Random access and communication methods and apparatuses, and device

Abstract

The present application relates to the technical field of communications, and discloses random access and communication methods and apparatuses, and a device. The random access method disclosed in embodiments of the present application comprises: a terminal receives first information about a second access object group sent by a network-side device by means of a first access object, the second access object group comprising one or more second access objects different from the first access object, and the first information comprising system information (SIB) of the second access object; and, on the basis of the first information and a first rule, the terminal selects, from among the first access object and the second access object group, a target access object on which a first operation is to be performed, the first operation comprising camping or random access, and the access objects comprising one of a carrier, a cell, and a bandwidth part (BWP).

Description

Random access, communication method, device and equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on December 19, 2023, with application number 202311764463.0 and invention name “Random access, communication method, device and equipment”. The entire contents of the Chinese patent application are incorporated herein by reference. Technical Field

[0003] The present application belongs to the field of communication technology, and specifically relates to a random access, communication method, apparatus and device. Background Art

[0004] In order to enhance the capacity of the network side, multiple access objects (such as multi-carrier / multi-cell) are introduced on the network side. Currently, there are two random access schemes in multi-carrier scenarios: one in which each carrier is independent of the others. The base station transmits one or more of the following information on each carrier: a synchronization signal or physical broadcast channel block (SSB), system information block 1 (SIB1), and paging. Based on this information, the user equipment (UE) can select any carrier for random access. However, in this random access scheme, since all carriers are always transmitting signals, energy consumption on the network side is very high. The other is for carrier aggregation (CA) scenarios. In this scenario, the base station transmits SIB1 and paging only on the primary carrier (also known as the primary cell (PCell)). Accordingly, UEs can only perform random access on the primary carrier / PCell. While this random access scheme can reduce network energy consumption, it also causes network congestion because all UEs perform random access on the primary carrier, increasing the probability of random access failure.

[0005] Furthermore, in order to avoid the problems existing in the above two random access schemes, the network side distinguishes between carriers. Some carriers normally send at least one of the information such as SSB, SIB1 and paging, while other carriers do not send them. For carriers that do not send this information, the UE can refer to the carrier that sends this information to achieve random access. However, this reference needs to meet certain conditions, such as the mutually referenced carriers must be intra-band carriers / intra-band cells, or the mutually referenced carriers must be co-located carriers / co-located cells. If these conditions are not met, the carriers that do not send the above information still need to be sent normally, which makes the energy consumption on the network side still high.

[0006] Therefore, in a multi-access object scenario, how to implement random access of UEs while saving energy on the network side and ensuring the capacity of the network side as much as possible remains a technical problem that needs to be solved urgently. Summary of the Invention

[0007] The embodiments of the present application provide a random access and communication method, apparatus, and device to maximize the capacity of the network side while saving energy on the network side.

[0008] In a first aspect, a random access method is provided, the method comprising:

[0009] The terminal receives first information about a second access object group sent by a network-side device through a first access object, wherein the second access object group includes one or more second access objects different from the first access object, and the first information includes system information SIB of the second access object;

[0010] The terminal selects a target access object for performing a first operation from the first access object and the second access object group based on the first information and the first rule, wherein the first operation includes residence or random access, and the access object includes one of a carrier, a cell, and a bandwidth part BWP.

[0011] In a second aspect, a communication method is provided, the method comprising:

[0012] The network side device sends first information about the second access object group to the terminal through the first access object, wherein the second access object group includes one or more second access objects different from the first access object, and the first information includes system information SIB of the second access object. The first information is used by the terminal to select the target access object for performing the first operation, wherein the first operation includes residence or random access, and the access object includes one of a carrier, a cell, and a bandwidth part BWP.

[0013] In a third aspect, a random access apparatus in a multi-carrier scenario is provided, the apparatus comprising:

[0014] an information receiving module, configured to receive first information about a second access object group sent by a network-side device through a first access object, wherein the second access object group includes one or more second access objects different from the first access object, and the first information includes system information SIB of the second access object;

[0015] An access object selection module is used to select a target access object for performing a first operation from the first access object and the second access object group based on the first information and the first rule, wherein the first operation includes residence or random access, and the access object includes one of a carrier, a cell, and a bandwidth part BWP.

[0016] In a fourth aspect, a communication device is provided, the device comprising:

[0017] An information sending module is used to send first information about a second access object group to a terminal through a first access object, wherein the second access object group includes one or more second access objects different from the first access object, and the first information includes system information SIB of the second access object. The first information is used by the terminal to select a target access object for performing a first operation, wherein the first operation includes residence or random access, and the access object includes one of a carrier, a cell, and a bandwidth part BWP.

[0018] In a fifth aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0019] In the sixth aspect, a terminal is provided, comprising a processor and a communication interface, wherein the communication interface is used to receive first information about a second access object group sent by a network side device through a first access object, wherein the second access object group includes one or more second access objects different from the first access object, and the first information includes system information SIB of the second access object, and the processor is used to select a target access object for performing a first operation in the first access object and the second access object group according to the first information and a first rule, wherein the first operation includes residence or random access.

[0020] In the seventh aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

[0021] In the eighth aspect, a network side device is provided, including a processor and a communication interface, wherein the communication interface is used to send first information about a second access object group to a terminal through a first access object, wherein the second access object group includes one or more second access objects different from the first access object, and the first information includes system information SIB of the second access object, and the first information is used by the terminal to select a target access object to perform a first operation, wherein the first operation includes residence or random access.

[0022] In the ninth aspect, a communication system is provided, comprising: a terminal and a network side device, wherein the terminal can be used to execute the steps of the random access method as described in the first aspect, and the network side device can be used to execute the steps of the communication method as described in the second aspect.

[0023] In the tenth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0024] In the eleventh aspect, a chip is provided, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

[0025] In a twelfth aspect, a computer program / program product is provided, wherein the computer program / program product is stored in a storage medium and is executed by at least one processor to implement the steps of the method described in the first aspect or the second aspect.

[0026] In an embodiment of the present application, since the network side device provides the first information about the second access object group to the terminal through the first access object, the first information includes the system information SIB of the second access object. The terminal can select the target access object to be resident or randomly accessed from the first access object and the second access object group based on the first information and the first rule. The second access object is not required to continuously send information such as SSB and SIB. Therefore, the capacity of the network side can be guaranteed as much as possible while saving energy on the network side. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 is a block diagram of a wireless communication system provided in an embodiment of the present application.

[0028] FIG2 is a schematic flow chart of a random access method provided in an embodiment of the present application.

[0029] FIG3 is a schematic flow chart of a random access method provided in another embodiment of the present application.

[0030] FIG4 is a schematic flow chart of a random access method provided in another embodiment of the present application.

[0031] FIG5 is a schematic flow chart of a random access method provided in another embodiment of the present application.

[0032] FIG6 is a schematic diagram of WUS resource configuration provided in an embodiment of the present application.

[0033] FIG7 is a schematic diagram of WUS resource configuration provided by another embodiment of the present application.

[0034] FIG8 is a schematic diagram of WUS resource configuration provided by another embodiment of the present application.

[0035] FIG9 is a flow chart of a communication method provided in an embodiment of the present application.

[0036] FIG10 is a schematic structural diagram of a random access device provided in an embodiment of the present application.

[0037] FIG11 is a schematic structural diagram of a random access device provided in another embodiment of the present application.

[0038] FIG12 is a schematic structural diagram of a random access device provided in another embodiment of the present application.

[0039] FIG13 is a schematic structural diagram of a random access device provided in another embodiment of the present application.

[0040] FIG14 is a schematic structural diagram of a communication device provided in an embodiment of the present application.

[0041] FIG15 is a schematic structural diagram of a communication device of the present application.

[0042] FIG16 is a schematic diagram of the hardware structure of the terminal according to an embodiment of the present application.

[0043] Figure 17 is a schematic diagram of the hardware structure of the network side device in an embodiment of the present application. DETAILED DESCRIPTION

[0044] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, any other embodiments obtained by ordinary technicians in this field fall within the scope of protection of this application.

[0045] The terms "first", "second", etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same type, and do not limit the number of objects. For example, the first access object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0046] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the technology described can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and the NR terminology is used in most of the following description, but these technologies can also be applied to applications other than NR system applications, such as 6th generation (6G) systems. th Generation, 6G) communication system.

[0047] FIG1 shows a block diagram of a wireless communication system applicable to embodiments of the present application. The wireless communication system includes a terminal 11 and a network-side device 12 . The terminal 11 may be a mobile phone, a tablet personal computer, a laptop computer or a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR) / virtual reality (VR) device, a robot, a wearable device, a vehicle-mounted device (VUE), a pedestrian terminal (PUE), a smart home (a home appliance with wireless communication capabilities, such as a refrigerator, a television, a washing machine, or furniture), a game console, a personal computer (PC), an ATM, or a self-service machine, etc. The wearable device includes: a smart watch, a smart bracelet, a smart headset, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), a smart wristband, smart clothing, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device 12 may also be referred to as a radio access network device, a radio access network (RAN), a radio access network function, or a radio access network unit. The access network device 12 may include a base station, a WLAN access point, or a WiFi node, etc. The base station may be referred to as a node B, an evolved node B (eNB), an access point, a base transceiver station (BTS), a radio base station, a radio transceiver, a basic service set (BSS), an extended service set (ESS), a home node B, a home evolved node B, a transmitting and receiving point (TRP), or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0048] In order to maximize network capacity while saving energy on the network side, the embodiments of the present application propose a random access method, apparatus, and terminal, as well as a communication method, apparatus, and network-side equipment, which are described in detail below with reference to the accompanying drawings.

[0049] First, a random access method proposed in an embodiment of the present application is described.

[0050] As shown in FIG2 , a random access method proposed in an embodiment of the present application may include:

[0051] Step 201. The terminal receives first information about a second access object group sent by a network-side device through a first access object, wherein the second access object group includes one or more second access objects different from the first access object, and the first information includes system information SIB of the second access object, and the access object includes one of a carrier, a cell, and a bandwidth part BWP.

[0052] The access object may include one of a carrier, a cell, and a bandwidth part (BWP). A random access method proposed in an embodiment of the present application is for a scenario with multiple access objects, and is mainly described below by taking a multi-carrier scenario as an example.

[0053] In one embodiment, in a multi-carrier scenario, the first access target may be an anchor carrier, and the second access target may be a non-anchor carrier. On the anchor carrier, the UE can obtain system information of the anchor carrier and necessary system information of other non-anchor carriers. Furthermore, based on the system information obtained from the anchor carrier, the UE can perform at least one of random access (RACH), data transmission, and data reception on any anchor carrier or non-anchor carrier.

[0054] In another embodiment, in a multi-carrier scenario, the first access object may be a carrier that normally sends SSB, the second access object may be a carrier that does not send SSB (SSB-less carrier), or the second access object may be a carrier that supports on-demand SSB transmission (on-demand SSB carrier).

[0055] In an embodiment of the present application, the SSB includes at least one of a synchronization signal block (Synchronization Signal Block, SSB) and a physical broadcast channel block (Physical Broadcast Channel block).

[0056] An embodiment of the present application provides a random access method applicable to a scenario in which a network-side device configures a system information block (SIB) of a second access object on a first access object (i.e., the first information includes the SIB of the second access object). These scenarios may include:

[0057] Scenario 0: The SIBs of all second access objects in the second access object group are configured on the first access object. All second access objects in the second access object group do not send SIBs, but send SSBs normally and perform normal RACH monitoring.

[0058] Scenario 1: The SIBs of all second access objects in the second access object group are configured on the first access object. All second access objects in the second access object group do not send SIBs, do not send SSBs, or send energy-saving SSBs. The first access object is used as a reference and normal RACH monitoring is performed.

[0059] Scenario 2: The first access object is configured with the SIBs of all second access objects in the second access object group and the WUS configuration that triggers SSB transmission. All second access objects in the second access object group do not send SIBs or SSBs, but perform normal RACH monitoring.

[0060] Scenario 3: The first access object is configured with the SIBs of all second access objects in the second access object group and the WUS configuration that triggers RACH monitoring. All second access objects in the second access object group do not send SIBs, and all send or do not send SSBs (with the first access object as the reference carrier), and do not perform normal RACH monitoring.

[0061] Scenario 4: The first access object is configured with the SIBs of all second access objects in the second access object group and the WUS configuration that triggers SSB sending and RACH monitoring. All second access objects in the second access object group do not send SIBs, do not send SSBs, and do not perform normal RACH monitoring.

[0062] The first information may be sent by the first access object through a broadcast message; or, it is assumed that the first information is the same as the corresponding information of the first access object.

[0063] The system information of the second access object included in the first information includes at least one of the following:

[0064] All or part of the SIBs of the second access object, where the part of the SIBs may include at least one of: public land mobile network (PLMN) information, configuration information related to cell selection criteria, configuration information related to cell reselection criteria, and cell barring information;

[0065] The system information block 1 (SIB1) status information of the second access object, the SIB1 status information including at least one of: SIB1 is not sent and SIB1 is carried by the system information of the first access object.

[0066] The first information corresponds to at least one second access object in the second access object group, and the first information further includes at least one of the following:

[0067] 1) triggering the at least one second access object to send an SSB wake-up signal (WUS) configuration information, or triggering the at least one second access object to perform SSB adaptation (SSB adaptation) WUS configuration information;

[0068] 2) WUS configuration information for triggering RACH monitoring of the at least one second access object, or WUS configuration information for triggering RACH monitoring adaptation (RACH adaptation) of the at least one second access object;

[0069] 3) The configuration information related to the SSB currently being sent by the at least one second access object may specifically include at least one of the following:

[0070] whether the at least one second access object is sending an SSB;

[0071] At least one of the frequency of the SSB being sent by the at least one second access object, the SSB sending period, and the number of SSBs in a sending period;

[0072] The at least one second access object is sending a transmission mode of the SSB, and the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, a compact transmission mode, a long-cycle transmission mode (the transmission cycle of the SSB is long) and an on-demand transmission mode, wherein the energy-saving transmission mode can be a simplified transmission mode that only sends a primary synchronization signal (PSS) and a secondary synchronization signal (SSS), and the compact transmission mode can be a transmission mode in which there is no time domain gap between multiple SSBs.

[0073] 4) Configuration information related to the RACH monitoring behavior currently in which the at least one second access object is located may specifically include at least one of the following:

[0074] whether the at least one second access object performs RACH monitoring;

[0075] At least one of a transmission period of the RACH being monitored by the at least one second access object, the number of RACHs in a transmission period, RACH frequency domain resource configuration information, and RACH time domain resource configuration information;

[0076] The at least one second access object monitors the RACH in a monitoring mode, where the monitoring mode includes one of a normal monitoring mode, a simplified monitoring mode (e.g., a reduced RO opportunity), an aggregated monitoring mode, and an on-demand monitoring mode, wherein the simplified monitoring mode may include a reduced RO opportunity, the aggregated monitoring mode may be a monitoring mode with no time domain gap between multiple ROs, and RO is the abbreviation of physical random access channel opportunity (PRACH Occasion).

[0077] 5) SSB configuration information sent after successful WUS triggering, which may include at least one of the following:

[0078] After the WUS is successfully triggered, at least one of the frequency of sending SSB, the period of sending SSB, and the number of SSBs in one sending period of the at least one second access object;

[0079] After the WUS is successfully triggered, the at least one second access object sends a listening window for the SSB, that is, the UE listens to the SSB within the listening window;

[0080] After the WUS is successfully triggered, the at least one time domain resource index or the position of at least one time domain resource of the at least one second access object actually sending the SSB;

[0081] After the WUS is successfully triggered, at least one of the transmission time length, the number of SSB transmission times, and the number of SSB transmission cycles of the at least one second access object;

[0082] After the WUS is successfully triggered, the relative relationship between the SSB sent by the at least one second access object and the SSB sent by the first access object in at least one of the time domain, frequency domain, and spatial domain;

[0083] After the WUS is successfully triggered, the time domain resource position of the first SSB sent by the at least one second access object is, for example, sent in the most recent SSB period of X time slots / symbols after the trigger signal (WUS) is sent;

[0084] After the WUS is triggered successfully, the at least one second access object sends the SSB transmission mode, and the transmission mode includes one of the normal transmission mode, the energy-saving transmission mode (for example, only sending PSS and SSS), the aggregated transmission mode (for example, there is no time domain interval between multiple SSBs), the long-cycle transmission mode (SSB cycle is longer) and the on-demand transmission mode.

[0085] 6) Configuration information related to RACH monitoring after successful WUS triggering, which may include:

[0086] After the WUS is triggered successfully, the at least one second access object monitors at least one of the RACH monitoring period, the number of RACHs monitored, the frequency domain resource configuration information of the RACH monitored, the time domain resource configuration information of the RACH monitored, and the monitoring mode of the RACH monitored, wherein the monitoring mode includes a normal monitoring mode, a simplified monitoring mode (for example, reducing RO opportunities), an aggregated monitoring mode (no time domain interval between multiple ROs), and an on-demand monitoring mode.

[0087] 7) The characteristic information of the at least one second access object may include at least one of the following:

[0088] identification information of the at least one second access object;

[0089] whether the at least one second access object can use the first access object as a reference access object;

[0090] whether the at least one second access object is co-located with the first access object;

[0091] whether the at least one second access object and the first access object are in the same timing advance group (TAG);

[0092] whether the at least one second access object has a Quasi Co-Location (QCL) relationship with the first access object;

[0093] a reference access object of the at least one second access object;

[0094] an access object co-located with the at least one second access object;

[0095] an access object that is located in the same TAG as the at least one second access object;

[0096] an access object having a QCL relationship with the at least one second access object;

[0097] Whether the at least one second access object is in a prohibited Bar state;

[0098] The priority of the at least one second access object when the UE performs random access channel selection;

[0099] whether the at least one second access object is set to a Bar state for a first type of UE, wherein the first type includes at least one of reduced capability (Redcap), non-terrestrial network (NTN), and support for a network energy saving (NES) function;

[0100] The characteristic value N of the UE ID of the at least one second access object allowing random access, for example, a UE with UE ID mod number of carriers=N can perform random access on the carrier;

[0101] whether the at least one second access object supports UE residency;

[0102] Whether the at least one second access object is a suitable cell;

[0103] Whether the at least one second access object supports cell selection and / or cell reselection.

[0104] The WUS configuration information included in the first information may include at least one of the following:

[0105] 1) WUS synchronization reference configuration information, which may include at least one of the following:

[0106] At least one of an SSB, a channel state information reference signal (CSI-RS), and a tracking reference signal (TRS) of the first access object;

[0107] GPS timing.

[0108] 2) WUS resource configuration information, which may include at least one of the following:

[0109] Time domain resource information;

[0110] Frequency domain resource information;

[0111] The signal sequence configuration information, for example, a preamble group, may specifically indicate a preamble group index, indicating that the preamble group is used to trigger the SSB of the at least one second access object.

[0112] 3) WUS power configuration information, which may include at least one of the following:

[0113] Initial signal power;

[0114] Signal power ramp-up step size.

[0115] 4) WUS retransmission configuration information may include at least one of the following:

[0116] The number of repetitions of a single signal transmission;

[0117] The maximum number of repetitions sent by the channel.

[0118] 5) WUS airspace parameter configuration information, which may include at least one of the following:

[0119] A correspondence between the WUS and the SSB of the first access object;

[0120] a correspondence between the WUS and the SSB of the at least one second access object;

[0121] The correspondence between WUS and the SSB of the second access object group.

[0122] 6) WUS sending timer configuration information. The timer is used to prevent WUS from being sent too frequently. Generally, the timer is started after the WUS is sent. Repeated WUS sending is not allowed before the timer expires.

[0123] The form of the WUS signal includes at least one of the following:

[0124] RACH;

[0125] Msg1;

[0126] Preamble sequence;

[0127] Sounding Reference Signal (SRS);

[0128] Physical Uplink Control Channel (PUCCH).

[0129] The configuration method of the WUS resource configuration information includes at least one of the following:

[0130] Configuring a signal resource list in the first information, where each element of the signal resource list corresponds one-to-one to the second access object or the second access object group index size, and an element in the signal resource list includes one or more resources;

[0131] Configuring a signal resource list in the first information, where each element of the signal resource list explicitly corresponds to the second access object or the second access object group index;

[0132] Configuring a candidate resource set in the first information, where one or more resources in the candidate resource set correspond to a resource number, one resource number corresponds to an index of a second access object or a second access object group, and the resource number is determined according to at least one of a time domain, a frequency domain, and a spatial domain;

[0133] One or more signal resources are configured for the second access object or the second access object group in the first information.

[0134] The signal resources configured by the WUS resource configuration information include at least one of the following:

[0135] The time-frequency resources are the same as the time-frequency resources of the common RACH on the first access object or the second access object group, that is, the common RACH on the first access object shares the same video resources;

[0136] The time-frequency resources are time-frequency resources of a dedicated RACH on the first access object or the second access object group, which is specifically used to trigger SSB transmission and / or RACH monitoring, wherein the time-frequency resources of the dedicated RACH and the dedicated RACH configuration may be completely different from the time-frequency resources used by the common RACH on the first access object, or may be part of the time-frequency resources of the common RACH on the first access object;

[0137] The time-frequency resources are the time-frequency resources of the dedicated SRS / PUCCH on the first access object or the second access object group used to trigger SSB transmission and / or RACH monitoring.

[0138] The grouping method of the second access object group includes at least one of the following:

[0139] Configured by network-side devices;

[0140] As stipulated by the agreement.

[0141] The grouping rule of the second access object group includes at least one of the following:

[0142] The second access objects in the same frequency band are grouped together;

[0143] The second access objects in the same frequency band interval are grouped together;

[0144] The second access objects having at least one of the same initial BWP, active BWP, SSB, and SCS are grouped together;

[0145] The second access objects with the same transmission mode are grouped together, wherein the transmission mode is related to at least one of the following: whether to send SSB, whether to perform RACH monitoring, and whether to support on-demand SSB transmission;

[0146] The second access object of the co-location is a group;

[0147] The second access objects with the same SSB sending period are grouped together.

[0148] Step 202: Select a target access object for performing a first operation from the first access object group and the second access object group according to the first information and the first rule, wherein the first operation includes residency or random access.

[0149] The first rule may be related to at least one of the following:

[0150] One or more access objects that the terminal can randomly access, as indicated or configured by the network-side device;

[0151] The access object to be randomly accessed by the terminal is defaulted to be the first access object;

[0152] Bar status information of the second access object;

[0153] an index value of the second access object;

[0154] a center frequency of the second access object;

[0155] a subcarrier spacing (SCS) of the second access object;

[0156] an identifier of the second access object;

[0157] a frequency interval between the second access object and the first access object;

[0158] Whether the second access object performs normal RACH monitoring;

[0159] Whether the second access object sends SSB normally;

[0160] Whether the second access object satisfies normal RACH monitoring and SSB transmission;

[0161] The number of times a WUS needs to be sent to the second access object;

[0162] the priority of the second access object;

[0163] a signal strength measurement value of a reference signal of the second access object, the signal strength comprising at least one of a reference signal received power (RSRP) and a signal to interference plus noise ratio (SINR);

[0164] Randomly generated access object index;

[0165] a weight value of the second access object;

[0166] Randomly generated access object weight value;

[0167] whether the first access object is a suitable cell;

[0168] Whether the second access object is a suitable cell.

[0169] The priority of the second access object may be explicitly indicated by the network-side device; or the priority of the second access object is related to at least one of the following:

[0170] ① The transmission mode of the second access object includes whether SSB is sent normally, whether SSB is supported on-demand, and whether RACH is monitored normally. For example, the relationship between the priority of the second access object and the transmission mode can be:

[0171] Priority 0: Send SSB normally and monitor RACH normally;

[0172] Priority 1: Abnormal SSB transmission (with the SSB of the first access object as a reference), normal monitoring of RACH;

[0173] Priority 2: Send SSB on demand and monitor RACH normally.

[0174] Priority 3: Send SSB normally and monitor RACH abnormally;

[0175] Priority 4: Abnormal SSB transmission (with the SSB of the first access object as a reference) and abnormal RACH monitoring;

[0176] Priority 5: Send SSB on demand and do not monitor RACH normally.

[0177] It should be noted that, in the above example, the smaller the priority value, the higher the priority.

[0178] ② The frequency band interval between the second access object and the first access object;

[0179] ③The number of the second access object.

[0180] The following two examples illustrate how, in step 202, a target access object for performing the first operation is selected from the first access object and the second access object group based on the first information and the first rule. Other examples will be involved in the specific embodiments below, which will not be described here in detail. See below for details.

[0181] First example

[0182] The selecting, according to the first information and the first rule, a target access object for performing the first operation from the group of the first access object and the second access object may include:

[0183] Determining whether the first access object is a suitable cell;

[0184] If the first access object is a suitable cell, selecting the first access object as a target access object;

[0185] If the first access object is not a suitable cell, executing the first step or the second step;

[0186] Wherein, the first step includes:

[0187] determining, according to a reference signal measurement result corresponding to at least one second access object in the second access object group and part or all of the SIBs of the at least one second access object included in the first information, whether the at least one second access object is a suitable cell;

[0188] In a case where one or more second access objects among the at least one second access object are suitable cells, a suitable cell is selected from the at least one second access object according to a first rule as a target access object for performing the first operation.

[0189] Wherein, the second step includes:

[0190] The second access object is ignored, and other suitable cells are searched as target access objects for performing the first operation.

[0191] Furthermore, searching for another suitable cell as a target access object for performing the first operation may include:

[0192] Searching for a suitable cell from one or more second access objects in the second access object group as a target access object for performing the first operation;

[0193] From one or more third access objects in the third access object group, find a suitable cell as the target access object for performing the first operation, wherein the third access object group includes the access objects in the second access object group that meet the third condition.

[0194] The third condition may include at least one of the following:

[0195] Taking the first access object as a reference;

[0196] co-located with the first access object;

[0197] A continuous access object belonging to the same frequency band as the first access object.

[0198] Second example

[0199] The selecting, according to the first information and the first rule, a target access object for performing the first operation from the group of the first access object and the second access object may include:

[0200] determining, according to the SSB measurement result sent by the first access object and the SIB of the first access object, whether the first access object is a suitable cell;

[0201] determining, according to a reference signal measurement result corresponding to at least one second access object in the second access object group and part or all of the SIBs of the at least one second access object included in the first information, whether the at least one second access object is a suitable cell;

[0202] When the first access object is a suitable cell and one or more of the at least one second access objects are suitable cells, a suitable cell is selected from the first access object and the at least one second access object according to a first rule as the target access object for performing the first operation.

[0203] In an embodiment of the present application, a reference signal corresponding to a second access object may include at least one of reference signals such as SSB, CSI-RS, DRS, and TRS. And when the reference signal is SSB, for a second access object, if SSB is transmitted on the second access object, SSB measurement is directly performed on the second access object to obtain an SSB measurement result; if SSB is not transmitted on the second access object, the SSB measurement result sent on the fourth access object is used as the SSB measurement result of the second access object, wherein the fourth access object may include a reference access object configured for the second access object, an access object co-located with the second access object, and an access object located in the same frequency band and continuous with the second access object; or, if SSB is not transmitted on the second access object, the measurement result of the SSB sent by the second access object after the WUS is successfully triggered is used as the SSB measurement result of the second access object.

[0204] The embodiment shown in Figure 2 provides a random access method. Since the network side device can provide the terminal with first information about the second access object group through the first access object, and the first information includes the system information SIB of the second access object, the terminal can select the target access object to be resided or randomly accessed from the first access object and the second access object group based on the first information and the first rule. The second access object does not need to continuously send information such as SSB and SIB, but sends SSB on demand or performs RACH monitoring on demand. Therefore, while saving energy on the network side, the capacity of the network side can be guaranteed as much as possible.

[0205] Optionally, the target access object belongs to the second access object group, and the first information includes triggering the at least one second access object to send an SSB wake-up signal WUS configuration information, or triggering the SSB adaptive adjustment of the at least one second access object WUS configuration information, and the first information includes triggering the random access channel RACH monitoring of the at least one second access object WUS configuration information, or triggering the RACH monitoring adaptive adjustment of the at least one second access object WUS configuration information. After step 202, before performing the first operation on the target access object, as shown in Figure 3, a random access method provided in an embodiment of the present application may further include:

[0206] Step 203: The terminal sends a wake-up signal WUS to the target access object, wherein the WUS is used to trigger the target access object to send at least one of SSB and monitor RACH.

[0207] In one example, the terminal sends a WUS for the target access object, including: when a first condition is met, the terminal sends a WUS for the target access object.

[0208] The first condition may include at least one of the following:

[0209] 1) The first access object is not a suitable cell;

[0210] 2) The target access object is a suitable cell;

[0211] 3) performing intra-frequency or inter-frequency measurement on the target access object;

[0212] 4) The target access object is in a first energy-saving state, wherein the first energy-saving state includes at least one of not sending SSB, not sending SIB, not monitoring RACH, sending energy-saving SSB (such as Sparse SSB), sending energy-saving SIB (such as Sparse SIB), and energy-saving monitoring RACH (such as Sparse RACH monitoring), and the energy-saving SSB includes one of lightweight SSB, simplified SSB, sparse SSB and long-period SSB;

[0213] 5) The terminal is sensitive to access delay;

[0214] 6) The terminal is in the process of recovering from link failure.

[0215] In another example, before sending the WUS to the target access object, the method may further include: assuming that the target access object is in a second energy-saving state.

[0216] The second energy-saving state may include at least one of the following:

[0217] Do not send SIB, send SSB normally, and perform normal RACH monitoring;

[0218] Not sending an SIB, not sending an SSB, or sending an energy-saving SSB (such as a simplified SSB or a sparse SSB), taking the first access object as a reference, and performing normal RACH monitoring;

[0219] Do not send SIB, send SSB normally, and do not perform normal RACH monitoring;

[0220] No SIB is sent, no SSB is sent, or energy-saving SSB (such as simplified SSB or sparse SSB, etc.) is sent, and normal RACH monitoring is not performed.

[0221] In the first example, the terminal sends a WUS for the target access object, which may include: the terminal sends a WUS for the target access object, and the WUS can be used to achieve two purposes: one is to trigger the target access object to send SSB, and the other is to trigger the target access object to monitor RACH.

[0222] In a second example, the terminal sends a WUS for the target access object, which may include: the terminal sends a first WUS for the target access object, and the first WUS is used to trigger the target access object to send SSB; and the terminal sends a second WUS for the target access object, wherein the second WUS is used to trigger the target access object to monitor RACH.

[0223] Exemplarily, the terminal sending the second WUS for the target access object (the time point of sending the second WUS) includes the following:

[0224] Z time slots / symbols / milliseconds after sending the first WUS, the terminal starts sending a second WUS for the target access object;

[0225] X time slots / symbols / milliseconds after receiving feedback on the first WUS, the terminal starts sending a second WUS for the target access object;

[0226] After receiving the first SSB sent after successfully triggering the target access object, the terminal starts sending a second WUS for the target access object Y time slots / symbols / milliseconds;

[0227] When the number of times the first WUS is sent reaches a maximum value, the terminal sends a second WUS for the target access object;

[0228] After sending the first WUS, a first timer is started. After the first timer times out, the terminal sends a second WUS for the target access object.

[0229] The embodiment shown in Figure 3 provides a random access method, in which the terminal can trigger the second access object to send SSB or perform RACH monitoring on demand (on-demand), instead of continuously sending SSB or continuously performing RACH monitoring, and also instead of not sending SSB or not performing RACH monitoring. Therefore, it is possible to ensure the capacity of the network side as much as possible while saving energy for the network side equipment.

[0230] Optionally, when the WUS is used to trigger SSB transmission, as shown in FIG4 , a random access method provided in an embodiment of the present application may further include:

[0231] The terminal monitors the SSB sent by the target access object.

[0232] It should be noted that regardless of whether the UE sends one WUS or two WUSs (the first WUS and the second WUS) to the target access object, the UE can monitor the position of the SSB. Specifically, when the UE sends one WUS to the target access object, the UE monitors the position of the SSB after sending the WUS; when the UE sends two WUSs (the first WUS and the second WUS) to the target access object, the UE can monitor the position of the SSB after sending the first WUS.

[0233] Specifically, the terminal monitoring the SSB sent by the target access object (the time point of monitoring the SSB sent by the target access object) may include the following:

[0234] After sending the WUS, starting a third timer, after the third timer times out, the terminal starts to monitor the SSB sent by the target access object;

[0235] After sending the WUS, the terminal starts to monitor the SSB sent by the target access object C time slots / symbols / milliseconds later;

[0236] In the next time slot after sending the WUS, the terminal starts to monitor the SSB sent by the target access object;

[0237] Within the SSB listening window configured in the first information, the terminal listens to the SSB sent by the target access object.

[0238] The embodiment shown in FIG4 provides a random access method, wherein the terminal can trigger the target access object (a second access object) to send SSB on demand (on-demand), thereby preparing for RACH at the target access object, thereby increasing the capacity on the network side.

[0239] Optionally, as shown in FIG5 , a random access method provided in an embodiment of the present application may further include:

[0240] Step 205: The terminal initiates the first operation to the target access object.

[0241] In the case where the UE sends one WUS to the target access object, the UE initiates the first operation to the target access object after sending the WUS; in the case where the UE sends two WUSs (the first WUS and the second WUS) to the target access object, the UE may initiate the first operation to the target access object after sending the second WUS. Specifically, the target access object is a second access object, and step 205 (the time point of initiating the first operation to the target access object) may specifically include the following:

[0242] After sending the WUS to the target access object, a second timer is started. After the second timer times out, the terminal initiates the first operation to the target access object (such as initiating RACH. Accordingly, the WUS may be the same WUS used to trigger SSB sending and RACH monitoring, or the second WUS);

[0243] A time slots / symbols / milliseconds after sending the WUS to the target access object, the terminal initiates the first operation to the target access object (such as initiating RACH, and accordingly, the WUS may be the same WUS used to trigger SSB transmission and RACH monitoring, or the second WUS);

[0244] B time slots / symbols / milliseconds after receiving feedback from the WUS for the target access object, the terminal initiates the first operation to the target access object (such as initiating RACH, and accordingly, the WUS can be the same WUS used to trigger SSB transmission and RACH monitoring, or it can be the above-mentioned second WUS).

[0245] Optionally, a random access method provided in an embodiment of the present application may further include:

[0246] When the second condition is met, the terminal sends the wake-up signal WUS to the target access object again.

[0247] The second condition may include but is not limited to at least one of the following:

[0248] 1)SSB detection failed;

[0249] 2) The number of random accesses reaches the maximum value;

[0250] The number of WUS transmissions is less than or equal to the preset maximum number of transmissions;

[0251] 3) No feedback was received for the previous WUS;

[0252] 4) The previous WUS is used to trigger the sending of SSB. After receiving the feedback for the previous WUS signal, another WUS is sent to trigger RACH monitoring (that is, the WUS is sent again to trigger RACH monitoring);

[0253] 5) No feedback for the previous WUS is received before the timer expires.

[0254] Optionally, the resent WUS signal has at least one of the following characteristics:

[0255] 1) Signal power increases;

[0256] 2) The time interval between the sending of the last WUS is greater than the preset time interval;

[0257] 3) Frequency domain resources and sequence resources are the same as those of the previous WUS.

[0258] It should be noted that the triggering of SSB transmission, triggering SSB adaptation, triggering normal SSB transmission, triggering SSB to return to normal transmission mode, etc. involved in the embodiments of the present application have the same meaning, which all means triggering the second access object to change from an abnormal SSB transmission mode (long-period SSB transmission mode, simplified SSB transmission mode, or on-demand SSB transmission mode) to a normal SSB transmission mode.

[0259] It should also be noted that SIB1 and SIB involved in the embodiments of the present application both refer to system information blocks (System Information Block), and SIB1 is an example of SIB.

[0260] The following describes an application of a random access method provided in an embodiment of the present application in conjunction with specific embodiments.

[0261] Example 1

[0262] Assume that the terminal obtains the first information of Cell1, Cell2, and Cell3 in the second access object group, the second carrier group, on the first access object, the first carrier Cell 0 (anchor carrier). That is, the SIB of the first carrier includes the system information of the second carrier group.

[0263] In the scenario 0 mentioned above (the second carrier sends SSB normally and performs normal RACH monitoring), the first carrier is configured with the SIB corresponding to each second carrier in the second carrier group, and all second carriers in the second carrier group send SSB normally and perform normal RACH monitoring. Specifically:

[0264] Cell 0: belongs to band 0 (anchor carrier), sends SSBs normally, and carries the SIBs of other carriers (Cell 1, Cell 2, Cell 3) in the SIBs;

[0265] Cell 1: Belongs to Band 1, sends SSB normally and monitors RACH normally, does not send SIB1

[0266] Cell 2: Belongs to Band 1, sends SSB normally and monitors RACH normally, but does not send SIB1

[0267] Cell 3: Belongs to Band 2, sends SSB normally and monitors RACH normally, but does not send SIB1

[0268] In an example, the first information about the second carrier group sent by the network-side device through the first carrier may include: the SIB of each second carrier in the second carrier group.

[0269] The SIB of the second carrier included in the first information may include at least one of the following:

[0270] All or part of the SIBs of the second carrier, where the part of the SIBs may include at least one of: public land mobile network (PLMN) information, configuration information related to cell selection criteria, configuration information related to cell reselection criteria, and cell barring information;

[0271] The SIB1 status information of the second carrier includes at least one of: SIB1 is not sent and SIB1 is carried by system information of the first carrier.

[0272] In an example, the first information about the second carrier group sent by the network-side device through the first carrier may include, in addition to the system information of the second carrier, at least one of the following:

[0273] 1) Configuration information related to the SSB currently being sent by the at least one second carrier may specifically include at least one of the following:

[0274] whether the at least one second carrier is transmitting SSB;

[0275] at least one of a frequency of the SSB being transmitted by the at least one second carrier, an SSB transmission period, and the number of SSBs in one transmission period;

[0276] The at least one second carrier is sending a transmission mode of the SSB, and the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, a compact transmission mode, a long-cycle transmission mode (the transmission cycle of the SSB is long) and an on-demand transmission mode, wherein the energy-saving transmission mode can be a simplified transmission mode that only sends a primary synchronization signal (PSS) and a secondary synchronization signal (SSS), and the compact transmission mode can be a transmission mode in which there is no time domain gap between multiple SSBs.

[0277] 2) Configuration information related to the RACH monitoring behavior currently in which the at least one second carrier is located may specifically include at least one of the following:

[0278] whether the at least one second carrier performs RACH monitoring;

[0279] at least one of a transmission period of the RACH being monitored by the at least one second carrier, the number of RACHs in one transmission period, RACH frequency domain resource configuration information, and RACH time domain resource configuration information;

[0280] The at least one second carrier monitors the RACH monitoring mode, and the monitoring mode includes one of a normal monitoring mode, a simplified monitoring mode (for example, a reduced RO transmission opportunity), an aggregated monitoring mode, and an on-demand monitoring mode, wherein the simplified monitoring mode may include a reduced RO transmission opportunity, and the aggregated monitoring mode may be a monitoring mode with no time domain gap between multiple ROs, and RO is the abbreviation of physical random access channel opportunity (PRACH Occasion).

[0281] 3) The characteristic information of the at least one second carrier itself may specifically include at least one of the following:

[0282] identification information (such as an index or a cell identifier) ​​of the at least one second carrier;

[0283] Whether the at least one second carrier is in a prohibited Bar state;

[0284] The priority of the at least one second carrier when the UE performs random access channel selection;

[0285] whether the at least one second carrier is set to a Bar state for a first type of UE, where the first type includes at least one of reduced capability (Redcap), non-terrestrial network (NTN), and support for a Network Energy Saving (NES) function;

[0286] The characteristic value N of the UE ID that allows random access to the at least one second carrier, for example, a UE with UE ID mod number of carriers=N can perform random access on the carrier;

[0287] whether the at least one second carrier supports UE camping;

[0288] Whether the at least one second carrier is a suitable cell;

[0289] Whether the at least one second carrier supports cell selection and / or cell reselection.

[0290] In some embodiments, the first information may be sent by the first carrier through a broadcast message; or, the first information is assumed to be the same as the corresponding information of the first carrier; or, when the first information is not configured, it is assumed to be the same as the corresponding information of the first carrier, for example, at least one of the PLMN information corresponding to the second carrier, the relevant configuration information of the cell selection criteria, the relevant configuration information of the cell reselection criteria, and the cell barring (Cell Bar) information is the same as that of the first carrier.

[0291] In some embodiments, if the first information does not include relevant information about SSB, SIB1 or RACH monitoring currently being sent by a second carrier, it is assumed that the SSB transmission, SIB1 transmission and RACH monitoring of the second carrier are in a normal state, or are the same as the corresponding information of the first carrier.

[0292] In some embodiments, when selecting a cell to perform the first operation, although there is a special carrier (a second carrier that has obtained information from the first carrier), the first carrier is still selected first.

[0293] In some embodiments, after the UE detects the first carrier and obtains the first information, if the first carrier is determined to be a suitable cell, the UE does not send a WUS and selects the first carrier for monitor paging;

[0294] If the first carrier is determined not to be a Suitable Cell, perform at least one of the following:

[0295] ■Judge based on partial SIB information and SSB measurement results: The UE selects one or more second carriers in the second carrier group as the target cell according to the first rule, and judges whether the one or more second carriers are suitable cells based on the information corresponding to the second carrier (such as configuration information related to cell selection or cell reselection) and the SSB measurement results.

[0296] ◆If at least one carrier is a suitable cell, the UE selects one of the second carriers for monitoring paging according to the first rule.

[0297] ■ Judging based on SIB1 and SSB measurement results: The UE selects one or more second carriers in the second carrier group as target cells according to the first rule, and judges whether the one or more second carriers are suitable cells based on the SIB1 corresponding to the second carriers (carried in the system information of the first carrier) and the SSB measurement results.

[0298] ◆If at least one carrier is suitable, the UE selects one of the carriers for monitor paging according to the first rule.

[0299] ■The UE ignores the second carrier group and seeks other suitable cells.

[0300] It should be noted that the reference signal corresponding to a second carrier may include at least one of reference signals such as SSB, CSI-RS, DRS and TRS. And when the reference signal is SSB, for a second carrier, if SSB is transmitted on the second carrier, SSB measurement is directly performed on the second carrier to obtain the SSB measurement result; if there is no SSB transmission on the second carrier, the SSB measurement result sent on the fourth carrier is used as the SSB measurement result of the second carrier, wherein the fourth carrier may include a reference carrier configured for the second carrier, a carrier co-located with the second carrier, and a carrier that is in the same frequency band and continuous with the second carrier, or, if there is no SSB transmission on the second carrier, the measurement result of the SSB sent by the second carrier after the WUS is successfully triggered is used as the SSB measurement result of the second carrier (the same below, no further details).

[0301] Optionally, in some embodiments, the UE performs at least one of the following to determine a target carrier for performing the first operation:

[0302] ■The UE selects the first carrier and one or more carriers in the second carrier group as target cells according to the first rule: for the first carrier, it determines whether it is a suitable cell based on the SSB measurement result and the SIB1 configuration; for the carriers in the second carrier group, it determines whether the one or more carriers are suitable cells based on the information corresponding to the carrier (such as configuration information related to cell selection or cell reselection) and the SSB measurement result.

[0303] ◆If at least one carrier is a suitable cell, the UE selects one of the carriers to camp on according to the first rule.

[0304] ■The UE selects the first carrier and one or more carriers in the second carrier group as target cells according to the first rule: for the first carrier, it determines whether it is a suitable cell based on the SSB measurement result and SIB1 configuration; for the carriers in the second carrier group, it determines whether the one or more carriers are suitable cells based on the SIB1 corresponding to the carrier (carried by the system information of the first carrier) and the SSB measurement result.

[0305] ◆If at least one carrier is a suitable cell, the UE selects one of the carriers to camp on according to the first rule.

[0306] In some embodiments, the carriers of the second carrier group do not allow the UE to camp on them according to protocol provisions.

[0307] In some embodiments, the UE determines whether it can camp on the UE based on whether the information corresponding to the second carrier group sent on the first carrier contains paging configuration information.

[0308] In some embodiments, for a UE residing on a first carrier, intra-frequency and inter-frequency measurements are performed according to the configuration information of the first carrier. If one carrier in the second carrier group is determined to be the highest ranked cell or the target cell for cell reselection, the UE further determines whether the cell is a suitable cell. If it is a suitable cell, the UE performs cell reselection and resides in the cell based on the SIB1 obtained from the first carrier.

[0309] In some embodiments, for a UE residing on a first carrier, if there is a need for random access, the UE directly initiates a RACH on the first carrier for random access by default.

[0310] In some embodiments, for a UE residing on a first carrier, if there is a need for random access, the UE selects a target carrier for random access from the first carrier and the second carrier group according to a first rule:

[0311] 1) If the selected target carrier is the first carrier, RACH is directly initiated for random access;

[0312] 2) If the selected target carrier is a carrier of the second carrier group, the UE initiates RACH on the carrier for random access according to the SIB1 of the target carrier obtained on the first carrier.

[0313] In some embodiments, the first rule includes: the UE screening out a target carrier that meets a condition, where the condition includes at least one of the following:

[0314] The target carrier is not in the bar state for the UE;

[0315] The RSRP / RSRQ measured on the target carrier meets certain conditions, such as being greater than or equal to a threshold;

[0316] The target carrier is a suitable cell for the UE.

[0317] In some embodiments, the UE selects a target carrier from all carriers (the first carrier and / or the second carrier group) or all filtered carriers, including at least one of the following:

[0318] Randomly select the target carrier;

[0319] A weight value p is randomly generated, and each carrier is sequentially configured with a corresponding weight value p(1), p(2), ..., and when p is in the range between p(0)+p(1)+...+p(i-1) and p(0)+p(1)+...+p(i), carrier i is selected as the target carrier;

[0320] The network side indicates / configures the target carrier for the UE to perform random access;

[0321] Selecting the carrier with the largest or smallest carrier index as the target carrier;

[0322] Select the carrier with the largest, smallest or middle center frequency as the target carrier;

[0323] Select the carrier with the largest or smallest SCS as the target carrier;

[0324] Selecting a second carrier with the smallest frequency interval from the first carrier as the target carrier;

[0325] Select the carrier that needs to send the least number of WUS as the target carrier;

[0326] Select the carrier with the highest priority as the target carrier;

[0327] The carrier with the largest RSRP / SINR measurement value of the reference signal is selected as the target carrier.

[0328] In the scenario 1 mentioned above (the second carrier does not send SSB and performs normal RACH monitoring), the SIB corresponding to each second carrier in the second carrier group is configured on the first carrier, at least one second carrier in the second carrier group does not send SSB and the at least one second carrier has a reference carrier, and each second carrier in the second carrier group performs normal RACH monitoring. Specifically:

[0329] Cell 0: belongs to band 0 (anchor carrier), sends SSBs normally, and carries the SIBs of other carriers (Cell 1, Cell 2, Cell 3) in the SIBs;

[0330] Cell 1: belongs to Band 1, does not send SSB (with the first carrier as the reference), performs normal RACH monitoring, and does not send SIB1;

[0331] Cell 2: Belongs to Band 1, sends SSBs and monitors RACH normally, but does not send SIB1.

[0332] Cell 3: belongs to Band 2, does not send SSB (with Cell 2 as a reference), performs normal RACH monitoring, and does not send SIB1.

[0333] In an example, the first information about the second carrier group sent by the network-side device through the first carrier may include: the SIB of each second carrier in the second carrier group.

[0334] The SIB of the second carrier included in the first information may include at least one of the following:

[0335] All or part of the SIBs of the second carrier, where the part of the SIBs may include at least one of: public land mobile network (PLMN) information, configuration information related to cell selection criteria, configuration information related to cell reselection criteria, and cell barring information;

[0336] The SIB1 status information of the second carrier includes at least one of: SIB1 is not sent and SIB1 is carried by system information of the first carrier.

[0337] In an example, the first information about the second carrier group sent by the network-side device through the first carrier may include, in addition to the system information of the second carrier, at least one of the following:

[0338] 1) Configuration information related to the SSB currently being sent by the at least one second carrier may specifically include at least one of the following:

[0339] whether the at least one second carrier is transmitting SSB;

[0340] at least one of a frequency of the SSB being transmitted by the at least one second carrier, an SSB transmission period, and the number of SSBs in one transmission period;

[0341] The at least one second carrier is sending a transmission mode of the SSB, and the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, a compact transmission mode, a long-cycle transmission mode (the transmission cycle of the SSB is long) and an on-demand transmission mode, wherein the energy-saving transmission mode can be a simplified transmission mode that only sends a primary synchronization signal (PSS) and a secondary synchronization signal (SSS), and the compact transmission mode can be a transmission mode in which there is no time domain gap between multiple SSBs.

[0342] 2) Configuration information related to the RACH monitoring behavior currently in which the at least one second carrier is located may specifically include at least one of the following:

[0343] whether the at least one second carrier performs RACH monitoring;

[0344] at least one of a transmission period of the RACH being monitored by the at least one second carrier, the number of RACHs in one transmission period, RACH frequency domain resource configuration information, and RACH time domain resource configuration information;

[0345] The at least one second carrier monitors the RACH monitoring mode, and the monitoring mode includes one of a normal monitoring mode, a simplified monitoring mode (for example, a reduced RO transmission opportunity), an aggregated monitoring mode, and an on-demand monitoring mode, wherein the simplified monitoring mode may include a reduced RO transmission opportunity, and the aggregated monitoring mode may be a monitoring mode with no time domain gap between multiple ROs, and RO is the abbreviation of physical random access channel opportunity (PRACH Occasion).

[0346] 3) The characteristic information of the at least one second carrier itself may specifically include at least one of the following:

[0347] identification information of the at least one second carrier;

[0348] whether the at least one second carrier can use the first carrier as a reference carrier;

[0349] whether the at least one second carrier is co-located with the first carrier;

[0350] whether the at least one second carrier is located in a TAG with the first carrier;

[0351] whether the at least one second carrier has a QCL relationship with the first carrier;

[0352] a reference carrier of the at least one second carrier;

[0353] a carrier co-located with the at least one second carrier;

[0354] a carrier located in the same TAG as the at least one second carrier;

[0355] a carrier having a QCL relationship with the at least one second carrier;

[0356] Whether the at least one second carrier is in a prohibited Bar state;

[0357] The priority of the at least one second carrier when the UE performs random access channel selection;

[0358] whether the at least one second carrier is set to a Bar state for a first type of UE, where the first type includes at least one of reduced capability (Redcap), non-terrestrial network (NTN), and support for a Network Energy Saving (NES) function;

[0359] The characteristic value N of the UE ID that allows random access to the at least one second carrier, for example, a UE with UE ID mod number of carriers=N can perform random access on the carrier;

[0360] whether the at least one second carrier supports UE camping;

[0361] Whether the at least one second carrier is a suitable cell;

[0362] Whether the at least one second carrier supports cell selection and / or cell reselection.

[0363] In some embodiments, the first information may be sent by the first carrier through a broadcast message; or, the first information is assumed to be the same as the corresponding information of the first carrier; or, when the first information is not configured, it is assumed to be the same as the corresponding information of the first carrier, for example, at least one of the PLMN information corresponding to the second carrier, the relevant configuration information of the cell selection criteria, the relevant configuration information of the cell reselection criteria, and the cell barring (Cell Bar) information is the same as that of the first carrier.

[0364] In some embodiments, after the UE detects the first carrier and obtains the first information, if the first carrier is determined to be a suitable cell, the UE does not send a WUS, selects the first carrier for monitor paging, or selects a carrier from the first carrier and / or the third carrier group for monitor paging according to a first rule:

[0365] ■ the third carrier group includes one of a carrier that uses the first carrier as a reference cell, is co-located with the first carrier, and is on the same frequency band as the first carrier and is continuous with each other;

[0366] If the first carrier is determined not to be a suitable cell, perform at least one of the following:

[0367] ■The UE selects one or more second carriers in the second carrier group as target cells according to the first rule, and determines whether the one or more second carriers are suitable cells based on the information corresponding to the second carrier (such as configuration information related to cell selection or cell reselection) and the SSB measurement result.

[0368] ◆If at least one second carrier is a suitable cell, the UE selects one of the second carriers for monitoring paging according to the first rule.

[0369] ■The UE selects one or more second carriers in the second carrier group as target cells according to the first rule, and determines whether the one or more second carriers are suitable cells based on the SIB1 corresponding to the second carrier (carried by the system information of the first carrier) and the SSB measurement result.

[0370] ◆If at least one second carrier is a suitable cell, the UE selects one of the second carriers for monitoring paging according to the first rule.

[0371] ■The UE ignores the second carrier group and seeks other suitable cells.

[0372] Optionally, in some embodiments, the UE performs one of the following to determine a target carrier for performing the first operation:

[0373] ■The UE selects one or more carriers in the first carrier group and the second carrier group according to the first rule: for the first carrier, the UE determines whether it is a suitable cell based on the SSB measurement result and the SIB1 configuration; for the carriers in the second carrier group, the UE determines whether the one or more carriers are suitable cells based on the SSB measurement result and the SIB1 corresponding to the carrier (carried in the system information of the first carrier);

[0374] ◆If at least one carrier is a suitable cell, the UE selects one of the carriers for monitor paging according to the first rule.

[0375] ■The UE selects the first carrier and one or more carriers in the second carrier group as target cells according to the first rule: for the first carrier, it determines whether it is a suitable cell based on the SSB measurement result and the SIB1 configuration; for the carriers in the second carrier group, it determines whether the one or more carriers are suitable cells based on the information corresponding to the carrier (such as configuration information related to cell selection or cell reselection) and the SSB measurement result.

[0376] ◆If at least one carrier is a suitable cell, the UE selects one of the carriers for monitor paging according to the first rule.

[0377] It should be noted that for the SSB measurement results, if SSB is sent on the carrier, SSB measurement is performed on the carrier to obtain the SSB measurement result; otherwise, measurement is performed on the SSB sent on the reference carrier / co-located carrier / carriers located in the same frequency band and continuous with each other configured for the carrier as the SSB measurement result corresponding to the carrier.

[0378] In some embodiments, for a UE camped on a first carrier, intra-frequency and inter-frequency measurements are performed according to the configuration information of the first carrier, and if a second carrier in a second carrier group is determined to be a highest ranked cell or a target cell for cell reselection, then:

[0379] Determining whether the second carrier is a suitable cell based on the SIB1 of the second carrier obtained from the first carrier, and if so, performing cell reselection and residing on the second carrier;

[0380] It is determined whether the second carrier is a suitable cell. If so, the UE performs cell reselection and resides on the second carrier.

[0381] In some embodiments, for a UE residing on a first carrier, if there is a need for random access, the UE directly initiates a RACH on the first carrier for random access by default.

[0382] In some embodiments, for a UE residing on a first carrier, if there is a need for random access, the UE selects a target carrier for random access from the first carrier and the second carrier group according to a first rule:

[0383] 1) If the selected target carrier is the first carrier, RACH is directly initiated for random access;

[0384] 2) If the selected target carrier is a carrier of the second carrier group, the UE initiates RACH on the carrier for random access according to the SIB1 of the target carrier obtained on the first carrier.

[0385] In some embodiments, the first rule includes: the UE screening out a target carrier that meets a condition, where the condition includes at least one of the following:

[0386] The target carrier is not in the bar state for the UE;

[0387] The RSRP / RSRQ measured on the target carrier meets certain conditions, such as being greater than or equal to a threshold;

[0388] The target carrier is a suitable cell for the UE.

[0389] In some embodiments, the UE selects a target carrier from all carriers (the first carrier and / or the second carrier group) or all filtered carriers, including at least one of the following:

[0390] Randomly select the target carrier;

[0391] A weight value p is randomly generated, and each carrier is sequentially configured with a corresponding weight value p(1), p(2), ..., and when p is in the range between p(0)+p(1)+...+p(i-1) and p(0)+p(1)+...+p(i), carrier i is selected as the target carrier;

[0392] The network side indicates / configures the target carrier for the UE to perform random access;

[0393] Selecting the carrier with the largest or smallest carrier index as the target carrier;

[0394] Select the carrier with the largest, smallest or middle center frequency as the target carrier;

[0395] Select the carrier with the largest or smallest SCS as the target carrier;

[0396] Selecting a second carrier with the smallest frequency interval from the first carrier as the target carrier;

[0397] Select the carrier that needs to send the least number of WUS as the target carrier;

[0398] Select the carrier with the highest priority as the target carrier;

[0399] The carrier with the largest RSRP / SINR measurement value of the reference signal is selected as the target carrier.

[0400] In the scenario 2 mentioned above (the second carrier does not send SSB and performs normal RACH monitoring), the first carrier is configured with the SIB corresponding to each second carrier in the second carrier group and the WUS configuration that triggers SSB transmission, at least one second carrier in the second carrier group does not send SSB (in the on-demand SSB transmission mode), and each second carrier in the second carrier group performs normal RACH monitoring. Specifically:

[0401] Cell 0: belongs to band 0 (anchor carrier), sends SSBs normally, and carries the SIBs of other carriers (Cell 1, Cell 2, Cell 3) in the SIBs;

[0402] Cell 1: belongs to Band 1, does not send SSB (is in on-demand SSB mode), performs normal RACH monitoring, and does not send SIB1;

[0403] Cell 2: Belongs to Band 1, sends SSBs and monitors RACH normally, but does not send SIB1.

[0404] Cell 3: belongs to Band 2, does not send SSB (is in on-demand SSB mode), performs normal RACH monitoring, and does not send SIB1.

[0405] In an example, the first information about the second carrier group sent by the network-side device through the first carrier may include: the SIB of each second carrier in the second carrier group.

[0406] The SIB of the second carrier included in the first information may include at least one of the following:

[0407] All or part of the SIBs of the second carrier, where the part of the SIBs may include at least one of: public land mobile network (PLMN) information, configuration information related to cell selection criteria, configuration information related to cell reselection criteria, and cell barring information;

[0408] The SIB1 status information of the second carrier includes at least one of: SIB1 is not sent and SIB1 is carried by system information of the first carrier.

[0409] In an example, the first information about the second carrier group sent by the network-side device through the first carrier may include, in addition to the system information of the second carrier, at least one of the following:

[0410] 1) WUS configuration information for triggering the at least one second carrier to send an SSB, or WUS configuration information for triggering adaptive adjustment of the SSB of the at least one second carrier;

[0411] 2) Configuration information related to the SSB currently being sent by the at least one second carrier may specifically include at least one of the following:

[0412] whether the at least one second carrier is transmitting SSB;

[0413] at least one of a frequency of the SSB being transmitted by the at least one second carrier, an SSB transmission period, and the number of SSBs in one transmission period;

[0414] The at least one second carrier is sending a transmission mode of the SSB, and the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, a compact transmission mode, a long-cycle transmission mode (the transmission cycle of the SSB is long) and an on-demand transmission mode, wherein the energy-saving transmission mode can be a simplified transmission mode that only sends a primary synchronization signal (PSS) and a secondary synchronization signal (SSS), and the compact transmission mode can be a transmission mode in which there is no time domain gap between multiple SSBs.

[0415] 3) Configuration information related to the RACH monitoring behavior currently in which the at least one second carrier is located may specifically include at least one of the following:

[0416] whether the at least one second carrier performs RACH monitoring;

[0417] at least one of a transmission period of the RACH being monitored by the at least one second carrier, the number of RACHs in one transmission period, RACH frequency domain resource configuration information, and RACH time domain resource configuration information;

[0418] The at least one second carrier monitors the RACH monitoring mode, and the monitoring mode includes one of a normal monitoring mode, a simplified monitoring mode (for example, a reduced RO transmission opportunity), an aggregated monitoring mode, and an on-demand monitoring mode, wherein the simplified monitoring mode may include a reduced RO transmission opportunity, and the aggregated monitoring mode may be a monitoring mode with no time domain gap between multiple ROs, and RO is the abbreviation of physical random access channel opportunity (PRACH Occasion).

[0419] 4) SSB configuration information sent after successful WUS triggering, which may include at least one of the following:

[0420] After the WUS is successfully triggered, at least one of the frequency of the at least one second carrier sending the SSB, the period of sending the SSB, and the number of SSBs in one sending period;

[0421] After the WUS is successfully triggered, the at least one second carrier sends a listening window for the SSB, that is, the UE listens to the SSB within the listening window;

[0422] After the WUS is successfully triggered, the at least one second carrier actually sends at least one time domain resource index or the position of at least one time domain resource of the SSB;

[0423] After the WUS is successfully triggered, at least one of the transmission time length, the number of SSB transmission times, and the number of SSB transmission cycles of the at least one second carrier;

[0424] After the WUS is successfully triggered, the relative relationship between the SSB transmitted by the at least one second carrier and the SSB transmitted by the first carrier in at least one of the time domain, frequency domain, and spatial domain;

[0425] After the WUS is successfully triggered, the time domain resource position of the first SSB sent by the at least one second carrier is, for example, sent in the most recent SSB period of X time slots / symbols after the trigger signal (WUS) is sent;

[0426] After the WUS is triggered successfully, the at least one second carrier sends the SSB transmission mode, and the transmission mode includes one of the normal transmission mode, the energy-saving transmission mode (for example, only sending PSS and SSS), the aggregated transmission mode (for example, there is no time domain interval between multiple SSBs), the long-cycle transmission mode (SSB cycle is longer) and the on-demand transmission mode.

[0427] 5) The characteristic information of the at least one second carrier itself may specifically include at least one of the following:

[0428] identification information of the at least one second carrier;

[0429] Whether the at least one second carrier is in a prohibited Bar state;

[0430] The priority of the at least one second carrier when the UE performs random access channel selection;

[0431] whether the at least one second carrier is set to a Bar state for a first type of UE, where the first type includes at least one of reduced capability (Redcap), non-terrestrial network (NTN), and support for a Network Energy Saving (NES) function;

[0432] The characteristic value N of the UE ID that allows random access to the at least one second carrier, for example, a UE with UE ID mod number of carriers=N can perform random access on the carrier;

[0433] whether the at least one second carrier supports UE camping;

[0434] Whether the at least one second carrier is a suitable cell;

[0435] Whether the at least one second carrier supports cell selection and / or cell reselection.

[0436] In some embodiments, the first information may be sent by the first carrier through a broadcast message; or, the first information is assumed to be the same as the corresponding information of the first carrier; or, when the first information is not configured, it is assumed to be the same as the corresponding information of the first carrier, for example, at least one of the PLMN information corresponding to the second carrier, the relevant configuration information of the cell selection criteria, the relevant configuration information of the cell reselection criteria, and the cell barring (Cell Bar) information is the same as that of the first carrier.

[0437] In some embodiments, if the first information does not include relevant information about SSB / RACH monitoring currently being transmitted by the second carrier (a carrier in the second carrier group), it is assumed that the SSB transmission, SIB1 transmission and RACH monitoring of the carrier are in normal state.

[0438] In some embodiments, when the UE performs cell selection, although there is a special carrier (a second carrier whose information has been obtained from the first carrier), the UE still gives priority to the first carrier.

[0439] In some embodiments, after the UE detects the first carrier and obtains the first information, if the first carrier is determined to be a suitable cell, the UE does not send a WUS and selects the first carrier for monitor paging; if the first carrier is determined not to be a suitable cell, the UE:

[0440] ■ Sending a WUS to the second carrier and determining based on the triggered SSB measurement result and SIB1: The UE selects one or more carriers in the second carrier group according to the first rule to send the corresponding WUS and receive SSB, and determines whether the one or more second carriers are suitable cells based on the SSB measurement result after the triggering is successful and the SIB1 information obtained through the first carrier;

[0441] ◆If at least one second carrier is a suitable cell, the UE selects one of the second carriers for monitoring paging according to the first rule.

[0442] ■Send WUS to the second carrier, and judge based on the triggered SSB measurement results and part of the SIB information: The UE selects one or more carriers in the second carrier group according to the first rule to send the corresponding WUS and receive SSB, and judges whether the one or more second carriers are suitable cells based on the information corresponding to the carrier (such as configuration information related to cell selection or cell reselection) and the SSB measurement results.

[0443] ◆If at least one second carrier is a suitable cell, the UE selects one of the second carriers for monitoring paging according to the first rule.

[0444] ■The UE ignores the second carrier group and seeks other suitable cells.

[0445] Optionally, in some embodiments, the UE performs one of the following to determine a target carrier for performing the first operation:

[0446] ■The UE selects one or more carriers in the first carrier group and the second carrier group according to the first rule: for the first carrier, the UE determines whether it is a suitable cell based on the SSB measurement result and the SIB1 configuration; for the carriers in the second carrier group, the UE sends the corresponding WUS to receive the SSB, and determines whether the one or more carriers are suitable cells based on the SSB measurement result and the SIB1 obtained through the first carrier;

[0447] ◆If at least one carrier is a suitable cell, the UE selects one of the carriers for monitor paging according to the first rule.

[0448] ■The UE selects the first carrier and one or more carriers in the second carrier group as target cells according to the first rule: for the first carrier, it determines whether it is a suitable cell based on the SSB measurement result and SIB1 configuration; for the carriers in the second carrier group, it sends the corresponding WUS to receive SSB, and determines whether the one or more carriers are suitable cells based on the SSB measurement result and the information corresponding to the carrier (such as configuration information related to cell selection or cell reselection).

[0449] ◆If at least one carrier is a suitable cell, the UE selects one of the carriers for monitor paging according to the first rule.

[0450] In some embodiments, for a UE camped on a first carrier, intra-frequency and inter-frequency measurements are performed according to the configuration information of the first carrier, and if a second carrier in a second carrier group is determined to be a highest ranked cell or a target cell for cell reselection, then:

[0451] Determining whether the second carrier is a suitable cell based on the SIB1 of the second carrier obtained from the first carrier, and if so, performing cell reselection and residing on the second carrier;

[0452] It is determined whether the second carrier is a suitable cell. If so, the UE performs cell reselection and resides on the second carrier.

[0453] In some embodiments, for a UE residing on a first carrier, if there is a need for random access, the UE directly initiates a RACH on the first carrier for random access by default.

[0454] In some embodiments, for a UE residing on a first carrier, if there is a need for random access, the UE selects a target carrier for random access from the first carrier and the second carrier group according to a first rule:

[0455] 1) If the selected target carrier is the first carrier, RACH is directly initiated for random access;

[0456] 2) If the selected target carrier is a carrier of the second carrier group, the UE initiates RACH on the carrier for random access according to the SIB1 of the target carrier obtained on the first carrier.

[0457] In some embodiments, the first rule includes: the UE screening out a target carrier that meets a condition, where the condition includes at least one of the following:

[0458] The target carrier is not in the bar state for the UE;

[0459] The RSRP / RSRQ measured on the target carrier meets certain conditions, such as being greater than or equal to a threshold;

[0460] The target carrier is a suitable cell for the UE.

[0461] In some embodiments, the UE selects a target carrier from all carriers (the first carrier and / or the second carrier group) or all filtered carriers, including at least one of the following:

[0462] Randomly select the target carrier;

[0463] A weight value p is randomly generated, and each carrier is sequentially configured with a corresponding weight value p(1), p(2), ..., and when p is in the range between p(0)+p(1)+...+p(i-1) and p(0)+p(1)+...+p(i), carrier i is selected as the target carrier;

[0464] The network side indicates / configures the target carrier for the UE to perform random access;

[0465] Selecting the carrier with the largest or smallest carrier index as the target carrier;

[0466] Select the carrier with the largest, smallest or middle center frequency as the target carrier;

[0467] Select the carrier with the largest or smallest SCS as the target carrier;

[0468] Selecting a second carrier with the smallest frequency interval from the first carrier as the target carrier;

[0469] Select the carrier that needs to send the least number of WUS as the target carrier;

[0470] Select the carrier with the highest priority as the target carrier;

[0471] The carrier with the largest RSRP / SINR measurement value of the reference signal is selected as the target carrier.

[0472] In the scenario 3 mentioned above (the second carrier does not send SSB (with reference carrier) and does not perform normal RACH monitoring), the first carrier is configured with the SIB corresponding to each second carrier in the second carrier group and the WUS configuration that triggers RACH monitoring, at least one second carrier in the second carrier group does not send SSB (with the first carrier as a reference), and each second carrier in the second carrier group does not perform normal RACH monitoring. Specifically:

[0473] Cell 0: belongs to band 0 (anchor carrier), sends SSBs normally, and carries the SIBs of other carriers (Cell 1, Cell 2, Cell 3) in the SIBs;

[0474] Cell 1: belongs to Band 1, sends SSB normally, does not monitor RACH normally, and does not send SIB1;

[0475] Cell 2: belongs to Band 1, does not send SSB (with the first carrier as the reference), does not perform normal RACH monitoring, and does not send SIB1;

[0476] Cell 3: belongs to Band 2, sends SSB normally (with Cell 1 as the reference carrier), does not perform normal RACH monitoring, and does not send SIB1.

[0477] In an example, the first information about the second carrier group sent by the network-side device through the first carrier may include: the SIB of each second carrier in the second carrier group.

[0478] The SIB of the second carrier included in the first information may include at least one of the following:

[0479] All or part of the SIBs of the second carrier, where the part of the SIBs may include at least one of: public land mobile network (PLMN) information, configuration information related to cell selection criteria, configuration information related to cell reselection criteria, and cell barring information;

[0480] The SIB1 status information of the second carrier includes at least one of: SIB1 is not sent and SIB1 is carried by system information of the first carrier.

[0481] In an example, the first information about the second carrier group sent by the network-side device through the first carrier may include, in addition to the system information of the second carrier, at least one of the following:

[0482] 1) WUS configuration information for triggering RACH monitoring of the at least one second carrier, or WUS configuration information for triggering RACH monitoring adaptive adjustment of the at least one second carrier;

[0483] 2) Configuration information related to the SSB currently being sent by the at least one second carrier may specifically include at least one of the following:

[0484] whether the at least one second carrier is transmitting SSB;

[0485] at least one of a frequency of the SSB being transmitted by the at least one second carrier, an SSB transmission period, and the number of SSBs in one transmission period;

[0486] The at least one second carrier is sending a transmission mode of the SSB, and the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, a compact transmission mode, a long-cycle transmission mode (the transmission cycle of the SSB is long) and an on-demand transmission mode, wherein the energy-saving transmission mode can be a simplified transmission mode that only sends a primary synchronization signal (PSS) and a secondary synchronization signal (SSS), and the compact transmission mode can be a transmission mode in which there is no time domain gap between multiple SSBs.

[0487] 3) Configuration information related to RACH monitoring after successful WUS triggering, which may include:

[0488] After the WUS is triggered successfully, the at least one second carrier monitors at least one of the RACH period, the number of monitored RACHs, the frequency domain resource configuration information of the monitored RACH, the time domain resource configuration information of the monitored RACH, and the monitoring mode of the monitored RACH, wherein the monitoring mode includes a normal monitoring mode, a simplified monitoring mode (for example, reducing RO opportunities), an aggregated monitoring mode (no time domain interval between multiple ROs), and an on-demand monitoring mode.

[0489] 4) The characteristic information of the at least one second carrier itself may specifically include at least one of the following:

[0490] identification information of the at least one second carrier;

[0491] whether the at least one second carrier can use the first carrier as a reference carrier;

[0492] whether the at least one second carrier is co-located with the first carrier;

[0493] whether the at least one second carrier is located in the same TAG as the first carrier;

[0494] whether the at least one second carrier has a QCL relationship with the first carrier;

[0495] a reference carrier of the at least one second carrier;

[0496] a carrier co-located with the at least one second carrier;

[0497] a carrier located in the same TAG as the at least one second carrier;

[0498] a carrier having a QCL relationship with the at least one second carrier;

[0499] Whether the at least one second carrier is in a prohibited Bar state;

[0500] The priority of the at least one second carrier when the UE performs random access channel selection;

[0501] whether the at least one second carrier is set to a Bar state for a first type of UE, where the first type includes at least one of reduced capability (Redcap), non-terrestrial network (NTN), and support for a Network Energy Saving (NES) function;

[0502] The characteristic value N of the UE ID that allows random access to the at least one second carrier, for example, a UE with UE ID mod number of carriers=N can perform random access on the carrier;

[0503] whether the at least one second carrier supports UE camping;

[0504] Whether the at least one second carrier is a suitable cell;

[0505] Whether the at least one second carrier supports cell selection and / or cell reselection.

[0506] In some embodiments, the first information may be sent by the first carrier through a broadcast message; or, the first information is assumed to be the same as the corresponding information of the first carrier; or, when the first information is not configured, it is assumed to be the same as the corresponding information of the first carrier, for example, at least one of the PLMN information corresponding to the second carrier, the relevant configuration information of the cell selection criteria, the relevant configuration information of the cell reselection criteria, and the cell barring (Cell Bar) information is the same as that of the first carrier.

[0507] In some embodiments, when the UE performs cell selection, although there is a special carrier (a second carrier whose information has been obtained from the first carrier), the UE still gives priority to the first carrier.

[0508] In some embodiments, after the UE detects the first carrier and obtains the first information, if the first carrier is determined to be a suitable cell, the UE does not send a WUS and selects the first carrier for monitoring paging; if the first carrier is determined not to be a suitable cell, the UE selects the second carrier for monitoring paging, or selects a carrier from the first carrier and / or the third carrier group according to the first rule for monitoring paging:

[0509] ■ The third carrier group includes at least one of a carrier that uses the first carrier as a reference cell, is co-located with the first carrier, and is on the same frequency band as the first carrier and is continuous with each other.

[0510] If the first carrier is determined not to be a suitable cell, perform at least one of the following:

[0511] ■The UE selects one or more carriers in the second carrier group as target cells according to the first rule, and determines whether the one or more carriers are suitable cells based on the SIB1 corresponding to the carrier (carried by the system information of the first carrier) and the SSB measurement result.

[0512] ◆If at least one carrier is a suitable cell, the UE selects one of the carriers for monitor paging according to the first rule.

[0513] ■The UE selects one or more carriers in the second carrier group as target cells according to the first rule, and determines whether the one or more carriers are suitable cells based on the information corresponding to the carrier (such as configuration information related to cell selection or cell reselection) and the SSB measurement results.

[0514] ◆If at least one carrier is a suitable cell, the UE selects one of the carriers for monitor paging according to the first rule.

[0515] ■The UE ignores the second carrier group and seeks other suitable cells.

[0516] Optionally, in some embodiments, the UE performs one of the following to determine a target carrier for performing the first operation:

[0517] ■ The UE selects the first carrier and one or more carriers in the second carrier group according to the first rule: for the first carrier, the UE determines whether it is a suitable cell based on the SSB measurement result and the SIB1 configuration; for the carriers in the second carrier group, the UE determines whether the one or more carriers are suitable cells based on the SSB measurement result and the SIB1 of the carrier (carried in the system information of the first carrier);

[0518] ◆If at least one carrier is a suitable cell, the UE selects one of the carriers for monitor paging according to the first rule.

[0519] ■The UE selects the first carrier and one or more carriers in the second carrier group as target cells according to the first rule: for the first carrier, it determines whether it is a suitable cell based on the SSB measurement result and SIB1 configuration; for the carriers in the second carrier group, it determines whether the one or more carriers are suitable cells based on the information corresponding to the carrier (such as configuration information related to cell selection or cell reselection) and the SSB measurement result.

[0520] ◆If at least one carrier is a suitable cell, the UE selects one of the carriers for monitor paging according to the first rule.

[0521] In some embodiments, for a UE residing on a first carrier, intra-frequency and inter-frequency measurements are performed according to the configuration information of the first carrier. If a second carrier in the second carrier group is determined to be the highest ranked cell or the target cell for cell reselection, the UE determines whether the cell is a suitable cell based on the SSB measurement result and the system information of the carrier obtained from the first carrier. If it is a suitable cell, cell reselection is performed and the UE resides in the cell.

[0522] In some embodiments, for a UE residing on a first carrier, if there is a need for random access, the UE directly initiates a RACH on the first carrier for random access by default.

[0523] In some embodiments, for a UE residing on a first carrier, if there is a need for random access, the UE selects a target carrier for random access from the first carrier and the second carrier group according to a first rule:

[0524] 1) If the selected target carrier is the first carrier, RACH is directly initiated for random access;

[0525] 2) If the selected target carrier is a carrier of the second carrier group, the UE first sends a WUS to trigger RACH monitoring of the target carrier, and then initiates RACH random access on the carrier according to the SIB1 configuration of the carrier obtained through the first carrier.

[0526] In some embodiments, the first rule includes: the UE screening out a target carrier that meets a condition, where the condition includes at least one of the following:

[0527] The target carrier is not in the bar state for the UE;

[0528] The RSRP / RSRQ measured on the target carrier meets certain conditions, such as being greater than or equal to a threshold;

[0529] The target carrier is a suitable cell for the UE.

[0530] In some embodiments, the UE selects a target carrier from all carriers (the first carrier and / or the second carrier group) or all filtered carriers, including at least one of the following:

[0531] Randomly select the target carrier;

[0532] A weight value p is randomly generated, and each carrier is sequentially configured with a corresponding weight value p(1), p(2), ..., and when p is in the range between p(0)+p(1)+...+p(i-1) and p(0)+p(1)+...+p(i), carrier i is selected as the target carrier;

[0533] The network side indicates / configures the target carrier for the UE to perform random access;

[0534] Selecting the carrier with the largest or smallest carrier index as the target carrier;

[0535] Select the carrier with the largest, smallest or middle center frequency as the target carrier;

[0536] Select the carrier with the largest or smallest SCS as the target carrier;

[0537] Selecting a second carrier with the smallest frequency interval from the first carrier as the target carrier;

[0538] Select the carrier that needs to send the least number of WUS as the target carrier;

[0539] Select the carrier with the highest priority as the target carrier;

[0540] The carrier with the largest RSRP / SINR measurement value of the reference signal is selected as the target carrier.

[0541] In the scenario 4 mentioned above (the second carrier does not send SSB and does not perform normal RACH monitoring), the first carrier is configured with the SIB corresponding to each second carrier in the second carrier group and the WUS configuration that triggers SSB transmission and RACH monitoring. At least one second carrier in the second carrier group does not send SSB (SSB transmission mode on demand), and each second carrier in the second carrier group does not perform normal RACH monitoring. Specifically:

[0542] Cell 0: belongs to band 0 (anchor carrier), sends SSBs normally, and carries the SIBs of other carriers (Cell 1, Cell 2, Cell 3) in the SIBs;

[0543] Cell 1: Belongs to Band 1, sends SSB on demand, does not perform normal RACH monitoring, and does not send SIB1;

[0544] Cell 2: belongs to Band 1, sends SSB normally, does not monitor RACH normally, and does not send SIB1;

[0545] Cell 3: Belongs to Band 2, sends SSB on demand, does not perform normal RACH monitoring, and does not send SIB1.

[0546] In an example, the first information about the second carrier group sent by the network-side device through the first carrier may include: the SIB of each second carrier in the second carrier group.

[0547] The SIB of the second carrier included in the first information may include at least one of the following:

[0548] All or part of the SIBs of the second carrier, where the part of the SIBs may include at least one of: public land mobile network (PLMN) information, configuration information related to cell selection criteria, configuration information related to cell reselection criteria, and cell barring information;

[0549] The SIB1 status information of the second carrier includes at least one of: SIB1 is not sent and SIB1 is carried by system information of the first carrier.

[0550] In an example, the first information about the second carrier group sent by the network-side device through the first carrier may include, in addition to the system information of the second carrier, at least one of the following:

[0551] 1) WUS configuration information for triggering the at least one second carrier to send an SSB, or WUS configuration information for triggering adaptive adjustment of the SSB of the at least one second carrier;

[0552] 2) WUS configuration information for triggering RACH monitoring of the at least one second carrier, or WUS configuration information for triggering RACH monitoring adaptive adjustment of the at least one second carrier;

[0553] 3) WUS configuration information for triggering the at least one second carrier to send an SSB or perform SSB adaptive adjustment, and triggering the at least one second carrier to perform random access channel RACH monitoring or RACH monitoring adaptive adjustment;

[0554] 4) Configuration information related to the SSB currently being transmitted by the at least one second carrier may specifically include at least one of the following:

[0555] whether the at least one second carrier is transmitting SSB;

[0556] at least one of a frequency of the SSB being transmitted by the at least one second carrier, an SSB transmission period, and the number of SSBs in one transmission period;

[0557] The at least one second carrier is sending a transmission mode of the SSB, and the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, a compact transmission mode, a long-cycle transmission mode (the transmission cycle of the SSB is long) and an on-demand transmission mode, wherein the energy-saving transmission mode can be a simplified transmission mode that only sends a primary synchronization signal (PSS) and a secondary synchronization signal (SSS), and the compact transmission mode can be a transmission mode in which there is no time domain gap between multiple SSBs.

[0558] 5) Configuration information related to the RACH monitoring behavior currently in which the at least one second carrier is located may specifically include at least one of the following:

[0559] whether the at least one second carrier performs RACH monitoring;

[0560] at least one of a transmission period of the RACH being monitored by the at least one second carrier, the number of RACHs in one transmission period, RACH frequency domain resource configuration information, and RACH time domain resource configuration information;

[0561] The at least one second carrier monitors the RACH monitoring mode, and the monitoring mode includes one of a normal monitoring mode, a simplified monitoring mode (for example, a reduced RO transmission opportunity), an aggregated monitoring mode, and an on-demand monitoring mode, wherein the simplified monitoring mode may include a reduced RO transmission opportunity, and the aggregated monitoring mode may be a monitoring mode with no time domain gap between multiple ROs, and RO is the abbreviation of physical random access channel opportunity (PRACH Occasion).

[0562] 6) Configuration information related to RACH monitoring after successful WUS triggering, which may include:

[0563] After the WUS is triggered successfully, the at least one second carrier monitors at least one of the RACH period, the number of monitored RACHs, the frequency domain resource configuration information of the monitored RACH, the time domain resource configuration information of the monitored RACH, and the monitoring mode of the monitored RACH, wherein the monitoring mode includes a normal monitoring mode, a simplified monitoring mode (for example, reducing RO opportunities), an aggregated monitoring mode (no time domain interval between multiple ROs), and an on-demand monitoring mode.

[0564] 7) Configuration information related to RACH monitoring after successful WUS triggering, which may include:

[0565] After the WUS is triggered successfully, the at least one second carrier monitors at least one of the RACH period, the number of monitored RACHs, the frequency domain resource configuration information of the monitored RACH, the time domain resource configuration information of the monitored RACH, and the monitoring mode of the monitored RACH, wherein the monitoring mode includes a normal monitoring mode, a simplified monitoring mode (for example, reducing RO opportunities), an aggregated monitoring mode (no time domain interval between multiple ROs), and an on-demand monitoring mode.

[0566] 8) The characteristic information of the at least one second carrier itself may specifically include at least one of the following:

[0567] identification information of the at least one second carrier;

[0568] Whether the at least one second carrier is in a prohibited Bar state;

[0569] The priority of the at least one second carrier when the UE performs random access channel selection;

[0570] whether the at least one second carrier is set to a Bar state for a first type of UE, where the first type includes at least one of reduced capability (Redcap), non-terrestrial network (NTN), and support for a Network Energy Saving (NES) function;

[0571] The characteristic value N of the UE ID that allows random access to the at least one second carrier, for example, a UE with UE ID mod number of carriers=N can perform random access on the carrier;

[0572] whether the at least one second carrier supports UE camping;

[0573] Whether the at least one second carrier is a suitable cell;

[0574] Whether the at least one second carrier supports cell selection and / or cell reselection.

[0575] In some embodiments, the first information may be sent by the first carrier through a broadcast message; or, the first information is assumed to be the same as the corresponding information of the first carrier; or, when the first information is not configured, it is assumed to be the same as the corresponding information of the first carrier, for example, at least one of the PLMN information corresponding to the second carrier, the relevant configuration information of the cell selection criteria, the relevant configuration information of the cell reselection criteria, and the cell barring (Cell Bar) information is the same as that of the first carrier.

[0576] In some embodiments, when the UE performs cell selection, although there is a special carrier (a second carrier whose information has been obtained from the first carrier), the UE still gives priority to the first carrier.

[0577] In some embodiments, after the UE detects the first carrier and obtains the first information, if the first carrier is determined to be a suitable cell, the UE does not send a WUS and selects the first carrier for monitor paging; if the first carrier is determined not to be a suitable cell, the UE performs one of the following:

[0578] ■ Send a WUS to each second carrier in the second carrier group, and determine based on the triggered SSB measurement result and SIB1: The UE selects one or more carriers in the second carrier group according to the first rule to send the corresponding WUS and receive the SSB, and determines whether the one or more second carriers are suitable cells based on the SSB measurement result after successful triggering and the SIB1 information of the carrier obtained through the first carrier;

[0579] ◆If at least one second carrier is a suitable cell, the UE selects one of the second carriers for monitoring paging according to the first rule.

[0580] ■Send a WUS to each second carrier in the second carrier group, and judge based on the triggered SSB measurement results and part of the SIB information: The UE selects one or more carriers in the second carrier group according to the first rule to send the corresponding WUS and receive the SSB, and judges whether the one or more second carriers are suitable cells based on the information corresponding to the carrier (such as configuration information related to cell selection or cell reselection) and the SSB measurement results.

[0581] ◆If at least one second carrier is a suitable cell, the UE selects one of the second carriers for monitoring paging according to the first rule.

[0582] ■The UE ignores the second carrier group and seeks other suitable cells.

[0583] Optionally, in some embodiments, the UE performs one of the following to determine a target carrier for performing the first operation:

[0584] ■The UE selects one or more carriers in the first carrier group and the second carrier group according to the first rule: for the first carrier, the UE determines whether it is a suitable cell based on the SSB measurement result and the SIB1 configuration; for the carriers in the second carrier group, the UE sends the corresponding WUS to receive the SSB, and determines whether the one or more carriers are suitable cells based on the SSB measurement result and the SIB1 obtained through the first carrier;

[0585] ◆If at least one carrier is a suitable cell, the UE selects one of the carriers for monitor paging according to the first rule.

[0586] ■The UE selects the first carrier and one or more carriers in the second carrier group as target cells according to the first rule: for the first carrier, it determines whether it is a suitable cell based on the SSB measurement result and SIB1 configuration; for the carriers in the second carrier group, it sends the corresponding WUS to receive SSB, and determines whether the one or more carriers are suitable cells based on the SSB measurement result and the information corresponding to the carrier (such as configuration information related to cell selection or cell reselection).

[0587] ◆If at least one carrier is a suitable cell, the UE selects one of the carriers for monitor paging according to the first rule.

[0588] In some embodiments, for a UE residing on a first carrier, intra-frequency and inter-frequency measurements are performed according to the configuration information of the first carrier. If a second carrier in the second carrier group is determined to be the highest ranked cell or the target cell for cell reselection, the UE sends a WUS to the carrier to trigger the sending of an SSB. After obtaining the SSB measurement result, the UE determines whether the cell is a suitable cell based on the SSB measurement result and the system information of the carrier obtained from the first carrier. If it is a suitable cell, the UE performs cell reselection and resides in the cell.

[0589] In some embodiments, for a UE residing on a first carrier, if there is a need for random access, the UE directly initiates a RACH on the first carrier for random access by default.

[0590] In some embodiments, for a UE residing on a first carrier, if there is a need for random access, the UE selects a target carrier for random access from the first carrier and the second carrier group according to a first rule:

[0591] 1) If the selected target carrier is the first carrier, RACH is directly initiated for random access;

[0592] 2) If the selected target carrier is a carrier of the second carrier group, and the target carrier does not send SSB and has no reference carrier, the UE sends a WUS to trigger SSB transmission and RACH monitoring on the target carrier. The UE then initiates RACH random access on the carrier based on the SIB1 configuration of the target carrier obtained on the first carrier. Optionally, a WUS is sent once to trigger SSB transmission and RACH monitoring. Alternatively, the first WUS is sent to trigger SSB transmission, and then a second WUS is sent to trigger RACH monitoring.

[0593] In some embodiments, the first rule includes: the UE screening out a target carrier that meets a condition, where the condition includes at least one of the following:

[0594] The target carrier is not in the bar state for the UE;

[0595] The RSRP / RSRQ measured on the target carrier meets certain conditions, such as being greater than or equal to a threshold;

[0596] The target carrier is a suitable cell for the UE.

[0597] In some embodiments, the UE selects a target carrier from all carriers (the first carrier and / or the second carrier group) or all filtered carriers, including at least one of the following:

[0598] Randomly select the target carrier;

[0599] A weight value p is randomly generated, and each carrier is sequentially configured with a corresponding weight value p(1), p(2), ..., and when p is in the range between p(0)+p(1)+...+p(i-1) and p(0)+p(1)+...+p(i), carrier i is selected as the target carrier;

[0600] The network side indicates / configures the target carrier for the UE to perform random access;

[0601] Selecting the carrier with the largest or smallest carrier index as the target carrier;

[0602] Select the carrier with the largest, smallest or middle center frequency as the target carrier;

[0603] Select the carrier with the largest or smallest SCS as the target carrier;

[0604] Selecting a second carrier with the smallest frequency interval from the first carrier as the target carrier;

[0605] Select the carrier that needs to send the least number of WUS as the target carrier;

[0606] Select the carrier with the highest priority as the target carrier;

[0607] The carrier with the largest RSRP / SINR measurement value of the reference signal is selected as the target carrier.

[0608] It should be noted that the on-demand SSB involved in this embodiment means that the carrier supports the on-demand SSB transmission mode, that is, it supports the UE to use WUS to trigger the transmission of normal SSB. The same applies to on-demand SIB1 and on-demand RACH monitoring.

[0609] Example 2 (When there are multiple carriers with different transmission modes or the same transmission mode, the UE selects the carrier with the highest priority for RACH)

[0610] The terminal obtains the system information of Cell1, Cell2, Cell3, Cell4 and Cell5 on the first carrier Cell0 (anchor carrier), and obtains the remaining first information about the second carriers Cell1, Cell2, Cell3, Cell4 and Cell5 on Cell0.

[0611] Cell 0: Belongs to band 0 (anchor carrier), sends SSBs normally, and carries system information of other carriers in the SIBs;

[0612] Cell 1: Belongs to Band 1, does not send SSB (using the SSB of the first carrier as a reference), performs normal RACH monitoring, and does not send SIB1;

[0613] Cell 2: Belongs to Band 2, sends SSB on demand, performs normal RACH monitoring, and does not send SIB1;

[0614] Cell 3: belongs to Band 3, sends SSB normally, does not monitor RACH normally, and does not send SIB1;

[0615] Cell 4: Belongs to Band 4, does not send SSB (using the SSB of the first carrier as a reference), does not perform normal RACH monitoring, and does not send SIB1;

[0616] Cell 5: Belongs to Band 5, sends SSB on demand, does not perform normal RACH monitoring, and does not send SIB1.

[0617] If the first priority is specified as: carrier priority for sending SSB > carrier priority for sending SSB on demand > carrier priority for not sending SSB; and the second priority is specified as: carrier priority for performing normal RACH monitoring > carrier priority for not performing normal RACH monitoring, and the first priority is given priority, then: among Cell1, Cell2, Cell3, Cell4 and Cell5, since Cell3 has the highest priority, the terminal considers performing RACH in Cell3.

[0618] Example 3 (When there are multiple carriers with different transmission modes or the same transmission mode, the UE selects the carrier with the least number of WUS transmissions for RACH)

[0619] The terminal obtains the system information of Cell1, Cell2, Cell3, Cell4 and Cell5 on the first carrier Cell0 (anchor carrier), and obtains the first configuration of the second carriers Cell1, Cell2, Cell3, Cell4 and Cell5 on Cell0.

[0620] Cell 0: Belongs to band 0, sends SSBs normally, and carries system information of other carriers in the SIBs;

[0621] Cell 1: Belongs to Band 1, does not send SSB normally (using the SSB of the first carrier as a reference), performs normal RACH monitoring, and does not send SIB1;

[0622] Cell 2: Belongs to Band 2, sends SSB on demand, performs normal RACH monitoring, and does not send SIB1;

[0623] Cell 3: Belongs to Band 3, sends SSB, does not perform normal RACH monitoring, and does not send SIB1;

[0624] Cell 4: Belongs to Band 4, does not send SSB (using the SSB of the first carrier as a reference), does not perform normal RACH monitoring, and does not send SIB1;

[0625] Cell 5: Belongs to Band 5, sends SSB on demand, does not perform normal RACH monitoring, and does not send SIB1.

[0626] The UE selects a carrier on the second carrier group to perform RACH according to the principle of sending the least number of WUSs required. In this embodiment, sending a WUS is either used to trigger SSB transmission or to trigger RACH monitoring.

[0627] Then, because:

[0628] Cell1 does not need to send a WUS. The UE can directly use the SSB of the first carrier as a reference to perform random access in Cell1 based on the system information obtained in Cell0.

[0629] Cell2 needs to send a WUS to trigger Cell2's SSB transmission / SSB adaptation adjustment;

[0630] Cell3 needs to send a WUS to trigger Cell3's RACH monitoring;

[0631] Cell4 needs to send a WUS to trigger Cell4's RACH monitoring;

[0632] Cell5 needs to send two WUSs, one to trigger SSB transmission and one to trigger ARCH monitoring;

[0633] Therefore, among Cell 1, Cell 2, Cell 3, Cell 4, and Cell 5, Cell 1 requires the least number of WUS transmissions. Therefore, the terminal considers performing RACH on Cell 1. If multiple cells have the same configuration as Cell 1, the UE selects any one of them for RACH.

[0634] Example 4 (When there are multiple carriers with different transmission modes or the same transmission mode, the UE selects the carrier with the highest priority for RACH)

[0635] The terminal obtains the system information of Cell1, Cell2, Cell3, Cell4 and Cell5 on the first carrier Cell0 (anchor carrier), and obtains the first configuration of the second carriers Cell1, Cell2, Cell3, Cell4 and Cell5 on Cell0.

[0636] Cell 0: Belongs to band 0, sends SSBs normally, and carries system information of other carriers in the SIBs;

[0637] Cell 1: Belongs to Band 1, does not send SSB (using the SSB of the first carrier as a reference), performs normal RACH monitoring, does not send SIB1, and its frequency interval with Cell 0 is within interval 1;

[0638] Cell 2: Belongs to Band 2, sends SSB on demand, performs normal RACH monitoring, does not send SIB1, and its frequency interval with Cell 0 is within interval 1;

[0639] Cell 3: Belongs to Band 3, sends SSB normally, does not perform normal RACH monitoring, does not send SIB1, and the frequency interval with Cell 0 is within interval 1;

[0640] Cell 4: Belongs to Band 4, does not send SSB (using the SSB of the first carrier as a reference), does not perform normal RACH monitoring, does not send SIB1, and its frequency interval with Cell 0 is within interval 2;

[0641] Cell 5: Belongs to Band 5, sends SSB on demand, does not perform normal RACH monitoring, does not send SIB1, and its frequency interval with Cell 0 is within interval 2.

[0642] The protocol stipulates the carrier priority formula: y = A + B + C. The smaller the priority value, the higher the priority.

[0643] ●A is related to the SSB transmission mode of the carrier

[0644] ■A=0, the carrier is in normal SSB mode;

[0645] ■A=1, the carrier is in non-SSB transmission mode (with the first carrier as the reference);

[0646] ■A=2, the carrier is in on-demand SSB transmission mode / simplified SSB transmission mode / long-cycle SSB transmission mode (normal SSB transmission can be triggered by WUS).

[0647] ●B is related to the RACH monitoring mode of the carrier

[0648] ■B=0, the carrier is in normal RACH monitoring mode;

[0649] ■B=1: The carrier is in on-demand RACH monitoring mode.

[0650] ●C is related to the frequency separation between this carrier and the first carrier

[0651] ■C=0, the frequency interval is within interval 1;

[0652] ■C=1, the frequency interval is within interval 2.

[0653] According to the above formula, we can know that:

[0654] Cell 1's priority = 1 + 0 + 0 = 1

[0655] Cell2's priority = 2 + 0 + 0 = 2

[0656] Cell 3's priority = 0 + 1 + 0 = 1

[0657] Cell 4's priority = 1 + 1 + 1 = 3

[0658] The priority of Cell 5 = 2 + 1 + 1 = 4.

[0659] Since the smaller the priority value, the higher the priority, the UE will choose to perform RACH in Cell1 and Cell3 at will.

[0660] In addition, the priority of the second carrier or carrier group may also be directly configured by the network side in the first information, and the UE may select a carrier for random access according to the configured priority value.

[0661] Example 5 (Correspondence between WUS Resources and Second Carrier or Second Carrier Group)

[0662] 1) As shown in FIG6 , the WUS resources configured for the second carrier group via the first carrier (anchor carrier) correspond one-to-one to the carriers (non-anchor carriers) in the second carrier group.

[0663] 2) As shown in FIG7 , each second carrier has its corresponding WUS resource location.

[0664] 3) As shown in Figure 8, the WUS resources configured for the second carrier group through the first carrier (anchor carrier) overlap with the public RACH resources. Only when the UE sends a specific preamble code sequence on a specific resource can it be regarded as triggering the SSB transmission of the corresponding second carrier (non-anchor carrier).

[0665] The above describes a random access method proposed in an embodiment of the present application. Corresponding to the above random access method, an embodiment of the present application also proposes a communication method, which will be described below.

[0666] As shown in FIG9 , a communication method proposed in an embodiment of the present application may include:

[0667] In step 901, the network side device sends first information about the second access object group to the terminal through the first access object, wherein the second access object group includes one or more second access objects different from the first access object, and the first information includes system information SIB of the second access object. The first information is used by the terminal to select a target access object to perform a first operation, wherein the first operation includes residence or random access, and the access object includes one of a carrier, a cell, and a bandwidth part BWP.

[0668] The access object may include one of a carrier, a cell, and a bandwidth part (BWP). A random access method proposed in an embodiment of the present application is for a scenario with multiple access objects, and is mainly described below by taking a multi-carrier scenario as an example.

[0669] In one embodiment, in a multi-carrier scenario, the first access target may be an anchor carrier, and the second access target may be a non-anchor carrier. On the anchor carrier, the UE can obtain system information of the anchor carrier and necessary system information of other non-anchor carriers. The UE can also perform at least one of random access (RACH), data transmission, and data reception on either the anchor carrier or the non-anchor carrier.

[0670] In another embodiment, in a multi-carrier scenario, the first access object may be a carrier that normally sends SSBs, and the second access object may be a carrier that abnormally sends SSBs (SSB-less carrier).

[0671] The first information may be sent by the first access object through a broadcast message; or, it is assumed that the first information is the same as the corresponding information of the first access object.

[0672] The system information of the second access object included in the first information includes at least one of the following:

[0673] All or part of the SIBs of the second access object, where the part of the SIBs may include at least one of: public land mobile network (PLMN) information, configuration information related to cell selection criteria, configuration information related to cell reselection criteria, and cell barring information;

[0674] The SIB1 status information of the second access object includes at least one of: SIB1 is not sent and SIB1 is carried by the system information of the first access object.

[0675] The first information corresponds to at least one second access object in the second access object group, and the first information further includes at least one of the following:

[0676] 1) WUS configuration information for triggering the at least one second access object to send an SSB, or WUS configuration information for triggering adaptive adjustment of the SSB of the at least one second access object, wherein the SSB includes at least one of a synchronization signal block and a physical broadcast channel block;

[0677] 2) WUS configuration information for triggering RACH monitoring of the at least one second access object, or WUS configuration information for triggering RACH monitoring adaptation (RACH adaptation) of the at least one second access object;

[0678] 3) The configuration information related to the SSB currently being sent by the at least one second access object may specifically include at least one of the following:

[0679] whether the at least one second access object is sending an SSB;

[0680] At least one of the frequency of the SSB being sent by the at least one second access object, the SSB sending period, and the number of SSBs in a sending period;

[0681] The at least one second access object is sending an SSB transmission mode, and the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, a compact transmission mode, a long-cycle transmission mode (the transmission cycle of SSB is long) and an on-demand transmission mode, wherein the energy-saving transmission mode can be a simplified transmission mode that only sends a primary synchronization signal (PSS) and a secondary synchronization signal (SSS), and the compact transmission mode can be a mode in which there is no time domain gap between multiple SSBs.

[0682] 4) Configuration information related to the RACH monitoring behavior currently in which the at least one second access object is located may specifically include at least one of the following:

[0683] whether the at least one second access object performs RACH monitoring;

[0684] At least one of a transmission period of the RACH being monitored by the at least one second access object, the number of RACHs in a transmission period, RACH frequency domain resource configuration information, and RACH time domain resource configuration information;

[0685] The at least one second access object monitors the RACH in a monitoring mode, where the monitoring mode includes one of a normal monitoring mode, a simplified monitoring mode (e.g., a reduced RO opportunity), an aggregated monitoring mode, and an on-demand monitoring mode, wherein the simplified monitoring mode may include a reduced RO opportunity, the aggregated monitoring mode may be a monitoring mode with no time domain gap between multiple ROs, and RO is the abbreviation of physical random access channel opportunity (PRACH Occasion).

[0686] 5) SSB configuration information sent after successful WUS triggering, which may include at least one of the following:

[0687] After the WUS is successfully triggered, at least one of the frequency of sending SSB, the period of sending SSB, and the number of SSBs in one sending period of the at least one second access object;

[0688] After the WUS is successfully triggered, the at least one second access object sends a listening window for the SSB, that is, the UE listens to the SSB within the listening window;

[0689] After the WUS is successfully triggered, the at least one time domain resource index or the position of at least one time domain resource of the at least one second access object actually sending the SSB;

[0690] After the WUS is successfully triggered, at least one of the transmission time length, the number of SSB transmission times, and the number of SSB transmission cycles of the at least one second access object;

[0691] After the WUS is successfully triggered, the relative relationship between the SSB sent by the at least one second access object and the SSB sent by the first access object in at least one of the time domain, frequency domain, and spatial domain;

[0692] After the WUS is successfully triggered, the time domain resource position of the first SSB sent by the at least one second access object is, for example, sent in the most recent SSB period of X time slots / symbols after the trigger signal (WUS) is sent;

[0693] After the WUS is triggered successfully, the at least one second access object sends the SSB transmission mode, and the transmission mode includes one of the normal transmission mode, the energy-saving transmission mode (for example, only sending PSS and SSS), the aggregated transmission mode (for example, there is no time domain interval between multiple SSBs), the long-cycle transmission mode (SSB cycle is longer) and the on-demand transmission mode.

[0694] 6) Configuration information related to RACH monitoring after successful WUS triggering, which may include:

[0695] After the WUS is triggered successfully, the at least one second access object monitors at least one of the RACH monitoring period, the number of RACHs monitored, the frequency domain resource configuration information of the RACH monitored, the time domain resource configuration information of the RACH monitored, and the monitoring mode of the RACH monitored, wherein the monitoring mode includes a normal monitoring mode, a simplified monitoring mode (for example, reducing RO opportunities), an aggregated monitoring mode (no time domain interval between multiple ROs), and an on-demand monitoring mode.

[0696] 7) The characteristic information of the at least one second access object may include at least one of the following:

[0697] identification information of the at least one second access object;

[0698] whether the at least one second access object can use the first access object as a reference access object;

[0699] whether the at least one second access object is co-located with the first access object;

[0700] whether the at least one second access object and the first access object are in the same timing advance group (TAG);

[0701] whether the at least one second access object has a Quasi Co-Location (QCL) relationship with the first access object;

[0702] a reference access object of the at least one second access object;

[0703] an access object co-located with the at least one second access object;

[0704] an access object that is located in the same TAG as the at least one second access object;

[0705] an access object having a QCL relationship with the at least one second access object;

[0706] Whether the at least one second access object is in a prohibited Bar state;

[0707] The priority of the at least one second access object when the UE performs random access channel selection;

[0708] whether the at least one second access object is set to a Bar state for a first type of UE, wherein the first type includes at least one of reduced capability (Redcap), non-terrestrial network (NTN), and support for a network energy saving (NES) function;

[0709] The characteristic value N of the UE ID of the at least one second access object allowing random access, for example, a UE with UE ID mod number of carriers=N can perform random access on the carrier;

[0710] whether the at least one second access object supports UE residency;

[0711] Whether the at least one second access object is a suitable cell;

[0712] Whether the at least one second access object supports cell selection and / or cell reselection.

[0713] The WUS configuration information included in the first information may include at least one of the following:

[0714] 1) WUS synchronization reference configuration information, which may include at least one of the following:

[0715] At least one of an SSB, a channel state information reference signal (CSI-RS), and a tracking reference signal (TRS) of the first access object;

[0716] GPS timing.

[0717] 2) WUS resource configuration information, which may include at least one of the following:

[0718] Time domain resource information;

[0719] Frequency domain resource information;

[0720] The signal sequence configuration information, for example, a preamble group, may specifically indicate a preamble group index, indicating that the preamble group is used to trigger the SSB of the at least one second access object.

[0721] 3) WUS power configuration information, which may include at least one of the following:

[0722] Initial signal power;

[0723] Signal power ramp-up step size.

[0724] 4) WUS retransmission configuration information may include at least one of the following:

[0725] The number of repetitions of a single signal transmission;

[0726] The maximum number of repetitions sent by the channel.

[0727] 5) WUS airspace parameter configuration information, which may include at least one of the following:

[0728] A correspondence between the WUS and the SSB of the first access object;

[0729] a correspondence between the WUS and the SSB of the at least one second access object;

[0730] The correspondence between WUS and the SSB of the second access object group.

[0731] 6) WUS sending timer configuration information. The timer is used to prevent WUS from being sent too frequently. Generally, the timer is started after the WUS is sent. Repeated WUS sending is not allowed before the timer expires.

[0732] The form of the WUS signal includes at least one of the following:

[0733] RACH;

[0734] Msg1;

[0735] Preamble sequence;

[0736] Sounding Reference Signal (SRS);

[0737] Physical Uplink Control Channel (PUCCH).

[0738] The configuration method of the WUS resource configuration information includes at least one of the following:

[0739] Configuring a signal resource list in the first information, where each element of the signal resource list corresponds one-to-one to the second access object or the second access object group index size, and an element in the signal resource list includes one or more resources;

[0740] Configuring a signal resource list in the first information, where each element of the signal resource list explicitly corresponds to the second access object or the second access object group index;

[0741] Configuring a candidate resource set in the first information, where one or more resources in the candidate resource set correspond to a resource number, one resource number corresponds to an index of a second access object or a second access object group, and the resource number is determined according to at least one of a time domain, a frequency domain, and a spatial domain;

[0742] One or more signal resources are configured for the second access object or the second access object group in the first information.

[0743] The signal resources configured by the WUS resource configuration information include at least one of the following:

[0744] The time-frequency resources are the same as the time-frequency resources of the common RACH on the first access object or the second access object group, that is, the common RACH on the first access object shares the same video resources;

[0745] The time-frequency resources are time-frequency resources of a dedicated RACH on the first access object or the second access object group, which is specifically used to trigger SSB transmission and / or RACH monitoring, wherein the time-frequency resources of the dedicated RACH and the dedicated RACH configuration may be completely different from the time-frequency resources used by the common RACH on the first access object, or may be part of the time-frequency resources of the common RACH on the first access object;

[0746] The time-frequency resources are the time-frequency resources of the dedicated SRS / PUCCH on the first access object or the second access object group used to trigger SSB transmission and / or RACH monitoring.

[0747] The grouping method of the second access object group includes at least one of the following:

[0748] Configured by network-side devices;

[0749] As stipulated by the agreement.

[0750] The grouping rule of the second access object group includes at least one of the following:

[0751] The second access objects in the same frequency band are grouped together;

[0752] The second access objects in the same frequency band interval are grouped together;

[0753] The second access objects having at least one of the same initial BWP, active BWP, SSB, and SCS are grouped together;

[0754] The second access objects with the same transmission mode are grouped together, wherein the transmission mode is related to at least one of the following: whether to send SSB, whether to perform RACH monitoring, and whether to support on-demand SSB transmission;

[0755] The second access object of the co-location is a group;

[0756] The second access objects with the same SSB sending period are grouped together.

[0757] Regarding how the terminal device selects the target access object for performing the first operation from the first access object and the second access object group based on the first information, please refer to the above introduction to the embodiment shown in Figure 2, which will not be repeated here.

[0758] The embodiment shown in Figure 9 provides a communication method. Since the network side device can provide the terminal with first information about the second access object group through the first access object, the first information includes the system information SIB of the second access object, so that the terminal can select the target access object to be resided or randomly accessed from the first access object and the second access object group according to the first information. The second access object does not need to continuously send information such as SSB and SIB, but sends SSB on demand or performs RACH monitoring on demand. Therefore, while saving energy on the network side, the capacity of the network side can be guaranteed as much as possible.

[0759] Optionally, the target access object belongs to the second access object group, and the first information includes WUS configuration information for triggering the at least one second access object to send an SSB, or triggering the WUS configuration information for SSB adaptive adjustment of the at least one second access object, and the first information includes triggering the WUS configuration information for random access channel RACH monitoring of the at least one second access object, or triggering the WUS configuration information for RACH monitoring adaptive adjustment of the at least one second access object. A communication method provided in an embodiment of the present application may further include:

[0760] The target access object receives a wake-up signal WUS, where the WUS is used to trigger the target access object to send at least one of an SSB and monitor a RACH.

[0761] In an example, the WUS is sent by the terminal when a first condition is met, where the first condition may include at least one of the following:

[0762] 1) The first access object is not a suitable cell;

[0763] 2) The target access object is a suitable cell;

[0764] 3) performing intra-frequency or inter-frequency measurement on the target access object;

[0765] 4) The target access object is in a first energy-saving state, wherein the first energy-saving state includes at least one of not sending SSB, not sending SIB, not monitoring RACH, sending energy-saving SSB (such as Sparse SSB), sending energy-saving SIB (such as Sparse SIB), and energy-saving monitoring RACH (such as Sparse RACH monitoring), and the energy-saving SSB includes one of lightweight SSB, simplified SSB, sparse SSB and long-period SSB;

[0766] 5) The terminal is sensitive to access delay;

[0767] 6) The terminal is in the process of recovering from link failure.

[0768] In another example, the wake-up signal WUS for the target access object is sent by the terminal under the assumption that the target access object is in the second energy-saving state.

[0769] The second energy-saving state may include at least one of the following:

[0770] Do not send SIB, send SSB normally, and perform normal RACH monitoring;

[0771] Not sending an SIB, not sending an SSB, or sending an energy-saving SSB (such as a simplified SSB or a sparse SSB), taking the first access object as a reference, and performing normal RACH monitoring;

[0772] Do not send SIB, send SSB normally, and do not perform normal RACH monitoring;

[0773] No SIB is sent, no SSB is sent, or energy-saving SSB (such as simplified SSB or sparse SSB, etc.) is sent, and normal RACH monitoring is not performed.

[0774] In a first example, the target access object receives a wake-up signal WUS, which may include: the target access object receives a WUS for the target access object, and the WUS can be used to achieve two purposes: one is to trigger the target access object to send SSB, and the other is to trigger the target access object to monitor RACH.

[0775] In a second example, the target access object receives a wake-up signal WUS, which may include: the target access object receives a first WUS, and the first WUS is used to trigger the target access object to send SSB; the target access object receives a second WUS, wherein the second WUS is used to trigger the target access object to monitor RACH.

[0776] Exemplarily, the target access object receiving the second WUS (a time point of receiving the second WUS) includes the following:

[0777] The target access object receives a second WUS that the terminal starts sending Z time slots / symbols / milliseconds after sending the first WUS;

[0778] The target access object receives a second WUS that the terminal starts sending X time slots / symbols / milliseconds after receiving feedback on the first WUS;

[0779] The target access object receives a second WUS that is sent Y time slots / symbols / milliseconds after the terminal receives the first SSB sent after successfully triggering the target access object;

[0780] The target access object receives a second WUS sent by the terminal when the number of times the first WUS is sent reaches a maximum value;

[0781] The target access object receives a second WUS sent by the terminal after a first timer times out, wherein the first timer is started after the first WUS is sent.

[0782] This embodiment provides a communication method that can trigger the second access object to send SSB or perform RACH monitoring on demand (on-demand), rather than continuously sending SSB or continuously performing RACH monitoring, or not sending SSB or not performing RACH monitoring. Therefore, it can save energy for the network side equipment while ensuring the capacity of the network side to the greatest extent possible.

[0783] Optionally, when the WUS is used to trigger the sending of an SSB, a communication method provided by an embodiment of the present application may further include: the target access object sending an SSB. This allows the target access object to send an SSB on demand (on-demand) under the triggering of the WUS, thereby preparing for access to the target access object and increasing the capacity of the network side.

[0784] Optionally, a communication method provided in an embodiment of the present application may further include:

[0785] The target access object monitors the first operation initiated by the terminal, for example, monitors the RACH initiated by the terminal to the target access object.

[0786] Optionally, a communication method provided in an embodiment of the present application may further include:

[0787] The target access object receives the WUS sent again by the terminal when the second condition is met, so as to improve the success rate of executing the first operation.

[0788] The second condition may include but is not limited to at least one of the following:

[0789] 1)SSB detection failed;

[0790] 2) The number of random accesses reaches the maximum value;

[0791] The number of WUS transmissions is less than or equal to the preset maximum number of transmissions;

[0792] 3) No feedback was received for the previous WUS;

[0793] 4) The previous WUS is used to trigger the sending of SSB. After receiving the feedback for the previous WUS signal, another WUS is sent to trigger RACH monitoring (that is, the WUS is sent again to trigger RACH monitoring);

[0794] 5) No feedback for the previous WUS is received before the timer expires.

[0795] Optionally, the resent WUS signal has at least one of the following characteristics:

[0796] 1) Signal power increases;

[0797] 2) The time interval between the sending of the last WUS is greater than the preset time interval;

[0798] 3) Frequency domain resources and sequence resources are the same as those of the previous WUS.

[0799] The above describes a communication method for a network and a device provided in an embodiment of the present application.

[0800] It should be noted that the random access method or communication method provided in the embodiments of the present application may be performed by a communication device. In the embodiments of the present application, the communication device provided in the embodiments of the present application is described by taking the communication device performing the random access method as an example.

[0801] The following describes a communication device provided in an embodiment of the present application in conjunction with the accompanying drawings. Since the communication device provided in an embodiment of the present application corresponds to a random access method provided in an embodiment of the present application, the description of the communication device provided in an embodiment of the present application is relatively brief. For details, please refer to the introduction of the method embodiment above.

[0802] As shown in FIG10 , an embodiment of the present application provides a random access apparatus 1000 , which may include: an information receiving module 1001 and an access object selection module 1002 .

[0803] The information receiving module 1001 is used to receive first information about a second access object group sent by a network-side device through a first access object, wherein the second access object group includes one or more second access objects different from the first access object, and the first information includes system information SIB of the second access object, and the access object includes one of a carrier, a cell, and a bandwidth part BWP.

[0804] The access object may include one of a carrier, a cell, and a bandwidth part (BWP). A random access method proposed in an embodiment of the present application is for a scenario with multiple access objects, and is mainly described below by taking a multi-carrier scenario as an example.

[0805] In one embodiment, in a multi-carrier scenario, the first access target may be an anchor carrier, and the second access target may be a non-anchor carrier. On the anchor carrier, the UE can obtain system information of the anchor carrier and necessary system information of other non-anchor carriers. The UE can also perform at least one of random access (RACH), data transmission, and data reception on any anchor carrier or non-anchor carrier.

[0806] In another embodiment, in a multi-carrier scenario, the first access object may be a carrier that normally sends SSBs, and the second access object may be a carrier that abnormally sends SSBs (SSB-less carrier).

[0807] The first information may be sent by the first access object through a broadcast message; or, it is assumed that the first information is the same as the corresponding information of the first access object.

[0808] The system information of the second access object included in the first information includes at least one of the following:

[0809] All or part of the SIBs of the second access object, where the part of the SIBs may include at least one of: public land mobile network (PLMN) information, configuration information related to cell selection criteria, configuration information related to cell reselection criteria, and cell barring information;

[0810] The SIB1 status information of the second access object includes at least one of: SIB1 is not sent and SIB1 is carried by the system information of the first access object.

[0811] The first information corresponds to at least one second access object in the second access object group, and the first information further includes at least one of the following:

[0812] 1) triggering the at least one second access object to send an SSB wake-up signal (WUS) configuration information, or triggering the at least one second access object to perform SSB adaptation (SSB adaptation) WUS configuration information;

[0813] 2) WUS configuration information for triggering RACH monitoring of the at least one second access object, or WUS configuration information for triggering RACH monitoring adaptation (RACH adaptation) of the at least one second access object;

[0814] 3) The configuration information related to the SSB currently being sent by the at least one second access object may specifically include at least one of the following:

[0815] whether the at least one second access object is sending an SSB;

[0816] At least one of the frequency of the SSB being sent by the at least one second access object, the SSB sending period, and the number of SSBs in a sending period;

[0817] The at least one second access object is sending a transmission mode of the SSB, and the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, a compact transmission mode, a long-cycle transmission mode (the transmission cycle of the SSB is long) and an on-demand transmission mode, wherein the energy-saving transmission mode can be a simplified transmission mode that only sends a primary synchronization signal (PSS) and a secondary synchronization signal (SSS), and the compact transmission mode can be a transmission mode in which there is no time domain gap between multiple SSBs.

[0818] 4) Configuration information related to the RACH monitoring behavior currently in which the at least one second access object is located may specifically include at least one of the following:

[0819] whether the at least one second access object performs RACH monitoring;

[0820] At least one of a transmission period of the RACH being monitored by the at least one second access object, the number of RACHs in a transmission period, RACH frequency domain resource configuration information, and RACH time domain resource configuration information;

[0821] The at least one second access object monitors the RACH in a monitoring mode, where the monitoring mode includes one of a normal monitoring mode, a simplified monitoring mode (e.g., a reduced RO opportunity), an aggregated monitoring mode, and an on-demand monitoring mode, wherein the simplified monitoring mode may include a reduced RO opportunity, the aggregated monitoring mode may be a monitoring mode with no time domain gap between multiple ROs, and RO is the abbreviation of physical random access channel opportunity (PRACH Occasion).

[0822] 5) SSB configuration information sent after successful WUS triggering, which may include at least one of the following:

[0823] After the WUS is successfully triggered, at least one of the frequency of sending SSB, the period of sending SSB, and the number of SSBs in one sending period of the at least one second access object;

[0824] After the WUS is successfully triggered, the at least one second access object sends a listening window for the SSB, that is, the UE listens to the SSB within the listening window;

[0825] After the WUS is successfully triggered, the at least one time domain resource index or the position of at least one time domain resource of the at least one second access object actually sending the SSB;

[0826] After the WUS is successfully triggered, at least one of the transmission time length, the number of SSB transmission times, and the number of SSB transmission cycles of the at least one second access object;

[0827] After the WUS is successfully triggered, the relative relationship between the SSB sent by the at least one second access object and the SSB sent by the first access object in at least one of the time domain, frequency domain, and spatial domain;

[0828] After the WUS is successfully triggered, the time domain resource position of the first SSB sent by the at least one second access object is, for example, sent in the most recent SSB period of X time slots / symbols after the trigger signal (WUS) is sent;

[0829] After the WUS is triggered successfully, the at least one second access object sends the SSB transmission mode, and the transmission mode includes one of the normal transmission mode, the energy-saving transmission mode (for example, only sending PSS and SSS), the aggregated transmission mode (for example, there is no time domain interval between multiple SSBs), the long-cycle transmission mode (SSB cycle is longer) and the on-demand transmission mode.

[0830] 6) Configuration information related to RACH monitoring after successful WUS triggering, which may include:

[0831] After the WUS is triggered successfully, the at least one second access object monitors at least one of the RACH monitoring period, the number of RACHs monitored, the frequency domain resource configuration information of the RACH monitored, the time domain resource configuration information of the RACH monitored, and the monitoring mode of the RACH monitored, wherein the monitoring mode includes a normal monitoring mode, a simplified monitoring mode (for example, reducing RO opportunities), an aggregated monitoring mode (no time domain interval between multiple ROs), and an on-demand monitoring mode.

[0832] 7) The characteristic information of the at least one second access object may include at least one of the following:

[0833] identification information of the at least one second access object;

[0834] whether the at least one second access object can use the first access object as a reference access object;

[0835] whether the at least one second access object is co-located with the first access object;

[0836] whether the at least one second access object and the first access object are in the same timing advance group (TAG);

[0837] whether the at least one second access object has a Quasi Co-Location (QCL) relationship with the first access object;

[0838] a reference access object of the at least one second access object;

[0839] an access object co-located with the at least one second access object;

[0840] an access object that is located in the same TAG as the at least one second access object;

[0841] an access object having a QCL relationship with the at least one second access object;

[0842] Whether the at least one second access object is in a prohibited Bar state;

[0843] The priority of the at least one second access object when the UE performs random access channel selection;

[0844] whether the at least one second access object is set to a Bar state for a first type of UE, wherein the first type includes at least one of reduced capability (Redcap), non-terrestrial network (NTN), and support for a network energy saving (NES) function;

[0845] The characteristic value N of the UE ID of the at least one second access object allowing random access, for example, a UE with UE ID mod number of carriers=N can perform random access on the carrier;

[0846] whether the at least one second access object supports UE residency;

[0847] Whether the at least one second access object is a suitable cell;

[0848] Whether the at least one second access object supports cell selection and / or cell reselection.

[0849] The WUS configuration information included in the first information may include at least one of the following:

[0850] 1) WUS synchronization reference configuration information, which may include at least one of the following:

[0851] At least one of an SSB, a channel state information reference signal (CSI-RS), and a tracking reference signal (TRS) of the first access object;

[0852] GPS timing.

[0853] 2) WUS resource configuration information, which may include at least one of the following:

[0854] Time domain resource information;

[0855] Frequency domain resource information;

[0856] The signal sequence configuration information, for example, a preamble group, may specifically indicate a preamble group index, indicating that the preamble group is used to trigger the SSB of the at least one second access object.

[0857] 3) WUS power configuration information, which may include at least one of the following:

[0858] Initial signal power;

[0859] Signal power ramp-up step size.

[0860] 4) WUS retransmission configuration information may include at least one of the following:

[0861] The number of repetitions of a single signal transmission;

[0862] The maximum number of repetitions sent by the channel.

[0863] 5) WUS airspace parameter configuration information, which may include at least one of the following:

[0864] A correspondence between the WUS and the SSB of the first access object;

[0865] a correspondence between the WUS and the SSB of the at least one second access object;

[0866] The correspondence between WUS and the SSB of the second access object group.

[0867] 6) WUS sending timer configuration information. The timer is used to prevent WUS from being sent too frequently. Generally, the timer is started after the WUS is sent. Repeated WUS sending is not allowed before the timer expires.

[0868] The form of the WUS signal includes at least one of the following:

[0869] RACH;

[0870] Msg1;

[0871] Preamble sequence;

[0872] Sounding Reference Signal (SRS);

[0873] Physical Uplink Control Channel (PUCCH).

[0874] The configuration method of the WUS resource configuration information includes at least one of the following:

[0875] Configuring a signal resource list in the first information, where each element of the signal resource list corresponds one-to-one to the second access object or the second access object group index size, and an element in the signal resource list includes one or more resources;

[0876] Configuring a signal resource list in the first information, where each element of the signal resource list explicitly corresponds to the second access object or the second access object group index;

[0877] Configuring a candidate resource set in the first information, where one or more resources in the candidate resource set correspond to a resource number, one resource number corresponds to an index of a second access object or a second access object group, and the resource number is determined according to at least one of a time domain, a frequency domain, and a spatial domain;

[0878] One or more signal resources are configured for the second access object or the second access object group in the first information.

[0879] The signal resources configured by the WUS resource configuration information include at least one of the following:

[0880] The time-frequency resources are the same as the time-frequency resources of the common RACH on the first access object or the second access object group, that is, the common RACH on the first access object shares the same video resources;

[0881] The time-frequency resources are time-frequency resources of a dedicated RACH on the first access object or the second access object group, which is specifically used to trigger SSB transmission and / or RACH monitoring, wherein the time-frequency resources of the dedicated RACH and the dedicated RACH configuration may be completely different from the time-frequency resources used by the common RACH on the first access object, or may be part of the time-frequency resources of the common RACH on the first access object;

[0882] The time-frequency resources are the time-frequency resources of the dedicated SRS / PUCCH on the first access object or the second access object group used to trigger SSB transmission and / or RACH monitoring.

[0883] The grouping method of the second access object group includes at least one of the following:

[0884] Configured by network-side devices;

[0885] As stipulated by the agreement.

[0886] The grouping rule of the second access object group includes at least one of the following:

[0887] The second access objects in the same frequency band are grouped together;

[0888] The second access objects in the same frequency band interval are grouped together;

[0889] The second access objects having at least one of the same initial BWP, active BWP, SSB, and SCS are grouped together;

[0890] The second access objects with the same transmission mode are grouped together, wherein the transmission mode is related to at least one of the following: whether to send SSB, whether to perform RACH monitoring, and whether to support on-demand SSB transmission;

[0891] The second access object of the co-location is a group;

[0892] The second access objects with the same SSB sending period are grouped together.

[0893] The access object selection module 1002 is configured to select a target access object for performing a first operation from the first access object group and the second access object group according to the first information and the first rule, wherein the first operation includes residency or random access.

[0894] The first rule may be related to at least one of the following:

[0895] One or more access objects that the terminal can randomly access, as indicated or configured by the network-side device;

[0896] The access object to be randomly accessed by the terminal is defaulted to be the first access object;

[0897] Bar status information of the second access object;

[0898] an index value of the second access object;

[0899] a center frequency of the second access object;

[0900] a subcarrier spacing (SCS) of the second access object;

[0901] an identifier of the second access object;

[0902] a frequency interval between the second access object and the first access object;

[0903] Whether the second access object performs normal RACH monitoring;

[0904] Whether the second access object sends SSB normally;

[0905] Whether the second access object satisfies normal RACH monitoring and SSB transmission;

[0906] The number of times a WUS needs to be sent to the second access object;

[0907] the priority of the second access object;

[0908] a signal strength measurement value of a reference signal of the second access object, the signal strength comprising at least one of a reference signal received power (RSRP) and a signal to interference plus noise ratio (SINR);

[0909] Randomly generated access object index;

[0910] a weight value of the second access object;

[0911] Randomly generated access object weight value;

[0912] whether the first access object is a suitable cell;

[0913] Whether the second access object is a suitable cell.

[0914] The priority of the second access object may be explicitly indicated by the network-side device; or the priority of the second access object is related to at least one of the following:

[0915] ① The transmission mode of the second access object, which transmission mode includes one of whether SSB is sent normally, whether on-demand SSB transmission is supported, and whether RACH is monitored normally.

[0916] ② The frequency band interval between the second access object and the first access object;

[0917] ③The number of the second access object.

[0918] Two examples are given below to illustrate how the access object selection module 1002 selects a target access object for performing the first operation from the first access object and the second access object group based on the first information and the first rule. Other examples will be involved in the specific embodiments below, which are not described here in detail. See below for details.

[0919] First example

[0920] The access object selection module 1002 may be used to:

[0921] Determining whether the first access object is a suitable cell;

[0922] If the first access object is a suitable cell, selecting the first access object as a target access object;

[0923] If the first access object is not a suitable cell, executing the first step or the second step;

[0924] Wherein, the first step includes:

[0925] determining, according to a reference signal measurement result corresponding to at least one second access object in the second access object group and part or all of the SIBs of the at least one second access object included in the first information, whether the at least one second access object is a suitable cell;

[0926] In a case where one or more second access objects among the at least one second access object are suitable cells, a suitable cell is selected from the at least one second access object according to a first rule as a target access object for performing the first operation.

[0927] Wherein, the second step includes:

[0928] The second access object is ignored, and other suitable cells are searched as target access objects for performing the first operation.

[0929] Furthermore, searching for another suitable cell as a target access object for performing the first operation may include:

[0930] Searching for a suitable cell from one or more second access objects in the second access object group as a target access object for performing the first operation;

[0931] From one or more third access objects in the third access object group, find a suitable cell as the target access object for performing the first operation, wherein the third access object group includes the access objects in the second access object group that meet the third condition.

[0932] The third condition may include at least one of the following:

[0933] Taking the first access object as a reference;

[0934] co-located with the first access object;

[0935] A continuous access object belonging to the same frequency band as the first access object.

[0936] Second example

[0937] The access object selection module 1002 may be used to:

[0938] determining, according to the SSB measurement result sent by the first access object and the SIB of the first access object, whether the first access object is a suitable cell;

[0939] determining, according to a reference signal measurement result corresponding to at least one second access object in the second access object group and part or all of the SIBs of the at least one second access object included in the first information, whether the at least one second access object is a suitable cell;

[0940] When the first access object is a suitable cell and one or more of the at least one second access objects are suitable cells, a suitable cell is selected from the first access object and the at least one second access object according to a first rule as the target access object for performing the first operation.

[0941] It should be noted that the device shown in FIG10 can implement the method shown in FIG2 and can achieve the same technical effect, so the description is relatively simple. For relevant details, please refer to the description of the embodiment shown in FIG2 above.

[0942] Optionally, as shown in FIG11 , a random access device 1000 provided in an embodiment of the present application may further include:

[0943] The first WUS sending module 1003 is used to send a wake-up signal WUS to the target access object when the target access object belongs to the second access object group, the first information includes WUS configuration information of a wake-up signal for triggering the at least one second access object to send an SSB, or WUS configuration information for triggering SSB adaptation adjustment of the at least one second access object, and the first information includes WUS configuration information for triggering the at least one second access object to monitor the random access channel RACH, or WUS configuration information for triggering RACH monitoring adaptation adjustment of the at least one second access object, wherein the WUS is used to trigger the target access object to send an SSB and monitor at least one of RACH.

[0944] In an example, the first WUS sending module 1003 is configured to send a WUS to the target access object when a first condition is met.

[0945] The first condition may include at least one of the following:

[0946] 1) The first access object is not a suitable cell;

[0947] 2) The target access object is a suitable cell;

[0948] 3) performing intra-frequency or inter-frequency measurement on the target access object;

[0949] 4) The target access object is in a first energy-saving state, wherein the first energy-saving state includes at least one of not sending SSB, not sending SIB, not monitoring RACH, sending energy-saving SSB (such as Sparse SSB), sending energy-saving SIB (such as Sparse SIB), and energy-saving monitoring RACH (such as Sparse RACH monitoring), and the energy-saving SSB includes one of lightweight SSB, simplified SSB, sparse SSB and long-period SSB;

[0950] 5) The terminal is sensitive to access delay;

[0951] 6) The terminal is in the process of recovering from link failure.

[0952] In another example, the apparatus may further include: an assumption module, configured to assume that the target access object is in a second energy-saving state before sending the WUS for the target access object.

[0953] The second energy-saving state may include at least one of the following:

[0954] Do not send SIB, send SSB normally, and perform normal RACH monitoring;

[0955] Not sending an SIB, not sending an SSB, or sending an energy-saving SSB (such as a simplified SSB or a sparse SSB), taking the first access object as a reference, and performing normal RACH monitoring;

[0956] Do not send SIB, send SSB normally, and do not perform normal RACH monitoring;

[0957] No SIB is sent, no SSB is sent, or energy-saving SSB (such as simplified SSB or sparse SSB, etc.) is sent, and normal RACH monitoring is not performed.

[0958] In a first example, the first WUS sending module 1003 may be used to send a WUS for the target access object. The WUS may be used to achieve two purposes: one is to trigger the target access object to send SSB, and the other is to trigger the target access object to monitor RACH.

[0959] In a second example, the first WUS sending module 1003 may be used to: send a first WUS to the target access object, the first WUS being used to trigger the target access object to send SSB; and send a second WUS to the target access object, wherein the second WUS is used to trigger the target access object to monitor RACH.

[0960] Exemplarily, the first WUS sending module 1003 may be used for one of the following:

[0961] Z time slots / symbols / milliseconds after sending the first WUS, starting to send a second WUS for the target access object;

[0962] X time slots / symbols / milliseconds after receiving feedback on the first WUS, starting to send a second WUS for the target access object;

[0963] After receiving the first SSB sent after successfully triggering the target access object, start sending a second WUS for the target access object Y time slots / symbols / milliseconds;

[0964] When the number of times the first WUS is sent reaches a maximum, sending a second WUS for the target access object;

[0965] A first timer is started after sending the first WUS, and a second WUS for the target access object is sent after the first timer times out.

[0966] The embodiment shown in FIG11 provides a random access device 1000, which can trigger the second access object to send SSB or perform RACH monitoring on demand (on-demand), rather than continuously sending SSB or continuously performing RACH monitoring, or not sending SSB or not performing RACH monitoring. Therefore, it can save energy for the network side equipment while ensuring the capacity of the network side to the greatest extent possible.

[0967] Optionally, as shown in FIG12 , a random access device 1000 provided in an embodiment of the present application may further include:

[0968] The SSB monitoring module 1004 is used to monitor the SSB sent by the target access object when the WUS is used to trigger the SSB sending.

[0969] Exemplarily, the SSB monitoring module 1004 may be specifically configured to perform one of the following:

[0970] After sending the WUS, start a third timer, and after the third timer times out, start monitoring the SSB sent by the target access object;

[0971] After sending the WUS, start monitoring the SSB sent by the target access object C time slots / symbols / milliseconds later;

[0972] Start monitoring the SSB sent by the target access object in the next time slot after sending the WUS;

[0973] Within the SSB listening window configured in the first information, listen to the SSB sent by the target access object.

[0974] The embodiment shown in FIG12 provides a random access device 1000 that can trigger a target access object (a second access object) to send an SSB on demand (on-demand), thereby preparing for RACH at the target access object and increasing the capacity on the network side.

[0975] Optionally, as shown in FIG13 , a random access device 1000 provided in an embodiment of the present application may further include:

[0976] The operation initiating module 1005 is configured to initiate the first operation to the target access object.

[0977] Exemplarily, the target access object is a second access object, and the operation initiating module 1005 (the time point of initiating the first operation to the target access object) may specifically be used for one of the following:

[0978] After sending the WUS to the target access object, a second timer is started. After the second timer times out, the first operation is initiated to the target access object (such as initiating RACH. Accordingly, the WUS can be the same WUS used to trigger SSB sending and RACH monitoring, or the second WUS);

[0979] A time slots / symbols / milliseconds after sending the WUS to the target access object, initiating the first operation to the target access object (such as initiating RACH, and accordingly, the WUS can be the same WUS used to trigger SSB transmission and RACH monitoring, or the second WUS mentioned above);

[0980] After B time slots / symbols / milliseconds after receiving feedback from the WUS for the target access object, the first operation is initiated to the target access object (such as initiating RACH, and accordingly, the WUS can be the same WUS used to trigger SSB transmission and RACH monitoring, or it can be the above-mentioned second WUS).

[0981] Optionally, the random access device 1000 provided in the embodiment of the present application may further include:

[0982] The second WUS sending module is configured to send the wake-up signal WUS to the target access object again when a second condition is met.

[0983] The second condition may include but is not limited to at least one of the following:

[0984] 1)SSB detection failed;

[0985] 2) The number of random accesses reaches the maximum value;

[0986] The number of WUS transmissions is less than or equal to the preset maximum number of transmissions;

[0987] 3) No feedback was received for the previous WUS;

[0988] 4) The previous WUS is used to trigger the sending of SSB. After receiving the feedback for the previous WUS signal, another WUS is sent to trigger RACH monitoring (that is, the WUS is sent again to trigger RACH monitoring);

[0989] 5) No feedback for the previous WUS is received before the timer expires.

[0990] Optionally, the resent WUS signal has at least one of the following characteristics:

[0991] 1) Signal power increases;

[0992] 2) The time interval between the sending of the last WUS is greater than the preset time interval;

[0993] 3) Frequency domain resources and sequence resources are the same as those of the previous WUS.

[0994] As shown in FIG. 14 , an embodiment of the present application provides a communication device 1400 , which may include: an information sending module 1401 .

[0995] The information sending module 1401 is used to send first information about a second access object group to the terminal through a first access object, wherein the second access object group includes one or more second access objects different from the first access object, and the first information includes system information SIB of the second access object. The first information is used by the terminal to select a target access object for performing a first operation, wherein the first operation includes residence or random access, and the access object includes one of a carrier, a cell, and a bandwidth part BWP.

[0996] The access object may include one of a carrier, a cell, and a bandwidth part (BWP). A random access method proposed in an embodiment of the present application is for a scenario with multiple access objects, and is mainly described below by taking a multi-carrier scenario as an example.

[0997] In one embodiment, in a multi-carrier scenario, the first access target may be an anchor carrier, and the second access target may be a non-anchor carrier. On the anchor carrier, the UE can obtain system information of the anchor carrier and necessary system information of other non-anchor carriers. The UE can also perform at least one of random access (RACH), data transmission, and data reception on either the anchor carrier or the non-anchor carrier.

[0998] In another embodiment, in a multi-carrier scenario, the first access object may be a carrier that normally sends SSBs, and the second access object may be a carrier that abnormally sends SSBs (SSB-less carrier).

[0999] The first information may be sent by the first access object through a broadcast message; or, it is assumed that the first information is the same as the corresponding information of the first access object.

[1000] The system information of the second access object included in the first information includes at least one of the following:

[1001] All or part of the SIBs of the second access object, where the part of the SIBs may include at least one of: public land mobile network (PLMN) information, configuration information related to cell selection criteria, configuration information related to cell reselection criteria, and cell barring information;

[1002] The SIB1 status information of the second access object includes at least one of: SIB1 is not sent and SIB1 is carried by the system information of the first access object.

[1003] The first information corresponds to at least one second access object in the second access object group, and the first information further includes at least one of the following:

[1004] 1) WUS configuration information for triggering the at least one second access object to send an SSB, or WUS configuration information for triggering adaptive adjustment of the SSB of the at least one second access object, wherein the SSB includes at least one of a synchronization signal block and a physical broadcast channel block;

[1005] 2) WUS configuration information for triggering RACH monitoring of the at least one second access object, or WUS configuration information for triggering RACH monitoring adaptation (RACH adaptation) of the at least one second access object;

[1006] 3) The configuration information related to the SSB currently being sent by the at least one second access object may specifically include at least one of the following:

[1007] whether the at least one second access object is sending an SSB;

[1008] At least one of the frequency of the SSB being sent by the at least one second access object, the SSB sending period, and the number of SSBs in a sending period;

[1009] The at least one second access object is sending an SSB transmission mode, and the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, a compact transmission mode, a long-cycle transmission mode (the transmission cycle of SSB is long) and an on-demand transmission mode, wherein the energy-saving transmission mode can be a simplified transmission mode that only sends a primary synchronization signal (PSS) and a secondary synchronization signal (SSS), and the compact transmission mode can be a mode in which there is no time domain gap between multiple SSBs.

[1010] 4) Configuration information related to the RACH monitoring behavior currently in which the at least one second access object is located may specifically include at least one of the following:

[1011] whether the at least one second access object performs RACH monitoring;

[1012] At least one of a transmission period of the RACH being monitored by the at least one second access object, the number of RACHs in a transmission period, RACH frequency domain resource configuration information, and RACH time domain resource configuration information;

[1013] The at least one second access object monitors the RACH in a monitoring mode, where the monitoring mode includes one of a normal monitoring mode, a simplified monitoring mode (e.g., a reduced RO opportunity), an aggregated monitoring mode, and an on-demand monitoring mode, wherein the simplified monitoring mode may include a reduced RO opportunity, the aggregated monitoring mode may be a monitoring mode with no time domain gap between multiple ROs, and RO is the abbreviation of physical random access channel opportunity (PRACH Occasion).

[1014] 5) SSB configuration information sent after successful WUS triggering, which may include at least one of the following:

[1015] After the WUS is successfully triggered, at least one of the frequency of sending SSB, the period of sending SSB, and the number of SSBs in one sending period of the at least one second access object;

[1016] After the WUS is successfully triggered, the at least one second access object sends a listening window for the SSB, that is, the UE listens to the SSB within the listening window;

[1017] After the WUS is successfully triggered, the at least one time domain resource index or the position of at least one time domain resource of the at least one second access object actually sending the SSB;

[1018] After the WUS is successfully triggered, at least one of the transmission time length, the number of SSB transmission times, and the number of SSB transmission cycles of the at least one second access object;

[1019] After the WUS is successfully triggered, the relative relationship between the SSB sent by the at least one second access object and the SSB sent by the first access object in at least one of the time domain, frequency domain, and spatial domain;

[1020] After the WUS is successfully triggered, the time domain resource position of the first SSB sent by the at least one second access object is, for example, sent in the most recent SSB period of X time slots / symbols after the trigger signal (WUS) is sent;

[1021] After the WUS is triggered successfully, the at least one second access object sends the SSB transmission mode, and the transmission mode includes one of the normal transmission mode, the energy-saving transmission mode (for example, only sending PSS and SSS), the aggregated transmission mode (for example, there is no time domain interval between multiple SSBs), the long-cycle transmission mode (SSB cycle is longer) and the on-demand transmission mode.

[1022] 6) Configuration information related to RACH monitoring after successful WUS triggering, which may include:

[1023] After the WUS is triggered successfully, the at least one second access object monitors at least one of the RACH monitoring period, the number of RACHs monitored, the frequency domain resource configuration information of the RACH monitored, the time domain resource configuration information of the RACH monitored, and the monitoring mode of the RACH monitored, wherein the monitoring mode includes a normal monitoring mode, a simplified monitoring mode (for example, reducing RO opportunities), an aggregated monitoring mode (no time domain interval between multiple ROs), and an on-demand monitoring mode.

[1024] 7) The characteristic information of the at least one second access object may include at least one of the following:

[1025] identification information of the at least one second access object;

[1026] whether the at least one second access object can use the first access object as a reference access object;

[1027] whether the at least one second access object is co-located with the first access object;

[1028] whether the at least one second access object and the first access object are in the same timing advance group (TAG);

[1029] whether the at least one second access object has a Quasi Co-Location (QCL) relationship with the first access object;

[1030] a reference access object of the at least one second access object;

[1031] an access object co-located with the at least one second access object;

[1032] an access object that is located in the same TAG as the at least one second access object;

[1033] an access object having a QCL relationship with the at least one second access object;

[1034] Whether the at least one second access object is in a prohibited Bar state;

[1035] The priority of the at least one second access object when the UE performs random access channel selection;

[1036] whether the at least one second access object is set to a Bar state for a first type of UE, wherein the first type includes at least one of reduced capability (Redcap), non-terrestrial network (NTN), and support for a network energy saving (NES) function;

[1037] The characteristic value N of the UE ID of the at least one second access object allowing random access, for example, a UE with UE ID mod number of carriers=N can perform random access on the carrier;

[1038] whether the at least one second access object supports UE residency;

[1039] Whether the at least one second access object is a suitable cell;

[1040] Whether the at least one second access object supports cell selection and / or cell reselection.

[1041] The WUS configuration information included in the first information may include at least one of the following:

[1042] 1) WUS synchronization reference configuration information, which may include at least one of the following:

[1043] At least one of an SSB, a channel state information reference signal (CSI-RS), and a tracking reference signal (TRS) of the first access object;

[1044] GPS timing.

[1045] 2) WUS resource configuration information, which may include at least one of the following:

[1046] Time domain resource information;

[1047] Frequency domain resource information;

[1048] The signal sequence configuration information, for example, a preamble group, may specifically indicate a preamble group index, indicating that the preamble group is used to trigger the SSB of the at least one second access object.

[1049] 3) WUS power configuration information, which may include at least one of the following:

[1050] Initial signal power;

[1051] Signal power ramp-up step size.

[1052] 4) WUS retransmission configuration information may include at least one of the following:

[1053] The number of repetitions of a single signal transmission;

[1054] The maximum number of repetitions sent by the channel.

[1055] 5) WUS airspace parameter configuration information, which may include at least one of the following:

[1056] A correspondence between the WUS and the SSB of the first access object;

[1057] a correspondence between the WUS and the SSB of the at least one second access object;

[1058] The correspondence between WUS and the SSB of the second access object group.

[1059] 6) WUS sending timer configuration information. The timer is used to prevent WUS from being sent too frequently. Generally, the timer is started after the WUS is sent. Repeated WUS sending is not allowed before the timer expires.

[1060] The form of the WUS signal includes at least one of the following:

[1061] RACH;

[1062] Msg1;

[1063] Preamble sequence;

[1064] Sounding Reference Signal (SRS);

[1065] Physical Uplink Control Channel (PUCCH).

[1066] The configuration method of the WUS resource configuration information includes at least one of the following:

[1067] Configuring a signal resource list in the first information, where each element of the signal resource list corresponds one-to-one to the second access object or the second access object group index size, and an element in the signal resource list includes one or more resources;

[1068] Configuring a signal resource list in the first information, where each element of the signal resource list explicitly corresponds to the second access object or the second access object group index;

[1069] Configuring a candidate resource set in the first information, where one or more resources in the candidate resource set correspond to a resource number, one resource number corresponds to an index of a second access object or a second access object group, and the resource number is determined according to at least one of a time domain, a frequency domain, and a spatial domain;

[1070] One or more signal resources are configured for the second access object or the second access object group in the first information.

[1071] The signal resources configured by the WUS resource configuration information include at least one of the following:

[1072] The time-frequency resources are the same as the time-frequency resources of the common RACH on the first access object or the second access object group, that is, the common RACH on the first access object shares the same video resources;

[1073] The time-frequency resources are time-frequency resources of a dedicated RACH on the first access object or the second access object group, which is specifically used to trigger SSB transmission and / or RACH monitoring, wherein the time-frequency resources of the dedicated RACH and the dedicated RACH configuration may be completely different from the time-frequency resources used by the common RACH on the first access object, or may be part of the time-frequency resources of the common RACH on the first access object;

[1074] The time-frequency resources are the time-frequency resources of the dedicated SRS / PUCCH on the first access object or the second access object group used to trigger SSB transmission and / or RACH monitoring.

[1075] The grouping method of the second access object group includes at least one of the following:

[1076] Configured by network-side devices;

[1077] As stipulated by the agreement.

[1078] The grouping rule of the second access object group includes at least one of the following:

[1079] The second access objects in the same frequency band are grouped together;

[1080] The second access objects in the same frequency band interval are grouped together;

[1081] The second access objects having at least one of the same initial BWP, active BWP, SSB, and SCS are grouped together;

[1082] The second access objects with the same transmission mode are grouped together, wherein the transmission mode is related to at least one of the following: whether to send SSB, whether to perform RACH monitoring, and whether to support on-demand SSB transmission;

[1083] The second access object of the co-location is a group;

[1084] The second access objects with the same SSB sending period are grouped together.

[1085] Optionally, a communication device 1400 provided in an embodiment of the present application may further include:

[1086] A first WUS receiving module is configured to, when the target access object belongs to the second access object group, and the first information includes WUS configuration information for triggering the at least one second access object to send an SSB, or WUS configuration information for triggering the SSB adaptive adjustment of the at least one second access object, and the first information includes WUS configuration information for triggering the at least one second access object to monitor the random access channel RACH, or WUS configuration information for triggering the at least one second access object to monitor the RACH adaptive adjustment, the target access object receives a wake-up signal WUS, wherein the WUS is used to trigger the target access object to send an SSB and monitor at least one of RACH.

[1087] In an example, the WUS is sent by the terminal when a first condition is met, where the first condition may include at least one of the following:

[1088] 1) The first access object is not a suitable cell;

[1089] 2) The target access object is a suitable cell;

[1090] 3) performing intra-frequency or inter-frequency measurement on the target access object;

[1091] 4) The target access object is in a first energy-saving state, wherein the first energy-saving state includes at least one of not sending SSB, not sending SIB, not monitoring RACH, sending energy-saving SSB (such as Sparse SSB), sending energy-saving SIB (such as Sparse SIB), and energy-saving monitoring RACH (such as Sparse RACH monitoring), and the energy-saving SSB includes one of lightweight SSB, simplified SSB, sparse SSB and long-period SSB;

[1092] 5) The terminal is sensitive to access delay;

[1093] 6) The terminal is in the process of recovering from link failure.

[1094] In another example, the wake-up signal WUS for the target access object is sent by the terminal under the assumption that the target access object is in the second energy-saving state.

[1095] The second energy-saving state may include at least one of the following:

[1096] Do not send SIB, send SSB normally, and perform normal RACH monitoring;

[1097] Not sending an SIB, not sending an SSB, or sending an energy-saving SSB (such as a simplified SSB or a sparse SSB), taking the first access object as a reference, and performing normal RACH monitoring;

[1098] Do not send SIB, send SSB normally, and do not perform normal RACH monitoring;

[1099] No SIB is sent, no SSB is sent, or energy-saving SSB (such as simplified SSB or sparse SSB, etc.) is sent, and normal RACH monitoring is not performed.

[1100] In a first example, the first WUS receiving module is used for: the target access object receives a WUS, and the WUS can be used to achieve two purposes: one is to trigger the target access object to send SSB, and the other is to trigger the target access object to monitor RACH.

[1101] In the second example, the first WUS receiving module is used for: the target access object receives a first WUS, and the first WUS is used to trigger the target access object to send SSB; the target access object receives a second WUS, wherein the second WUS is used to trigger the target access object to monitor RACH.

[1102] Exemplarily, the first WUS receiving module is used for one of the following:

[1103] The target access object receives a second WUS for the target access object that is sent by the terminal Z time slots / symbols / milliseconds after the terminal sends the first WUS;

[1104] The target access object receives a second WUS for the target access object that is sent by the terminal X time slots / symbols / milliseconds after the terminal receives feedback on the first WUS;

[1105] The target access object receives a second WUS for the target access object sent by the terminal when the number of times the first WUS is sent reaches a maximum value;

[1106] The target access object receives a second WUS for the target access object sent by the terminal after a first timer times out, wherein the first timer is started after sending the first WUS.

[1107] This embodiment provides a communication method that can trigger the second access object to send SSB or perform RACH monitoring on demand (on-demand), rather than continuously sending SSB or continuously performing RACH monitoring, or not sending SSB or not performing RACH monitoring. Therefore, it can save energy for the network side equipment while ensuring the capacity of the network side to the greatest extent possible.

[1108] Optionally, a communication device 1400 provided in an embodiment of the present application may further include: a signal sending module, configured to cause the target access object to send an SSB when the WUS is used to trigger the sending of an SSB. This allows the target access object to send an SSB on demand (on-demand) under the triggering of the WUS, thereby preparing for access to the target access object and increasing the capacity on the network side.

[1109] Optionally, a communication device 1400 provided in an embodiment of the present application may further include: a monitoring module, configured for the target access object to monitor a first operation initiated by the terminal, such as monitoring a RACH initiated by the terminal to the target access object.

[1110] Optionally, a communication device 1400 provided in an embodiment of the present application may further include:

[1111] The second WUS receiving module is configured to receive a wake-up signal WUS for the target access object sent again by the terminal when the second condition is met, so as to improve the success rate of executing the first operation.

[1112] The second condition may include but is not limited to at least one of the following:

[1113] 1)SSB detection failed;

[1114] 2) The number of random accesses reaches the maximum value;

[1115] The number of WUS transmissions is less than or equal to the preset maximum number of transmissions;

[1116] 3) No feedback was received for the previous WUS;

[1117] 4) The previous WUS is used to trigger the sending of SSB. After receiving the feedback for the previous WUS signal, another WUS is sent to trigger RACH monitoring (that is, the WUS is sent again to trigger RACH monitoring);

[1118] 5) No feedback for the previous WUS is received before the timer expires.

[1119] Optionally, the resent WUS signal has at least one of the following characteristics:

[1120] 1) Signal power increases;

[1121] 2) The time interval between the sending of the last WUS is greater than the preset time interval;

[1122] 3) Frequency domain resources and sequence resources are the same as those of the previous WUS.

[1123] It should be noted that the device shown in FIG14 can implement the method shown in FIG9 and can achieve the same technical effect, so the description is relatively simple. For relevant points, please refer to the description of the embodiment shown in FIG9 above.

[1124] It should be noted that the communication device in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or chip. The electronic device can be a terminal or other device other than a terminal. For example, the terminal can include but is not limited to the types of terminal 11 listed above, and other devices can be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[1125] Optionally, as shown in Figure 15, an embodiment of the present application further provides a communication device 1500, including a processor 1501 and a memory 1502, wherein the memory 1502 stores a program or instruction that can be run on the processor 1501. For example, when the communication device 1500 is a terminal, the program or instruction is executed by the processor 1501 to implement the various steps of the above-mentioned random access method or communication method embodiment, and can achieve the same technical effect. When the communication device 1500 is a terminal, the program or instruction is executed by the processor 1501 to implement the various steps of the above-mentioned random access method embodiment, and can achieve the same technical effect. To avoid repetition, it is not repeated here. When the communication device 1500 is a network side device, the program or instruction is executed by the processor 1501 to implement the various steps of the above-mentioned communication method embodiment, and can achieve the same technical effect. To avoid repetition, it is not repeated here.

[1126] An embodiment of the present application also provides a terminal, including a processor and a communication interface, wherein the communication interface is used to receive first information about a second access object group sent by a network-side device through a first access object, wherein the second access object group contains one or more second access objects different from the first access object, and the first information contains system information SIB of the second access object; the processor is used to select a target access object for performing a first operation in the first access object and the second access object group according to the first information and a first rule, wherein the first operation includes residency or random access. This terminal embodiment corresponds to the above-mentioned terminal-side method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to this terminal embodiment and can achieve the same technical effect. Specifically, Figure 16 is a schematic diagram of the hardware structure of a terminal that implements an embodiment of the present application.

[1127] The terminal 1600 includes but is not limited to: a radio frequency unit 1601, a network module 1602, an audio output unit 1603, an input unit 1604, a sensor 1605, a display unit 1606, a user input unit 1607, an interface unit 1608, a memory 1609 and at least some of the components of the processor 1610.

[1128] Those skilled in the art will appreciate that the terminal 1600 may also include a power supply (such as a battery) to power various components. The power supply may be logically connected to the processor 1610 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The terminal structure shown in FIG16 does not limit the terminal. The terminal may include more or fewer components than shown, or combine certain components, or arrange the components differently, which will not be described in detail here.

[1129] It should be understood that in an embodiment of the present application, the input unit 1604 may include a graphics processing unit (GPU) 16041 and a microphone 16042, and the graphics processor 16041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 1606 may include a display panel 16061, and the display panel 16061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1607 includes a touch panel 16071 and at least one of the other input devices 16072. The touch panel 16071 is also called a touch screen. The touch panel 16071 may include two parts: a touch detection device and a touch controller. Other input devices 16072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[1130] In the embodiment of the present application, after receiving downlink data from a network-side device, the RF unit 1601 may transmit the data to the processor 1610 for processing. Furthermore, the RF unit 1601 may send uplink data to the network-side device. Typically, the RF unit 1601 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[1131] The memory 1609 can be used to store software programs or instructions and various data. The memory 1609 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, applications or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 1609 may include a volatile memory or a non-volatile memory, or the memory 1609 may include both volatile and non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DRRAM). The memory 1609 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[1132] Processor 1610 may include one or more processing units. Optionally, processor 1610 integrates an application processor and a modem processor. The application processor primarily handles operations related to the operating system, user interface, and application programs, while the modem processor primarily processes wireless communication signals, such as a baseband processor. It is understood that the modem processor may not be integrated into processor 1610.

[1133] Among them, the radio frequency unit 1601 can be used to receive first information about the second access object group sent by the network side device through the first access object, wherein the second access object group includes one or more second access objects different from the first access object, and the first information includes the system information SIB of the second access object.

[1134] Among them, the processor 1610 can be used to select a target access object for performing a first operation from the first access object and the second access object group according to the first information and the first rule, wherein the first operation includes residence or random access, and the access object includes one of a carrier, a cell, and a bandwidth part BWP.

[1135] In an embodiment of the present application, since the terminal 1600 can provide the first information and the first rule about the second access object group to the terminal through the first access object according to the network side device, and select the target access object to be resident or randomly accessed from the first access object and the second access object group, there is no need for the second access object to continuously send SSB, SIB and other information. Therefore, it is possible to ensure the capacity of the network side as much as possible while saving energy on the network side.

[1136] An embodiment of the present application also provides a network-side device, including a processor and a communication interface, the communication interface being configured to send first information about a second access object group to a terminal via a first access object, wherein the second access object group includes one or more second access objects different from the first access object, the first information including system information SIB of the second access object, and the first information being used by the terminal to select a target access object for performing a first operation, wherein the first operation includes resident or random access. This network-side device embodiment corresponds to the above-mentioned network-side device method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment are applicable to this network-side device embodiment and can achieve the same technical effect.

[1137] Specifically, embodiments of the present application also provide a network-side device. As shown in Figure 17, the network-side device 1700 includes an antenna 1701, a radio frequency device 1702, a baseband device 1703, a processor 1704, and a memory 1705. Antenna 1701 is connected to radio frequency device 1702. In the uplink direction, radio frequency device 1702 receives information via antenna 1701 and sends the received information to baseband device 1703 for processing. In the downlink direction, baseband device 1703 processes the information to be transmitted and sends it to radio frequency device 1702. Radio frequency device 1702 processes the received information and then sends it through antenna 1701.

[1138] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 1703 , which includes a baseband processor.

[1139] The baseband device 1703 may include, for example, at least one baseband board, on which multiple chips are arranged, as shown in Figure 17, one of which is, for example, a baseband processor, which is connected to the memory 1705 through a bus interface to call the program in the memory 1705 and execute the network device operations shown in the above method embodiment.

[1140] The network side device may further include a network interface 1706 , which is, for example, a common public radio interface (CPRI).

[1141] Specifically, the network side device 17000 of an embodiment of the present invention also includes: instructions or programs stored in the memory 1705 and executable on the processor 1704. The processor 1704 calls the instructions or programs in the memory 1705 to execute the methods executed by the modules shown in FIG14 and achieve the same technical effect. To avoid repetition, they will not be elaborated here.

[1142] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, each process of the above-mentioned random access method or communication method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[1143] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[1144] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, the communication interface and the processor are coupled, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned random access method or communication method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[1145] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[1146] An embodiment of the present application further provides a computer program / program product, which is stored in a non-volatile storage medium. The computer program / program product is executed by at least one processor to implement the various processes of the above-mentioned random access method or communication method embodiment, and can achieve the same technical effect. To avoid repetition, it is not repeated here.

[1147] An embodiment of the present application also provides a communication system, including: a terminal and a network-side device, wherein the terminal can be used to execute the steps of the random access method as described in Figure 2, and the network-side device can be used to execute the steps of the communication method as described in Figure 9.

[1148] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[1149] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better embodiment. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present application.

[1150] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A random access method, the method comprising: The terminal receives first information about a second access object group sent by a network side device through a first access object, wherein the second access object group includes one or more second access objects different from the first access object, and the first information includes system information SIB of the second access object; The terminal selects a target access object for performing a first operation from the first access object and the second access object group based on the first information and the first rule, wherein the first operation includes residence or random access, and the access object includes one of a carrier, a cell, and a bandwidth part BWP.

2. The method according to claim 1, wherein: The system information SIB of the second access object includes at least one of the following: All or part of the SIBs of the second access object; The system information block 1 SIB1 status information of the second access object, the SIB1 status information including at least one of: SIB1 is not sent and SIB1 is carried by the system information of the first access object.

3. The method according to claim 1, wherein: The first information corresponds to at least one second access object in the second access object group, and the first information further includes at least one of the following: WUS configuration information for triggering the at least one second access object to send a wake-up signal of an SSB, or WUS configuration information for triggering SSB adaptive adjustment of the at least one second access object, wherein the SSB includes at least one of a synchronization signal block and a physical broadcast channel block; WUS configuration information for triggering random access channel RACH monitoring of the at least one second access object, or WUS configuration information for triggering RACH monitoring adaptive adjustment of the at least one second access object; Configuration information related to the SSB currently being sent by the at least one second access object; Configuration information related to the RACH monitoring behavior currently in which the at least one second access object is located; SSB configuration information sent after WUS triggers successfully; Configuration information related to RACH monitoring after successful triggering by WUS; The characteristic information of the at least one second access object itself.

4. The method according to any one of claims 1 to 3, wherein: The first rule is related to at least one of the following: One or more access objects that the terminal can randomly access, as indicated or configured by the network side device; The access object that the terminal wants to randomly access is defaulted to be the first access object; Bar status information of the second access object; An index value of the second access object; The center frequency of the second access object; The subcarrier spacing SCS of the second access object; an identifier of the second access object; a frequency interval between the second access object and the first access object; Whether the second access object performs normal RACH monitoring; Whether the second access object sends SSB normally; Whether the second access object satisfies normal RACH monitoring and normal SSB transmission; The number of times a WUS needs to be sent to the second access object; The priority of the second access object; A signal strength measurement value of a reference signal of the second access object, wherein the signal strength includes at least one of a reference signal received power RSRP and a signal to interference plus noise ratio SINR; Randomly generated access object index; a weight value of the second access object; Randomly generated access object weight value; whether the first access object is a suitable cell; Whether the second access object is a suitable cell.

5. The method according to claim 1, wherein: The selecting, according to the first information and the first rule, a target access object for performing a first operation from the first access object group and the second access object group includes: Determining whether the first access object is a suitable cell; In a case where the first access object is a suitable cell, selecting the first access object as a target access object; When the first access object is not a suitable cell, executing the first step or the second step; Wherein, the first step comprises: Determine, according to a reference signal measurement result corresponding to at least one second access object in the second access object group and part or all of the SIBs of the at least one second access object included in the first information, whether the at least one second access object is a suitable cell; In a case where one or more second access objects among the at least one second access object are suitable cells, selecting a suitable cell from the at least one second access object as a target access object for performing the first operation according to a first rule; Wherein, the second step comprises: The second access object is ignored, and other suitable cells are searched as target access objects for performing the first operation.

6. The method according to claim 5, wherein: The searching for other suitable cells as target access objects for performing the first operation includes: Searching for a suitable cell from one or more second access objects in the second access object group as a target access object for performing the first operation; Searching for a suitable cell as a target access object for performing the first operation from one or more third access objects in a third access object group, wherein the third access object group includes access objects in the second access object group that meet a third condition; The third condition includes at least one of the following: Taking the first access object as a reference; co-located with the first access object; A continuous access object belonging to the same frequency band as the first access object.

7. The method according to claim 1, wherein: The selecting, according to the first information and the first rule, a target access object for performing a first operation from the first access object group and the second access object group includes: Determining whether the first access object is a suitable cell according to the SSB measurement result sent by the first access object and the SIB of the first access object; Determine whether the at least one second access object is a suitable cell according to a reference signal measurement result corresponding to at least one second access object in the second access object group and part or all of the SIBs of the at least one second access object included in the first information; When the first access object is a suitable cell and one or more of the at least one second access objects are suitable cells, a suitable cell is selected from the first access object and the at least one second access object according to a first rule as the target access object for performing the first operation.

8. The method according to claim 3, wherein: The target access object belongs to the second access object group, the first information includes WUS configuration information for triggering the at least one second access object to send a wake-up signal for SSB, or WUS configuration information for triggering SSB adaptive adjustment of the at least one second access object, and the first information includes WUS configuration information for triggering random access channel RACH monitoring of the at least one second access object, or WUS configuration information for triggering RACH monitoring adaptive adjustment of the at least one second access object, and the method further includes: The terminal sends a wake-up signal WUS to the target access object, wherein the WUS is used to trigger the target access object to send at least one of SSB and monitor RACH.

9. The method according to claim 8, wherein: The terminal sends a wake-up signal WUS to the target access object, including: When the first condition is met, the terminal sends a WUS for the target access object; Wherein, the first condition includes at least one of the following: The first access object is not a suitable cell; The target access object is a suitable cell; Performing intra-frequency or inter-frequency measurement on the target access object; The target access object is in a first energy-saving state, wherein the first energy-saving state includes at least one of not sending SSB, not sending SIB, not monitoring RACH, sending energy-saving SSB, sending energy-saving SIB, and energy-saving monitoring RACH, and the energy-saving SSB includes one of lightweight SSB, simplified SSB, sparse SSB, and long-period SSB; The terminal is sensitive to access delay; The terminal is in the process of recovering from a link failure.

10. The method according to claim 8 or 9, wherein: The terminal sends a wake-up signal WUS to the target access object, including: The terminal sends a first WUS for the target access object, where the first WUS is used to trigger the target access object to send an SSB; The terminal sends a second WUS for the target access object, wherein the second WUS is used to trigger the target access object to monitor RACH.

11. The method according to claim 8, wherein: The WUS is used to trigger the target access object to send an SSB, and the method further includes: The terminal monitors the SSB sent by the target access object.

12. The method according to claim 11, wherein: The monitoring of the SSB sent by the target access object includes the following: After sending the WUS, start a third timer, and after the third timer times out, start monitoring the SSB sent by the target access object; After sending the WUS, C time slots / symbols / milliseconds, start monitoring the SSB sent by the target access object; Start monitoring the SSB sent by the target access object in the next time slot after sending the WUS; Within the SSB listening window configured in the first information, listen to the SSB sent by the target access object.

13. The method according to claim 11, wherein: The method further comprises: The terminal initiates the first operation to the target access object.

14. The method according to claim 13, wherein: The target access object is a second access object, wherein initiating the first operation to the target access object includes one of the following: After sending the WUS to the target access object, starting a second timer, and after the second timer times out, initiating the first operation to the target access object; A time slots / symbols / milliseconds after sending the WUS to the target access object, initiating the first operation to the target access object; After receiving feedback of the WUS for the target access object, B time slots / symbols / milliseconds, the first operation is initiated to the target access object.

15. A communication method, the method comprising: The network side device sends first information about a second access object group to the terminal through a first access object, wherein the second access object group includes one or more second access objects different from the first access object, and the first information includes system information SIB of the second access object. The first information is used by the terminal to select a target access object for performing a first operation, wherein the first operation includes residence or random access, and the access object includes one of a carrier, a cell, and a bandwidth part BWP.

16. The method according to claim 15, wherein: The system information SIB of the second access object includes at least one of the following: All or part of the SIBs of the second access object; The system information block 1 SIB1 status information of the second access object, the SIB1 status information including at least one of: SIB1 is not sent and SIB1 is carried by the system information of the first access object.

17. The method according to claim 15, wherein: The first information corresponds to at least one second access object in the second access object group, and the first information further includes at least one of the following: WUS configuration information for triggering the at least one second access object to send a wake-up signal of an SSB, or WUS configuration information for triggering SSB adaptive adjustment of the at least one second access object, wherein the SSB includes at least one of a synchronization signal block and a physical broadcast channel block; WUS configuration information for triggering random access channel RACH monitoring of the at least one second access object, or WUS configuration information for triggering RACH monitoring adaptive adjustment of the at least one second access object; Configuration information related to the SSB currently being sent by the at least one second access object; Configuration information related to the RACH monitoring behavior currently in which the at least one second access object is located; SSB configuration information sent after WUS triggers successfully; Configuration information related to RACH monitoring after successful triggering by WUS; The characteristic information of the at least one second access object itself.

18. The method according to claim 17, wherein: The target access object belongs to the second access object group, the first information includes WUS configuration information for triggering the at least one second access object to send a wake-up signal for SSB, or WUS configuration information for triggering SSB adaptive adjustment of the at least one second access object, and the first information includes WUS configuration information for triggering random access channel RACH monitoring of the at least one second access object, or WUS configuration information for triggering RACH monitoring adaptive adjustment of the at least one second access object, and the method further includes: The target access object receives a wake-up signal WUS, wherein the WUS is used to trigger the target access object to send at least one of SSB and monitor RACH.

19. The method according to claim 18, wherein: The WUS is sent by the terminal when a first condition is met, wherein the first condition includes at least one of the following: The first access object is not a suitable cell; The target access object is a suitable cell; Performing intra-frequency or inter-frequency measurement on the target access object; The target access object is in a first energy-saving state, wherein the first energy-saving state includes at least one of not sending SSB, not sending SIB, not monitoring RACH, sending energy-saving SSB, sending energy-saving SIB, and energy-saving monitoring RACH, and the energy-saving SSB includes one of lightweight SSB, simplified SSB, sparse SSB, and long-period SSB; The terminal is sensitive to access delay; The terminal is in the process of recovering from a link failure.

20. The method according to claim 18 or 19, wherein: The receiving a wake-up signal WUS for the target access object includes: The target access object receives a first WUS, where the first WUS is used to trigger the target access object to send an SSB; The target access object receives a second WUS, wherein the second WUS is used to trigger the target access object to monitor RACH.

21. The method according to claim 18, wherein: Also includes: The target access object monitors the first operation initiated by the terminal.

22. A random access device, comprising: An information receiving module, configured to receive first information about a second access object group sent by a network side device through a first access object, wherein the second access object group includes one or more second access objects different from the first access object, and the first information includes system information SIB of the second access object; An access object selection module is used to select a target access object for performing a first operation from the first access object group and the second access object group according to the first information and the first rule, wherein the first operation includes residence or random access.

23. The device according to claim 22, wherein: The first information corresponds to at least one second access object in the second access object group, and the first information further includes at least one of the following: WUS configuration information for triggering the at least one second access object to send a wake-up signal of an SSB, or WUS configuration information for triggering SSB adaptive adjustment of the at least one second access object, wherein the SSB includes at least one of a synchronization signal block and a physical broadcast channel block; WUS configuration information for triggering random access channel RACH monitoring of the at least one second access object, or WUS configuration information for triggering RACH monitoring adaptive adjustment of the at least one second access object; Configuration information related to the SSB currently being sent by the at least one second access object; Configuration information related to the RACH monitoring behavior currently in which the at least one second access object is located; SSB configuration information sent after WUS triggers successfully; Configuration information related to RACH monitoring after successful triggering by WUS; The characteristic information of the at least one second access object itself.

24. The device according to claim 22, wherein: The first rule is related to at least one of the following: One or more access objects that the terminal can randomly access as indicated or configured by the network side device; The access object that the terminal wants to randomly access is defaulted to be the first access object; Bar status information of the second access object; An index value of the second access object; The center frequency of the second access object; The subcarrier spacing SCS of the second access object; an identifier of the second access object; a frequency interval between the second access object and the first access object; Whether the second access object performs normal RACH monitoring; Whether the second access object sends SSB normally; Whether the second access object satisfies normal RACH monitoring and normal SSB transmission; The number of times a WUS needs to be sent to the second access object; The priority of the second access object; A signal strength measurement value of a reference signal of the second access object, wherein the signal strength includes at least one of a reference signal received power RSRP and a signal to interference plus noise ratio SINR; Randomly generated access object index; a weight value of the second access object; Randomly generated access object weight value; whether the first access object is a suitable cell; Whether the second access object is a suitable cell.

25. A communication device, the device comprising: An information sending module is used to send first information about a second access object group to a terminal through a first access object, wherein the second access object group includes one or more second access objects different from the first access object, and the first information includes system information SIB of the second access object. The first information is used by the terminal to select a target access object for performing a first operation, wherein the first operation includes residence or random access, and the access object includes one of a carrier, a cell, and a bandwidth part BWP.

26. The device according to claim 25, wherein The first information corresponds to at least one second access object in the second access object group, and the first information further includes at least one of the following: WUS configuration information for triggering the at least one second access object to send a wake-up signal of an SSB, or WUS configuration information for triggering SSB adaptive adjustment of the at least one second access object, wherein the SSB includes at least one of a synchronization signal block and a physical broadcast channel block; WUS configuration information for triggering random access channel RACH monitoring of the at least one second access object, or WUS configuration information for triggering RACH monitoring adaptive adjustment of the at least one second access object; Configuration information related to the SSB currently being sent by the at least one second access object; Configuration information related to the RACH monitoring behavior currently in which the at least one second access object is located; SSB configuration information sent after WUS triggers successfully; Configuration information related to RACH monitoring after successful triggering by WUS; The characteristic information of the at least one second access object itself.

27. A terminal, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the random access method according to any one of claims 1 to 14 are implemented.

28. A network side device, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the communication method according to any one of claims 15 to 21 are implemented.

29. A readable storage medium storing a program or instruction, wherein the program or instruction, when executed by a processor, implements the random access method as described in any one of claims 1 to 14, or implements the steps of the communication method as described in any one of claims 15 to 21.

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