends configuration information, and the configuration information is used to instruct the first communication device to perform L1 measurement relaxation.

28. The method according to claim 27, wherein, The configuration information includes at least one of the following: The target cell information, which is used to identify the cell to which the first communication device needs to hand over; The candidate cell information, which is used to identify the cell to which the first communication device may hand over; The second time window, which is used to instruct the first communication device to predict the L1 measurement prediction value within the second time window after the current moment; The number of prediction time points, which is used to instruct the first communication device to predict the L1 measurement prediction value according to the number of prediction time points after the current moment; The relaxation reporting indication, which is used to instruct the first communication device to relax measurement reporting.

29. The method according to any one of claims 17 to 28, wherein The method further includes: The second communication device receives the capability information from the first communication device, and the capability information is used to indicate the prediction capability of the first communication device.

30. The method according to claim 29, wherein, The capability information includes at least one of the following: Whether the first communication device supports the prediction function; Whether the first communication device supports predicting the L1 measurement prediction value; Whether the first communication device supports target cell prediction; Whether the first communication device supports candidate cell prediction; Whether the first communication device supports candidate cell belonging cell group prediction; Whether the first communication device supports the second time duration prediction; Whether the first communication device supports the target cell indication prediction.

31. The method according to claim 29 or 30, wherein The method further includes: The second communication device sends a first indication, and the first indication is used to indicate whether to allow the first communication device to execute the reported prediction capability.

32. A first communication device, comprising: A sending unit, which is used to send first information, and the first information includes first prediction information related to handover, and the first prediction information is information predicted based on the actual measurement information of the first communication device.

33. The first communication device according to claim 32, wherein, The first prediction information includes measurement prediction information, and the measurement prediction information includes prediction information of one or more measurement time points after the current moment.

34. The first communication device according to claim 33, wherein, The measurement prediction information is layer 1 measurement prediction information, and the duration between two adjacent measurement time points among the multiple measurement time points is less than or equal to the measurement period of layer 1 measurement.

35. The first communication device according to any one of claims 32 to 34, wherein, The first information further includes candidate cell information.

36. The first communication device according to any one of claims 32 to 35, wherein, The first communication device further includes: a receiving unit, configured to receive second information, where the second information includes second prediction information related to handover determined by the second communication device according to the first prediction information.

37. The first communication device according to claim 36, wherein, The second prediction information includes at least one of the following: a cell handover command, used to instruct the first communication device to perform a cell handover; a first duration, used to instruct the first communication device to perform a cell handover according to the first duration.

38. The first communication device according to claim 36 or 37, wherein, The receiving unit is further configured to receive a second information update indication, where the second information update indication is used to update the second information.

39. The first communication device according to claim 38, wherein, The second information update indication includes at least one of the following: an updated cell handover command, used to replace the cell handover command in the second information; an updated first duration, used to replace the first duration in the second information; a cancel cell handover command, used to instruct the first communication device to cancel the cell handover.

40. The first communication device according to claim 32, wherein, The first prediction information includes at least one of the following: target cell information, used to identify the cell to which the first communication device needs to hand over; candidate cell information, used to identify the cell to which the first communication device may hand over; a second duration, used to inform the second communication device that the first communication device performs a cell handover according to the second duration; an inform target cell indication, used to instruct the second communication device to notify the target cell to prepare for a cell handover; a beam indication, used to inform the second communication device of the beam for transmitting an uplink message and / or the beam recommended for the target cell to adopt.

41. The first communication device according to claim 40, wherein, The sending module is configured to send the first information under a first condition, where the first condition is related to the handover trigger condition and / or prediction result of the first communication device.

42. The first communication device according to claim 41, wherein, The first condition includes at least one of the following: The first communication device reaches the handover trigger condition at the current moment; The first communication device reaches the handover trigger condition within a first time window after the current moment; The probability that the first communication device reaches the handover trigger condition within a first time window after the current moment is higher than a preset threshold; The first communication device needs to update the first information according to the prediction result.

43. The first communication device according to any one of claims 32 to 42, wherein, The receiving unit is further configured to receive configuration information, where the configuration information is used to instruct the first communication device to perform L1 measurement relaxation.

44. The first communication device according to claim 43, wherein, The configuration information includes at least one of the following: target cell information, used to identify the cell to which the first communication device needs to hand over; candidate cell information, used to identify the cell to which the first communication device may hand over; a second time window, used to instruct the first communication device to predict the L1 measurement prediction value within the second time window after the current moment; the number of prediction time points, used to instruct the first communication device to predict the L1 measurement prediction value according to the number of prediction time points after the current moment; a relaxation reporting indication, used to instruct the first communication device to relax measurement reporting.

45. The first communication device according to any one of claims 32 to 44, wherein, The sending unit is further configured to send its own capability information, and the capability information is used to indicate the prediction capability of the first communication device.

46. The first communication device according to claim 45, wherein, The capability information includes at least one of the following: Whether the first communication device supports the prediction function; Whether the first communication device supports predicting the predicted value of L1 measurement; Whether the first communication device supports target cell prediction; Whether the first communication device supports candidate cell prediction; Whether the first communication device supports predicting the cell group to which the candidate cell belongs; Whether the first communication device supports predicting the second duration; Whether the first communication device supports informing the target cell indication prediction.

47. The first communication device according to claim 45 or 46, wherein, The receiving unit is further configured to receive a first indication, and the first indication is used to indicate whether to allow the first communication device to execute the prediction capability reported by it.

48. A second communication device, comprising: A receiving unit, configured to receive first information, where the first information includes first prediction information related to handover, and the first prediction information is information predicted based on the actual measurement information of the first communication device.

49. The second communication device according to claim 48, wherein, The first prediction information includes measurement prediction information, and the measurement prediction information includes prediction information for one or more measurement time points after the current moment.

50. The second communication device according to claim 49, wherein, The measurement prediction information is layer 1 measurement prediction information, and the duration between two adjacent measurement time points among the multiple measurement time points is less than or equal to the measurement period of layer 1 measurement.

51. The second communication device according to any one of claims 48 to 50, wherein, The first information further includes candidate cell information.

52. The second communication device according to any one of claims 48 to 51, wherein, The second communication device further includes: A sending unit, configured to send second information, where the second information includes second prediction information related to handover determined by the second communication device according to the first prediction information.

53. The second communication device according to claim 52, wherein, The second prediction information includes at least one of the following: A cell handover command, used to instruct the first communication device to perform cell handover; A first duration, used to instruct the first communication device to perform cell handover according to the first duration.

54. The second communication device according to claim 52 or 53, wherein, The sending unit is further configured for a second information update indication, and the second information update indication is used to update the second information.

55. The second communication device according to claim 54, wherein, The second information update indication includes at least one of the following: An updated cell handover command, used to replace the cell handover command in the second information; An updated first duration, used to replace the first duration in the second information; A cancel cell handover command, used to instruct the first communication device to cancel cell handover.

56. The second communication device according to claim 48, wherein, The first prediction information includes at least one of the following: Target cell information, used to identify the cell to which the first communication device needs to handover; Candidate cell information, used to identify the cell to which the first communication device may handover; A second duration, used to inform the second communication device that the first communication device performs cell handover after the second duration; An informing target cell indication, used to instruct the second communication device to notify the target cell to prepare for cell handover; A beam indication, used to inform the second communication device of the beam for transmitting the uplink message and / or the beam recommended for the target cell to adopt.

57. The second communication device according to claim 56, wherein, The sending unit is further configured to cause the second communication device to send a notification message to the target cell corresponding to the target cell information after receiving the first information, where the notification message is used to notify the target cell to immediately start or start after the expiration of the second duration to send a dynamic grant through a physical downlink control channel (PDCCH) or detect whether there is uplink data in a preconfigured configured grant; or The second communication device sends a notification message to the candidate cell corresponding to the candidate cell information after receiving the first information, where the notification message is used to notify the candidate cell to immediately start or start after the expiration of the second duration to send a dynamic grant through a physical downlink control channel (PDCCH) or detect whether there is uplink data in a preconfigured configured grant.

58. The second communication device according to any one of claims 48 to 57, wherein, The sending unit is further configured to send configuration information, where the configuration information is used to instruct the first communication device to perform L1 measurement relaxation.

59. The second communication device according to claim 58, wherein, The configuration information includes at least one of the following:[[]] Target cell information, which is used to identify the cell to which the first communication device needs to hand over; Candidate cell information, which is used to identify the cell to which the first communication device may hand over; Second time window, which is used to instruct the first communication device to predict the L1 measurement prediction value within the second time window after the current moment; Number of prediction time points, which is used to instruct the first communication device to predict the L1 measurement prediction value according to the number of prediction time points after the current moment; Relaxed reporting indication, which is used to instruct the first communication device to relax measurement reporting.

60. The second communication device according to any one of claims 17 to 28, wherein, The receiving unit is further configured to receive capability information from the first communication device, where the capability information is used to indicate the prediction capability of the first communication device.

61. The second communication device according to claim 60, wherein, The capability information includes at least one of the following:[[]] Whether the first communication device supports the prediction function; Whether the first communication device supports predicting the L1 measurement prediction value; Whether the first communication device supports target cell prediction; Whether the first communication device supports candidate cell prediction; Whether the first communication device supports candidate cell belonging cell group prediction; Whether the first communication device supports second duration prediction; Whether the first communication device supports notifying the target cell indication prediction.

62. The second communication device according to claim 60 or 61, wherein, The sending unit is further configured to send a first indication, where the first indication is used to indicate whether to allow the first communication device to execute the reported prediction capability.

63. A communication device, comprising: A transceiver, a processor, and a memory, where the memory is used to store a computer program, the transceiver is used to communicate with other devices, and the processor is used to call and run the computer program stored in the memory, so that the communication device executes the method according to any one of claims 1 to 31.

64. A chip, comprising: A processor, which is used to call and run a computer program from the memory, so that the device equipped with the chip executes the method according to any one of claims 1 to 31. A computer-readable storage medium, which is used to store a computer program, and when the computer program is run by a device, the device executes the method according to any one of claims 1 to 31.

66. A computer program product comprising computer program instructions that cause a computer to perform the method according to any one of claims 1 to 31.

67. A computer program that causes a computer to perform the method according to any one of claims 1 to 31.

68. A communication system comprising: A first communication device for performing the method according to any one of claims 1 to 16; A second communication device for performing the method according to any one of claims 17 to 31.

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