Random access and communication method, device and equipment

Abstract

The invention discloses a random access and communication method, device and equipment, and belongs to the technical field of communication, the random access method disclosed by the embodiment of the invention comprises the following steps: a terminal receives first information about a second access object group sent by network side equipment through a first access object, the second access object group comprises one or more second access objects different from the first access object, and the first information comprises system information SIB of the second access objects; and the terminal selects, according to the first information and a first rule, a target access object for executing a first operation from the first access object and the second access object group, the first operation comprising residence or random access, and the access object comprising one of a carrier, a cell and a bandwidth part BWP.

Description

Technical Field

[0001] This application belongs to the field of communication technologies, and particularly relates to a random access, communication method, device, and equipment. Background Art

[0002] To enhance the network-side capacity, the network side has introduced multiple access objects (such as multi-carrier / multi-cell). Currently, in the multi-carrier scenario, there are two random access schemes: one is that each carrier is independent, and the base station sends one or more of synchronization signals or physical broadcast channel blocks (SSB), system information block 1 (SIB1), and paging on each carrier. The user equipment (UE) can select any carrier for random access based on this information. However, in this random access scheme, since all carriers are always transmitting signals, the energy consumption of the network side is very high. The other is for the carrier aggregation (CA) scenario. In this scenario, the base station only sends SIB1 and paging on the primary carrier (or primary cell (PCell)). Correspondingly, the UE can only perform random access on the primary carrier / primary cell (PCell). Although this random access scheme can reduce the energy consumption of the network side, at the same time, because all UEs perform random access on the primary carrier, it causes congestion on the network side, and the probability of random access failure also increases accordingly.

[0003] Furthermore, to avoid the problems existing in the above two random access schemes, the network side differentiates carriers. Some carriers normally send at least one of SSB, SIB1, and paging, while some other carriers do not send. For the carriers that do not send this information, the UE can refer to the carriers that send this information to achieve random access. However, this reference needs to meet certain conditions. For example, the carriers for mutual reference must be intra-band carriers / intra-band cells, or the carriers for mutual reference must be collocated carriers / collocated cells. If these conditions are not met, the carriers that do not send the above information still need to send normally, which makes the energy consumption of the network side still relatively high.

[0004] Therefore, in the multi-access object scenario, how to achieve random access of the UE while saving energy for the network side and ensuring the network-side capacity to the greatest extent possible is still a technical problem to be urgently solved. Summary of the Invention

[0005] An embodiment of the present application provides a random access, communication method, apparatus, and device to maximize the capacity of the network side while saving energy for the network side.

[0006] In a first aspect, a random access method is provided. The method includes:

[0007] A terminal receives first information about a second access object group sent by a network-side device through a first access object, where the second access object group includes one or more second access objects different from the first access object, and the first information includes the system information SIB of the second access object.

[0008] The terminal selects 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 a first rule, where the first operation includes camping or random access, and the access object includes one of a carrier, a cell, and a bandwidth part BWP.

[0009] In a second aspect, a communication method is provided. The method includes:

[0010] A network-side device sends first information about a second access object group to a terminal through a first access object, where the second access object group includes one or more second access objects different from the first access object, the first information includes the system information SIB of the second access object, and the first information is used for the terminal to select a target access object for performing a first operation, where the first operation includes camping or random access, and the access object includes one of a carrier, a cell, and a bandwidth part BWP.

[0011] In a third aspect, a random access apparatus in a multi-carrier scenario is provided. The apparatus includes:

[0012] 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, where the second access object group includes one or more second access objects different from the first access object, and the first information includes the system information SIB of the second access object;

[0013] An access object selection module, configured 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 a first rule, where the first operation includes camping or random access, and the access object includes one of a carrier, a cell, and a bandwidth part BWP.

[0014] In a fourth aspect, a communication apparatus is provided. The apparatus includes:

[0015] An information sending module, configured to send, to a terminal via a first access object, first information about a second access object group, where the second access object group includes one or more second access objects different from the first access object, the first information includes system information SIB of the second access object, and the first information is used for the terminal to select a target access object for performing a first operation, where the first operation includes camping or random access, and the access object includes one of a carrier, a cell, and a bandwidth part BWP.

[0016] In a fifth aspect, a terminal is provided, which includes a processor and a memory. The memory stores a program or instruction that can run on the processor. When the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0017] In a sixth aspect, a terminal is provided, which includes a processor and a communication interface. The communication interface is configured to receive first information about a second access object group sent by a network-side device via a first access object, where the second access object group includes one or more second access objects different from the first access object, the first information includes system information SIB of the second access object, and the processor is configured to select, according to the first information and a first rule, a target access object for performing a first operation in the first access object and the second access object group, where the first operation includes camping or random access.

[0018] In a seventh aspect, a network-side device is provided, which includes a processor and a memory. The memory stores a program or instruction that can run on the processor. When the program or instruction is executed by the processor, the steps of the method described in the second aspect are implemented.

[0019] In an eighth aspect, a network-side device is provided, which includes a processor and a communication interface. The communication interface is configured to send, to a terminal via a first access object, first information about a second access object group, where the second access object group includes one or more second access objects different from the first access object, the first information includes system information SIB of the second access object, and the first information is used for the terminal to select a target access object for performing a first operation, where the first operation includes camping or random access.

[0020] In a ninth aspect, a communication system is provided, which includes: a terminal and a network-side device. The terminal can be used to execute the steps of the random access method described in the first aspect, and the network-side device can be used to execute the steps of the communication method described in the second aspect.

[0021] In a tenth aspect, a readable storage medium is provided, on which a program or instructions are stored. When the program or instructions are 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.

[0022] In an eleventh aspect, a chip is provided, which includes a processor and a communication interface. The communication interface is coupled to the processor, and the processor is configured to run a program or instructions to implement the method described in the first aspect, or to implement the method described in the second aspect.

[0023] In a twelfth aspect, a computer program / program product is provided. The computer program / program product is stored in a storage medium, and the computer program / program product is executed by at least one processor to implement the steps of the method described in the first aspect or the second aspect.

[0024] In the embodiments 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, and the first information includes the system information SIB of the second access object, the terminal can select the target access object to camp on or perform random access from the first access object and the second access object group according to the first information and the first rule, without the second access object continuously sending information such as SSB and SIB all the time. Therefore, while saving energy on the network side, the capacity of the network side can be guaranteed to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a block diagram of a wireless communication system provided by an embodiment of the present application.

[0026] Figure 2 is a schematic flow chart of a random access method provided by an embodiment of the present application.

[0027] Figure 3 is a schematic flow chart of a random access method provided by another embodiment of the present application.

[0028] Figure 4 is a schematic flow chart of a random access method provided by another embodiment of the present application.

[0029] Figure 5 is a schematic flow chart of a random access method provided by another embodiment of the present application.

[0030] Figure 6 is a schematic diagram of WUS resource configuration provided by an embodiment of the present application.

[0031] Figure 7 is a schematic diagram of WUS resource configuration provided by another embodiment of the present application.

[0032] Figure 8 It is a schematic diagram of WUS resource configuration provided by another embodiment of the present application.

[0033] Figure 9 It is a schematic flow diagram of a communication method provided by an embodiment of the present application.

[0034] Figure 10 It is a schematic structural diagram of a random access device provided by an embodiment of the present application.

[0035] Figure 11 It is a schematic structural diagram of a random access device provided by another embodiment of the present application.

[0036] Figure 12 It is a schematic structural diagram of a random access device provided by another embodiment of the present application.

[0037] Figure 13 It is a schematic structural diagram of a random access device provided by another embodiment of the present application.

[0038] Figure 14 It is a schematic structural diagram of a communication device provided by an embodiment of the present application.

[0039] Figure 15 It is a schematic structural diagram of a communication device of the present application.

[0040] Figure 16 Schematic diagram of the hardware structure of the terminal in the embodiment of the present application.

[0041] Figure 17 Schematic diagram of the hardware structure of the network-side device in the embodiment of the present application. Detailed implementation manners

[0042] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. According to the embodiments of the present application, every other embodiment obtained by those of ordinary skill in the art belongs to the scope protected by the present application.

[0043] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are usually of the same type, and the number of objects is not limited. For example, the first access object can be one or multiple. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0044] It should be noted 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, and 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 described technology can be used in the above-mentioned systems and radio technologies, as well as in other systems and radio technologies. The following description describes the New Radio (NR) system for example purposes, and the NR term is used in most of the following descriptions, but these technologies can also be applied to applications other than NR system applications, such as the 6th Generation (6 th Generation, 6G) communication system.

[0045] Figure 1The block diagram of a wireless communication system to which the embodiments of the present application can be applied is shown. The wireless communication system includes a terminal 11 and a network-side device 12. Among them, the terminal 11 can 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 (home devices with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.), a game console, a personal computer (PC), a teller machine or a self-service machine, etc. The wearable device includes: a smart watch, a smart bracelet, a smart earphone, a smart glasses, a smart jewelry (smart bracelet, smart bracelet, smart ring, smart necklace, smart anklet, smart ankle chain, etc.), a smart wristband, a smart clothing, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present application. The network-side device 12 may include an access network device or a core network device. Among them, 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 some other suitable term in the art. As long as the same technical effect is achieved, the base station is not limited to a specific technical term. It should be noted that in the embodiments of the present application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.

[0046] In order to save energy for the network side while ensuring the capacity of the network side to the greatest extent possible, the embodiments of the present application propose a random access method, apparatus, and terminal, as well as a communication method, apparatus, and network side device, which will be described in detail below with reference to the accompanying drawings.

[0047] First, a random access method proposed by the embodiments of the present application will be described.

[0048] As Figure 2 shown, a random access method proposed by the embodiments of the present application may include:

[0049] Step 201, the terminal receives first information about a second access object group sent by the network side device through a first access object, where the second access object group includes one or more second access objects different from the first access object, and the first information includes the system information block (SIB) of the second access object, and the access object includes one of a carrier, a cell, and a bandwidth part (BWP).

[0050] Among them, the access object may include one of a carrier, a cell, and a bandwidth part (BWP). The random access method proposed by the embodiments of the present application is for a multi-access object scenario, and the multi-carrier scenario will be mainly used as an example for illustration below.

[0051] In one implementation, in a multi-carrier scenario, the first access object may be an anchor carrier, and the second access object may be a non-anchor carrier. On the anchor carrier, the UE can obtain the system information of the anchor carrier and the necessary system information of other non-anchor carriers. And the UE can perform at least one of random access (Random Access Channel, RACH), data transmission, and data reception on any anchor carrier and non-anchor carrier based on the system information obtained from the anchor carrier.

[0052] In another implementation, in a multi-carrier scenario, the first access object may be a carrier that normally transmits the synchronization signal block (SSB), and the second access object may be a carrier that does not transmit the SSB (SSB-less carrier), or the second access object is a carrier that supports on-demand transmission of the SSB (on-demand SSB carrier).

[0053] In the embodiments of the present application, the SSB includes at least one of a Synchronization Signal Block (SSB) and a Physical Broadcast Channel block.

[0054] A random access method provided by the embodiments of the present application is applicable to a scenario where a network-side device configures System Information Block (SIB) of a second access object on a first access object (i.e., the SIB of the second access object is included in the first information). These scenarios may include:

[0055] Scenario 0: The SIBs of all second access objects in a second access object group are configured on the first access object. All second access objects in the second access object group do not send SIBs, but normally send SSBs and perform normal Random Access Channel (RACH) monitoring.

[0056] Scenario 1: The SIBs of all second access objects in a second access object group are configured on the first access object. All second access objects in the second access object group do not send SIBs, do not send SSBs or send energy-saving SSBs, with the first access object as a reference, and perform normal RACH monitoring.

[0057] Scenario 2: The SIBs of all second access objects in a second access object group and a Wake-Up Signal (WUS) configuration for triggering SSB transmission are configured on the first access object. All second access objects in the second access object group do not send SIBs, do not send SSBs, but perform normal RACH monitoring.

[0058] Scenario 3: The SIBs of all second access objects in a second access object group and a WUS configuration for triggering RACH monitoring are configured on the first access object. All second access objects in the second access object group do not send SIBs, and all send or do not send SSBs (with the first access object as a reference carrier), and do not perform normal RACH monitoring.

[0059] Scenario 4: The SIBs of all second access objects in a second access object group and a WUS configuration for triggering SSB transmission and RACH monitoring are configured on the first access object. All second access objects in the second access object group do not send SIBs, do not send SSBs, and do not perform normal RACH monitoring.

[0060] Wherein, the first information may be sent by the first access object through a broadcast message; or it is defaulted that the first information is the same as the corresponding information of the first access object.

[0061] Among them, the system information of the second access object included in the first information includes at least one of the following:

[0062] All or part of the SIBs of the second access object, where the part of the SIBs may include at least one of the following: Public Land Mobile Network (PLMN) information, relevant configuration information of cell selection criteria, relevant configuration information of cell reselection criteria, and cell bar information;

[0063] The status information of System Information Block1 (SIB1) of the second access object, and the SIB1 status information includes at least one of not sending SIB1 and SIB1 being carried by the system information of the first access object.

[0064] Among them, the first information corresponds to at least one second access object in the second access object group, and the first information further includes at least one of the following:

[0065] 1) The Wake-up Signal (WUS) configuration information for triggering at least one of the second access objects to send the SSB, or the WUS configuration information for triggering at least one of the second access objects to perform SSB adaptation;

[0066] 2) The WUS configuration information for triggering the RACH listening of at least one of the second access objects, or the WUS configuration information for triggering the RACH adaptation of at least one of the second access objects;

[0067] 3) The relevant configuration information of the SSB currently being sent by at least one of the second access objects, which may specifically include at least one of the following:

[0068] Whether at least one of the second access objects is sending the SSB;

[0069] At least one of the frequency point of the SSB being sent by at least one of the second access objects, the SSB transmission period, and the number of SSBs within one transmission period;

[0070] The transmission mode of the SSB being transmitted by the at least one second access object, where the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, a compact transmission mode, a long-cycle transmission mode (with a long transmission cycle of the SSB), and an on-demand transmission mode. Among them, the energy-saving transmission mode can be a simplified transmission mode that only transmits the Primary Synchronization Signal (PSS) and the Secondary Synchronization Signal (SSS), and the compact transmission mode can be a transmission mode where there is no time-domain gap between multiple SSBs.

[0071] 4) The relevant configuration information of the RACH listening behavior of the at least one second access object currently, which may specifically include at least one of the following:

[0072] Whether the at least one second access object performs RACH listening;

[0073] At least one of the transmission cycle of the RACH being listened to by the at least one second access object, the number of RACHs within one transmission cycle, the RACH frequency-domain resource configuration information, and the RACH time-domain resource configuration information;

[0074] The listening mode of the at least one second access object for listening to the RACH, where the listening mode includes one of a normal listening mode, a simplified listening mode (such as reduced RO opportunity), a compact listening mode, and an on-demand listening mode. Among them, the simplified listening mode may include reduced RO opportunity, and the compact listening mode can be a listening mode where there is no time-domain gap between multiple ROs. RO is short for Physical Random Access Channel Occasion.

[0075] 5) The relevant configuration information of the SSB transmitted after being successfully triggered by WUS, which may specifically include at least one of the following:

[0076] After being successfully triggered by WUS, at least one of the frequency point of the SSB transmitted by the at least one second access object, the transmission cycle of the SSB, and the number of SSBs within one transmission cycle;

[0077] After being successfully triggered by WUS, the listening window of the SSB transmitted by the at least one second access object, that is, the UE listens to the SSB within this listening window;

[0078] After the successful triggering of WUS, the at least one time domain resource index or the location of at least one time domain resource where the at least one second access object actually sends the SSB;

[0079] After the successful triggering of WUS, at least one of the transmission time length for the at least one second access object to send the SSB, the number of SSB transmissions, and the number of SSB transmission periods;

[0080] After the successful triggering of WUS, 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 time domain, frequency domain, and spatial domain;

[0081] After the successful triggering of WUS, the time domain resource position of the first SSB sent by the at least one second access object, for example, it is sent in the nearest SSB period of X time slots / symbols after the triggering signal (WUS) transmission time;

[0082] After the successful triggering of WUS, the transmission mode for the at least one second access object to send the SSB, and the transmission mode includes one of normal transmission mode, energy-saving transmission mode (for example, only sending PSS and SSS), aggregated transmission mode (for example, there is no time domain interval between multiple SSBs), long-period transmission mode (the SSB period is longer), and on-demand transmission mode.

[0083] 6) Related configuration information for RACH listening after the successful triggering of WUS, specifically, it may include:

[0084] After the successful triggering of WUS, at least one of the period for the at least one second access object to listen to RACH, the number of RACHs listened to, the frequency domain resource configuration information for listening to RACH, the time domain resource configuration information for listening to RACH, and the listening mode for listening to RACH, where the listening mode includes one of normal listening mode, simplified listening mode (for example, reducing the RO opportunity), aggregated listening mode (there is no time domain interval between multiple ROs), and on-demand listening mode.

[0085] 7) Characteristic information of the at least one second access object itself, specifically, it may include at least one of the following:

[0086] The identification information of the at least one second access object;

[0087] Whether the at least one second access object can use the first access object as a reference access object;

[0088] Whether the at least one second access object is co-located with the first access object;

[0089] Whether the at least one second access object is in the same Timing Advance Group (TAG) as the first access object;

[0090] Whether the at least one second access object has a Quasi CoLocation (QCL) relationship with the first access object;

[0091] The reference access object of the at least one second access object;

[0092] The access object co-located with the at least one second access object;

[0093] The access object in the same TAG as the at least one second access object;

[0094] The access object having a QCL relationship with the at least one second access object;

[0095] Whether the at least one second access object is in a barred state;

[0096] The priority of the at least one second access object when the UE performs random access channel selection;

[0097] Whether the at least one second access object is set to the barred state for the first type of UE, where the first type includes at least one of Reduced Capability (Redcap), Non-Terrestrial Network (NTN), and Network Energy Saving (NES) function;

[0098] The eigenvalue N of the UE ID allowed for random access by the at least one second access object. For example, a UE with UE ID mod carrier number = N can perform random access on this carrier;

[0099] Whether the at least one second access object supports UE residence;

[0100] Whether the at least one second access object is a suitable cell;

[0101] Whether the at least one second access object supports cell selection and / or cell reselection.

[0102] Wherein, the WUS configuration information included in the first information may include at least one of the following:

[0103] 1) Synchronization reference configuration information of WUS, which may specifically include at least one of the following:

[0104] At least one of the SSB, Channel State Information-Reference Signal (CSI-RS), and tracking reference signal (TRS) of the first access object;

[0105] GPS timing.

[0106] 2) Resource configuration information of the WUS, which may specifically include at least one of the following:

[0107] Time-domain resource information;

[0108] Frequency-domain resource information;

[0109] Signal sequence configuration information. For example, the preamble group may specifically indicate the preamble group index, indicating that this group of preambles is used to trigger the SSB of the at least one second access object.

[0110] 3) Power configuration information of the WUS, which may specifically include at least one of the following:

[0111] Initial signal power;

[0112] Signal power ramp step.

[0113] 4) Repetition transmission configuration information of the WUS, which may specifically include at least one of the following:

[0114] Number of repetitions for a single signal transmission;

[0115] Maximum number of repetitions for channel transmission.

[0116] 5) Spatial domain parameter configuration information of the WUS, which may specifically include at least one of the following:

[0117] Correspondence between the WUS and the SSB of the first access object;

[0118] Correspondence between the WUS and the SSB of the at least one second access object;

[0119] Correspondence between the WUS and the SSB of the second access object group.

[0120] 6) Transmission timer configuration information of the WUS. The timer is used to avoid overly frequent WUS transmissions. Generally, the timer is started after the WUS is sent, and repeated WUS transmissions are not allowed before the timer expires.

[0121] Among them, the form of the WUS signal includes at least one of the following:

[0122] RACH;

[0123] Msg1;

[0124] Preamble;

[0125] Sounding Reference Signal (SRS);

[0126] Physical Uplink Control Channel (PUCCH).

[0127] Wherein, the configuration method of the resource configuration information of the WUS includes at least one of the following:

[0128] Configure a signal resource list in the first information, each element of the signal resource list corresponds one-to-one with the second access object or the index size of the second access object group, and one element in the signal resource list includes one or more resources;

[0129] Configure a signal resource list in the first information, and each element of the signal resource list corresponds explicitly to the second access object or the second access object group index;

[0130] Configure a candidate resource set in the first information, one or more resources in the candidate resource set correspond to a resource number, and one resource number corresponds to the index of one second access object or one second access object group, and the resource number is determined according to at least one of time domain, frequency domain and spatial domain;

[0131] Configure one or more signal resources for the second access object or the second access object group in the first information.

[0132] Wherein, the signal resources configured by the resource configuration information of the WUS include at least one of the following:

[0133] 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, share the same video resources with the common RACH on the first access object;

[0134] The time-frequency resources are the time-frequency resources of the dedicated RACH on the first access object or the second access object group dedicated to triggering SSB transmission and / or RACH listening. Among them, the time-frequency resources of this dedicated RACH can be completely different from the time-frequency resources of the common RACH on the first access object, or can be partial resources of the time-frequency resources of the common RACH on the first access object;

[0135] The time-frequency resource is the time-frequency resource of dedicated SRS / PUCCH for triggering SSB transmission and / or RACH listening on the first access object or the second access object group.

[0136] Among them, the grouping method of the second access object group includes at least one of the following:

[0137] Configured by the network-side device;

[0138] Specified by the protocol.

[0139] Among them, the grouping rules of the second access object group include at least one of the following:

[0140] The second access objects in the same frequency band (band) are grouped into one group;

[0141] The second access objects in the same frequency band interval are grouped into one group;

[0142] The second access objects with at least one of the Initial BWP, active BWP, SSB, and SCS being the same are grouped into one group;

[0143] The second access objects with the same transmission mode are grouped into one group, where the transmission mode is related to at least one of the following: whether to transmit SSB, whether to perform RACH listening, and whether to support on-demand SSB, etc.;

[0144] The co-located second access objects are grouped into one group;

[0145] The second access objects with the same SSB transmission period are grouped into one group.

[0146] Step 202: 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, where the first operation includes camping or random access.

[0147] Among them, the first rule may be related to at least one of the following:

[0148] One or more access objects that the network-side device indicates or configures for the terminal to randomly access;

[0149] By default, the access object for the terminal to randomly access is the first access object;

[0150] The Bar status information of the second access object;

[0151] The index value of the second access object;

[0152] The center frequency of the second access object;

[0153] The sub - carrier spacing (SCS) of the second access object;

[0154] The identifier of the second access object;

[0155] The frequency interval between the second access object and the first access object;

[0156] Whether the second access object performs normal RACH listening;

[0157] Whether the second access object normally transmits SSB;

[0158] Whether the second access object meets the conditions for normal RACH listening and normal SSB transmission;

[0159] The number of times WUS needs to be sent to the second access object;

[0160] The priority of the second access object;

[0161] The measured signal strength value of the reference signal of the second access object, where the signal strength includes at least one of the reference signal receiving power (RSRP) and the signal - to - interference - plus - noise ratio (SINR);

[0162] The randomly generated access object index;

[0163] The weight value of the second access object;

[0164] The randomly generated access object weight value;

[0165] Whether the first access object is a suitable cell;

[0166] Whether the second access object is a suitable cell.

[0167] Among them, the priority of the second access object can 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:

[0168] ① The transmission mode of the second access object, where the transmission mode includes one of whether to normally transmit SSB, whether to support on - demand SSB transmission, and whether to normally listen to RACH. For example, the relationship between the priority of the second access object and the transmission mode can be:

[0169] Priority 0: Transmit the SSB normally and monitor the RACH normally;

[0170] Priority 1: Do not transmit the SSB normally (refer to the SSB of the first access object), and monitor the RACH normally;

[0171] Priority 2: Transmit the SSB on - demand, and monitor the RACH normally;

[0172] Priority 3: Transmit the SSB normally and do not monitor the RACH normally;

[0173] Priority 4: Do not transmit the SSB normally (refer to the SSB of the first access object) and do not monitor the RACH normally;

[0174] Priority 5: Transmit the SSB on - demand and do not monitor the RACH normally.

[0175] It should be noted that in the above examples, the smaller the priority value, the higher the priority.

[0176] ② The frequency band interval between the second access object and the first access object;

[0177] ③ The number of the second access object.

[0178] The following gives two examples to illustrate how to select the target access object for performing the first operation according to the first information and the first rule in step 202 among the first access object and the second access object group. There will be other examples in the specific embodiments below, which will not be elaborated here for the time being. See the following for details.

[0179] The first example

[0180] Selecting the target access object for performing the first operation according to the first information and the first rule among the first access object and the second access object group may include:

[0181] Determine whether the first access object is a suitable cell;

[0182] When the first access object is a suitable cell, select the first access object as the target access object;

[0183] When the first access object is not a suitable cell, perform the first step or the second step;

[0184] Among them, the first step includes:

[0185] Determine whether the at least one second access object is a suitable cell according to the measurement results of the reference signals corresponding to at least one second access object in the second access object group and the partial or all SIBs of the at least one second access object included in the first information;

[0186] In the case where one or more second access objects among the at least one second access object are suitable cells, select a suitable cell from the at least one second access object as the target access object for performing the first operation according to the first rule.

[0187] Wherein, the second step includes:

[0188] Ignore the second access object and find other suitable cells as the target access object for performing the first operation.

[0189] Further, the finding other suitable cells as the target access object for performing the first operation may include:

[0190] Find a suitable cell from one or more second access objects in the second access object group as the target access object for performing the first operation;

[0191] Find a suitable cell from one or more third access objects in the third access object group as the target access object for performing the first operation, wherein the third access object group includes access objects in the second access object group that meet the third condition.

[0192] Wherein, the third condition may include at least one of the following:

[0193] Taking the first access object as a reference;

[0194] Collocated with the first access object;

[0195] Being continuous access objects on the same frequency band as the first access object.

[0196] The second example

[0197] The selecting the target access object for performing the first operation from the first access object and the second access object group according to the first information and the first rule may include:

[0198] Determine whether the first access object is a suitable cell according to the SSB measurement results sent by the first access object and the SIB of the first access object;

[0199] Determine whether the at least one second access object is a suitable cell according to the reference signal measurement result corresponding to at least one second access object in the second access object group and the partial or all SIBs of the at least one second access object included in the first information;

[0200] In the case that the first access object is a suitable cell and one or more second access objects in the at least one second access object are suitable cells, select a suitable cell from the first access object and the at least one second access object as the target access object for performing the first operation according to the first rule.

[0201] In the embodiment of the present application, the 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 there is an SSB sent on the second access object, directly perform SSB measurement on the second access object to obtain the SSB measurement result; if there is no SSB sent on the second access object, use the SSB measurement result sent on the fourth access object as the SSB measurement result of the second access object, where 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, or an access object in the same frequency band as the second access object and continuous with each other. Or, if there is no SSB sent on the second access object, use the measurement result of the SSB sent by the second access object after the WUS trigger is successful as the SSB measurement result of the second access object.

[0202] Figure 2 In a random access method provided by the shown embodiment, since the network-side device can provide the first information about the second access object group to the terminal through the first access object, the first information includes the system information SIB of the second access object, and the terminal can select the target access object to perform residence or random access from the first access object and the second access object group according to the first information and the first rule, without the second access object continuously sending information such as SSB and SIB all the time, but sending SSB on demand or performing RACH listening on demand. Therefore, while saving energy on the network side, the capacity of the network side can be guaranteed to the greatest extent.

[0203] Optionally, the target access object belongs to the second access object group, the first information includes wake-up signal WUS configuration information for triggering at least one second access object to send an SSB, or WUS configuration information for triggering SSB adaptation adjustment of at least one second access object, and the first information includes WUS configuration information for triggering at least one second access object to listen on the random access channel RACH, or WUS configuration information for triggering RACH listening adaptation adjustment of at least one second access object. After step 202 and before performing the first operation on the target access object, as Figure 3 As shown, a random access method provided by an embodiment of the present application may further include:

[0204] Step 203, the terminal sends a wake-up signal WUS for the target access object, where the WUS is used to trigger the target access object to send at least one of an SSB and listen on the RACH.

[0205] In one example, the terminal sending the WUS for the target access object includes: when a first condition is met, the terminal sends the WUS for the target access object.

[0206] Wherein, the first condition may include at least one of the following:

[0207] 1) The first access object is not a suitable cell;

[0208] 2) The target access object is a suitable cell;

[0209] 3) Intra-frequency or inter-frequency measurement is performed on the target access object;

[0210] 4) The target access object is in a first energy-saving state, where the first energy-saving state includes at least one of not sending an SSB, not sending an SIB, not listening on the RACH, sending an energy-saving SSB (such as a Sparse SSB), sending an energy-saving SIB (such as a Sparse SIB), and energy-saving listening on the RACH (such as Sparse RACH monitoring), and the energy-saving SSB includes one of a lightweight SSB, a simplified SSB, a sparse SSB, and a long-period SSB;

[0211] 5) The terminal is sensitive to access latency;

[0212] 6) The terminal is in the process of recovering from a link failure.

[0213] In another example, before sending the WUS for the target access object, the method may further include: assuming that the target access object is in a second energy-saving state.

[0214] Wherein, the second energy-saving state may include at least one of the following:

[0215] Not sending SIB, normally sending SSB, and performing normal RACH monitoring;

[0216] Not sending SIB, not sending SSB or sending an energy-saving SSB (such as a simplified SSB or a sparse SSB, etc.), using the first access object as a reference, and performing normal RACH monitoring;

[0217] Not sending SIB, normally sending SSB, and not performing normal RACH monitoring;

[0218] Not sending SIB, not sending SSB or sending an energy-saving SSB (such as a simplified SSB or a sparse SSB, etc.), and not performing normal RACH monitoring.

[0219] In the first example, the terminal sending the WUS for the target access object may include: the terminal sending one WUS for the target access object, and this WUS can be used to achieve two purposes: one is to trigger the target access object to send SSB, and the other is to trigger the target access object to monitor RACH.

[0220] In the second example, the terminal sending the WUS for the target access object may include: the terminal sending a first WUS for the target access object, and the first WUS is used to trigger the target access object to send SSB; and the terminal sending a second WUS for the target access object, wherein the second WUS is used to trigger the target access object to monitor RACH.

[0221] Exemplarily, the terminal sending the second WUS for the target access object (the time point of sending the second WUS) includes one of the following:

[0222] After Z time slots / symbols / milliseconds of sending the first WUS, the terminal starts to send the second WUS for the target access object;

[0223] After X time slots / symbols / milliseconds of receiving the feedback for the first WUS, the terminal starts to send the second WUS for the target access object;

[0224] Y slots / symbols / milliseconds after receiving the first SSB sent by the successfully triggered target access object, the terminal starts to send a second WUS for the target access object;

[0225] When the number of transmissions of the first WUS reaches the maximum value, the terminal sends a second WUS for the target access object;

[0226] After sending the first WUS, a first timer is started. After the first timer expires, the terminal sends a second WUS for the target access object.

[0227] Figure 3 A random access method provided by the illustrated embodiment, the terminal can trigger the second access object to send an SSB or perform RACH listening on demand, rather than continuously sending an SSB or continuously performing RACH listening, nor never sending an SSB or never performing RACH listening. Therefore, while saving energy for the network-side device, the network-side capacity can be guaranteed to the greatest extent.

[0228] Optionally, when the WUS is used to trigger SSB transmission, as Figure 4 shown, a random access method provided by an embodiment of the present application may further include:

[0229] The terminal listens for the SSB sent by the target access object.

[0230] It should be noted that whether the UE sends one WUS or two WUSs (the first WUS and the second WUS above) for the target access object, the UE can listen for the position of the SSB. Specifically, when the UE sends one WUS for the target access object, the UE listens for the position of the SSB after sending the WUS; when the UE sends two WUSs (the first WUS and the second WUS above) for the target access object, the UE can listen for the position of the SSB after sending the first WUS.

[0231] Specifically, the time point (when listening for the SSB sent by the target access object) for the terminal to listen for the SSB sent by the target access object may include one of the following:

[0232] After sending the WUS, a third timer is started. After the third timer expires, the terminal starts to listen for the SSB sent by the target access object;

[0233] C slots / symbols / milliseconds after sending the WUS, the terminal starts to listen for the SSB sent by the target access object;

[0234] In the next time slot after sending the WUS, the terminal starts to listen for the SSB sent by the target access object;

[0235] Within the SSB listening window configured in the first information, the terminal listens for the SSB sent by the target access object.

[0236] Figure 4 A random access method provided by the illustrated embodiment, the terminal can trigger a target access object (a second access object) to send an SSB on-demand, thereby preparing for RACH on the target access object and increasing the capacity of the network side.

[0237] Optionally, as Figure 5 shown, a random access method provided by an embodiment of the present application may further include:

[0238] Step 205, the terminal initiates the first operation to the target access object.

[0239] In the case where the UE sends a WUS to the target access object, the UE initiates the first operation to the target access object after sending the WUS; in the case where the UE sends two WUSs (the above-mentioned first WUS and the above-mentioned second WUS) to the target access object, the UE may initiate the first operation to the target access object after sending the second WUS. Specifically, the target access object is a second access object, and step 205 (the time point of initiating the first operation to the target access object) may specifically include one of the following:

[0240] Start a second timer after sending the WUS to the target access object. After the second timer expires, the terminal initiates the first operation to the target access object (such as initiating RACH. Correspondingly, the WUS may be the same WUS for triggering SSB sending and RACH listening, or the above-mentioned second WUS);

[0241] After 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. Correspondingly, the WUS may be the same WUS for triggering SSB sending and RACH listening, or the above-mentioned second WUS);

[0242] After B time slots / symbols / milliseconds after receiving the feedback of the WUS for the target access object, the terminal initiates the first operation to the target access object (such as initiating RACH. Correspondingly, the WUS may be the same WUS for triggering SSB sending and RACH listening, or the above-mentioned second WUS).

[0243] Optionally, a random access method provided by an embodiment of the present application may further include:

[0244] When the second condition is satisfied, the terminal sends a wake-up signal WUS for the target access object again.

[0245] Wherein, the second condition may include but is not limited to at least one of the following:

[0246] 1) SSB detection fails;

[0247] 2) The number of random access attempts reaches the maximum value;

[0248] The number of times of sending WUS is less than or equal to the preset maximum number of sending times;

[0249] 3) No feedback for the previous WUS is received;

[0250] 4) The previous WUS is used to trigger the sending of SSB. After receiving the feedback for the previous WUS signal, a WUS for triggering RACH listening is sent again (that is, sending WUS again is to trigger RACH listening);

[0251] 5) No feedback for the previous WUS is received before the timer times out.

[0252] Optionally, the re-sent WUS signal has at least one of the following characteristics:

[0253] 1) The signal power increases;

[0254] 2) The time interval from the previous WUS is greater than the preset time interval;

[0255] 3) The frequency domain resources and sequence resources are the same as those of the previous WUS.

[0256] It should be noted that, in the embodiments of the present application, trigger SSB sending, trigger SSB adaptation, trigger normal SSB sending, trigger SSB to return to the normal sending mode, etc. have the same meaning, and all represent triggering the second access object to change from an abnormal SSB transmission mode (long-period SSB sending mode, simplified SSB sending mode, or on-demand SSB sending mode) to a normal SSB transmission mode.

[0257] It should also be noted that, in the embodiments of the present application, SIB1 and SIB both refer to the System Information Block, and SIB1 is an example of SIB.

[0258] The following describes the application of a random access method provided in an embodiment of the present application in conjunction with specific embodiments.

[0259] Embodiment 1

[0260] Assume that: on the first access object in operation of the terminal - the first carrier Cell 0 (anchor carrier), the terminal obtains the first information of the second access object group - Cells 1, 2, and 3 in the second carrier group, that is, the system information of the second carrier group is included in the SIB of the first carrier.

[0261] In the scenario 0 mentioned above (the second carrier normally sends SSB and performs normal RACH monitoring), the SIB corresponding to each second carrier in the second carrier group is configured on the first carrier, and all second carriers in the second carrier group normally send SSB and perform normal RACH monitoring. Specifically:

[0262] Cell 0: belongs to band0 (anchor carrier), normally sends SSB, and the SIB of the remaining carriers (Cells 1, 2, and 3) will be carried in the SIB;

[0263] Cell 1: belongs to Band 1, normally sends SSB and performs normal RACH monitoring, and does not send SIB1

[0264] Cell 2: belongs to Band 1, normally sends SSB and performs normal RACH monitoring, and does not send SIB1

[0265] Cell 3: belongs to Band 2, normally sends SSB and performs normal RACH monitoring, and does not send SIB1

[0266] In an example, the first information about the second carrier group sent by the network side device through the first carrier may include: the SIB of each second carrier in the second carrier group.

[0267] Wherein, the SIB of the second carrier included in the first information may include at least one of the following:

[0268] All or part of the SIB of the second carrier, where the part of the SIB may include 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 bar information;

[0269] The SIB1 status information of the second carrier, where the SIB1 status information includes at least one of not sending SIB1 and SIB1 being carried by the system information of the first carrier.

[0270] In one example, the first information about the second carrier group sent by the network-side device through the first carrier, in addition to including the system information of the second carrier, may further include at least one of the following:

[0271] 1) The relevant configuration information of the SSB currently being sent by the at least one second carrier, which may specifically include at least one of the following:

[0272] Whether the at least one second carrier is sending an SSB;

[0273] At least one of the frequency point of the SSB being sent by the at least one second carrier, the SSB transmission period, and the number of SSBs within one transmission period;

[0274] The transmission mode of the SSB being sent by the at least one second carrier, where the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, a compact transmission mode, a long-period transmission mode (with a long SSB transmission period), and an on-demand transmission mode. Among them, the energy-saving transmission mode may be a simplified transmission mode that only sends the Primary Synchronization Signal (PSS) and the Secondary Synchronization Signal (SSS), and the compact transmission mode may be a transmission mode where there is no time domain gap between multiple SSBs.

[0275] 2) The relevant configuration information of the RACH listening behavior currently of the at least one second carrier, which may specifically include at least one of the following:

[0276] Whether the at least one second carrier performs RACH listening;

[0277] At least one of the transmission period of the RACH being listened to by the at least one second carrier, the number of RACHs within one transmission period, the RACH frequency domain resource configuration information, and the RACH time domain resource configuration information;

[0278] The listening mode of the at least one second carrier for listening to the RACH, where the listening mode includes one of a normal listening mode, a simplified listening mode (e.g., reduced RO opportunity), an aggregated listening mode, and an on-demand listening mode. Among them, the simplified listening mode may include a reduced RO opportunity, and the aggregated listening mode may be a listening mode without a time-domain gap between multiple ROs. RO is short for Physical Random Access Channel Occasion.

[0279] 3) The characteristic information of the at least one second carrier itself, which may specifically include at least one of the following:

[0280] The identification information of the at least one second carrier (such as an index or a cell identifier);

[0281] Whether the at least one second carrier is in a barred state;

[0282] The priority of the at least one second carrier when the UE performs random access channel selection;

[0283] Whether the at least one second carrier is set to a barred state for the first type of UE, where the first type includes at least one of Reduced Capability (Redcap), Non-Terrestrial Network (NTN), and Network Energy Saving (NES) function;

[0284] The characteristic value N of the UE ID allowed to perform random access on the at least one second carrier. For example, a UE with UE ID mod number of carriers = N can perform random access on this carrier;

[0285] Whether the at least one second carrier supports UE residency;

[0286] Whether the at least one second carrier is a suitable cell;

[0287] Whether the at least one second carrier supports cell selection and / or cell reselection.

[0288] In some embodiments, the first information may be sent by the first carrier through a broadcast message; alternatively, it is defaulted that the first information is the same as the corresponding information of the first carrier; or when the first information is not configured, it is defaulted 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 configuration information related to cell selection criteria, the configuration information related to cell reselection criteria, and the cell bar information is the same as the corresponding one of the first carrier.

[0289] In some embodiments, if the first information does not contain the relevant information of the SSB, SIB1, or RACH monitoring currently being sent by a certain second carrier, it is defaulted that the SSB transmission, SIB1 transmission, and RACH monitoring of the second carrier are in a normal state, or in other words, they are all the same as the corresponding information of the first carrier.

[0290] In some embodiments, when performing cell selection for the first operation, although there are special carriers (second carriers that have obtained information from the first carrier), the first carrier is still preferentially selected.

[0291] 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 WUS and selects the first carrier for residence (monitor paging);

[0292] If the first carrier is determined not to be a Suitable Cell, at least one of the following is performed:

[0293] ■ Judging according to partial SIB information and SSB measurement results: The UE selects one or more second carriers in the second carrier group as target cells according to the first rule, and judges whether the one or more second carriers are suitable cells according to the information corresponding to the second carrier (such as the configuration information related to cell selection or cell reselection) and the SSB measurement results.

[0294] ◆ If at least one carrier is a suitable cell, the UE selects one of the second carriers for residence (monitor paging) according to the first rule.

[0295] ■ Judging according to SIB1 and SSB measurement results: The UE selects one or more second carriers in the second carrier group as target cells according to the first rule, and judges whether the one or more second carriers are suitable cells according to SIB1 corresponding to the second carrier (carried by the system information of the first carrier) and the SSB measurement results

[0296] ◆ If at least one carrier is suitable, the UE selects one of the carriers to camp on according to the first rule (monitor paging).

[0297] ■ The UE ignores the second carrier group and seeks other suitable cells.

[0298] 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 in the case where the reference signal is SSB, for a second carrier, if there is an SSB transmitted on the second carrier, the SSB measurement is directly performed on the second carrier to obtain the SSB measurement result; if there is no SSB transmitted on the second carrier, the SSB measurement result transmitted on the fourth carrier is used as the SSB measurement result of the second carrier, where the fourth carrier may include one of the reference carriers configured for the second carrier, the carrier co-located with the second carrier, and the carriers in the same frequency band as the second carrier and adjacent to each other, or, if there is no SSB transmitted on the second carrier, the measurement result of the SSB transmitted by the second carrier after the WUS trigger is successful is used as the SSB measurement result of the second carrier (the same below and will not be repeated).

[0299] Optionally, in some embodiments, the UE performs at least one of the following to determine the target carrier for performing the first operation:

[0300] ■ The UE selects one or more carriers from the first carrier and the second carrier group as the target cell according to the first rule: for the first carrier, it is determined whether it is a suitable cell according to the SSB measurement result and the SIB1 configuration; for the carriers in the second carrier group, it is determined whether the one or more carriers are suitable cells according to the information corresponding to the carrier (such as the configuration information related to cell selection or cell reselection) and the SSB measurement result.

[0301] ◆ If at least one carrier is a suitable cell, the UE selects one of the carriers to camp on according to the first rule.

[0302] ■ The UE selects one or more carriers from the first carrier and the second carrier group as the target cell according to the first rule: for the first carrier, it is determined whether it is a suitable cell according to the SSB measurement result and the SIB1 configuration; for the carriers in the second carrier group, it is determined whether the one or more carriers are suitable cells according to the SIB1 corresponding to the carrier (carried by the system information of the first carrier) and the SSB measurement result.

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

[0304] In some embodiments, the carriers in the second carrier group are not allowed to be camped on by the UE according to the protocol agreement.

[0305] In some embodiments, the UE determines whether it can camp according to whether there is paging configuration information in the information corresponding to the second carrier group sent on the first carrier.

[0306] In some embodiments, for a UE camping on the first carrier, intra-frequency and inter-frequency measurements are performed according to the configuration information of the first carrier. If a carrier in the second carrier group is determined to be the highest rankedCell or the target cell for cell reselection, the UE further determines whether the cell is a suitable cell. If it is a suitable cell, cell reselection is performed according to SIB1 obtained from the first carrier, and the UE camps on this cell.

[0307] In some embodiments, for a UE camping on the first carrier, if there is a need for random access, the UE defaults to directly initiating RACH on the first carrier for random access.

[0308] In some embodiments, for a UE camping on the first carrier, if there is a need for random access, the UE selects a target carrier for random access according to a first rule from the first carrier and the second carrier group:

[0309] 1) If the selected target carrier is the first carrier, directly initiate RACH for random access;

[0310] 2) If the selected target carrier is a carrier in the second carrier group, the UE initiates RACH for random access on this carrier according to SIB1 of this target carrier obtained from the first carrier.

[0311] In some embodiments, the first rule includes: the UE filters out eligible target carriers, and the conditions include at least one of the following:

[0312] The target carrier is not in a barred state for this UE;

[0313] The RSRP / RSRQ measured on the target carrier meets certain conditions, such as being greater than or equal to a threshold;

[0314] The target carrier is a suitable cell for this UE.

[0315] 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:

[0316] Randomly select the target carrier;

[0317] A weight value p is randomly generated, and each carrier is configured with corresponding weight values p(1), p(2), … in sequence. When p is within the range between p(0) + p(1) + … + p(i - 1) and p(0) + p(1) + … + p(i), then carrier i is selected as the target carrier;

[0318] The network side indicates / configures the target carrier for which the UE is to perform random access;

[0319] Select the carrier with the largest or smallest carrier index as the target carrier;

[0320] Select the carrier with the largest or smallest or intermediate center frequency as the target carrier;

[0321] Select the carrier with the largest or smallest SCS as the target carrier;

[0322] Select the second carrier with the smallest frequency interval from the first carrier as the target carrier;

[0323] Select the carrier that requires the fewest number of WUS transmissions as the target carrier;

[0324] Select the carrier with the highest priority as the target carrier;

[0325] Select the carrier with the largest RSRP / SINR measurement value of the reference signal as the target carrier.

[0326] In the scenario 1 mentioned above (the second carrier does not transmit SSB and performs normal RACH monitoring), the SIB corresponding to each second carrier in the second carrier group is configured on the first carrier. At least one second carrier in the second carrier group does not transmit SSB and the at least one second carrier has a reference carrier, and each second carrier in the second carrier group performs normal RACH monitoring. Specifically:

[0327] Cell 0: Belongs to band0 (anchor carrier), normally transmits SSB, and the SIBs of the remaining carriers (Cell1, Cell2, Cell3) will be carried in the SIB;

[0328] Cell 1: Belongs to Band 1, does not transmit SSB (with the first carrier as the reference), performs normal RACH monitoring, and does not transmit SIB1;

[0329] Cell 2: Belongs to Band 1, normally transmits SSB and performs normal RACH monitoring, and does not transmit SIB1;

[0330] Cell 3: Belongs to Band 2, does not transmit SSB (with Cell2 as the reference), performs normal RACH monitoring, and does not transmit SIB1.

[0331] In one example, the first information about the second carrier group sent by the network-side device via the first carrier may include: the SIBs of each second carrier in the second carrier group.

[0332] Among them, the SIBs of the second carrier included in the first information may include at least one of the following:

[0333] All or part of the SIBs of the second carrier, where the part of the SIBs may include at least one of the following: Public Land Mobile Network (PLMN) information, relevant configuration information of cell selection criteria, relevant configuration information of cell reselection criteria, and cell bar information.

[0334] The SIB1 status information of the second carrier, and the SIB1 status information includes at least one of not sending SIB1 and SIB1 being carried by the system information of the first carrier.

[0335] In one example, the first information about the second carrier group sent by the network-side device via the first carrier, in addition to including the system information of the second carrier, may also include at least one of the following:

[0336] 1) The relevant configuration information of the SSB currently being sent by the at least one second carrier, which may specifically include at least one of the following:

[0337] Whether the at least one second carrier is sending an SSB;

[0338] At least one of the frequency point of the SSB being sent by the at least one second carrier, the SSB transmission period, and the number of SSBs within one transmission period;

[0339] The transmission mode of the SSB being sent by the at least one second carrier, and the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, a compact transmission mode, a long-period transmission mode (the SSB transmission period is long), and an on-demand transmission mode. Among them, the energy-saving transmission mode may be a simplified transmission mode that only sends the Primary Synchronization Signal (PSS) and the Secondary Synchronization Signal (SSS), and the compact transmission mode may be a transmission mode where there is no time domain gap between multiple SSBs.

[0340] 2) Configuration information related to the RACH listening behavior of the at least one second carrier currently may specifically include at least one of the following:

[0341] Whether the at least one second carrier performs RACH listening;

[0342] At least one of the transmission period of the RACH being listened to by the at least one second carrier, the number of RACHs within one transmission period, RACH frequency domain resource configuration information, and RACH time domain resource configuration information;

[0343] The listening mode of the at least one second carrier for listening to RACH, where the listening mode includes one of a normal listening mode, a simplified listening mode (such as reduced RO opportunity), an aggregated listening mode, and an on-demand listening mode. Among them, the simplified listening mode may include reduced RO opportunity, and the aggregated listening mode may be a listening mode without a time domain gap between multiple ROs. RO is short for Physical Random Access Channel Occasion.

[0344] 3) Characteristic information of the at least one second carrier itself may specifically include at least one of the following:

[0345] The identification information of the at least one second carrier;

[0346] Whether the at least one second carrier can use the first carrier as a reference carrier;

[0347] Whether the at least one second carrier is co-located with the first carrier;

[0348] Whether the at least one second carrier is located in the same TAG as the first carrier;

[0349] Whether the at least one second carrier has a QCL relationship with the first carrier;

[0350] The reference carrier of the at least one second carrier;

[0351] The carrier co-located with the at least one second carrier;

[0352] The carrier located in the same TAG as the at least one second carrier;

[0353] The carrier having a QCL relationship with the at least one second carrier;

[0354] Whether the at least one second carrier is in a prohibited Bar state;

[0355] The priority of the at least one second carrier when the UE performs random access channel selection;

[0356] Whether the at least one second carrier is set to the Bar state for the first type of UE, where the first type includes at least one of Reduced Capability (Redcap), Non-Terrestrial Network (NTN), and Network Energy Saving (NES) function;

[0357] The eigenvalue N of the UE ID allowed to perform random access on the at least one second carrier. For example, a UE with UE ID mod number of carriers = N can perform random access on this carrier;

[0358] Whether the at least one second carrier supports UE residence;

[0359] Whether the at least one second carrier is a suitable Cell;

[0360] Whether the at least one second carrier supports cell selection and / or cell reselection.

[0361] In some embodiments, the first information can be sent by the first carrier through a broadcast message; or, by default, the first information is the same as the corresponding information of the first carrier; or, when the first information is not configured, it is defaulted 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 criterion, the relevant configuration information of the cell reselection criterion, and the cell bar information is the same as the corresponding one of the first carrier.

[0362] 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 WUS, selects the first carrier for residence (monitor paging), or selects a carrier for residence from the first carrier and / or the third carrier group according to the first rule:

[0363] ■ The third carrier group includes one of the carriers with the first carrier as the reference cell, co-located with the first carrier, and on the same frequency band as the first carrier and continuous with each other;

[0364] If the first carrier is determined not to be a suitable cell, then perform at least one of the following:

[0365] ■The UE selects one or more second carriers in the second carrier group as target cells according to the first rule, and determines whether the one or more second carriers are suitable cells according to the information corresponding to the second carrier (such as configuration information related to cell selection or cell reselection) and the SSB measurement result.

[0366] ◆If at least one second carrier is a suitable cell, the UE selects one of the second carriers to camp on (monitor paging) according to the first rule.

[0367] ■The UE selects one or more second carriers in the second carrier group as target cells according to the first rule, and determines whether the one or more second carriers are suitable cells according to SIB1 corresponding to the second carrier (carried by the system information of the first carrier) and the SSB measurement result.

[0368] ◆If at least one second carrier is a suitable cell, the UE selects one of the second carriers to camp on (monitor paging) according to the first rule.

[0369] ■The UE ignores the second carrier group and seeks other suitable cells.

[0370] Optionally, in some embodiments, the UE performs one of the following to determine the target carrier for performing the first operation:

[0371] ■The UE selects one or more carriers from the first carrier and the second carrier group according to the first rule: for the first carrier,

[0372] determine whether it is a suitable cell according to the SSB measurement result and the SIB1 configuration; for the carriers in the second carrier group, the UE determines whether the one or more carriers are suitable cells according to the SSB measurement result and SIB1 corresponding to the carrier (carried by the system information of the first carrier);

[0373] ◆If at least one carrier is a suitable cell, the UE selects one of the carriers to camp on (monitor paging) according to the first rule.

[0374] ■The UE selects one or more carriers from 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 according to the SSB measurement result and the SIB1 configuration; for the carriers in the second carrier group, determine whether the one or more carriers are suitable cells according to the information corresponding to the carrier (such as configuration information related to cell selection or cell reselection) and the SSB measurement result.

[0375] ◆ If at least one carrier is a suitable cell, the UE selects one of the carriers to camp on (monitor paging) according to the first rule.

[0376] It should be noted that for the SSB measurement result, if there is an SSB transmitted on the carrier, the SSB measurement is performed on this carrier to obtain the SSB measurement result; otherwise, the SSB transmitted on the reference carrier / co-located carrier / carriers located in the same frequency band and adjacent to each other configured for this carrier is measured as the SSB measurement result corresponding to this carrier.

[0377] In some embodiments, for the UE camping on the first carrier, intra-frequency and inter-frequency measurements are performed according to the configuration information of the first carrier. If one of the second carriers in the second carrier group is determined to be the highest ranked cell or the target cell for cell reselection, then:

[0378] Judge whether the second carrier is a suitable cell according to the SIB1 of the second carrier obtained from the first carrier. If so, the UE performs cell reselection and camps on the second carrier;

[0379] Judge whether the second carrier is a suitable cell. If so, the UE performs cell reselection and camps on the second carrier.

[0380] In some embodiments, for the UE camping on the first carrier, if there is a need for random access, the UE directly initiates RACH on the first carrier for random access by default.

[0381] In some embodiments, for the UE camping on the first carrier, if there is a need for random access, the UE selects one of the first carrier and the second carrier group as the target carrier for random access according to the first rule:

[0382] 1) If the selected target carrier is the first carrier, directly initiate RACH for random access;

[0383] 2) If the selected target carrier is a carrier in the second carrier group, the UE initiates RACH on this carrier for random access according to the SIB1 of this target carrier obtained from the first carrier.

[0384] In some embodiments, the first rule includes: the UE filters out eligible target carriers, and the conditions include at least one of the following:

[0385] The target carrier is not in a barred state for this UE;

[0386] The RSRP / RSRQ measured on the target carrier meets certain conditions, such as being greater than or equal to a threshold;

[0387] The target carrier is a suitable cell for the UE.

[0388] In some embodiments, the UE selects a target carrier from all carriers (the first carrier and / or the second carrier group) or all screened carriers, including at least one of the following:

[0389] Randomly select the target carrier;

[0390] Randomly generate a weight value p, and each carrier is configured with corresponding weight values p(1), p(2),... in sequence. When p is within the range of p(0)+p(1)+...+p(i - 1) and p(0)+p(1)+...+p(i), then select carrier i as the target carrier;

[0391] The network side indicates / configures the target carrier for which the UE is to perform random access;

[0392] Select the carrier with the largest or smallest carrier index as the target carrier;

[0393] Select the carrier with the largest, smallest or intermediate center frequency as the target carrier;

[0394] Select the carrier with the largest or smallest SCS as the target carrier;

[0395] Select the second carrier with the smallest frequency interval from the first carrier as the target carrier;

[0396] Select the carrier that requires the fewest number of WUS transmissions as the target carrier;

[0397] Select the carrier with the highest priority as the target carrier;

[0398] Select the carrier with the largest RSRP / SINR measurement value of the reference signal as the target carrier.

[0399] In the scenario 2 mentioned above (the second carrier does not transmit SSB and performs normal RACH monitoring), the first carrier is configured with the SIB corresponding to each second carrier in the second carrier group and the WUS configuration for triggering SSB transmission. At least one second carrier in the second carrier group does not transmit SSB (in the on-demand SSB transmission mode), and each second carrier in the second carrier group performs normal RACH monitoring. Specifically:

[0400] Cell 0: Belongs to band0 (anchor carrier), normally transmits SSB, and the SIB of the remaining carriers (Cell1, Cell2, Cell3) will be carried in the SIB;

[0401] Cell 1: Belongs to Band 1, does not transmit SSB (in the mode of transmitting SSB on demand), performs normal RACH monitoring, and does not transmit SIB1;

[0402] Cell 2: Belongs to Band 1, normally transmits SSB and performs normal RACH monitoring, and does not transmit SIB1;

[0403] Cell 3: Belongs to Band 2, does not transmit SSB (in the mode of transmitting SSB on demand), performs normal RACH monitoring, and does not transmit SIB1.

[0404] In one example, the first information about the second carrier group sent by the network side device through the first carrier may include: SIBs of each second carrier in the second carrier group.

[0405] Wherein, the SIBs of the second carrier included in the first information may include at least one of the following:

[0406] All SIBs or partial SIBs of the second carrier, wherein the partial SIBs may include at least one of the following: Public Land Mobile Network (PLMN) information, related configuration information of cell selection criteria, related configuration information of cell reselection criteria, and cell bar information;

[0407] SIB1 status information of the second carrier, and the SIB1 status information includes at least one of not transmitting SIB1 and SIB1 being carried by the system information of the first carrier.

[0408] In one example, the first information about the second carrier group sent by the network side device through the first carrier, in addition to including the system information of the second carrier, may further include at least one of the following:

[0409] 1) WUS configuration information for triggering the at least one second carrier to transmit SSB, or WUS configuration information for triggering the SSB adaptive adjustment of the at least one second carrier;

[0410] 2) Related configuration information of the SSB currently being transmitted by the at least one second carrier, which may specifically include at least one of the following:

[0411] Whether the at least one second carrier is transmitting SSB;

[0412] At least one of the frequency point of the SSB being transmitted by the at least one second carrier, the SSB transmission period, and the number of SSBs within one transmission period;

[0413] The transmission mode of the SSB transmitted by the at least one second carrier, where the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, a compact transmission mode, a long-cycle transmission mode (long SSB transmission cycle), and an on-demand transmission mode. Among them, the energy-saving transmission mode may be a simplified transmission mode that only transmits the Primary Synchronization Signal (PSS) and the Secondary Synchronization Signal (SSS), and the compact transmission mode may be a transmission mode where there is no time-domain gap between multiple SSBs.

[0414] 3) Configuration information related to the RACH listening behavior currently of the at least one second carrier, which may specifically include at least one of the following:

[0415] Whether the at least one second carrier performs RACH listening;

[0416] At least one of the transmission cycle of the RACH being listened to by the at least one second carrier, the number of RACHs within one transmission cycle, the RACH frequency-domain resource configuration information, and the RACH time-domain resource configuration information;

[0417] The listening mode of the at least one second carrier for listening to the RACH, where the listening mode includes one of a normal listening mode, a simplified listening mode (e.g., reduced RO opportunity), a compact listening mode, and an on-demand listening mode. Among them, the simplified listening mode may include a reduced RO opportunity, and the compact listening mode may be a listening mode where there is no time-domain gap between multiple ROs. RO is short for Physical Random Access Channel Occasion.

[0418] 4) Configuration information related to the SSB transmitted after being successfully triggered by WUS, which may specifically include at least one of the following:

[0419] After being successfully triggered by WUS, at least one of the frequency point for the at least one second carrier to transmit the SSB, the transmission cycle of the SSB, and the number of SSBs within one transmission cycle;

[0420] After being successfully triggered by WUS, the listening window for the at least one second carrier to transmit the SSB, that is, the UE listens to the SSB within this listening window;

[0421] After the successful triggering of WUS, the time-domain resource index or the position of at least one time-domain resource for the at least one second carrier to actually transmit the SSB;

[0422] After the successful triggering of WUS, at least one of the transmission time length for the at least one second carrier to transmit the SSB, the number of SSB transmissions, and the number of SSB transmission periods;

[0423] After the successful triggering of WUS, the relative relationship between the SSB transmitted by the at least one second carrier and the SSB transmitted by the first carrier in at least one of the time domain, frequency domain, and spatial domain;

[0424] After the successful triggering of WUS, the time-domain resource position of the first SSB transmitted by the at least one second carrier. For example, it is transmitted in the nearest SSB period X time slots / symbols after the transmission time of the trigger signal (WUS);

[0425] After the successful triggering of WUS, the transmission mode for the at least one second carrier to transmit the SSB, and the transmission mode includes one of the normal transmission mode, energy-saving transmission mode (e.g., only transmitting PSS and SSS), aggregated transmission mode (e.g., no time-domain interval between multiple SSBs), long-period transmission mode (longer SSB period), and on-demand transmission mode.

[0426] 5) Characteristic information of the at least one second carrier itself, which may specifically include at least one of the following:

[0427] Identification information of the at least one second carrier;

[0428] Whether the at least one second carrier is in the prohibited Bar state;

[0429] The priority of the at least one second carrier when the UE performs random access channel selection;

[0430] Whether the at least one second carrier is set to the Bar state for the first type of UE, where the first type includes at least one of Reduced Capability (Redcap), Non-Terrestrial Network (NTN), and Network Energy Saving (NES) function;

[0431] The characteristic value N of the UE ID allowed to perform random access on the at least one second carrier. For example, a UE with UE ID mod number of carriers = N can perform random access on this carrier;

[0432] Whether the at least one second carrier supports UE residency;

[0433] Whether the at least one second carrier is a suitable cell;

[0434] Whether the at least one second carrier supports cell selection and / or cell reselection.

[0435] 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 (CellBar) information is the same as that of the first carrier.

[0436] In some embodiments, if the first information does not include relevant information about SSB / RACH monitoring currently being sent by the second carrier (a carrier in the second carrier group), it is assumed that the SSB transmission, SIB1 transmission and RACH monitoring of the carrier are in normal state.

[0437] In some embodiments, when the UE performs cell selection, although there is a special carrier (a second carrier that has obtained information from the first carrier), the first carrier is still selected preferentially.

[0438] In some embodiments, after the UE detects the first carrier and obtains the first information, if the first carrier is determined to be a suitable cell, the UE does not send a WUS and selects the first carrier for monitor paging; if the first carrier is determined not to be a suitable cell, then:

[0439] ■ Sending a WUS to the second carrier, judging according to the triggered SSB measurement result and SIB1: the UE selects one or more carriers in the second carrier group according to the first rule to send the corresponding WUS and receive the SSB, and judging whether the one or more second carriers are suitable cells according to the SSB measurement result after the triggering is successful and the SIB1 information obtained through the first carrier;

[0440] ◆If at least one second carrier is a suitable cell, the UE selects one of the second carriers for monitor paging according to the first rule.

[0441] ■ Send WUS to the second carrier, and determine according to the triggered SSB measurement results and partial SIB information: The UE selects one or more carriers in the second carrier group to send the corresponding WUS and receive SSB according to the first rule, and determines whether the one or more second carriers are suitable cells according to the information corresponding to the carrier (such as the configuration information related to cell selection or cell reselection) and the SSB measurement results.

[0442] ◆ If at least one second carrier is a suitable cell, the UE selects one of the second carriers to camp on (monitor paging) according to the first rule.

[0443] ■ The UE ignores the second carrier group and seeks other suitable cells.

[0444] Optionally, in some embodiments, the UE performs one of the following to determine the target carrier for performing the first operation:

[0445] ■ The UE selects one or more carriers from the first carrier and the second carrier group according to the first rule: For the first carrier, determine whether it is a suitable cell according to the SSB measurement results and the SIB1 configuration; for the carriers in the second carrier group, send the corresponding WUS to receive SSB, and determine whether the one or more carriers are suitable cells according to the SSB measurement results and the SIB1 obtained through the first carrier.

[0446] ◆ If at least one carrier is a suitable cell, the UE selects one of the carriers to camp on (monitor paging) according to the first rule.

[0447] ■ The UE selects one or more carriers from the first carrier and the second carrier group as the target cell according to the first rule: For the first carrier, determine whether it is a suitable cell according to the SSB measurement results and the SIB1 configuration; for the carriers in the second carrier group, send the corresponding WUS to receive SSB, and determine whether the one or more carriers are suitable cells according to the SSB measurement results and the information corresponding to the carrier (such as the configuration information related to cell selection or cell reselection).

[0448] ◆ If at least one carrier is a suitable cell, the UE selects one of the carriers to camp on (monitor paging) according to the first rule.

[0449] In some embodiments, for a UE camping on the first carrier, perform intra-frequency and inter-frequency measurements according to the configuration information of the first carrier. If a second carrier in the second carrier group is determined to be the highest ranked cell or the target cell for cell reselection, then:

[0450] Determine whether the second carrier is a suitable cell according to the SIB1 of the second carrier obtained from the first carrier. If so, the UE performs cell reselection and camps on the second carrier.

[0451] Determine whether the second carrier is a suitable cell. If so, the UE performs cell reselection and camps on the second carrier.

[0452] In some embodiments, for a UE camping on the first carrier, if there is a need for random access, the UE defaults to directly initiating a RACH on the first carrier for random access.

[0453] In some embodiments, for a UE camping on the first carrier, if there is a need for random access, the UE selects a target carrier for random access according to a first rule from the first carrier and the second carrier group:

[0454] 1) If the selected target carrier is the first carrier, directly initiate a RACH for random access;

[0455] 2) If the selected target carrier is a carrier in the second carrier group, the UE initiates a RACH for random access on this carrier according to the SIB1 of this target carrier obtained on the first carrier.

[0456] In some embodiments, the first rule includes: the UE screens out eligible target carriers, and the conditions include at least one of the following:

[0457] The target carrier is not in a barred state for this UE;

[0458] The RSRP / RSRQ measured on the target carrier meets certain conditions, such as being greater than or equal to a threshold;

[0459] The target carrier is a suitable cell for this UE.

[0460] In some embodiments, the UE selects a target carrier from all carriers (the first carrier and / or the second carrier group) or all screened carriers, including at least one of the following:

[0461] Randomly select the target carrier;

[0462] Randomly generate a weight value p. Each carrier is configured with a corresponding weight value p(1), p(2),... in sequence. When p is within the range of p(0)+p(1)+...+p(i - 1) and p(0)+p(1)+...+p(i), then select carrier i as the target carrier;

[0463] The network side indicates / configures the target carrier for which the UE is to perform random access;

[0464] Select the carrier with the largest or smallest carrier index as the target carrier;

[0465] Select the carrier with the largest, smallest, or intermediate carrier center frequency as the target carrier;

[0466] Select the carrier with the largest or smallest SCS as the target carrier;

[0467] Select the second carrier with the smallest frequency interval from the first carrier as the target carrier;

[0468] Select the carrier that requires the fewest number of WUS transmissions as the target carrier;

[0469] Select the carrier with the highest priority as the target carrier;

[0470] Select the carrier with the largest RSRP / SINR measurement value of the reference signal as the target carrier.

[0471] In the scenario 3 mentioned above (the second carrier does not send SSB (with a reference carrier) and does not perform normal RACH monitoring), the SIB corresponding to each second carrier in the second carrier group and the WUS configuration for triggering RACH monitoring are configured on the first carrier. At least one second carrier in the second carrier group does not send SSB (referencing the first carrier), and each second carrier in the second carrier group does not perform normal RACH monitoring. Specifically:

[0472] Cell 0: Belongs to band0 (anchor carrier), normally sends SSB, and the SIBs of the remaining carriers (Cell1, Cell2, Cell3) will be carried in the SIB;

[0473] Cell 1: Belongs to Band 1, normally sends SSB, does not perform normal RACH monitoring, and does not send SIB1;

[0474] Cell 2: Belongs to Band 1, does not send SSB (referencing the first carrier), does not perform normal RACH monitoring, and does not send SIB1;

[0475] Cell 3: Belongs to Band 2, normally sends SSB (referencing Cell1 as the reference carrier), does not perform normal RACH monitoring, and does not send SIB1.

[0476] In one example, the first information about the second carrier group sent by the network side device through the first carrier may include: the SIBs of each second carrier in the second carrier group.

[0477] Among them, the SIB of the second carrier included in the first information may include at least one of the following:

[0478] All or part of the SIBs of the second carrier, where the part of the SIBs may include at least one of the following: Public Land Mobile Network (PLMN) information, configuration information related to cell selection criteria, configuration information related to cell reselection criteria, and cell bar information;

[0479] The SIB1 status information of the second carrier, where the SIB1 status information includes at least one of the following: SIB1 not sent and SIB1 carried by the system information of the first carrier.

[0480] In one example, the first information about the second carrier group sent by the network side device through the first carrier, in addition to including the system information of the second carrier, may further include at least one of the following:

[0481] 1) The WUS configuration information for triggering the random access channel (RACH) monitoring of the at least one second carrier, or the WUS configuration information for triggering the adaptive adjustment of the RACH monitoring of the at least one second carrier;

[0482] 2) The configuration information related to the SSB currently being sent by the at least one second carrier, specifically, it may include at least one of the following:

[0483] Whether the at least one second carrier is currently sending an SSB;

[0484] At least one of the following: the frequency point of the SSB being sent by the at least one second carrier, the SSB transmission period, and the number of SSBs within one transmission period;

[0485] The transmission mode of the SSB being sent by the at least one second carrier, where the transmission mode includes one of the following: normal transmission mode, energy-saving transmission mode, compact transmission mode, long-period transmission mode (long SSB transmission period), and on-demand transmission mode. Among them, the energy-saving transmission mode may be a simplified transmission mode that only sends the Primary Synchronization Signal (PSS) and the Secondary Synchronization Signal (SSS), and the compact transmission mode may be a transmission mode where there is no time domain gap between multiple SSBs.

[0486] 3) The configuration information related to the RACH monitoring after the successful triggering by WUS, specifically, it may include:

[0487] After the successful triggering of WUS, at least one of the cycle for the at least one second carrier to monitor the RACH, the number of monitored RACHs, the frequency-domain resource configuration information for monitoring the RACH, the time-domain resource configuration information for monitoring the RACH, and the monitoring mode for monitoring the RACH, where the monitoring mode includes one of a normal monitoring mode, a simplified monitoring mode (e.g., reducing the RO opportunity), an aggregated monitoring mode (no time-domain interval between multiple ROs), and a on-demand monitoring mode.

[0488] 4) Characteristic information of the at least one second carrier itself, which may specifically include at least one of the following:

[0489] Identification information of the at least one second carrier;

[0490] Whether the at least one second carrier can use the first carrier as a reference carrier;

[0491] Whether the at least one second carrier is co-located with the first carrier;

[0492] Whether the at least one second carrier is in the same TAG as the first carrier;

[0493] Whether the at least one second carrier has a QCL relationship with the first carrier;

[0494] The reference carrier of the at least one second carrier;

[0495] The carrier co-located with the at least one second carrier;

[0496] The carrier in the same TAG as the at least one second carrier;

[0497] The carrier having a QCL relationship with the at least one second carrier;

[0498] Whether the at least one second carrier is in a prohibited Bar state;

[0499] The priority of the at least one second carrier when the UE performs random access channel selection;

[0500] Whether the at least one second carrier is set to the Bar state for the first type of UE, where the first type includes at least one of Reduced Capability (Redcap), Non-Terrestrial Network (NTN), and Network Energy Saving (NES) function;

[0501] The eigenvalue N of the UE ID that allows random access on the at least one second carrier. For example, a UE with UE ID mod number of carriers = N can perform random access on this carrier;

[0502] Whether the at least one second carrier supports UE residence;

[0503] Whether the at least one second carrier is a suitable cell;

[0504] Whether the at least one second carrier supports cell selection and / or cell reselection.

[0505] In some embodiments, the first information can be sent by the first carrier through a broadcast message; or, by default, the first information is the same as the corresponding information of the first carrier; or, when the first information is not configured, it is default 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 criterion, the relevant configuration information of the cell reselection criterion, and the cell bar information is the same as the corresponding one of the first carrier.

[0506] In some embodiments, when the UE performs cell selection, although there is a special carrier (the second carrier that has obtained information from the first carrier), it still preferentially selects the first carrier.

[0507] 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 WUS and selects the first carrier for residence (monitor paging); if the first carrier is determined not to be a suitable cell, the UE selects the second carrier for residence (monitor paging), or selects a carrier from the first carrier and / or the third carrier group for residence (monitor paging) according to the first rule:

[0508] ■ The third carrier group includes at least one of the carriers that use the first carrier as a reference cell, are co-located with the first carrier, and are on the same frequency band as the first carrier and are continuous with each other.

[0509] If the first carrier is determined not to be a suitable cell, then perform at least one of the following:

[0510] ■ 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 according to the SIB1 (carried by the system information of the first carrier) and the SSB measurement results corresponding to the carrier.

[0511] ◆ If at least one carrier is a suitable cell, the UE selects one of the carriers to camp on (monitor paging) according to the first rule.

[0512] ■ 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 according to the information corresponding to the carrier (such as the configuration information related to cell selection or cell reselection) and the SSB measurement result.

[0513] ◆ If at least one carrier is a suitable cell, the UE selects one of the carriers to camp on (monitor paging) according to the first rule.

[0514] ■ The UE ignores the second carrier group and seeks other suitable cells.

[0515] Optionally, in some embodiments, the UE performs one of the following to determine the target carrier for performing the first operation:

[0516] ■ 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 according to the SSB measurement result and the SIB1 configuration; for the carriers in the second carrier group, the UE determines whether the one or more carriers are suitable cells according to the SSB measurement result and the SIB1 of the carrier (carried by the system information of the first carrier).

[0517] ◆ If at least one carrier is a suitable cell, the UE selects one of the carriers to camp on (monitor paging) according to the first rule.

[0518] ■ 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 according to 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 according to the information corresponding to the carrier (such as the configuration information related to cell selection or cell reselection) and the SSB measurement result.

[0519] ◆ If at least one carrier is a suitable cell, the UE selects one of the carriers to camp on (monitor paging) according to the first rule.

[0520] In some embodiments, for a UE resident on a first carrier, in-band and inter-band 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 the highest ranked cell or the target cell for cell reselection, the UE determines whether the cell is a suitable cell based on the SSB measurement result and the system information of this carrier obtained from the first carrier. If it is a suitable cell, the UE performs cell reselection and camps on this cell.

[0521] In some embodiments, for a UE resident on a first carrier, if there is a need for random access, the UE defaults to directly initiating RACH on the first carrier for random access.

[0522] In some embodiments, for a UE resident on a first carrier, if there is a need for random access, the UE selects a target carrier for random access according to a first rule from the first carrier and the second carrier group:

[0523] 1) If the selected target carrier is the first carrier, directly initiate RACH for random access;

[0524] 2) If the selected target carrier is a carrier in the second carrier group, the UE first sends a WUS to trigger RACH monitoring on this target carrier, and then initiates RACH for random access on this carrier according to the configuration of SIB1 of this carrier obtained through the first carrier.

[0525] In some embodiments, the first rule includes: the UE filters out eligible target carriers, and the conditions include at least one of the following:

[0526] The target carrier is not in a barred state for this UE;

[0527] The RSRP / RSRQ measured on the target carrier meets certain conditions, such as being greater than or equal to a threshold;

[0528] The target carrier is a suitable cell for this UE.

[0529] 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:

[0530] Randomly select the target carrier;

[0531] Randomly generate a weight value p, and each carrier is sequentially configured with corresponding weight values p(1), p(2),.... When p is within the range of p(0)+p(1)+...+p(i-1) and p(0)+p(1)+...+p(i), then select carrier i as the target carrier;

[0532] The network side indicates / configures the target carrier for which the UE is to perform random access;

[0533] Select the carrier with the largest or smallest carrier index as the target carrier;

[0534] Select the carrier with the largest or smallest or intermediate center frequency as the target carrier;

[0535] Select the carrier with the largest or smallest SCS as the target carrier;

[0536] Select the second carrier with the smallest frequency interval from the first carrier as the target carrier;

[0537] Select the carrier that requires the fewest number of WUS transmissions as the target carrier;

[0538] Select the carrier with the highest priority as the target carrier;

[0539] Select the carrier with the largest RSRP / SINR measurement value of the reference signal as the target carrier.

[0540] In the scenario 4 mentioned above (the second carrier does not transmit SSB and does not perform normal RACH listening), the first carrier is configured with the SIB corresponding to each second carrier in the second carrier group and the WUS configuration for triggering SSB transmission and RACH listening. At least one second carrier in the second carrier group does not transmit SSB (SSB transmission on demand mode), and each second carrier in the second carrier group does not perform normal RACH listening. Specifically:

[0541] Cell 0: Belongs to band0 (anchor carrier), normally transmits SSB, and the SIB of the remaining carriers (Cell1, Cell2, Cell3) will be carried in the SIB;

[0542] Cell 1: Belongs to Band 1, transmits SSB on demand, does not perform normal RACH listening, and does not transmit SIB1;

[0543] Cell 2: Belongs to Band 1, normally transmits SSB, does not perform normal RACH listening, and does not transmit SIB1;

[0544] Cell 3: Belongs to Band 2, transmits SSB on demand, does not perform normal RACH listening, and does not transmit SIB1.

[0545] In an example, the first information about the second carrier group sent by the network side device through the first carrier may include: the SIB of each second carrier in the second carrier group.

[0546] Wherein, the SIB of the second carrier included in the first information may include at least one of the following:

[0547] All or part of the SIBs of the second carrier, where the part of the SIBs may include at least one of the following: Public Land Mobile Network (PLMN) information, relevant configuration information of cell selection criteria, relevant configuration information of cell reselection criteria, and cell bar information.

[0548] The SIB1 status information of the second carrier, where the SIB1 status information includes at least one of not sending SIB1 and SIB1 being carried by the system information of the first carrier.

[0549] In one example, the first information about the second carrier group sent by the network side device through the first carrier, in addition to including the system information of the second carrier, may further include at least one of the following:

[0550] 1) The WUS configuration information for triggering the at least one second carrier to send an SSB, or the WUS configuration information for triggering the adaptive adjustment of the SSB of the at least one second carrier;

[0551] 2) The WUS configuration information for triggering the random access channel (RACH) monitoring of the at least one second carrier, or the WUS configuration information for triggering the adaptive adjustment of the RACH monitoring of the at least one second carrier;

[0552] 3) The WUS configuration information for both triggering the at least one second carrier to send an SSB or perform an adaptive adjustment of the SSB and triggering the at least one second carrier to perform random access channel (RACH) monitoring or an adaptive adjustment of the RACH monitoring;

[0553] 4) The relevant configuration information of the SSB currently being sent by the at least one second carrier, which may specifically include at least one of the following:

[0554] Whether the at least one second carrier is sending an SSB;

[0555] At least one of the frequency point of the SSB being sent by the at least one second carrier, the SSB transmission period, and the number of SSBs within one transmission period;

[0556] The transmission mode of the SSB transmitted by the at least one second carrier, where the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, a compact transmission mode, a long-period transmission mode (long transmission period of the SSB), and an on-demand transmission mode. Among them, the energy-saving transmission mode may be a simplified transmission mode that only transmits the Primary Synchronization Signal (PSS) and the Secondary Synchronization Signal (SSS), and the compact transmission mode may be a transmission mode where there is no time-domain gap between multiple SSBs.

[0557] 5) Configuration information related to the RACH listening behavior currently of the at least one second carrier, which may specifically include at least one of the following:

[0558] Whether the at least one second carrier performs RACH listening;

[0559] At least one of the transmission period of the RACH being listened to by the at least one second carrier, the number of RACHs within one transmission period, the RACH frequency-domain resource configuration information, and the RACH time-domain resource configuration information;

[0560] The listening mode of the at least one second carrier for RACH, where the listening mode includes one of a normal listening mode, a simplified listening mode (such as reduced RO opportunity), a compact listening mode, and an on-demand listening mode. Among them, the simplified listening mode may include reduced RO opportunity, and the compact listening mode may be a listening mode where there is no time-domain gap between multiple ROs. RO is short for Physical Random Access Channel Occasion.

[0561] 6) Configuration information related to RACH listening after being successfully triggered by WUS, which may specifically include:

[0562] After being successfully triggered by WUS, at least one of the period of the at least one second carrier listening to RACH, the number of RACHs listened to, the RACH frequency-domain resource configuration information, the RACH time-domain resource configuration information, and the listening mode of listening to RACH. Among them, the listening mode includes one of a normal listening mode, a simplified listening mode (such as reduced RO occasion), a compact listening mode (no time-domain gap between multiple ROs), and an on-demand listening mode.

[0563] 7) Configuration information related to RACH monitoring after successful triggering by WUS, which may specifically include:

[0564] After successful triggering by WUS, at least one of the following for the at least one second carrier: the period of monitoring RACH, the number of RACHs to be monitored, the frequency-domain resource configuration information for monitoring RACH, the time-domain resource configuration information for monitoring RACH, and the monitoring mode for monitoring RACH. The monitoring mode includes one of a normal monitoring mode, a simplified monitoring mode (e.g., reducing the RO opportunity), an aggregated monitoring mode (no time-domain interval between multiple ROs), and a on-demand monitoring mode.

[0565] 8) Characteristic information of the at least one second carrier itself, which may specifically include at least one of the following:

[0566] The identification information of the at least one second carrier;

[0567] Whether the at least one second carrier is in a barred state;

[0568] The priority of the at least one second carrier when the UE performs random access channel selection;

[0569] Whether the at least one second carrier is set to a barred state for the first type of UE, where the first type includes at least one of Reduced Capability (Redcap), Non-Terrestrial Network (NTN), and Network Energy Saving (NES) function;

[0570] The characteristic value N of the UE ID allowed for random access on the at least one second carrier. For example, a UE with UE ID mod number of carriers = N can perform random access on this carrier;

[0571] Whether the at least one second carrier supports UE residence;

[0572] Whether the at least one second carrier is a suitable cell;

[0573] Whether the at least one second carrier supports cell selection and / or cell reselection.

[0574] In some embodiments, the first information may be sent by the first carrier through a broadcast message; alternatively, it is defaulted that the first information is the same as the corresponding information of the first carrier; or when the first information is not configured, it is defaulted 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 cell selection criteria, the relevant configuration information of cell reselection criteria, and the cell bar information is the same as the corresponding one of the first carrier.

[0575] In some embodiments, when the UE performs cell selection, although there is a special carrier (the second carrier that has obtained information from the first carrier), the first carrier is still preferentially selected.

[0576] 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 paging monitoring; if the first carrier is determined not to be a suitable cell, then one of the following is performed:

[0577] ■ Send a WUS to each second carrier in the second carrier group, and judge according to the triggered SSB measurement result and SIB1: The UE selects one or more carriers in the second carrier group according to the first rule to send the corresponding WUS and receive the SSB, and judges whether the one or more second carriers are suitable cells according to the SSB measurement result after the trigger is successful and the SIB1 information of this carrier obtained through the first carrier;

[0578] ◆ If at least one second carrier is a suitable cell, the UE selects one of the second carriers for paging monitoring according to the first rule.

[0579] ■ Send a WUS to each second carrier in the second carrier group, and judge according to the triggered SSB measurement result and partial SIB information: The UE selects one or more carriers in the second carrier group according to the first rule to send the corresponding WUS and receive the SSB, and judges whether the one or more second carriers are suitable cells according to the information corresponding to this carrier (such as the configuration information related to cell selection or cell reselection) and the SSB measurement result.

[0580] ◆ If at least one second carrier is a suitable cell, the UE selects one of the second carriers for paging monitoring according to the first rule.

[0581] ■ The UE ignores the second carrier group and seeks other suitable cells.

[0582] Optionally, in some embodiments, the UE performs one of the following to determine the target carrier for performing the first operation:

[0583] ■ The UE selects one or more carriers from the first carrier and the second carrier group according to the first rule: For the first carrier, it is judged whether it is a suitable cell according to the SSB measurement result and the SIB1 configuration; for the carriers in the second carrier group, the corresponding WUS is sent to receive the SSB, and it is judged whether the one or more carriers are suitable cells according to the SSB measurement result and the SIB1 obtained through the first carrier.

[0584] ◆ If at least one carrier is a suitable cell, the UE selects one of them to perform resident (monitor paging) according to the first rule.

[0585] ■ The UE selects one or more carriers from the first carrier and the second carrier group as the target cell according to the first rule: For the first carrier, it is judged whether it is a suitable cell according to the SSB measurement result and the SIB1 configuration; for the carriers in the second carrier group, the corresponding WUS is sent to receive the SSB, and it is judged whether the one or more carriers are suitable cells according to the SSB measurement result and the information corresponding to the carrier (such as the configuration information related to cell selection or cell reselection).

[0586] ◆ If at least one carrier is a suitable cell, the UE selects one of them to perform resident (monitor paging) according to the first rule.

[0587] In some embodiments, for the UE resident on the first carrier, in-band and inter-band measurements are performed according to the configuration information of the first carrier. If a second carrier in the second carrier group is determined to be the highest ranked cell or the target cell for cell reselection, the UE sends WUS to this carrier to trigger the transmission of the SSB. After obtaining the SSB measurement result, it is judged whether this cell is a suitable cell according to the SSB measurement result and the system information of this carrier obtained from the first carrier. If it is a suitable cell, the UE performs cell reselection and resides in this cell.

[0588] In some embodiments, for the UE resident on the first carrier, if there is a need for random access, the UE defaults to directly initiating RACH on the first carrier for random access.

[0589] In some embodiments, for the UE resident on the first carrier, if there is a need for random access, the UE selects one for the target carrier for random access from the first carrier and the second carrier group according to the first rule:

[0590] 1) If the selected target carrier is the first carrier, directly initiate RACH for random access;

[0591] 2) If the selected target carrier is a carrier in the second carrier group, and the target carrier does not transmit SSB and has no reference carrier, the UE sends a WUS to trigger the SSB transmission and RACH monitoring of the target carrier, and then the UE initiates RACH for random access on this carrier according to the configuration of SIB1 of this target carrier obtained on the first carrier. Optionally, one WUS is sent to trigger the SSB transmission and RACH monitoring, or the first WUS can be sent first to trigger the SSB transmission, and then another WUS is sent to trigger the RACH monitoring.

[0592] In some embodiments, the first rule includes: the UE filters out eligible target carriers, and the conditions include at least one of the following:

[0593] The target carrier is not in a barred state for this UE;

[0594] The RSRP / RSRQ measured on the target carrier meets certain conditions, such as being greater than or equal to a threshold;

[0595] The target carrier is a suitable cell for this UE.

[0596] 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:

[0597] Randomly select the target carrier;

[0598] Randomly generate a weight value p, and each carrier is configured with a corresponding weight value p(1), p(2),..., when p is within the range of p(0)+p(1)+...+p(i - 1) and p(0)+p(1)+...+p(i), then carrier i is selected as the target carrier;

[0599] The network side indicates / configures the target carrier for which the UE is to perform random access;

[0600] Select the carrier with the largest or smallest carrier index as the target carrier;

[0601] Select the carrier with the largest or smallest or intermediate carrier center frequency as the target carrier;

[0602] Select the carrier with the largest or smallest SCS as the target carrier;

[0603] Select the second carrier with the smallest frequency interval from the first carrier as the target carrier;

[0604] Select the carrier that requires the fewest number of WUS transmissions as the target carrier;

[0605] Select the carrier with the highest priority as the target carrier;

[0606] Select the carrier with the largest RSRP / SINR measurement value of the reference signal as the target carrier.

[0607] It should be noted that the on-demand SSB involved in the embodiment means that the carrier supports the on-demand SSB transmission mode, that is, it supports the UE to trigger the transmission of the normal SSB with WUS. The same applies to on-demand SIB1 and on-demand RACH monitoring.

[0608] Embodiment 2 (When there are multiple carriers with different transmission modes or the same transmission mode, the UE selects the carrier with the highest priority for RACH)

[0609] The terminal obtains the system information of Cell1, Cell2, Cell3, Cell4, and Cell5 on the first carrier Cell 0 (anchor carrier) in operation, and the terminal obtains the remaining first information about the second carriers Cell1, Cell2, Cell3, Cell4, and Cell5 on Cell0 respectively. Among them:

[0610] Cell 0: Belongs to band0 (anchor carrier), normally sends SSB, and the system information of the remaining carriers will be carried in the SIB;

[0611] Cell 1: Belongs to Band 1, does not send SSB (uses the SSB of the first carrier as a reference), performs normal RACH monitoring, and does not send SIB1;

[0612] Cell 2: Belongs to Band 2, sends SSB on demand, performs normal RACH monitoring, and does not send SIB1;

[0613] Cell 3: Belongs to Band 3, normally sends SSB, does not perform normal RACH monitoring, and does not send SIB1;

[0614] Cell 4: Belongs to Band 4, does not send SSB (uses the SSB of the first carrier as a reference), does not perform normal RACH monitoring, and does not send SIB1;

[0615] Cell 5: Belongs to Band 5, sends SSB on demand, does not perform normal RACH monitoring, and does not send SIB1.

[0616] If the first priority is specified as: the carrier priority for transmitting SSB > the carrier priority for transmitting SSB on demand > the carrier priority for not transmitting SSB; and, the second priority is specified as: the carrier priority for performing normal RACH monitoring > the carrier priority for not performing normal RACH monitoring, and the first priority is considered first, then: among Cell1, Cell2, Cell3, Cell4, and Cell5, since the highest priority is Cell3, the terminal considers performing RACH in Cell3.

[0617] Embodiment 3 (When there are multiple carriers with different transmission modes or the same transmission mode, the UE selects the carrier that requires the fewest number of WUS transmissions for RACH)

[0618] On the first carrier Cell 0 (anchor carrier) on which the terminal is operating, the system information of Cell1, Cell2, Cell3, Cell4, and Cell5 is obtained, and the terminal obtains the first configurations regarding the second carriers Cell1, Cell2, Cell3, Cell4, and Cell5 on Cell0 respectively.

[0619] Cell 0: Belongs to band0, normally transmits SSB, and the system information of the remaining carriers will be carried in the SIB.

[0620] Cell 1: Belongs to Band 1, does not normally transmit SSB (referencing the SSB of the first carrier), performs normal RACH monitoring, and does not transmit SIB1.

[0621] Cell 2: Belongs to Band 2, transmits SSB on demand, performs normal RACH monitoring, and does not transmit SIB1.

[0622] Cell 3: Belongs to Band 3, transmits SSB, does not perform normal RACH monitoring, and does not transmit SIB1.

[0623] Cell 4: Belongs to Band 4, does not transmit SSB (referencing the SSB of the first carrier), does not perform normal RACH monitoring, and does not transmit SIB1.

[0624] Cell 5: Belongs to Band 5, transmits SSB on demand, does not perform normal RACH monitoring, and does not transmit SIB1.

[0625] The UE selects a carrier on the second carrier group for RACH according to the principle of the fewest number of WUS transmissions required. In this embodiment, transmitting WUS once is either for triggering SSB transmission or for triggering RACH monitoring.

[0626] Then, since:

[0627] Cell1 does not need to send WUS. The UE can directly use the SSB of the first carrier as a reference and perform random access in Cell1 using the system information obtained in Cell0.

[0628] Cell2 needs to send WUS once to trigger the SSB transmission / SSB adaptation adjustment in Cell2.

[0629] Cell3 needs to send WUS once to trigger the RACH listening in Cell3.

[0630] Cell4 needs to send WUS once to trigger the RACH listening in Cell4.

[0631] Cell5 needs to send WUS twice, once to trigger SSB transmission and once to trigger ARCH listening.

[0632] Therefore, among Cell1, Cell2, Cell3, Cell4, and Cell5, the one that requires the fewest number of WUS transmissions is Cell1. Furthermore, the terminal considers performing RACH in Cell1. If the configurations of multiple cells are the same as that of Cell1, the UE can randomly select one of them for RACH.

[0633] Embodiment 4 (When there are multiple carriers with different or the same transmission modes, the UE selects the carrier with the highest priority for RACH)

[0634] On the first carrier Cell 0 (anchor carrier) on which the terminal is operating, the terminal obtains the system information of Cell1, Cell2, Cell3, Cell4, and Cell5, and the terminal respectively obtains the first configurations of the second carriers Cell1, Cell2, Cell3, Cell4, and Cell5 on Cell0.

[0635] Cell 0: Belongs to band0, normally sends SSB, and the system information of the remaining carriers will be carried in the SIB.

[0636] Cell 1: Belongs to Band 1, does not send SSB (uses the SSB of the first carrier as a reference), performs normal RACH listening, does not send SIB1, and the frequency interval from Cell0 is within interval 1.

[0637] Cell 2: Belongs to Band 2, sends SSB as needed, performs normal RACH listening, does not send SIB1, and the frequency interval from Cell0 is within interval 1.

[0638] Cell 3: Belongs to Band 3, normally sends SSB, does not perform normal RACH listening, does not send SIB1, and the frequency interval from Cell0 is within interval 1.

[0639] Cell 4: Belongs to Band 4, does not transmit SSB (using the SSB of the first carrier as a reference), does not perform normal RACH monitoring, does not transmit SIB1, and the frequency interval from Cell0 is within interval 2;

[0640] Cell 5: Belongs to Band 5, transmits SSB as needed, does not perform normal RACH monitoring, does not transmit SIB1, and the frequency interval from Cell0 is within interval 2.

[0641] The protocol stipulates the carrier priority formula: y = A + B + C. The smaller the priority value, the higher the priority. Among them,

[0642] ● A is related to the SSB transmission mode of this carrier

[0643] ■ A = 0, this carrier is in the normal SSB transmission mode;

[0644] ■ A = 1, this carrier is in the transmission mode of not transmitting SSB (referencing the first carrier);

[0645] ■ A = 2, this carrier is in the mode of transmitting SSB as needed / simplified SSB transmission mode / long - period SSB transmission mode (normal SSB transmission can be triggered through WUS).

[0646] ● B is related to the RACH monitoring mode of this carrier

[0647] ■ B = 0, this carrier is in the normal RACH monitoring mode;

[0648] ■ B = 1, this carrier is in the mode of performing RACH monitoring as needed.

[0649] ● C is related to the frequency interval between this carrier and the first carrier

[0650] ■ C = 0, the frequency interval is within interval 1;

[0651] ■ C = 1, the frequency interval is within interval 2.

[0652] According to the above formula, it can be known that:

[0653] The priority of Cell1 = 1 + 0 + 0 = 1

[0654] The priority of Cell2 = 2 + 0 + 0 = 2

[0655] The priority of Cell3 = 0 + 1 + 0 = 1

[0656] The priority of Cell4 = 1 + 1 + 1 = 3

[0657] The priority of Cell5 = 2 + 1 + 1 = 4.

[0658] Since the smaller the priority value, the higher the priority. Therefore, the UE will randomly select either Cell1 or Cell3 for RACH.

[0659] In addition, the priority of the second carrier or carrier group may also be directly configured by the network side in the first piece of information, and the UE can select the carrier for random access according to the configured priority value.

[0660] Embodiment 5 (Corresponding relationship between WUS resources and the second carrier or second carrier group)

[0661] 1) As Figure 6 shown, the WUS resources configured for the second carrier group through the first carrier (anchor carrier) correspond one-to-one with the carriers (non-anchor carriers) in the second carrier group.

[0662] 2) As Figure 7 shown, there is a corresponding WUS resource position on each second carrier.

[0663] 3) As Figure 8 shown, the WUS resources configured for the second carrier group through the first carrier (anchor carrier) coincide with the common RACH resources. The UE can be regarded as triggering the SSB transmission of the corresponding second carrier (non-anchor carrier) only when sending a specific preamble sequence on a specific resource.

[0664] The above introduced a random access method proposed in an embodiment of the present application. Corresponding to the above random access method, an embodiment of the present application also proposes a communication method, which will be described below.

[0665] As Figure 9 shown, a communication method proposed in an embodiment of the present application may include:

[0666] Step 901, the network side device sends first information about a second access object group to the terminal through a first access object, where the second access object group includes one or more second access objects different from the first access object, and the first information includes the system information SIB of the second access object. The first information is used for the terminal to select a target access object for performing a first operation, where the first operation includes camping or random access, and the access object includes one of a carrier, a cell, and a bandwidth part BWP.

[0667] Among them, 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 multi-access object scenario, and the following mainly takes a multi-carrier scenario as an example for illustration.

[0668] In one embodiment, in a multi-carrier scenario, the first access object may be an anchor carrier, and the second access object may be a non-anchor carrier. On the anchor carrier, the UE can obtain the system information of the anchor carrier and the necessary system information of other non-anchor carriers. And the UE can perform at least one of random access (Random Access Channel, RACH), data transmission, and data reception on the anchor carrier and the non-anchor carrier arbitrarily.

[0669] In another embodiment, in a multi-carrier scenario, the first access object may be a carrier that normally transmits SSB, and the second access object may be a carrier that does not normally transmit SSB (SSB-less carrier).

[0670] Wherein, the first information may be sent by the first access object through a broadcast message; or, it is defaulted that the first information is the same as the corresponding information of the first access object.

[0671] Wherein, the system information of the second access object included in the first information includes at least one of the following:

[0672] All or part of the SIBs of the second access object, wherein the part of the SIBs may include at least one of the following: Public Land Mobile Network (PLMN) information, related configuration information of cell selection criteria, related configuration information of cell reselection criteria, and cell bar information;

[0673] The SIB1 status information of the second access object, and the SIB1 status information includes at least one of not sending SIB1 and SIB1 being carried by the system information of the first access object.

[0674] Wherein, the first information corresponds to at least one second access object in the second access object group, and the first information further includes at least one of the following:

[0675] 1) The WUS configuration information for triggering the at least one second access object to send SSB, or the WUS configuration information for triggering the 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;

[0676] 2) The WUS configuration information for triggering the RACH listening of the at least one second access object, or the WUS configuration information for triggering the RACH adaptation of the at least one second access object;

[0677] 3) The relevant configuration information of the SSB currently being sent by the at least one second access object, which may specifically include at least one of the following:

[0678] Whether the at least one second access object is sending an SSB;

[0679] At least one of the frequency point of the SSB being sent by the at least one second access object, the SSB transmission period, and the number of SSBs within one transmission period;

[0680] The transmission mode of the SSB being sent by the at least one second access object, and the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, a compact transmission mode, a long-period transmission mode (the SSB transmission period is long), and an on-demand transmission mode. Among them, the energy-saving transmission mode may be a simplified transmission mode that only sends the Primary Synchronization Signal (PSS) and the Secondary Synchronization Signal (SSS), and the compact transmission mode may be a mode where there is no time domain gap between multiple SSBs.

[0681] 4) The relevant configuration information of the RACH listening behavior currently being performed by the at least one second access object, which may specifically include at least one of the following:

[0682] Whether the at least one second access object is performing RACH listening;

[0683] At least one of the transmission period of the RACH being listened to by the at least one second access object, the number of RACHs within one transmission period, the RACH frequency domain resource configuration information, and the RACH time domain resource configuration information;

[0684] The listening mode of the at least one second access object for listening to the RACH, where the listening mode includes one of a normal listening mode, a simplified listening mode (e.g., reduced RO opportunity), an aggregated listening mode, and an on-demand listening mode. Among them, the simplified listening mode may include reduced RO opportunity, and the aggregated listening mode may be a listening mode without a time domain gap between multiple ROs. RO is the abbreviation of Physical Random Access Channel Occasion.

[0685] 5) Configuration information related to the SSB sent after being successfully triggered by WUS, which may specifically include at least one of the following:

[0686] After being successfully triggered by WUS, at least one of the frequency point of the SSB sent by the at least one second access object, the period of sending the SSB, and the number of SSBs within one sending period;

[0687] After being successfully triggered by WUS, the listening window for the at least one second access object to send the SSB, that is, the UE listens for the SSB within this listening window;

[0688] After being successfully triggered by WUS, at least one time domain resource index or the position of at least one time domain resource for the at least one second access object to actually send the SSB;

[0689] After being successfully triggered by WUS, at least one of the transmission time length of the SSB sent by the at least one second access object, the number of SSB transmissions, and the number of SSB sending periods;

[0690] After being successfully triggered by WUS, the relative relationship of the SSB sent by the at least one second access object with the SSB sent by the first access object in at least one of the time domain, frequency domain, and spatial domain;

[0691] After being successfully triggered by WUS, the time domain resource position of the first SSB sent by the at least one second access object. For example, it is sent in the nearest SSB period of X time slots / symbols after the triggering signal (WUS) sending time;

[0692] After being successfully triggered by WUS, the sending mode of the at least one second access object to send the SSB, where the sending mode includes one of a normal sending mode, an energy-saving sending mode (e.g., only sending PSS and SSS), an aggregated sending mode (e.g., without a time domain gap between multiple SSBs), a long-period sending mode (longer SSB period), and an on-demand sending mode.

[0693] 6) Related configuration information for RACH monitoring after successful triggering by WUS, which may specifically include:

[0694] After successful triggering by WUS, at least one of the following for the at least one second access object to monitor the RACH: the period of monitoring the RACH, the number of RACHs to monitor, the frequency-domain resource configuration information for monitoring the RACH, the time-domain resource configuration information for monitoring the RACH, and the monitoring mode for monitoring the RACH, where the monitoring mode includes one of a normal monitoring mode, a simplified monitoring mode (e.g., reducing the RO opportunity), an aggregated monitoring mode (no time-domain interval between multiple ROs), and an on-demand monitoring mode.

[0695] 7) Characteristic information of the at least one second access object, which may specifically include at least one of the following:

[0696] The identification information of the at least one second access object;

[0697] Whether the at least one second access object can use the first access object as a reference access object;

[0698] Whether the at least one second access object is co-located with the first access object;

[0699] Whether the at least one second access object is in the same Timing Advance Group (TAG) as the first access object;

[0700] Whether the at least one second access object has a Quasi CoLocation (QCL) relationship with the first access object;

[0701] The reference access object of the at least one second access object;

[0702] The access object co-located with the at least one second access object;

[0703] The access object in the same TAG as the at least one second access object;

[0704] The access object having a QCL relationship with the at least one second access object;

[0705] Whether the at least one second access object is in a prohibited Bar state;

[0706] The priority of the at least one second access object when the UE performs random access channel selection;

[0707] Whether the at least one second access object is set to the Bar state for the first type of UEs, where the first type includes at least one of Reduced Capability (Redcap), Non-Terrestrial Network (NTN), and Network Energy Saving (NES) function;

[0708] The eigenvalue N of the UE ID allowed for random access by the at least one second access object. For example, a UE with UE ID mod number of carriers = N can perform random access on this carrier;

[0709] Whether the at least one second access object supports UE residence;

[0710] Whether the at least one second access object is a suitable cell;

[0711] Whether the at least one second access object supports cell selection and / or cell reselection.

[0712] Wherein, the WUS configuration information included in the first information may include at least one of the following:

[0713] 1) Synchronization reference configuration information of WUS, which may specifically include at least one of the following:

[0714] At least one of the SSB, Channel State Information-Reference Signal (CSI-RS), and tracking reference signal (TRS) of the first access object;

[0715] GPS timing.

[0716] 2) Resource configuration information of WUS, which may specifically include at least one of the following:

[0717] Time-domain resource information;

[0718] Frequency-domain resource information;

[0719] Signal sequence configuration information, for example, preamble grouping, which can specifically indicate the preamble grouping index, indicating that this group of preambles is used to trigger the SSB of the at least one second access object.

[0720] 3) Power configuration information of WUS, which may specifically include at least one of the following:

[0721] Initial signal power;

[0722] Signal power ramp step size.

[0723] 4) Repetition transmission configuration information of the WUS, which may specifically include at least one of the following:

[0724] Number of repetitions for a single signal transmission;

[0725] Maximum number of repetitions for channel transmission.

[0726] 5) Spatial domain parameter configuration information of the WUS, which may specifically include at least one of the following:

[0727] Corresponding relationship between the WUS and the SSB of the first access object;

[0728] Corresponding relationship between the WUS and the SSB of the at least one second access object;

[0729] Corresponding relationship between the WUS and the SSB of the second access object group.

[0730] 6) Transmission timer configuration information of the WUS. The timer is used to avoid overly frequent WUS transmissions. Generally, the timer is started after the WUS is transmitted, and repeated transmission of the WUS is not allowed before the timer expires.

[0731] Among them, the form of the WUS signal includes at least one of the following:

[0732] RACH;

[0733] Msg1;

[0734] Preamble sequence;

[0735] Sounding Reference Signal (SRS);

[0736] Physical Uplink Control Channel (PUCCH).

[0737] Among them, the configuration method of the resource configuration information of the WUS includes at least one of the following:

[0738] Configure a signal resource list in the first information. Each element of the signal resource list corresponds one-to-one with the index size of the second access object or the second access object group. One element in the signal resource list includes one or more resources;

[0739] Configure a signal resource list in the first information. Each element of the signal resource list corresponds explicitly to the second access object or the second access object group index;

[0740] Configure a candidate resource set in the first information, where one or more resources in the candidate resource set correspond to a resource number, and one resource number corresponds to an index of one of the second access objects or one of the second access object groups. The resource number is determined according to at least one of time domain, frequency domain, and spatial domain;

[0741] Configure one or more signal resources for the second access object or the second access object group in the first information.

[0742] Among them, the signal resources configured by the resource configuration information of the WUS include at least one of the following:

[0743] 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, share the same video resources with the common RACH on the first access object;

[0744] The time-frequency resources are the time-frequency resources of the dedicated RACH dedicated to triggering SSB transmission and / or RACH listening on the first access object or the second access object group. Among them, the time-frequency resources of this dedicated RACH can be completely different from the time-frequency resources of the common RACH on the first access object, or can be part of the time-frequency resources of the common RACH on the first access object;

[0745] The time-frequency resources are the time-frequency resources of the dedicated SRS / PUCCH for triggering SSB transmission and / or RACH listening on the first access object or the second access object group.

[0746] Among them, the grouping method of the second access object group includes at least one of the following:

[0747] Configured by the network side device;

[0748] Specified by the protocol.

[0749] Among them, the grouping rules of the second access object group include at least one of the following:

[0750] The second access objects in the same frequency band (band) are in one group;

[0751] The second access objects in the same frequency band interval are in one group;

[0752] The second access objects with at least one of the Initial BWP, active BWP, SSB, and SCS being the same are in one group;

[0753] The second access objects with the same transmission mode are grouped together, where the transmission mode is related to at least one of the following: whether to transmit SSB, whether to perform RACH listening, and whether to support on-demand SSB, etc.;

[0754] The co-located second access objects are grouped together;

[0755] The second access objects with the same SSB transmission period are grouped together.

[0756] Regarding how the terminal device selects the target access object for performing the first operation from the first access object and the second access object group according to the first information, please refer to the introduction of the Figure 2 illustrated embodiment above, which will not be elaborated here.

[0757] Figure 9 In a communication method provided by the illustrated embodiment, since the network-side device can provide the first information about the second access object group to the terminal through the first access object, and the first information includes the system information SIB of the second access object, the terminal can select the target access object for camping or random access from the first access object and the second access object group according to the first information, without the second access object continuously transmitting information such as SSB and SIB all the time, but transmitting SSB on demand or performing RACH listening on demand. Therefore, while saving energy on the network side, the capacity of the network side can be guaranteed to the greatest extent.

[0758] Optionally, the target access object belongs to the second access object group, the first information includes the WUS configuration information for triggering at least one of the second access objects to transmit SSB, or the WUS configuration information for triggering the SSB adaptation adjustment of at least one of the second access objects, and the first information includes the WUS configuration information for triggering at least one of the second access objects to perform random access channel RACH listening, or the WUS configuration information for triggering the RACH listening adaptation adjustment of at least one of the second access objects. A communication method provided by an embodiment of the present application may further include:

[0759] The target access object receives the wake-up signal WUS, where the WUS is used to trigger at least one of the target access object to transmit SSB and listen to RACH.

[0760] In one example, the WUS is transmitted by the terminal when a first condition is met, where the first condition may include at least one of the following:

[0761] 1) The first access object is not a suitable cell;

[0762] 2) The target access object is a suitable cell;

[0763] 3) Perform intra-frequency or inter-frequency measurement on the target access object;

[0764] 4) The target access object is in a first power-saving state, where the first power-saving state includes at least one of not sending SSB, not sending SIB, not listening to RACH, sending power-saving SSB (such as Sparse SSB), sending power-saving SIB (such as Sparse SIB), and power-saving listening to RACH (such as Sparse RACH monitoring), and the power-saving SSB includes one of lightweight SSB, simplified SSB, sparse SSB, and long-period SSB;

[0765] 5) The terminal is sensitive to access delay;

[0766] 6) The terminal is in the process of recovering from a link failure.

[0767] In another example, the wake-up signal WUS for the target access object is sent by the terminal on the assumption that the target access object is in a second power-saving state.

[0768] Wherein, the second power-saving state may include at least one of the following:

[0769] Not sending SIB, normally sending SSB, and performing normal RACH listening;

[0770] Not sending SIB, not sending SSB or sending power-saving SSB (such as simplified SSB or sparse SSB, etc.), with the first access object as a reference, and performing normal RACH listening;

[0771] Not sending SIB, normally sending SSB, and not performing normal RACH listening;

[0772] Not sending SIB, not sending SSB or sending power-saving SSB (such as simplified SSB or sparse SSB, etc.), and not performing normal RACH listening.

[0773] In the first example, the target access object receiving the wake-up signal WUS may include: the target access object receives one WUS for the target access object, and this WUS can be used for two purposes: one is to trigger the target access object to send SSB, and the other is to trigger the target access object to listen to RACH.

[0774] In a second example, the target access object receiving the wake-up signal WUS may include: the target access object receiving a first WUS for triggering the target access object to send an SSB; and the target access object receiving a second WUS, where the second WUS is used to trigger the target access object to listen for a RACH.

[0775] Exemplarily, the target access object receiving the second WUS (the time point of receiving the second WUS) includes one of the following:

[0776] The target access object receives the second WUS that the terminal starts to send after Z time slots / symbols / milliseconds after sending the first WUS;

[0777] The target access object receives the second WUS that the terminal starts to send after X time slots / symbols / milliseconds after receiving feedback for the first WUS;

[0778] The target access object receives the second WUS that the terminal starts to send after Y time slots / symbols / milliseconds after receiving the first SSB successfully triggered by the target access object;

[0779] The target access object receives the second WUS sent by the terminal when the number of transmissions of the first WUS reaches the maximum value;

[0780] The target access object receives the second WUS sent by the terminal after a first timer times out, where the first timer is started after sending the first WUS.

[0781] A communication method provided by this embodiment can trigger a second access object to send an SSB or perform RACH listening on demand, rather than continuously sending an SSB or continuously performing RACH listening, nor not sending an SSB or not performing RACH listening at all. Therefore, it can save energy for the network-side device while maximizing the network-side capacity.

[0782] Optionally, when the WUS is used to trigger SSB transmission, a communication method provided by an embodiment of the present application may further include: the target access object sending an SSB. This enables the target access object to send an SSB on demand under the trigger of the WUS, thereby preparing for accessing the target access object and increasing the network-side capacity.

[0783] Optionally, a communication method provided by an embodiment of the present application may further include:

[0784] The target access object monitors the first operation initiated by the terminal, such as monitoring the RACH initiated by the terminal to the target access object.

[0785] Optionally, a communication method provided in an embodiment of the present application may further include:

[0786] The target access object receives the WUS re - sent by the terminal when the second condition is satisfied, so as to improve the success rate of executing the first operation.

[0787] Wherein, the second condition may include but is not limited to at least one of the following:

[0788] 1) SSB detection fails;

[0789] 2) The number of random access attempts reaches the maximum value;

[0790] The number of WUS transmissions is less than or equal to a preset maximum number of transmissions;

[0791] 3) No feedback for the previous WUS is received;

[0792] 4) The previous WUS is used to trigger the transmission of SSB. After receiving the feedback for the previous WUS signal, a WUS for triggering RACH monitoring is re - sent (that is, the re - transmission of WUS is to trigger RACH monitoring);

[0793] 5) No feedback for the previous WUS is received before the timer times out.

[0794] Optionally, the re - sent WUS signal has at least one of the following characteristics:

[0795] 1) The signal power increases;

[0796] 2) The time interval from the previous WUS transmission is greater than a preset time interval;

[0797] 3) The frequency - domain resources and sequence resources are the same as those of the previous WUS.

[0798] The above introduces a communication method applied to network - connected devices provided in an embodiment of the present application.

[0799] It should be noted that for the random access method or communication method provided in an embodiment of the present application, the execution subject may be a communication device. In an embodiment of the present application, taking the communication device executing the random access method as an example, the communication device provided in an embodiment of the present application is described.

[0800] The following describes a communication device provided in an embodiment of the present application with reference to the accompanying drawings. Since the communication device provided in the embodiment of the present application corresponds to a random access method provided in the embodiment of the present application, the description of the communication device provided in the embodiment of the present application is relatively brief, and the detailed content can be referred to the introduction in the method embodiment part above.

[0801] As Figure 10 shown, an embodiment of the present application provides a random access device 1000, which may include: an information receiving module 1001 and an access object selection module 1002.

[0802] The information receiving module 1001 is configured to receive first information about a second access object group sent by a network-side device through a first access object, where the second access object group includes one or more second access objects different from the first access object, and the first information includes system information SIB of the second access object, and the access object includes one of a carrier, a cell, and a bandwidth part BWP.

[0803] Among them, 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 multi-access object scenario, and the following mainly takes a multi-carrier scenario as an example for illustration.

[0804] In one implementation, in a multi-carrier scenario, the first access object may be an anchor carrier, and the second access object may be a non-anchor carrier. On the anchor carrier, the UE can obtain the system information of the anchor carrier and the necessary system information of other non-anchor carriers. And the UE can perform at least one of random access (Random Access Channel, RACH), data transmission, and data reception on any anchor carrier and non-anchor carrier.

[0805] In another implementation, in a multi-carrier scenario, the first access object may be a carrier that normally transmits SSB, and the second access object may be a carrier that does not normally transmit SSB (SSB-less carrier).

[0806] Among them, the first information may be sent by the first access object through a broadcast message; or it is defaulted that the first information is the same as the corresponding information of the first access object.

[0807] Among them, the system information of the second access object included in the first information includes at least one of the following:

[0808] All or part of the SIBs of the second access object, where the part of the SIBs may include at least one of the following: Public Land Mobile Network (PLMN) information, related configuration information of cell selection criteria, related configuration information of cell reselection criteria, and cell bar information;

[0809] The SIB1 status information of the second access object, where the SIB1 status information includes at least one of not sending SIB1 and SIB1 being carried by the system information of the first access object.

[0810] Among them, the first information corresponds to at least one second access object in the second access object group, and the first information further includes at least one of the following:

[0811] 1) Wake-up Signal (WUS) configuration information for triggering the at least one second access object to send an SSB, or WUS configuration information for triggering the at least one second access object to perform SSB adaptation;

[0812] 2) WUS configuration information for triggering the at least one second access object to perform RACH listening, or WUS configuration information for triggering the at least one second access object to perform RACH adaptation;

[0813] 3) Related configuration information of the SSB currently being sent by the at least one second access object, which may specifically include at least one of the following:

[0814] Whether the at least one second access object is sending an SSB;

[0815] At least one of the frequency point of the SSB being sent by the at least one second access object, the SSB transmission period, and the number of SSBs within one transmission period;

[0816] The transmission mode of the SSB being transmitted by the at least one second access object, where the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, a compact transmission mode, a long-period transmission mode (with a long transmission period of the SSB), and an on-demand transmission mode. Among them, the energy-saving transmission mode may be a simplified transmission mode that only transmits the Primary Synchronization Signal (PSS) and the Secondary Synchronization Signal (SSS), and the compact transmission mode may be a transmission mode where there is no time-domain gap between multiple SSBs.

[0817] 4) Configuration information related to the RACH listening behavior of the at least one second access object currently, which may specifically include at least one of the following:

[0818] Whether the at least one second access object performs RACH listening;

[0819] At least one of the transmission period of the RACH being listened to by the at least one second access object, the number of RACHs within one transmission period, the RACH frequency-domain resource configuration information, and the RACH time-domain resource configuration information;

[0820] The listening mode of the at least one second access object for listening to the RACH, where the listening mode includes one of a normal listening mode, a simplified listening mode (such as reduced RO opportunity), a compact listening mode, and an on-demand listening mode. Among them, the simplified listening mode may include reduced RO opportunity, and the compact listening mode may be a listening mode where there is no time-domain gap between multiple ROs. RO is short for Physical Random Access Channel Occasion.

[0821] 5) Configuration information related to the SSB transmitted after being successfully triggered by WUS, which may specifically include at least one of the following:

[0822] After being successfully triggered by WUS, at least one of the frequency point of the SSB transmitted by the at least one second access object, the transmission period of the SSB, and the number of SSBs within one transmission period;

[0823] After being successfully triggered by WUS, the listening window for the at least one second access object to transmit the SSB, that is, the UE listens to the SSB within this listening window;

[0824] After the successful triggering of WUS, the time-domain resource index or the position of at least one time-domain resource of the at least one second access object for actually transmitting the SSB;

[0825] After the successful triggering of WUS, at least one of the transmission time length of the SSB transmitted by the at least one second access object, the number of SSB transmissions, and the number of SSB transmission periods;

[0826] After the successful triggering of WUS, the relative relationship between the SSB transmitted by the at least one second access object and the SSB transmitted by the first access object in at least one of the time domain, frequency domain, and spatial domain;

[0827] After the successful triggering of WUS, the time-domain resource position of the first SSB transmitted by the at least one second access object, for example, transmitted in the nearest SSB period of X time slots / symbols after the transmission time of the trigger signal (WUS);

[0828] After the successful triggering of WUS, the transmission mode of the SSB transmitted by the at least one second access object, and the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode (for example, only transmitting PSS and SSS), an aggregated transmission mode (for example, no time-domain interval between multiple SSBs), a long-period transmission mode (longer SSB period), and an on-demand transmission mode.

[0829] 6) Configuration information related to RACH listening after the successful triggering of WUS, specifically including:

[0830] After the successful triggering of WUS, at least one of the period of the at least one second access object for listening to RACH, the number of RACHs listened to, the frequency-domain resource configuration information for listening to RACH, the time-domain resource configuration information for listening to RACH, and the listening mode for listening to RACH, where the listening mode includes one of a normal listening mode, a simplified listening mode (for example, reducing the RO opportunity), an aggregated listening mode (no time-domain interval between multiple ROs), and an on-demand listening mode.

[0831] 7) Characteristic information of the at least one second access object itself, specifically including at least one of the following:

[0832] The identification information of the at least one second access object;

[0833] Whether the at least one second access object can use the first access object as a reference access object;

[0834] Whether the at least one second access object is co-located with the first access object;

[0835] Whether the at least one second access object is in the same Timing Advance Group (TAG) as the first access object;

[0836] Whether the at least one second access object has a Quasi CoLocation (QCL) relationship with the first access object;

[0837] The reference access object of the at least one second access object;

[0838] The access object co-located with the at least one second access object;

[0839] The access object in the same TAG as the at least one second access object;

[0840] The access object having a QCL relationship with the at least one second access object;

[0841] Whether the at least one second access object is in the barred state;

[0842] The priority of the at least one second access object when the UE performs random access channel selection;

[0843] Whether the at least one second access object is set to the barred state for the first type of UE, where the first type includes at least one of Reduced Capability (Redcap), Non-Terrestrial Network (NTN), and Network Energy Saving (NES) function;

[0844] The eigenvalue N of the UE ID allowed random access by the at least one second access object. For example, a UE with UE ID mod carrier number = N can perform random access on this carrier;

[0845] Whether the at least one second access object supports UE residence;

[0846] Whether the at least one second access object is a suitable cell;

[0847] Whether the at least one second access object supports cell selection and / or cell reselection.

[0848] Wherein, the WUS configuration information included in the first information may include at least one of the following:

[0849] 1) Synchronization reference configuration information of WUS, which may specifically include at least one of the following:

[0850] At least one of the SSB, Channel State Information-Reference Signal (CSI-RS), and tracking reference signal (TRS) of the first access object;

[0851] GPS timing.

[0852] 2) Resource configuration information of the WUS, which may specifically include at least one of the following:

[0853] Time-domain resource information;

[0854] Frequency-domain resource information;

[0855] Signal sequence configuration information, for example, preamble grouping, which can specifically indicate the preamble group index, indicating that this group of preambles is used to trigger the SSB of the at least one second access object.

[0856] 3) Power configuration information of the WUS, which may specifically include at least one of the following:

[0857] Initial signal power;

[0858] Signal power ramp step.

[0859] 4) Repetition transmission configuration information of the WUS, which may specifically include at least one of the following:

[0860] Number of repetitions for a single signal transmission;

[0861] Maximum number of repetitions for channel transmission.

[0862] 5) Spatial domain parameter configuration information of the WUS, which may specifically include at least one of the following:

[0863] Correspondence between the WUS and the SSB of the first access object;

[0864] Correspondence between the WUS and the SSB of the at least one second access object;

[0865] Correspondence between the WUS and the SSB of the second access object group.

[0866] 6) Transmission timer configuration information of the WUS. The timer is used to avoid overly frequent WUS transmissions. Generally, the timer is started after the WUS is sent, and repeated WUS transmissions are not allowed before the timer expires.

[0867] Among them, the form of the WUS signal includes at least one of the following:

[0868] RACH;

[0869] Msg1;

[0870] Preamble sequence;

[0871] Sounding Reference Signal (SRS);

[0872] Physical Uplink Control Channel (PUCCH).

[0873] Wherein, the configuration method of the resource configuration information of the WUS includes at least one of the following:

[0874] Configure a signal resource list in the first information, each element of the signal resource list corresponds one-to-one with the second access object or the index size of the second access object group, and one element in the signal resource list includes one or more resources;

[0875] Configure a signal resource list in the first information, and each element of the signal resource list corresponds explicitly to the second access object or the second access object group index;

[0876] Configure a candidate resource set in the first information, one or more resources in the candidate resource set correspond to a resource number, and one resource number corresponds to the index of one of the second access objects or one of the second access object groups, and the resource number is determined according to at least one of time domain, frequency domain and space domain;

[0877] Configure one or more signal resources for the second access object or the second access object group in the first information.

[0878] Wherein, the signal resources configured by the resource configuration information of the WUS include at least one of the following:

[0879] The time-frequency resource is the same as the time-frequency resource of the common RACH on the first access object or the second access object group, that is, shares the same video resource as the common RACH on the first access object;

[0880] The time-frequency resource is the time-frequency resource of a dedicated RACH on the first access object or the second access object group dedicated to triggering SSB transmission and / or RACH listening. Among them, the time-frequency resource configuration of this dedicated RACH can be a completely different time-frequency resource from the common RACH on the first access object, or a partial resource of the time-frequency resource of the common RACH on the first access object;

[0881] The time-frequency resource is the time-frequency resource of dedicated SRS / PUCCH for triggering SSB transmission and / or RACH listening on the first access object or the second access object group.

[0882] Among them, the grouping method of the second access object group includes at least one of the following:

[0883] Configured by the network-side device;

[0884] Specified by the protocol.

[0885] Among them, the grouping rules of the second access object group include at least one of the following:

[0886] The second access objects in the same frequency band (band) are grouped into one group;

[0887] The second access objects in the same frequency band range are grouped into one group;

[0888] The second access objects with at least one of the Initial BWP, active BWP, SSB, and SCS being the same are grouped into one group;

[0889] The second access objects with the same transmission mode are grouped into one group, where the transmission mode is related to at least one of the following: whether to transmit SSB, whether to perform RACH listening, and whether to support on-demand SSB, etc.;

[0890] The co-located second access objects are grouped into one group;

[0891] The second access objects with the same SSB transmission period are grouped into one group.

[0892] The access object selection module 1002 is configured 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, where the first operation includes camping or random access.

[0893] Among them, the first rule may be related to at least one of the following:

[0894] One or more access objects that the network-side device indicates or configures for the terminal to randomly access;

[0895] By default, the access object for the terminal to randomly access is the first access object;

[0896] The Bar status information of the second access object;

[0897] The index value of the second access object;

[0898] The center frequency of the second access object;

[0899] The subcarrier spacing (SCS) of the second access object;

[0900] The identifier of the second access object;

[0901] The frequency interval between the second access object and the first access object;

[0902] Whether the second access object performs normal RACH monitoring;

[0903] Whether the second access object normally transmits SSB;

[0904] Whether the second access object meets the requirements for normal RACH monitoring and normal SSB transmission;

[0905] The number of times WUS needs to be sent to the second access object;

[0906] The priority of the second access object;

[0907] The measured signal strength value of the reference signal of the second access object, where the signal strength includes at least one of reference signal receiving power (RSRP) and signal to interference plus noise ratio (SINR);

[0908] A randomly generated access object index;

[0909] The weight value of the second access object;

[0910] A randomly generated access object weight value;

[0911] Whether the first access object is a suitable cell;

[0912] Whether the second access object is a suitable cell.

[0913] Wherein, the priority of the second access object can 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:

[0914] ① The transmission mode of the second access object, and this transmission mode includes one of whether to normally transmit SSB, whether to support on-demand SSB transmission, and whether to normally monitor RACH.

[0915] ② The size of the frequency band interval between the second access object and the first access object;

[0916] ③ The number of the second access object described above.

[0917] The following are two examples to illustrate how the access object selection module 1002 selects 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. Other examples will be involved in the specific embodiments below and will not be elaborated here for the time being. Please refer to the following for details.

[0918] The first example

[0919] The access object selection module 1002 can be used to:

[0920] Determine whether the first access object is a suitable cell;

[0921] When the first access object is a suitable cell, select the first access object as the target access object;

[0922] When the first access object is not a suitable cell, perform the first step or the second step;

[0923] Among them, the first step includes:

[0924] According to the reference signal measurement results corresponding to at least one second access object in the second access object group and the partial or all SIBs of the at least one second access object included in the first information, determine whether the at least one second access object is a suitable cell;

[0925] When one or more of the at least one second access object are suitable cells, select a suitable cell from the at least one second access object as the target access object for performing the first operation according to the first rule.

[0926] Among them, the second step includes:

[0927] Ignore the second access object and find other suitable cells as the target access object for performing the first operation.

[0928] Further, the finding of other suitable cells as the target access object for performing the first operation may include:

[0929] Find a suitable cell from one or more of the second access objects in the second access object group as the target access object for performing the first operation;

[0930] Find a suitable cell from one or more of the third access objects in the third access object group as the target access object for performing the first operation, where the third access object group includes the access objects in the second access object group that meet the third condition.

[0931] Among them, the third condition may include at least one of the following:

[0932] Taking the first access object as a reference;

[0933] Collocated with the first access object;

[0934] Continuous access objects on the same frequency band as the first access object.

[0935] The second example

[0936] The access object selection module 1002 can be used to:

[0937] Determine whether the first access object is a suitable cell according to the SSB measurement result sent by the first access object and the SIB of the first access object;

[0938] Determine whether at least one second access object in the second access object group is a suitable cell according to the reference signal measurement result corresponding to at least one second access object in the second access object group and part or all of the SIBs of the at least one second access object included in the first information;

[0939] In the case where the first access object is a suitable cell and one or more second access objects in the at least one second access object are suitable cells, select a suitable cell from the first access object and the at least one second access object as the target access object for performing the first operation according to the first rule.

[0940] It should be noted that Figure 10 The shown device can implement Figure 2 The shown method and can achieve the same technical effects. Therefore, the description is relatively simple. For related parts, reference can be made to the description of the Figure 2 Shown embodiment above.

[0941] Optionally, as Figure 11 Shown, a random access device 1000 provided by an embodiment of the present application may further include:

[0942] The first WUS sending module 1003 is configured to send a wake-up signal WUS for 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 at least one second access object to send an SSB, or WUS configuration information for triggering SSB adaptation adjustment of at least one second access object, and the first information includes WUS configuration information for triggering at least one second access object to listen to a random access channel RACH, or WUS configuration information for triggering RACH listening adaptation adjustment of at least one second access object, wherein the WUS is used to trigger the target access object to send at least one of an SSB and listen to a RACH.

[0943] In one example, the first WUS sending module 1003 is configured to: send a WUS for the target access object when a first condition is met.

[0944] Wherein, the first condition may include at least one of the following:

[0945] 1) The first access object is not a suitable cell;

[0946] 2) The target access object is a suitable cell;

[0947] 3) Perform intra-frequency or inter-frequency measurement on the target access object;

[0948] 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 an SSB, not sending an SIB, not listening to a RACH, sending an energy-saving SSB (such as a Sparse SSB), sending an energy-saving SIB (such as a Sparse SIB), and energy-saving listening to a RACH (such as Sparse RACH monitoring), and the energy-saving SSB includes one of a lightweight SSB, a simplified SSB, a sparse SSB, and a long-period SSB;

[0949] 5) The terminal is sensitive to access delay;

[0950] 6) The terminal is in the process of recovering from a link failure.

[0951] In another example, the apparatus may further include: a hypothesis 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.

[0952] Wherein, the second energy-saving state may include at least one of the following:

[0953] Do not send SIB, send SSB normally, and perform normal RACH monitoring;

[0954] Do not send SIB, do not send SSB or send energy-saving SSB (such as simplified SSB or sparse SSB, etc.), with the first access object as a reference, and perform normal RACH monitoring;

[0955] Do not send SIB, send SSB normally, and do not perform normal RACH monitoring;

[0956] Do not send SIB, do not send SSB or send energy-saving SSB (such as simplified SSB or sparse SSB, etc.), and do not perform normal RACH monitoring.

[0957] In the first example, the first WUS sending module 1003 can be used to: send one WUS for the target access object, and this WUS can be used to achieve two purposes: one is to trigger the target access object to send SSB, and the other is to trigger the target access object to monitor RACH.

[0958] In the second example, the first WUS sending module 1003 can be used to: send the first WUS for the target access object, where the first WUS is used to trigger the target access object to send SSB; and send the second WUS for the target access object, where the second WUS is used to trigger the target access object to monitor RACH.

[0959] Exemplarily, the first WUS sending module 1003 can be used for one of the following:

[0960] Start sending the second WUS for the target access object after Z time slots / symbols / milliseconds of sending the first WUS;

[0961] Start sending the second WUS for the target access object after X time slots / symbols / milliseconds of receiving the feedback for the first WUS;

[0962] Start sending the second WUS for the target access object after Y time slots / symbols / milliseconds of receiving the first SSB sent after successfully triggering the target access object;

[0963] Send the second WUS for the target access object when the number of transmissions of the first WUS reaches the maximum value;

[0964] Start a first timer after sending the first WUS, and send the second WUS for the target access object after the first timer times out.

[0965] Figure 11A random access device 1000 provided by the illustrated embodiment can trigger a second access object to send an SSB or perform RACH monitoring on demand, rather than continuously sending an SSB or continuously performing RACH monitoring, nor not sending an SSB or not performing RACH monitoring at all. Therefore, while saving energy for the network-side device, it can maximize the capacity of the network side to the greatest extent possible.

[0966] Optionally, as Figure 12 shown, a random access device 1000 provided by an embodiment of the present application may further include:

[0967] An SSB monitoring module 1004, configured to monitor the SSB sent by the target access object when the WUS is used to trigger SSB transmission.

[0968] Exemplarily, the SSB monitoring module 1004 may specifically be used for one of the following:

[0969] Start a third timer after sending the WUS, and start monitoring the SSB sent by the target access object after the third timer expires;

[0970] Start monitoring the SSB sent by the target access object after C time slots / symbols / milliseconds after sending the WUS;

[0971] Start monitoring the SSB sent by the target access object at the next time slot after sending the WUS;

[0972] Monitor the SSB sent by the target access object within the SSB monitoring window configured in the first information.

[0973] Figure 12 A random access device 1000 provided by the illustrated embodiment can trigger a target access object (a second access object) to send an SSB on demand, thereby preparing for RACH of the target access object and increasing the capacity of the network side.

[0974] Optionally, as Figure 13 shown, a random access device 1000 provided by an embodiment of the present application may further include:

[0975] An operation initiation module 1005, configured to initiate the first operation to the target access object.

[0976] Exemplarily, when the target access object is a second access object, the operation initiation module 1005 (the time point of initiating the first operation to the target access object) may specifically be used for one of the following:

[0977] After sending the WUS to the target access object, start the second timer. After the second timer expires, initiate the first operation to the target access object (such as initiating a RACH. Correspondingly, the WUS can be the same WUS for triggering SSB transmission and RACH listening, or the second WUS mentioned above);

[0978] After A time slots / symbols / milliseconds after sending the WUS to the target access object, initiate the first operation to the target access object (such as initiating a RACH. Correspondingly, the WUS can be the same WUS for triggering SSB transmission and RACH listening, or the second WUS mentioned above);

[0979] After B time slots / symbols / milliseconds after receiving the feedback of the WUS for the target access object, initiate the first operation to the target access object (such as initiating a RACH. Correspondingly, the WUS can be the same WUS for triggering SSB transmission and RACH listening, or the second WUS mentioned above).

[0980] Optionally, a random access device 1000 provided in an embodiment of the present application may further include:

[0981] A second WUS sending module, configured to resend a wake-up signal WUS for the target access object when a second condition is met.

[0982] Wherein, the second condition may include but is not limited to at least one of the following:

[0983] 1) SSB detection fails;

[0984] 2) The number of random access attempts reaches the maximum value;

[0985] The number of WUS transmissions is less than or equal to a preset maximum number of transmissions;

[0986] 3) No feedback for the previous WUS is received;

[0987] 4) The previous WUS is used to trigger the transmission of SSB. After receiving the feedback of the previous WUS signal, resend the WUS for triggering RACH listening (that is, resend the WUS again to trigger RACH listening);

[0988] 5) No feedback for the previous WUS is received before the timer expires.

[0989] Optionally, the resend WUS signal has at least one of the following characteristics:

[0990] 1) The signal power increases;

[0991] 2) The transmission time interval from the previous WUS is greater than a preset time interval;

[0992] 3) The frequency domain resources and sequence resources are the same as those of the previous WUS.

[0993] As Figure 14 shown, an embodiment of the present application provides a communication device 1400, which may include: an information sending module 1401.

[0994] The information sending module 1401 is configured to send first information about a second access object group to a terminal through a first access object, where the second access object group includes one or more second access objects different from the first access object, and the first information includes system information SIB of the second access object. The first information is used for the terminal to select a target access object for performing a first operation, where the first operation includes camping or random access, and the access object includes one of a carrier, a cell, and a bandwidth part (BWP).

[0995] Among them, 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 multi-access object scenario, and the following mainly takes a multi-carrier scenario as an example for illustration.

[0996] In one implementation, in a multi-carrier scenario, the first access object may be an anchor carrier, and the second access object may be a non-anchor carrier. On the anchor carrier, the UE can obtain the system information of the anchor carrier and the necessary system information of other non-anchor carriers. And the UE can perform at least one of random access (Random Access CHannel, RACH), data transmission, and data reception on the anchor carrier and the non-anchor carrier arbitrarily.

[0997] In another implementation, in a multi-carrier scenario, the first access object may be a carrier that normally sends SSB, and the second access object may be a carrier that does not normally send SSB (SSB-less carrier).

[0998] Among them, the first information may be sent by the first access object through a broadcast message; or it is defaulted that the first information is the same as the corresponding information of the first access object.

[0999] Among them, the system information of the second access object included in the first information includes at least one of the following:

[1000] All or part of the SIBs of the second access object, where the part of the SIBs may include at least one of the following: Public Land Mobile Network (PLMN) information, related configuration information of cell selection criteria, related configuration information of cell reselection criteria, and cell bar information.

[1001] The SIB1 status information of the second access object, where the SIB1 status information includes at least one of not sending SIB1 and SIB1 being carried by the system information of the first access object.

[1002] Wherein, the first information corresponds to at least one second access object in the second access object group, and the first information further includes at least one of the following:

[1003] 1) The WUS configuration information for triggering the at least one second access object to send the SSB, or the WUS configuration information for triggering the SSB adaptation adjustment of the at least one second access object, where the SSB includes at least one of a synchronization signal block and a physical broadcast channel block;

[1004] 2) The WUS configuration information for triggering the RACH listening of the at least one second access object, or the WUS configuration information for triggering the RACH adaptation of the at least one second access object;

[1005] 3) The related configuration information of the SSB currently being sent by the at least one second access object, which may specifically include at least one of the following:

[1006] Whether the at least one second access object is sending the SSB;

[1007] At least one of the frequency point of the SSB being sent by the at least one second access object, the SSB transmission period, and the number of SSBs within one transmission period;

[1008] The transmission mode of the SSB being transmitted by the at least one second access object, where the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, a compact transmission mode, a long-cycle transmission mode (with a long transmission cycle of the SSB), and an on-demand transmission mode. Among them, the energy-saving transmission mode can be a simplified transmission mode that only transmits the Primary Synchronization Signal (PSS) and the Secondary Synchronization Signal (SSS), and the compact transmission mode can be a mode where there is no time-domain gap between multiple SSBs.

[1009] 4) Configuration information related to the RACH listening behavior of the at least one second access object currently, which may specifically include at least one of the following:

[1010] Whether the at least one second access object performs RACH listening;

[1011] At least one of the transmission cycle of the RACH being listened to by the at least one second access object, the number of RACHs within one transmission cycle, the RACH frequency-domain resource configuration information, and the RACH time-domain resource configuration information;

[1012] The listening mode of the at least one second access object for listening to the RACH, where the listening mode includes one of a normal listening mode, a simplified listening mode (such as reduced RO opportunity), a compact listening mode, and an on-demand listening mode. Among them, the simplified listening mode may include reduced RO opportunity, and the compact listening mode can be a listening mode where there is no time-domain gap between multiple ROs. RO is short for Physical Random Access Channel Occasion.

[1013] 5) Configuration information related to the SSB transmitted after being successfully triggered by WUS, which may specifically include at least one of the following:

[1014] After being successfully triggered by WUS, at least one of the frequency point for the at least one second access object to transmit the SSB, the transmission cycle of the SSB, and the number of SSBs within one transmission cycle;

[1015] After being successfully triggered by WUS, the listening window for the at least one second access object to transmit the SSB, that is, the UE listens to the SSB within this listening window;

[1016] After the successful triggering of WUS, the time-domain resource index or the position of at least one time-domain resource of at least one second access object actually transmitting the SSB;

[1017] After the successful triggering of WUS, at least one of the transmission time length of the SSB transmitted by the at least one second access object, the number of SSB transmissions, and the number of SSB transmission periods;

[1018] After the successful triggering of WUS, the relative relationship of the SSB transmitted by the at least one second access object with the SSB transmitted by the first access object in at least one of the time domain, frequency domain, and spatial domain;

[1019] After the successful triggering of WUS, the time-domain resource position of the first SSB transmitted by the at least one second access object, for example, transmitted in the nearest SSB period of X time slots / symbols after the transmission time of the triggering signal (WUS);

[1020] After the successful triggering of WUS, the transmission mode of the SSB transmitted by the at least one second access object, and the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode (e.g., only transmitting PSS and SSS), an aggregated transmission mode (e.g., no time-domain interval between multiple SSBs), a long-period transmission mode (longer SSB period), and an on-demand transmission mode.

[1021] 6) Configuration information related to RACH listening after the successful triggering of WUS, which may specifically include:

[1022] After the successful triggering of WUS, at least one of the period of the at least one second access object listening to RACH, the number of RACHs listened to, the frequency-domain resource configuration information of listening to RACH, the time-domain resource configuration information of listening to RACH, and the listening mode of listening to RACH, where the listening mode includes one of a normal listening mode, a simplified listening mode (e.g., reducing the RO opportunity), an aggregated listening mode (no time-domain interval between multiple ROs), and an on-demand listening mode.

[1023] 7) Characteristic information of the at least one second access object itself, which may specifically include at least one of the following:

[1024] The identification information of the at least one second access object;

[1025] Whether the at least one second access object can use the first access object as a reference access object;

[1026] Whether the at least one second access object is co-located with the first access object;

[1027] Whether the at least one second access object is in the same Timing Advance Group (TAG) as the first access object;

[1028] Whether the at least one second access object has a Quasi CoLocation (QCL) relationship with the first access object;

[1029] The reference access object of the at least one second access object;

[1030] The access object co-located with the at least one second access object;

[1031] The access object in the same TAG as the at least one second access object;

[1032] The access object having a QCL relationship with the at least one second access object;

[1033] Whether the at least one second access object is in a barred state;

[1034] The priority of the at least one second access object when the UE performs random access channel selection;

[1035] Whether the at least one second access object is set to the barred state for the first type of UE, where the first type includes at least one of Reduced Capability (Redcap), Non-Terrestrial Network (NTN), and Network Energy Saving (NES) function;

[1036] The eigenvalue N of the UE ID allowed for random access by the at least one second access object. For example, a UE with UE ID mod carrier number = N can perform random access on this carrier;

[1037] Whether the at least one second access object supports UE residence;

[1038] Whether the at least one second access object is a suitable cell;

[1039] Whether the at least one second access object supports cell selection and / or cell reselection.

[1040] Wherein, the WUS configuration information included in the first information may include at least one of the following:

[1041] 1) The synchronization reference configuration information of WUS, which may specifically include at least one of the following:

[1042] At least one of the SSB, Channel State Information-Reference Signal (CSI-RS), and tracking reference signal (TRS) of the first access object;

[1043] GPS timing.

[1044] 2) Resource configuration information of the WUS, which may specifically include at least one of the following:

[1045] Time-domain resource information;

[1046] Frequency-domain resource information;

[1047] Signal sequence configuration information, for example, preamble grouping, which may specifically indicate the preamble group index, indicating that this group of preambles is used to trigger the SSB of the at least one second access object.

[1048] 3) Power configuration information of the WUS, which may specifically include at least one of the following:

[1049] Initial signal power;

[1050] Signal power ramp step.

[1051] 4) Repetition transmission configuration information of the WUS, which may specifically include at least one of the following:

[1052] Number of repetitions for a single signal transmission;

[1053] Maximum number of repetitions for channel transmission.

[1054] 5) Spatial domain parameter configuration information of the WUS, which may specifically include at least one of the following:

[1055] Correspondence between the WUS and the SSB of the first access object;

[1056] Correspondence between the WUS and the SSB of the at least one second access object;

[1057] Correspondence between the WUS and the SSB of the second access object group.

[1058] 6) Transmission timer configuration information of the WUS. The timer is used to avoid overly frequent WUS transmissions. Generally, the timer is started after the WUS is transmitted, and repeated WUS transmissions are not allowed before the timer expires.

[1059] Among them, the form of the WUS signal includes at least one of the following:

[1060] RACH;

[1061] Msg1;

[1062] Preamble sequence;

[1063] Sounding Reference Signal (SRS);

[1064] Physical Uplink Control Channel (PUCCH).

[1065] Wherein, the configuration method of the resource configuration information of the WUS includes at least one of the following:

[1066] Configure a signal resource list in the first information, each element of the signal resource list corresponds one-to-one with the second access object or the index size of the second access object group, and one element in the signal resource list includes one or more resources;

[1067] Configure a signal resource list in the first information, and each element of the signal resource list corresponds explicitly to the second access object or the second access object group index;

[1068] Configure a candidate resource set in the first information, one or more resources in the candidate resource set correspond to a resource number, one resource number corresponds to the index of one of the second access objects or one of the second access object groups, and the resource number is determined according to at least one of time domain, frequency domain and space domain;

[1069] Configure one or more signal resources for the second access object or the second access object group in the first information.

[1070] Wherein, the signal resources configured by the resource configuration information of the WUS include at least one of the following:

[1071] The time-frequency resource is the same as the time-frequency resource of the common RACH on the first access object or the second access object group, that is, shares the same video resource as the common RACH on the first access object;

[1072] The time-frequency resource is the time-frequency resource of a dedicated RACH on the first access object or the second access object group dedicated to triggering SSB transmission and / or RACH listening. Among them, the time-frequency resource configuration of this dedicated RACH can be completely different from the time-frequency resource of the common RACH on the first access object, or can be a partial resource of the time-frequency resource of the common RACH on the first access object;

[1073] The time-frequency resource is the time-frequency resource of dedicated SRS / PUCCH for triggering SSB transmission and / or RACH listening on the first access object or the second access object group.

[1074] Wherein, the grouping method of the second access object group includes at least one of the following:

[1075] Configured by the network side device;

[1076] Specified by the protocol.

[1077] Wherein, the grouping rules of the second access object group include at least one of the following:

[1078] The second access objects in the same frequency band are grouped into one group;

[1079] The second access objects in the same frequency band interval are grouped into one group;

[1080] The second access objects with at least one of the Initial BWP, active BWP, SSB, and SCS being the same are grouped into one group;

[1081] The second access objects with the same transmission mode are grouped into one group, where the transmission mode is related to at least one of the following: whether to transmit SSB, whether to perform RACH listening, and whether to support on-demand SSB, etc.;

[1082] The co-located second access objects are grouped into one group;

[1083] The second access objects with the same SSB transmission period are grouped into one group.

[1084] Optionally, a communication device 1400 provided in an embodiment of the present application may further include:

[1085] A first WUS receiving module, configured to receive a wake-up signal WUS by 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 at least one second access object to transmit SSB, or WUS configuration information for triggering SSB adaptation adjustment of at least one second access object, and the first information includes WUS configuration information for triggering at least one second access object to perform random access channel RACH listening, or WUS configuration information for triggering RACH listening adaptation adjustment of at least one second access object, wherein the WUS is used to trigger at least one of the target access object to transmit SSB and listen to RACH.

[1086] In one example, the WUS is sent by the terminal when a first condition is met, where the first condition may include at least one of the following:

[1087] 1) The first access object is not a suitable cell;

[1088] 2) The target access object is a suitable cell;

[1089] 3) Intra-frequency or inter-frequency measurement is performed on the target access object;

[1090] 4) The target access object is in a first power-saving state, where the first power-saving state includes at least one of not sending an SSB, not sending an SIB, not listening to a RACH, sending a power-saving SSB (such as a Sparse SSB), sending a power-saving SIB (such as a Sparse SIB), and power-saving listening to a RACH (such as Sparse RACH monitoring), and the power-saving SSB includes one of a lightweight SSB, a simplified SSB, a sparse SSB, and a long-period SSB;

[1091] 5) The terminal is sensitive to access latency;

[1092] 6) The terminal is in the process of recovering from a link failure.

[1093] In another example, the wake-up signal WUS for the target access object is sent by the terminal assuming that the target access object is in a second power-saving state.

[1094] Wherein, the second power-saving state may include at least one of the following:

[1095] Not sending an SIB, normally sending an SSB, and performing normal RACH listening;

[1096] Not sending an SIB, not sending an SSB or sending a power-saving SSB (such as a simplified SSB or a sparse SSB, etc.), with the first access object as a reference, and performing normal RACH listening;

[1097] Not sending an SIB, normally sending an SSB, and not performing normal RACH listening;

[1098] Not sending an SIB, not sending an SSB or sending a power-saving SSB (such as a simplified SSB or a sparse SSB, etc.), and not performing normal RACH listening.

[1099] In the first example, the first WUS receiving module is configured to: the target access object receives a WUS, which can be used for two purposes: one is to trigger the target access object to send an SSB, and the other is to trigger the target access object to listen for a RACH.

[1100] In the second example, the first WUS receiving module is configured to: the target access object receives a first WUS, and the first WUS is used to trigger the target access object to send an SSB; the target access object receives a second WUS, where the second WUS is used to trigger the target access object to listen for a RACH.

[1101] Exemplarily, the first WUS receiving module is configured to perform one of the following:

[1102] The target access object receives a second WUS for the target access object that starts to be sent Z time slots / symbols / milliseconds after the terminal sends the first WUS.

[1103] The target access object receives a second WUS for the target access object that starts to be sent X time slots / symbols / milliseconds after the terminal receives feedback for the first WUS.

[1104] The target access object receives a second WUS for the target access object that is sent when the number of transmissions of the first WUS by the terminal reaches the maximum value.

[1105] The target access object receives a second WUS for the target access object that is sent after a first timer expires, where the first timer is started after the first WUS is sent.

[1106] A communication method provided by this embodiment can trigger a second access object to send an SSB or perform RACH listening on demand, rather than continuously sending an SSB or continuously performing RACH listening all the time, nor not sending an SSB or not performing RACH listening all the time. Therefore, while saving energy for the network-side device, the capacity of the network-side can be maximally guaranteed.

[1107] Optionally, a communication device 1400 provided by an embodiment of the present application may further include: a signal sending module, configured to, when the WUS is used to trigger SSB sending, the target access object sends an SSB. So that the target access object sends an SSB on demand under the trigger of the WUS, thereby making preparations for accessing the target access object and increasing the capacity of the network-side.

[1108] Optionally, a communication device 1400 provided by an embodiment of the present application may further include: a listening module, configured to listen for a first operation initiated by the terminal by the target access object, for example, listen for a RACH initiated by the terminal to the target access object.

[1109] Optionally, a communication device 1400 provided by an embodiment of the present application may further include:

[1110] A second WUS receiving module, configured to receive a wake-up signal WUS for the target access object that is sent again by the terminal when a second condition is met, so as to improve the success rate of executing the first operation.

[1111] Wherein, the second condition may include but is not limited to at least one of the following:

[1112] 1) SSB detection fails;

[1113] 2) The number of random access attempts reaches the maximum value;

[1114] The number of times of sending WUS is less than or equal to a preset maximum number of times of sending;

[1115] 3) No feedback for the previous WUS is received;

[1116] 4) The previous WUS is used to trigger the sending of SSB. After receiving the feedback for the previous WUS signal, a WUS for triggering RACH listening is sent again (that is, sending WUS again is to trigger RACH listening);

[1117] 5) No feedback for the previous WUS is received before the timer times out.

[1118] Optionally, the re-sent WUS signal has at least one of the following characteristics:

[1119] 1) The signal power increases;

[1120] 2) The time interval from the previous WUS is greater than a preset time interval;

[1121] 3) The frequency domain resources and sequence resources are the same as those of the previous WUS.

[1122] It should be noted that Figure 14 the device shown can implement Figure 9 the method shown, and can achieve the same technical effect. Therefore, the description is relatively simple, and for related parts, reference can be made to the description of the Figure 9 embodiment shown above.

[1123] 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 a chip. The electronic device can be a terminal or other devices other than terminals. Exemplarily, the terminal can include, but is not limited to, the types of the above-mentioned terminal 11, and other devices can be a server, a Network Attached Storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[1124] Optionally, as Figure 15 shown, the embodiments of the present application further provide a communication device 1500, including a processor 1501 and a memory 1502. A program or instruction that can run on the processor 1501 is stored on the memory 1502. For example, when the communication device 1500 is a terminal, when the program or instruction is executed by the processor 1501, each step of the above-mentioned random access method or communication method embodiment is implemented, and the same technical effect can be achieved. When the communication device 1500 is a terminal, when the program or instruction is executed by the processor 1501, each step of the above-mentioned random access method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be elaborated here. When the communication device 1500 is a network-side device, when the program or instruction is executed by the processor 1501, each step of the above-mentioned communication method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be elaborated here.

[1125] The embodiments of the present application further provide a terminal, including a processor and a communication interface. 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. The second access object group includes one or more second access objects different from the first access object, and the first information includes system information SIB of the second access object. The 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 according to the first information and a first rule, where the first operation includes camping or random access. This terminal embodiment corresponds to the above-mentioned terminal-side method embodiment. Each implementation process and implementation manner of the above method embodiment can be applied to this terminal embodiment, and the same technical effect can be achieved. Specifically, Figure 16 A schematic diagram of the hardware structure of a terminal for implementing the embodiments of the present application.

[1126] The terminal 1600 includes, but is not limited to, at least some components such as a radio frequency unit 1601, a network module 1602, an audio output unit 1603, an input unit 1604, a sensor 1605, a display unit 1606, a user input unit 1607, an interface unit 1608, a memory 1609, and a processor 1610.

[1127] Those skilled in the art can understand that the terminal 1600 may further include a power source (such as a battery) for powering each component. The power source can be logically connected to the processor 1610 through a power management system, so as to implement functions such as management of charging, discharging, and power consumption management through the power management system. Figure 16 The terminal structure shown does not limit the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[1128] It should be understood that in the embodiments of the present application, the input unit 1604 may include a Graphics Processing Unit (GPU) 16041 and a microphone 16042. The graphics processor 16041 processes the image data of static pictures or videos obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 1606 may include a display panel 16061, and the display panel 16061 may be configured in the form of a liquid crystal display, an organic light-emitting diode, etc. The user input unit 1607 includes at least one of a touch panel 16071 and other input devices 16072. The touch panel 16071 is also called a touch screen. The touch panel 16071 may include two parts: a touch detection device and a touch controller. The other input devices 16072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be elaborated here.

[1129] In the embodiments of the present application, after receiving downlink data from a network-side device, the radio frequency unit 1601 can transmit it to the processor 1610 for processing; in addition, the radio frequency unit 1601 can send uplink data to the network-side device. Generally, the radio frequency unit 1601 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[1130] The memory 1609 can be used to store software programs or instructions and various data. The memory 1609 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data. Among them, the first storage area may store an operating system, application programs or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 1609 may include a volatile memory or a non-volatile memory, or the memory 1609 may include both a volatile and a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (Synchronous DRAM, SDRAM), a double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), an enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), a synchronous link dynamic random access memory (Synch link DRAM, SLDRAM), and a direct rambus random access memory (Direct Rambus RAM, DRRAM). The memory 1609 in the embodiments of the present application includes but is not limited to these and any other suitable types of memories.

[1131] The processor 1610 may include one or more processing units; optionally, the processor 1610 integrates an application processor and a modem processor. Among them, the application processor mainly processes operations related to the operating system, user interface, and application programs, etc., and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above modem processor may not be integrated into the processor 1610 either.

[1132] Among them, the radio frequency unit 1601 can be used to receive first information about a second access object group sent by a network-side device through a first access object. Among them, the second access object group contains one or more second access objects different from the first access object, and the first information contains the system information SIB of the second access object.

[1133] Among them, the processor 1610 can be used to select a target access object for performing a first operation from the first access object and the second access object group according to the first information and the first rule, where the first operation includes camping or random access, and the access object includes one of a carrier, a cell, and a bandwidth part (BWP).

[1134] In the embodiment of the present application, since the terminal 1600 can select a target access object for camping or random access from the first access object and the second access object group according to the first information and the first rule provided by the network side device to the terminal through the first access object, and does not require the second access object to continuously send information such as SSB and SIB all the time, it is possible to save energy on the network side while maximizing the capacity of the network side to the greatest extent.

[1135] The embodiment of the present application further provides a network side device, including a processor and a communication interface. The communication interface is used to send first information about a second access object group to the terminal through a first access object, where the second access object group includes one or more second access objects different from the first access object, and the first information includes the system information block (SIB) of the second access object. The first information is used for the terminal to select a target access object for performing a first operation, where the first operation includes camping or random access. This embodiment of the network side device corresponds to the above method embodiment of the network side device. Each implementation process and implementation manner of the above method embodiment can be applied to this embodiment of the network side device and can achieve the same technical effect.

[1136] Specifically, the embodiment of the present application further provides a network side device. As Figure 17 shown, the network side device 1700 includes: an antenna 1701, a radio frequency device 1702, a baseband device 1703, a processor 1704, and a memory 1705. The antenna 1701 is connected to the radio frequency device 1702. In the uplink direction, the radio frequency device 1702 receives information through the antenna 1701 and sends the received information to the baseband device 1703 for processing. In the downlink direction, the baseband device 1703 processes the information to be sent and sends it to the radio frequency device 1702. The radio frequency device 1702 processes the received information and then sends it out through the antenna 1701.

[1137] The method executed by the network side device in the above embodiments can be implemented in the baseband device 1703, and the baseband device 1703 includes a baseband processor.

[1138] The baseband device 1703 may include, for example, at least one baseband board, and multiple chips are arranged on the baseband board, such as Figure 17As shown, one of the chips, for example, is a baseband processor, which is connected to the memory 1705 through a bus interface to call the program in the memory 1705 and execute the operations of the network device shown in the above method embodiments.

[1139] The network-side device may further include a network interface 1706, which is, for example, a common public radio interface (CPRI).

[1140] Specifically, the network-side device 17000 in the embodiments of the present invention further includes: instructions or programs stored on the memory 1705 and executable on the processor 1704. The processor 1704 calls the instructions or programs in the memory 1705 to execute Figure 14 the methods executed by the modules shown, and achieves the same technical effects. To avoid repetition, it will not be elaborated here.

[1141] The embodiments of the present application further provide a readable storage medium, on which programs or instructions are stored. When the programs or instructions are executed by a processor, the various processes of the above random access method or communication method embodiments are implemented, and the same technical effects can be achieved. To avoid repetition, it will not be elaborated here.

[1142] Among them, the processor is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disks, or optical discs, etc.

[1143] The embodiments of the present application further provide a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above random access method or communication method embodiments, and the same technical effects can be achieved. To avoid repetition, it will not be elaborated here.

[1144] It should be understood that the chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, system chip, chip system, or system-on-chip.

[1145] The embodiments of the present application further provide 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 random access method or communication method embodiments, and the same technical effects can be achieved. To avoid repetition, it will not be elaborated here.

[1146] The embodiments of the present application further provide a communication system, including: a terminal and a network-side device. The terminal can be used to execute as Figure 2Steps of the random access method, and the network side device can be used to execute steps such as Figure 9 Steps of the communication method described.

[1147] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without more limitations, an element defined by the statement "including one..." does not exclude the presence of additional identical elements in the process, method, article or device including that element. In addition, it should be pointed out 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 reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[1148] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-described embodiment methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. The computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disc), and includes several instructions for causing a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of the present application.

[1149] The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Those of ordinary skill in the art, under the inspiration of the present application and without departing from the spirit and scope protected by the claims of the present application, can also make many forms, all of which fall within the protection scope of the present application.

Claims

1. A random access method, characterized in that, The method includes: The terminal receives first information about a second access object group sent by a network-side device through a first access object. Among them, the second access object group contains one or more second access objects different from the first access object, and the first information contains the system information SIB of the second access object. The terminal selects a target access object for performing a first operation from the first access object and the second access object group according to the first information and a first rule. Among them, the first operation includes camping 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, characterized in that, The system information SIB of the second access object includes at least one of the following: All or part of the SIB of the second access object; The system information block 1 SIB1 status information of the second access object, and the SIB1 status information includes at least one of not sending SIB1 and SIB1 being carried by the system information of the first access object.

3. The method according to claim 1, characterized in that, The first information corresponds to at least one second access object in the second access object group, and the first information further includes at least one of the following: The wake-up signal WUS configuration information for triggering at least one second access object to send an SSB, or the WUS configuration information for triggering the SSB adaptation adjustment of at least one second access object, where the SSB includes at least one of a synchronization signal block and a physical broadcast channel block; The WUS configuration information for triggering the random access channel RACH listening of at least one second access object, or the WUS configuration information for triggering the RACH listening adaptation adjustment of at least one second access object; The relevant configuration information of the SSB currently being sent by at least one second access object; The relevant configuration information of the RACH listening behavior currently in which at least one second access object is located; The relevant configuration information of the SSB sent after being successfully triggered by WUS; The relevant configuration information of RACH listening after being successfully triggered by WUS; The characteristic information of at least one second access object itself.

4. The method according to any one of claims 1-3, characterized in that, The first rule is related to at least one of the following: One or more access objects that the network-side device indicates or configures that the terminal can randomly access; By default, the access object that the terminal is to randomly access is the first access object; The Bar status information of the second access object; The index value of the second access object; The center frequency of the second access object; The subcarrier spacing SCS of the second access object; The identifier of the second access object; The frequency interval between the second access object and the first access object; Whether the second access object performs normal RACH listening; Whether the second access object normally sends an SSB; Whether the second access object satisfies normal RACH listening and normal SSB sending; The number of times of sending WUS to the second access object that is required; The priority of the second access object; The signal strength measurement value of the reference signal of the second access object, and the signal strength includes at least one of the reference signal received power RSRP and the signal-to-interference-plus-noise ratio SINR. Randomly generated access object index; Weight value of the second access object; Randomly generated access object weight value; Whether the first access object is a suitable cell; Whether the second access object is a suitable cell.

5. The method according to claim 1, characterized in that,Selecting 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 includes: Determining whether the first access object is a suitable cell; When the first access object is a suitable cell, selecting the first access object as the target access object; When the first access object is not a suitable cell, performing the first step or the second step; Wherein, the first step includes: Determining whether at least one second access object in the second access object group is a suitable cell according to the reference signal measurement result corresponding to at least one second access object and partial or all SIBs of the at least one second access object included in the first information; When one or more second access objects in the at least one second access object are suitable cells, selecting a suitable cell from the at least one second access object as the target access object for performing the first operation according to the first rule; Wherein, the second step includes: Ignoring the second access object and looking for other suitable cells as the target access object for performing the first operation.

6. The method according to claim 5, wherein Looking for other suitable cells as the target access object for performing the first operation includes: Looking for a suitable cell from one or more second access objects in the second access object group as the target access object for performing the first operation; Looking for a suitable cell from one or more third access objects in the third access object group as the target access object for performing the first operation, wherein the third access object group includes access objects in the second access object group that meet the third condition; Wherein, the third condition includes at least one of the following: Taking the first access object as a reference; Collocating with the first access object; Being a continuous access object on the same frequency band as the first access object.

7. The method according to claim 1, wherein Selecting 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 includes: Determining whether the first access object is a suitable cell according to the SSB measurement result sent by the first access object and the SIB of the first access object; Determining whether at least one second access object in the second access object group is a suitable cell according to the reference signal measurement result corresponding to at least one second access object and partial or all SIBs of the at least one second access object included in the first information; When the first access object is a suitable cell and one or more second access objects in 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 as the target access object for performing the first operation according to the first rule.

8. The method according to claim 3, wherein The target access object belongs to the second access object group. The first information includes wake-up signal (WUS) configuration information for triggering at least one second access object to send a synchronization signal block (SSB), or WUS configuration information for triggering SSB adaptation adjustment of at least one second access object, and the first information includes WUS configuration information for triggering at least one second access object to listen on a random access channel (RACH), or WUS configuration information for triggering RACH listening adaptation adjustment of at least one second access object. The method further includes: The terminal sends a wake-up signal (WUS) for the target access object, where the WUS is used to trigger the target access object to perform at least one of sending an SSB and listening on a RACH.

9. The method according to claim 8, wherein The terminal sending a wake-up signal (WUS) for the target access object includes: When a first condition is satisfied, the terminal sends a WUS for the target access object; where 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 power-saving state, where the first power-saving state includes at least one of not sending an SSB, not sending a system information block (SIB), not listening on a RACH, sending a power-saving SSB, sending a power-saving SIB, and power-saving listening on a RACH. The power-saving SSB includes one of a lightweight SSB, a simplified SSB, a sparse SSB, and a long-period SSB; The terminal is sensitive to access latency; The terminal is in a process of recovering from a link failure.

10. The method according to claim 8 or 9, wherein The terminal sending a wake-up signal (WUS) for the target access object includes: The terminal sends a first WUS for the target access object, where the first WUS is used to trigger the target access object to send an SSB; The terminal sends a second WUS for the target access object, where the second WUS is used to trigger the target access object to listen on a RACH.

11. The method according to claim 8, wherein, When the WUS is used to trigger the target access object to send an SSB, the method further includes: The terminal listens on the SSB sent by the target access object.

12. The method according to claim 11, wherein, The listening on the SSB sent by the target access object includes one of the following: Starting a third timer after sending the WUS, and starting to listen on the SSB sent by the target access object after the third timer expires; Starting to listen on the SSB sent by the target access object after C time slots / symbols / milliseconds after sending the WUS; Starting to listen on the SSB sent by the target access object in the next time slot after sending the WUS; Listening on the SSB sent by the target access object within the SSB listening window configured in the first information.

13. The method according to claim 11, wherein, The method further includes: The terminal initiates the first operation for the target access object.

14. The method according to claim 13, wherein, The target access object is a second access object. Wherein, initiating the first operation for the target access object includes one of the following: After sending WUS to the target access object, start a second timer. After the second timer expires, initiate the first operation to the target access object; After A time slots / symbols / milliseconds after sending WUS to the target access object, initiate the first operation to the target access object; After B time slots / symbols / milliseconds after receiving the feedback of WUS for the target access object, initiate the first operation to the target access object.

15. A communication method, wherein, The method includes: The network side device sends first information about a second access object group to the terminal through a first access object, where the second access object group includes one or more second access objects different from the first access object, and the first information includes the system information SIB of the second access object. The first information is used for the terminal to select a target access object to perform a first operation, where the first operation includes camping or random access, and the access object includes one of a carrier, a cell, and a bandwidth part BWP.

16. The method according to claim 15, wherein, The system information SIB of the second access object includes at least one of the following: All or part of the SIB of the second access object; The system information block 1 SIB1 status information of the second access object, where the SIB1 status information includes at least one of not sending SIB1 and SIB1 being carried by the system information of the first access object.

17. The method according to claim 15, wherein, The first information corresponds to at least one second access object in the second access object group, and the first information further includes at least one of the following: The wake-up signal WUS configuration information for triggering at least one second access object to send an SSB, or the WUS configuration information for triggering the SSB adaptation adjustment of at least one second access object, where the SSB includes at least one of a synchronization signal block and a physical broadcast channel block; The WUS configuration information for triggering the random access channel RACH listening of at least one second access object, or the WUS configuration information for triggering the RACH listening adaptation adjustment of at least one second access object; The relevant configuration information of the SSB currently being sent by at least one second access object; The relevant configuration information of the RACH listening behavior currently in which at least one second access object is located; The relevant configuration information of the SSB sent after being successfully triggered by WUS; The relevant configuration information of RACH listening after being successfully triggered by WUS; The characteristic information of at least one second access object itself.

18. The method according to claim 17, wherein, The target access object belongs to the second access object group. The first information includes the wake-up signal WUS configuration information for triggering at least one second access object to send an SSB, or the WUS configuration information for triggering the SSB adaptation adjustment of at least one second access object, and the first information includes the WUS configuration information for triggering the random access channel RACH listening of at least one second access object, or the WUS configuration information for triggering the RACH listening adaptation adjustment of at least one second access object. The method further includes: The target access object receives a wake-up signal WUS, where the WUS is used to trigger the target access object to send at least one of an SSB and listen for a RACH.

19. The method according to claim 18, wherein, The WUS is sent by the terminal when a first condition is met, where 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, where the first energy-saving state includes at least one of not sending an SSB, not sending an SIB, not listening for a RACH, sending an energy-saving SSB, sending an energy-saving SIB, and energy-saving listening for a RACH, and the energy-saving SSB includes one of a lightweight SSB, a simplified SSB, a sparse SSB, and a long-period SSB; The terminal is sensitive to access latency; The terminal is in the process of recovering from a link failure.

20. The method according to claim 18 or 19, characterized in that, Receiving the wake-up signal WUS for the target access object includes: The target access object receives a first WUS, and the first WUS is used to trigger the target access object to send an SSB; The target access object receives a second WUS, where the second WUS is used to trigger the target access object to listen for a RACH.

21. The method according to claim 18, characterized in that, It further includes: The target access object listens for the first operation initiated by the terminal.

22. A random access device, characterized in that, The device includes: 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, where the second access object group includes one or more second access objects different from the first access object, and the first information includes the system information SIB of the second access object; An access object selection module, configured 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 a first rule, where the first operation includes camping or random access.

23. The device according to claim 22, characterized in that, The first information corresponds to at least one second access object in the second access object group, and the first information further includes at least one of the following: WUS configuration information for triggering at least one of the second access objects to send an SSB, or WUS configuration information for triggering SSB adaptation adjustment of at least one of the second access objects, where the SSB includes at least one of a synchronization signal block and a physical broadcast channel block; WUS configuration information for triggering random access channel RACH listening of at least one of the second access objects, or WUS configuration information for triggering RACH listening adaptation adjustment of at least one of the second access objects; Relevant configuration information of the SSB currently being sent by at least one of the second access objects; Relevant configuration information of the RACH listening behavior currently being performed by at least one of the second access objects; Relevant configuration information of the SSB sent after being successfully triggered by WUS; Relevant configuration information of RACH listening after being successfully triggered by WUS; Characteristic information of at least one of the second access objects itself.

24. The device according to claim 22, characterized in that, The first rule is related to at least one of the following: One or more access objects indicated or configured by a network - side device for a terminal to randomly access; By default, the access object to which the terminal is to randomly access is the first access object; The Bar status information of the second access object; The index value of the second access object; The center frequency of the second access object; The sub - carrier spacing SCS of the second access object; The identifier of the second access object; The frequency interval between the second access object and the first access object; Whether the second access object performs normal RACH listening; Whether the second access object normally transmits SSB; Whether the second access object meets the requirements for normal RACH listening and normal SSB transmission; The number of times WUS needs to be sent to the second access object; The priority of the second access object; The measured value of the signal strength of the reference signal of the second access object, where the signal strength includes at least one of reference signal received power RSRP and signal - to - interference - plus - noise ratio SINR; A randomly generated access object index; The weight value of the second access object; A randomly generated access object weight value; Whether the first access object is a suitable cell; Whether the second access object is a suitable cell.

25. A communication device, characterized in that, The device includes: An information sending module, configured to send first information about a second access object group to a terminal through a first access object, where the second access object group includes one or more second access objects different from the first access object, and the first information includes the system information SIB of the second access object, and the first information is used for the terminal to select a target access object to perform a first operation, where the first operation includes camping or random access, and the access object includes one of a carrier, a cell, and a bandwidth part BWP.

26. The device according to claim 25, characterized in that, The first information corresponds to at least one second access object in the second access object group, and the first information further includes at least one of the following: WUS configuration information for triggering at least one of the second access objects to send SSB, or WUS configuration information for triggering adaptive adjustment of SSB of at least one of the second access objects, where the SSB includes at least one of a synchronization signal block and a physical broadcast channel block; WUS configuration information for triggering random access channel RACH listening of at least one of the second access objects, or WUS configuration information for triggering adaptive adjustment of RACH listening of at least one of the second access objects; Relevant configuration information of the SSB currently being sent by at least one of the second access objects; Relevant configuration information of the RACH listening behavior currently in which at least one of the second access objects is located; Relevant configuration information of the SSB sent after being successfully triggered by WUS; Relevant configuration information of RACH listening after being successfully triggered by WUS; The characteristic information of at least one of the second access objects itself.

27. A terminal, characterized in that, Including a processor and a memory, the memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, it implements the steps of the random access method according to any one of claims 1 to 14.

28. A network-side device, characterized in that, It includes a processor and a memory, and the memory stores programs or instructions that can run on the processor. When the programs or instructions are executed by the processor, the steps of the communication method according to any one of claims 15 to 21 are implemented.

29. A readable storage medium, characterized in that, Programs or instructions are stored on the readable storage medium. When the programs or instructions are executed by a processor, the steps of the random access method according to any one of claims 1 to 14 are implemented, or the steps of the communication method according to any one of claims 15 to 21 are implemented.

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