Communication method and communication apparatus

Abstract

The application provides a communication method and a communication device, and applies to the technical field of communication. In the embodiment of the application, a new random access occasion configuration method is designed, or a random access parameter set is introduced, which is used for configuring a first RO cluster. The network device can centrally process the access of one or more potential UEs in a time window, thereby reducing the frequent wake-up of the network device, and the network device can obtain a longer continuous sleep time. Moreover, for the scenario of performing cross-cell switching or redirection by the UE, by introducing exclusive access parameter information (or the configuration of the second RO cluster), DCI blind detection is not required, and the downlink blind detection power consumption of the UE can be reduced.

Description

Technical Field

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

[0002] The 3rd Generation Partnership Project (3GPP) provides a random access procedure for 5G New Radio (NR). In the existing random access procedure, the UE can send an access request at the random access occasion (RO).

[0003] With the development of communication technology, the network side can provide greater bandwidth and more transmission channels, but this also results in greater energy consumption. To reduce network energy consumption, network energy saving has become a key topic of discussion. However, under the current RO configuration scheme, network devices need to be frequently woken up to handle UE access requests, causing severe fragmentation of network device sleep time. Summary of the Invention

[0004] In view of this, this application provides a communication method, communication device, chip system, computer-readable storage medium, computer program product, and communication system. By introducing RO clusters, network devices can centrally process UE access requests within the window corresponding to the RO clusters, without needing to wake up the network devices in each SSB cycle, thereby enabling the network devices to obtain a longer continuous sleep time.

[0005] In a first aspect, a communication method is provided, which can be executed by a user equipment (UE), or by a component configured in the UE (such as a circuit, chip, or chip system), or by a logic module or software capable of implementing all or part of the UE's functions. This application does not limit this method.

[0006] Specifically, the method includes: a UE receiving a first signaling from a network device, the first signaling including first indication information, the first indication information being used to indicate the configuration for activating a first RO cluster; the first RO cluster including one or more ROs arranged in the time domain; the starting time domain position of the window corresponding to the first RO cluster being determined based on a first offset, the first offset being associated with the end time domain position of an SSB, the end time domain position of an SSB referring to the end time domain position of the last SSB among multiple SSBs sent by the network device in an SSB cycle; the window corresponding to the first RO cluster being located in the last SSB cycle among N SSB cycles; N being an integer greater than 1; receiving a first SSB from the network device; determining the time domain position corresponding to the first RO cluster based on the first indication information and the first SSB; and sending a random access preamble to the network device in the first RO resource, the first RO resource being determined in the first RO cluster.

[0007] Based on the above technical solution, by introducing the configuration of the first RO cluster, the network device sends a first signaling to the UE to activate the configuration parameter set of the first RO cluster. The UE activates the configuration of the first RO cluster through the first signaling and determines the specific time-domain location of the first RO cluster, thereby selecting RO resources for access within the first RO cluster. This allows the network device to centrally process the access of multiple potential UEs within the time window corresponding to the first RO cluster. In other words, the network device does not need to wake up in every SSB cycle, but only once every few SSB cycles, thus reducing the number of wake-up calls and increasing the sleep time of the network device.

[0008] Of course, the UE will obtain the configuration or parameter set related to the first RO cluster before determining the time domain location of the first RO cluster.

[0009] Optionally, the method further includes: the UE receiving a configuration message, the configuration message including burst parameter information for random access, the burst parameter information being used to determine the first RO cluster; the UE determining the time domain location corresponding to the first RO cluster according to the first indication information and the first SSB, including: determining the time domain location corresponding to the first RO cluster according to the first indication information, the first SSB and the burst parameter information.

[0010] Optionally, the configuration message can be a system broadcast message, a paging message, or a broadcast signaling message, etc.

[0011] It should be noted that after receiving burst parameter information, the UE can store the burst parameter information in the underlying context after parsing it. In other words, the parsed burst parameter information is in a suspended state. This suspended state can be understood as the UE temporarily not using the parsed burst parameter information or not taking effect on the configuration of the first RO cluster, maintaining the original periodic RO mechanism. Instead, it will only use the parsed burst parameter information or take effect on the configuration of the first RO cluster after being activated by the first indication information issued by the network device (such as the first indication information carried in DCI signaling). This preserves the compatibility of older equipment.

[0012] In one possible implementation, the burst parameter information includes one or more of the following: the first offset, the first effective duration, and the number of ROs included in the first RO cluster; wherein, the first offset refers to the offset between the starting time domain position of the window corresponding to the first RO cluster and the ending time domain position of the first SSB; the first effective duration refers to the effective duration of the first RO cluster (e.g., represented as validity-Timer).

[0013] Optionally, the burst parameter information may also include one or more of the following: the timing of the activation after the UE receives the first signaling; the preamble format.

[0014] Optionally, the first validity period can be non-periodic. The first validity period can be configured in one-shot mode. After the first RO cluster configuration is activated once according to the first validity period, it automatically falls back to the original RO resources (or the mode of existing RO resources), without the network device needing to issue DCI to shut down or deactivate the first RO cluster configuration again, which can further reduce signaling overhead.

[0015] In one possible implementation, the first offset is determined based on one or more of the following parameters: the transmission duration of system information, the processing duration of system information, and first delay information; the first delay information includes transmission delay and / or switching delay.

[0016] In one possible implementation, the first signaling is DCI signaling, and the first indication information is the short message field in the DCI signaling; when the value of the short message field is a first value, it indicates that the configuration of the first RO cluster is activated.

[0017] In one possible implementation, the UE determines the temporal domain position of the first RO cluster by: activating the burst parameter information corresponding to the first RO cluster according to the first indication information; determining the temporal domain position at the end of the SSB according to the received first SSB; and determining the starting temporal domain position and the ending temporal domain position of the first RO cluster based on the temporal domain position at the end of the SSB and the burst parameter information. The starting time domain position of the first RO cluster is determined based on one or more of the following: the ending time domain position of the SSB, the first effective duration, the first offset, and the SSB period.

[0018] For example, the starting time-domain position of the first RO cluster satisfies the following formula: ; in, Indicates the starting time-domain position of the first RO cluster. , This is the end-of-segment field location for the SSB. Indicates the first valid duration. Indicates the SSB period. This indicates the first offset.

[0019] Optionally, the method further includes: automatically falling back to the first RO mode after the first RO cluster exceeds its valid duration, where the first RO mode refers to the default periodic RO mode. This eliminates the need for network devices to issue commands again to instruct the fallback, saving signaling overhead.

[0020] This application embodiment can also be used for handover procedures. Optionally, the network device is a source network device; the method further includes: the UE receiving a second signaling, the second signaling including dedicated burst parameter information, the dedicated burst parameter information being used to configure a second RO cluster; activating the dedicated burst parameter information according to the second signaling, and sending a completion message to the source network device; receiving a second SSB from the target network device; determining the second RO cluster according to the second SSB and the dedicated burst parameter information; and sending a dedicated preamble to the target network device based on the second RO resource, the second RO resource being the RO resource in the second RO cluster.

[0021] In other words, a new unicast parameter set for handover has been added to the handover process. This means that the RO configuration information is sent to a specific UE via unicast, so that the UE does not need to perform DCI blind detection, which can save the UE's power consumption and eliminate the latency caused by DCI blind detection.

[0022] Optionally, the starting time domain position of the second RO cluster is determined based on one or more of the following: a second offset, second delay information, and the ending time domain position of the second SSB; wherein the second delay information includes one or more of the following: the switching time between the receiver and transmitter of the device, the signal transmission delay, and the signal processing delay.

[0023] Optionally, the dedicated burst parameter information includes at least one or more of the following: preamble index, target cell SSB index, second offset, and second effective duration; wherein, the preamble index is used to identify the dedicated preamble allocated to the UE; the second offset is the offset between the start time domain position of the second RO cluster and the end time domain position corresponding to the target SSB; and the second effective duration is the effective duration of the dedicated burst parameter information.

[0024] Because a dedicated preamble index is configured for each UE, the UE will not collide with other UEs during access (collision-free), thus improving the access success rate.

[0025] Optionally, the dedicated burst parameter information may also include one or more of the following: the window length of RO, the frequency domain start position, and the frequency division multiplexing scaling factor.

[0026] Optionally, the method further includes: receiving a random access response message from the target network device; and deleting information related to the second RO cluster. In this way, after receiving the random access response message, the UE will automatically delete or clean up information related to the second RO cluster in the context, or in other words, destroy (or release) the resources of the second RO cluster, thereby reducing resource consumption.

[0027] Secondly, a communication method is provided, which can be executed by a network device, or by a component (such as a circuit, chip, or chip system) configured in the network device, or by a logic module or software capable of implementing all or part of the functions of the network device. This application does not limit this method.

[0028] Specifically, the method includes: a network device sending a first signaling message, the first signaling message including first indication information, the first indication information being used to indicate the configuration for activating a first RO cluster; the first RO cluster including one or more ROs arranged in the time domain; the starting time domain position of the window corresponding to the first RO cluster being determined according to a first offset, the first offset being associated with the end time domain position of an SSB, the end time domain position of an SSB referring to the end time domain position of the last SSB among multiple SSBs sent by the network device in an SSB cycle; the window corresponding to the first RO cluster being located in the last SSB cycle among N SSB cycles; N being an integer greater than 1; sending a first SSB; and receiving a random access preamble on a first RO resource, the first RO resource being determined in the first RO cluster.

[0029] Based on the above technical solution, by introducing the configuration of the first RO cluster, the network device sends a first signaling to the UE to activate the configuration parameter set of the first RO cluster. This allows the network device to centrally process the access of multiple potential UEs within the time window corresponding to the first RO cluster. In other words, the network device does not need to wake up in every SSB cycle, but only once every few SSB cycles, thereby reducing the number of wake-ups and increasing the sleep time of the network device.

[0030] It is understood that the second aspect is the implementation on the network device side corresponding to the first aspect. Therefore, the explanation of some terms or the description of technical effects can be referred to the first aspect. For the sake of brevity, no detailed explanation will be given below.

[0031] Optionally, the method further includes: a network device sending a configuration message, the configuration message including burst parameter information for random access, the burst parameter information being used to determine the first RO cluster.

[0032] In one possible implementation, the burst parameter information includes one or more of the following: the first offset, the first effective duration, and the number of ROs included in the first RO cluster; wherein, the first offset refers to the offset between the starting time domain position of the window corresponding to the first RO cluster and the ending time domain position of the first SSB; the first effective duration refers to the effective duration of the first RO cluster.

[0033] In one possible implementation, the burst parameter information may also include one or more of the following: the timing of the activation after the UE receives the first signaling; the preamble format.

[0034] In one possible implementation, the first signaling is DCI signaling, and the first indication information is the short message field in the DCI signaling; when the value of the short message field is a first value, it indicates that the configuration of the first RO cluster is activated.

[0035] In one possible implementation, the starting time domain position of the first RO cluster is determined based on one or more of the following: the ending time domain position of the SSB, the first effective duration, the first offset, and the SSB period.

[0036] In one possible implementation, the network device is a source network device; the method further includes: interacting with a target network device to obtain burst access resources requested for the UE; sending a second signaling message to the UE, the second signaling message including dedicated burst parameter information, the dedicated burst parameter information being used to configure a second RO cluster; and receiving a completion message from the UE, the completion message being used to notify the RRC reconfiguration is complete.

[0037] In one possible implementation, the starting time-domain position of the second RO cluster is determined based on one or more of the following: a second offset, second delay information, and the ending time-domain position of the second SSB; wherein the second delay information includes one or more of the following: the switching time between the receiver and transmitter of the device, the signal transmission delay, and the signal processing delay.

[0038] In one possible implementation, the dedicated burst parameter information includes at least one or more of the following: a preamble index, an SSB index of the target cell, a second offset, and a second effective duration; wherein, the preamble index is used to identify the dedicated preamble allocated to the UE; the second offset is the offset between the starting time domain position of the second RO cluster and the ending time domain position corresponding to the target SSB; and the second effective duration is the effective duration of the dedicated burst parameter information.

[0039] In one possible implementation, the dedicated burst parameter information may also include one or more of the following: the window length of RO, the frequency domain start position, and the frequency division multiplexing scaling factor.

[0040] Thirdly, a communication method is provided, which can be executed by a source network device, or by a component (such as a circuit, chip, or chip system) configured in the source network device, or by a logic module or software capable of implementing all or part of the functions of the source network device. This application does not limit this method.

[0041] The method includes: the source network device interacting (or negotiating) with the target network device to obtain burst access resources requested for the UE; sending a second signaling message to the UE, the second signaling message including dedicated burst parameter information, the dedicated burst parameter information being used to configure a second RO cluster; and receiving a completion message from the UE, the completion message being used to notify the RRC reconfiguration is complete.

[0042] Based on the above technical solution, the source network device and the target network device negotiate to apply for dedicated access resources for the UE; by adding a parameter set of the second RO cluster (i.e. dedicated burst parameter information), for example, assigning a dedicated preamble to the UE and sending the dedicated burst parameter information to the UE for fast handover, the UE no longer needs to blindly detect DCI, saving the latency or power consumption caused by the UE blindly detecting DCI.

[0043] In one possible implementation, the starting time-domain position of the second RO cluster is determined based on one or more of the following: a second offset, second delay information, and the ending time-domain position of the second SSB; wherein the second delay information includes one or more of the following: the switching time between the receiver and transmitter of the device, the signal transmission delay, and the signal processing delay.

[0044] In one possible implementation, the dedicated burst parameter information includes at least one or more of the following: a preamble index, an SSB index of the target cell, a second offset, and a second effective duration; wherein, the preamble index is used to identify the dedicated preamble allocated to the UE; the second offset is the offset between the starting time domain position of the second RO cluster and the ending time domain position corresponding to the target SSB; and the second effective duration is the effective duration of the dedicated burst parameter information.

[0045] In one possible implementation, the dedicated burst parameter information may also include one or more of the following: the window length of RO, the frequency domain start position, and the frequency division multiplexing scaling factor.

[0046] Fourthly, a communication method is provided, which may be executed by a target network device, or by a component (such as a circuit, chip, or chip system) configured in the target network device, or by a logic module or software capable of implementing all or part of the functions of the target network device. This application does not limit this aspect.

[0047] The method includes: the target network device negotiating with the source network device to allocate dedicated access resources (such as allocating a dedicated preamble) for the UE; sending a second SSB to the UE; and receiving a dedicated preamble sent by the UE based on a second RO resource, wherein the second RO resource is an RO resource in a second RO cluster.

[0048] Based on the above technical solution, by adding a parameter set for the second RO cluster, such as assigning a dedicated preamble to the UE for fast handover, the latency or power consumption caused by UE blind detection DCI is eliminated.

[0049] In one possible implementation, the starting time-domain position of the second RO cluster is determined based on one or more of the following: a second offset, second delay information, and the ending time-domain position of the second SSB; wherein the second delay information includes one or more of the following: the switching time between the receiver and transmitter of the device, the signal transmission delay, and the signal processing delay.

[0050] In one possible implementation, the dedicated burst parameter information includes at least one or more of the following: a preamble index, an SSB index of the target cell, a second offset, and a second effective duration; wherein, the preamble index is used to identify the dedicated preamble allocated to the UE; the second offset is the offset between the starting time domain position of the second RO cluster and the ending time domain position corresponding to the target SSB; and the second effective duration is the effective duration of the dedicated burst parameter information.

[0051] In one possible implementation, the dedicated burst parameter information may also include one or more of the following: the window length of RO, the frequency domain start position, and the frequency division multiplexing scaling factor.

[0052] Optionally, the method further includes: the target network device sending a random access response message to the UE; and deleting information related to the second RO cluster. Therefore, after sending the random access response message, the target network device will automatically delete or clean up information related to the second RO cluster in the context, or in other words, destroy (or release) the resources of the second RO cluster, thereby reducing resource consumption.

[0053] Fifthly, a communication apparatus is provided, comprising modules or units for performing the method in any possible implementation of the first aspect described above.

[0054] In one design, the communication device may include modules that perform the methods / operations / steps / actions described in the foregoing aspects. These modules may be hardware circuits, software, or a combination of hardware circuits and software.

[0055] In one design, the communication device is a communication chip, which may include an output circuit or interface for transmitting information or data, and an input circuit or interface for receiving information or data.

[0056] In another design, the communication device is a communication equipment, which may include a transmitter for sending information or data and a receiver for receiving information or data.

[0057] In another design, the communication device is used to perform the method in any possible implementation of the first aspect described above. The communication device may be configured in the UE, or the communication device itself may be the UE.

[0058] A sixth aspect provides a communication apparatus comprising modules or units for performing the methods in any of the possible implementations of the second, third, or fourth aspects described above.

[0059] In one design, the communication device may include modules that perform the methods / operations / steps / actions described in the foregoing aspects. These modules may be hardware circuits, software, or a combination of hardware circuits and software.

[0060] In one design, the communication device is a communication chip, which may include an output circuit or interface for transmitting information or data, and an input circuit or interface for receiving information or data.

[0061] In another design, the communication device is a communication equipment, which may include a transmitter for sending information or data and a receiver for receiving information or data.

[0062] In another design, the communication device is used to perform the methods in any possible implementation of the second, third, or fourth aspect described above. The communication device may be configured in the network device described above, or the communication device itself may be a network device.

[0063] Alternatively, the network device may be a satellite, or an access network device (e.g., a gNB or a NB), or a network element in the core network.

[0064] A seventh aspect provides a communication device including a processor. The processor is coupled to a memory and can be used to execute instructions or data in the memory to implement the method in any possible implementation of the first aspect. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled to the communication interface.

[0065] In one implementation, the communication interface may be a transceiver, or an input / output interface.

[0066] In another implementation, the communication device is a chip configured in the UE. When the communication device is a chip configured in the UE, the communication interface can be an input / output interface.

[0067] Eighthly, a communication device is provided, including a processor. The processor is coupled to a memory and can be used to execute instructions or data in the memory to implement the methods in any of the possible implementations of the second, third, or fourth aspects described above. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled to the communication interface.

[0068] In one implementation, the communication interface may be a transceiver, or an input / output interface.

[0069] In another implementation, the communication device is a chip configured in a network device. When the communication device is a chip configured in a network device, the communication interface can be an input / output interface.

[0070] A ninth aspect provides a processor, comprising: an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive signals through the input circuit and transmit signals through the output circuit, causing the processor to execute a method in any possible implementation of any aspect.

[0071] In specific implementation, the processor can be one or more chips, the input circuit can be input pins, the output circuit can be output pins, and the processing circuit can be transistors, gate circuits, flip-flops, and various logic circuits. The input signal received by the input circuit can be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit can be, for example, but not limited to, output to and transmitted by a transmitter. Furthermore, the input circuit and the output circuit can be the same circuit, which is used as both the input circuit and the output circuit at different times. This application does not limit the specific implementation of the processor and various circuits.

[0072] In a tenth aspect, a communication device is provided, including a processor and a memory. The processor is configured to read instructions stored in the memory, receive signals via a receiver, and transmit signals via a transmitter to execute the method in any possible implementation of any of the preceding aspects.

[0073] Optionally, the processor may be one or more, and the memory may be one or more.

[0074] Optionally, the memory may be integrated with the processor, or the memory may be separated from the processor.

[0075] In the specific implementation process, the memory can be a non-transitory memory, such as read-only memory (ROM), which can be integrated with the processor on the same chip or set on different chips. The embodiments of this application do not limit the type of memory or the way the memory and processor are set.

[0076] It should be understood that the relevant data interaction process, such as sending indication information, can be the process of the processor outputting indication information, and receiving capability information can be the process of the processor receiving input capability information. Specifically, the data output by the processor can be sent to the transmitter, and the input data received by the processor can come from the receiver. Here, the transmitter and receiver can be collectively referred to as a transceiver.

[0077] The processing device mentioned in the tenth aspect above can be one or more chips. The processor in the processing device can be implemented in hardware or software. When implemented in hardware, the processor can be a logic circuit, integrated circuit, etc.; when implemented in software, the processor can be a general-purpose processor that reads software code stored in memory. The memory can be integrated into the processor or located outside the processor and exist independently.

[0078] Eleventhly, a computer program product is provided, the computer program product comprising: a computer program (also referred to as code or instructions), which, when the computer program is run, causes a computer to perform a method in any possible implementation of any of the preceding aspects.

[0079] In a twelfth aspect, a computer-readable storage medium is provided that stores a computer program (also referred to as code or instructions) that, when run on a computer, causes the computer to perform the methods in any possible implementation of any of the above aspects.

[0080] In a thirteenth aspect, embodiments of this application provide a chip system including one or more processors for calling and executing instructions stored in memory, causing the methods in any of the above aspects or any possible implementations of the above aspects to be executed. The chip system may be composed of chips or may include chips and other discrete devices.

[0081] The chip system may include output circuits or interfaces for transmitting information or data, and input circuits or interfaces for receiving information or data.

[0082] In a fourteenth aspect, a communication system is provided, including the aforementioned UE and network device. The UE is used to execute any possible implementation of the first aspect. The network device is used to execute any possible implementation of the second aspect.

[0083] Alternatively, it may include the aforementioned UE, source network device, and target network device; the target network device is used to execute the implementation method in the aforementioned fourth aspect; the UE and source network device are used to execute the implementation method related to the handover procedure in the aforementioned aspect.

[0084] Optionally, the communication system may also include other devices that communicate with the UE and / or network devices. Attached Figure Description

[0085] Figure 1 A schematic diagram of a communication system provided in an embodiment of this application; Figure 2 A distribution example diagram of existing RO resources; Figure 3 Example diagram of the communication method provided in the embodiments of this application; Figure 4 This is an example diagram of an RO cluster according to an embodiment of this application; Figure 5 This is another example diagram of the RO cluster in an embodiment of this application; Figure 6 Example diagram of another communication method provided in the embodiments of this application; Figure 7 This is a schematic block diagram of the communication device provided in the embodiments of this application; Figure 8 This is another schematic block diagram of the communication device provided in the embodiments of this application. Detailed Implementation

[0086] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0087] In this application embodiment, "multiple" can be understood as "at least two"; "multiple items" can be understood as "at least two items".

[0088] In the description of this application, unless otherwise stated, " / " indicates that the objects before and after are in an "or" relationship. For example, A / B can represent A or B. "And / or" in this application merely describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone, where A and B can be singular or plural. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple. Additionally, to facilitate a clear description of the technical solutions of the embodiments of this application, the terms "first" and "second" are used in the embodiments of this application to distinguish identical or similar items with essentially the same function and effect. Those skilled in the art will understand that the words "first" and "second" do not limit the quantity or the order of execution, and that the words "first" and "second" do not necessarily imply that they are different.

[0089] This application can be applied to communication systems. Mobile communication systems include, but are not limited to, the following systems: Long Term Evolution (LTE) systems, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) systems, 5th Generation (5G) mobile communication systems or new radio access technology (NR), 6th Generation (6G) mobile communication systems and future mobile communication systems, vehicle-to-other devices (V2X), where V2X can include vehicle-to-network (V2N), vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P), etc., Long Term Evolution-Vehicle (LTE-V) technology for vehicle-to-everything (V2V), vehicle-to-everything (V2X), machine-type communication (MTC), Internet of Things (IoT), and Long Term Evolution-Vehicle (LTE-V) technology for machine-to-machine communication. Evolution-machine (LTE-M), machine-to-machine (M2M), etc. Among them, 5G mobile communication systems can include non-standalone (NSA) and / or standalone (SA) networks.

[0090] This application can also be applied to systems that integrate mobile communication systems and satellite communication systems. Satellite communication systems include, but are not limited to, non-terrestrial network (NTN) systems such as high altitude platform station (HAPS) communication, for example, the Global Navigation Satellite System (GNSS). Optionally, satellite communication systems include geostationary orbit (GEO) satellites and non-geostationary earth orbit (NGEO) satellites; or various terrestrial network (TN) systems.

[0091] Figure 1 This is a schematic diagram of a communication system 100 used in an embodiment of this application. The communication system 100 may include network devices, such as... Figure 1 The network device 110 is shown. The communication system 100 may also include terminal devices, such as... Figure 1 The terminal device 120 shown. The network device 110 and the terminal device 120 can communicate via a wireless link.

[0092] Figure 1 An exemplary network device 110 and a terminal device 120 are shown. Optionally, the communication system 100 may also include multiple network devices and / or multiple terminal devices.

[0093] The network equipment in this application can be network-side equipment such as access network equipment and core network equipment. Access network equipment is sometimes also called access node. Access network equipment has wireless transceiver capabilities and is used to communicate with terminals. Access network equipment includes, but is not limited to, base stations, evolved NodeBs (eNodeBs), transmission reception points (TRPs) in the above-mentioned communication systems, next-generation NodeBs (gNBs) in 5G mobile communication systems, advanced / AI NodeBs (aNBs) in 6G mobile communication systems, access network equipment or modules of access network equipment in open RAN (ORAN) systems, satellites in NTN communication systems, base stations in future mobile communication systems, or access nodes in WiFi systems. Access network equipment can also be modules or units that can implement some of the functions of a base station. Access network equipment can be macro base stations, micro base stations or indoor stations, relay nodes or donor nodes, or wireless controllers in cloud radio access network (CRAN) scenarios. Optionally, access network equipment can also be servers, wearable devices, or vehicle-mounted equipment, etc. For example, the access network equipment in vehicle-to-everything (V2X) technology can be a roadside unit (RSU). Multiple access network devices in a communication system can be base stations of the same type or different types. Base stations can communicate with terminals directly or via relay stations. Terminals can communicate with multiple base stations using different access technologies. The embodiments of this application do not limit the specific technology or equipment form used in the access network equipment. In this application, access network equipment or core network equipment can be simply referred to as network equipment.

[0094] In this application, the means for implementing the functions of a network device can be a network device itself, or a means capable of supporting the network device in implementing those functions, such as a processor, circuit, chip, or chip system. This means can be installed in or connected to the network device. In the technical solutions provided in this application, the example of a network device being used to implement the functions of a network device is used to describe the technical solutions provided in this application.

[0095] The terminal device in this application can be a wireless terminal device capable of receiving network device scheduling and instruction information. The wireless terminal device can be a device providing voice and / or data connectivity to a user, a handheld device with wireless connectivity, or other processing devices connected to a wireless modem. For example, the terminal device can communicate with one or more core networks or the Internet via a radio access network (RAN). The terminal device can also be referred to as a terminal, user equipment (UE), mobile station, mobile terminal, etc. Terminal devices can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IoT), ultra-reliable low-latency communication (URLLC), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, smart cities, or satellite communication, etc. The terminal can be a mobile phone, tablet computer, computer with wireless transceiver capabilities, wearable device, vehicle, aircraft (such as drone, helicopter, airplane), hot air balloon, ship, robot, robotic arm, or smart home device, etc. The embodiments of this application do not limit the form of the terminal device.

[0096] In this application, the apparatus for implementing the functions of a terminal device can be the terminal device itself, or any apparatus capable of supporting the terminal device in implementing those functions, such as a processor, circuit, chip, or chip system. This apparatus can be installed in or connected to the terminal device. In the technical solutions provided in this application, the example of a terminal device being used to implement the functions of a terminal device is used to describe the technical solutions provided in this application.

[0097] Access network equipment and / or terminal equipment can be fixed or mobile. They can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; on water; or in the air on aircraft, balloons, and satellites. This application does not limit the application scenarios of the access network equipment and terminal equipment. They can be deployed in the same or different scenarios; for example, both can be deployed on land simultaneously; or the access network equipment can be deployed on land while the terminal equipment is deployed on water, etc., and so on.

[0098] In practical applications, multiple network devices can collaborate to assist terminals in achieving wireless access, with different network devices each implementing a portion of the base station's functions. For example, network devices can be central units (CUs), distributed units (DUs), CUs (control planes, CPs), CUs (user planes, UPs), or radio units (RUs), etc. CUs and DUs can be set up separately or included in the same network element, such as a baseband unit (BBU). RUs can be included in radio frequency equipment or radio frequency units, such as remote radio units (RRUs), active antenna units (AAUs), or remote radio heads (RRHs).

[0099] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, in an ORAN system, CU can also be called O-CU (Open CU), DU can also be called O-DU, CU-CP can also be called O-CU-CP, CU-UP can also be called O-CU-UP, and RU can also be called O-RU. Any of the units among CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented through software modules, hardware modules, or a combination of software and hardware modules. CU (or CU-CP and CU-UP), DU, and RU can implement different protocol layer functions.

[0100] To facilitate understanding of the embodiments of this application, the terminology used in this application will be briefly explained first. For example, the explanation of some terms can also be found in the interpretation of the 3rd Generation Partnership Project (3GPP) standard protocol.

[0101] 1. Random access (RA) The random access procedure refers to the process from when the UE sends a random access preamble (or simply random access code) and attempts to access the network until a basic signaling connection is established with the network. Random access includes contention-based random access procedure (CBRA) and contention-free random access procedure (CFRA). A contention-based random access procedure means that the network device does not allocate a dedicated preamble and / or physical random access channel (PRACH) resource to the UE; instead, the UE randomly selects a preamble from a specified range and initiates random access. A contention-free random access procedure means that the UE initiates random access using a specified preamble on a specified PRACH resource according to the network device's instructions.

[0102] Depending on the steps involved in exchanging information, random access can be divided into four-step random access channel (4-step RACH) and two-step random access channel (2-step RACH). Two-step random access combines the information exchange steps of four-step random access, reducing the number of steps and time required in the random access process compared to four-step random access.

[0103] 2. System Information Block (SI) A System Information Block (SI) consists of a master information block (MIB) and several system information blocks (SIBs). Alternatively, a SI can be divided into minimum system information (MSI) and other system information (OSI).

[0104] In 5G NR, SIB1 carries information related to whether a UE is allowed to access the cell and defines the scheduling of other system information (OSI). SIB1 can also be called remaining minimum system information (RMSI). SIB1 can be understood as the system information block necessary for a UE to access the cell. Furthermore, SIB1 provides radio resource configuration information shared by multiple UEs and prohibition information required for unified access control.

[0105] For example, the current protocol specifies that SIB1 is transmitted on the downlink shared channel (DL-SCH) with a period of 160ms, and is repeated within 160ms. For multiplexing mode 1 of the synchronization signal block / physical broadcast channel block (SS / PBCH block, SSB) and CORESET, the repetition period of SIB1 is 20ms; for multiplexing modes 2 / 3 of SSB and CORESET, the repetition period of SIB1 is the same as the transmission period of SSB.

[0106] 3. Random access occasion (RO) The Random Access Request (RO) is a time-frequency resource element used in wireless communication systems (such as 5G NR) to transmit the random access preamble (Msg1 or MsgA). The RO can be configured by the network; the UE initiates an access request on this RO, such as by sending the random access preamble. The RO can be understood as a time-frequency resource block defined on the physical random access channel (PRACH). For example, in 5G NR, the RO can be used by the UE to transmit Msg1 in a 4-step random access sequence, or the PRACH portion for transmitting MsgA in a 2-step random access sequence.

[0107] Currently, in the 3GPP standard, PRACH resource allocation relies on the configuration matrix indexed by prach-ConfigurationIndex in the system broadcast common configuration field rach-ConfigCommon. After receiving the configuration index value, the UE parses it to map a set of time-domain and frequency-domain resource allocation rules. This set of rules periodically and fixedly allocates ROs (Random Access Contexts) in the time-domain grid using predefined time-domain periods, modulo operations of the system frame number (SFN), and precise offsets at the subframe or time slot level. Furthermore, 3GPP also proposes the configuration of additional RO resources specified by rach-ConfigCommon. However, both traditional ROs and additional RO resources specified by rach-ConfigCommon rely on the periodic RO resource mapping based on the prach-ConfigurationIndex index, which severely fragments the network device's sleep time window. That is, the network device frequently wakes up its receive link and baseband decoding unit within a certain time interval to perform blind listening matching of the preamble sequence.

[0108] Figure 2 An example diagram of the distribution of existing ROs in the time domain is shown. Figure 2 As shown, corresponding RO resources are distributed for each SSB cycle. The UE can send a random access preamble using the RO resources. Figure 2 It can be seen that network devices need to frequently wake up their receive link and baseband decoding unit within a certain time interval in order to receive and process the random access preamble sent by the UE through the RO. It can be observed that existing RO configuration schemes suffer from fragmented wake-up issues in network devices.

[0109] It should be noted that, for ease of description, Figure 2 The block corresponding to an SSB in the code represents only one resource block, not that there is only one SSB in an SSB cycle. In fact, Figure 2 The diagram shows a single SSB, which can represent a group of SSBs or multiple SSBs that are sequential in the time domain. The beam direction or antenna orientation corresponding to each SSB transmitted by the network device is different.

[0110] 4. Physical downlink control channel (PDCCH) One of the functions of the PDCCH is to carry scheduling information sent from network devices to the UE. If the UE detects scheduling information in the DCI on the PDCCH, for downlink scheduling information, the UE can receive data through the physical downlink shared channel (PDSCH); for uplink scheduling information, the UE can send data through the physical uplink shared channel (PUSCH). The PDCCH can also be used to carry control information such as uplink power control commands. PDCCHs carrying different control information can have different DCI formats, and different DCI formats can be scrambled using different radio network temporary identifiers (RNTIs).

[0111] It should be understood that the technical terminology used in the embodiments of this application is for illustrative purposes only and not as a limitation. As technology evolves, technical terminology may also change. Where the technical meaning or function is the same, other technical terms should also be applicable to the embodiments of this application.

[0112] In view of this, this application proposes a communication method that, by designing a new random access timing configuration method, or introducing a random access parameter set for configuring the first RO cluster, enables network devices to centrally process the access of one or more potential UEs within a time window, thereby reducing the frequency of network device wake-ups. Furthermore, for scenarios where UEs are performing inter-cell handover or redirection, by introducing dedicated access parameter information (or the configuration of the second RO cluster), DCI blind detection is unnecessary, reducing the downlink blind detection power consumption of the UE.

[0113] The following detailed explanation of the solution provided in this application, in conjunction with the corresponding flowcharts, illustrates the method in detail. It is understood that the illustrative flowcharts provided in this application primarily use different devices (e.g., UE, network devices) as examples of the execution entities for this interactive illustration, but this application does not limit the execution entities of the interactive illustrations. For example, the devices (e.g., UE, network devices) in the illustrative flowcharts can also be chips, chip systems, or processors that support the implementation of this method on the device, or logical modules or software capable of implementing all or part of the device's functions.

[0114] As a general statement, the message or signaling interactions involved in the interaction process of this application embodiment can be standard messages or signaling or newly introduced messages or signaling. This application embodiment does not make specific limitations on this.

[0115] Figure 3This is an example flowchart illustrating a communication method according to an embodiment of this application. It can be understood that... Figure 3 The UE in the middle can be Figure 1 Terminal device 120 in the text can also refer to Figure 1 The device (e.g., processor, chip, or chip system) in the terminal device 120. The network device can be... Figure 1 The network device 110 mentioned here can also refer to the devices within the network device 110 (such as processors, chips, or chip systems). Figure 3 As shown, the method includes at least the following steps: Step 310: The network device sends a first signaling message to the UE. The first signaling message includes first indication information, which is used to indicate the activation of the first RO cluster. Correspondingly, the UE receives the first signaling message.

[0116] The first RO cluster can be understood as a set of ROs, a group of ROs, or a pool of RO resources. The first RO cluster includes one or more ROs arranged consecutively in the time domain. The starting time domain position of the window corresponding to the first RO cluster is determined based on a first offset, which is associated with the end-of-SSB time domain position. The end-of-SSB time domain position refers to the end-of-SSB time domain position of the last SSB among multiple SSBs sent by the network device in one SSB cycle. The window corresponding to the first RO cluster is located in the last SSB cycle out of N SSB cycles; N is an integer greater than 1.

[0117] by Figure 2 For example, N is 4, which is 4 SSB cycles, and each SSB cycle corresponds to one RO. In this embodiment, these 4 ROs are concentrated in the last SSB cycle of these 4 SSB cycles, and these 4 ROs can be arranged continuously to form the first RO cluster. The method for determining the time domain position of the first RO cluster will be described later.

[0118] The first RO cluster in this embodiment does not require calculating the RO period or determining the time domain location of the RO based on the absolute frame number. Instead, it introduces a newly defined first offset associated with the SSB (specifically, the first offset is associated with the end domain location of the SSB, where the end domain location of the SSB refers to the end domain location of the last SSB among the multiple SSBs sent by the network device in one SSB period). This allows multiple ROs to be densely arranged within a small time window, forming the first RO cluster. This small time window is located in the last SSB period among the multiple SSB periods. In this way, the network device can centrally process the access of multiple UEs in the last SSB period without waking up the baseband processing unit in each SSB period. This provides continuous sleep opportunities for the network device's receiving link and reduces the time of fragmented wake-up.

[0119] The first offset refers to the offset between the starting time-domain position of the window corresponding to the first RO cluster and the transmission position of the SSB. The transmission position of the SSB is the time-domain position corresponding to the SSB sent by the network device, or in other words, the ending time-domain position of the last SSB among the multiple SSBs sent by the network device.

[0120] The starting time domain position of the window corresponding to the first RO cluster is determined by introducing a first offset, or the RO position is calculated based on the SSB, without the need for complex absolute frame number calculation.

[0121] Optionally, the first offset is determined based on one or more of the following parameters: the transmission duration of system information, the processing duration of system information, and the first delay information, etc. The transmission duration of system information can be understood as the transmission duration of SIB1; the processing duration of system information refers to the time it takes for the UE to receive the SSB and decode SIB1.

[0122] The first latency information includes transmission latency and / or handover latency. Transmission latency refers to the delay in signal propagation (e.g., the delay in a signal being sent from a network device to a UE). Handover latency refers to the delay between the transmitter and receiver of a device. For example, handover latency includes the handover time from the transmitter to the receiver of a network device, and the handover time from the receiver to the transmitter of a UE.

[0123] For example, the first offset can be represented as ro-SSB-TimeOffset. ro-SSB-TimeOffset includes not only the processing time of SIB1 but also the transmission time of SIB1. After reading ro-SSB-TimeOffset, the UE skips the transmission and processing times of SIB1 and can directly locate or determine the starting time domain position of the first RO cluster.

[0124] In one possible implementation, the first offset satisfies the following formula: ; in, Represents the first offset; Represents the transmission duration of SIB1; This represents the duration for the UE to process SIB1; This represents latency. For example, This includes transmission delay and handover delay.

[0125] This application does not specifically limit the unit for representing the first offset. Optionally, the first offset is a value in the millisecond range. For example, the first offset is a value between 0 and 80 ms.

[0126] It is understandable that network devices are... SIB1 is broadcast within the specified time. After the UE receives the SSB and decodes SIB1, it sends a random access preamble in the window corresponding to the first RO cluster, which ensures the logical order and prevents the RO from conflicting with SIB1.

[0127] It should be noted that, to avoid potential uplink and downlink conflicts, the application scenario of this application is a high-frequency band scenario (such as the 6GHz terahertz band) that is not in multiplexing mode 1 (i.e., Pattern 1, which includes time division / frequency division multiplexing). This is because when the subcarrier spacing is large and the time slot is short, the UE's RF front-end and baseband processing need sufficient time to switch from "synchronous reception state" to "control channel demodulation state". At this time, the delay scheduling offset will be set to a large value, which may cause the PDCCH to be before, after, or in the same time slot as the SSB, potentially causing the RO to be after SIB1, which may lead to uplink and downlink conflicts. Therefore, to avoid such conflicts, the application scenario of this application does not use the high-frequency band scenario of multiplexing mode 1.

[0128] This application does not specify the triggering time for the network device to issue the first signaling. In some embodiments, when downlink data arrives in the core network, or when the access network device predicts a sudden uplink service or sudden uplink data, the network device sends the first signaling on the paging occasion (PO).

[0129] The embodiments of this application do not specifically limit the implementation of the first signaling. Optionally, the first signaling is DCI signaling. For example, the first signaling is DCI format 1_0 scrambled by P-RNTI.

[0130] Optionally, the first indication information is a bit of an existing or newly added field in the first signaling. For example, the first indication information uses one or more bits of the Short Message field in the DCI.

[0131] Optionally, when the value of the corresponding bit in the first indication information is the first value (e.g., Bit3=1), it indicates that the first RO cluster is activated; when the value of the corresponding bit in the first indication information is the second value (or a non-first value, such as Bit3=0), it indicates that the first RO cluster is not activated. Alternatively, the first indication information sent by the network device is activated when it is the first value; if the network device does not send the first indication information, the first RO cluster is not activated by default.

[0132] For example, the value of the first indication information is 1, which means that the first RO cluster is activated.

[0133] For a UE supporting the first RO cluster in this application embodiment, after receiving the first indication information, it can activate the configuration related to the first RO cluster according to the first indication information, and determine the time domain location of the first RO cluster using the configuration related to the first RO cluster. It is understood that there may still be old devices in the communication system that do not support the first RO cluster. When the old devices receive the first indication information, they will ignore the signaling and still use the original RO resources to perform the initial access procedure, thereby ensuring compatibility.

[0134] In some application scenarios, the UE is in the RRC_IDLE or RRC_INACTIVE state and performs the initial access procedure. For example, when the UE in the idle state wakes up during its paging, it listens to the PDCCH and receives the first indication information (or activation command) in the DCI. Based on the configuration or parameter set (at least including the first offset) associated with the first RO cluster, it determines the temporal location of the first RO cluster.

[0135] Of course, before determining the temporal location of the first RO cluster, the UE will obtain the configuration or parameter set related to the first RO cluster, as described below in conjunction with step 300.

[0136] Optionally, prior to step 310, the method further includes: In step 300, the network device sends a configuration message, which includes burst parameter information for random access. This burst parameter information is used to determine the first RO cluster. Correspondingly, the UE receives the configuration message.

[0137] This application does not specifically limit the form of the configuration message. Network devices can send configuration messages via broadcast, allowing multiple UEs to receive the burst parameter information. Optionally, the configuration message can be a system broadcast message, a paging message, or broadcast signaling, etc. For example, the configuration message is SIB1, which carries the burst parameter information.

[0138] Burst parameter information can be understood as a set of configuration parameters related to the first RO cluster, or burst parameter information used to configure the first RO cluster. For example, burst parameter information can be represented as the RACH-ConfigBursty parameter set; the RACH-ConfigBursty parameter set is a field introduced in this application embodiment for configuring the first RO cluster.

[0139] This application does not specifically limit the fields containing the RACH-ConfigBursty parameter set. The RACH-ConfigBursty parameter set can be added to existing random access configuration parameters or fields, or it can be a field in a newly introduced message.

[0140] For example, in the existing process, during the system information update cycle, the network device encapsulates the random access common configuration field `rach-ConfigCommon` in `BWP-UplinkCommon` and broadcasts it to the entire cell via SIB1. To address the issue of frequent wake-ups caused by the RO cycle determined by the existing `prach-ConfigurationIndex`, this application adds the `RACH-ConfigBursty` parameter set to the `rach-ConfigGeneric` field. The newly added `RACH-ConfigBursty` parameter set can exist concurrently with fields used to configure existing RO resources (such as `prach-ConfigurationIndex`) to ensure compatibility with existing RO resources. Of course, if the UE does not receive an activation command, it will not activate or take effect the `RACH-ConfigBursty` parameter set; instead, it will use the RO resources determined by the existing `prach-ConfigurationIndex`.

[0141] Optionally, the burst parameter information includes one or more of the following: first offset, first effective duration, and number of ROs included in the first RO cluster.

[0142] For a description of the first offset, please refer to the previous description; for the sake of brevity, it will not be repeated here.

[0143] The first valid duration refers to the duration or effective duration of the first RO cluster; or, the first valid duration refers to the duration of a single configured period. For example, the first valid duration can be represented as validity-Timer; the value of validity-Timer can represent... .

[0144] In this embodiment of the application, within one validity-Timer period, the determined first RO cluster is distributed in In the last SSB cycle within, All UE requests within a given time period are sent centrally to the first RO cluster. This allows network devices to wake up only in the first RO cluster to listen for UE access requests, eliminating the need to wake up in every SSB cycle. This reduces the wake-up time of network devices and helps them achieve longer sleep periods. Furthermore, since the ROs included in the first RO cluster are distributed across... In the last SSB cycle, this timing ensures that all UEs in each SSB cycle within the validity-Timer cycle can select the appropriate RO and map it to the corresponding SSB beam after receiving and processing SIB1.

[0145] In one possible implementation, the initial validity period can be periodic. That is, the first RO cluster configuration takes effect at fixed intervals (such as 40ms or other values).

[0146] Alternatively, in one possible implementation, the first effective duration can be non-periodic. The first effective duration can be configured in a one-shot mode, meaning that the first RO cluster configuration in this embodiment only takes effect for a fixed duration. After the first RO cluster configuration is activated once according to the first effective duration, it automatically reverts to the original RO resources (or the mode of existing RO resources), without requiring the network device to issue a DCI to shut down or deactivate the first RO cluster configuration again, which can further reduce signaling overhead.

[0147] The number of ROs included in the first RO cluster describes the number of ROs that are continuously arranged in the time domain within the window corresponding to the first RO cluster. For example, the number of ROs included in the first RO cluster is represented as msg1-TDM-ConsecutiveNumber. This application embodiment does not limit the specific value of the number of ROs included in the first RO cluster.

[0148] It should be noted that the multiple ROs included in the first RO cluster are only arranged in uplink resources and do not occupy downlink resources. For example, uplink resources refer to the UL symbols provided by network devices through tdd-UL-DL-ConfigurationCommon; downlink symbols or flexible symbols provided by tdd-UL-DL-ConfigurationCommon are not considered as resources occupied by ROs.

[0149] Of course, burst parameter information can also include other parameters. For example, burst parameter information may also include: the timing of activation, the preamble format, etc.

[0150] The activation timing refers to the time when the UE takes effect after receiving the first signaling. The activation timing can be understood as the point in time when the first RO cluster configuration takes effect after the UE receives the first indication information (or Layer 1 activation instruction, such as DCI format 1_0 carrying the activation instruction). For example, the activation timing can be represented as activation-DelayProfile.

[0151] Optionally, the effective timing may include two effective modes: (1) effective from the next available SSB cycle; (2) effective based on the modification cycle of system information.

[0152] The first activation mode can be configured as immediate activation mode (which can be represented as "immediate"). This means that after the UE receives the activation command and completes baseband processing, the validity-timer starts counting in the first available SSB cycle, meaning it takes effect from the next SSB cycle. This activation mode allows for millisecond-level response to burst traffic, enabling timely response to millimeter-level burst traffic.

[0153] The second activation mode can be configured to activate according to the system information modification cycle (represented as alignedSI-Period). This means that after receiving the activation command, the UE can follow the traditional RRC rules, and the validity-timer of the first RO cluster will only take effect at the boundary of the next system information modification cycle. The advantage of this is that it reduces, to some extent, the collision between the first RO cluster provided in this application and existing RO resource locations.

[0154] The preamble format (or preamble format) refers to the format used by the UE to send the preamble. Optionally, the UE can calculate the window duration of a single RO (Redirect Access Response) by combining the preamble format; after the single RO window ends, the network device determines the location to send the random access response message (e.g., MSG2) based on the duration of the single RO window. For details on how to calculate the RO duration based on the preamble format, please refer to existing related introductions, which will not be elaborated here.

[0155] In one possible implementation, the preamble format can reuse the short or long format of PRACH defined in existing standard protocols. The advantage of this is that network devices can flexibly distribute the preamble format value based on the coverage radius of the current cell. For example, if the preamble format is configured as c2, the UE's physical layer can know that a single RO is 6 symbols long in the time domain.

[0156] For example, Table 1 below shows the parameters that the RACH-ConfigBursty parameter set may include.

[0157]

[0158] For the meaning or explanation of each parameter in Table 1, please refer to the previous description. For the sake of brevity, it will not be repeated here.

[0159] It should be understood that the parameter set shown in Table 1 is merely an example, and the embodiments of this application are not limited thereto. For example, in practice, Table 1 may include more or fewer parameters.

[0160] It should also be understood that the naming of the parameters, or the types or values ​​of the parameters shown in Table 1, are merely exemplary descriptions, and the embodiments of this application are not limited thereto. In fact, the various parameters included in Table 1 can be replaced with other terms that have the same meaning or function.

[0161] It should be noted that after receiving burst parameter information, the UE can store the burst parameter information in the underlying context (such as L1 or L2) after parsing it. That is, the parsed burst parameter information is in a suspended state. This suspended state can be understood as the UE temporarily not using the parsed burst parameter information or not taking effect on the configuration of the first RO cluster, maintaining the original periodic RO mechanism. Instead, it will only use the parsed burst parameter information or take effect on the configuration of the first RO cluster after being activated by the first indication information issued by the network device (such as the first indication information carried in DCI signaling). This preserves the compatibility of older devices. Older devices refer to devices that support existing RO resources (e.g., UEs supporting R19 and UEs supporting protocol versions prior to R19), but do not support the first RO cluster introduced in this application, such as devices that do not support the RO resource pool specified by RACH-ConfigBursty introduced in this application.

[0162] It should be understood that this description is only based on the example of a network device broadcasting the aforementioned burst parameter information, and the embodiments of this application are not limited to this. In fact, the UE can also obtain the burst parameter information for configuring the first RO cluster through other means. For example, optionally, the aforementioned burst parameter information can be pre-stored in the UE, or in other words, the burst parameter information is predefined; after receiving the activation instruction (such as the aforementioned first indication information) issued by the network device, the UE takes effect the configuration of the first RO cluster.

[0163] Step 320: The UE determines the temporal location of the first RO cluster based on the first indication information.

[0164] In some embodiments, after receiving the first indication information, the UE will activate the previously suspended "burst parameter information for configuring the first RO cluster" and use the "burst parameter information for configuring the first RO cluster" to determine the specific time domain location of the first RO cluster.

[0165] The UE can receive a first SSB from the network device. The first SSB can be an SSB group, which includes multiple SSBs. Optionally, step 320 includes: the UE activating the burst parameter information corresponding to the first RO cluster according to the first indication information; determining the SSB end domain position (or reference anchor point) according to the received first SSB; and determining the start time domain position and end domain position of the first RO cluster based on the SSB end domain position and the burst parameter information. The SSB end domain position refers to the end domain position of the last SSB among multiple SSBs.

[0166] The burst parameter information corresponding to the first RO cluster mentioned above can be understood as: the "burst parameter information used to configure the first RO cluster" saved or suspended by the UE as described above. The network device can send a group of SSBs (which can be called burst SSBs). The UE can measure and select the optimal SSB from this group of SSBs, and use the end-domain position of the last SSB in the SSB group as the reference anchor point for subsequent uplink transmission, or the end-domain position of the SSB. The UE can combine the reference anchor point and the activated burst parameter information to jointly determine the time-domain position of the first RO cluster.

[0167] The reference anchor point refers to the field position corresponding to the end of the last SSB in the SSB group received by the UE, such as the end symbol boundary of the SSB, which can be denoted as... UE will As a reference anchor point for subsequent uplink transmissions, the end-of-SSB field position refers to the end-of-SSB field position of the last SSB among multiple SSBs when a network device sends multiple SSBs in an SSB cycle.

[0168] For example, after a UE in an idle state (such as RRC_IDLE or RRC_INACTIVE) performs a cell search, it undergoes a synchronization process and an SSB detection process. The synchronization process involves the UE scanning frequency points, detecting the primary synchronization signal or secondary synchronization signal (PSS / SSS), and decoding the PBCH to obtain the main information block and SIB1. The SSB detection process involves the UE measuring multiple SSBs (such as SSB burst groups) issued by the network equipment and selecting the beam index corresponding to the SSB with the best beam quality from among the multiple SSBs, for example, SSB Index #n. Based on the optimal SSB beam index, the UE determines the end-of-SSB domain position (as mentioned above, this could be the end-of-SSB boundary of the last SSB among multiple SSBs, denoted as...). .

[0169] Optionally, the starting time domain position of the first RO cluster is determined based on the reference anchor point (or the ending time domain position of the SSB), the first effective duration in the burst parameter information, the first offset in the burst parameter information, and one or more of the SSB cycle.

[0170] For example, the initial time-domain position of the first RO cluster satisfies the following equation: ; in, Indicates the starting time-domain position of the first RO cluster. , This is the end-of-segment location of the SSB (e.g., the end-of-symbol boundary). Indicates the first valid duration. Indicates the SSB period, This represents the first offset.

[0171] In this embodiment, the window corresponding to the first RO cluster is set to... The last SSB cycle in the process can guarantee that in one After all SSB cycles within a given period have ended, multiple UEs then send preambles within the designated window corresponding to the first RO cluster. This allows the network device to centrally process preambles sent by multiple UEs upon waking up within that window, thereby reducing the time spent frequently waking up the network device.

[0172] Optionally, the end-time domain position of the first RO cluster can be determined based on the number of ROs, the duration of a single RO, and the start-time domain position of the first RO cluster. The duration of a single RO can be calculated based on the format of the preamble.

[0173] Figure 4 An example diagram of the RO time-domain distribution in an embodiment of the application is shown. For example, the SSB period is 20ms, validity-Timer = 80ms, the first RO cluster includes 4 ROs (i.e., msg1-TDM-ConsecutiveNumber = 4), and the first RO cluster is active periodically. Figure 4 As shown, the first RO cluster is located in the last SSB cycle of the four SSB cycles. Furthermore, the first RO cluster is periodically active. It should be understood that, for ease of description, Figure 4 The image only shows two cycles in which the first RO cluster takes effect; subsequent cycles of the first RO cluster can continue to follow the same procedure. Figure 4 The period shown is periodically distributed, but the embodiments of this application are not limited thereto.

[0174] Compared to Figure 2 The network device needs to wake up and listen in each SSB cycle. Figure 4The network devices wake up at the first RO cluster to conduct centralized monitoring, that is, to centrally process the potential access of multiple UEs, thereby avoiding fragmented wake-up and increasing the continuous sleep time of the network devices.

[0175] Figure 5 Another example diagram of the RO time-domain distribution in an embodiment of this application is shown. For example, the SSB period is 20ms, validity-Timer=oneshot80ms (representing that the effective duration of the first RO cluster is 80ms per effective time), and the first RO cluster includes 4 ROs (i.e., msg1-TDM-ConsecutiveNumber=4), such as Figure 5 As shown, the first RO cluster is located in the last SSB cycle of the four SSB cycles.

[0176] Similarly, compared to Figure 2 The network device needs to wake up and listen in the RO during each SSB cycle. Figure 5 The network equipment wakes up at the first RO cluster to listen and centrally handle potential access from multiple UEs, thus avoiding fragmented wake-ups and increasing continuous sleep time. However, compared to... Figure 4 The difference is that, Figure 4 The first RO cluster in the system is activated periodically, while Figure 5 Yes, the first RO cluster is in single-use mode, meaning that after 80ms, the first RO cluster will no longer be active, and will revert to the default RO mode. Figure 2 The RO mode is shown.

[0177] It should be understood that Figure 4 or Figure 5 The examples of the RO distribution or the values ​​of the various parameters are merely illustrative descriptions, and the embodiments of this application are not limited thereto. It should also be understood that, similar to... Figure 2 , Figure 4 or Figure 5 The description also uses a square to represent a group of SSBs, and does not limit an SSB cycle to only one SSB.

[0178] Step 330: The UE determines the first RO resource based on the time domain location of the first RO cluster.

[0179] After determining the time-domain window corresponding to the first RO cluster or the time-domain location of the first RO cluster, the UE can select one RO resource from multiple ROs to send a random access preamble (or MSG1). The first RO resource is the RO corresponding to the optimal SSB beam selected by the UE. As mentioned earlier, the optimal SSB beam selected by the UE is the SSB beam with the best signal quality among the multiple SSBs sent by the network device. There is a correspondence between each SSB and RO; the relationship between SSB and RO can be one-to-many or many-to-one. The correspondence between SSB and RO can be obtained through the existing parameter target-SSB-Index. After determining the optimal SSB, the UE can select the RO corresponding to the optimal SSB in the first RO cluster based on the correspondence between SSB and RO, and use it as the first RO resource.

[0180] For example, if the network device sends 5 SSBs, and the UE selects the optimal SSB#2 from these 5 SSBs, then the UE selects the RO corresponding to SSB#2 in the first RO cluster as the first RO resource, and sends a random access preamble in the first RO resource.

[0181] In step 340, the UE sends a random access preamble on the first RO resource. Correspondingly, the network device receives the random access preamble on the first RO resource.

[0182] Optionally, in step 350, the network device sends a random access response message. Correspondingly, the UE receives the random access response message.

[0183] After receiving the random access preamble from the UE, the network device can send a random access response message to the UE according to the existing procedure. Furthermore, the network device can enter a sleep state after sending the random access response message, without needing to frequently listen to the RO (Resource Response). Of course, the timing of the network device sending the random access response can also be adjusted or shifted based on the position of the first RO resource received from the random access preamble (e.g., adjusting the ra-ResponseWindow), which will not be elaborated here. For example, the RO used by the network device in determining the sending time of the random access response in the existing procedure can be replaced with the first RO resource in this embodiment.

[0184] Of course, for UEs using RO cluster configuration to perform initial access, the subsequent process after successful access can refer to the existing access process, which will not be elaborated here.

[0185] Optionally, in step 360, if the preset conditions are met, the UE does not use the aforementioned first RO cluster and returns to the first RO mode.

[0186] The purpose of introducing preset conditions is to illustrate that the UE can automatically fall back to the first RO mode after the first RO cluster exceeds its effective duration (or first valid duration). The first RO mode refers to the default periodic RO mode (e.g., existing periodic RO resources). This application embodiment does not limit the implementation method of the preset conditions. The preset conditions can be related to the effective duration of the first RO cluster. For example, the preset conditions include: exceeding the first valid duration or effective duration of the first RO cluster.

[0187] For example, if validity-Timer = oneShot, i.e., single-shot mode, then the UE in a specified time... Subsequently, the first RO cluster configuration is no longer used. Instead, it immediately reverts to the state where the DCI has not activated the first RO cluster configuration, suspending the configuration parameters of the first RO cluster (RACH-ConfigBursty parameter set). The first RO cluster configuration is only activated when an activation command is received again. After the validity-Timer timeout period expires, it reverts to the default periodic RO mode. The network device does not need to issue additional signaling to instruct the UE to revert to the state where the first RO cluster configuration is not activated, thus reducing signaling overhead.

[0188] For example, if validity-Timer is a time value (e.g., 80ms), representing the period of the first RO cluster as 80ms, then within this time period, the UE is allowed to perform a retransmission attempt after a RAR failure, i.e., retransmit the random access preamble within the RO window. When it is periodic, if the UE does not receive a message in the DCI Short Message field where a specific bit (e.g., Bit 3) is set to 0, it will default to using the configuration of the first RO cluster. If the UE receives a message in the DCI Short Message field where a specific bit (e.g., Bit 3) is set to 0, it will revert to the default periodic RO mode.

[0189] In this embodiment, by introducing the configuration of a first RO cluster, the network device sends a first signaling to the UE to activate the configuration parameter set of the first RO cluster. This allows the network device to centrally process the access of multiple potential UEs within the time window corresponding to the first RO cluster. That is, the network device does not need to wake up in every SSB cycle, but only once every few SSB cycles, thereby reducing the number of wake-ups and increasing the sleep time of the network device (or providing opportunities for continuous sleep), which helps to achieve network energy saving. Furthermore, this embodiment also considers the alignment of cell common signaling in the time domain, ensuring the synchronization of downlink and uplink active times.

[0190] The process described above introduces the concept of RO clusters during initial access. The UE can apply this when using 4-step random access. Figure 3 The process is shown.

[0191] Currently, when a connected UE performs inter-cell handover, it needs to listen to the PDCCH to perform DCI blind detection, which increases downlink blind detection power consumption and introduces additional latency. Therefore, this application also provides a handover procedure that adds a unicast parameter set (such as the `rach-ConfigBurstyDedicated` parameter set) for handover. This allows RO configuration information to be sent to a specific UE via unicast, providing a method for the UE to obtain RO configuration across carriers. This eliminates the need for the UE to perform DCI blind detection, saving UE power consumption and eliminating the latency caused by DCI blind detection.

[0192] The following combination Figure 6 This application describes the switching process provided in its embodiments. It should be noted that... Figure 6 and Figure 3 The methods and procedures shown can be implemented in combination or independently, without specific limitations. For example, Figure 6 The source network device shown is Figure 3 The network device shown is the source network device where the UE performs initial access.

[0193] For example, in execution Figure 3 After the initial access is performed using the method shown, the UE in connected state (RRC_CONNECTED) is transmitting data in the source cell. If a cell handover is triggered, then it can be performed as follows: Figure 6 The process shown performs a cell handover, that is, a handover from the source cell to the target cell.

[0194] For example, the UE includes the suspended configuration parameters shown above. Regardless of whether these configuration parameters are activated by DCI, they can be used in accordance with the following procedures when cell handover is triggered: Figure 6 The process shown performs a cell handover.

[0195] This application does not specifically limit the RO mode used by the target network device during the handover process. Optionally, during inter-cell handover, the target network device can still simultaneously process the initial access procedure of existing UEs in the current cell, such as according to... Figure 3 The initial access procedure shown illustrates how the RO cluster processes the UE's access request, or the target network device processes the UE's access request according to the existing RO configuration. Furthermore, when negotiating resources, the target network device and the source network device minimize the probability of collisions between the RO configuration of their own cell and the RO clusters across cells.

[0196] like Figure 6As shown, it includes the following steps: Optionally, in step 600, cell handover is triggered.

[0197] This application does not specifically limit the events or conditions that trigger cell handover. For explanations of events or conditions that trigger cell handover, please refer to standards or related technologies. Optionally, as the UE moves and / or traffic changes, the UE reports a Measurement Report to the source network device. Based on signal quality and / or load balancing strategies, the source network device determines whether to handover the UE to the target cell or target network device, add a secondary cell (SCell Addition), or activate a new bandwidth portion (BWP Switch).

[0198] Step 610: The source network device and the target network device perform a negotiation process to request dedicated access resources for the UE.

[0199] Optionally, the negotiation process includes: the source network device sending a request message to the target network device; the request message being used to request dedicated burst access resources for the UE; and the target network device sending a response message to the source network device, the response message including burst parameter information allocated to the UE.

[0200] For example, during the negotiation process, when allocating burst parameter information to the UE, the target network device may consider the initial access procedures of existing UEs in the cell, so that the second RO cluster configuration determined by the burst parameter information allocated to the UE can avoid the RO configuration corresponding to the initial access of existing UEs in the cell as much as possible, thereby reducing RO collisions or conflicts.

[0201] For example, the source network device and the target network device negotiate via the Xn interface to request dedicated burst access resources for the UE. After the source network device and the target network device have negotiated, a unicast command can be sent to the UE to inform the UE of the configuration information of the second RO cluster.

[0202] Step 611: The source network device sends a second signaling message to the UE. The second signaling message includes burst parameter information specific to the UE (which can be simply referred to as dedicated burst parameter information). Correspondingly, the UE receives the second signaling message.

[0203] Optionally, the second signaling is an RRC reconfiguration message (RRCReconfiguration). The spCellConfigCommon field in the RRC reconfiguration message carries exclusive burst parameter information, that is, burst parameter information that belongs to this UE (for example, represented as rach-ConfigBurstyDedicated).

[0204] Compared to Figure 3 The initial access process shown is as follows. Figure 6 The process shown will configure a unique preamble index for the UE, so that the UE will not conflict with other UEs when accessing the network (collision-free), thereby improving the access success rate.

[0205] Optionally, the dedicated burst parameter information includes at least one or more of the following: preamble index, target cell SSB index, second offset, and second effective duration.

[0206] The preamble index refers to the exclusive orthogonal preamble index assigned to the UE in the target cell (i.e., used to identify the exclusive preamble assigned to the UE). For example, the preamble index is represented as ra-PreambleIndex, and its value can be any value from 0 to 63.

[0207] The SSB index of the target cell (e.g., denoted as target-SSB-Index) refers to the spatial domain quasi-co-location (QCL) reference beam anchor point of the target cell. target-SSB-Index can be used to determine the correspondence between SSBs and ROs, such as a one-to-many or many-to-one correspondence. By introducing the target cell's SSB index, the UE only starts the ro-SSB-TimeOffset timer when it decodes an SSB matching the index in the time domain, thus initiating random access on the RO corresponding to the SSB. Therefore, by establishing the spatial beam alignment relationship between the transceivers in advance, the overhead caused by blind beam scanning after UE cell handover is avoided in directional beamforming systems, and the receiving beam of the network equipment can be accurately directed within a very narrow micro-wake-up window.

[0208] The following describes the function of target-SSB-Index with examples. For instance, target-SSB-Index is used to determine the mapping relationship between SSB and RO. This indicates the end time of an SSB group. For example, in 5G, within the first 5 milliseconds of an SSB cycle, network devices transmit multiple directional SSBs through multiple antennas. These SSBs from different directions are arranged sequentially in chronological order. This represents the end time of transmission of the last SSB among multiple SSBs. The UE measures these SSBs on the downlink and selects the one with the best signal quality (e.g., SSB#2). This means the UE is under the coverage of beam #2. Once the UE selects SSB #2, it sends a random access preamble in the RO mapped to SSB #2. As long as the network device receives the random access preamble sent by the UE in this specific RO, it can know that the UE is under beam #2. Of course, whether each SSB corresponds to one or more ROs, or multiple SSBs correspond to one RO, depends on the mapping rule target-SSB-Index.

[0209] The second offset refers to the starting time-domain position of the second RO cluster, relative to the ending time-domain position of the target SSB (for example, expressed as...). The offset between () and (). For example, the second offset is represented as ro-SSB-TimeOffset; its unit of representation can be symbols. The end field position corresponding to the target SSB refers to the end field position of the last SSB among the multiple SSBs sent by the target network device.

[0210] The second validity period (which can be represented as validity-Timer) refers to the duration or duration of the specific burst parameter information that is in effect. Compared to Figure 3 The effective duration shown is configured as a one-shot mode for the effective duration of burst parameter information specific to this UE. That is, the effective mode of burst parameter information specific to this UE during the handover process is a one-shot mode.

[0211] When a UE initiates access using the RO in the second RO cluster determined by the dedicated burst parameter information, if the access fails, both the UE and the target network device release or destroy resources from the context information, and this process will not repeat periodically.

[0212] Of course, in addition to the parameters shown above, the dedicated burst parameter information may also include other information. Optionally, the dedicated burst parameter information may also include one or more of the following: the window length of the RO, the frequency domain start position, the frequency division multiplexing scaling factor, etc.

[0213] The window length of the RO (which can be expressed as burstLength-Symbols) refers to the duration of the RO in the time domain (e.g., the length at the symbol level). In other words, it is the window length that the RO is allowed to transmit in the time domain. This allows the baseband processing unit of the target network device to quickly fall back to a deep sleep state after completing the reception or detection of a specific sequence within the tiny window corresponding to the RO. Optionally, the window length of the RO can be set to a value greater than or equal to ra-PreambleIndex. Setting it to a value greater than ra-PreambleIndex provides a redundancy safety value.

[0214] The frequency domain start position (which can be represented as msg1-FrequencyStart) refers to the frequency domain start position corresponding to the physical resource block (PRB) for UE transmission of MSG1. The frequency division multiplexing scaling factor can be represented as msg1-FDM-ScalingFactor. The interpretations of msg1-FrequencyStart and msg1-FDM-ScalingFactor can also be found in existing standards.

[0215] It should be noted that, due to the high degree of limitation in the frequency domain, the computational power consumption and basic energy consumption of the baseband processing unit of the network device during the wake-up period for full bandwidth frequency sweep and blind detection are reduced. In this embodiment, by combining the ra-PreambleIndex with the exclusive preamble code specified for the UE, the baseband processing unit of the network device (such as the target network device) only needs to perform a matching filter of a specific sequence once, instead of blindly detecting 64 sequences as in the traditional RACH, which helps to save the power consumption of the network device.

[0216] The following description, in conjunction with the examples in Table 2, describes the burst parameter information (or rach-ConfigBurstyDedicated parameter set) belonging to this UE.

[0217] Table 2

[0218] The meanings or explanations of the parameters shown in Table 2 can be found in the preceding descriptions, and will not be repeated here for the sake of brevity.

[0219] It should be understood that the parameters shown in Table 2 are merely exemplary descriptions, and the embodiments of this application are not limited thereto. In fact, more or fewer parameters may be included in practice than those shown in Table 2.

[0220] Step 620: The UE activates the dedicated burst parameter information according to the second signaling and sends a completion message to the source network device. The completion message is used to notify the RRC that the reconfiguration is complete. Correspondingly, the source network device receives the completion message.

[0221] Since this is a deterministic mobility event for a connected UE, when the UE switches its radio link to the target carrier (or target frequency), the UE's underlying state machine can directly mark the configuration parameters of the second RO cluster or the burst parameter information specific to the UE (i.e., rach-ConfigBurstyDedicated) as active, without waiting for the target network device to issue an activation command. In other words, the UE does not need to listen for additional DCI trigger signals, or activation commands; it can directly mark rach-ConfigBurstyDedicated as active, thus avoiding the additional power consumption or latency caused by downlink blind detection DCI.

[0222] The completion message is used to notify the source network device that the aforementioned second signaling has been received. Optionally, the completion message is an RRC reconfiguration completion message (represented as RRCReconfigurationComplete).

[0223] For example, after receiving the second signaling, the UE can apply the configuration of the second RO cluster (or dedicated burst parameter information) at the physical layer and MAC layer, and reply with a completion message to the source network device.

[0224] In step 630, the target network device sends a second SSB. Correspondingly, the UE receives the second SSB from the target network device.

[0225] The second SSB can also be understood as a group of SSBs sent by the target network device. After the UE switches to the target carrier, it receives the target SSB group sent by the target network device and selects the SSB with the best signal quality in the SSB group. The UE can determine the end-domain position (e.g., the time-domain position of the end symbol) corresponding to the last SSB in the target SSB group based on the SSB group. ).

[0226] Step 640: The UE determines the second RO cluster based on the second SSB and the dedicated burst parameter information.

[0227] Optionally, the starting time-domain position of the second RO cluster is determined based on one or more of the following: a second offset, second delay information, and the ending time-domain position of the second SSB.

[0228] For example, the starting time-domain position of the second RO cluster satisfies the following equation:

[0229] in, Indicates the starting time-domain position of the second RO cluster. This indicates the end-of-field position corresponding to the second SSB. This indicates the second offset. This indicates the second delay information.

[0230] Optionally, the second delay information includes one or more of the following: the handover time between the device's receiver and transmitter, signal transmission delay, signal processing delay, etc. For example, the handover time between the device's receiver and transmitter includes: the handover delay between the target network device's receiver and transmitter; and the handover delay between the UE's receiver and transmitter. Of course, this is not limited to whether the handover is from the receiver to the transmitter or from the transmitter to the receiver; the specific application will determine the appropriate method.

[0231] Step 650: The UE sends a dedicated preamble to the target network device based on the second RO resource, which is the RO resource in the second RO cluster.

[0232] After identifying the second RO cluster, the UE selects a second RO resource within the second RO cluster and initiates a non-contention-based random access on that second RO resource using a dedicated preamble. The dedicated preamble is the preamble index included in the aforementioned burst parameter information belonging to the UE. Accordingly, since the target network device and the source network device have negotiated in advance, the target network device will receive the dedicated preamble sent by the UE on the time-frequency resource corresponding to the second RO cluster. The method by which the UE determines the second RO resource can be referenced from the method for determining the first RO resource described earlier; for simplicity, it will not be elaborated here.

[0233] Optionally, the method further includes: step 660, whereby the target network device sends a random access response message to the UE. Correspondingly, the UE receives the random access response message.

[0234] In other words, if the access is successful, the target network device will reply to the UE with a random access response message (or MSG2).

[0235] Step 670: Delete the information related to the second RO cluster.

[0236] It should be noted that the entity performing step 670 can be either the target network device or the UE.

[0237] After the UE successfully accesses the network, the system deletes information related to the second RO resources. As mentioned earlier, to facilitate deletion, the effective duration of the second RO cluster configuration is set to a single-use mode. This way, after the UE receives a random access response message, or after the target network device sends a random access response message, it will automatically delete or clear information related to the second RO cluster in the context, or in other words, destroy (or release) the resources of the second RO cluster, thereby reducing resource consumption. Even after successfully accessing the target network device and deleting or clearing information related to the second RO cluster, the UE remains in a connected state.

[0238] Optionally, if the UE fails to access the RO resource selected in the second RO cluster, it can try to access it again; or, it can fall back to the existing RO mode to initiate access. This application embodiment does not specifically limit this.

[0239] This application embodiment does not specifically limit the behavior of the target network device after deleting information related to the second RO cluster. Optionally, after deleting information related to the ROs of the second RO cluster, the target network device can enter a sleep state and may not listen in each RO window. If the target network device has an initial access UE and the target network device adopts the aforementioned configuration of the first RO cluster, then the target network device can wake up and process the access in the corresponding time window of the first RO cluster according to the configuration of the first RO cluster, thereby increasing the duration of continuous sleep.

[0240] Optionally, if the target network device and the UE engage in low-frequency data interaction during subsequent data communication, the target network device can continue to maintain energy-saving mode, thus achieving on-demand access.

[0241] based on Figure 6 The scheme shown in this application takes into account the scenario of cell handover. By adding a parameter set of the second RO cluster, it can be used for fast handover, eliminating the latency or power consumption caused by UE blind detection DCI.

[0242] It should also be understood that Figures 1 to 6 The flowcharts or scene diagrams shown are for illustrative purposes only and are not intended to limit the embodiments of this application to the examples illustrated. In fact, those skilled in the art can interpret the embodiments based on... Figures 1 to 6 The examples in the document can be transformed into equivalent ways to obtain more implementations.

[0243] The above text combined Figures 1 to 6 This document describes in detail the communication method provided in the embodiments of this application. The following will combine... Figure 7 and Figure 8The device embodiments of this application are described in detail below. It should be understood that the communication device of this application embodiment can execute the various communication methods of the foregoing embodiments of this application, that is, the specific working processes of the various products below can be referred to the corresponding processes in the foregoing method embodiments.

[0244] In the embodiments described above, the UE can execute some or all of the steps in each embodiment; the network device can execute some or all of the steps in each embodiment. These steps or operations are merely examples, and the embodiments of this application can also perform other operations or variations of various operations. Furthermore, the steps can be executed in different orders as presented in the embodiments, and it is not necessary to execute all the operations in the embodiments of this application. Moreover, the sequence number of each step does not imply 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 this application.

[0245] Figure 7 This is a schematic block diagram of a communication device provided in an embodiment of this application. Figure 7 As shown, the communication device 1500 may include a communication module 1520. The communication module 1520 can implement corresponding communication functions, which can be internal communication functions of the communication device 1500 or communication functions between the communication device 1500 and other devices. Optionally, the communication module 1520 may also be referred to as a communication interface or transceiver module. Optionally, the communication device 1500 further includes a processing module 1510. The processing module 1510 can implement corresponding processing functions.

[0246] Optionally, the communication device 1500 further includes a storage module, which can be used to store instructions and / or data; the processing module 1510 can read the instructions and / or data in the storage module so that the communication device 1500 can implement the aforementioned method embodiments.

[0247] In one possible design, the communication device 1500 may correspond to the UE in the above method embodiments, or to a component (such as a circuit, chip, or chip system) configured in the UE. The communication device 1500 may be used to perform the steps or processes performed by the UE in any of the above method embodiments.

[0248] In one possible design, the communication module 1520 is configured to receive first signaling, the first signaling including first indication information, the first indication information being used to indicate the configuration for activating a first RO cluster; the first RO cluster includes one or more ROs arranged in the time domain; the starting time domain position of the window corresponding to the first RO cluster is determined based on a first offset, the first offset being associated with the end time domain position of an SSB, the end time domain position of an SSB referring to the end time domain position of the last SSB among multiple SSBs sent by the network device in an SSB cycle; the window corresponding to the first RO cluster is located in the last SSB cycle out of N SSB cycles; N is an integer greater than 1; The communication module 1520 is also used to receive the first SSB; The processing module 1510 is used to determine the time domain location corresponding to the first RO cluster based on the first indication information and the first SSB; The communication module 1520 is also used to send a random access preamble to the first RO resource, which is determined in the first RO cluster.

[0249] Optionally, as an embodiment, the communication module 1520 is further configured to receive a configuration message, the configuration message including burst parameter information of random access, the burst parameter information being used to determine the first RO cluster; The processing module 1510 is used to determine the time domain location corresponding to the first RO cluster according to the first indication information and the first SSB, including: determining the time domain location corresponding to the first RO cluster according to the first indication information, the first SSB and the burst parameter information.

[0250] Optionally, as an embodiment, the burst parameter information includes one or more of the following: the first offset, the first effective duration, and the number of ROs included in the first RO cluster; Wherein, the first offset refers to the offset between the starting time domain position of the window corresponding to the first RO cluster and the ending time domain position of the first SSB. The first effective duration refers to the effective duration of the first RO cluster.

[0251] Optionally, as an embodiment, the burst parameter information may further include one or more of the following: the timing of the activation after the UE receives the first signaling; the preamble format.

[0252] Optionally, as an embodiment, the first offset is determined based on one or more of the following parameters: the transmission duration of system information, the processing duration of system information, and first delay information; the first delay information includes transmission delay and / or switching delay.

[0253] Optionally, as an embodiment, the first signaling is DCI signaling, and the first indication information is the short message field in the DCI signaling; when the value of the short message field is a first value, it indicates that the configuration of the first RO cluster is activated.

[0254] Optionally, as an embodiment, the processing module 1510 is used to determine the time-domain position of the first RO cluster, including: activating the burst parameter information corresponding to the first RO cluster according to the first indication information; determining the time-domain position at the end of the SSB according to the received first SSB; and determining the start time-domain position and the end time-domain position of the first RO cluster based on the end time-domain position of the SSB and the burst parameter information; wherein the start time-domain position of the first RO cluster is determined according to one or more of the end time-domain position of the SSB, the first effective duration, the first offset, and the SSB period.

[0255] Optionally, as an embodiment, the starting time-domain position of the first RO cluster satisfies the following formula: ; in, Indicates the starting time-domain position of the first RO cluster. , This is the end-of-segment location of the SSB. Indicates the first valid duration. Indicates the SSB period, This represents the first offset.

[0256] Optionally, as an embodiment, the processing module 1510 is further configured to automatically fall back to the first RO mode after the first RO cluster exceeds the effective duration, the first RO mode referring to the default periodic RO mode.

[0257] Optionally, as an embodiment, the network device is a source network device; the communication module 1520 is further configured to receive a second signaling, the second signaling including dedicated burst parameter information, the dedicated burst parameter information being used to configure a second RO cluster; The processing module 1510 is also configured to activate the dedicated burst parameter information according to the second signaling and send a completion message to the source network device; The communication module 1520 is also used to receive a second SSB from the target network device; The second RO cluster is determined based on the second SSB and the dedicated burst parameter information; The communication module 1520 is also used to send a dedicated preamble to the target network device based on the second RO resource, wherein the second RO resource is the RO resource in the second RO cluster.

[0258] Optionally, as an embodiment, the starting time-domain position of the second RO cluster is determined based on one or more of the following: a second offset, second delay information, and the ending time-domain position of the second SSB; wherein the second delay information includes one or more of the following: the switching time between the receiver and transmitter of the device, the signal transmission delay, and the signal processing delay.

[0259] Optionally, as an embodiment, the dedicated burst parameter information includes at least one or more of the following: preamble index, target cell SSB index, second offset, and second effective duration; The preamble index is used to identify the exclusive preamble assigned to the UE; The second offset is the offset between the starting time-domain position of the second RO cluster and the ending time-domain position corresponding to the target SSB; The second effective duration is the duration during which the exclusive burst parameter information is effective.

[0260] Optionally, as an embodiment, the dedicated burst parameter information may further include one or more of the following: the window length of RO, the frequency domain start position, and the frequency division multiplexing scaling factor.

[0261] Optionally, as an embodiment, the communication module 1520 is further configured to receive a random access response message from the target network device; the processing module 1510 is further configured to delete information related to the second RO cluster.

[0262] Alternatively, in another possible design, the communication device 1500 may correspond to the network device in the above method embodiments, or a component (such as a circuit, chip, or chip system) configured in the network device. The communication device 1500 can be used to perform the steps or processes performed by the network device in any of the above method embodiments.

[0263] In one possible design, the communication module 1520 is used to send a first signaling message, the first signaling message including first indication information, the first indication information being used to indicate the configuration for activating a first RO cluster; the first RO cluster includes one or more ROs arranged in the time domain; the starting time domain position of the window corresponding to the first RO cluster is determined according to a first offset, the first offset being associated with the end time domain position of an SSB, the end time domain position of an SSB refers to the end time domain position of the last SSB among multiple SSBs sent by the network device in an SSB cycle; the window corresponding to the first RO cluster is located in the last SSB cycle out of N SSB cycles; N is an integer greater than 1; The communication module 1520 is also used to send a first SSB; The communication module 1520 is also used to receive a random access preamble for a first RO resource, which is determined in the first RO cluster.

[0264] Optionally, as an embodiment, the communication module 1520 is further configured to send a configuration message, the configuration message including burst parameter information of random access, the burst parameter information being used to determine the first RO cluster.

[0265] Optionally, as an embodiment, the burst parameter information includes one or more of the following: the first offset, the first effective duration, and the number of ROs included in the first RO cluster; Wherein, the first offset refers to the offset between the starting time domain position of the window corresponding to the first RO cluster and the ending time domain position of the first SSB. The first effective duration refers to the effective duration of the first RO cluster.

[0266] Optionally, as an embodiment, the burst parameter information may further include one or more of the following: the timing of the activation after the UE receives the first signaling; the preamble format.

[0267] Optionally, as an embodiment, the first offset is determined based on one or more of the following parameters: the transmission duration of system information, the processing duration of system information, and first delay information; the first delay information includes transmission delay and / or switching delay.

[0268] Optionally, as an embodiment, the first signaling is DCI signaling, and the first indication information is the short message field in the DCI signaling; when the value of the short message field is a first value, it indicates that the configuration of the first RO cluster is activated.

[0269] Optionally, as an embodiment, the starting time domain position of the first RO cluster is determined based on one or more of the following: the ending time domain position of the SSB, the first effective duration, the first offset, and the SSB period.

[0270] Optionally, as an embodiment, the starting time-domain position of the first RO cluster satisfies the following formula: ; in, Indicates the starting time-domain position of the first RO cluster. , This is the end-of-segment location of the SSB. Indicates the first valid duration. Indicates the SSB period, This represents the first offset.

[0271] Optionally, as an embodiment, the network device is a source network device; the communication module 1520 is further configured to interact with the target network device to obtain burst access resources requested for the UE; The communication module 1520 is also used to send a second signaling to the UE, the second signaling including dedicated burst parameter information, the dedicated burst parameter information being used to configure a second RO cluster; The communication module 1520 is also configured to receive a completion message from the UE, the completion message being used to notify the RRC that the reconfiguration is complete.

[0272] Optionally, as an embodiment, the starting time-domain position of the second RO cluster is determined based on one or more of the following: a second offset, second delay information, and the ending time-domain position of the second SSB; wherein the second delay information includes one or more of the following: the switching time between the receiver and transmitter of the device, the signal transmission delay, and the signal processing delay.

[0273] Optionally, as an embodiment, the dedicated burst parameter information includes at least one or more of the following: preamble index, target cell SSB index, second offset, and second effective duration; The preamble index is used to identify the exclusive preamble assigned to the UE; The second offset is the offset between the starting time-domain position of the second RO cluster and the ending time-domain position corresponding to the target SSB; The second effective duration is the duration during which the exclusive burst parameter information is effective.

[0274] Optionally, as an embodiment, the dedicated burst parameter information may further include one or more of the following: the window length of RO, the frequency domain start position, and the frequency division multiplexing scaling factor.

[0275] The above are merely examples; for detailed steps or procedures, please refer to the descriptions in the foregoing embodiments.

[0276] Figure 8 This is another schematic block diagram of the communication device 1600 provided in the embodiments of this application. The communication device 1600 may be a chip, chip system, or processor, etc., in a UE (e.g., a UE) or network device that implements the above methods. The communication device 1600 can be used to implement the methods described in the above method embodiments; for details, please refer to the descriptions in the above method embodiments.

[0277] like Figure 8 As shown, the communication device 1600 may include one or more processors 1610, which may also be referred to as processing units or processing modules, and can implement certain control functions. The processor 1610 may be a general-purpose processor or a dedicated processor, such as a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, while the central processing unit can be used to control the communication device 1600 (e.g., a base station, baseband chip, user, user chip), execute software programs, and process data from the software programs.

[0278] In an alternative design, the processor 1610 may also store instructions and / or data that can be executed by the processor 1610 to cause the communication device 1600 to perform the methods described in the above method embodiments.

[0279] In another alternative design, the communication device 1600 may include a communication interface 1620 for implementing receiving and transmitting functions. For example, the communication interface 1620 may be a transceiver circuit, interface, interface circuit, or transceiver. The transceiver circuit, interface, interface circuit, or transceiver for implementing receiving and transmitting functions may be separate or integrated. The aforementioned transceiver circuit, interface, interface circuit, or transceiver may be used for reading and writing code / data, or it may be used for transmitting or relaying signals.

[0280] Optionally, the communication device 1600 may include one or more memories 1630, which may store instructions that can be executed on the processor 1610, causing the communication device 1600 to perform the methods described in the above method embodiments. Optionally, the memories 1630 may also store data. Optionally, the processor 1610 may also store instructions and / or data. The processor 1610 and the memories 1630 may be provided separately or integrated together.

[0281] It should be understood that, in one possible design, the steps in the method embodiments provided in this application can be implemented by integrated logic circuits in the processor's hardware or by instructions in software form. The steps of the methods disclosed in the embodiments of this application can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method. To avoid repetition, detailed descriptions are not provided here.

[0282] In one implementation, the communication device 1600 may correspond to the UE in the above method embodiments and may be used to execute various steps and / or processes performed by the UE in the above method embodiments. The processor 1610 may be used to execute instructions stored in the memory 1630, and when the processor 1610 executes the instructions stored in the memory, the processor 1610 is used to execute various steps and / or processes of the above method embodiments corresponding to the UE.

[0283] In another implementation, the communication device 1600 may correspond to a network device (such as a satellite or base station) in the above method embodiments, and may be used to execute the various steps and / or processes executed by the network device in the above method embodiments. The processor 1610 may be used to execute instructions stored in the memory 1630, and when the processor 1610 executes the instructions stored in the memory, the processor 1610 is used to execute the various steps and / or processes of the above method embodiments corresponding to the network device.

[0284] It should be understood that the aforementioned processing device can be one or more chips. For example, the processing device can be a field-programmable gate array (FPGA), an application-specific integrated circuit (ASIC), a system-on-chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), a microcontroller unit (MCU), a programmable logic device (PLD), or other integrated chips.

[0285] It is understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as 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 linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0286] According to the method provided in the embodiments of this application, this application also provides a chip system, which includes one or more processors for calling and executing instructions stored in memory, thereby causing the method described in the embodiments of this application to be executed. The chip system may be composed of chips or may include chips and other discrete devices.

[0287] The chip system may include output circuits or interfaces for transmitting information or data, and input circuits or interfaces for receiving information or data.

[0288] According to the method provided in the embodiments of this application, this application also provides a communication system, which includes the aforementioned network device and UE.

[0289] According to the method provided in the embodiments of this application, this application also provides a computer program product, which includes: computer program code, which, when run on a computer, causes the computer to execute the various steps or processes executed by the network device or UE in any of the foregoing method embodiments.

[0290] According to the method provided in the embodiments of this application, this application also provides a computer-readable storage medium storing program code, which, when run on a computer, causes the computer to execute the various steps or processes performed by the network device or UE in any of the foregoing method embodiments.

[0291] The computer-readable storage medium may be the aforementioned volatile memory or non-volatile memory, or it may include both volatile memory and non-volatile memory.

[0292] In the embodiments of this application, the terms and English abbreviations are exemplary examples given for ease of description and should not be construed as limiting the application in any way. This application does not preclude the possibility of defining other terms that can achieve the same or similar functions in existing or future agreements.

[0293] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions. When these computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated.

[0294] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0295] It should be understood that in the various embodiments of this application, the sequence number of each process does not imply 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 this application.

[0296] Furthermore, the terms "system" and "network" are often used interchangeably in this paper. The term "and / or" in this paper merely describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this paper generally indicates that the preceding and following related objects have an "or" relationship. For example, A / B can represent A or B.

[0297] In the embodiments of this application, the terms "information," "signal," "message," "channel," and "signaling" may sometimes be used interchangeably. It should be noted that, without emphasizing the distinction between them, their intended meanings are consistent. Similarly, the terms "of," "corresponding (relevant)," and "corresponding" may sometimes be used interchangeably. It should be noted that, without emphasizing the distinction between them, their intended meanings are consistent.

[0298] To clarify, the specific implementation of "predefined" can include any of the following: protocol predefined, manufacturer-specified, defined by the communication equipment, pre-installed in the communication equipment at the time of manufacture, or agreed upon in advance by other agreed methods.

[0299] The terms (or designations) "first," "second," etc., appearing in the embodiments of this application are for descriptive purposes only, that is, only to distinguish different objects, and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first," "second," etc., may explicitly or implicitly include one or more features. In the description of the embodiments of this application, "at least one (item)" refers to one or more. "Multiple" means two or more. "At least one (item) below" or similar expressions refer to any combination of these items, including any combination of a single (item) or a plurality of (items).

[0300] For example, expressions like "the item includes at least one of the following: A, B, and C" appearing in the embodiments of this application generally mean, unless otherwise specified, that the item can be any one of the following: A; B; C; A and B; A and C; B and C; A, B and C; A and A; A, A and A; A, A and B; A, A and C, A, B and B; A, C and C; B and B, B, B and B, B, B and C, C and C; C, C and C, and other combinations of A, B, and C. The above uses three elements, A, B, and C, as examples to illustrate the possible entries for the item. When expressed as "the item includes at least one of the following: A, B, ..., and X," that is, when the expression contains more elements, then the applicable entries for the item can also be obtained according to the aforementioned rules.

[0301] In summary, the above description is merely a preferred embodiment of the technical solution of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A communication method, characterized in that, Applied to a user equipment (UE), the method includes: The system receives first signaling from a network device. This first signaling includes first indication information, which indicates the configuration for activating a first RO cluster. The first RO cluster includes one or more ROs arranged in the time domain. The starting time domain position of the window corresponding to the first RO cluster is determined based on a first offset, which is associated with the end-of-SSB time domain position. The end-of-SSB time domain position refers to the end-of-SSB time domain position of the last SSB among multiple SSBs sent by the network device in one SSB cycle. The window corresponding to the first RO cluster is located in the last SSB cycle out of N SSB cycles, where N is an integer greater than 1. Receive the first SSB from the network device; Based on the first indication information and the first SSB, determine the time domain location corresponding to the first RO cluster; A random access preamble is sent to the first RO resource, which is determined in the first RO cluster; Determining the time-domain location of the first RO cluster includes: According to the first instruction information, activate the burst parameter information corresponding to the first RO cluster; The domain position at the end of the SSB is determined based on the first SSB; Based on the end-of-SSB domain position and burst parameter information, the start-of-time domain position and end-of-time domain position of the first RO cluster are determined. The starting time domain position of the first RO cluster is determined based on one or more of the following: the ending time domain position of the SSB, the first effective duration, the first offset, and the SSB period.

2. The method according to claim 1, characterized in that, The method further includes: Receive a configuration message from the network device, the configuration message including burst parameter information for random access, the burst parameter information being used to determine the first RO cluster; Determining the time-domain location corresponding to the first RO cluster based on the first indication information and the first SSB includes: Based on the first indication information, the first SSB, and the burst parameter information, the time domain location corresponding to the first RO cluster is determined.

3. The method according to claim 2, characterized in that, The burst parameter information includes one or more of the following: the first offset, the first effective duration, and the number of ROs included in the first RO cluster; Wherein, the first offset refers to the offset between the starting time domain position of the window corresponding to the first RO cluster and the ending time domain position of the first SSB. The first effective duration refers to the effective duration of the first RO cluster.

4. The method according to claim 3, characterized in that, The burst parameter information also includes one or more of the following: the timing of the activation after the UE receives the first signaling; the preamble format.

5. The method according to claim 1 or 3, characterized in that, The first offset is determined based on one or more of the following parameters: the transmission duration of system information, the processing duration of system information, and the first delay information; the first delay information includes transmission delay and / or switching delay.

6. The method according to any one of claims 1 to 4, characterized in that, The first signaling is DCI signaling, and the first indication information is the short message field in the DCI signaling; when the value of the short message field is the first value, it indicates that the configuration of the first RO cluster is activated.

7. The method according to claim 1, characterized in that, The initial time-domain position of the first RO cluster satisfies the following formula: ； in, Indicates the starting time-domain position of the first RO cluster. , This is the end-of-segment field location for the SSB. Indicates the first valid duration. Indicates the SSB period. This indicates the first offset.

8. The method according to any one of claims 1 to 4, characterized in that, The method further includes: After the first RO cluster exceeds its valid duration, it will automatically revert to the first RO mode, which refers to the default periodic RO mode.

9. The method according to claim 1, characterized in that, The network device is a source network device; the method further includes: Receive a second signaling from the source network device, the second signaling including dedicated burst parameter information, the dedicated burst parameter information being used to configure the second RO cluster; Activate the dedicated burst parameter information according to the second signaling, and send a completion message to the source network device; Receive the second SSB from the target network device; The second RO cluster is determined based on the second SSB and the dedicated burst parameter information; Based on the second RO resource, a dedicated preamble is sent to the target network device. The second RO resource is the RO resource in the second RO cluster.

10. The method according to claim 9, characterized in that, The starting time domain position of the second RO cluster is determined based on one or more of the following: a second offset, second delay information, and the ending time domain position of the second SSB; wherein the second delay information includes one or more of the following: the switching time between the receiver and transmitter of the device, the signal transmission delay, and the signal processing delay.

11. The method according to claim 9, characterized in that, The dedicated burst parameter information includes at least one or more of the following: preamble index, target cell SSB index, second offset, and second effective duration; The preamble index is used to identify the exclusive preamble assigned to the UE; The second offset is the offset between the starting time-domain position of the second RO cluster and the ending time-domain position corresponding to the target SSB; The second effective duration is the duration during which the exclusive burst parameter information is effective.

12. The method according to claim 11, characterized in that, The dedicated burst parameter information also includes one or more of the following: RO window length, frequency domain start position, and frequency division multiplexing scaling factor.

13. The method according to claim 9, characterized in that, The method further includes: Receive a random access response message from the target network device; Delete information related to the second RO cluster.

14. A communication method, characterized in that, Applied to network devices, the method includes: A first signaling message is sent to the UE, the first signaling message including first indication information, the first indication information being used to indicate the configuration for activating a first RO cluster; the first RO cluster includes one or more ROs arranged in the time domain; the starting time domain position of the window corresponding to the first RO cluster is determined according to a first offset, the first offset being associated with the end time domain position of an SSB, the end time domain position of an SSB refers to the end time domain position of the last SSB among multiple SSBs sent by the network device in an SSB cycle; the window corresponding to the first RO cluster is located in the last SSB cycle among N SSB cycles; N is an integer greater than 1; the starting time domain position of the first RO cluster is determined according to the end time domain position of an SSB, a first effective duration, the first offset, and one or more of the SSB cycles; Send the first SSB; The random access preamble is received from the UE in the first RO resource, which is determined in the first RO cluster.

15. The method according to claim 14, characterized in that, The method further includes: A configuration message is sent, which includes burst parameter information for random access, and the burst parameter information is used to determine the first RO cluster.

16. The method according to claim 15, characterized in that, The burst parameter information includes one or more of the following: the first offset, the first effective duration, and the number of ROs included in the first RO cluster; Wherein, the first offset refers to the offset between the starting time domain position of the window corresponding to the first RO cluster and the ending time domain position of the first SSB. The first effective duration refers to the effective duration of the first RO cluster.

17. The method according to claim 16, characterized in that, The burst parameter information also includes one or more of the following: the timing of the activation after the UE receives the first signaling; the preamble format.

18. The method according to claim 14 or 16, characterized in that, The first offset is determined based on one or more of the following parameters: the transmission duration of system information, the processing duration of system information, and the first delay information; the first delay information includes transmission delay and / or switching delay.

19. The method according to any one of claims 14 to 17, characterized in that, The first signaling is DCI signaling, and the first indication information is the short message field in the DCI signaling; when the value of the short message field is the first value, it indicates that the configuration of the first RO cluster is activated.

20. The method according to claim 14, characterized in that, The initial time-domain position of the first RO cluster satisfies the following formula: ； in, Indicates the starting time-domain position of the first RO cluster. , This is the end-of-segment field location for the SSB. Indicates the first valid duration. Indicates the SSB period. This indicates the first offset.

21. The method according to claim 14, characterized in that, The network device is a source network device; the method further includes: Interact with the target network device to obtain bursty access resources requested for the UE; Send a second signaling message to the UE, the second signaling message including dedicated burst parameter information, the dedicated burst parameter information being used to configure the second RO cluster; A completion message is received from the UE, which is used to notify the RRC that the reconfiguration is complete.

22. The method according to claim 21, characterized in that, The starting time domain position of the second RO cluster is determined based on one or more of the following: a second offset, second delay information, and the ending time domain position of the second SSB; wherein the second delay information includes one or more of the following: the switching time between the receiver and transmitter of the device, the signal transmission delay, and the signal processing delay.

23. The method according to claim 21, characterized in that, The dedicated burst parameter information includes at least one or more of the following: preamble index, target cell SSB index, second offset, and second effective duration; The preamble index is used to identify the exclusive preamble assigned to the UE; The second offset is the offset between the starting time-domain position of the second RO cluster and the ending time-domain position corresponding to the target SSB; The second effective duration is the duration during which the exclusive burst parameter information is effective.

24. The method according to claim 23, characterized in that, The dedicated burst parameter information also includes one or more of the following: RO window length, frequency domain start position, and frequency division multiplexing scaling factor.

25. A communication device, characterized in that, The device includes at least one processor coupled to a memory storing a program or instructions, wherein the processor executes the program or instructions to cause the communication device to perform the method as claimed in any one of claims 1 to 13, or to cause the communication device to perform the method as claimed in any one of claims 14 to 24.

26. A computer-readable storage medium having a computer program or instructions stored thereon, characterized in that, When the computer program or instructions are executed, they cause the computer to perform the method as described in any one of claims 1 to 13, or cause the computer to perform the method as described in any one of claims 14 to 24.

27. A chip system, characterized in that, The chip system includes one or more processors, which are configured to retrieve and execute instructions stored in memory, such that the method as claimed in any one of claims 1 to 13 is executed, or that the method as claimed in any one of claims 14 to 24 is executed.

28. A computer program product, characterized in that, It includes computer program instructions that cause a computer to perform the method as described in any one of claims 1 to 13; or, cause a computer to perform the method as described in any one of claims 14 to 24.

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