Random access method, communication method, apparatus, and device

Abstract

The present application relates to the technical field of communications, and discloses a random access method, a communication method, an apparatus, and a device. The random access method disclosed by 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, wherein the second access object group comprises one or more second access objects different from the first access object; and on the basis of the first information and a first rule, the terminal selects from the first access object and the second access object group a target access object on which a first operation is to be performed, wherein the first operation comprises camping or random access, and the access object comprises one of a carrier, a cell, and a bandwidth part (BWP).

Description

Random access, communication method, device and equipment

[0001] Cross-references

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on December 19, 2023, with application number 202311764474.9 and application name “Random access, communication methods, devices and equipment”. The entire contents of the application are incorporated by reference into this application. 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] To enhance network capacity, the network introduces multiple access objects, such as multi-carriers or multi-cells. A user equipment (UE) can randomly access one of these access objects. Taking multi-carriers or multi-cells as an example, if a UE wants to randomly access a carrier / cell, it must first obtain the synchronization signal or physical broadcast channel block (SSB) sent by that carrier / cell to achieve time-frequency synchronization. If the UE wants to initiate random access on a carrier / cell, it must first obtain the system information block 1 (SIB) for that carrier / cell, as SIB1 contains the RACH configuration.

[0005] To reduce energy consumption on the network side, a carrier / cell may not send SSB / SIB or monitor RACH. However, if a carrier / cell does not send SSB and no carrier / cell is configured for synchronization reference, the carrier / cell will not allow UEs to perform random access. If a carrier / cell does not send SIB and the UE does not obtain the SIB for the carrier from other carriers / cells, since the UE cannot obtain the RACH configuration on the carrier / cell, it can only gather on the carrier / cell with RACH configuration for random access, which will cause the load on the carrier / cell that allows random access to be too high. If a carrier / cell does not monitor RACH, UEs in idle state will also not be able to perform random access on the carrier / cell, which will lead to a reduction in network capacity.

[0006] Therefore, in a multi-access object scenario, how to implement random access of UEs to maximize network capacity while saving energy for network-side devices 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 network energy saving while ensuring network capacity.

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

[0009] receiving 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;

[0010] According to the first information and the first rule, a target access object for performing a first operation is selected from the first access object and the second access object group, 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] First information about a second access object group is sent 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 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.

[0013] According to a third aspect, a random access device is provided, the device 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;

[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 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; 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 based on the first information and a 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.

[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 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.

[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 random access 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 terminal can select the target access object to be resident or randomly accessed from the first access object and the second access object group according to the first information and the first rule. The second access object does not need 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 diagram of a 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 a random access process according to an embodiment of the present application;

[0033] FIG7 is a schematic diagram of a random access process provided by another embodiment of the present application;

[0034] FIG8 is a flow chart of a communication method provided in an embodiment of the present application;

[0035] FIG9 is a schematic structural diagram of a random access device provided by an embodiment of the present application;

[0036] FIG10 is a schematic structural diagram of a random access device provided by another embodiment of the present application;

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

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

[0039] FIG13 is a schematic structural diagram of a communication device provided in one embodiment of the present application;

[0040] FIG14 is a schematic structural diagram of a communication device of the present application;

[0041] FIG15 is a schematic diagram of the hardware structure of a terminal according to an embodiment of the present application;

[0042] FIG16 is a schematic diagram of the hardware structure of the network side device in an embodiment of the present application. DETAILED DESCRIPTION

[0043] 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.

[0044] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that 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 object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0045] 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.

[0046] 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 relevant 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.

[0047] 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.

[0048] First, a random access method proposed in an embodiment of the present application is described.

[0049] As shown in FIG2 , a random access method proposed in an embodiment of the present application may include:

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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).

[0054] 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).

[0055] A random access method provided in an embodiment of the present application is applicable to a scenario in which a network-side device does not configure the system information SIB of a second access object on a first access object or only configures a portion of the SIB (i.e., the first information does not include the system information SIB of the second access object or only includes a portion of the SIB of the second access object). These scenarios may include:

[0056] Scenario 1: The first access object is configured with wake-up signal (WUS) configuration information that triggers each second access object in the second access object group to send SIB. All second access objects in the second access object group send SSB and perform normal RACH monitoring, but do not send SIB1 (the sending of SIB1 requires WUS triggering).

[0057] Scenario 2: The first access object is configured with WUS configuration information that triggers each second access object in the second access object group to send SIB. All second access objects in the second access object group do not send SSB, and take the first access object as the reference access object. They all perform normal RACH monitoring and do not send SIB1 (the sending of SIB1 requires WUS triggering).

[0058] Scenario 3: The first access object is configured with WUS configuration information that triggers the second access object group to send SSB and SIB1. All second access objects in the second access object group do not send SSB, all perform normal RACH monitoring, and do not send SIB1 (the sending of SIB1 requires WUS triggering).

[0059] Scenario 4: The first access object is configured with WUS configuration information that triggers the second access object group to send SIB1 and perform RACH monitoring. All second access objects in the second access object group send SSB, or do not send SSB (with the first access object as the reference access object), do not perform normal RACH monitoring, and do not send SIB1 (the sending of SIB1 requires WUS triggering).

[0060] Scenario 5: The first access object is configured with a WUS configuration that triggers the second access object group to send SSB and SIB1 and perform RACH monitoring. All second access objects in the second access object group do not send SSB, do not perform normal RACH monitoring, and do not send SIB1 (the sending of SIB1 requires WUS triggering).

[0061] 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.

[0062] The first information corresponds to at least one second access object in the second access object group, and the first information may include at least one of the following:

[0063] 1) triggering the at least one second access object to send a wake-up signal WUS configuration information of an SSB, or triggering the at least one second access object to adapt to the SSB WUS configuration information, wherein the SSB includes at least one of a synchronization signal block and a physical broadcast channel block;

[0064] 2) triggering the at least one second access object to send WUS configuration information of the SIB, or triggering the WUS configuration information of the SIB adaptive adjustment of the at least one second access object;

[0065] 3) 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;

[0066] 4) The configuration information related to the SSB currently being sent by the at least one second access object may include at least one of the following:

[0067] whether the at least one second access object is sending an SSB;

[0068] 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;

[0069] 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.

[0070] 5) The configuration information related to the SIB currently being sent by the at least one second access object may include at least one of the following:

[0071] whether the at least one second access object sends an SIB;

[0072] a sending period of the SIB being sent by the at least one second access object;

[0073] Configuration information of at least one of a physical downlink control channel PDCCH and a control resource set associated with the SIB being sent by the at least one second access object;

[0074] The transmission mode of the SIB being sent by the at least one second access object, the transmission mode including one of a normal transmission mode, an energy-saving transmission mode, a compact transmission mode, a long-cycle transmission mode (SIB transmission cycle is long), and an on-demand transmission mode. Among them, 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 aggregated transmission mode can be a transmission mode in which there is no time domain gap (gap) between multiple SIB1s.

[0075] 6) The configuration information related to the RACH monitoring behavior currently in which the at least one second access object is located may include at least one of the following:

[0076] whether the at least one second access object performs RACH monitoring;

[0077] 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;

[0078] 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).

[0079] 7) The SSB configuration information sent by the WUS after successful triggering may include at least one of the following:

[0080] 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;

[0081] 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;

[0082] 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;

[0083] 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;

[0084] 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;

[0085] After the WUS is successfully triggered, the time domain resource position of the first SSB or the first SIB 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;

[0086] 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.

[0087] 8) The SIB configuration information sent by the WUS after successful triggering may include at least one of the following:

[0088] After the WUS is successfully triggered, the at least one second object sends the transmission period of the SIB, and configuration information of at least one of the physical downlink control channel (PDCCH) and the control resource set (CORESET) that carries the scheduling information of the SIB;

[0089] After the WUS is successfully triggered, the at least one second object sends a listening window for the SIB, that is, the UE listens to the SIB within the listening window;

[0090] After the WUS is successfully triggered, the at least one second object sends one of the transmission time length, number of transmissions, and number of transmission cycles of the SIB, such as one of the transmission time length, number of transmissions, and number of transmission cycles of SIB1;

[0091] After the WUS is successfully triggered, the at least one second object sends the frequency domain resource information of the SIB, where the frequency domain resource information includes at least one of the starting position of the frequency domain resource (for example, the carrier, BWP, or the position of the frequency band), the number of frequency bands occupied by the frequency domain resource, and the bandwidth size of the signal;

[0092] After the WUS is successfully triggered, the at least one second object sends time domain resource information of the SIB, where the time domain resource information includes at least one of a time domain resource position (for example, an offset relative to a synchronization / broadcast channel), a listening window size, a listening window period, a number of time domain repetition transmissions, and a time domain repetition transmission mode;

[0093] After the WUS is successfully triggered, the at least one second object sends a transmission mode of the SIB, where the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, an aggregated transmission mode, a long-cycle transmission mode, and an on-demand transmission mode. The energy-saving transmission mode may be a simplified transmission mode that only sends core configuration information such as RACH, and the aggregated transmission mode may be a transmission mode in which there is no time domain gap between multiple SIB1s.

[0094] 9) Configuration information related to RACH monitoring after successful WUS triggering may include:

[0095] 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.

[0096] 10) The characteristic information of the at least one second access object may include at least one of the following:

[0097] identification information of the at least one second access object;

[0098] whether the at least one second access object can use the first access object as a reference access object;

[0099] whether the at least one second access object is co-located with the first access object;

[0100] whether the at least one second access object and the first access object are in the same timing advance group (TAG);

[0101] whether the at least one second access object has a Quasi Co-Location (QCL) relationship with the first access object;

[0102] a reference access object of the at least one second access object;

[0103] an access object co-located with the at least one second access object;

[0104] an access object that is located in the same TAG as the at least one second access object;

[0105] an access object having a QCL relationship with the at least one second access object;

[0106] Whether the at least one second access object is in a prohibited Bar state;

[0107] The priority of the at least one second access object when the UE performs random access channel selection;

[0108] 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;

[0109] 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;

[0110] whether the at least one second access object supports UE residency;

[0111] Whether the at least one second access object is a suitable cell;

[0112] whether the at least one second access object supports cell selection and / or cell reselection;

[0113] Partial system information of the at least one second access object, the partial system information including: Public Land Mobile Network (PLMN) information, relevant configuration information of cell selection criteria, relevant configuration information of cell reselection criteria and at least one item of cell barring (Cell Bar) information.

[0114] The WUS configuration information included in the first information may include at least one of the following:

[0115] 1) The synchronization reference configuration information of the WUS may include at least one of the following:

[0116] 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;

[0117] GPS timing.

[0118] 2) WUS resource configuration information may include at least one of the following:

[0119] Time domain resource information;

[0120] Frequency domain resource information;

[0121] The signal sequence configuration information, for example, a preamble group, may indicate a preamble group index, indicating that the group of preambles is used to trigger the SSB of the at least one second access object.

[0122] 3) The power configuration information of the WUS may include at least one of the following:

[0123] Initial signal power;

[0124] Signal power ramp-up step size.

[0125] 4) The WUS retransmission configuration information may include at least one of the following:

[0126] The number of repetitions of a single signal transmission;

[0127] The maximum number of repetitions sent by the channel.

[0128] 5) WUS airspace parameter configuration information may include at least one of the following:

[0129] A correspondence between the WUS and the SSB of the first access object;

[0130] a correspondence between the WUS and the SSB of the at least one second access object;

[0131] The correspondence between WUS and the SSB of the second access object group.

[0132] 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.

[0133] The form of the WUS signal includes at least one of the following:

[0134] RACH;

[0135] Msg1;

[0136] Preamble sequence;

[0137] Sounding Reference Signal (SRS);

[0138] Physical Uplink Control Channel (PUCCH).

[0139] The configuration method of the WUS resource configuration information includes at least one of the following:

[0140] 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;

[0141] 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;

[0142] 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;

[0143] One or more signal resources are configured for the second access object or the second access object group in the first information.

[0144] The signal resources configured by the WUS resource configuration information include at least one of the following:

[0145] 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;

[0146] 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 / SIB 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;

[0147] 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 / SIB transmission and / or RACH monitoring.

[0148] The grouping method of the second access object group includes at least one of the following:

[0149] Configured by network-side devices;

[0150] As stipulated by the agreement.

[0151] The grouping rule of the second access object group includes at least one of the following:

[0152] The second access objects in the same frequency band are grouped together;

[0153] The second access objects in the same frequency band interval are grouped together;

[0154] The second access objects having at least one of the same initial BWP, active BWP, SSB, and SCS are grouped together;

[0155] 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;

[0156] The second access object of the co-location is a group;

[0157] The second access objects with the same SSB sending period are grouped together.

[0158] Step 202: According to the first information and the first rule, select a target access object for performing a first operation from the first access object and the second access object group, 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.

[0159] The first rule may be related to at least one of the following:

[0160] One or more access objects that the terminal can randomly access, as indicated or configured by the network-side device;

[0161] The access object to be randomly accessed by the terminal is defaulted to be the first access object;

[0162] Bar status information of the second access object;

[0163] an index value of the second access object;

[0164] a center frequency of the second access object;

[0165] a subcarrier spacing (SCS) of the second access object;

[0166] an identifier of the second access object;

[0167] a frequency interval between the second access object and the first access object;

[0168] Whether the second access object performs normal RACH monitoring;

[0169] Whether the second access object sends SSB normally;

[0170] Whether the second access object sends the SIB normally;

[0171] Whether the second access object satisfies at least two of normal RACH monitoring, normal SSB transmission, and normal SIB transmission;

[0172] The number of times a WUS needs to be sent to the second access object;

[0173] the priority of the second access object;

[0174] 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);

[0175] Randomly generated access object index;

[0176] a weight value of the second access object;

[0177] Randomly generated access object weight value;

[0178] whether the first access object is a suitable cell;

[0179] Whether the second access object is a suitable cell.

[0180] 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:

[0181] 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:

[0182] The priority of the second access object that normally sends SSBs is greater than the priority of the second access object that uses the first access object as a reference and does not send SSBs. The priority of the second access object that sends SSBs on demand is greater than the priority of the second access object that normally sends SSBs.

[0183] The priority of the second access object for sending SIB normally is greater than the priority of the second access object for sending SIB on demand;

[0184] The priority of the second access object that monitors the RACH normally is greater than the priority of the second access object that monitors the RACH on demand.

[0185] ② The frequency band interval between the second access object and the first access object;

[0186] ③The number of the second access object.

[0187] 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 following embodiments and will not be described in detail here. See below for details.

[0188] First example

[0189] 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:

[0190] Determining whether the first access object is a suitable cell;

[0191] If the first access object is a suitable cell, selecting the first access object as a target access object;

[0192] In a case where the first access object is not a suitable cell, one of the first step, the second step and the third step is performed.

[0193] Wherein, the first step includes:

[0194] determining, according to a reference signal measurement result corresponding to at least one second access object in the second access object group and a system information SIB sent by the at least one second access object triggered by the WUS, whether the at least one second access object is a suitable cell;

[0195] 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.

[0196] Wherein, the second step includes:

[0197] determining, according to a reference signal measurement result corresponding to at least one second access object in the second access object group and a portion of the SIB 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;

[0198] In the 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 the first rule, and in the case where the terminal fails to obtain the SIB of the suitable cell, a WUS that triggers the sending of the SIB is sent to the suitable cell, and after receiving the SIB, the suitable cell is used as the target access object for performing the first operation.

[0199] Wherein, the third step includes:

[0200] The second access object is ignored, and other suitable cells are searched as target access objects for performing operations.

[0201] Furthermore, searching for another suitable cell as a target access object for performing the first operation may include:

[0202] Searching for a suitable cell as a target access object for performing an operation from one or more second access objects in the second access object group;

[0203] searching, from one or more third access objects in a third access object group, for a suitable cell as a target access object for which the operation is to be performed, wherein the third access object group includes access objects that meet a third condition;

[0204] The third condition includes at least one of the following:

[0205] Taking the first access object as a reference;

[0206] co-located with the first access object;

[0207] A continuous access object belonging to the same frequency band as the first access object.

[0208] Second example

[0209] 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: executing the fourth step or the fifth step.

[0210] Wherein, the fourth step includes:

[0211] determining, according to a reference signal measurement result of the first access object and a system information SIB of the first access object, whether the first access object is a suitable cell;

[0212] determining, according to a reference signal measurement result of at least one second access object in the second access object group and a portion of the SIB 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;

[0213] When the first access object is a suitable cell and one or more second access objects among the at least one second access object are suitable cells, selecting a suitable cell from the first access object and the at least one second access object according to a first rule;

[0214] If the suitable cell is the first access object, taking the suitable cell as the target access object for performing the first operation;

[0215] If the suitable cell is the second access object, a WUS that triggers the sending of the SIB is sent to the suitable cell, and after receiving the SIB, the suitable cell is used as the target access object for performing the first operation.

[0216] Wherein, the fifth step includes:

[0217] determining, according to a reference signal measurement result of the first access object and a SIB of the first access object, whether the first access object is a suitable cell;

[0218] determining, according to a reference signal measurement result of at least one second access object in the second access object group and a SIB sent by the at least one second access object triggered by the WUS, whether the at least one second access object is a suitable cell;

[0219] 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.

[0220] 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.

[0221] 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, 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 send SSB, SIB and other information all the time, but sends SSB / SIB 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 to the greatest extent possible.

[0222] Optionally, when 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 SSB / SIB, or triggering the WUS configuration information for SSB / SIB 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 triggering the WUS configuration information for RACH monitoring adaptive adjustment of the at least one second access object, 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:

[0223] In 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 an SSB, a SIB, and monitor a RACH.

[0224] 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.

[0225] The first condition may include at least one of the following:

[0226] 1) The first access object is not a suitable cell;

[0227] 2) The target access object is a suitable cell;

[0228] 3) performing intra-frequency or inter-frequency measurement on the target access object;

[0229] 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;

[0230] 5) The terminal is sensitive to access delay;

[0231] 6) The terminal is in the process of recovering from link failure.

[0232] In another example, before sending the WUS for the target access object, the method may further include: the terminal assuming that the target access object is in a second energy-saving state.

[0233] The second energy-saving state may include at least one of the following:

[0234] Do not send SIB, send SSB normally, and perform normal RACH monitoring;

[0235] 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;

[0236] Do not send SIB, send SSB normally, and do not perform normal RACH monitoring;

[0237] Do not send SIB, do not send SSB, or send energy-saving SSB (such as simplified SSB or sparse SSB), and do not perform normal RACH monitoring;

[0238] Send SIB, send SSB normally, and do not perform normal RACH monitoring;

[0239] Send SIB, do not send SSB or send energy-saving SSB, and do not perform normal RACH monitoring;

[0240] Send SIB, send SSB normally, and perform normal RACH monitoring;

[0241] Send SIB, do not send SSB or send energy-saving SSB, and perform normal RACH monitoring;

[0242] Among them, the energy-saving SSB includes one of lightweight SSB, simplified SSB, sparse SSB and long-cycle SSB.

[0243] 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 / or send SIB, and the other is to trigger the target access object to monitor RACH.

[0244] 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 / or send SIB; 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.

[0245] Exemplarily, the terminal sending the second WUS for the target access object (the time point of sending the second WUS) includes the following:

[0246] Z time slots / symbols / milliseconds after sending the first WUS, the terminal starts sending a second WUS for the target access object;

[0247] X time slots / symbols / milliseconds after receiving feedback on the first WUS, the terminal starts sending a second WUS for the target access object;

[0248] After receiving the first SSB or the first SIB 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;

[0249] 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;

[0250] 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.

[0251] The embodiment shown in Figure 3 provides a random access method that can trigger the second access object to send SSB / SIB or perform RACH monitoring on demand (on-demand), instead of continuously sending SSB / SIB or continuously performing RACH monitoring, and also instead of not sending SSB / SIB 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.

[0252] Optionally, when the WUS is used to trigger SSB / SIB transmission, as shown in FIG4 , a random access method provided in an embodiment of the present application may further include:

[0253] The terminal monitors the SSB / SIB sent by the target access object.

[0254] It should be noted that regardless of whether the UE sends one WUS or two WUSs (the first WUS and the second WUS) for the target access object, the UE may monitor the position of the SSB / SIB. In an exemplary embodiment, when the UE sends one WUS for the target access object, the UE monitors the position of the SSB / SIB after sending the WUS; when the UE sends two WUSs (the first WUS and the second WUS) for the target access object, the UE may monitor the position of the SSB / SIB after sending the first WUS.

[0255] In an exemplary embodiment, monitoring, by the terminal, the SSB sent by the target access object (a time point of monitoring the SSB sent by the target access object) may include one of the following:

[0256] After sending the WUS, starting a third timer, after the third timer times out, the terminal starts to monitor the SSB / SIB sent by the target access object;

[0257] C time slots / symbols / milliseconds after sending the WUS, the terminal starts to monitor the SSB / SIB sent by the target access object;

[0258] In the next time slot after sending the WUS, the terminal starts to monitor the SSB / SIB sent by the target access object;

[0259] Within the SSB listening window configured in the first information, the terminal listens to the SSB / SIB sent by the target access object.

[0260] The embodiment shown in FIG4 provides a random access method 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.

[0261] Optionally, as shown in FIG5 , a random access method provided in an embodiment of the present application may further include:

[0262] Step 205: The terminal initiates the first operation to the target access object.

[0263] When 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; when 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. In an exemplary embodiment, 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 include one of the following:

[0264] 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);

[0265] 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);

[0266] 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).

[0267] Optionally, a random access method provided in an embodiment of the present application may further include:

[0268] When the second condition is met, the terminal sends the WUS to the target access object again.

[0269] The second condition may include but is not limited to at least one of the following:

[0270] 1)SSB detection failed;

[0271] 2) The number of random accesses reaches the maximum value;

[0272] The number of WUS transmissions is less than or equal to the preset maximum number of transmissions;

[0273] 3) No feedback was received for the previous WUS;

[0274] 4) The previous WUS is used to trigger the sending of SSB / SIB. After receiving feedback on the previous WUS signal, another WUS is sent to trigger RACH monitoring (that is, the WUS is sent again to trigger RACH monitoring);

[0275] 5) No feedback for the previous WUS is received before the timer expires.

[0276] Optionally, the resent WUS signal has at least one of the following characteristics:

[0277] 1) Signal power increases;

[0278] 2) The time interval between the sending of the last WUS is greater than the preset time interval;

[0279] 3) Frequency domain resources and sequence resources are the same as those of the previous WUS.

[0280] 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.

[0281] It should also be noted that SIB1 and SIB involved in the embodiments of the present application both refer to system information blocks, and SIB1 is an example of SIB.

[0282] The following describes an application of a random access method provided in an embodiment of the present application in conjunction with an exemplary embodiment.

[0283] Example 1

[0284] Assume that the terminal is operating on the first carrier Cell 0 and obtains first information about the second carriers Cell 1 , Cell 2 , and Cell 3 .

[0285] In the scenario 1 mentioned above (the second carrier normally transmits SSBs and performs normal RACH monitoring, but does not normally transmit SIB1), the first carrier is configured with WUS configuration information that triggers each second carrier in the second carrier group to transmit SIBs. All second carriers in the second carrier group normally transmit SSBs and perform normal RACH monitoring, but do not normally transmit SIB1. In an exemplary embodiment:

[0286] Cell 0: Belongs to band 0, sends SSB and SIB1 normally, and is configured with WUS configuration information that triggers Cell 1, Cell 2, and Cell 3 to send SIB1;

[0287] Cell 1: Belongs to Band 1, sends SSB normally, monitors RACH normally, and does not send SIB1;

[0288] Cell 2: Belongs to Band 2, sends SSB normally, monitors RACH normally, and does not send SIB1;

[0289] Cell 3: Belongs to Band 3, sends SSB normally, performs normal RACH monitoring, and does not send SIB1.

[0290] In some embodiments, the first information about the second carrier group sent by the network-side device through the first carrier may include at least one of the following:

[0291] 1) triggering at least one second carrier to send SIB or perform WUS configuration information for SIB adaptation adjustment;

[0292] 2) Configuration information related to the SSB currently being transmitted by at least one second carrier may include at least one of the following:

[0293] whether at least one second carrier is transmitting SSB;

[0294] At least one of a frequency of an SSB being transmitted by at least one second carrier, an SSB transmission period, and the number of SSBs in a transmission period;

[0295] The transmission mode of the SSB being transmitted by at least one second carrier, the transmission mode including 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 transmits 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.

[0296] 3) The SIB configuration information sent by the WUS after successful triggering may include at least one of the following:

[0297] After the WUS is successfully triggered, the at least one second object sends the transmission period of the SIB, and configuration information of at least one of the physical downlink control channel (PDCCH) and the control resource set (CORESET) that carries the scheduling information of the SIB;

[0298] After the WUS is successfully triggered, the at least one second object sends a listening window for the SIB, that is, the UE listens to the SIB within the listening window;

[0299] After the WUS is successfully triggered, the at least one second object sends one of the transmission time length, number of transmissions, and number of transmission cycles of the SIB, such as one of the transmission time length, number of transmissions, and number of transmission cycles of SIB1;

[0300] After the WUS is successfully triggered, the at least one second object sends the frequency domain resource information of the SIB, where the frequency domain resource information includes at least one of the starting position of the frequency domain resource (for example, the carrier, BWP, or the position of the frequency band), the number of frequency bands occupied by the frequency domain resource, and the bandwidth size of the signal;

[0301] After the WUS is successfully triggered, the at least one second object sends time domain resource information of the SIB, where the time domain resource information includes at least one of a time domain resource position (for example, an offset relative to a synchronization / broadcast channel), a listening window size, a listening window period, a number of time domain repetition transmissions, and a time domain repetition transmission mode;

[0302] After the WUS is successfully triggered, the at least one second object sends a transmission mode of the SIB, where the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, an aggregated transmission mode, a long-cycle transmission mode, and an on-demand transmission mode. The energy-saving transmission mode may be a simplified transmission mode that only sends core configuration information such as RACH, and the aggregated transmission mode may be a transmission mode in which there is no time domain gap between multiple SIB1s.

[0303] 4) The characteristic information of the at least one second carrier itself may include at least one of the following:

[0304] whether at least one second carrier is in a barred (Bar) state;

[0305] a priority of at least one second carrier when the UE performs random access channel selection;

[0306] 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;

[0307] A characteristic value N of the UE ID for which random access is permitted on at least one second carrier, for example, a UE with UE ID mod number of carriers = N can perform random access on the carrier;

[0308] whether the at least one second carrier supports UE camping;

[0309] Whether the at least one second carrier is a suitable cell;

[0310] whether the at least one second carrier supports cell selection and / or cell reselection;

[0311] Partial system information of at least one second carrier, the partial system information comprising: at least one of: public land mobile network (PLMN) information, relevant configuration information of cell selection criteria, relevant configuration information of cell reselection criteria, and cell barring (Cell Bar) information.

[0312] 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.

[0313] 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;

[0314] If the first carrier is determined not to be a suitable cell, performing at least one of the following:

[0315] ■ Send WUS first and determine based on the triggered SIB1 and SSB measurement results: The UE selects one or more carriers in the second carrier group according to the first rule to send the corresponding WUS and receive SIB1, and determines whether the one or more carriers are suitable cells based on the SSB measurement results and SIB1 information;

[0316] ◆If at least one carrier is a suitable cell, the UE selects one of the carriers for monitor paging according to the first rule.

[0317] ■Judge based on partial SIB1 information and SSB measurement results, and then send WUS after the judgment: The UE selects one or more carriers in the second carrier group as the target cell according to the first rule, and judges 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.

[0318] ◆If at least one carrier is a suitable cell, the UE selects one of the carriers according to the first rule and sends a WUS to it, obtains SIB1 and then resides on the carrier (monitor paging).

[0319] ■The UE ignores the second carrier group and seeks other suitable cells.

[0320] 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).

[0321] Optionally, in some embodiments, the UE performs at least one of the following to determine a target carrier for performing the first operation:

[0322] ■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, 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, sends the corresponding WUS and receives SIB1, and determines whether the one or more second carriers are suitable cells based on the SSB measurement result and SIB1;

[0323] ◆If at least one carrier is a suitable cell, the UE selects one of the carriers for monitor paging according to the first rule.

[0324] ■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 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 result.

[0325] ◆If at least one carrier is a suitable cell, the UE selects one of the carriers according to the first rule: if the carrier is the first carrier, it directly resides on the first carrier; if the carrier is a carrier of the second carrier group, it sends a WUS to it, obtains SIB1, and then resides on the carrier (monitor paging).

[0326] 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. If a second carrier in the second carrier group is determined to be a highest ranked cell or a target cell for cell reselection, the UE performs at least one of the following to determine a target carrier for performing the first operation:

[0327] ■ Sending a WUS to the second carrier to trigger the second carrier to send SIB1. After obtaining SIB1, the UE determines whether the cell is a suitable cell;

[0328] If it is a suitable cell, the UE performs cell reselection and camps on the cell;

[0329] ■ Determine whether the cell is a suitable cell. If it is a suitable cell, send a WUS to obtain SIB1, then perform cell reselection and stay in the cell.

[0330] 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.

[0331] 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:

[0332] 1) If the selected target carrier is the first carrier, RACH is directly initiated for random access;

[0333] 2) If the selected target carrier is a carrier of the second carrier group, a WUS is first sent to the carrier to obtain SIB 1, and then a RACH is initiated on the carrier for random access according to the configuration information of the SIB1.

[0334] 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:

[0335] The target carrier is not in the bar state for the UE;

[0336] The RSRP / RSRQ measured on the target carrier meets certain conditions, such as being greater than or equal to a threshold;

[0337] The target carrier is a suitable cell for the UE.

[0338] 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:

[0339] Randomly select the target carrier;

[0340] 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;

[0341] The network side indicates / configures the target carrier for the UE to perform random access;

[0342] Selecting the carrier with the largest or smallest carrier index as the target carrier;

[0343] Select the carrier with the largest, smallest or middle center frequency as the target carrier;

[0344] Select the carrier with the largest or smallest SCS as the target carrier;

[0345] Selecting a second carrier with the smallest frequency interval from the first carrier as the target carrier;

[0346] Select the carrier that needs to send the least number of WUS as the target carrier;

[0347] Select the carrier with the highest priority as the target carrier;

[0348] The carrier with the largest RSRP / SINR measurement value of the reference signal is selected as the target carrier.

[0349] In the aforementioned scenario 2 (the second carrier does not send an SSB (with a reference carrier), performs normal RACH monitoring, and does not normally send SIB1), the first carrier is configured with WUS configuration information that triggers each second carrier in the second carrier group to send an SIB. At least one second carrier in the second carrier group does not send an SSB, performs normal RACH monitoring, but does not normally send SIB1. In an exemplary embodiment:

[0350] Cell 0: Belongs to band 0, sends SSBs normally, and is configured with WUS configuration information that triggers Cell 1, Cell 2, and Cell 3 to send SIBs;

[0351] Cell 1: belongs to Band 1, does not send SSB (with the first carrier as the reference), and performs normal RACH monitoring without sending SIB1;

[0352] Cell 2: Belongs to Band 2, sends SSB normally, monitors RACH normally, and does not send SIB1;

[0353] Cell 3: Belongs to Band 3, does not send SSB (with Cell 2 as a reference), and performs normal RACH monitoring without sending SIB1.

[0354] In some embodiments, the first information about the second carrier group sent by the network-side device through the first carrier may include at least one of the following:

[0355] 1) triggering at least one second carrier to send SIB or perform WUS configuration information for SIB adaptation adjustment;

[0356] 2) Configuration information related to the SSB currently being transmitted by at least one second carrier may include at least one of the following:

[0357] whether at least one second carrier is transmitting SSB;

[0358] At least one of a frequency of an SSB being transmitted by at least one second carrier, an SSB transmission period, and the number of SSBs in a transmission period;

[0359] The transmission mode of the SSB being transmitted by at least one second carrier, the transmission mode including 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 transmits 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.

[0360] 3) The SIB configuration information sent by the WUS after successful triggering may include at least one of the following:

[0361] After the WUS is successfully triggered, the at least one second object sends the transmission period of the SIB, and configuration information of at least one of the physical downlink control channel (PDCCH) and the control resource set (CORESET) that carries the scheduling information of the SIB;

[0362] After the WUS is successfully triggered, the at least one second object sends a listening window for the SIB, that is, the UE listens to the SIB within the listening window;

[0363] After the WUS is successfully triggered, the at least one second object sends one of the transmission time length, number of transmissions, and number of transmission cycles of the SIB, such as one of the transmission time length, number of transmissions, and number of transmission cycles of SIB1;

[0364] After the WUS is successfully triggered, the at least one second object sends the frequency domain resource information of the SIB, where the frequency domain resource information includes at least one of the starting position of the frequency domain resource (for example, the carrier, BWP, or the position of the frequency band), the number of frequency bands occupied by the frequency domain resource, and the bandwidth size of the signal;

[0365] After the WUS is successfully triggered, the at least one second object sends time domain resource information of the SIB, where the time domain resource information includes at least one of a time domain resource position (for example, an offset relative to a synchronization / broadcast channel), a listening window size, a listening window period, a number of time domain repetition transmissions, and a time domain repetition transmission mode;

[0366] After the WUS is successfully triggered, the at least one second object sends a transmission mode of the SIB, where the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, an aggregated transmission mode, a long-cycle transmission mode, and an on-demand transmission mode. The energy-saving transmission mode may be a simplified transmission mode that only sends core configuration information such as RACH, and the aggregated transmission mode may be a transmission mode in which there is no time domain gap between multiple SIB1s.

[0367] 4) The characteristic information of the at least one second carrier itself may include at least one of the following:

[0368] whether at least one second carrier is in a barred (Bar) state;

[0369] a priority of at least one second carrier when the UE performs random access channel selection;

[0370] 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;

[0371] A characteristic value N of the UE ID for which random access is permitted on at least one second carrier, for example, a UE with UE ID mod number of carriers = N can perform random access on the carrier;

[0372] whether the at least one second carrier supports UE camping;

[0373] Whether the at least one second carrier is a suitable cell;

[0374] whether the at least one second carrier supports cell selection and / or cell reselection;

[0375] Partial system information of at least one second carrier, the partial system information comprising: 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;

[0376] whether at least one second carrier can use the first carrier as a reference carrier;

[0377] whether at least one second carrier is co-located with the first carrier;

[0378] whether the at least one second carrier is in the same timing advance group (TAG) as the first carrier;

[0379] whether at least one second carrier has a quasi co-location (QCL) relationship with the first carrier;

[0380] at least one reference carrier for a second carrier;

[0381] a carrier co-located with at least one second carrier;

[0382] a carrier in the same TAG as the at least one second carrier;

[0383] A carrier having a QCL relationship with at least one second carrier.

[0384] 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, the first information 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.

[0385] 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 selects the first carrier for monitoring (monitor paging), or selects a carrier from the first carrier and / or the third carrier group according to the first rule for monitoring (monitor paging), wherein:

[0386] ■ 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.

[0387] If the first carrier is determined not to be a suitable cell, perform at least one of the following:

[0388] ■The UE selects one or more carriers in the second carrier group according to the first rule to send the corresponding WUS and receive SIB1, and determines whether the one or more carriers are suitable cells based on the SSB measurement result and SIB1 information;

[0389] ◆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.

[0390] ■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.

[0391] ◆If at least one second carrier is a suitable cell, the UE selects one of the second carriers according to the first rule and sends a WUS to it, obtains SIB1 and then resides on the carrier (monitor paging).

[0392] ■The UE ignores the second carrier group and seeks other suitable cells.

[0393] Optionally, in some embodiments, the UE performs one of the following to determine a target carrier for performing the first operation:

[0394] ■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 sends the corresponding WUS and receives the SIB1, and determines whether the one or more carriers are suitable cells based on the SSB measurement result and the SIB1;

[0395] ◆If at least one carrier is a suitable cell, the UE selects one of the carriers for monitor paging according to the first rule.

[0396] ■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.

[0397] ◆If at least one carrier is a suitable cell, the UE selects one of the carriers according to the first rule: if the carrier is the first carrier, it directly resides on the first carrier; if the carrier is a carrier of the second carrier group, it first sends a WUS to the carrier, obtains SIB1, and then resides on the carrier (monitor paging).

[0398] 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).

[0399] 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.

[0400] 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:

[0401] 1) If the selected target carrier is the first carrier, RACH is directly initiated for random access;

[0402] 2) If the selected target carrier is a carrier of the second carrier group, a WUS is first sent to the carrier to obtain SIB 1, and then a RACH is initiated on the carrier for random access according to the configuration information of the SIB1.

[0403] 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:

[0404] The target carrier is not in the bar state for the UE;

[0405] The RSRP / RSRQ measured on the target carrier meets certain conditions, such as being greater than or equal to a threshold;

[0406] The target carrier is a suitable cell for the UE.

[0407] 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:

[0408] Randomly select the target carrier;

[0409] 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;

[0410] The network side indicates / configures the target carrier for the UE to perform random access;

[0411] Selecting the carrier with the largest or smallest carrier index as the target carrier;

[0412] Select the carrier with the largest, smallest or middle center frequency as the target carrier;

[0413] Select the carrier with the largest or smallest SCS as the target carrier;

[0414] Selecting a second carrier with the smallest frequency interval from the first carrier as the target carrier;

[0415] Select the carrier that needs to send the least number of WUS as the target carrier;

[0416] Select the carrier with the highest priority as the target carrier;

[0417] The carrier with the largest RSRP / SINR measurement value of the reference signal is selected as the target carrier.

[0418] In the scenario 3 mentioned above (the second carrier does not send SSB and SIB1 and performs normal RACH monitoring), the first carrier is configured with WUS configuration information that triggers each second carrier in the second carrier group to send SSB and SIB. At least one second carrier in the second carrier group does not send SSB or sends sparse SSB. It is necessary to use WUS to trigger SSB transmission and perform normal RACH monitoring. In an exemplary embodiment:

[0419] Cell 0: Belongs to band 0, sends SSB normally, and is configured with WUS configuration information that triggers Cell 1, Cell 2, and Cell 3 to send SIB1 and SSB;

[0420] Cell 1: Belongs to Band 1, does not send SSB, performs normal RACH monitoring, and does not send SIB1;

[0421] Cell 2: Belongs to Band 2, sends SSB normally, monitors RACH normally, and does not send SIB1;

[0422] Cell 3: Belongs to Band 3, sends sparse SSBs, performs normal RACH monitoring, and does not send SIB1.

[0423] In some embodiments, the first information about the second carrier group (e.g., Cell1, Cell2, and Cell3) sent by the network-side device through the first carrier may include at least one of the following:

[0424] 1) triggering at least one second carrier to send SIB or perform WUS configuration information for SIB adaptation adjustment;

[0425] 2) WUS configuration information for triggering at least one second carrier to send SSB or perform SSB adaptive adjustment;

[0426] 3) Configuration information related to the SSB currently being transmitted by at least one second carrier may include at least one of the following:

[0427] whether at least one second carrier is transmitting SSB;

[0428] At least one of a frequency of an SSB being transmitted by at least one second carrier, an SSB transmission period, and the number of SSBs in a transmission period;

[0429] The transmission mode of the SSB being transmitted by at least one second carrier, the transmission mode including 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 transmits 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.

[0430] 4) The SIB configuration information sent by the WUS after successful triggering may include at least one of the following:

[0431] After the WUS is successfully triggered, the at least one second object sends the transmission period of the SIB, and configuration information of at least one of the physical downlink control channel (PDCCH) and the control resource set (CORESET) that carries the scheduling information of the SIB;

[0432] After the WUS is successfully triggered, the at least one second object sends a listening window for the SIB, that is, the UE listens to the SIB within the listening window;

[0433] After the WUS is successfully triggered, the at least one second object sends one of the transmission time length, number of transmissions, and number of transmission cycles of the SIB, such as one of the transmission time length, number of transmissions, and number of transmission cycles of SIB1;

[0434] After the WUS is successfully triggered, the at least one second object sends the frequency domain resource information of the SIB, where the frequency domain resource information includes at least one of the starting position of the frequency domain resource (for example, the carrier, BWP, or the position of the frequency band), the number of frequency bands occupied by the frequency domain resource, and the bandwidth size of the signal;

[0435] After the WUS is successfully triggered, the at least one second object sends time domain resource information of the SIB, where the time domain resource information includes at least one of a time domain resource position (for example, an offset relative to a synchronization / broadcast channel), a listening window size, a listening window period, a number of time domain repetition transmissions, and a time domain repetition transmission mode;

[0436] After the WUS is successfully triggered, the at least one second object sends a transmission mode of the SIB, where the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, an aggregated transmission mode, a long-cycle transmission mode, and an on-demand transmission mode. The energy-saving transmission mode may be a simplified transmission mode that only sends core configuration information such as RACH, and the aggregated transmission mode may be a transmission mode in which there is no time domain gap between multiple SIB1s.

[0437] 5) The SSB configuration information sent after a successful WUS trigger may include at least one of the following:

[0438] 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;

[0439] 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;

[0440] 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;

[0441] 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;

[0442] 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;

[0443] After the WUS is successfully triggered, the time domain resource position of the first SSB or the first SIB 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;

[0444] 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.

[0445] 6) The characteristic information of the at least one second carrier itself may include at least one of the following:

[0446] whether at least one second carrier is in a barred (Bar) state;

[0447] a priority of at least one second carrier when the UE performs random access channel selection;

[0448] 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;

[0449] a characteristic value N of the UE ID for which random access is permitted on at least one second carrier, for example, a UE with UE ID mod number of carriers = N can perform random access on the carrier;

[0450] whether the at least one second carrier supports UE camping;

[0451] Whether the at least one second carrier is a suitable cell;

[0452] whether the at least one second carrier supports cell selection and / or cell reselection;

[0453] Partial system information of at least one second carrier, the partial system information comprising: at least one of: public land mobile network (PLMN) information, relevant configuration information of cell selection criteria, relevant configuration information of cell reselection criteria, and cell barring (Cell Bar) information.

[0454] 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.

[0455] 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 selects the first carrier for monitor paging; if the first carrier is determined not to be a suitable cell, the UE performs at least one of the following:

[0456] ■The UE selects one or more carriers in the second carrier group according to the first rule to send the corresponding WUS and receive SIB1 and / or SSB, and determines whether the one or more carriers are suitable cells based on the SSB measurement result and SIB1 information;

[0457] ◆If at least one carrier is a suitable cell, the UE selects one of the carriers for monitor paging according to the first rule.

[0458] ■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; for carriers in the second carrier group without SSB transmission, the SSB measurement results are detected after the WUS triggers the SSB transmission successfully.

[0459] ◆If at least one carrier is a suitable cell, the UE selects one of the carriers according to the first rule and sends a WUS to it, obtains SIB1 and then resides on the carrier (monitor paging).

[0460] ■The UE ignores the second carrier group and seeks other suitable cells.

[0461] Optionally, in some embodiments, the UE performs one of the following to determine a target carrier for performing the first operation:

[0462] ■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, 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 and receives SIB1 and / or SSB, and determines whether the one or more carriers are suitable cells based on the SSB measurement result and SIB1.

[0463] ◆If at least one carrier is a suitable cell, the UE selects one of the carriers for monitor paging according to the first rule.

[0464] ■The UE selects one or more carriers in the first carrier and the second carrier group as target cells according to the first rule: for the first carrier, determine whether it is a suitable cell based on the SSB measurement result and SIB1 configuration; for the carrier in the second carrier group with SSB transmission, determine 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; for the carrier in the second carrier group without SSB transmission, send the corresponding WUS to receive SIB1 and SSB, and determine whether the one or more carriers are suitable cells based on the SSB measurement result and SIB1.

[0465] ◆If at least one carrier is a suitable cell, the UE selects one of the carriers according to the first rule: if the carrier is the first carrier, it directly resides on the first carrier; if the carrier is a carrier of the second carrier group, it sends a WUS to the carrier, obtains SIB1, and then resides on the carrier (monitor paging).

[0466] 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. If a second carrier in a second carrier group is determined to be a highest ranked cell or a target cell for cell reselection, the UE performs at least one of the following:

[0467] ■Send WUS to the carrier, obtain SIB1 and / or SSB and determine whether the cell is a suitable cell.

[0468] ◆If it is a suitable cell, the UE performs cell reselection and camps on the cell.

[0469] ■ Determine whether the cell is a suitable cell. If it is a suitable cell, send WUS to obtain SIB1, perform cell reselection and stay in the cell.

[0470] ■Sending a WUS to the carrier triggers the sending of an SSB. After obtaining the SSB measurement results, the UE determines whether the cell is a suitable cell. If it is a suitable cell, it sends a WUS to obtain SIB1, performs cell reselection, and resides in the cell.

[0471] 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.

[0472] 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:

[0473] 1) If the selected target carrier is the first carrier, RACH is directly initiated for random access;

[0474] 2) If the selected target carrier is a carrier of the second carrier group, a WUS is first sent to the carrier to obtain SIB1 and / or SSB, and then a RACH is initiated on the carrier for random access according to the configuration of SIB1.

[0475] 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:

[0476] The target carrier is not in the bar state for the UE;

[0477] The RSRP / RSRQ measured on the target carrier meets certain conditions, such as being greater than or equal to a threshold;

[0478] The target carrier is a suitable cell for the UE;

[0479] The target carrier performs normal SSB transmission.

[0480] 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:

[0481] Randomly select the target carrier;

[0482] 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;

[0483] The network side indicates / configures the target carrier for the UE to perform random access;

[0484] Selecting the carrier with the largest or smallest carrier index as the target carrier;

[0485] Select the carrier with the largest, smallest or middle center frequency as the target carrier;

[0486] Select the carrier with the largest or smallest SCS as the target carrier;

[0487] Selecting a second carrier with the smallest frequency interval from the first carrier as the target carrier;

[0488] Select the carrier that needs to send the least number of WUS as the target carrier;

[0489] Select the carrier with the highest priority as the target carrier;

[0490] The carrier with the largest RSRP / SINR measurement value of the reference signal is selected as the target carrier.

[0491] In the scenario 4 mentioned above (the second carrier does not send SSB (with the first carrier as a reference), does not send SIB1, and does not perform normal RACH monitoring), the first carrier is configured with WUS configuration information that triggers each second carrier in the second carrier group to send SIB1 and perform RACH monitoring. All second carriers in the second carrier group send SSB or do not send SSB (with the first carrier as a reference) and do not perform normal RACH monitoring. In an exemplary embodiment:

[0492] Cell 0: Belongs to band 0, sends SSBs normally, and is configured with WUS configuration information that triggers SIB1, SSB transmission, and / or RACH monitoring of Cell 1, Cell 2, and Cell 3;

[0493] Cell 1: 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;

[0494] Cell 2: belongs to Band 2, sends SSB normally, does not monitor RACH normally, and does not send SIB1;

[0495] Cell 3: belongs to Band 3, does not send SSB (with the first carrier as a reference), does not perform normal RACH monitoring, and does not send SIB1.

[0496] For scenario 4, regarding the first information about the second carrier group sent by the network device via the first carrier, how the UE determines the target object for performing the first operation based on the first rule and the first information, refer to the description of scenario 2 above. Only the differences between the two are described here. In an exemplary embodiment, the difference between the two is:

[0497] For random access:

[0498] In some embodiments, when the selected random access carrier is a carrier of the second carrier group, the UE needs to send a WUS to trigger the target carrier to perform RACH monitoring and then perform a RACH random access process.

[0499] For WUS:

[0500] In some embodiments, each WUS has a single function. For example, the first WUS is used to trigger the transmission of SIB1 on the target carrier. After detecting SIB1, the UE sends a second WUS to trigger RACH monitoring on the target carrier. The resource configuration information of these two WUSs is configured by the network side through Cell0 (the first carrier), and the time-frequency resources sent by these two WUSs can be completely overlapping resources or two independent sets of resources.

[0501] In some embodiments, one WUS may also be used to complete two functions: triggering the target carrier to send SIB1 and triggering the target carrier to perform RACH monitoring.

[0502] In the scenario 5 mentioned above (the second carrier does not send SSB, does not send SIB1, and does not perform normal RACH monitoring), the first carrier is configured with WUS configuration information that triggers each second carrier in the second carrier group to send SSB, SIB1, and perform RACH monitoring. At least one second carrier in the second carrier group does not send SSB, does not send SIB1, and does not perform normal RACH monitoring. In an exemplary embodiment:

[0503] Cell 0: Belongs to band 0, sends SSBs normally, and is configured with WUS configuration information that triggers SIB1 and SSB transmission and RACH monitoring of Cell 1, Cell 2, and Cell 3;

[0504] Cell 1: Belongs to Band 1, sends SSB on demand, does not perform normal RACH monitoring, and does not send SIB1;

[0505] Cell 2: belongs to Band 2, sends SSB normally, does not monitor RACH normally, and does not send SIB1;

[0506] Cell 3: Belongs to Band 3, sends sparse SSB, does not perform normal RACH monitoring, and does not send SIB1.

[0507] For scenario 5, regarding the first information about the second carrier group sent by the network device via the first carrier, how the UE determines the target object for performing the first operation based on the first rule and the first information, refer to the description of scenario 3 above. Only the differences between the two are described here. In an exemplary embodiment, the difference between the two is:

[0508] For random access:

[0509] In some embodiments, when the selected random access carrier is a carrier of the second carrier group, the UE needs to send a WUS to trigger the target carrier to perform RACH monitoring and then perform a RACH random access process.

[0510] For WUS:

[0511] In some embodiments, the first WUS is used to trigger the SIB1 transmission and SSB transmission of the target carrier. After detecting the SIB1 or SSB sent by the target carrier, the UE sends a second WUS to trigger the RACH monitoring of the target carrier. The resource configuration of these two WUSs is configured by the network side through Cell0 (first carrier), and the time-frequency resources sent by these two WUSs can be completely overlapping resources or two independent sets of resources. Taking the target carrier as Cell2 as an example, the process of UE sending WUS to initiating random access is shown in Figure 6.

[0512] Referring to FIG6 , it can be seen that the process may include:

[0513] Step 601: The UE sends a first WUS to Cell2 via Cell0 to trigger Cell2 to send SSB and SIB1.

[0514] Step 602: The UE monitors the SSB and SIB1 sent by Cell2 according to the first information.

[0515] Step 603: The UE sends a second WUS to Cell2 via Cell0 to trigger Cell2 to perform RACH monitoring.

[0516] Step 604: The UE initiates random access to Cell2 based on the monitored SSB and SIB1.

[0517] In some embodiments, a WUS can also accomplish three functions: triggering the target carrier to send SIB1, SSB, and triggering the target carrier to monitor RACH. Taking the target carrier as Cell2 as an example, the process of the UE sending a WUS to initiate random access is shown in Figure 7.

[0518] Referring to FIG. 7 , it can be seen that the process may include:

[0519] Step 701: The UE sends a first WUS to Cell2 via Cell0 to trigger the sending of SSB and SIB1 and perform RACH monitoring.

[0520] Step 702: The UE monitors the SSB and SIB1 sent by Cell2 according to the first information.

[0521] Step 703: The UE initiates random access to Cell2 according to the monitored SSB and SIB1.

[0522] Example 2 (When there are multiple carriers, the UE selects the carrier with the highest priority for RACH)

[0523] The terminal obtains first information about second carriers Cell1, Cell2, and Cell3 on the first operating carrier Cell0. In an exemplary embodiment:

[0524] Cell 0: Belongs to band 0, sends SSB normally, and is configured with WUS configuration information that triggers SSB and SIB1 transmission and RACH monitoring of Cell 1, Cell 2, and Cell 3;

[0525] Cell 1: Belongs to Band 1, abnormally sends SSB (with the first carrier as the reference), does not perform normal RACH monitoring, and abnormally sends SIB1 (on-demand SIB1).

[0526] Cell 2: Belongs to Band 2, sends SSB on demand, does not perform normal RACH monitoring, and sends SIB1 normally;

[0527] Cell 3: Belongs to Band 3, abnormally sends SSB (with the first carrier as the reference), does not perform normal RACH monitoring, and abnormally sends SIB1 (on-demand SIB1);

[0528] Cell 4: Belongs to Band 4, abnormally sends SSB (with the first carrier as the reference), performs normal RACH monitoring, and abnormally sends SIB1 (on-demand SIB1);

[0529] Cell 5: Belongs to Band 5. It does not send SSBs normally (with the first carrier as a reference). It monitors RACH normally and sends SIB1 normally.

[0530] In this embodiment, the UE selects a target carrier for random access according to the priority of the carriers:

[0531] ●The priority of the carrier for sending SSB normally > the priority of the carrier for sending SSB abnormally (with the first carrier as a reference) > the priority of the carrier for sending SSB on demand (on-demand SSB);

[0532] ●The carrier priority of the normal SIB is greater than the carrier priority of the on-demand SIB.

[0533] ●The carrier priority of normal RACH monitoring is greater than the carrier priority of on-demand RACH monitoring.

[0534] It should be noted that the on-demand SSB involved in the embodiments of the present application 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.

[0535] 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)

[0536] The terminal obtains first information about second carriers Cell1, Cell2, Cell3, Cell4, and Cell5 on the first operating carrier Cell0. In an exemplary embodiment:

[0537] Cell 0: belongs to band 0, sends SSB normally, performs normal RACH monitoring, and sends SIB1 normally;

[0538] 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 sends SIB1 normally;

[0539] Cell 2: Belongs to Band 2, sends SSB on demand, performs normal RACH monitoring, and sends SIB1 on demand.

[0540] Cell 3: Belongs to Band 3, sends SSB normally, does not perform normal RACH monitoring, and sends SIB1 on demand;

[0541] Cell 4: Belongs to Band 4, does not send SSB normally (with the SSB of the first carrier as a reference), does not perform normal RACH monitoring, and sends SIB1 normally;

[0542] Cell 5: Belongs to Band 5, sends SSB on demand, does not perform normal RACH monitoring, and sends SIB1 on demand.

[0543] The UE selects a carrier for random access on the second carrier group according to the principle of sending the least number of WUSs. In this embodiment, sending a WUS is either used to trigger SIB1 and / or SSB transmission or to trigger RACH monitoring. In an exemplary embodiment:

[0544] For Cell 1, there is no need to send a WUS. The UE can directly use the SSB of the first carrier as a reference to perform random access in Cell 1.

[0545] For Cell2, two WUSs need to be sent to trigger the sending of Cell2's SSB and SIB1.

[0546] ● For Cell3, two WUSs need to be sent to trigger Cell3's SIB1 transmission and RACH monitoring;

[0547] ● For Cell 4, a WUS needs to be sent to trigger RACH monitoring of Cell 4;

[0548] ●For Cell5, two WUSs need to be sent, one to trigger the sending of SSB and SIB1, and one to trigger ARCH monitoring.

[0549] The above describes a random access method provided by 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 is described below.

[0550] As shown in FIG8 , a communication method proposed in an embodiment of the present application may include:

[0551] In step 801, 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 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.

[0552] 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.

[0553] 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.

[0554] 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), wherein 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.

[0555] The first information corresponds to at least one second access object in the second access object group, and the first information may include at least one of the following:

[0556] 1) triggering the at least one second access object to send a wake-up signal WUS configuration information of an SSB, or triggering the at least one second access object to adapt to the SSB WUS configuration information, wherein the SSB includes at least one of a synchronization signal block and a physical broadcast channel block;

[0557] 2) triggering the at least one second access object to send WUS configuration information of the SIB, or triggering the WUS configuration information of the SIB adaptive adjustment of the at least one second access object;

[0558] 3) 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;

[0559] 4) The configuration information related to the SSB currently being sent by the at least one second access object may include at least one of the following:

[0560] whether the at least one second access object is sending an SSB;

[0561] 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;

[0562] 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.

[0563] 5) The configuration information related to the SIB currently being sent by the at least one second access object may include at least one of the following:

[0564] whether the at least one second access object sends an SIB;

[0565] a sending period of the SIB being sent by the at least one second access object;

[0566] Configuration information of at least one of a physical downlink control channel PDCCH and a control resource set associated with the SIB being sent by the at least one second access object;

[0567] The transmission mode of the SIB being sent by the at least one second access object, the transmission mode including one of a normal transmission mode, an energy-saving transmission mode, a compact transmission mode, a long-cycle transmission mode (SIB transmission cycle is long), and an on-demand transmission mode. Among them, 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 aggregated transmission mode can be a transmission mode in which there is no time domain gap (gap) between multiple SIB1s.

[0568] 6) The configuration information related to the RACH monitoring behavior currently in which the at least one second access object is located may include at least one of the following:

[0569] whether the at least one second access object performs RACH monitoring;

[0570] 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;

[0571] 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).

[0572] 7) The SSB configuration information sent after a successful WUS trigger may include at least one of the following:

[0573] 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;

[0574] 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;

[0575] 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;

[0576] 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;

[0577] 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;

[0578] After the WUS is successfully triggered, the time domain resource position of the first SSB or the first SIB 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;

[0579] 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.

[0580] 8) The SIB configuration information sent by the WUS after successful triggering may include at least one of the following:

[0581] After the WUS is successfully triggered, the at least one second object sends the transmission period of the SIB, and configuration information of at least one of the physical downlink control channel (PDCCH) and the control resource set (CORESET) that carries the scheduling information of the SIB;

[0582] After the WUS is successfully triggered, the at least one second object sends a listening window for the SIB, that is, the UE listens to the SIB within the listening window;

[0583] After the WUS is successfully triggered, the at least one second object sends one of the transmission time length, number of transmissions, and number of transmission cycles of the SIB, such as one of the transmission time length, number of transmissions, and number of transmission cycles of SIB1;

[0584] After the WUS is successfully triggered, the at least one second object sends the frequency domain resource information of the SIB, where the frequency domain resource information includes at least one of the starting position of the frequency domain resource (for example, the carrier, BWP, or the position of the frequency band), the number of frequency bands occupied by the frequency domain resource, and the bandwidth size of the signal;

[0585] After the WUS is successfully triggered, the at least one second object sends time domain resource information of the SIB, where the time domain resource information includes at least one of a time domain resource position (for example, an offset relative to a synchronization / broadcast channel), a listening window size, a listening window period, a number of time domain repetition transmissions, and a time domain repetition transmission mode;

[0586] After the WUS is successfully triggered, the at least one second object sends a transmission mode of the SIB, where the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, an aggregated transmission mode, a long-cycle transmission mode, and an on-demand transmission mode. The energy-saving transmission mode may be a simplified transmission mode that only sends core configuration information such as RACH, and the aggregated transmission mode may be a transmission mode in which there is no time domain gap between multiple SIB1s.

[0587] 9) Configuration information related to RACH monitoring after successful WUS triggering may include:

[0588] 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.

[0589] 10) The characteristic information of the at least one second access object may include at least one of the following:

[0590] identification information of the at least one second access object;

[0591] whether the at least one second access object can use the first access object as a reference access object;

[0592] whether the at least one second access object is co-located with the first access object;

[0593] whether the at least one second access object and the first access object are in the same timing advance group (TAG);

[0594] whether the at least one second access object has a Quasi Co-Location (QCL) relationship with the first access object;

[0595] a reference access object of the at least one second access object;

[0596] an access object co-located with the at least one second access object;

[0597] an access object that is located in the same TAG as the at least one second access object;

[0598] an access object having a QCL relationship with the at least one second access object;

[0599] Whether the at least one second access object is in a prohibited Bar state;

[0600] The priority of the at least one second access object when the UE performs random access channel selection;

[0601] 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;

[0602] 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;

[0603] whether the at least one second access object supports UE residency;

[0604] Whether the at least one second access object is a suitable cell;

[0605] whether the at least one second access object supports cell selection and / or cell reselection;

[0606] Partial system information of the at least one second access object, the partial system information including: Public Land Mobile Network (PLMN) information, relevant configuration information of cell selection criteria, relevant configuration information of cell reselection criteria and at least one item of cell barring (Cell Bar) information.

[0607] The WUS configuration information included in the first information may include at least one of the following:

[0608] 1) The synchronization reference configuration information of the WUS may include at least one of the following:

[0609] 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;

[0610] GPS timing.

[0611] 2) WUS resource configuration information may include at least one of the following:

[0612] Time domain resource information;

[0613] Frequency domain resource information;

[0614] The signal sequence configuration information, for example, a preamble group, may indicate a preamble group index, indicating that the group of preambles is used to trigger the SSB of the at least one second access object.

[0615] 3) The power configuration information of the WUS may include at least one of the following:

[0616] Initial signal power;

[0617] Signal power ramp-up step size.

[0618] 4) The WUS retransmission configuration information may include at least one of the following:

[0619] The number of repetitions of a single signal transmission;

[0620] The maximum number of repetitions sent by the channel.

[0621] 5) WUS airspace parameter configuration information may include at least one of the following:

[0622] A correspondence between the WUS and the SSB of the first access object;

[0623] a correspondence between the WUS and the SSB of the at least one second access object;

[0624] The correspondence between WUS and the SSB of the second access object group.

[0625] 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.

[0626] The form of the WUS signal includes at least one of the following:

[0627] RACH;

[0628] Msg1;

[0629] Preamble sequence;

[0630] Sounding Reference Signal (SRS);

[0631] Physical Uplink Control Channel (PUCCH).

[0632] The configuration method of the WUS resource configuration information includes at least one of the following:

[0633] 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;

[0634] 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;

[0635] 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;

[0636] One or more signal resources are configured for the second access object or the second access object group in the first information.

[0637] The signal resources configured by the WUS resource configuration information include at least one of the following:

[0638] 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;

[0639] 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 / SIB 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;

[0640] 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 / SIB transmission and / or RACH monitoring.

[0641] The grouping method of the second access object group includes at least one of the following:

[0642] Configured by network-side devices;

[0643] As stipulated by the agreement.

[0644] The grouping rule of the second access object group includes at least one of the following:

[0645] The second access objects in the same frequency band are grouped together;

[0646] The second access objects in the same frequency band interval are grouped together;

[0647] The second access objects having at least one of the same initial BWP, active BWP, SSB, and SCS are grouped together;

[0648] 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;

[0649] The second access object of the co-location is a group;

[0650] The second access objects with the same SSB sending period are grouped together.

[0651] Regarding how the terminal 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, please refer to the above introduction to the embodiment shown in Figure 2, which will not be repeated here.

[0652] The embodiment shown in Figure 8 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, the capacity of the network side can be guaranteed as much as possible while saving energy on the network side.

[0653] Optionally, when 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 SSB / SIB, or triggering the WUS configuration information for SSB / SIB 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 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:

[0654] 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, a SIB, and monitor a RACH.

[0655] In one example, the target access object receives a wake-up signal WUS, which is sent by the terminal when a first condition is met.

[0656] The first condition may include at least one of the following:

[0657] 1) The first access object is not a suitable cell;

[0658] 2) The target access object is a suitable cell;

[0659] 3) performing intra-frequency or inter-frequency measurement on the target access object;

[0660] 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;

[0661] 5) The terminal is sensitive to access delay;

[0662] 6) The terminal is in the process of recovering from link failure.

[0663] 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.

[0664] The second energy-saving state may include at least one of the following:

[0665] Do not send SIB, send SSB normally, and perform normal RACH monitoring;

[0666] 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;

[0667] Do not send SIB, send SSB normally, and do not perform normal RACH monitoring;

[0668] Do not send SIB, do not send SSB, or send energy-saving SSB (such as simplified SSB or sparse SSB), and do not perform normal RACH monitoring;

[0669] Send SIB, send SSB normally, and do not perform normal RACH monitoring;

[0670] Send SIB, do not send SSB or send energy-saving SSB, and do not perform normal RACH monitoring;

[0671] Send SIB, send SSB normally, and perform normal RACH monitoring;

[0672] Send SIB, do not send SSB or send energy-saving SSB, and perform normal RACH monitoring;

[0673] Among them, the energy-saving SSB includes one of lightweight SSB, simplified SSB, sparse SSB and long-cycle SSB.

[0674] In the first example, the target access object receives a wake-up signal WUS, which may include: the target access object receives a WUS, which can be used to achieve two purposes: one is to trigger the target access object to send SSB and / or send SIB, and the other is to trigger the target access object to monitor RACH.

[0675] 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 and / or send SIB; the target access object receives a second WUS, wherein the second WUS is used to trigger the target access object to monitor RACH.

[0676] Exemplarily, the target access object receiving the second WUS (a time point of receiving the second WUS) includes the following:

[0677] The target access object receives a second WUS that the terminal starts sending Z time slots / symbols / milliseconds after sending the first WUS;

[0678] 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;

[0679] The target access object receives a second WUS that is started to be sent Y time slots / symbols / milliseconds after the terminal receives the first SSB or the first SIB sent after successfully triggering the target access object;

[0680] 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;

[0681] 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.

[0682] 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.

[0683] Optionally, when the WUS is used to trigger the target access object to send an SSB / SIB, a communication method provided by an embodiment of the present application may further include: the target access object sending an SSB / SIB. This enables the target access object to send an SSB / SIB on demand (on-demand) under the triggering of the WUS, thereby preparing for the UE to access the target access object, thereby increasing the capacity of the network side.

[0684] Optionally, a communication method provided in an embodiment of the present application may further include:

[0685] The target access object monitors a first operation (eg, random access) initiated by the terminal.

[0686] Optionally, a communication method provided in an embodiment of the present application may further include:

[0687] 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.

[0688] The second condition may include but is not limited to at least one of the following:

[0689] 1)SSB detection failed;

[0690] 2) The number of random accesses reaches the maximum value;

[0691] The number of WUS transmissions is less than or equal to the preset maximum number of transmissions;

[0692] 3) No feedback was received for the previous WUS;

[0693] 4) The previous WUS is used to trigger the sending of SSB / SIB. After receiving feedback on the previous WUS signal, another WUS is sent to trigger RACH monitoring (that is, the WUS is sent again to trigger RACH monitoring);

[0694] 5) No feedback for the previous WUS is received before the timer expires.

[0695] Optionally, the resent WUS signal has at least one of the following characteristics:

[0696] 1) Signal power increases;

[0697] 2) The time interval between the sending of the last WUS is greater than the preset time interval;

[0698] 3) Frequency domain resources and sequence resources are the same as those of the previous WUS.

[0699] The above describes a communication method for a network and a device provided in an embodiment of the present application.

[0700] 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.

[0701] 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.

[0702] As shown in FIG9 , an embodiment of the present application provides a random access apparatus 900 . The apparatus 900 may include: an information receiving module 901 and an access object selecting module 902 .

[0703] The information receiving module 901 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.

[0704] 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.

[0705] 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.

[0706] 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). In an embodiment of the present application, SSB includes at least one of a synchronization signal block (Synchronization Signal Block, SSB) and a physical broadcast channel block (Physical Broadcast Channel block).

[0707] The first information corresponds to at least one second access object in the second access object group, and the first information may include at least one of the following:

[0708] 1) triggering the at least one second access object to send a wake-up signal WUS configuration information of an SSB, or triggering the at least one second access object to adapt to the SSB WUS configuration information, wherein the SSB includes at least one of a synchronization signal block and a physical broadcast channel block;

[0709] 2) triggering the at least one second access object to send WUS configuration information of the SIB, or triggering the WUS configuration information of the SIB adaptive adjustment of the at least one second access object;

[0710] 3) 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;

[0711] 4) The configuration information related to the SSB currently being sent by the at least one second access object may include at least one of the following:

[0712] whether the at least one second access object is sending an SSB;

[0713] 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;

[0714] 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.

[0715] 5) The configuration information related to the SIB currently being sent by the at least one second access object may include at least one of the following:

[0716] whether the at least one second access object sends an SIB;

[0717] a sending period of the SIB being sent by the at least one second access object;

[0718] Configuration information of at least one of a physical downlink control channel PDCCH and a control resource set associated with the SIB being sent by the at least one second access object;

[0719] The transmission mode of the SIB being sent by the at least one second access object, the transmission mode including one of a normal transmission mode, an energy-saving transmission mode, a compact transmission mode, a long-cycle transmission mode (SIB transmission cycle is long), and an on-demand transmission mode. Among them, 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 aggregated transmission mode can be a transmission mode in which there is no time domain gap (gap) between multiple SIB1s.

[0720] 6) The configuration information related to the RACH monitoring behavior currently in which the at least one second access object is located may include at least one of the following:

[0721] whether the at least one second access object performs RACH monitoring;

[0722] 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;

[0723] 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).

[0724] 7) The SSB configuration information sent by the WUS after successful triggering may include at least one of the following:

[0725] 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;

[0726] 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;

[0727] 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;

[0728] 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;

[0729] 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;

[0730] After the WUS is successfully triggered, the time domain resource position of the first SSB or the first SIB 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;

[0731] 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.

[0732] 8) The SIB configuration information sent by the WUS after successful triggering may include at least one of the following:

[0733] After the WUS is successfully triggered, the at least one second object sends the transmission period of the SIB, and configuration information of at least one of the physical downlink control channel (PDCCH) and the control resource set (CORESET) that carries the scheduling information of the SIB;

[0734] After the WUS is successfully triggered, the at least one second object sends a listening window for the SIB, that is, the UE listens to the SIB within the listening window;

[0735] After the WUS is successfully triggered, the at least one second object sends one of the transmission time length, number of transmissions, and number of transmission cycles of the SIB, such as one of the transmission time length, number of transmissions, and number of transmission cycles of SIB1;

[0736] After the WUS is successfully triggered, the at least one second object sends the frequency domain resource information of the SIB, where the frequency domain resource information includes at least one of the starting position of the frequency domain resource (for example, the carrier, BWP, or the position of the frequency band), the number of frequency bands occupied by the frequency domain resource, and the bandwidth size of the signal;

[0737] After the WUS is successfully triggered, the at least one second object sends time domain resource information of the SIB, where the time domain resource information includes at least one of a time domain resource position (for example, an offset relative to a synchronization / broadcast channel), a listening window size, a listening window period, a number of time domain repetition transmissions, and a time domain repetition transmission mode;

[0738] After the WUS is successfully triggered, the at least one second object sends a transmission mode of the SIB, where the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, an aggregated transmission mode, a long-cycle transmission mode, and an on-demand transmission mode. The energy-saving transmission mode may be a simplified transmission mode that only sends core configuration information such as RACH, and the aggregated transmission mode may be a transmission mode in which there is no time domain gap between multiple SIB1s.

[0739] 9) Configuration information related to RACH monitoring after successful WUS triggering may include:

[0740] 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.

[0741] 10) The characteristic information of the at least one second access object may include at least one of the following:

[0742] identification information of the at least one second access object;

[0743] whether the at least one second access object can use the first access object as a reference access object;

[0744] whether the at least one second access object is co-located with the first access object;

[0745] whether the at least one second access object and the first access object are in the same timing advance group (TAG);

[0746] whether the at least one second access object has a Quasi Co-Location (QCL) relationship with the first access object;

[0747] a reference access object of the at least one second access object;

[0748] an access object co-located with the at least one second access object;

[0749] an access object that is located in the same TAG as the at least one second access object;

[0750] an access object having a QCL relationship with the at least one second access object;

[0751] Whether the at least one second access object is in a prohibited Bar state;

[0752] The priority of the at least one second access object when the UE performs random access channel selection;

[0753] 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;

[0754] 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;

[0755] whether the at least one second access object supports UE residency;

[0756] Whether the at least one second access object is a suitable cell;

[0757] whether the at least one second access object supports cell selection and / or cell reselection;

[0758] Partial system information of the at least one second access object, the partial system information including: Public Land Mobile Network (PLMN) information, relevant configuration information of cell selection criteria, relevant configuration information of cell reselection criteria and at least one item of cell barring (Cell Bar) information.

[0759] The WUS configuration information included in the first information may include at least one of the following:

[0760] 1) The synchronization reference configuration information of the WUS may include at least one of the following:

[0761] 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;

[0762] GPS timing.

[0763] 2) WUS resource configuration information may include at least one of the following:

[0764] Time domain resource information;

[0765] Frequency domain resource information;

[0766] The signal sequence configuration information, for example, a preamble group, may indicate a preamble group index, indicating that the group of preambles is used to trigger the SSB of the at least one second access object.

[0767] 3) The power configuration information of the WUS may include at least one of the following:

[0768] Initial signal power;

[0769] Signal power ramp-up step size.

[0770] 4) The WUS retransmission configuration information may include at least one of the following:

[0771] The number of repetitions of a single signal transmission;

[0772] The maximum number of repetitions sent by the channel.

[0773] 5) WUS airspace parameter configuration information may include at least one of the following:

[0774] A correspondence between the WUS and the SSB of the first access object;

[0775] a correspondence between the WUS and the SSB of the at least one second access object;

[0776] The correspondence between WUS and the SSB of the second access object group.

[0777] 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.

[0778] The form of the WUS signal includes at least one of the following:

[0779] RACH;

[0780] Msg1;

[0781] Preamble sequence;

[0782] Sounding Reference Signal (SRS);

[0783] Physical Uplink Control Channel (PUCCH).

[0784] The configuration method of the WUS resource configuration information includes at least one of the following:

[0785] 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;

[0786] 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;

[0787] 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;

[0788] One or more signal resources are configured for the second access object or the second access object group in the first information.

[0789] The signal resources configured by the WUS resource configuration information include at least one of the following:

[0790] 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;

[0791] 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 / SIB 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;

[0792] 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 / SIB transmission and / or RACH monitoring.

[0793] The grouping method of the second access object group includes at least one of the following:

[0794] Configured by network-side devices;

[0795] As stipulated by the agreement.

[0796] The grouping rule of the second access object group includes at least one of the following:

[0797] The second access objects in the same frequency band are grouped together;

[0798] The second access objects in the same frequency band interval are grouped together;

[0799] The second access objects having at least one of the same initial BWP, active BWP, SSB, and SCS are grouped together;

[0800] 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;

[0801] The second access object of the co-location is a group;

[0802] The second access objects with the same SSB sending period are grouped together.

[0803] The access object selection module 902 is 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.

[0804] One or more access objects that the terminal can randomly access, as indicated or configured by the network-side device;

[0805] The access object to be randomly accessed by the terminal is defaulted to be the first access object;

[0806] Bar status information of the second access object;

[0807] an index value of the second access object;

[0808] a center frequency of the second access object;

[0809] a subcarrier spacing (SCS) of the second access object;

[0810] an identifier of the second access object;

[0811] a frequency interval between the second access object and the first access object;

[0812] Whether the second access object performs normal RACH monitoring;

[0813] Whether the second access object sends SSB normally;

[0814] Whether the second access object sends the SIB normally;

[0815] Whether the second access object satisfies at least two of normal RACH monitoring, normal SSB transmission, and normal SIB transmission;

[0816] The number of times a WUS needs to be sent to the second access object;

[0817] the priority of the second access object;

[0818] 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);

[0819] Randomly generated access object index;

[0820] a weight value of the second access object;

[0821] Randomly generated access object weight value;

[0822] whether the first access object is a suitable cell;

[0823] Whether the second access object is a suitable cell.

[0824] 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:

[0825] 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:

[0826] The priority of the second access object that normally sends SSBs is greater than the priority of the second access object that uses the first access object as a reference and does not send SSBs. The priority of the second access object that sends SSBs on demand is greater than the priority of the second access object that normally sends SSBs.

[0827] The priority of the second access object for sending SIB normally is greater than the priority of the second access object for sending SIB on demand;

[0828] The priority of the second access object that monitors the RACH normally is greater than the priority of the second access object that monitors the RACH on demand.

[0829] ② The frequency band interval between the second access object and the first access object;

[0830] ③The number of the second access object.

[0831] The following two examples illustrate how the access object selection module 902 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 following embodiments and will not be described in detail here. See below for details.

[0832] First example

[0833] The access object selection module 902 may be used to:

[0834] Determining whether the first access object is a suitable cell;

[0835] If the first access object is a suitable cell, selecting the first access object as a target access object;

[0836] In a case where the first access object is not a suitable cell, one of the first step, the second step and the third step is performed.

[0837] Wherein, the first step includes:

[0838] determining, according to a reference signal measurement result corresponding to at least one second access object in the second access object group and a system information SIB sent by the at least one second access object triggered by the WUS, whether the at least one second access object is a suitable cell;

[0839] 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.

[0840] Wherein, the second step includes:

[0841] determining, according to a reference signal measurement result corresponding to at least one second access object in the second access object group and a portion of the SIB 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;

[0842] In the 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 the first rule, and in the case where the terminal fails to obtain the SIB of the suitable cell, a WUS that triggers the sending of the SIB is sent to the suitable cell, and after receiving the SIB, the suitable cell is used as the target access object for performing the first operation.

[0843] Wherein, the third step includes:

[0844] The second access object is ignored, and other suitable cells are searched as target access objects for performing operations.

[0845] Furthermore, searching for another suitable cell as a target access object for performing the first operation may include:

[0846] Searching for a suitable cell as a target access object for performing an operation from one or more second access objects in the second access object group;

[0847] searching, from one or more third access objects in a third access object group, for a suitable cell as a target access object for which the operation is to be performed, wherein the third access object group includes access objects that meet a third condition;

[0848] The third condition includes at least one of the following:

[0849] Taking the first access object as a reference;

[0850] co-located with the first access object;

[0851] A continuous access object belonging to the same frequency band as the first access object.

[0852] Second example

[0853] The access object selection module 902 may be configured to execute the fourth step or the fifth step.

[0854] Wherein, the fourth step includes:

[0855] determining, according to a reference signal measurement result of the first access object and a system information SIB of the first access object, whether the first access object is a suitable cell;

[0856] determining, according to a reference signal measurement result of at least one second access object in the second access object group and a portion of the SIB 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;

[0857] When the first access object is a suitable cell and one or more second access objects among the at least one second access object are suitable cells, selecting a suitable cell from the first access object and the at least one second access object according to a first rule;

[0858] If the suitable cell is the first access object, taking the suitable cell as the target access object for performing the first operation;

[0859] If the suitable cell is the second access object, a WUS that triggers the sending of the SIB is sent to the suitable cell, and after receiving the SIB, the suitable cell is used as the target access object for performing the first operation.

[0860] Wherein, the fifth step includes:

[0861] determining, according to a reference signal measurement result of the first access object and a SIB of the first access object, whether the first access object is a suitable cell;

[0862] determining, according to a reference signal measurement result of at least one second access object in the second access object group and a SIB sent by the at least one second access object triggered by the WUS, whether the at least one second access object is a suitable cell;

[0863] 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.

[0864] 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.

[0865] The embodiment shown in Figure 9 provides a random access device. Since the network side device can provide the terminal with first information about the second access object group through the first 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 send SSB, SIB and other information all the time, but sends SSB / SIB 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 to the greatest extent possible.

[0866] Optionally, as shown in FIG10 , a random access device 900 provided in an embodiment of the present application may further include:

[0867] The first WUS sending module 903 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 for triggering the at least one second access object to send SSB / SIB, or triggering the WUS configuration information for SSB / SIB 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 triggering the WUS configuration information for RACH monitoring adaptive adjustment of the at least one second access object, wherein the WUS is used to trigger the target access object to send at least one of SSB, SIB and RACH.

[0868] In an example, the first WUS sending module 903 is configured to: send a WUS to the target access object when a first condition is met.

[0869] The first condition may include at least one of the following:

[0870] 1) The first access object is not a suitable cell;

[0871] 2) The target access object is a suitable cell;

[0872] 3) performing intra-frequency or inter-frequency measurement on the target access object;

[0873] 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;

[0874] 5) The terminal is sensitive to access delay;

[0875] 6) The terminal is in the process of recovering from link failure.

[0876] 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.

[0877] The second energy-saving state may include at least one of the following:

[0878] Do not send SIB, send SSB normally, and perform normal RACH monitoring;

[0879] 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;

[0880] Do not send SIB, send SSB normally, and do not perform normal RACH monitoring;

[0881] Do not send SIB, do not send SSB, or send energy-saving SSB (such as simplified SSB or sparse SSB), and do not perform normal RACH monitoring;

[0882] Send SIB, send SSB normally, and do not perform normal RACH monitoring;

[0883] Send SIB, do not send SSB or send energy-saving SSB, and do not perform normal RACH monitoring;

[0884] Send SIB, send SSB normally, and perform normal RACH monitoring;

[0885] Send SIB, do not send SSB or send energy-saving SSB, and perform normal RACH monitoring;

[0886] Among them, the energy-saving SSB includes one of lightweight SSB, simplified SSB, sparse SSB and long-cycle SSB.

[0887] In the first example, the first WUS sending module 903 can be used to send 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 / or send SIB, and the other is to trigger the target access object to monitor RACH.

[0888] In a second example, the first WUS sending module 903 can be used to: send a first WUS to the target access object, wherein the first WUS is used to trigger the target access object to send SSB and / or send SIB; 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.

[0889] Exemplarily, the first WUS sending module 903 may be used for one of the following:

[0890] Z time slots / symbols / milliseconds after sending the first WUS, starting to send a second WUS for the target access object;

[0891] X time slots / symbols / milliseconds after receiving feedback on the first WUS, starting to send a second WUS for the target access object;

[0892] After receiving the first SSB or the first SIB sent after successfully triggering the target access object, Y time slots / symbols / milliseconds after, starting to send a second WUS for the target access object;

[0893] When the number of times the first WUS is sent reaches a maximum, sending a second WUS for the target access object;

[0894] 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.

[0895] The embodiment shown in Figure 10 provides a random access device 900, 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.

[0896] Optionally, as shown in FIG11 , a random access device 900 provided in an embodiment of the present application may further include:

[0897] The SSB monitoring module 904 is used to monitor the SSB / SIB sent by the target access object when the WUS is used to trigger the SSB / SIB sending.

[0898] Illustratively, the SSB monitoring module 904 may be used for one of the following:

[0899] After sending the WUS, start a third timer, and after the third timer times out, start monitoring the SSB / SIB sent by the target access object;

[0900] After sending the WUS, start monitoring the SSB / SIB sent by the target access object C time slots / symbols / milliseconds later;

[0901] Start monitoring the SSB / SIB sent by the target access object in the next time slot after sending the WUS;

[0902] Within the SSB listening window configured in the first information, listen to the SSB / SIB sent by the target access object.

[0903] The embodiment shown in FIG11 provides a random access device 900 that can trigger a target access object (a second access object) to send an SSB / SIB on demand, thereby preparing for RACH at the target access object and increasing the capacity on the network side.

[0904] Optionally, as shown in FIG12 , a random access device 900 provided in an embodiment of the present application may further include:

[0905] The operation initiating module 905 is configured to initiate the first operation to the target access object.

[0906] Exemplarily, the target access object is a second access object, and the operation initiating module 905 (the time point of initiating the first operation to the target access object) may be used for one of the following:

[0907] 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);

[0908] 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);

[0909] 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).

[0910] Optionally, a random access device 900 provided in an embodiment of the present application may further include:

[0911] 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.

[0912] The second condition may include but is not limited to at least one of the following:

[0913] 1)SSB detection failed;

[0914] 2) The number of random accesses reaches the maximum value;

[0915] The number of WUS transmissions is less than or equal to the preset maximum number of transmissions;

[0916] 3) No feedback was received for the previous WUS;

[0917] 4) The previous WUS is used to trigger the sending of SSB / SIB. After receiving feedback on the previous WUS signal, another WUS is sent to trigger RACH monitoring (that is, the WUS is sent again to trigger RACH monitoring);

[0918] 5) No feedback for the previous WUS is received before the timer expires.

[0919] Optionally, the resent WUS signal has at least one of the following characteristics:

[0920] 1) Signal power increases;

[0921] 2) The time interval between the sending of the last WUS is greater than the preset time interval;

[0922] 3) Frequency domain resources and sequence resources are the same as those of the previous WUS.

[0923] It should be noted that the device shown in FIG9 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.

[0924] As shown in FIG13 , an embodiment of the present application provides a communication device 1300 , which may include: an information sending module 1301 .

[0925] An information sending module 1301 is configured 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 is used by the terminal to select a target access object for performing a first operation, wherein the first operation includes residency or random access, and the access object includes one of a carrier, a cell, and a bandwidth part BWP.

[0926] 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.

[0927] 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.

[0928] 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), wherein 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.

[0929] The first information corresponds to at least one second access object in the second access object group, and the first information may include at least one of the following:

[0930] 1) triggering the at least one second access object to send a wake-up signal WUS configuration information of an SSB, or triggering the at least one second access object to adapt to the SSB WUS configuration information, wherein the SSB includes at least one of a synchronization signal block and a physical broadcast channel block;

[0931] 2) triggering the at least one second access object to send WUS configuration information of the SIB, or triggering the WUS configuration information of the SIB adaptive adjustment of the at least one second access object;

[0932] 3) 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;

[0933] 4) The configuration information related to the SSB currently being sent by the at least one second access object may include at least one of the following:

[0934] whether the at least one second access object is sending an SSB;

[0935] 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;

[0936] 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.

[0937] 5) The configuration information related to the SIB currently being sent by the at least one second access object may include at least one of the following:

[0938] whether the at least one second access object sends an SIB;

[0939] a sending period of the SIB being sent by the at least one second access object;

[0940] Configuration information of at least one of a physical downlink control channel PDCCH and a control resource set associated with the SIB being sent by the at least one second access object;

[0941] The transmission mode of the SIB being sent by the at least one second access object, the transmission mode including one of a normal transmission mode, an energy-saving transmission mode, a compact transmission mode, a long-cycle transmission mode (SIB transmission cycle is long), and an on-demand transmission mode. Among them, 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 aggregated transmission mode can be a transmission mode in which there is no time domain gap (gap) between multiple SIB1s.

[0942] 6) The configuration information related to the RACH monitoring behavior currently in which the at least one second access object is located may include at least one of the following:

[0943] whether the at least one second access object performs RACH monitoring;

[0944] 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;

[0945] 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).

[0946] 7) The SSB configuration information sent after a successful WUS trigger may include at least one of the following:

[0947] 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;

[0948] 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;

[0949] 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;

[0950] 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;

[0951] 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;

[0952] After the WUS is successfully triggered, the time domain resource position of the first SSB or the first SIB 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;

[0953] 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.

[0954] 8) The SIB configuration information sent by the WUS after successful triggering may include at least one of the following:

[0955] After the WUS is successfully triggered, the at least one second object sends the transmission period of the SIB, and configuration information of at least one of the physical downlink control channel (PDCCH) and the control resource set (CORESET) that carries the scheduling information of the SIB;

[0956] After the WUS is successfully triggered, the at least one second object sends a listening window for the SIB, that is, the UE listens to the SIB within the listening window;

[0957] After the WUS is successfully triggered, the at least one second object sends one of the transmission time length, number of transmissions, and number of transmission cycles of the SIB, such as one of the transmission time length, number of transmissions, and number of transmission cycles of SIB1;

[0958] After the WUS is successfully triggered, the at least one second object sends the frequency domain resource information of the SIB, where the frequency domain resource information includes at least one of the starting position of the frequency domain resource (for example, the carrier, BWP, or the position of the frequency band), the number of frequency bands occupied by the frequency domain resource, and the bandwidth size of the signal;

[0959] After the WUS is successfully triggered, the at least one second object sends time domain resource information of the SIB, where the time domain resource information includes at least one of a time domain resource position (for example, an offset relative to a synchronization / broadcast channel), a listening window size, a listening window period, a number of time domain repetition transmissions, and a time domain repetition transmission mode;

[0960] After the WUS is successfully triggered, the at least one second object sends a transmission mode of the SIB, where the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, an aggregated transmission mode, a long-cycle transmission mode, and an on-demand transmission mode. The energy-saving transmission mode may be a simplified transmission mode that only sends core configuration information such as RACH, and the aggregated transmission mode may be a transmission mode in which there is no time domain gap between multiple SIB1s.

[0961] 9) Configuration information related to RACH monitoring after successful WUS triggering may include:

[0962] 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.

[0963] 10) The characteristic information of the at least one second access object may include at least one of the following:

[0964] identification information of the at least one second access object;

[0965] whether the at least one second access object can use the first access object as a reference access object;

[0966] whether the at least one second access object is co-located with the first access object;

[0967] whether the at least one second access object and the first access object are in the same timing advance group (TAG);

[0968] whether the at least one second access object has a Quasi Co-Location (QCL) relationship with the first access object;

[0969] a reference access object of the at least one second access object;

[0970] an access object co-located with the at least one second access object;

[0971] an access object that is located in the same TAG as the at least one second access object;

[0972] an access object having a QCL relationship with the at least one second access object;

[0973] Whether the at least one second access object is in a prohibited Bar state;

[0974] The priority of the at least one second access object when the UE performs random access channel selection;

[0975] 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;

[0976] 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;

[0977] whether the at least one second access object supports UE residency;

[0978] Whether the at least one second access object is a suitable cell;

[0979] whether the at least one second access object supports cell selection and / or cell reselection;

[0980] Partial system information of the at least one second access object, the partial system information including: Public Land Mobile Network (PLMN) information, relevant configuration information of cell selection criteria, relevant configuration information of cell reselection criteria and at least one item of cell barring (Cell Bar) information.

[0981] The WUS configuration information included in the first information may include at least one of the following:

[0982] 1) The synchronization reference configuration information of the WUS may include at least one of the following:

[0983] 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;

[0984] GPS timing.

[0985] 2) WUS resource configuration information may include at least one of the following:

[0986] Time domain resource information;

[0987] Frequency domain resource information;

[0988] The signal sequence configuration information, for example, a preamble group, may indicate a preamble group index, indicating that the group of preambles is used to trigger the SSB of the at least one second access object.

[0989] 3) The power configuration information of the WUS may include at least one of the following:

[0990] Initial signal power;

[0991] Signal power ramp-up step size.

[0992] 4) The WUS retransmission configuration information may include at least one of the following:

[0993] The number of repetitions of a single signal transmission;

[0994] The maximum number of repetitions sent by the channel.

[0995] 5) WUS airspace parameter configuration information may include at least one of the following:

[0996] A correspondence between the WUS and the SSB of the first access object;

[0997] a correspondence between the WUS and the SSB of the at least one second access object;

[0998] The correspondence between WUS and the SSB of the second access object group.

[0999] 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.

[1000] The form of the WUS signal includes at least one of the following:

[1001] RACH;

[1002] Msg1;

[1003] Preamble sequence;

[1004] Sounding Reference Signal (SRS);

[1005] Physical Uplink Control Channel (PUCCH).

[1006] The configuration method of the WUS resource configuration information includes at least one of the following:

[1007] 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;

[1008] 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;

[1009] 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;

[1010] One or more signal resources are configured for the second access object or the second access object group in the first information.

[1011] The signal resources configured by the WUS resource configuration information include at least one of the following:

[1012] 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;

[1013] 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 / SIB 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;

[1014] 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 / SIB transmission and / or RACH monitoring.

[1015] The grouping method of the second access object group includes at least one of the following:

[1016] Configured by network-side devices;

[1017] As stipulated by the agreement.

[1018] The grouping rule of the second access object group includes at least one of the following:

[1019] The second access objects in the same frequency band are grouped together;

[1020] The second access objects in the same frequency band interval are grouped together;

[1021] The second access objects having at least one of the same initial BWP, active BWP, SSB, and SCS are grouped together;

[1022] 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;

[1023] The second access object of the co-location is a group;

[1024] The second access objects with the same SSB sending period are grouped together.

[1025] Regarding how the terminal 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, please refer to the above introduction to the embodiment shown in Figure 2, which will not be repeated here.

[1026] It should be noted that the device shown in FIG13 can implement the method shown in FIG8 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 FIG8 above.

[1027] Optionally, a communication device 1300 provided in an embodiment of the present application may further include:

[1028] 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 SSB / SIB, or WUS configuration information for triggering SSB / SIB 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 SSB, send SIB, and monitor RACH.

[1029] In one example, the target access object receives a wake-up signal WUS, which is sent by the terminal when a first condition is met.

[1030] The first condition may include at least one of the following:

[1031] 1) The first access object is not a suitable cell;

[1032] 2) The target access object is a suitable cell;

[1033] 3) performing intra-frequency or inter-frequency measurement on the target access object;

[1034] 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;

[1035] 5) The terminal is sensitive to access delay;

[1036] 6) The terminal is in the process of recovering from link failure.

[1037] 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.

[1038] The second energy-saving state may include at least one of the following:

[1039] Do not send SIB, send SSB normally, and perform normal RACH monitoring;

[1040] 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;

[1041] Do not send SIB, send SSB normally, and do not perform normal RACH monitoring;

[1042] Do not send SIB, do not send SSB, or send energy-saving SSB (such as simplified SSB or sparse SSB), and do not perform normal RACH monitoring;

[1043] Send SIB, send SSB normally, and do not perform normal RACH monitoring;

[1044] Send SIB, do not send SSB or send energy-saving SSB, and do not perform normal RACH monitoring;

[1045] Send SIB, send SSB normally, and perform normal RACH monitoring;

[1046] Send SIB, do not send SSB or send energy-saving SSB, and perform normal RACH monitoring;

[1047] Among them, the energy-saving SSB includes one of lightweight SSB, simplified SSB, sparse SSB and long-cycle SSB.

[1048] In the first example, the first WUS receiving module is used for: 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 / or send SIB, and the other is to trigger the target access object to monitor RACH.

[1049] In the second example, the first WUS receiving module is used: the target access object receives a first WUS for the target access object, and the first WUS is used to trigger the target access object to send SSB and / or send SIB; the target access object receives a second WUS for the target access object, wherein the second WUS is used to trigger the target access object to monitor RACH.

[1050] Exemplarily, the first WUS receiving module is used for one of the following:

[1051] 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;

[1052] 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;

[1053] The target access object receives a second WUS for the target access object that is started to be sent Y time slots / symbols / milliseconds after the terminal receives the first SSB or the first SIB sent after successfully triggering the target access object;

[1054] 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;

[1055] 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.

[1056] This embodiment provides a communication device 1300 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, and also rather than 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.

[1057] Optionally, a communication device 1300 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 / SIB when the WUS is used to trigger the target access object to send an SSB / SIB. This enables the target access object to send an SSB / SIB on demand (on-demand) under the triggering of the WUS, thereby preparing for the UE to access the target access object, thereby increasing the capacity of the network side.

[1058] Optionally, a communication device 1300 provided in an embodiment of the present application may further include: an operation receiving module, configured to monitor a first operation initiated by the terminal with respect to the target access object.

[1059] Optionally, a communication device 1300 provided in an embodiment of the present application may further include: a second WUS receiving module, used 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.

[1060] The second condition may include but is not limited to at least one of the following:

[1061] 1)SSB detection failed;

[1062] 2) The number of random accesses reaches the maximum value;

[1063] The number of WUS transmissions is less than or equal to the preset maximum number of transmissions;

[1064] 3) No feedback was received for the previous WUS;

[1065] 4) The previous WUS is used to trigger the sending of SSB / SIB. After receiving feedback on the previous WUS signal, another WUS is sent to trigger RACH monitoring (that is, the WUS is sent again to trigger RACH monitoring);

[1066] 5) No feedback for the previous WUS is received before the timer expires.

[1067] Optionally, the resent WUS signal has at least one of the following characteristics:

[1068] 1) Signal power increases;

[1069] 2) The time interval between the sending of the last WUS is greater than the preset time interval;

[1070] 3) Frequency domain resources and sequence resources are the same as those of the previous WUS.

[1071] 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.

[1072] Optionally, as shown in Figure 14, an embodiment of the present application further provides a communication device 1400, including a processor 1401 and a memory 1402, wherein the memory 1402 stores a program or instruction that can be run on the processor 1401. For example, when the communication device 1400 is a terminal, the program or instruction is executed by the processor 1401 to implement the various steps of the above-mentioned random access method embodiment and can achieve the same technical effect. When the communication device 1400 is a network-side device, the program or instruction is executed by the processor 1401 to implement the various steps of the above-mentioned communication method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[1073] 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 includes one or more second access objects different from the first access object; the processor 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 a first rule, wherein the first operation includes residency or random access, and the access object includes one of a carrier, a cell, and a bandwidth part BWP. 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. In an exemplary embodiment, Figure 15 is a schematic diagram of the hardware structure of a terminal that implements an embodiment of the present application.

[1074] The terminal 1500 includes but is not limited to: a radio frequency unit 1501, a network module 1502, an audio output unit 1503, an input unit 1504, a sensor 1505, a display unit 1506, a user input unit 1507, an interface unit 1508, a memory 1509 and at least some of the components of the processor 1510.

[1075] Those skilled in the art will appreciate that the terminal 1500 may also include a power supply (such as a battery) to power various components. The power supply may be logically connected to the processor 1510 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The terminal structure shown in FIG15 does not limit the terminal. The terminal may include more or fewer components than shown, or may combine certain components, or have different component arrangements, which will not be described in detail here.

[1076] It should be understood that in an embodiment of the present application, the input unit 1504 may include a graphics processing unit (GPU) 15041 and a microphone 15042, and the graphics processing unit 15041 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 1506 may include a display panel 15061, and the display panel 15061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1507 includes a touch panel 15071 and at least one of other input devices 15072. The touch panel 15071 is also called a touch screen. The touch panel 15071 may include two parts: a touch detection device and a touch controller. Other input devices 15072 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.

[1077] In the embodiment of the present application, after receiving downlink data from a network-side device, the radio frequency unit 1501 may transmit the data to the processor 1510 for processing. Furthermore, the radio frequency unit 1501 may send uplink data to the network-side device. Typically, the radio frequency unit 1501 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[1078] The memory 1509 can be used to store software programs or instructions and various data. The memory 1509 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 1509 may include a volatile memory or a non-volatile memory, or the memory 1509 may include both volatile and non-volatile memories. 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 1509 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[1079] Processor 1510 may include one or more processing units. Optionally, processor 1510 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 1510.

[1080] The radio frequency unit 1501 may be 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.

[1081] Among them, the processor 1510 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.

[1082] In an embodiment of the present application, since the terminal 1500 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, while saving energy on the network side, the capacity of the network side can be guaranteed as much as possible.

[1083] 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, and the first information is used by the terminal to select a target access object for performing a first operation, wherein the first operation includes resident or random access, and the access object includes one of a carrier, a cell, and a bandwidth part (BWP). 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.

[1084] In an exemplary embodiment, the present application also provides a network-side device. As shown in Figure 16, network-side device 1600 includes an antenna 1601, a radio frequency device 1602, a baseband device 1603, a processor 1604, and a memory 1605. Antenna 1601 is connected to radio frequency device 1602. In the uplink direction, radio frequency device 1602 receives information via antenna 1601 and sends the received information to baseband device 1603 for processing. In the downlink direction, baseband device 1603 processes the information to be transmitted and sends it to radio frequency device 1602. Radio frequency device 1602 processes the received information and then sends it through antenna 1601.

[1085] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 1603 , which includes a baseband processor.

[1086] The baseband device 1603 may include, for example, at least one baseband board, on which multiple chips are arranged, as shown in Figure 16, one of which is, for example, a baseband processor, which is connected to the memory 1605 through a bus interface to call the program in the memory 1605 and execute the network device operations shown in the above method embodiment.

[1087] The network side device may further include a network interface 1606, which is, for example, a common public radio interface (CPRI).

[1088] In an exemplary embodiment, the network side device 16000 of the embodiment of the present application also includes: instructions or programs stored in the memory 1605 and executable on the processor 1604. The processor 1604 calls the instructions or programs in the memory 1605 to execute the method executed by each module shown in FIG13 and achieve the same technical effect. To avoid repetition, it will not be described here.

[1089] An embodiment of the present application further 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 embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it is not repeated here.

[1090] 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.

[1091] 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.

[1092] 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.

[1093] 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.

[1094] 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 8.

[1095] 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.

[1096] 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.

[1097] 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; 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 first information corresponds to at least one second access object in the second access object group, and the first information 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; triggering the at least one second access object to send WUS configuration information of the SIB, or triggering the at least one second access object to adaptively adjust the SIB of the WUS configuration information; 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 SIB 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; SIB configuration information sent by WUS after successful triggering; Configuration information related to RACH monitoring after successful triggering by WUS; The characteristic information of the at least one second access object itself.

3. The method according to claim 1, 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 sends the SIB normally; Whether the second access object satisfies at least two of normal RACH monitoring, normal SSB transmission, and normal SIB 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.

4. 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; If the first access object is not a suitable cell, executing one of the first step, the second step and the third step; Wherein, the first step comprises: Determining 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 a system information SIB sent by the at least one second access object triggered by the WUS; 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: Determine, according to a reference signal measurement result corresponding to at least one second access object in the second access object group and a part of the SIB 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 according to the first rule, and in a case where the terminal fails to obtain the SIB of the suitable cell, sending a WUS that triggers SIB sending to the suitable cell, and taking the suitable cell as the target access object for performing the first operation after receiving the SIB; Wherein, the third step comprises: The second access object is ignored, and other suitable cells are searched as target access objects for performing operations.

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: Execute the fourth step or the fifth step; Wherein, the fourth step comprises: determining, according to a reference signal measurement result of the first access object and a system information SIB of the first access object, whether the first access object is a suitable cell; Determine, according to a reference signal measurement result of at least one second access object in the second access object group and a part of the SIB 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 the first access object is a suitable cell and one or more of the at least one second access object are suitable cells, selecting a suitable cell from the first access object and the at least one second access object according to a first rule; If the suitable cell is the first access object, taking the suitable cell as the target access object for performing the first operation; If the suitable cell is the second access object, sending a WUS that triggers the sending of the SIB to the suitable cell, and taking the suitable cell as the target access object for performing the first operation after receiving the SIB; Wherein, the fifth step comprises: determining, according to a reference signal measurement result of the first access object and a SIB of the first access object, whether the first access object is a suitable cell; determining, according to a reference signal measurement result of at least one second access object in the second access object group and a SIB sent by the at least one second access object triggered by the WUS, whether the at least one second access object is a suitable cell; 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.

6. The method according to claim 2, 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 SSB / SIB, or triggering WUS configuration information for SSB / SIB 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 triggering WUS configuration information for RACH monitoring adaptive adjustment of the at least one second access object, and the method further includes: When the first condition is met, the terminal sends a WUS for the target access object, wherein the WUS is used to trigger the target access object to send at least one of an SSB, a SIB, and monitor a RACH; 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.

7. The method according to claim 6, wherein: The sending of the WUS for the target access object includes: Sending a first WUS for the target access object, where the first WUS is used to trigger the target access object to send an SSB and / or send an SIB; A second WUS is sent to the target access object, wherein the second WUS is used to trigger the target access object to monitor the RACH.

8. The method according to claim 7, wherein: The WUS is used to trigger the target access object to send an SSB / SIB, and the method further includes: The terminal monitors and receives the SSB / SIB sent by the target access object.

9. The method according to claim 8, wherein: The terminal monitoring and receiving the SSB / SIB sent by the target access object includes the following: After sending the WUS, starting a third timer, after the third timer times out, the terminal starts to monitor and receive the SSB / SIB sent by the target access object; After C time slots / symbols / milliseconds after sending the WUS, the terminal starts to monitor and receive the SSB / SIB sent by the target access object; In the next time slot after sending the WUS, the terminal starts to monitor and receive the SSB / SIB sent by the target access object; Within the SSB listening window configured in the first information, the terminal listens to the SSB sent by the target access object, and / or, within the SIB listening window configured in the first information, receives the SIB sent by the target access object.

10. The method according to claim 8, wherein: The method further comprises: Initiating, by the terminal, the first operation to the target access object; The target access object is a second access object, and the 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, after the second timer times out, the terminal initiating the first operation to the target access object; A time slots / symbols / milliseconds after sending the WUS to the target access object, the terminal initiating the first operation to the target access object; After receiving the feedback of the WUS for the target access object B time slots / symbols / milliseconds, the terminal initiates the first operation to the target access object.

11. 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 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.

12. The method according to claim 11, wherein: The first information corresponds to at least one second access object in the second access object group, and the first information 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; triggering the at least one second access object to send WUS configuration information of the SIB, or triggering the at least one second access object to adaptively adjust the SIB of the WUS configuration information; 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 SIB 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; SIB configuration information sent by WUS after successful triggering; Configuration information related to RACH monitoring after successful triggering by WUS; The characteristic information of the at least one second access object itself.

13. The method according to claim 12, 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 SSB / SIB, or triggering WUS configuration information for SSB / SIB 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 triggering WUS configuration information for 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 sent by the terminal when a first condition is met, and the WUS is used to trigger the target access object to send at least one of an SSB, a SIB, and monitor a RACH, 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.

14. The method according to claim 13, wherein: The target access object receives a wake-up signal WUS, including: The target access object has a first WUS, where the first WUS is used to trigger the target access object to send an SSB and / or send an SIB; The target access object has a second WUS, wherein the second WUS is used to trigger the target access object to monitor RACH.

15. 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; 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 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.

16. The device 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 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; triggering the at least one second access object to send WUS configuration information of the SIB, or triggering the at least one second access object to adaptively adjust the SIB of the WUS configuration information; 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 SIB 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; SIB configuration information sent by WUS after successful triggering; Configuration information related to RACH monitoring after successful triggering by WUS; The characteristic information of the at least one second access object itself.

17. The device according to claim 15, 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 sends the SIB normally; Whether the second access object satisfies at least two of normal RACH monitoring, normal SSB transmission, and normal SIB 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.

18. 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 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.

19. The device according to claim 18, wherein: The first information corresponds to at least one second access object in the second access object group, and the first information 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; triggering the at least one second access object to send WUS configuration information of the SIB, or triggering the at least one second access object to adaptively adjust the SIB of the WUS configuration information; 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 SIB 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; SIB configuration information sent by WUS after successful triggering; Configuration information related to RACH monitoring after successful triggering by WUS; The characteristic information of the at least one second access object itself.

20. 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 10 are implemented.

21. 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 11 to 14 are implemented.

22. A readable storage medium storing a program or instruction, wherein the program or instruction, when executed by a processor, implements the random access method according to any one of claims 1 to 10, or implements the steps of the communication method according to any one of claims 11 to 14.

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